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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 "../../cmd/ld/textflag.h"
// void runtime·memclr(void*, uintptr)
TEXT runtime·memclr(SB), NOSPLIT, $0-16
MOVQ ptr+0(FP), DI
MOVQ n+8(FP), BX
XORQ AX, AX
clr_tail:
TESTQ BX, BX
JEQ clr_0
CMPQ BX, $2
JBE clr_1or2
CMPQ BX, $4
JBE clr_3or4
CMPQ BX, $8
JBE clr_5through8
CMPQ BX, $16
JBE clr_9through16
MOVQ BX, CX
SHRQ $2, CX
REP
STOSQ
ANDQ $3, BX
JNE clr_tail
RET
clr_1or2:
MOVB AX, (DI)
MOVB AX, -1(DI)(BX*1)
clr_0:
RET
clr_3or4:
MOVW AX, (DI)
MOVW AX, -2(DI)(BX*1)
RET
clr_5through8:
MOVL AX, (DI)
MOVL AX, -4(DI)(BX*1)
RET
clr_9through16:
MOVQ AX, (DI)
MOVQ AX, -8(DI)(BX*1)
RET
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