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24 lines
535 B
ArmAsm
24 lines
535 B
ArmAsm
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "textflag.h"
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TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-8
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MOVL ptr+0(FP), DI
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MOVL n+4(FP), CX
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MOVQ CX, BX
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ANDQ $3, BX
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SHRQ $2, CX
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MOVQ $0, AX
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CLD
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REP
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STOSL
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MOVQ BX, CX
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REP
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STOSB
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// Note: we zero only 4 bytes at a time so that the tail is at most
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// 3 bytes. That guarantees that we aren't zeroing pointers with STOSB.
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// See issue 13160.
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RET
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