1 #------------------------------------------------------------------------------ 2 # 3 # Copyright (c) 2006, 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 # ARShiftU64.asm 15 # 16 # Abstract: 17 # 18 # 64-bit arithmetic right shift function for IA-32 19 # 20 #------------------------------------------------------------------------------ 21 22 #include <EdkIIGlueBase.h> 23 24 .globl ASM_PFX(InternalMathARShiftU64) 25 26 #------------------------------------------------------------------------------ 27 # UINT64 28 # EFIAPI 29 # InternalMathARShiftU64 ( 30 # IN UINT64 Operand, 31 # IN UINTN Count 32 # ); 33 #------------------------------------------------------------------------------ 34 ASM_PFX(InternalMathARShiftU64): 35 movb 12(%esp), %cl 36 movl 8(%esp), %eax 37 cltd 38 testb $32, %cl 39 cmovz %eax, %edx 40 cmovz 4(%esp), %eax 41 shrdl %cl, %edx, %eax 42 sar %cl, %edx 43 ret 44
