projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 3402aac7 | 1 | ;------------------------------------------------------------------------------\r |
| d39eb83c | 2 | ;\r |
| 3 | ; SetMem() worker for ARM\r | |
| 4 | ;\r | |
| 5 | ; This file started out as C code that did 64 bit moves if the buffer was\r | |
| 6 | ; 32-bit aligned, else it does a byte copy. It also does a byte copy for\r | |
| 7 | ; any trailing bytes. It was updated to do 32-byte at a time.\r | |
| 8 | ;\r | |
| d6ebcab7 HT |
9 | ; Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r |
| 10 | ; This program and the accompanying materials\r | |
| d39eb83c | 11 | ; are licensed and made available under the terms and conditions of the BSD License\r |
| 12 | ; which accompanies this distribution. The full text of the license may be found at\r | |
| 13 | ; http://opensource.org/licenses/bsd-license.php\r | |
| 14 | ;\r | |
| 15 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 16 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 17 | ;\r | |
| 18 | \r | |
| 19 | /**\r | |
| 20 | Set Buffer to Value for Size bytes.\r | |
| 21 | \r | |
| 22 | @param Buffer Memory to set.\r | |
| 23 | @param Length Number of bytes to set\r | |
| 24 | @param Value Value of the set operation.\r | |
| 25 | \r | |
| 26 | @return Buffer\r | |
| 27 | \r | |
| 28 | VOID *\r | |
| 29 | EFIAPI\r | |
| 30 | InternalMemSetMem (\r | |
| 31 | OUT VOID *Buffer,\r | |
| 32 | IN UINTN Length,\r | |
| 33 | IN UINT8 Value\r | |
| 34 | )\r | |
| 35 | **/\r | |
| 3402aac7 | 36 | \r |
| 2ac288f9 | 37 | EXPORT InternalMemSetMem\r |
| 3402aac7 | 38 | \r |
| 2ac288f9 | 39 | AREA AsmMemStuff, CODE, READONLY\r |
| d39eb83c | 40 | \r |
| 41 | InternalMemSetMem\r | |
| 2ac288f9 | 42 | stmfd sp!, {r4-r11, lr}\r |
| 43 | tst r0, #3\r | |
| 44 | movne r3, #0\r | |
| 45 | moveq r3, #1\r | |
| 46 | cmp r1, #31\r | |
| 47 | movls lr, #0\r | |
| 48 | andhi lr, r3, #1\r | |
| 49 | cmp lr, #0\r | |
| 50 | mov r12, r0\r | |
| 51 | bne L31\r | |
| d39eb83c | 52 | L32\r |
| 2ac288f9 | 53 | mov r3, #0\r |
| 54 | b L43\r | |
| d39eb83c | 55 | L31\r |
| 56 | and r4, r2, #0xff\r | |
| 57 | orr r4, r4, r4, LSL #8\r | |
| 3402aac7 | 58 | orr r4, r4, r4, LSL #16\r |
| 2ac288f9 | 59 | mov r5, r4\r |
| 2ac288f9 | 60 | mov r6, r4\r |
| 3402aac7 RC |
61 | mov r7, r4\r |
| 62 | mov r8, r4\r | |
| 63 | mov r9, r4\r | |
| 64 | mov r10, r4\r | |
| 65 | mov r11, r4\r | |
| 2ac288f9 | 66 | b L32\r |
| d39eb83c | 67 | L34\r |
| 2ac288f9 | 68 | cmp lr, #0\r |
| 69 | streqb r2, [r12], #1\r | |
| 70 | subeq r1, r1, #1\r | |
| 71 | beq L43\r | |
| 72 | sub r1, r1, #32\r | |
| 73 | cmp r1, #31\r | |
| 74 | movls lr, r3\r | |
| 75 | stmia r12!, {r4-r11}\r | |
| d39eb83c | 76 | L43\r |
| 2ac288f9 | 77 | cmp r1, #0\r |
| 78 | bne L34\r | |
| 79 | ldmfd sp!, {r4-r11, pc}\r | |
| 3402aac7 | 80 | \r |
| d39eb83c | 81 | END\r |