Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break existing...

[mirror_edk2.git] / OldMdePkg / Library / BaseLib / Ia32 / CpuId.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006, Intel Corporation\r
; All rights reserved. This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution.  The full text of the license may be found at\r
; http://opensource.org/licenses/bsd-license.php\r
;\r
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
;\r
; Module Name:\r
;\r
;   CpuId.Asm\r
;\r
; Abstract:\r
;\r
;   AsmCpuid function\r
;\r
; Notes:\r
;\r
;------------------------------------------------------------------------------\r
\r
    .586P\r
    .model  flat,C\r
    .code\r
\r
;------------------------------------------------------------------------------\r
;  VOID\r
;  EFIAPI\r
;  AsmCpuid (\r
;    IN   UINT32  RegisterInEax,\r
;    OUT  UINT32  *RegisterOutEax  OPTIONAL,\r
;    OUT  UINT32  *RegisterOutEbx  OPTIONAL,\r
;    OUT  UINT32  *RegisterOutEcx  OPTIONAL,\r
;    OUT  UINT32  *RegisterOutEdx  OPTIONAL\r
;    );\r
;------------------------------------------------------------------------------\r
AsmCpuid    PROC    USES    ebx\r
    push    ebp\r
    mov     ebp, esp\r
    mov     eax, [ebp + 12]\r
    cpuid\r
    push    ecx\r
    mov     ecx, [ebp + 16]\r
    jecxz   @F\r
    mov     [ecx], eax\r
@@:\r
    mov     ecx, [ebp + 20]\r
    jecxz   @F\r
    mov     [ecx], ebx\r
@@:\r
    mov     ecx, [ebp + 24]\r
    jecxz   @F\r
    pop     [ecx]\r
@@:\r
    mov     ecx, [ebp + 28]\r
    jecxz   @F\r
    mov     [ecx], edx\r
@@:\r
    mov     eax, [ebp + 12]\r
    leave\r
    ret\r
AsmCpuid    ENDP\r
\r
    END\r