projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| e1f414b6 | 1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| c33c6476 HT |
3 | ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r |
| 4 | ; This program and the accompanying materials\r | |
| e1f414b6 | 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 | ; SetMem.asm\r | |
| 15 | ;\r | |
| 16 | ; Abstract:\r | |
| 17 | ;\r | |
| 18 | ; SetMem function\r | |
| 19 | ;\r | |
| 20 | ; Notes:\r | |
| 21 | ;\r | |
| 22 | ;------------------------------------------------------------------------------\r | |
| 23 | \r | |
| 24 | .686\r | |
| 25 | .model flat,C\r | |
| 26 | .xmm\r | |
| 27 | .code\r | |
| 28 | \r | |
| 29 | ;------------------------------------------------------------------------------\r | |
| 30 | ; VOID *\r | |
| 31 | ; EFIAPI\r | |
| 32 | ; InternalMemSetMem (\r | |
| 33 | ; IN VOID *Buffer,\r | |
| 34 | ; IN UINTN Count,\r | |
| 35 | ; IN UINT8 Value\r | |
| 36 | ; );\r | |
| 37 | ;------------------------------------------------------------------------------\r | |
| 38 | InternalMemSetMem PROC USES edi\r | |
| 39 | mov edx, [esp + 12] ; edx <- Count\r | |
| 40 | mov edi, [esp + 8] ; edi <- Buffer\r | |
| 41 | mov al, [esp + 16] ; al <- Value\r | |
| 42 | xor ecx, ecx\r | |
| 43 | sub ecx, edi\r | |
| 44 | and ecx, 15 ; ecx + edi aligns on 16-byte boundary\r | |
| 45 | jz @F\r | |
| 46 | cmp ecx, edx\r | |
| 47 | cmova ecx, edx\r | |
| 48 | sub edx, ecx\r | |
| 49 | rep stosb\r | |
| 50 | @@:\r | |
| 51 | mov ecx, edx\r | |
| 52 | and edx, 15\r | |
| 53 | shr ecx, 4 ; ecx <- # of DQwords to set\r | |
| 54 | jz @SetBytes\r | |
| 55 | mov ah, al ; ax <- Value | (Value << 8)\r | |
| 56 | add esp, -16\r | |
| 57 | movdqu [esp], xmm0 ; save xmm0\r | |
| 58 | movd xmm0, eax\r | |
| 59 | pshuflw xmm0, xmm0, 0 ; xmm0[0..63] <- Value repeats 8 times\r | |
| 60 | movlhps xmm0, xmm0 ; xmm0 <- Value repeats 16 times\r | |
| 61 | @@:\r | |
| 62 | movntdq [edi], xmm0 ; edi should be 16-byte aligned\r | |
| 63 | add edi, 16\r | |
| 64 | loop @B\r | |
| 65 | mfence\r | |
| 66 | movdqu xmm0, [esp] ; restore xmm0\r | |
| 67 | add esp, 16 ; stack cleanup\r | |
| 68 | @SetBytes:\r | |
| 69 | mov ecx, edx\r | |
| 70 | rep stosb\r | |
| 71 | mov eax, [esp + 8] ; eax <- Buffer as return value\r | |
| 72 | ret\r | |
| 73 | InternalMemSetMem ENDP\r | |
| 74 | \r | |
| 75 | END\r |