1) Sync EdkCompatibilityPkg with EDK 1.04. The changes includes:

[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EdkIIGlueLib / Library / BaseLib / Ia32 / RShiftU64.asm

; Copyright (c) 2004, 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
;   RShiftU64.asm\r
;\r
; Abstract:\r
;\r
;   64-bit logical right shift function for IA-32\r
;\r
;------------------------------------------------------------------------------\r
\r
    .686\r
    .model  flat,C\r
    .code\r
\r
;------------------------------------------------------------------------------\r
; UINT64\r
; EFIAPI\r
; InternalMathRShiftU64 (\r
;   IN      UINT64                    Operand,\r
;   IN      UINTN                     Count\r
;   );\r
;------------------------------------------------------------------------------\r
InternalMathRShiftU64   PROC\r
    mov     cl, [esp + 12]              ; cl <- Count\r
    xor     edx, edx\r
    mov     eax, [esp + 8]\r
    test    cl, 32                      ; Count >= 32?\r
    cmovz   edx, eax\r
    cmovz   eax, [esp + 4]\r
    shrd    eax, edx, cl\r
    shr     edx, cl\r
    ret\r
InternalMathRShiftU64   ENDP\r
\r
    END\r