文件操作 - memclr_plan9_amd64.s
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文件: /usr/share/go-1.23/src/runtime/memclr_plan9_amd64.s
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// 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" // See memclrNoHeapPointers Go doc for important implementation constraints. // func memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr) TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-16 MOVQ ptr+0(FP), DI MOVQ n+8(FP), CX MOVQ CX, BX ANDQ $7, BX SHRQ $3, CX MOVQ $0, AX CLD REP STOSQ MOVQ BX, CX REP STOSB RET
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