| // Copyright 2016 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·memclrNoHeapPointers(void*, uintptr) | |
| TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-16 | |
| MOV ptr+0(FP), T1 | |
| MOV n+8(FP), T2 | |
| ADD T1, T2, T4 | |
| // If less than eight bytes, do one byte at a time. | |
| SLTU $8, T2, T3 | |
| BNE T3, ZERO, outcheck | |
| // Do one byte at a time until eight-aligned. | |
| JMP aligncheck | |
| align: | |
| MOVB ZERO, (T1) | |
| ADD $1, T1 | |
| aligncheck: | |
| AND $7, T1, T3 | |
| BNE T3, ZERO, align | |
| // Do eight bytes at a time as long as there is room. | |
| ADD $-7, T4, T5 | |
| JMP wordscheck | |
| words: | |
| MOV ZERO, (T1) | |
| ADD $8, T1 | |
| wordscheck: | |
| SLTU T5, T1, T3 | |
| BNE T3, ZERO, words | |
| JMP outcheck | |
| out: | |
| MOVB ZERO, (T1) | |
| ADD $1, T1 | |
| outcheck: | |
| BNE T1, T4, out | |
| done: | |
| RET |