diff options
Diffstat (limited to 'simd/jsimdcpu.asm')
| -rw-r--r-- | simd/jsimdcpu.asm | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/simd/jsimdcpu.asm b/simd/jsimdcpu.asm index 6bb4e32..862de29 100644 --- a/simd/jsimdcpu.asm +++ b/simd/jsimdcpu.asm @@ -51,6 +51,22 @@ EXTN(jpeg_simd_cpu_support): xor eax,edx jz short .return ; CPUID is not supported + ; Check for MMX instruction support + xor eax,eax + cpuid + test eax,eax + jz short .return + + xor eax,eax + inc eax + cpuid + mov eax,edx ; eax = Standard feature flags + + test eax, 1<<23 ; bit23:MMX + jz short .no_mmx + or edi, byte JSIMD_MMX +.no_mmx: + .return: mov eax,edi |