| // Copyright 2013 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" |
| |
| TEXT runtime·memmove(SB), NOSPLIT, $0-12 |
| MOVL to+0(FP), DI |
| MOVL from+4(FP), SI |
| MOVL n+8(FP), BX |
| |
| CMPL SI, DI |
| JLS back |
| |
| forward: |
| MOVL BX, CX |
| SHRL $3, CX |
| ANDL $7, BX |
| REP; MOVSQ |
| MOVL BX, CX |
| REP; MOVSB |
| RET |
| |
| back: |
| MOVL SI, CX |
| ADDL BX, CX |
| CMPL CX, DI |
| JLS forward |
| |
| ADDL BX, DI |
| ADDL BX, SI |
| STD |
| |
| MOVL BX, CX |
| SHRL $3, CX |
| ANDL $7, BX |
| SUBL $8, DI |
| SUBL $8, SI |
| REP; MOVSQ |
| ADDL $7, DI |
| ADDL $7, SI |
| MOVL BX, CX |
| REP; MOVSB |
| CLD |
| |
| RET |
