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b4d9b714489c89f6c5cfe1e2f03fd3f56a212344 blob 709 bytes (raw)

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#include <math.h>

static inline float fma_fmaf(float x, float y, float z)
{
	__asm__ ("vfmadd132ss %1, %2, %0" : "+x" (x) : "x" (y), "x" (z));
	return x;
}

static inline float fma4_fmaf(float x, float y, float z)
{
	__asm__ ("vfmaddss %3, %2, %1, %0" : "=x" (x) : "x" (x), "x" (y), "x" (z));
	return x;
}

#if !__FMA__ && !__FMA4__
#include "x86_64/cpuid.h"
#define fmaf __soft_fmaf
#include "../fmaf.c"
#undef fmaf
#endif

float fmaf(float x, float y, float z)
{
#if __FMA__
	return fma_fmaf(x, y, z);
#elif __FMA4__
	return fma4_fmaf(x, y, z);
#else
	if (__cpuid & X86_FEAT_FMA)
		return fma_fmaf(x, y, z);
	if (__cpuid & X86_FEAT_FMA4)
		return fma4_fmaf(x, y, z);
	return __soft_fmaf(x, y, z);
#endif
}
debug log:

solving b4d9b714 ...
found b4d9b714 in https://inbox.vuxu.org/musl/ZfVjWK1HXj886Rx2@voyager/
found 30b971ff in https://git.vuxu.org/mirror/musl/
preparing index
index prepared:
100644 30b971ff97b5862560122c1bb395835b3cc25baa	src/math/x86_64/fmaf.c

applying [1/1] https://inbox.vuxu.org/musl/ZfVjWK1HXj886Rx2@voyager/
diff --git a/src/math/x86_64/fmaf.c b/src/math/x86_64/fmaf.c
index 30b971ff..b4d9b714 100644

Checking patch src/math/x86_64/fmaf.c...
Applied patch src/math/x86_64/fmaf.c cleanly.

index at:
100644 b4d9b714489c89f6c5cfe1e2f03fd3f56a212344	src/math/x86_64/fmaf.c

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