--- /dev/null
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation
+; All rights reserved. This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution. The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+; CpuIdEx.Asm
+;
+; Abstract:
+;
+; AsmCpuidEx function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ .code
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; AsmCpuidEx (
+; IN UINT32 RegisterInEax,
+; IN UINT32 RegisterInEcx,
+; OUT UINT32 *RegisterOutEax OPTIONAL,
+; OUT UINT32 *RegisterOutEbx OPTIONAL,
+; OUT UINT32 *RegisterOutEcx OPTIONAL,
+; OUT UINT32 *RegisterOutEdx OPTIONAL
+; )
+;------------------------------------------------------------------------------
+AsmCpuidEx PROC USES rbx
+ mov eax, ecx
+ mov ecx, edx
+ push rax ; save Index on stack
+ cpuid
+ mov r10, [rsp + 38h]
+ test r10, r10
+ jz @F
+ mov [r10], ecx
+@@:
+ mov rcx, r8
+ jrcxz @F
+ mov [rcx], eax
+@@:
+ mov rcx, r9
+ jrcxz @F
+ mov [rcx], ebx
+@@:
+ mov rcx, [rsp + 40h]
+ jrcxz @F
+ mov [rcx], edx
+@@:
+ pop rax ; restore Index to rax as return value
+ ret
+AsmCpuidEx ENDP
+
+ END