1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 #include "textflag.h" 6 7 TEXT runtimememclrNoHeapPointers(SB),NOSPLIT,$0-8 8 MOVL ptr+0(FP), DI 9 MOVL n+4(FP), CX 10 MOVQ CX, BX 11 ANDQ $3, BX 12 SHRQ $2, CX 13 MOVQ $0, AX 14 CLD 15 REP 16 STOSL 17 MOVQ BX, CX 18 REP 19 STOSB 20 // Note: we zero only 4 bytes at a time so that the tail is at most 21 // 3 bytes. That guarantees that we aren't zeroing pointers with STOSB. 22 // See issue 13160. 23 RET 24
