| // Copyright 2014 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| #include "textflag.h" |
| |
| // void runtime·memmove(void*, void*, uintptr) |
| TEXT runtime·memmove(SB), NOSPLIT, $-8-24 |
| MOVD to+0(FP), R3 |
| MOVD from+8(FP), R4 |
| MOVD n+16(FP), R5 |
| CMP $0, R5 |
| BNE check |
| RET |
| |
| check: |
| CMP R3, R4 |
| BLT backward |
| |
| ADD R3, R5 |
| loop: |
| MOVBU.P 1(R4), R6 |
| MOVBU.P R6, 1(R3) |
| CMP R3, R5 |
| BNE loop |
| RET |
| |
| backward: |
| ADD R5, R4 |
| ADD R3, R5 |
| loop1: |
| MOVBU.W -1(R4), R6 |
| MOVBU.W R6, -1(R5) |
| CMP R3, R5 |
| BNE loop1 |
| RET |
