github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/runtime/memclr_plan9_amd64.s (about)

     1  // Copyright 2014 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  // See memclrNoHeapPointers Go doc for important implementation constraints.
     8  
     9  // func memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr)
    10  TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-16
    11  	MOVQ	ptr+0(FP), DI
    12  	MOVQ	n+8(FP), CX
    13  	MOVQ	CX, BX
    14  	ANDQ	$7, BX
    15  	SHRQ	$3, CX
    16  	MOVQ	$0, AX
    17  	CLD
    18  	REP
    19  	STOSQ
    20  	MOVQ	BX, CX
    21  	REP
    22  	STOSB
    23  	RET