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https://github.com/golang/go
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5fea2ccc77
The tree's pretty inconsistent about single space vs double space after a period in documentation. Make it consistently a single space, per earlier decisions. This means contributors won't be confused by misleading precedence. This CL doesn't use go/doc to parse. It only addresses // comments. It was generated with: $ perl -i -npe 's,^(\s*// .+[a-z]\.) +([A-Z]),$1 $2,' $(git grep -l -E '^\s*//(.+\.) +([A-Z])') $ go test go/doc -update Change-Id: Iccdb99c37c797ef1f804a94b22ba5ee4b500c4f7 Reviewed-on: https://go-review.googlesource.com/20022 Reviewed-by: Rob Pike <r@golang.org> Reviewed-by: Dave Day <djd@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
53 lines
932 B
ArmAsm
53 lines
932 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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// This could use MOVSQ, but we use MOVSL so that if an object ends in
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// a 4 byte pointer, we copy it as a unit instead of byte by byte.
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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 $2, CX
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ANDL $3, BX
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REP; MOVSL
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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 $2, CX
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ANDL $3, BX
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SUBL $4, DI
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SUBL $4, SI
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REP; MOVSL
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ADDL $3, DI
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ADDL $3, SI
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MOVL BX, CX
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REP; MOVSB
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CLD
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// Note: we copy 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 copying pointers with MOVSB.
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// See issue 13160.
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RET
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