projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| b1ff428c | 1 | #------------------------------------------------------------------------------\r |
| 2 | #\r | |
| bb817c56 HT |
3 | # Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
| 4 | # This program and the accompanying materials\r | |
| b1ff428c | 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.S\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 | .686:\r | |
| 23 | .code:\r | |
| 24 | \r | |
| 132f41f0 | 25 | ASM_GLOBAL ASM_PFX(InternalMathRShiftU64)\r |
| b1ff428c | 26 | \r |
| 27 | #------------------------------------------------------------------------------\r | |
| 28 | # UINT64\r | |
| 29 | # EFIAPI\r | |
| 30 | # InternalMathRShiftU64 (\r | |
| 31 | # IN UINT64 Operand,\r | |
| 32 | # IN UINTN Count\r | |
| 33 | # );\r | |
| 34 | #------------------------------------------------------------------------------\r | |
| 35 | ASM_PFX(InternalMathRShiftU64):\r | |
| 36 | movb 12(%esp), %cl # cl <- Count\r | |
| 37 | xorl %edx, %edx\r | |
| 38 | movl 8(%esp), %eax\r | |
| 39 | testb $32, %cl # Count >= 32?\r | |
| 40 | cmovz %eax, %edx\r | |
| 41 | cmovz 0x4(%esp), %eax\r | |
| 42 | shrdl %cl, %edx, %eax\r | |
| 43 | shr %cl, %edx\r | |
| 44 | ret\r |