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