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https://github.com/golang/go
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851f30136d
Collapse the arch,os-specific directories into the main directory by renaming xxx/foo.c to foo_xxx.c, and so on. There are no substantial edits here, except to the Makefile. The assumption is that the Go tool will #define GOOS_darwin and GOARCH_amd64 and will make any file named something like signals_darwin.h available as signals_GOOS.h during the build. This replaces what used to be done with -I$(GOOS). There is still work to be done to make runtime build with standard tools, but this is a big step. After this we will have to write a script to generate all the generated files so they can be checked in (instead of generated during the build). R=r, iant, r, lucio.dere CC=golang-dev https://golang.org/cl/5490053
87 lines
2.0 KiB
ArmAsm
87 lines
2.0 KiB
ArmAsm
// 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 runtime·memmove(SB), 7, $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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/*
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* check and set for backwards
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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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* forward copy loop
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*/
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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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MOVL to+0(FP),AX
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RET
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/*
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* check overlap
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*/
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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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/*
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* whole thing backwards has
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* adjusted addresses
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*/
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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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