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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f945eea569993a4e5ed953f4573e6eab785f309f">f945eea5</a></strong>
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<span>by Ben Gamari</span>
<i>at 2020-06-01T06:34:58-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">nonmoving: Optimise log2_ceil
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<h4>1 changed file:</h4>
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<a href="#b4a38dad10ba126e05a0b6adc99aa0c2eb742875">
rts/sm/NonMoving.c
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<h4>Changes:</h4>
<li id="b4a38dad10ba126e05a0b6adc99aa0c2eb742875">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f945eea569993a4e5ed953f4573e6eab785f309f#b4a38dad10ba126e05a0b6adc99aa0c2eb742875"><strong>rts/sm/NonMoving.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">@@ -586,15 +586,9 @@ static struct NonmovingSegment *nonmovingAllocSegment(uint32_t node)</td>
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<pre style="margin: 0;"> <span id="LC586" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="n" style="color: #333;">ret</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC587" class="line" lang="c"><span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC588" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC589" class="line" lang="c"><span class="k" style="font-weight: 600;">static</span> <span class="kr" style="font-weight: 600;">inline</span> <span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="kt" style="color: #458; font-weight: 600;">long</span> <span class="nf" style="color: #900; font-weight: 600;">log2_floor</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="kt" style="color: #458; font-weight: 600;">long</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC590" class="line" lang="c"><span class="p">{</span></span>
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591
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<pre style="margin: 0;">-<span id="LC591" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="kt" style="color: #458; font-weight: 600;">long</span><span class="p">)</span><span class="o" style="font-weight: 600;">*</span><span class="mi" style="color: #099;">8</span> <span class="o" style="font-weight: 600;">-</span> <span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">__builtin_clzl</span><span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">);</span></span>
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592
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<pre style="margin: 0;">-<span id="LC592" class="line" lang="c"><span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC593" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC589" class="line" lang="c"><span class="k" style="font-weight: 600;">static</span> <span class="kr" style="font-weight: 600;">inline</span> <span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="kt" style="color: #458; font-weight: 600;">long</span> <span class="nf" style="color: #900; font-weight: 600;">log2_ceil</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="kt" style="color: #458; font-weight: 600;">long</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC590" class="line" lang="c"><span class="p">{</span></span>
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<pre style="margin: 0;">-<span id="LC596" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="kt" style="color: #458; font-weight: 600;">long</span> <span class="n" style="color: #333;">log</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">log2_floor</span><span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">);</span></span>
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<pre style="margin: 0;">-<span id="LC597" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="p">(</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">-</span> <span class="p">(</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;"><<</span> <span class="n" style="color: #333;">log</span><span class="p">))</span> <span class="o" style="font-weight: 600;">?</span> <span class="n" style="color: #333;">log</span> <span class="o" style="font-weight: 600;">+</span> <span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">log</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC591" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="p">(</span><span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">unsigned</span> <span class="kt" style="color: #458; font-weight: 600;">long</span><span class="p">)</span><span class="o" style="font-weight: 600;">*</span><span class="mi" style="color: #099;">8</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">__builtin_clzl</span><span class="p">(</span><span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC592" class="line" lang="c"><span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC593" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC594" class="line" lang="c"><span class="c1" style="color: #998; font-style: italic;">// Advance a segment's next_free pointer. Returns true if segment if full.</span></span>
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