memclr_plan9_amd64.s

Documentation: runtime

     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)
    10TEXT 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

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