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41 lines
639 B
ArmAsm
41 lines
639 B
ArmAsm
// Copyright 2014 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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// +build ppc64 ppc64le
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#include "textflag.h"
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// void runtime·memmove(void*, void*, uintptr)
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TEXT runtime·memmove(SB), NOSPLIT, $-8-24
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MOVD to+0(FP), R3
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MOVD from+8(FP), R4
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MOVD n+16(FP), R5
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CMP R5, $0
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BNE check
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RETURN
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check:
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CMP R3, R4
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BGT backward
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SUB $1, R3
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ADD R3, R5
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SUB $1, R4
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loop:
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MOVBU 1(R4), R6
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MOVBU R6, 1(R3)
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CMP R3, R5
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BNE loop
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RETURN
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backward:
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ADD R5, R4
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ADD R3, R5
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loop1:
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MOVBU -1(R4), R6
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MOVBU R6, -1(R5)
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CMP R3, R5
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BNE loop1
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RETURN
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