1 ;------------------------------------------------------------------------------ 2 ; 3 ; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR> 4 ; This program and the accompanying materials 5 ; are licensed and made available under the terms and conditions of the BSD License 6 ; which accompanies this distribution. The full text of the license may be found at 7 ; http://opensource.org/licenses/bsd-license.php. 8 ; 9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 ; 12 ; Module Name: 13 ; 14 ; RShiftU64.asm 15 ; 16 ; Abstract: 17 ; 18 ; 64-bit logical right shift function for IA-32 19 ; 20 ;------------------------------------------------------------------------------ 21 22 .686 23 .model flat,C 24 .code 25 26 ;------------------------------------------------------------------------------ 27 ; UINT64 28 ; EFIAPI 29 ; InternalMathRShiftU64 ( 30 ; IN UINT64 Operand, 31 ; IN UINTN Count 32 ; ); 33 ;------------------------------------------------------------------------------ 34 InternalMathRShiftU64 PROC 35 mov cl, [esp + 12] ; cl <- Count 36 xor edx, edx 37 mov eax, [esp + 8] 38 test cl, 32 ; Count >= 32? 39 jnz @F 40 mov edx, eax 41 mov eax, [esp + 4] 42 @@: 43 shrd eax, edx, cl 44 shr edx, cl 45 ret 46 InternalMathRShiftU64 ENDP 47 48 END 49
