ref: 34b994f6387b05b12702aa7d78321fae8e1210c3
dir: /codec/common/x86/cpuid.asm/
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;*
;*
;* cpu_mmx.asm
;*
;* Abstract
;* verify cpuid feature support and cpuid detection
;*
;* History
;* 04/29/2009 Created
;*
;*************************************************************************/
%include "asm_inc.asm"
;******************************************************************************************
; Macros
;******************************************************************************************
;******************************************************************************************
; Code
;******************************************************************************************
SECTION .text
; refer to "The IA-32 Intel(R) Architecture Software Developers Manual, Volume 2A A-M"
; section CPUID - CPU Identification
;******************************************************************************************
; int32_t WelsCPUIdVerify()
;******************************************************************************************
WELS_EXTERN WelsCPUIdVerify
push r1
PUSHRFLAGS
PUSHRFLAGS
pop r1
mov eax, r1d
xor eax, 00200000h
xor eax, r1d
POPRFLAGS
pop r1
ret
;****************************************************************************************************
; void WelsCPUId( int32_t uiIndex, int32_t *pFeatureA, int32_t *pFeatureB, int32_t *pFeatureC, int32_t *pFeatureD )
;****************************************************************************************************
%ifdef WIN64
WELS_EXTERN WelsCPUId
push rbx
push rdx
mov eax, ecx
mov ecx, [r9]
cpuid
mov [r9], ecx
mov [r8], ebx
mov rcx, [rsp + 2*8 + 40]
mov [rcx], edx
pop rdx
mov [rdx], eax
pop rbx
ret
%elifdef UNIX64
WELS_EXTERN WelsCPUId
push rbx
push rcx
push rdx
mov eax, edi
mov ecx, [rcx]
cpuid
mov [r8], edx
pop rdx
pop r8
mov [r8], ecx
mov [rdx], ebx
mov [rsi], eax
pop rbx
ret
%elifdef X86_32
WELS_EXTERN WelsCPUId
push ebx
push edi
mov eax, [esp+12] ; operating index
mov edi, [esp+24]
mov ecx, [edi]
cpuid ; cpuid
; processing various information return
mov edi, [esp+16]
mov [edi], eax
mov edi, [esp+20]
mov [edi], ebx
mov edi, [esp+24]
mov [edi], ecx
mov edi, [esp+28]
mov [edi], edx
pop edi
pop ebx
ret
%endif
; need call after cpuid=1 and eax, ecx flag got then
;****************************************************************************************************
; int32_t WelsCPUSupportAVX( uint32_t eax, uint32_t ecx )
;****************************************************************************************************
WELS_EXTERN WelsCPUSupportAVX
%ifdef WIN64
mov eax, ecx
mov ecx, edx
%elifdef UNIX64
mov eax, edi
mov ecx, esi
%else
mov eax, [esp+4]
mov ecx, [esp+8]
%endif
; refer to detection of AVX addressed in INTEL AVX manual document
and ecx, 018000000H
cmp ecx, 018000000H ; check both OSXSAVE and AVX feature flags
jne avx_not_supported
; processor supports AVX instructions and XGETBV is enabled by OS
mov ecx, 0 ; specify 0 for XFEATURE_ENABLED_MASK register
XGETBV ; result in EDX:EAX
and eax, 06H
cmp eax, 06H ; check OS has enabled both XMM and YMM state support
jne avx_not_supported
mov eax, 1
ret
avx_not_supported:
mov eax, 0
ret
; need call after cpuid=1 and eax, ecx flag got then
;****************************************************************************************************
; int32_t WelsCPUSupportFMA( uint32_t eax, uint32_t ecx )
;****************************************************************************************************
WELS_EXTERN WelsCPUSupportFMA
%ifdef WIN64
mov eax, ecx
mov ecx, edx
%elifdef UNIX64
mov eax, edi
mov ecx, esi
%else
mov eax, [esp+4]
mov ecx, [esp+8]
%endif
; refer to detection of FMA addressed in INTEL AVX manual document
and ecx, 018001000H
cmp ecx, 018001000H ; check OSXSAVE, AVX, FMA feature flags
jne fma_not_supported
; processor supports AVX,FMA instructions and XGETBV is enabled by OS
mov ecx, 0 ; specify 0 for XFEATURE_ENABLED_MASK register
XGETBV ; result in EDX:EAX
and eax, 06H
cmp eax, 06H ; check OS has enabled both XMM and YMM state support
jne fma_not_supported
mov eax, 1
ret
fma_not_supported:
mov eax, 0
ret
;******************************************************************************************
; void WelsEmms()
;******************************************************************************************
WELS_EXTERN WelsEmms
emms ; empty mmx technology states
ret