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<h3>
Andreas Klebinger pushed to branch wip/andreask/xchg_primop
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9">8960491c</a></strong>
<div>
<span>by Tamar Christina</span>
<i>at 2020-05-19T18:39:08+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">winio: Add Atomic Exchange PrimOp and implement Atomic Ptr exchanges.
The initial version was rewritten by Tamar Christina.
It was rewritten in large parts by Andreas Klebinger.
</pre>
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<h4>24 changed files:</h4>
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<a href="#9ab3868b23ed5d5a6e12ef902049902556fa4009">
aclocal.m4
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<li class="file-stats">
<a href="#451725cc4e5d443a3b7c2adcdf224840f953b7e2">
compiler/GHC/Builtin/primops.txt.pp
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<li class="file-stats">
<a href="#c898e00d01234ab22d3b485be68db3645f52f220">
compiler/GHC/Cmm/MachOp.hs
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<a href="#71e696f452eb493722d70306c6f304fc9b2f6a95">
compiler/GHC/Cmm/Parser.y
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<a href="#c1d65bce6c6501bf42d5bf890e846709b5645832">
compiler/GHC/CmmToAsm/CPrim.hs
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<a href="#f71fa75baa7807186473f09c45a9ada1b72f4c6c">
compiler/GHC/CmmToAsm/PPC/CodeGen.hs
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<a href="#e76eae04dea432f874db91c25e4a5725d7cc127b">
compiler/GHC/CmmToAsm/SPARC/CodeGen.hs
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<a href="#2bae5947e9412f6deebf4db7dcb89d780913130f">
compiler/GHC/CmmToAsm/X86/CodeGen.hs
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<a href="#7b360ca84c1b9aaecc0f9de207a7698dc36514fe">
compiler/GHC/CmmToAsm/X86/Instr.hs
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<a href="#335d279236d65dcf13f2bab3891e515cb803203c">
compiler/GHC/CmmToAsm/X86/Ppr.hs
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<a href="#76664ab267df4fc0bec2465efd78bf0afacfe3a7">
compiler/GHC/CmmToC.hs
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<a href="#a49dbda5c8a9c380f638f55cf5ade791db0017cc">
compiler/GHC/CmmToLlvm/CodeGen.hs
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<a href="#d12a108e34fe83acc9c99357ae841e22a0af0a23">
compiler/GHC/StgToCmm/Prim.hs
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<a href="#87db583be5c13c1f7b3c958b10e03d67b6a2ca06">
configure.ac
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<a href="#b421960e854c6cfa1e4ca830bd6a5fc6eef91168">
docs/users_guide/8.12.1-notes.rst
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<a href="#ccd32698c1d6d80e18d4e38a453603292e206906">
includes/stg/Prim.h
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<a href="#2d838bb8165073c4e5672387ae3340ad8d483b01">
libraries/base/GHC/Ptr.hs
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<a href="#786d2d970e91533a64e0123b52368c3ec897ed39">
libraries/ghc-prim/cbits/atomic.c
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<a href="#54f2593fa6d429b2b82cc2200e8bcda0f38854de">
libraries/ghc-prim/changelog.md
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<a href="#2ab80221ce99aa96a346b29d4e98230cf4d915a7">
rts/package.conf.in
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<a href="#e432c7b248b68100c3cc37db36ee80d975efd697">
rts/rts.cabal.in
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<a href="#b9bba9766faf563ab195fb1402f14fa78ad5c66f">
testsuite/tests/codeGen/should_run/all.T
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<a href="#adf5225589c3a01be46a7e6e9927a0d7f772d32d">
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testsuite/tests/codeGen/should_run/cg_xchg001.hs
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testsuite/tests/codeGen/should_run/cg_xchg001.stdout
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<h4>Changes:</h4>
<li id="9ab3868b23ed5d5a6e12ef902049902556fa4009">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#9ab3868b23ed5d5a6e12ef902049902556fa4009"><strong>aclocal.m4</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1341" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1341,8 +1341,9 @@ AC_DEFUN([FP_GCC_VERSION], [</td>
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<pre style="margin: 0;"> <span id="LC1341" class="line" lang="plaintext"> AC_MSG_CHECKING([version of gcc])</span>
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<pre style="margin: 0;"> <span id="LC1342" class="line" lang="plaintext"> fp_cv_gcc_version="`$CC -v 2>&1 | sed -n -e '1,/version /s/.*version [[^0-9]]*\([[0-9.]]*\).*/\1/p'`"</span>
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<pre style="margin: 0;"> <span id="LC1343" class="line" lang="plaintext"> AC_MSG_RESULT([$fp_cv_gcc_version])</span>
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<pre style="margin: 0;">-<span id="LC1344" class="line" lang="plaintext"> FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [4.6],</span>
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<pre style="margin: 0;">-<span id="LC1345" class="line" lang="plaintext"> [AC_MSG_ERROR([Need at least gcc version 4.6 (4.7+ recommended)])])</span>
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<pre style="margin: 0;">+<span id="LC1344" class="line" lang="plaintext"> # 4.7 is needed for __atomic_ builtins.</span>
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<pre style="margin: 0;">+<span id="LC1345" class="line" lang="plaintext"> FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [4.7],</span>
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<pre style="margin: 0;">+<span id="LC1346" class="line" lang="plaintext"> [AC_MSG_ERROR([Need at least gcc version 4.7 (newer recommended)])])</span>
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<pre style="margin: 0;"> <span id="LC1347" class="line" lang="plaintext"> ])</span>
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<pre style="margin: 0;"> <span id="LC1348" class="line" lang="plaintext"> AC_SUBST([GccVersion], [$fp_cv_gcc_version])</span>
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<pre style="margin: 0;"> <span id="LC1349" class="line" lang="plaintext"> else</span>
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<li id="451725cc4e5d443a3b7c2adcdf224840f953b7e2">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#451725cc4e5d443a3b7c2adcdf224840f953b7e2"><strong>compiler/GHC/Builtin/primops.txt.pp</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2473,6 +2473,18 @@ primop WriteOffAddrOp_Word64 "writeWord64OffAddr#" GenPrimOp</td>
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<pre style="margin: 0;"> <span id="LC2473" class="line" lang="puppet"><span class="s1" style="color: #d14;"> with has_side_effects = True</span></span>
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<pre style="margin: 0;"> <span id="LC2474" class="line" lang="puppet"><span class="s1" style="color: #d14;"> can_fail = True</span></span>
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<pre style="margin: 0;"> <span id="LC2475" class="line" lang="puppet"></span>
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<pre style="margin: 0;">+<span id="LC2476" class="line" lang="puppet"><span class="s1" style="color: #d14;">primop InterlockedExchange_Addr "interlockedExchangeAddr#" GenPrimOp</span></span>
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<pre style="margin: 0;">+<span id="LC2477" class="line" lang="puppet"><span class="s1" style="color: #d14;"> Addr# -> Addr# -> State# s -> (# State# s, Addr# #)</span></span>
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<pre style="margin: 0;">+<span id="LC2478" class="line" lang="puppet"><span class="s1" style="color: #d14;"> {The atomic exchange operation. Atomically exchanges the value at the first address</span></span>
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<pre style="margin: 0;">+<span id="LC2479" class="line" lang="puppet"><span class="s1" style="color: #d14;"> with the Addr# given as second argument. Implies a read barrier.}</span></span>
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<pre style="margin: 0;">+<span id="LC2480" class="line" lang="puppet"><span class="s1" style="color: #d14;"> with has_side_effects = True</span></span>
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<pre style="margin: 0;">+<span id="LC2481" class="line" lang="puppet"></span>
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<pre style="margin: 0;">+<span id="LC2482" class="line" lang="puppet"><span class="s1" style="color: #d14;">primop InterlockedExchange_Int "interlockedExchangeInt#" GenPrimOp</span></span>
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<pre style="margin: 0;">+<span id="LC2483" class="line" lang="puppet"><span class="s1" style="color: #d14;"> Addr# -> Int# -> State# s -> (# State# s, Int# #)</span></span>
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<pre style="margin: 0;">+<span id="LC2484" class="line" lang="puppet"><span class="s1" style="color: #d14;"> {The atomic exchange operation. Atomically exchanges the value at the address</span></span>
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<pre style="margin: 0;">+<span id="LC2485" class="line" lang="puppet"><span class="s1" style="color: #d14;"> with the given value. Returns the old value. Implies a read barrier.}</span></span>
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<pre style="margin: 0;">+<span id="LC2486" class="line" lang="puppet"><span class="s1" style="color: #d14;"> with has_side_effects = True</span></span>
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<pre style="margin: 0;">+<span id="LC2487" class="line" lang="puppet"></span>
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<pre style="margin: 0;"> <span id="LC2488" class="line" lang="puppet"><span class="s1" style="color: #d14;">------------------------------------------------------------------------</span></span>
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<pre style="margin: 0;"> <span id="LC2489" class="line" lang="puppet"><span class="s1" style="color: #d14;">section "Mutable variables"</span></span>
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<pre style="margin: 0;"> <span id="LC2490" class="line" lang="puppet"><span class="s1" style="color: #d14;"> {Operations on MutVar\#s.}</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#c898e00d01234ab22d3b485be68db3645f52f220"><strong>compiler/GHC/Cmm/MachOp.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -632,6 +632,9 @@ data CallishMachOp</td>
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<pre style="margin: 0;"> <span id="LC632" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRead</span> <span class="kt" style="color: #458; font-weight: 600;">Width</span></span>
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<pre style="margin: 0;"> <span id="LC633" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicWrite</span> <span class="kt" style="color: #458; font-weight: 600;">Width</span></span>
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<pre style="margin: 0;"> <span id="LC634" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MO_Cmpxchg</span> <span class="kt" style="color: #458; font-weight: 600;">Width</span></span>
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<pre style="margin: 0;">+<span id="LC635" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Should be an AtomicRMW variant eventually.</span></span>
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<pre style="margin: 0;">+<span id="LC636" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Sequential consistent.</span></span>
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<pre style="margin: 0;">+<span id="LC637" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="kt" style="color: #458; font-weight: 600;">Width</span></span>
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<pre style="margin: 0;"> <span id="LC638" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Eq</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Show</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC639" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC640" class="line" lang="haskell"><span class="cd">-- | The operation to perform atomically.</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#71e696f452eb493722d70306c6f304fc9b2f6a95"><strong>compiler/GHC/Cmm/Parser.y</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1022,7 +1022,12 @@ callishMachOps = listToUFM $</td>
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<pre style="margin: 0;"> <span id="LC1022" class="line" lang="plaintext"> ( "cmpxchg8", (MO_Cmpxchg W8,)),</span>
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<pre style="margin: 0;"> <span id="LC1023" class="line" lang="plaintext"> ( "cmpxchg16", (MO_Cmpxchg W16,)),</span>
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1024
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<pre style="margin: 0;"> <span id="LC1024" class="line" lang="plaintext"> ( "cmpxchg32", (MO_Cmpxchg W32,)),</span>
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<pre style="margin: 0;">-<span id="LC1025" class="line" lang="plaintext"> ( "cmpxchg64", (MO_Cmpxchg W64,))</span>
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<pre style="margin: 0;">+<span id="LC1025" class="line" lang="plaintext"> ( "cmpxchg64", (MO_Cmpxchg W64,)),</span>
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<pre style="margin: 0;">+<span id="LC1026" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC1027" class="line" lang="plaintext"> ( "xchg8", (MO_Xchg W8,)),</span>
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<pre style="margin: 0;">+<span id="LC1028" class="line" lang="plaintext"> ( "xchg16", (MO_Xchg W16,)),</span>
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<pre style="margin: 0;">+<span id="LC1029" class="line" lang="plaintext"> ( "xchg32", (MO_Xchg W32,)),</span>
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<pre style="margin: 0;">+<span id="LC1030" class="line" lang="plaintext"> ( "xchg64", (MO_Xchg W64,))</span>
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<pre style="margin: 0;"> <span id="LC1031" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC1032" class="line" lang="plaintext"> -- ToDo: the rest, maybe</span>
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<pre style="margin: 0;"> <span id="LC1033" class="line" lang="plaintext"> -- edit: which rest?</span>
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<li id="c1d65bce6c6501bf42d5bf890e846709b5645832">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#c1d65bce6c6501bf42d5bf890e846709b5645832"><strong>compiler/GHC/CmmToAsm/CPrim.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -4,6 +4,7 @@ module GHC.CmmToAsm.CPrim</td>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">atomicWriteLabel</span></span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">atomicRMWLabel</span></span>
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<pre style="margin: 0;"> <span id="LC6" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">cmpxchgLabel</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">xchgLabel</span></span>
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<pre style="margin: 0;"> <span id="LC8" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">popCntLabel</span></span>
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pdepLabel</span></span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pextLabel</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -105,6 +106,15 @@ atomicRMWLabel w amop = "hs_atomic_" ++ pprFunName amop ++ pprWidth w</td>
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<pre style="margin: 0;"> <span id="LC106" class="line" lang="haskell"> <span class="n" style="color: #333;">pprFunName</span> <span class="kt" style="color: #458; font-weight: 600;">AMO_Or</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"or"</span></span>
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106
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107
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<pre style="margin: 0;"> <span id="LC107" class="line" lang="haskell"> <span class="n" style="color: #333;">pprFunName</span> <span class="kt" style="color: #458; font-weight: 600;">AMO_Xor</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"xor"</span></span>
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107
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108
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<pre style="margin: 0;"> <span id="LC108" class="line" lang="haskell"></span>
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109
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<pre style="margin: 0;">+<span id="LC109" class="line" lang="haskell"><span class="n" style="color: #333;">xchgLabel</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Width</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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110
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<pre style="margin: 0;">+<span id="LC110" class="line" lang="haskell"><span class="n" style="color: #333;">xchgLabel</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"hs_xchg"</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">pprWidth</span> <span class="n" style="color: #333;">w</span></span>
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111
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<pre style="margin: 0;">+<span id="LC111" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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112
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<pre style="margin: 0;">+<span id="LC112" class="line" lang="haskell"> <span class="n" style="color: #333;">pprWidth</span> <span class="kt" style="color: #458; font-weight: 600;">W8</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"8"</span></span>
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113
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<pre style="margin: 0;">+<span id="LC113" class="line" lang="haskell"> <span class="n" style="color: #333;">pprWidth</span> <span class="kt" style="color: #458; font-weight: 600;">W16</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"16"</span></span>
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114
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<pre style="margin: 0;">+<span id="LC114" class="line" lang="haskell"> <span class="n" style="color: #333;">pprWidth</span> <span class="kt" style="color: #458; font-weight: 600;">W32</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"32"</span></span>
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115
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<pre style="margin: 0;">+<span id="LC115" class="line" lang="haskell"> <span class="n" style="color: #333;">pprWidth</span> <span class="kt" style="color: #458; font-weight: 600;">W64</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"64"</span></span>
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116
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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"> <span class="n" style="color: #333;">pprWidth</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"xchgLabel: Unsupported word width "</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">w</span><span class="p">)</span></span>
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117
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<pre style="margin: 0;">+<span id="LC117" class="line" lang="haskell"></span>
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108
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<pre style="margin: 0;"> <span id="LC118" class="line" lang="haskell"><span class="n" style="color: #333;">cmpxchgLabel</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Width</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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109
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<pre style="margin: 0;"> <span id="LC119" class="line" lang="haskell"><span class="n" style="color: #333;">cmpxchgLabel</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"hs_cmpxchg"</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">pprWidth</span> <span class="n" style="color: #333;">w</span></span>
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110
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120
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<pre style="margin: 0;"> <span id="LC120" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#f71fa75baa7807186473f09c45a9ada1b72f4c6c"><strong>compiler/GHC/CmmToAsm/PPC/CodeGen.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2024,6 +2024,7 @@ genCCall' config gcp target dest_regs args</td>
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<pre style="margin: 0;"> <span id="LC2024" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Ctz</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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2025
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2025
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<pre style="margin: 0;"> <span id="LC2025" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRMW</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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2026
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2026
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<pre style="margin: 0;"> <span id="LC2026" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Cmpxchg</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">fsLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">cmpxchgLabel</span> <span class="n" style="color: #333;">w</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span></span>
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2027
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<pre style="margin: 0;">+<span id="LC2027" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">fsLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">xchgLabel</span> <span class="n" style="color: #333;">w</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span></span>
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2027
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2028
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<pre style="margin: 0;"> <span id="LC2028" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRead</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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2029
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<pre style="margin: 0;"> <span id="LC2029" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicWrite</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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2030
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<pre style="margin: 0;"> <span id="LC2030" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#e76eae04dea432f874db91c25e4a5725d7cc127b"><strong>compiler/GHC/CmmToAsm/SPARC/CodeGen.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -677,6 +677,7 @@ outOfLineMachOp_table mop</td>
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677
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<pre style="margin: 0;"> <span id="LC677" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Ctz</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fsLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">ctzLabel</span> <span class="n" style="color: #333;">w</span></span>
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678
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<pre style="margin: 0;"> <span id="LC678" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRMW</span> <span class="n" style="color: #333;">w</span> <span class="n" style="color: #333;">amop</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fsLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">atomicRMWLabel</span> <span class="n" style="color: #333;">w</span> <span class="n" style="color: #333;">amop</span></span>
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679
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679
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<pre style="margin: 0;"> <span id="LC679" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Cmpxchg</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fsLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">cmpxchgLabel</span> <span class="n" style="color: #333;">w</span></span>
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<pre style="margin: 0;">+<span id="LC680" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fsLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">xchgLabel</span> <span class="n" style="color: #333;">w</span></span>
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681
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<pre style="margin: 0;"> <span id="LC681" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRead</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fsLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">atomicReadLabel</span> <span class="n" style="color: #333;">w</span></span>
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<pre style="margin: 0;"> <span id="LC682" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicWrite</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fsLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">atomicWriteLabel</span> <span class="n" style="color: #333;">w</span></span>
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<pre style="margin: 0;"> <span id="LC683" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#2bae5947e9412f6deebf4db7dcb89d780913130f"><strong>compiler/GHC/CmmToAsm/X86/CodeGen.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2518,6 +2518,22 @@ genCCall' _ is32Bit (PrimTarget (MO_Cmpxchg width)) [dst] [addr, old, new] _ = d</td>
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<pre style="margin: 0;"> <span id="LC2518" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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2519
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<pre style="margin: 0;"> <span id="LC2519" class="line" lang="haskell"> <span class="n" style="color: #333;">format</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">intFormat</span> <span class="n" style="color: #333;">width</span></span>
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2520
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<pre style="margin: 0;"> <span id="LC2520" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC2521" class="line" lang="haskell"><span class="n" style="color: #333;">genCCall'</span> <span class="n" style="color: #333;">config</span> <span class="n" style="color: #333;">is32Bit</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PrimTarget</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="n" style="color: #333;">width</span><span class="p">))</span> <span class="p">[</span><span class="n" style="color: #333;">dst</span><span class="p">]</span> <span class="p">[</span><span class="n" style="color: #333;">addr</span><span class="p">,</span> <span class="n" style="color: #333;">value</span><span class="p">]</span> <span class="kr" style="font-weight: 600;">_</span></span>
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<pre style="margin: 0;">+<span id="LC2522" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">is32Bit</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">width</span> <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">W64</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"gencCall: 64bit atomic exchange not supported on 32bit platforms"</span></span>
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<pre style="margin: 0;">+<span id="LC2523" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC2524" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">dst_r</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getRegisterReg</span> <span class="n" style="color: #333;">platform</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CmmLocal</span> <span class="n" style="color: #333;">dst</span><span class="p">)</span></span>
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2525
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<pre style="margin: 0;">+<span id="LC2525" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Amode</span> <span class="n" style="color: #333;">amode</span> <span class="n" style="color: #333;">addr_code</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getSimpleAmode</span> <span class="n" style="color: #333;">is32Bit</span> <span class="n" style="color: #333;">addr</span></span>
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<pre style="margin: 0;">+<span id="LC2526" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">newval</span><span class="p">,</span> <span class="n" style="color: #333;">newval_code</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getSomeReg</span> <span class="n" style="color: #333;">value</span></span>
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2527
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<pre style="margin: 0;">+<span id="LC2527" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Copy the value into the target register, perform the exchange.</span></span>
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2528
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<pre style="margin: 0;">+<span id="LC2528" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">code</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">toOL</span></span>
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2529
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<pre style="margin: 0;">+<span id="LC2529" class="line" lang="haskell"> <span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">MOV</span> <span class="n" style="color: #333;">format</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpReg</span> <span class="n" style="color: #333;">newval</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpReg</span> <span class="n" style="color: #333;">dst_r</span><span class="p">)</span></span>
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2530
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<pre style="margin: 0;">+<span id="LC2530" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">XCHG</span> <span class="n" style="color: #333;">format</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpAddr</span> <span class="n" style="color: #333;">amode</span><span class="p">)</span> <span class="n" style="color: #333;">dst_r</span></span>
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2531
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<pre style="margin: 0;">+<span id="LC2531" class="line" lang="haskell"> <span class="p">]</span></span>
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2532
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<pre style="margin: 0;">+<span id="LC2532" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">addr_code</span> <span class="p">`</span><span class="n" style="color: #333;">appOL</span><span class="p">`</span> <span class="n" style="color: #333;">newval_code</span> <span class="p">`</span><span class="n" style="color: #333;">appOL</span><span class="p">`</span> <span class="n" style="color: #333;">code</span></span>
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2533
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<pre style="margin: 0;">+<span id="LC2533" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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2534
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<pre style="margin: 0;">+<span id="LC2534" class="line" lang="haskell"> <span class="n" style="color: #333;">format</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">intFormat</span> <span class="n" style="color: #333;">width</span></span>
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2535
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<pre style="margin: 0;">+<span id="LC2535" class="line" lang="haskell"> <span class="n" style="color: #333;">platform</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ncgPlatform</span> <span class="n" style="color: #333;">config</span></span>
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2536
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<pre style="margin: 0;">+<span id="LC2536" class="line" lang="haskell"></span>
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2521
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2537
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<pre style="margin: 0;"> <span id="LC2537" class="line" lang="haskell"><span class="n" style="color: #333;">genCCall'</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">is32Bit</span> <span class="n" style="color: #333;">target</span> <span class="n" style="color: #333;">dest_regs</span> <span class="n" style="color: #333;">args</span> <span class="n" style="color: #333;">bid</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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2522
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2538
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<pre style="margin: 0;"> <span id="LC2538" class="line" lang="haskell"> <span class="n" style="color: #333;">platform</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ncgPlatform</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">getConfig</span></span>
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2523
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2539
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<pre style="margin: 0;"> <span id="LC2539" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="p">(</span><span class="n" style="color: #333;">target</span><span class="p">,</span> <span class="n" style="color: #333;">dest_regs</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3213,6 +3229,7 @@ outOfLineCmmOp bid mop res args</td>
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3213
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3229
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<pre style="margin: 0;"> <span id="LC3229" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRead</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fsLit</span> <span class="s" style="color: #d14;">"atomicread"</span></span>
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3214
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3230
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<pre style="margin: 0;"> <span id="LC3230" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicWrite</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fsLit</span> <span class="s" style="color: #d14;">"atomicwrite"</span></span>
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3215
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3231
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<pre style="margin: 0;"> <span id="LC3231" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Cmpxchg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fsLit</span> <span class="s" style="color: #d14;">"cmpxchg"</span></span>
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3232
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<pre style="margin: 0;">+<span id="LC3232" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">should_be_inline</span></span>
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3216
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3233
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<pre style="margin: 0;"> <span id="LC3233" class="line" lang="haskell"></span>
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3217
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3234
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<pre style="margin: 0;"> <span id="LC3234" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_UF_Conv</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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3218
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3235
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<pre style="margin: 0;"> <span id="LC3235" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3232,6 +3249,11 @@ outOfLineCmmOp bid mop res args</td>
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3232
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3249
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<pre style="margin: 0;"> <span id="LC3249" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_Prefetch_Data</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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3233
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3250
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<pre style="margin: 0;"> <span id="LC3250" class="line" lang="haskell"> <span class="n" style="color: #333;">unsupported</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="p">(</span><span class="s" style="color: #d14;">"outOfLineCmmOp: "</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">mop</span></span>
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3234
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<td class="diff-line-num new_line" data-linenumber="3251" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
3251
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<pre style="margin: 0;"> <span id="LC3251" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">++</span> <span class="s" style="color: #d14;">" not supported here"</span><span class="p">)</span></span>
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3252
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<pre style="margin: 0;">+<span id="LC3252" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If we generate a call for the given primop</span></span>
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3253
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<pre style="margin: 0;">+<span id="LC3253" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- something went wrong.</span></span>
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3254
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<pre style="margin: 0;">+<span id="LC3254" class="line" lang="haskell"> <span class="n" style="color: #333;">should_be_inline</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="p">(</span><span class="s" style="color: #d14;">"outOfLineCmmOp: "</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">mop</span></span>
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3255
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<pre style="margin: 0;">+<span id="LC3255" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">++</span> <span class="s" style="color: #d14;">" should be handled inline"</span><span class="p">)</span></span>
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3256
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<pre style="margin: 0;">+<span id="LC3256" class="line" lang="haskell"></span>
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3235
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3257
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<pre style="margin: 0;"> <span id="LC3257" class="line" lang="haskell"></span>
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3236
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3258
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<pre style="margin: 0;"> <span id="LC3258" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- -----------------------------------------------------------------------------</span></span>
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3237
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3259
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<pre style="margin: 0;"> <span id="LC3259" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Generating a table-branch</span></span>
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<li id="7b360ca84c1b9aaecc0f9de207a7698dc36514fe">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#7b360ca84c1b9aaecc0f9de207a7698dc36514fe"><strong>compiler/GHC/CmmToAsm/X86/Instr.hs</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="329" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -329,6 +329,7 @@ data Instr</td>
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329
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329
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<pre style="margin: 0;"> <span id="LC329" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">LOCK</span> <span class="kt" style="color: #458; font-weight: 600;">Instr</span> <span class="c1" style="color: #998; font-style: italic;">-- lock prefix</span></span>
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330
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<pre style="margin: 0;"> <span id="LC330" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">XADD</span> <span class="kt" style="color: #458; font-weight: 600;">Format</span> <span class="kt" style="color: #458; font-weight: 600;">Operand</span> <span class="kt" style="color: #458; font-weight: 600;">Operand</span> <span class="c1" style="color: #998; font-style: italic;">-- src (r), dst (r/m)</span></span>
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331
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331
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<pre style="margin: 0;"> <span id="LC331" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">CMPXCHG</span> <span class="kt" style="color: #458; font-weight: 600;">Format</span> <span class="kt" style="color: #458; font-weight: 600;">Operand</span> <span class="kt" style="color: #458; font-weight: 600;">Operand</span> <span class="c1" style="color: #998; font-style: italic;">-- src (r), dst (r/m), eax implicit</span></span>
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<pre style="margin: 0;">+<span id="LC332" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">XCHG</span> <span class="kt" style="color: #458; font-weight: 600;">Format</span> <span class="kt" style="color: #458; font-weight: 600;">Operand</span> <span class="kt" style="color: #458; font-weight: 600;">Reg</span> <span class="c1" style="color: #998; font-style: italic;">-- src (r/m), dst (r/m)</span></span>
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332
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333
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<pre style="margin: 0;"> <span id="LC333" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MFENCE</span></span>
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333
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334
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<pre style="margin: 0;"> <span id="LC334" class="line" lang="haskell"></span>
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334
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<pre style="margin: 0;"> <span id="LC335" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">PrefetchVariant</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NTA</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Lvl0</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Lvl1</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Lvl2</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -431,6 +432,7 @@ x86_regUsageOfInstr platform instr</td>
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431
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<pre style="margin: 0;"> <span id="LC432" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">LOCK</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">x86_regUsageOfInstr</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">i</span></span>
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432
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433
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<pre style="margin: 0;"> <span id="LC433" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">XADD</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">usageMM</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span></span>
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433
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434
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<pre style="margin: 0;"> <span id="LC434" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">CMPXCHG</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">usageRMM</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpReg</span> <span class="n" style="color: #333;">eax</span><span class="p">)</span></span>
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435
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<pre style="margin: 0;">+<span id="LC435" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">XCHG</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">usageMM</span> <span class="n" style="color: #333;">src</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpReg</span> <span class="n" style="color: #333;">dst</span><span class="p">)</span></span>
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434
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436
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<pre style="margin: 0;"> <span id="LC436" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MFENCE</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">noUsage</span></span>
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435
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437
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<pre style="margin: 0;"> <span id="LC437" class="line" lang="haskell"></span>
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438
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<pre style="margin: 0;"> <span id="LC438" class="line" lang="haskell"> <span class="n" style="color: #333;">_other</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"regUsage: unrecognised instr"</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="462" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -460,6 +462,7 @@ x86_regUsageOfInstr platform instr</td>
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460
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462
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<pre style="margin: 0;"> <span id="LC462" class="line" lang="haskell"> <span class="n" style="color: #333;">usageMM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Operand</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Operand</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RegUsage</span></span>
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461
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463
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<pre style="margin: 0;"> <span id="LC463" class="line" lang="haskell"> <span class="n" style="color: #333;">usageMM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpReg</span> <span class="n" style="color: #333;">src</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpReg</span> <span class="n" style="color: #333;">dst</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkRU</span> <span class="p">[</span><span class="n" style="color: #333;">src</span><span class="p">,</span> <span class="n" style="color: #333;">dst</span><span class="p">]</span> <span class="p">[</span><span class="n" style="color: #333;">src</span><span class="p">,</span> <span class="n" style="color: #333;">dst</span><span class="p">]</span></span>
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462
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464
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<pre style="margin: 0;"> <span id="LC464" class="line" lang="haskell"> <span class="n" style="color: #333;">usageMM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpReg</span> <span class="n" style="color: #333;">src</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpAddr</span> <span class="n" style="color: #333;">ea</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkRU</span> <span class="p">(</span><span class="n" style="color: #333;">use_EA</span> <span class="n" style="color: #333;">ea</span> <span class="p">[</span><span class="n" style="color: #333;">src</span><span class="p">])</span> <span class="p">[</span><span class="n" style="color: #333;">src</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC465" class="line" lang="haskell"> <span class="n" style="color: #333;">usageMM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpAddr</span> <span class="n" style="color: #333;">ea</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpReg</span> <span class="n" style="color: #333;">dst</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkRU</span> <span class="p">(</span><span class="n" style="color: #333;">use_EA</span> <span class="n" style="color: #333;">ea</span> <span class="p">[</span><span class="n" style="color: #333;">dst</span><span class="p">])</span> <span class="p">[</span><span class="n" style="color: #333;">dst</span><span class="p">]</span></span>
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463
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<pre style="margin: 0;"> <span id="LC466" class="line" lang="haskell"> <span class="n" style="color: #333;">usageMM</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"X86.RegInfo.usageMM: no match"</span></span>
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467
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<pre style="margin: 0;"> <span id="LC467" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC468" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- 3 operand form; first operand Read; second Modified; third Modified</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="589" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="592" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -589,6 +592,7 @@ x86_patchRegsOfInstr instr env</td>
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589
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592
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<pre style="margin: 0;"> <span id="LC592" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">LOCK</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LOCK</span> <span class="p">(</span><span class="n" style="color: #333;">x86_patchRegsOfInstr</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">env</span><span class="p">)</span></span>
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590
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593
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<pre style="margin: 0;"> <span id="LC593" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">XADD</span> <span class="n" style="color: #333;">fmt</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">patch2</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XADD</span> <span class="n" style="color: #333;">fmt</span><span class="p">)</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span></span>
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591
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594
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<pre style="margin: 0;"> <span id="LC594" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">CMPXCHG</span> <span class="n" style="color: #333;">fmt</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">patch2</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CMPXCHG</span> <span class="n" style="color: #333;">fmt</span><span class="p">)</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span></span>
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<pre style="margin: 0;">+<span id="LC595" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">XCHG</span> <span class="n" style="color: #333;">fmt</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">dst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">XCHG</span> <span class="n" style="color: #333;">fmt</span> <span class="p">(</span><span class="n" style="color: #333;">patchOp</span> <span class="n" style="color: #333;">src</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dst</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC596" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MFENCE</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">instr</span></span>
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597
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<pre style="margin: 0;"> <span id="LC597" class="line" lang="haskell"></span>
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598
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<pre style="margin: 0;"> <span id="LC598" class="line" lang="haskell"> <span class="n" style="color: #333;">_other</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"patchRegs: unrecognised instr"</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#335d279236d65dcf13f2bab3891e515cb803203c"><strong>compiler/GHC/CmmToAsm/X86/Ppr.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -824,6 +824,9 @@ pprInstr platform i = case i of</td>
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824
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<pre style="margin: 0;"> <span id="LC824" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">SETCC</span> <span class="n" style="color: #333;">cond</span> <span class="n" style="color: #333;">op</span></span>
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825
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<pre style="margin: 0;"> <span id="LC825" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pprCondInstr</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="s" style="color: #d14;">"set"</span><span class="p">)</span> <span class="n" style="color: #333;">cond</span> <span class="p">(</span><span class="n" style="color: #333;">pprOperand</span> <span class="n" style="color: #333;">platform</span> <span class="kt" style="color: #458; font-weight: 600;">II8</span> <span class="n" style="color: #333;">op</span><span class="p">)</span></span>
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826
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<pre style="margin: 0;"> <span id="LC826" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC827" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">XCHG</span> <span class="n" style="color: #333;">format</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">val</span></span>
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<pre style="margin: 0;">+<span id="LC828" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pprFormatOpReg</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="s" style="color: #d14;">"xchg"</span><span class="p">)</span> <span class="n" style="color: #333;">format</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">val</span></span>
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<pre style="margin: 0;">+<span id="LC829" class="line" lang="haskell"></span>
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830
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<pre style="margin: 0;"> <span id="LC830" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">JXX</span> <span class="n" style="color: #333;">cond</span> <span class="n" style="color: #333;">blockid</span></span>
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828
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<pre style="margin: 0;"> <span id="LC831" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pprCondInstr</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="s" style="color: #d14;">"j"</span><span class="p">)</span> <span class="n" style="color: #333;">cond</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lab</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC832" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">lab</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">blockLbl</span> <span class="n" style="color: #333;">blockid</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#76664ab267df4fc0bec2465efd78bf0afacfe3a7"><strong>compiler/GHC/CmmToC.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -831,6 +831,7 @@ pprCallishMachOp_for_C mop</td>
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<pre style="margin: 0;"> <span id="LC831" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_Ctz</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ptext</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">ctzLabel</span> <span class="n" style="color: #333;">w</span><span class="p">)</span></span>
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832
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<pre style="margin: 0;"> <span id="LC832" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRMW</span> <span class="n" style="color: #333;">w</span> <span class="n" style="color: #333;">amop</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ptext</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">atomicRMWLabel</span> <span class="n" style="color: #333;">w</span> <span class="n" style="color: #333;">amop</span><span class="p">)</span></span>
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833
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<pre style="margin: 0;"> <span id="LC833" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_Cmpxchg</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ptext</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">cmpxchgLabel</span> <span class="n" style="color: #333;">w</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC834" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ptext</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">xchgLabel</span> <span class="n" style="color: #333;">w</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC835" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRead</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ptext</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">atomicReadLabel</span> <span class="n" style="color: #333;">w</span><span class="p">)</span></span>
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835
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836
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<pre style="margin: 0;"> <span id="LC836" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_AtomicWrite</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ptext</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">atomicWriteLabel</span> <span class="n" style="color: #333;">w</span><span class="p">)</span></span>
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837
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<pre style="margin: 0;"> <span id="LC837" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_UF_Conv</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ptext</span> <span class="p">(</span><span class="n" style="color: #333;">sLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">word2FloatLabel</span> <span class="n" style="color: #333;">w</span><span class="p">)</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#a49dbda5c8a9c380f638f55cf5ade791db0017cc"><strong>compiler/GHC/CmmToLlvm/CodeGen.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -281,6 +281,14 @@ genCall (PrimTarget (MO_Cmpxchg _width))</td>
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<pre style="margin: 0;"> <span id="LC281" class="line" lang="haskell"> <span class="n" style="color: #333;">retVar'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">doExprW</span> <span class="n" style="color: #333;">targetTy</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">ExtractV</span> <span class="n" style="color: #333;">retVar</span> <span class="mi" style="color: #099;">0</span></span>
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282
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282
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<pre style="margin: 0;"> <span id="LC282" class="line" lang="haskell"> <span class="n" style="color: #333;">statement</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">Store</span> <span class="n" style="color: #333;">retVar'</span> <span class="n" style="color: #333;">dstVar</span></span>
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283
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<pre style="margin: 0;"> <span id="LC283" class="line" lang="haskell"></span>
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284
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<pre style="margin: 0;">+<span id="LC284" class="line" lang="haskell"><span class="n" style="color: #333;">genCall</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PrimTarget</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="n" style="color: #333;">_width</span><span class="p">))</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="p">[</span><span class="n" style="color: #333;">addr</span><span class="p">,</span> <span class="n" style="color: #333;">val</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">runStmtsDecls</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC285" class="line" lang="haskell"> <span class="n" style="color: #333;">addrVar</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">exprToVarW</span> <span class="n" style="color: #333;">addr</span></span>
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<pre style="margin: 0;">+<span id="LC286" class="line" lang="haskell"> <span class="n" style="color: #333;">valVar</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">exprToVarW</span> <span class="n" style="color: #333;">val</span></span>
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287
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<pre style="margin: 0;">+<span id="LC287" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ptrTy</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pLift</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">getVarType</span> <span class="n" style="color: #333;">valVar</span></span>
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<pre style="margin: 0;">+<span id="LC288" class="line" lang="haskell"> <span class="n" style="color: #333;">ptrExpr</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="kt" style="color: #458; font-weight: 600;">LM_Inttoptr</span> <span class="n" style="color: #333;">addrVar</span> <span class="n" style="color: #333;">ptrTy</span></span>
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289
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<pre style="margin: 0;">+<span id="LC289" class="line" lang="haskell"> <span class="n" style="color: #333;">ptrVar</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">doExprW</span> <span class="n" style="color: #333;">ptrTy</span> <span class="n" style="color: #333;">ptrExpr</span></span>
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290
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<pre style="margin: 0;">+<span id="LC290" class="line" lang="haskell"> <span class="n" style="color: #333;">statement</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">Expr</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">AtomicRMW</span> <span class="kt" style="color: #458; font-weight: 600;">LAO_Xchg</span> <span class="n" style="color: #333;">ptrVar</span> <span class="n" style="color: #333;">valVar</span> <span class="kt" style="color: #458; font-weight: 600;">SyncSeqCst</span></span>
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<pre style="margin: 0;">+<span id="LC291" class="line" lang="haskell"></span>
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292
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<pre style="margin: 0;"> <span id="LC292" class="line" lang="haskell"><span class="n" style="color: #333;">genCall</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PrimTarget</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_AtomicWrite</span> <span class="n" style="color: #333;">_width</span><span class="p">))</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="p">[</span><span class="n" style="color: #333;">addr</span><span class="p">,</span> <span class="n" style="color: #333;">val</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">runStmtsDecls</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;"> <span id="LC293" class="line" lang="haskell"> <span class="n" style="color: #333;">addrVar</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">exprToVarW</span> <span class="n" style="color: #333;">addr</span></span>
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<pre style="margin: 0;"> <span id="LC294" class="line" lang="haskell"> <span class="n" style="color: #333;">valVar</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">exprToVarW</span> <span class="n" style="color: #333;">val</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="864" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -856,6 +864,7 @@ cmmPrimOpFunctions mop = do</td>
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856
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<pre style="margin: 0;"> <span id="LC864" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRMW</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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857
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865
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<pre style="margin: 0;"> <span id="LC865" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_AtomicWrite</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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858
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866
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<pre style="margin: 0;"> <span id="LC866" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Cmpxchg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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867
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<pre style="margin: 0;">+<span id="LC867" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unsupported</span></span>
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859
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868
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<pre style="margin: 0;"> <span id="LC868" class="line" lang="haskell"></span>
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860
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869
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<pre style="margin: 0;"> <span id="LC869" class="line" lang="haskell"><span class="cd">-- | Tail function calls</span></span>
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861
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870
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<pre style="margin: 0;"> <span id="LC870" class="line" lang="haskell"><span class="n" style="color: #333;">genJump</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CmmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">GlobalReg</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LlvmM</span> <span class="kt" style="color: #458; font-weight: 600;">StmtData</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#d12a108e34fe83acc9c99357ae841e22a0af0a23"><strong>compiler/GHC/StgToCmm/Prim.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -856,6 +856,12 @@ emitPrimOp dflags = \case</td>
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856
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856
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<pre style="margin: 0;"> <span id="LC856" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Word2DoubleOp</span> <span class="o" style="font-weight: 600;">-></span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">w</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">opAllDone</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">res</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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857
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857
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<pre style="margin: 0;"> <span id="LC857" class="line" lang="haskell"> <span class="n" style="color: #333;">emitPrimCall</span> <span class="p">[</span><span class="n" style="color: #333;">res</span><span class="p">]</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_UF_Conv</span> <span class="kt" style="color: #458; font-weight: 600;">W64</span><span class="p">)</span> <span class="p">[</span><span class="n" style="color: #333;">w</span><span class="p">]</span></span>
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858
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858
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<pre style="margin: 0;"> <span id="LC858" class="line" lang="haskell"></span>
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859
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<pre style="margin: 0;">+<span id="LC859" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Atomic operations</span></span>
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<pre style="margin: 0;">+<span id="LC860" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">InterlockedExchange_Addr</span> <span class="o" style="font-weight: 600;">-></span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">src</span><span class="p">,</span> <span class="n" style="color: #333;">value</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">opAllDone</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">res</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">+<span id="LC861" class="line" lang="haskell"> <span class="n" style="color: #333;">emitPrimCall</span> <span class="p">[</span><span class="n" style="color: #333;">res</span><span class="p">]</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="p">(</span><span class="n" style="color: #333;">wordWidth</span> <span class="n" style="color: #333;">platform</span><span class="p">))</span> <span class="p">[</span><span class="n" style="color: #333;">src</span><span class="p">,</span> <span class="n" style="color: #333;">value</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC862" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">InterlockedExchange_Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">src</span><span class="p">,</span> <span class="n" style="color: #333;">value</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">opAllDone</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">res</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">+<span id="LC863" class="line" lang="haskell"> <span class="n" style="color: #333;">emitPrimCall</span> <span class="p">[</span><span class="n" style="color: #333;">res</span><span class="p">]</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_Xchg</span> <span class="p">(</span><span class="n" style="color: #333;">wordWidth</span> <span class="n" style="color: #333;">platform</span><span class="p">))</span> <span class="p">[</span><span class="n" style="color: #333;">src</span><span class="p">,</span> <span class="n" style="color: #333;">value</span><span class="p">]</span></span>
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864
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<pre style="margin: 0;">+<span id="LC864" class="line" lang="haskell"></span>
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865
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<pre style="margin: 0;"> <span id="LC865" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- SIMD primops</span></span>
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860
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866
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<pre style="margin: 0;"> <span id="LC866" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VecBroadcastOp</span> <span class="n" style="color: #333;">vcat</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">e</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">opAllDone</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">res</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;"> <span id="LC867" class="line" lang="haskell"> <span class="n" style="color: #333;">checkVecCompatibility</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">vcat</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">w</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#87db583be5c13c1f7b3c958b10e03d67b6a2ca06"><strong>configure.ac</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -730,6 +730,8 @@ dnl unregisterised, Sparc, and PPC backends.</td>
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<pre style="margin: 0;"> <span id="LC730" class="line" lang="plaintext">FP_GCC_SUPPORTS__ATOMICS</span>
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731
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<pre style="margin: 0;"> <span id="LC731" class="line" lang="plaintext">if test $CONF_GCC_SUPPORTS__ATOMICS = YES ; then</span>
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732
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<pre style="margin: 0;"> <span id="LC732" class="line" lang="plaintext"> AC_DEFINE([HAVE_C11_ATOMICS], [1], [Does GCC support __atomic primitives?])</span>
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<pre style="margin: 0;">+<span id="LC733" class="line" lang="plaintext">else</span>
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<pre style="margin: 0;">+<span id="LC734" class="line" lang="plaintext"> AC_MSG_ERROR([C compiler needs to support __atomic primitives.])</span>
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735
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<pre style="margin: 0;"> <span id="LC735" class="line" lang="plaintext">fi</span>
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736
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<pre style="margin: 0;"> <span id="LC736" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC737" class="line" lang="plaintext">FP_GCC_EXTRA_FLAGS</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#b421960e854c6cfa1e4ca830bd6a5fc6eef91168"><strong>docs/users_guide/8.12.1-notes.rst</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -148,11 +148,11 @@ Arrow notation</td>
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<pre style="margin: 0;"> <span id="LC148" class="line" lang="plaintext"> ``hsGroupTopLevelFixitySigs`` function, which collects all top-level fixity</span>
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<pre style="margin: 0;"> <span id="LC149" class="line" lang="plaintext"> signatures, including those for class methods defined inside classes.</span>
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<pre style="margin: 0;"> <span id="LC150" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">-<span id="LC151" class="line" lang="plaintext">- The ``Exception`` module was boiled down acknowledging the existence of<span class="idiff left right"> </span></span>
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<pre style="margin: 0;">+<span id="LC151" class="line" lang="plaintext">- The ``Exception`` module was boiled down acknowledging the existence of</span>
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<pre style="margin: 0;"> <span id="LC152" class="line" lang="plaintext"> the ``exceptions`` dependency. In particular, the ``ExceptionMonad``</span>
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<pre style="margin: 0;"> <span id="LC153" class="line" lang="plaintext"> class is not a proper class anymore, but a mere synonym for ``MonadThrow``,</span>
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<pre style="margin: 0;">-<span id="LC154" class="line" lang="plaintext"> ``MonadCatch``, ``MonadMask`` (all from ``exceptions``) and ``MonadIO``.<span class="idiff left right"> </span></span>
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<pre style="margin: 0;">-<span id="LC155" class="line" lang="plaintext"> All of ``g*``-functions from the module (``gtry``, ``gcatch``, etc.) are<span class="idiff left right"> </span></span>
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<pre style="margin: 0;">+<span id="LC154" class="line" lang="plaintext"> ``MonadCatch``, ``MonadMask`` (all from ``exceptions``) and ``MonadIO``.</span>
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<pre style="margin: 0;">+<span id="LC155" class="line" lang="plaintext"> All of ``g*``-functions from the module (``gtry``, ``gcatch``, etc.) are</span>
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156
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<pre style="margin: 0;"> <span id="LC156" class="line" lang="plaintext"> erased, and their ``exceptions``-alternatives are meant to be used in the</span>
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157
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<pre style="margin: 0;"> <span id="LC157" class="line" lang="plaintext"> GHC code instead.</span>
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<pre style="margin: 0;"> <span id="LC158" class="line" lang="plaintext"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -162,6 +162,12 @@ Arrow notation</td>
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<pre style="margin: 0;"> <span id="LC162" class="line" lang="plaintext">Build system</span>
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<pre style="margin: 0;"> <span id="LC163" class="line" lang="plaintext">~~~~~~~~~~~~</span>
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<pre style="margin: 0;"> <span id="LC164" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC165" class="line" lang="plaintext">Bootstrapping requirements</span>
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<pre style="margin: 0;">+<span id="LC166" class="line" lang="plaintext">------------------</span>
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<pre style="margin: 0;">+<span id="LC168" class="line" lang="plaintext">Starting with 8.12.1 GHC requires a C compiler which supports</span>
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<pre style="margin: 0;">+<span id="LC169" class="line" lang="plaintext">__atomic_op_n builtins. This raises the requirement for GCC to 4.7.</span>
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<pre style="margin: 0;"> <span id="LC171" class="line" lang="plaintext">Included libraries</span>
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<pre style="margin: 0;"> <span id="LC172" class="line" lang="plaintext">------------------</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#ccd32698c1d6d80e18d4e38a453603292e206906"><strong>includes/stg/Prim.h</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -50,6 +50,10 @@ void hs_atomicwrite8(StgWord x, StgWord val);</td>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="nf" style="color: #900; font-weight: 600;">hs_atomicwrite16</span><span class="p">(</span><span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="nf" style="color: #900; font-weight: 600;">hs_atomicwrite32</span><span class="p">(</span><span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="nf" style="color: #900; font-weight: 600;">hs_atomicwrite64</span><span class="p">(</span><span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord64</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC53" class="line" lang="c"><span class="n" style="color: #333;">StgWord</span> <span class="nf" style="color: #900; font-weight: 600;">hs_xchg8</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC54" class="line" lang="c"><span class="n" style="color: #333;">StgWord</span> <span class="nf" style="color: #900; font-weight: 600;">hs_xchg16</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC55" class="line" lang="c"><span class="n" style="color: #333;">StgWord</span> <span class="nf" style="color: #900; font-weight: 600;">hs_xchg32</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC56" class="line" lang="c"><span class="n" style="color: #333;">StgWord</span> <span class="nf" style="color: #900; font-weight: 600;">hs_xchg64</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC57" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* libraries/ghc-prim/cbits/bswap.c */</span></span>
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<pre style="margin: 0;"> <span id="LC59" class="line" lang="c"><span class="n" style="color: #333;">StgWord16</span> <span class="nf" style="color: #900; font-weight: 600;">hs_bswap16</span><span class="p">(</span><span class="n" style="color: #333;">StgWord16</span> <span class="n" style="color: #333;">x</span><span class="p">);</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#2d838bb8165073c4e5672387ae3340ad8d483b01"><strong>libraries/base/GHC/Ptr.hs</strong></a>
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<pre style="margin: 0;"> <span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE Unsafe #-}</span></span>
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<pre style="margin: 0;"> <span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP, NoImplicitPrelude, MagicHash, RoleAnnotations #-}</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE UnboxedTuples #-}</span></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# OPTIONS_HADDOCK not-home #-}</span></span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC6" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------------------------------------------</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -22,7 +23,10 @@ module GHC.Ptr (</td>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nullFunPtr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">castFunPtr</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Unsafe functions</span></span>
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<pre style="margin: 0;">-<span id="LC25" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">castFunPtrToPtr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">castPtrToFunPtr</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">castFunPtrToPtr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">castPtrToFunPtr</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Atomic operations</span></span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">exchangePtr</span></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"> <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Base</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -162,6 +166,15 @@ castFunPtrToPtr (FunPtr addr) = Ptr addr</td>
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<pre style="margin: 0;"> <span id="LC166" class="line" lang="haskell"><span class="n" style="color: #333;">castPtrToFunPtr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FunPtr</span> <span class="n" style="color: #333;">b</span></span>
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<pre style="margin: 0;"> <span id="LC167" class="line" lang="haskell"><span class="n" style="color: #333;">castPtrToFunPtr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">addr</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FunPtr</span> <span class="n" style="color: #333;">addr</span></span>
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<pre style="margin: 0;"> <span id="LC168" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC169" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------------------------------------------</span></span>
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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Atomic operations for Ptr</span></span>
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<pre style="margin: 0;">+<span id="LC171" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE exchangePtr #-}</span></span>
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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell"><span class="n" style="color: #333;">exchangePtr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">c</span><span class="p">)</span></span>
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174
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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell"><span class="n" style="color: #333;">exchangePtr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">dst</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">val</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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175
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<pre style="margin: 0;">+<span id="LC175" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span></span>
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176
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<pre style="margin: 0;">+<span id="LC176" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="p">(</span><span class="n" style="color: #333;">interlockedExchangeAddr</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">dst</span> <span class="n" style="color: #333;">val</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>
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177
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<pre style="margin: 0;">+<span id="LC177" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">s2</span><span class="p">,</span> <span class="n" style="color: #333;">old_val</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">s2</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">old_val</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>
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165
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178
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<pre style="margin: 0;"> <span id="LC178" class="line" lang="haskell"></span>
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166
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179
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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------------------------------------------</span></span>
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167
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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Show instances for Ptr and FunPtr</span></span>
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<li id="786d2d970e91533a64e0123b52368c3ec897ed39">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#786d2d970e91533a64e0123b52368c3ec897ed39"><strong>libraries/ghc-prim/cbits/atomic.c</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -318,6 +318,39 @@ hs_cmpxchg64(StgWord x, StgWord64 old, StgWord64 new)</td>
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318
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318
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<pre style="margin: 0;"> <span id="LC318" class="line" lang="c"><span class="p">}</span></span>
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319
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<pre style="margin: 0;"> <span id="LC319" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#endif</span></span>
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320
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<pre style="margin: 0;"> <span id="LC320" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC321" class="line" lang="c"><span class="c1" style="color: #998; font-style: italic;">// Atomic exchange operations</span></span>
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<pre style="margin: 0;">+<span id="LC322" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC323" class="line" lang="c"><span class="k" style="font-weight: 600;">extern</span> <span class="n" style="color: #333;">StgWord</span> <span class="nf" style="color: #900; font-weight: 600;">hs_xchg8</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC324" class="line" lang="c"><span class="n" style="color: #333;">StgWord</span></span>
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<pre style="margin: 0;">+<span id="LC325" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">hs_xchg8</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">)</span></span>
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326
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<pre style="margin: 0;">+<span id="LC326" class="line" lang="c"><span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC327" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="p">(</span><span class="n" style="color: #333;">StgWord</span><span class="p">)</span> <span class="n" style="color: #333;">__atomic_exchange_1</span><span class="p">((</span><span class="k" style="font-weight: 600;">volatile</span> <span class="n" style="color: #333;">StgPtr</span><span class="p">)</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">val</span><span class="p">,</span> <span class="n" style="color: #333;">__ATOMIC_SEQ_CST</span><span class="p">);</span></span>
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328
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<pre style="margin: 0;">+<span id="LC328" class="line" lang="c"><span class="p">}</span></span>
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329
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<pre style="margin: 0;">+<span id="LC329" class="line" lang="c"></span>
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330
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<pre style="margin: 0;">+<span id="LC330" class="line" lang="c"><span class="k" style="font-weight: 600;">extern</span> <span class="n" style="color: #333;">StgWord</span> <span class="nf" style="color: #900; font-weight: 600;">hs_xchg16</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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331
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<pre style="margin: 0;">+<span id="LC331" class="line" lang="c"><span class="n" style="color: #333;">StgWord</span></span>
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332
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<pre style="margin: 0;">+<span id="LC332" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">hs_xchg16</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">)</span></span>
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333
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<pre style="margin: 0;">+<span id="LC333" class="line" lang="c"><span class="p">{</span></span>
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334
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<pre style="margin: 0;">+<span id="LC334" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="p">(</span><span class="n" style="color: #333;">StgWord</span><span class="p">)</span> <span class="n" style="color: #333;">__atomic_exchange_2</span><span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">val</span><span class="p">,</span> <span class="n" style="color: #333;">__ATOMIC_SEQ_CST</span><span class="p">);</span></span>
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335
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<pre style="margin: 0;">+<span id="LC335" class="line" lang="c"><span class="p">}</span></span>
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336
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<pre style="margin: 0;">+<span id="LC336" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC337" class="line" lang="c"><span class="k" style="font-weight: 600;">extern</span> <span class="n" style="color: #333;">StgWord</span> <span class="nf" style="color: #900; font-weight: 600;">hs_xchg32</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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338
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<pre style="margin: 0;">+<span id="LC338" class="line" lang="c"><span class="n" style="color: #333;">StgWord</span></span>
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339
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<pre style="margin: 0;">+<span id="LC339" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">hs_xchg32</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">)</span></span>
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340
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<pre style="margin: 0;">+<span id="LC340" class="line" lang="c"><span class="p">{</span></span>
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341
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<pre style="margin: 0;">+<span id="LC341" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="p">(</span><span class="n" style="color: #333;">StgWord</span><span class="p">)</span> <span class="n" style="color: #333;">__atomic_exchange_4</span><span class="p">((</span><span class="k" style="font-weight: 600;">volatile</span> <span class="n" style="color: #333;">StgPtr</span><span class="p">)</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">val</span><span class="p">,</span> <span class="n" style="color: #333;">__ATOMIC_SEQ_CST</span><span class="p">);</span></span>
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342
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<pre style="margin: 0;">+<span id="LC342" class="line" lang="c"><span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC343" class="line" lang="c"></span>
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344
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<pre style="margin: 0;">+<span id="LC344" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#if WORD_SIZE_IN_BITS == 64</span></span>
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345
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<pre style="margin: 0;">+<span id="LC345" class="line" lang="c"><span class="c1" style="color: #998; font-style: italic;">//GCC provides this even on 32bit, but StgWord is still 32 bits.</span></span>
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346
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<pre style="margin: 0;">+<span id="LC346" class="line" lang="c"><span class="k" style="font-weight: 600;">extern</span> <span class="n" style="color: #333;">StgWord</span> <span class="nf" style="color: #900; font-weight: 600;">hs_xchg64</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">);</span></span>
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347
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<pre style="margin: 0;">+<span id="LC347" class="line" lang="c"><span class="n" style="color: #333;">StgWord</span></span>
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<pre style="margin: 0;">+<span id="LC348" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">hs_xchg64</span><span class="p">(</span><span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">val</span><span class="p">)</span></span>
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349
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<pre style="margin: 0;">+<span id="LC349" class="line" lang="c"><span class="p">{</span></span>
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350
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<pre style="margin: 0;">+<span id="LC350" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="p">(</span><span class="n" style="color: #333;">StgWord</span><span class="p">)</span> <span class="n" style="color: #333;">__atomic_exchange_8</span><span class="p">((</span><span class="k" style="font-weight: 600;">volatile</span> <span class="n" style="color: #333;">StgPtr</span><span class="p">)</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">val</span><span class="p">,</span> <span class="n" style="color: #333;">__ATOMIC_SEQ_CST</span><span class="p">);</span></span>
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351
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<pre style="margin: 0;">+<span id="LC351" class="line" lang="c"><span class="p">}</span></span>
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352
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<pre style="margin: 0;">+<span id="LC352" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#endif</span></span>
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353
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<pre style="margin: 0;">+<span id="LC353" class="line" lang="c"></span>
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321
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<pre style="margin: 0;"> <span id="LC354" class="line" lang="c"><span class="c1" style="color: #998; font-style: italic;">// AtomicReadByteArrayOp_Int</span></span>
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322
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355
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<pre style="margin: 0;"> <span id="LC355" class="line" lang="c"><span class="c1" style="color: #998; font-style: italic;">// Implies a full memory barrier (see compiler/GHC/Builtin/primops.txt.pp)</span></span>
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323
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<pre style="margin: 0;"> <span id="LC356" class="line" lang="c"><span class="c1" style="color: #998; font-style: italic;">// __ATOMIC_SEQ_CST: Full barrier in both directions (hoisting and sinking</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#54f2593fa6d429b2b82cc2200e8bcda0f38854de"><strong>libraries/ghc-prim/changelog.md</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="markdown"><span class="gu" style="color: #800080; font-weight: 600;">## TBD</span></span>
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2
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="markdown"></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="markdown"><span class="p">-</span> Shipped with GHC 8.12.1</span>
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4
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="markdown"></span>
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5
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="markdown"><span class="p">-</span> Add primops for atomic exchange:</span>
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6
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="markdown"></span>
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7
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="markdown"><span class="sb" style="color: #d14;"> interlockedExchangeAddr# :: Addr# -> Addr# -> State# s -> (# State# s, Addr# #)</span></span>
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8
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="markdown"><span class="sb" style="color: #d14;"> interlockedExchangeInt# :: Addr# -> Int# -> State# s -> (# State# s, Int# #)</span></span>
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9
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="markdown"></span>
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1
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10
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="markdown"><span class="gu" style="color: #800080; font-weight: 600;">## 0.6.1 (edit as necessary)</span></span>
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2
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11
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="markdown"></span>
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3
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12
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="markdown"><span class="p">-</span> Shipped with GHC 8.10.1</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#2ab80221ce99aa96a346b29d4e98230cf4d915a7"><strong>rts/package.conf.in</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -168,6 +168,10 @@ ld-options:</td>
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168
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<pre style="margin: 0;"> <span id="LC168" class="line" lang="plaintext">#if WORD_SIZE_IN_BITS == 64</span>
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<pre style="margin: 0;"> <span id="LC169" class="line" lang="plaintext"> , "-Wl,-u,_hs_cmpxchg64"</span>
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170
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<pre style="margin: 0;"> <span id="LC170" class="line" lang="plaintext">#endif</span>
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171
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<pre style="margin: 0;">+<span id="LC171" class="line" lang="plaintext"> , "-Wl,-u,_hs_xchg8"</span>
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172
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<pre style="margin: 0;">+<span id="LC172" class="line" lang="plaintext"> , "-Wl,-u,_hs_xchg16"</span>
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173
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<pre style="margin: 0;">+<span id="LC173" class="line" lang="plaintext"> , "-Wl,-u,_hs_xchg32"</span>
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174
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<pre style="margin: 0;">+<span id="LC174" class="line" lang="plaintext"> , "-Wl,-u,_hs_xchg64"</span>
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171
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175
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<pre style="margin: 0;"> <span id="LC175" class="line" lang="plaintext"> , "-Wl,-u,_hs_atomicread8"</span>
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172
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176
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<pre style="margin: 0;"> <span id="LC176" class="line" lang="plaintext"> , "-Wl,-u,_hs_atomicread16"</span>
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173
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177
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<pre style="margin: 0;"> <span id="LC177" class="line" lang="plaintext"> , "-Wl,-u,_hs_atomicread32"</span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -273,6 +277,10 @@ ld-options:</td>
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273
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277
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<pre style="margin: 0;"> <span id="LC277" class="line" lang="plaintext">#if WORD_SIZE_IN_BITS == 64</span>
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274
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278
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<pre style="margin: 0;"> <span id="LC278" class="line" lang="plaintext"> , "-Wl,-u,hs_cmpxchg64"</span>
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275
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279
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<pre style="margin: 0;"> <span id="LC279" class="line" lang="plaintext">#endif</span>
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280
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<pre style="margin: 0;">+<span id="LC280" class="line" lang="plaintext"> , "-Wl,-u,hs_xchg8"</span>
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281
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<pre style="margin: 0;">+<span id="LC281" class="line" lang="plaintext"> , "-Wl,-u,hs_xchg16"</span>
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282
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<pre style="margin: 0;">+<span id="LC282" class="line" lang="plaintext"> , "-Wl,-u,hs_xchg32"</span>
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283
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<pre style="margin: 0;">+<span id="LC283" class="line" lang="plaintext"> , "-Wl,-u,hs_xchg64"</span>
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284
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<pre style="margin: 0;"> <span id="LC284" class="line" lang="plaintext"> , "-Wl,-u,hs_atomicread8"</span>
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285
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<pre style="margin: 0;"> <span id="LC285" class="line" lang="plaintext"> , "-Wl,-u,hs_atomicread16"</span>
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278
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286
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<pre style="margin: 0;"> <span id="LC286" class="line" lang="plaintext"> , "-Wl,-u,hs_atomicread32"</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#e432c7b248b68100c3cc37db36ee80d975efd697"><strong>rts/rts.cabal.in</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -264,6 +264,10 @@ library</td>
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264
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264
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<pre style="margin: 0;"> <span id="LC264" class="line" lang="plaintext"> "-Wl,-u,_hs_cmpxchg8"</span>
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265
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265
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<pre style="margin: 0;"> <span id="LC265" class="line" lang="plaintext"> "-Wl,-u,_hs_cmpxchg16"</span>
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266
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266
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<pre style="margin: 0;"> <span id="LC266" class="line" lang="plaintext"> "-Wl,-u,_hs_cmpxchg32"</span>
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267
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<pre style="margin: 0;">+<span id="LC267" class="line" lang="plaintext"> "-Wl,-u,_hs_xchg8"</span>
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268
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<pre style="margin: 0;">+<span id="LC268" class="line" lang="plaintext"> "-Wl,-u,_hs_xchg16"</span>
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269
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<pre style="margin: 0;">+<span id="LC269" class="line" lang="plaintext"> "-Wl,-u,_hs_xchg32"</span>
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<pre style="margin: 0;">+<span id="LC270" class="line" lang="plaintext"> "-Wl,-u,_hs_xchg64"</span>
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<pre style="margin: 0;"> <span id="LC271" class="line" lang="plaintext"> "-Wl,-u,_hs_atomicread8"</span>
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<pre style="margin: 0;"> <span id="LC272" class="line" lang="plaintext"> "-Wl,-u,_hs_atomicread16"</span>
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<pre style="margin: 0;"> <span id="LC273" class="line" lang="plaintext"> "-Wl,-u,_hs_atomicread32"</span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -339,6 +343,10 @@ library</td>
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<pre style="margin: 0;"> <span id="LC343" class="line" lang="plaintext"> "-Wl,-u,hs_cmpxchg8"</span>
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<pre style="margin: 0;"> <span id="LC344" class="line" lang="plaintext"> "-Wl,-u,hs_cmpxchg16"</span>
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<pre style="margin: 0;"> <span id="LC345" class="line" lang="plaintext"> "-Wl,-u,hs_cmpxchg32"</span>
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<pre style="margin: 0;"> <span id="LC350" class="line" lang="plaintext"> "-Wl,-u,hs_atomicread8"</span>
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<pre style="margin: 0;"> <span id="LC351" class="line" lang="plaintext"> "-Wl,-u,hs_atomicread16"</span>
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<pre style="margin: 0;"> <span id="LC352" class="line" lang="plaintext"> "-Wl,-u,hs_atomicread32"</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#b9bba9766faf563ab195fb1402f14fa78ad5c66f"><strong>testsuite/tests/codeGen/should_run/all.T</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -205,3 +205,4 @@ test('T15892',</td>
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<pre style="margin: 0;"> <span id="LC205" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16617</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC206" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16449_2</span><span class="p">',</span> <span class="nv" style="color: #008080;">exit_code</span><span class="p">(</span><span class="mi" style="color: #099;">0</span><span class="p">),</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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207
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<pre style="margin: 0;"> <span id="LC207" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16846</span><span class="p">',</span> <span class="p">[</span><span class="nv" style="color: #008080;">only_ways</span><span class="p">(['</span><span class="s1" style="color: #d14;">optasm</span><span class="p">']),</span> <span class="nv" style="color: #008080;">exit_code</span><span class="p">(</span><span class="mi" style="color: #099;">1</span><span class="p">)],</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;">+<span id="LC208" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">cg_xchg001</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span></pre>
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<td class="line_content match" style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">\ No newline at end of file</td>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8960491c812ef7e89c9d0ea2c9a0efa0cefafae9#adf5225589c3a01be46a7e6e9927a0d7f772d32d"><strong>testsuite/tests/codeGen/should_run/cg_xchg001.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP, MagicHash, BlockArguments, UnboxedTuples #-}</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Tests for the atomic exchange primop.</span></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We initialize a value with 1, and then perform exchanges on it</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- with two different values. At the end all the values should still</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- be present.</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">Main</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">main</span> <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Bits</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Int</span></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Prim</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Word</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span></span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Concurrent</span></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Foreign.Marshal.Alloc</span></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Foreign.Storable</span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">sort</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="n" style="color: #333;">include</span> <span class="s" style="color: #d14;">"MachDeps.h"</span></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"> <span class="n" style="color: #333;">alloca</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr_i</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"> <span class="n" style="color: #333;">poke</span> <span class="n" style="color: #333;">ptr_i</span> <span class="p">(</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"> <span class="n" style="color: #333;">w1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newEmptyMVar</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MVar</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"> <span class="n" style="color: #333;">forkIO</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">swapN</span> <span class="mi" style="color: #099;">50000</span> <span class="mi" style="color: #099;">2</span> <span class="n" style="color: #333;">ptr_i</span></span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"> <span class="n" style="color: #333;">putMVar</span> <span class="n" style="color: #333;">w1</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"> <span class="n" style="color: #333;">v2</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">swapN</span> <span class="mi" style="color: #099;">50000</span> <span class="mi" style="color: #099;">3</span> <span class="n" style="color: #333;">ptr_i</span></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"> <span class="n" style="color: #333;">v1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">takeMVar</span> <span class="n" style="color: #333;">w1</span></span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"> <span class="n" style="color: #333;">v0</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">peek</span> <span class="n" style="color: #333;">ptr_i</span></span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Should be [1,2,3]</span></span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"> <span class="n" style="color: #333;">print</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">sort</span> <span class="p">[</span><span class="n" style="color: #333;">v0</span><span class="p">,</span><span class="n" style="color: #333;">v1</span><span class="p">,</span><span class="n" style="color: #333;">v2</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell"><span class="n" style="color: #333;">swapN</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="haskell"><span class="n" style="color: #333;">swapN</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">val</span> <span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">val</span></span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="haskell"><span class="n" style="color: #333;">swapN</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">val</span> <span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="haskell"> <span class="n" style="color: #333;">val'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">swap</span> <span class="n" style="color: #333;">ptr</span> <span class="n" style="color: #333;">val</span></span>
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<pre style="margin: 0;">+<span id="LC44" class="line" lang="haskell"> <span class="n" style="color: #333;">swapN</span> <span class="p">(</span><span class="n" style="color: #333;">n</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="n" style="color: #333;">val'</span> <span class="n" style="color: #333;">ptr</span></span>
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<pre style="margin: 0;">+<span id="LC45" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC47" class="line" lang="haskell"><span class="n" style="color: #333;">swap</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="haskell"><span class="n" style="color: #333;">swap</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">ptr</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">val</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC49" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="p">(</span><span class="n" style="color: #333;">interlockedExchangeInt</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">ptr</span> <span class="n" style="color: #333;">val</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC50" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">s2</span><span class="p">,</span> <span class="n" style="color: #333;">old_val</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">s2</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">old_val</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC51" class="line" lang="haskell"></span></pre>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext">[1,2,3]</span></pre>
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