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https://github.com/golang/go
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c007ce824d
Preparation was in CL 134570043. This CL contains only the effect of 'hg mv src/pkg/* src'. For more about the move, see golang.org/s/go14nopkg.
47 lines
631 B
ArmAsm
47 lines
631 B
ArmAsm
// Copyright 2013 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·memmove(SB), NOSPLIT, $0-12
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MOVL to+0(FP), DI
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MOVL from+4(FP), SI
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MOVL n+8(FP), BX
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CMPL SI, DI
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JLS back
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forward:
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MOVL BX, CX
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SHRL $3, CX
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ANDL $7, BX
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REP; MOVSQ
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MOVL BX, CX
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REP; MOVSB
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RET
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back:
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MOVL SI, CX
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ADDL BX, CX
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CMPL CX, DI
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JLS forward
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ADDL BX, DI
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ADDL BX, SI
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STD
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MOVL BX, CX
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SHRL $3, CX
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ANDL $7, BX
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SUBL $8, DI
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SUBL $8, SI
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REP; MOVSQ
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ADDL $7, DI
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ADDL $7, SI
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MOVL BX, CX
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REP; MOVSB
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CLD
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RET
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