5b681e391be237d2b92cd6bb65089759c17bcaa8
[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / RShiftU64.s
1 #------------------------------------------------------------------------------
2 #
3 # Copyright (c) 2006, Intel Corporation
4 # All rights reserved. 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
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25
26 .global _RShiftU64
27 _RShiftU64:
28 movb 12(%esp),%cl
29 xorl %edx,%edx
30 movl 8(%esp),%eax
31 testb $32,%cl
32 cmovz %eax, %edx
33 cmovz 4(%esp), %eax
34 shrdl %cl,%edx,%eax
35 shrl %cl,%edx
36 ret
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