projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 8605247f JJ |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 17634d02 | 3 | ; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
| 9344f092 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 8605247f JJ |
5 | ;\r |
| 6 | ; Module Name:\r | |
| 7 | ;\r | |
| 8 | ; InterlockedDecrement.Asm\r | |
| 9 | ;\r | |
| 10 | ; Abstract:\r | |
| 11 | ;\r | |
| 12 | ; InterlockedDecrement function\r | |
| 13 | ;\r | |
| 14 | ; Notes:\r | |
| 15 | ;\r | |
| 16 | ;------------------------------------------------------------------------------\r | |
| 17 | \r | |
| 18 | SECTION .text\r | |
| 19 | \r | |
| 20 | ;------------------------------------------------------------------------------\r | |
| 21 | ; UINT32\r | |
| 22 | ; EFIAPI\r | |
| 23 | ; InternalSyncDecrement (\r | |
| 4cee954e | 24 | ; IN volatile UINT32 *Value\r |
| 8605247f JJ |
25 | ; );\r |
| 26 | ;------------------------------------------------------------------------------\r | |
| 27 | global ASM_PFX(InternalSyncDecrement)\r | |
| 28 | ASM_PFX(InternalSyncDecrement):\r | |
| 17634d02 RN |
29 | mov ecx, [esp + 4]\r |
| 30 | mov eax, 0FFFFFFFFh\r | |
| 31 | lock xadd dword [ecx], eax\r | |
| 32 | dec eax\r | |
| 8605247f | 33 | ret\r |