projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| db75a3d6 JJ |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r | |
| 4 | ; 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 | |
| 14 | ; SetMem32.nasm\r | |
| 15 | ;\r | |
| 16 | ; Abstract:\r | |
| 17 | ;\r | |
| 18 | ; SetMem32 function\r | |
| 19 | ;\r | |
| 20 | ; Notes:\r | |
| 21 | ;\r | |
| 22 | ;------------------------------------------------------------------------------\r | |
| 23 | \r | |
| 24 | DEFAULT REL\r | |
| 25 | SECTION .text\r | |
| 26 | \r | |
| 27 | ;------------------------------------------------------------------------------\r | |
| 28 | ; VOID *\r | |
| 29 | ; InternalMemSetMem32 (\r | |
| 30 | ; IN VOID *Buffer,\r | |
| 31 | ; IN UINTN Count,\r | |
| 32 | ; IN UINT32 Value\r | |
| 33 | ; )\r | |
| 34 | ;------------------------------------------------------------------------------\r | |
| 35 | global ASM_PFX(InternalMemSetMem32)\r | |
| 36 | ASM_PFX(InternalMemSetMem32):\r | |
| 37 | DB 0x49, 0xf, 0x6e, 0xc0 ; movd mm0, r8 (Value)\r | |
| 38 | mov rax, rcx ; rax <- Buffer\r | |
| 39 | xchg rcx, rdx ; rcx <- Count rdx <- Buffer\r | |
| 40 | shr rcx, 1 ; rcx <- # of qwords to set\r | |
| 41 | jz @SetDwords\r | |
| 42 | DB 0xf, 0x70, 0xC0, 0x44 ; pshufw mm0, mm0, 44h\r | |
| 43 | .0:\r | |
| 44 | DB 0xf, 0xe7, 0x2 ; movntq [rdx], mm0\r | |
| 45 | lea rdx, [rdx + 8] ; use "lea" to avoid flag changes\r | |
| 46 | loop .0\r | |
| 47 | mfence\r | |
| 48 | @SetDwords:\r | |
| 49 | jnc .1\r | |
| 50 | DB 0xf, 0x7e, 0x2 ; movd [rdx], mm0\r | |
| 51 | .1:\r | |
| 52 | ret\r | |
| 53 | \r |