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 | .text\r | |
| 16 | .thumb\r | |
| 17 | .syntax unified\r | |
| 18 | .align 5\r | |
| 19 | ASM_GLOBAL ASM_PFX(InternalMemZeroMem)\r | |
| 20 | ASM_PFX(InternalMemZeroMem):\r | |
| 21 | movs r2, #0\r | |
| 22 | \r | |
| 23 | ASM_GLOBAL ASM_PFX(InternalMemSetMem)\r | |
| 24 | ASM_PFX(InternalMemSetMem):\r | |
| 25 | uxtb r2, r2\r | |
| 26 | orr r2, r2, r2, lsl #8\r | |
| 27 | \r | |
| 28 | ASM_GLOBAL ASM_PFX(InternalMemSetMem16)\r | |
| 29 | ASM_PFX(InternalMemSetMem16):\r | |
| 30 | uxth r2, r2\r | |
| 31 | orr r2, r2, r2, lsl #16\r | |
| 32 | \r | |
| 33 | ASM_GLOBAL ASM_PFX(InternalMemSetMem32)\r | |
| 34 | ASM_PFX(InternalMemSetMem32):\r | |
| 35 | mov r3, r2\r | |
| 36 | \r | |
| 37 | ASM_GLOBAL ASM_PFX(InternalMemSetMem64)\r | |
| 38 | ASM_PFX(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 2f\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 1f\r | |
| 51 | \r | |
| 52 | 0: add lr, lr, #16 // advance the output pointer by 16 bytes\r | |
| 53 | subs r4, r1, lr // past the output?\r | |
| 54 | blt 3f // break out of the loop\r | |
| 55 | strd r2, r3, [lr, #-16] // aligned store of 16 bytes\r | |
| 56 | strd r2, r3, [lr, #-8]\r | |
| 57 | bne 0b // goto beginning of loop\r | |
| 58 | 1: pop {r4, pc}\r | |
| 59 | \r | |
| 60 | 2: subs r4, r1, lr\r | |
| 61 | 3: adds r4, r4, #16\r | |
| 62 | subs r1, r1, #8\r | |
| 63 | cmp r4, #4 // between 4 and 15 bytes?\r | |
| 64 | blt 4f\r | |
| 65 | cmp r4, #8 // between 8 and 15 bytes?\r | |
| 66 | str r2, [lr, #-16] // overlapping store of 4 + (4 + 4) + 4 bytes\r | |
| 67 | itt gt\r | |
| 68 | strgt r3, [lr, #-12]\r | |
| 69 | strgt r2, [r1]\r | |
| 70 | str r3, [r1, #4]\r | |
| 71 | pop {r4, pc}\r | |
| 72 | \r | |
| 73 | 4: cmp r4, #2 // 2 or 3 bytes?\r | |
| 74 | strb r2, [lr, #-16] // store 1 byte\r | |
| 75 | it ge\r | |
| 76 | strhge r2, [r1, #6] // store 2 bytes\r | |
| 77 | pop {r4, pc}\r |