Initial import.

[mirror_edk2.git] / MdePkg / Library / BaseLib / ia32 / RShiftU64.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
;   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
InternalMathRShiftU64   PROC\r
    mov     cl, [esp + 12]\r
    xor     edx, edx\r
    mov     eax, [esp + 8]\r
    test    cl, 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