| // Copyright 2009 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·memclrNoHeapPointers(SB),NOSPLIT,$0-8 | |
| MOVL ptr+0(FP), DI | |
| MOVL n+4(FP), CX | |
| MOVQ CX, BX | |
| ANDQ $3, BX | |
| SHRQ $2, CX | |
| MOVQ $0, AX | |
| CLD | |
| REP | |
| STOSL | |
| MOVQ BX, CX | |
| REP | |
| STOSB | |
| // Note: we zero only 4 bytes at a time so that the tail is at most | |
| // 3 bytes. That guarantees that we aren't zeroing pointers with STOSB. | |
| // See issue 13160. | |
| RET |