| // 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 |