[commit: ghc] ghc-8.2: implement missing Fabs{32, 64} on i386 NCG and UNREG (98ac934)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : ghc-8.2
Link       : http://ghc.haskell.org/trac/ghc/changeset/98ac93463db59f802dd79b44b0b7b16f7760826e/ghc

>---------------------------------------------------------------

commit 98ac93463db59f802dd79b44b0b7b16f7760826e
Author: Sergei Trofimovich <slyfox at gentoo.org>
Date:   Fri Mar 10 09:30:10 2017 +0000

    implement missing Fabs{32,64} on i386 NCG and UNREG
    
    Noticed breakage as build failure on i386 freebsd build bot:
      http://haskell.inf.elte.hu/builders/freebsd-i386-head/1267/10.html
    
      ghc-stage1: panic! (the 'impossible' happened)
        (GHC version 8.1.20170310 for i386-portbld-freebsd):
          outOfLineCmmOp: MO_F64_Fabs not supported here
    
    Signed-off-by: Sergei Trofimovich <slyfox at gentoo.org>
    (cherry picked from commit 46246a6d57c35ebf12032d13a4cd7ff18f713770)


>---------------------------------------------------------------

98ac93463db59f802dd79b44b0b7b16f7760826e
 compiler/cmm/PprC.hs              | 4 ++--
 compiler/nativeGen/X86/CodeGen.hs | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/compiler/cmm/PprC.hs b/compiler/cmm/PprC.hs
index 6a84e30..aa21174 100644
--- a/compiler/cmm/PprC.hs
+++ b/compiler/cmm/PprC.hs
@@ -754,7 +754,7 @@ pprCallishMachOp_for_C mop
         MO_F64_Log      -> text "log"
         MO_F64_Exp      -> text "exp"
         MO_F64_Sqrt     -> text "sqrt"
-        MO_F64_Fabs     -> unsupported
+        MO_F64_Fabs     -> text "fabs"
         MO_F32_Pwr      -> text "powf"
         MO_F32_Sin      -> text "sinf"
         MO_F32_Cos      -> text "cosf"
@@ -768,7 +768,7 @@ pprCallishMachOp_for_C mop
         MO_F32_Log      -> text "logf"
         MO_F32_Exp      -> text "expf"
         MO_F32_Sqrt     -> text "sqrtf"
-        MO_F32_Fabs     -> unsupported
+        MO_F32_Fabs     -> text "fabsf"
         MO_WriteBarrier -> text "write_barrier"
         MO_Memcpy _     -> text "memcpy"
         MO_Memset _     -> text "memset"
diff --git a/compiler/nativeGen/X86/CodeGen.hs b/compiler/nativeGen/X86/CodeGen.hs
index 704514e..562303c 100644
--- a/compiler/nativeGen/X86/CodeGen.hs
+++ b/compiler/nativeGen/X86/CodeGen.hs
@@ -2623,7 +2623,7 @@ outOfLineCmmOp mop res args
 
         fn = case mop of
               MO_F32_Sqrt  -> fsLit "sqrtf"
-              MO_F32_Fabs  -> unsupported
+              MO_F32_Fabs  -> fsLit "fabsf"
               MO_F32_Sin   -> fsLit "sinf"
               MO_F32_Cos   -> fsLit "cosf"
               MO_F32_Tan   -> fsLit "tanf"
@@ -2640,7 +2640,7 @@ outOfLineCmmOp mop res args
               MO_F32_Pwr   -> fsLit "powf"
 
               MO_F64_Sqrt  -> fsLit "sqrt"
-              MO_F64_Fabs  -> unsupported
+              MO_F64_Fabs  -> fsLit "fabs"
               MO_F64_Sin   -> fsLit "sin"
               MO_F64_Cos   -> fsLit "cos"
               MO_F64_Tan   -> fsLit "tan"