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Detect AVX2 support, because code is compiled with -mavx2

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AVX2 instruction was generated (correct) and was causing boot failure on
IvyBridge CPUs.
This commit is contained in:
deadwood
2025-08-11 15:29:07 +02:00
parent bff93fe506
commit 68b3b2cc94
1 changed files with 14 additions and 7 deletions
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21
arch/x86_64-all/hidd/gfx/rgbconv_arch.c
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@ -55,19 +55,26 @@ ARCHCONVERTFUNCP(AVX,RGB15,ARGB32)
#endif
#define cpuid(num) \
do { asm volatile("cpuid":"=a"(eax),"=b"(ebx),"=c"(ecx),"=d"(edx):"a"(num)); } while(0)
#define cpuid(num, subnum) \
do { asm volatile("cpuid":"=a"(eax),"=b"(ebx),"=c"(ecx),"=d"(edx):"a"(num),"c"(subnum)); } while(0)
static int has_ssse3() {
ULONG eax, ebx, ecx, edx;
cpuid(0x00000001);
cpuid(0x00000001, 0x0);
return (ecx & (1 << 9)) != 0; // Bit 9 of ECX = SSSE3
}
static int has_avx() {
static int has_avx2() {
ULONG eax, ebx, ecx, edx;
cpuid(0x00000001);
return (ecx & (1 << 28)) != 0; // Bit 28 of ECX = AVX
int _ret = 0;
cpuid(0x00000001, 0x0);
_ret = (ecx & (1 << 28)) != 0; // Bit 28 of ECX = AVX
if (_ret)
{
cpuid(0x00000007, 0x0); // subleaf ECX = 0
_ret = (ebx & (1 << 5)) != 0; // Bit 5 of EBX = AVX2
}
return _ret;
}
void SetArchRGBConversionFunctions(HIDDT_RGBConversionFunction rgbconvertfuncs[NUM_RGB_STDPIXFMT][NUM_RGB_STDPIXFMT])
@ -92,7 +99,7 @@ void SetArchRGBConversionFunctions(HIDDT_RGBConversionFunction rgbconvertfuncs[N
if (has_ssse3())
useSSE3 = TRUE;
if (has_avx())
if (has_avx2())
useAVX = TRUE;
SCCFSSE2(XRGB32,BGRA32)