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878ddf1f | 1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
3 | # Copyright (c) 2006, Intel Corporation\r | |
4 | # All rights reserved. This program and the accompanying materials\r | |
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 | # ARShiftU64.asm\r | |
15 | #\r | |
16 | # Abstract:\r | |
17 | #\r | |
18 | # 64-bit arithmetic right shift function for IA-32\r | |
19 | #\r | |
20 | #------------------------------------------------------------------------------\r | |
21 | \r | |
b7089db1 | 22 | .globl _InternalMathARShiftU64\r |
3f566587 | 23 | \r |
24 | #------------------------------------------------------------------------------\r | |
25 | # UINT64\r | |
26 | # EFIAPI\r | |
27 | # InternalMathARShiftU64 (\r | |
28 | # IN UINT64 Operand,\r | |
29 | # IN UINTN Count\r | |
30 | # );\r | |
31 | #------------------------------------------------------------------------------\r | |
32 | _InternalMathARShiftU64:\r | |
33 | movb 12(%esp), %cl\r | |
34 | movl 8(%esp), %eax\r | |
878ddf1f | 35 | cltd\r |
3f566587 | 36 | testb $32, %cl\r |
878ddf1f | 37 | cmovz %eax, %edx\r |
878ddf1f | 38 | cmovz 4(%esp), %eax\r |
3f566587 | 39 | shrdl %cl, %edx, %eax\r |
40 | sar %cl, %edx\r | |
878ddf1f | 41 | ret\r |