diff options
Diffstat (limited to 'libass/x86/cpuid.asm')
| -rw-r--r-- | libass/x86/cpuid.asm | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/libass/x86/cpuid.asm b/libass/x86/cpuid.asm index 09b3e77..b27d906 100644 --- a/libass/x86/cpuid.asm +++ b/libass/x86/cpuid.asm @@ -23,6 +23,30 @@ SECTION .text ;------------------------------------------------------------------------------ +; uint32_t has_cpuid( void ); +;------------------------------------------------------------------------------ + +INIT_XMM +cglobal has_cpuid, 0, 0, 0 +%if ARCH_X86_64 + mov eax, 1 +%else + pushfd + pop ecx + mov eax, ecx + xor eax, 0x00200000 + push eax + popfd + pushfd + pop eax + xor eax, ecx + and eax, 0x00200000 ; non-zero if bit is writable + push ecx ; Restore original EFLAGS + popfd +%endif + RET + +;------------------------------------------------------------------------------ ; void get_cpuid( uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx); ;------------------------------------------------------------------------------ |