projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 7905d234 JJ |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r | |
| 9344f092 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 7905d234 JJ |
5 | ;\r |
| 6 | ; Module Name:\r | |
| 7 | ;\r | |
| 8 | ; RRotU64.nasm\r | |
| 9 | ;\r | |
| 10 | ; Abstract:\r | |
| 11 | ;\r | |
| 12 | ; 64-bit right rotation for Ia32\r | |
| 13 | ;\r | |
| 14 | ;------------------------------------------------------------------------------\r | |
| 15 | \r | |
| 16 | SECTION .text\r | |
| 17 | \r | |
| 18 | ;------------------------------------------------------------------------------\r | |
| 19 | ; UINT64\r | |
| 20 | ; EFIAPI\r | |
| 21 | ; InternalMathRRotU64 (\r | |
| 22 | ; IN UINT64 Operand,\r | |
| 23 | ; IN UINTN Count\r | |
| 24 | ; );\r | |
| 25 | ;------------------------------------------------------------------------------\r | |
| 26 | global ASM_PFX(InternalMathRRotU64)\r | |
| 27 | ASM_PFX(InternalMathRRotU64):\r | |
| 28 | push ebx\r | |
| 29 | mov cl, [esp + 16]\r | |
| 30 | mov eax, [esp + 8]\r | |
| 31 | mov edx, [esp + 12]\r | |
| 32 | shrd ebx, eax, cl\r | |
| 33 | shrd eax, edx, cl\r | |
| 34 | rol ebx, cl\r | |
| 35 | shrd edx, ebx, cl\r | |
| 36 | test cl, 32 ; Count >= 32?\r | |
| 37 | jz .0\r | |
| 38 | mov ecx, eax ; switch eax & edx if Count >= 32\r | |
| 39 | mov eax, edx\r | |
| 40 | mov edx, ecx\r | |
| 41 | .0:\r | |
| 42 | pop ebx\r | |
| 43 | ret\r | |
| 44 | \r |