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b341712e 1#------------------------------------------------------------------------------\r
2#\r
2c7e5c2f
HT
3# Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r
4# This program and the accompanying materials\r
b341712e 5# are licensed and made available under the terms and conditions of the BSD License\r
6# which accompanies this distribution. The full text of the license may be found at\r
7# http://opensource.org/licenses/bsd-license.php\r
8#\r
9# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
10# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
11#\r
12# Module Name:\r
13#\r
14# RShiftU64.asm\r
15#\r
16# Abstract:\r
17#\r
18# 64-bit logical right shift function for IA-32\r
19#\r
20#------------------------------------------------------------------------------\r
21\r
22#include <EdkIIGlueBase.h>\r
23\r
24 .686:\r
25 .code:\r
26\r
27.globl ASM_PFX(InternalMathRShiftU64)\r
28\r
29#------------------------------------------------------------------------------\r
30# UINT64\r
31# EFIAPI\r
32# InternalMathRShiftU64 (\r
33# IN UINT64 Operand,\r
34# IN UINTN Count\r
35# );\r
36#------------------------------------------------------------------------------\r
37ASM_PFX(InternalMathRShiftU64):\r
38 movb 12(%esp), %cl\r
39 xorl %edx, %edx\r
40 movl 8(%esp), %eax\r
41 testb $32, %cl\r
42 cmovz %eax, %edx\r
43 cmovz 0x4(%esp), %eax\r
44 shrdl %cl, %edx, %eax\r
45 shr %cl, %edx\r
46 ret\r