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Differential D20281 Diff 57465 head/sys/i386/i386/npx.c

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head/sys/i386/i386/npx.c

Show First 20 Lines • Show All 346 Lines • ▼ Show 20 Linesinit_xsave(void)
if (use_xsave) if (use_xsave)
return; return;
if (!cpu_fxsr || (cpu_feature2 & CPUID2_XSAVE) == 0) if (!cpu_fxsr || (cpu_feature2 & CPUID2_XSAVE) == 0)
return; return;
use_xsave = 1; use_xsave = 1;
TUNABLE_INT_FETCH("hw.use_xsave", &use_xsave); TUNABLE_INT_FETCH("hw.use_xsave", &use_xsave);
} }
DEFINE_IFUNC(, void, fpusave, (union savefpu *), static) DEFINE_IFUNC(, void, fpusave, (union savefpu *))
{ {
init_xsave(); init_xsave();
if (use_xsave) if (use_xsave)
return ((cpu_stdext_feature & CPUID_EXTSTATE_XSAVEOPT) != 0 ? return ((cpu_stdext_feature & CPUID_EXTSTATE_XSAVEOPT) != 0 ?
fpusave_xsaveopt : fpusave_xsave); fpusave_xsaveopt : fpusave_xsave);
if (cpu_fxsr) if (cpu_fxsr)
return (fpusave_fxsave); return (fpusave_fxsave);
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