projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 98b85271 JJ |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r | |
| 9344f092 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 98b85271 JJ |
5 | ;\r |
| 6 | ; Module Name:\r | |
| 7 | ;\r | |
| 8 | ; CompareMem.Asm\r | |
| 9 | ;\r | |
| 10 | ; Abstract:\r | |
| 11 | ;\r | |
| 12 | ; CompareMem function\r | |
| 13 | ;\r | |
| 14 | ; Notes:\r | |
| 15 | ;\r | |
| 16 | ; The following BaseMemoryLib instances contain the same copy of this file:\r | |
| 17 | ;\r | |
| 18 | ; BaseMemoryLibRepStr\r | |
| 19 | ; BaseMemoryLibMmx\r | |
| 20 | ; BaseMemoryLibSse2\r | |
| 21 | ; BaseMemoryLibOptDxe\r | |
| 22 | ; BaseMemoryLibOptPei\r | |
| 23 | ;\r | |
| 24 | ;------------------------------------------------------------------------------\r | |
| 25 | \r | |
| 26 | DEFAULT REL\r | |
| 27 | SECTION .text\r | |
| 28 | \r | |
| 29 | ;------------------------------------------------------------------------------\r | |
| 30 | ; INTN\r | |
| 31 | ; EFIAPI\r | |
| 32 | ; InternalMemCompareMem (\r | |
| 33 | ; IN CONST VOID *DestinationBuffer,\r | |
| 34 | ; IN CONST VOID *SourceBuffer,\r | |
| 35 | ; IN UINTN Length\r | |
| 36 | ; );\r | |
| 37 | ;------------------------------------------------------------------------------\r | |
| 38 | global ASM_PFX(InternalMemCompareMem)\r | |
| 39 | ASM_PFX(InternalMemCompareMem):\r | |
| 40 | push rsi\r | |
| 41 | push rdi\r | |
| 42 | mov rsi, rcx\r | |
| 43 | mov rdi, rdx\r | |
| 44 | mov rcx, r8\r | |
| 45 | repe cmpsb\r | |
| 46 | movzx rax, byte [rsi - 1]\r | |
| 47 | movzx rdx, byte [rdi - 1]\r | |
| 48 | sub rax, rdx\r | |
| 49 | pop rdi\r | |
| 50 | pop rsi\r | |
| 51 | ret\r | |
| 52 | \r |