projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| a37f6605 AB |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>\r | |
| 4 | ;\r | |
| 5 | ; This program and the accompanying materials are licensed and made available\r | |
| 6 | ; under the terms and conditions of the BSD License which accompanies this\r | |
| 7 | ; distribution. The full text of the license may be found at\r | |
| 8 | ; http://opensource.org/licenses/bsd-license.php\r | |
| 9 | ;\r | |
| 10 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 11 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 12 | ;\r | |
| 13 | ;------------------------------------------------------------------------------\r | |
| 14 | \r | |
| 15 | EXPORT InternalMemZeroMem\r | |
| 16 | EXPORT InternalMemSetMem\r | |
| 17 | EXPORT InternalMemSetMem16\r | |
| 18 | EXPORT InternalMemSetMem32\r | |
| 19 | EXPORT InternalMemSetMem64\r | |
| 20 | \r | |
| 21 | AREA SetMem, CODE, READONLY, CODEALIGN, ALIGN=5\r | |
| 22 | THUMB\r | |
| 23 | \r | |
| 24 | InternalMemZeroMem\r | |
| 25 | movs r2, #0\r | |
| 26 | \r | |
| 27 | InternalMemSetMem\r | |
| 28 | uxtb r2, r2\r | |
| 29 | orr r2, r2, r2, lsl #8\r | |
| 30 | \r | |
| 31 | InternalMemSetMem16\r | |
| 32 | uxth r2, r2\r | |
| 33 | orr r2, r2, r2, lsr #16\r | |
| 34 | \r | |
| 35 | InternalMemSetMem32\r | |
| 36 | mov r3, r2\r | |
| 37 | \r | |
| 38 | InternalMemSetMem64\r | |
| 39 | push {r4, lr}\r | |
| 40 | cmp r1, #16 ; fewer than 16 bytes of input?\r | |
| 41 | add r1, r1, r0 ; r1 := dst + length\r | |
| 42 | add lr, r0, #16\r | |
| 43 | blt L2\r | |
| 44 | bic lr, lr, #15 ; align output pointer\r | |
| 45 | \r | |
| 46 | str r2, [r0] ; potentially unaligned store of 4 bytes\r | |
| 47 | str r3, [r0, #4] ; potentially unaligned store of 4 bytes\r | |
| 48 | str r2, [r0, #8] ; potentially unaligned store of 4 bytes\r | |
| 49 | str r3, [r0, #12] ; potentially unaligned store of 4 bytes\r | |
| 50 | beq L1\r | |
| 51 | \r | |
| 52 | L0\r | |
| 53 | add lr, lr, #16 ; advance the output pointer by 16 bytes\r | |
| 54 | subs r4, r1, lr ; past the output?\r | |
| 55 | blt L3 ; break out of the loop\r | |
| 56 | strd r2, r3, [lr, #-16] ; aligned store of 16 bytes\r | |
| 57 | strd r2, r3, [lr, #-8]\r | |
| 58 | bne L0 ; goto beginning of loop\r | |
| 59 | L1\r | |
| 60 | pop {r4, pc}\r | |
| 61 | \r | |
| 62 | L2\r | |
| 63 | subs r4, r1, lr\r | |
| 64 | L3\r | |
| 65 | adds r4, r4, #16\r | |
| 66 | subs r1, r1, #8\r | |
| 67 | cmp r4, #4 ; between 4 and 15 bytes?\r | |
| 68 | blt L4\r | |
| 69 | cmp r4, #8 ; between 8 and 15 bytes?\r | |
| 70 | str r2, [lr, #-16] ; overlapping store of 4 + (4 + 4) + 4 bytes\r | |
| 71 | itt gt\r | |
| 72 | strgt r3, [lr, #-12]\r | |
| 73 | strgt r2, [r1]\r | |
| 74 | str r3, [r1, #4]\r | |
| 75 | pop {r4, pc}\r | |
| 76 | \r | |
| 77 | L4\r | |
| 78 | cmp r4, #2 ; 2 or 3 bytes?\r | |
| 79 | strb r2, [lr, #-16] ; store 1 byte\r | |
| 80 | it ge\r | |
| 81 | strhge r2, [r1, #6] ; store 2 bytes\r | |
| 82 | pop {r4, pc}\r | |
| 83 | \r | |
| 84 | END\r |