Mercurial > hg > truffle
diff src/cpu/x86/vm/vm_version_x86.cpp @ 1730:f55c4f82ab9d
6978249: spill between cpu and fpu registers when those moves are fast
Reviewed-by: kvn
author | never |
---|---|
date | Thu, 19 Aug 2010 14:51:47 -0700 |
parents | 76efbe666d6c |
children | 3e8fbc61cee8 |
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--- a/src/cpu/x86/vm/vm_version_x86.cpp Wed Aug 18 01:22:16 2010 -0700 +++ b/src/cpu/x86/vm/vm_version_x86.cpp Thu Aug 19 14:51:47 2010 -0700 @@ -482,6 +482,15 @@ } } +#ifdef COMPILER2 + if (UseFPUForSpilling) { + if (UseSSE < 2) { + // Only supported with SSE2+ + FLAG_SET_DEFAULT(UseFPUForSpilling, false); + } + } +#endif + assert(0 <= ReadPrefetchInstr && ReadPrefetchInstr <= 3, "invalid value"); assert(0 <= AllocatePrefetchInstr && AllocatePrefetchInstr <= 3, "invalid value"); @@ -520,6 +529,11 @@ if( supports_sse4_2() && supports_ht() ) { // Nehalem based cpus AllocatePrefetchDistance = 192; AllocatePrefetchLines = 4; +#ifdef COMPILER2 + if (AggressiveOpts && FLAG_IS_DEFAULT(UseFPUForSpilling)) { + FLAG_SET_DEFAULT(UseFPUForSpilling, true); + } +#endif } } assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value");