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Fix FMA4 detection #262

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merged 1 commit into from
May 16, 2019
Merged

Fix FMA4 detection #262

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2 changes: 1 addition & 1 deletion src/arch/helperavx.h
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Original file line number Diff line number Diff line change
Expand Up @@ -63,7 +63,7 @@ static int cpuSupportsAVX() {
static int cpuSupportsFMA4() {
int32_t reg[4];
Sleef_x86CpuID(reg, 0x80000001, 0);
return (reg[3] & (1 << 16)) != 0;
return (reg[2] & (1 << 16)) != 0;
}

#if CONFIG == 4 && defined(__AVX__) && defined(__FMA4__)
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2 changes: 1 addition & 1 deletion src/libm/dispavx.c.org
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@ static int cpuSupportsFMA4() {
if (ret == -1) {
int32_t reg[4];
Sleef_x86CpuID(reg, 0x80000001, 0);
ret = (reg[3] & (1 << 16)) != 0;
ret = (reg[2] & (1 << 16)) != 0;
}
return ret;
}
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