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e1f414b6 | 1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
1f86b07d | 3 | # Copyright (c) 2006 - 2008, Intel Corporation\r |
e1f414b6 | 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 | |
1f86b07d | 14 | # RRotU64.S\r |
e1f414b6 | 15 | #\r |
16 | # Abstract:\r | |
17 | #\r | |
18 | # 64-bit right rotation for Ia32\r | |
19 | #\r | |
20 | #------------------------------------------------------------------------------\r | |
21 | \r | |
132f41f0 | 22 | ASM_GLOBAL ASM_PFX(InternalMathRRotU64)\r |
e1f414b6 | 23 | \r |
24 | #------------------------------------------------------------------------------\r | |
25 | # UINT64\r | |
26 | # EFIAPI\r | |
27 | # InternalMathRRotU64 (\r | |
28 | # IN UINT64 Operand,\r | |
29 | # IN UINTN Count\r | |
30 | # );\r | |
31 | #------------------------------------------------------------------------------\r | |
32 | ASM_PFX(InternalMathRRotU64):\r | |
33 | push %ebx\r | |
34 | movb 16(%esp), %cl\r | |
35 | movl 8(%esp), %eax\r | |
36 | movl 12(%esp), %edx\r | |
37 | shrdl %cl, %eax, %ebx\r | |
38 | shrdl %cl, %edx, %eax\r | |
39 | roll %cl, %ebx\r | |
40 | shrdl %cl, %ebx, %edx\r | |
57246fe0 | 41 | testb $32, %cl # Count >= 32?\r |
42 | cmovnz %eax, %ecx # switch eax & edx if Count >= 32\r | |
e1f414b6 | 43 | cmovnz %edx, %eax\r |
44 | cmovnz %ecx, %edx\r | |
45 | pop %ebx\r | |
46 | ret\r |