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Fixed CPU dispatching check for halfvec distance functions

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This commit is contained in:
Andrew Kane
2024-04-17 18:27:27 -07:00
parent e2d8907180
commit fb6af03361
1 changed files with 18 additions and 5 deletions
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23
src/halfutils.c
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@@ -192,13 +192,20 @@ HalfvecCosineSimilarityF16cFma(int dim, half * ax, half * bx)
#endif
#ifdef HALFVEC_DISPATCH
#define CPU_FEATURE_FMA (1 << 12)
#define CPU_FEATURE_F16C (1 << 29)
#define CPU_FEATURE_FMA (1 << 12)
#define CPU_FEATURE_OSXSAVE (1 << 27)
#define CPU_FEATURE_AVX (1 << 28)
#define CPU_FEATURE_F16C (1 << 29)
static bool
#ifdef _MSC_VER
#define TARGET_XSAVE
#else
#define TARGET_XSAVE __attribute__((target("xsave")))
#endif
TARGET_XSAVE static bool
SupportsCpuFeature(unsigned int feature)
{
/* TODO Fix check */
unsigned int exx[4] = {0, 0, 0, 0};
#if defined(HAVE__GET_CPUID)
@@ -207,6 +214,12 @@ SupportsCpuFeature(unsigned int feature)
__cpuid(exx, 1);
#endif
if ((exx[2] & CPU_FEATURE_OSXSAVE) != CPU_FEATURE_OSXSAVE)
return false;
if ((_xgetbv(0) & 6) != 6)
return false;
return (exx[2] & feature) == feature;
}
#endif
@@ -223,7 +236,7 @@ HalfvecInit(void)
HalfvecCosineSimilarity = HalfvecCosineSimilarityDefault;
#ifdef HALFVEC_DISPATCH
if (SupportsCpuFeature(CPU_FEATURE_FMA | CPU_FEATURE_F16C))
if (SupportsCpuFeature(CPU_FEATURE_AVX | CPU_FEATURE_F16C | CPU_FEATURE_FMA))
{
HalfvecL2SquaredDistance = HalfvecL2SquaredDistanceF16cFma;
HalfvecInnerProduct = HalfvecInnerProductF16cFma;