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https://github.com/golang/go
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copy tweaks
* move memmove to arch-specific subdirectories * add memmove for arm * add copyright notices marking them as copied from Inferno R=ken2 https://golang.org/cl/156061
This commit is contained in:
Russ Cox
parent
ea5cc6c021
commit
ed0beea27b
90
src/pkg/runtime/386/memmove.s
Normal file
90
src/pkg/runtime/386/memmove.s
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@ -0,0 +1,90 @@
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// Inferno's libkern/memmove-386.s
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// http://code.google.com/p/inferno-os/source/browse/libkern/memmove-386.s
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//
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// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
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// Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved.
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// Portions Copyright 2009 The Go Authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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TEXT memmove(SB), $0
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MOVL to+0(FP), DI
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MOVL fr+4(FP), SI
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MOVL n+8(FP), BX
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JLT fault
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/*
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* check and set for backwards
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* should we look closer for overlap?
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*/
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CMPL SI, DI
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JLS back
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/*
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* foreward copy loop
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*/
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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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MOVL to+0(FP),AX
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RET
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/*
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* whole thing backwards has
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* adjusted addresses
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*/
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back:
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ADDL BX, DI
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ADDL BX, SI
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STD
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/*
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* copy
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*/
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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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MOVL to+0(FP),AX
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RET
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/*
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* if called with negative count,
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* treat as error rather than
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* rotating all of memory
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*/
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fault:
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MOVL $0,SI
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MOVL 0(SI), AX
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RET
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@ -49,6 +49,7 @@ OFILES=\
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mcache.$O\
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mcentral.$O\
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mem.$O\
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memmove.$O\
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mfixalloc.$O\
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mgc0.$O\
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mheap.$O\
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@ -68,7 +69,6 @@ OFILES=\
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sys.$O\
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thread.$O\
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traceback.$O\
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memmove_$(GOARCH).$O\
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$(OFILES_$(GOARCH))\
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HFILES=\
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90
src/pkg/runtime/amd64/memmove.s
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90
src/pkg/runtime/amd64/memmove.s
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@ -0,0 +1,90 @@
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// Derived from Inferno's libkern/memmove-386.s (adapted for amd64)
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// http://code.google.com/p/inferno-os/source/browse/libkern/memmove-386.s
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//
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// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
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// Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved.
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// Portions Copyright 2009 The Go Authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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TEXT memmove(SB), $0
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MOVQ to+0(FP), DI
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MOVQ fr+8(FP), SI
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MOVLQSX n+16(FP), BX
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JLT fault
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/*
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* check and set for backwards
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* should we look closer for overlap?
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*/
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CMPQ SI, DI
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JLS back
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/*
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* foreward copy loop
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*/
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MOVQ BX, CX
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SHRQ $3, CX
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ANDQ $7, BX
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REP; MOVSQ
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MOVQ BX, CX
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REP; MOVSB
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MOVQ to+0(FP),AX
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RET
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/*
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* whole thing backwards has
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* adjusted addresses
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*/
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back:
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ADDQ BX, DI
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ADDQ BX, SI
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STD
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/*
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* copy
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*/
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MOVQ BX, CX
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SHRQ $3, CX
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ANDQ $7, BX
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SUBQ $8, DI
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SUBQ $8, SI
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REP; MOVSQ
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ADDQ $7, DI
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ADDQ $7, SI
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MOVQ BX, CX
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REP; MOVSB
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CLD
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MOVQ to+0(FP),AX
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RET
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/*
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* if called with negative count,
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* treat as error rather than
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* rotating all of memory
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*/
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fault:
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MOVQ $0,SI
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MOVQ 0(SI), AX
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RET
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@ -1,65 +0,0 @@
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TEXT memmove(SB), $0
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MOVL to+0(FP), DI
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MOVL fr+4(FP), SI
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MOVL n+8(FP), BX
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JLT fault
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/*
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* check and set for backwards
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* should we look closer for overlap?
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*/
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CMPL SI, DI
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JLS back
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/*
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* foreward copy loop
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*/
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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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MOVL to+0(FP),AX
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RET
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/*
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* whole thing backwards has
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* adjusted addresses
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*/
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back:
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ADDL BX, DI
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ADDL BX, SI
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STD
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/*
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* copy
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*/
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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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MOVL to+0(FP),AX
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RET
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/*
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* if called with negative count,
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* treat as error rather than
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* rotating all of memory
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*/
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fault:
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MOVL $0,SI
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MOVL 0(SI), AX
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RET
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@ -1,65 +0,0 @@
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TEXT memmove(SB), $0
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MOVQ to+0(FP), DI
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MOVQ fr+8(FP), SI
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MOVLQSX n+16(FP), BX
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JLT fault
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/*
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* check and set for backwards
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* should we look closer for overlap?
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*/
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CMPQ SI, DI
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JLS back
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/*
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* foreward copy loop
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*/
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MOVQ BX, CX
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SHRQ $3, CX
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ANDQ $7, BX
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REP; MOVSQ
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MOVQ BX, CX
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REP; MOVSB
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MOVQ to+0(FP),AX
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RET
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/*
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* whole thing backwards has
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* adjusted addresses
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*/
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back:
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ADDQ BX, DI
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ADDQ BX, SI
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STD
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/*
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* copy
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*/
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MOVQ BX, CX
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SHRQ $3, CX
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ANDQ $7, BX
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SUBQ $8, DI
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SUBQ $8, SI
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REP; MOVSQ
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ADDQ $7, DI
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ADDQ $7, SI
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MOVQ BX, CX
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REP; MOVSB
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CLD
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MOVQ to+0(FP),AX
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RET
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/*
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* if called with negative count,
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* treat as error rather than
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* rotating all of memory
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*/
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fault:
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MOVQ $0,SI
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MOVQ 0(SI), AX
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RET
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