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Disable UseFPUForSpilling on families starting with Haswell.

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This commit is contained in:
Mohamed Issa 2026-08-02 22:39:44 -07:00
parent 31efcb3168
commit a347360a5f
1 changed files with 6 additions and 1 deletions
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7
src/hotspot/cpu/x86/vm_version_x86.cpp
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@ -1794,7 +1794,12 @@ void VM_Version::get_processor_features() {
}
#ifdef COMPILER2
if (FLAG_IS_DEFAULT(UseFPUForSpilling) && supports_sse4_2()) {
FLAG_SET_DEFAULT(UseFPUForSpilling, false);
// Spilling to FPU registers not beneficial on Haswell and beyond
if (UseAVX > 1) {
FLAG_SET_DEFAULT(UseFPUForSpilling, false);
} else {
FLAG_SET_DEFAULT(UseFPUForSpilling, true);
}
}
#endif
}