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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 |
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22 | .globl _InternalMathARShiftU64\r |
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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 |
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35 | cltd\r |
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36 | testb $32, %cl\r |
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37 | cmovz %eax, %edx\r |
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38 | cmovz 4(%esp), %eax\r |
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39 | shrdl %cl, %edx, %eax\r |
40 | sar %cl, %edx\r |
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41 | ret\r |