[dev.cc] cmd/6a, cmd/6g etc: replace C implementations with Go implementations

Change-Id: I58e00a39cf63df07813d21453f91e68eef6a413c
Reviewed-on: https://go-review.googlesource.com/5635Reviewed-by: Rob Pike <r@golang.org>

src/cmd/5a/Makefile

-# Copyright 2012 The Go Authors.  All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-include ../../Make.dist
-
-install: y.tab.h
-
-y.tab.h: a.y
-	LANG=C LANGUAGE=en_US.UTF8 bison -d -v -y a.y

src/cmd/5a/a.h

-// Inferno utils/5a/a.h
-// http://code.google.com/p/inferno-os/source/browse/utils/5a/a.h
-//
-//	Copyright © 1994-1999 Lucent Technologies Inc.	All rights reserved.
-//	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
-//	Portions Copyright © 1997-1999 Vita Nuova Limited
-//	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
-//	Portions Copyright © 2004,2006 Bruce Ellis
-//	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
-//	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
-//	Portions Copyright © 2009 The Go Authors.  All rights reserved.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-#include <bio.h>
-#include <link.h>
-#include "../5l/5.out.h"
-
-#ifndef	EXTERN
-#define	EXTERN	extern
-#endif
-
-#undef	getc
-#undef	ungetc
-#undef	BUFSIZ
-
-#define	getc	ccgetc
-#define	ungetc	ccungetc
-
-typedef	struct	Sym	Sym;
-typedef	struct	Io	Io;
-
-#define	MAXALIGN	7
-#define	FPCHIP		1
-#define	NSYMB		8192
-#define	BUFSIZ		8192
-#define	HISTSZ		20
-#ifndef	EOF
-#define	EOF		(-1)
-#endif
-#define	IGN		(-2)
-#define	GETC()		((--fi.c < 0)? filbuf(): *fi.p++ & 0xff)
-#define	NHASH		503
-#define	STRINGSZ	200
-#define	NMACRO		10
-
-struct	Sym
-{
-	Sym*	link;
-	char*	macro;
-	int32	value;
-	ushort	type;
-	char	*name;
-	char*	labelname;
-	char	sym;
-};
-#define	S	((Sym*)0)
-
-EXTERN	struct
-{
-	char*	p;
-	int	c;
-} fi;
-
-struct	Io
-{
-	Io*	link;
-	char	b[BUFSIZ];
-	char*	p;
-	short	c;
-	short	f;
-};
-#define	I	((Io*)0)
-
-enum
-{
-	CLAST,
-	CMACARG,
-	CMACRO,
-	CPREPROC,
-	
-	Always = C_SCOND_NONE,
-};
-
-EXTERN	int	debug[256];
-EXTERN	Sym*	hash[NHASH];
-EXTERN	char**	Dlist;
-EXTERN	int	nDlist;
-EXTERN	int	newflag;
-EXTERN	char*	hunk;
-EXTERN	char**	include;
-EXTERN	Io*	iofree;
-EXTERN	Io*	ionext;
-EXTERN	Io*	iostack;
-EXTERN	int32	lineno;
-EXTERN	int	nerrors;
-EXTERN	int32	nhunk;
-EXTERN	int	ninclude;
-EXTERN	int32	nsymb;
-EXTERN	Addr	nullgen;
-EXTERN	char*	outfile;
-EXTERN	int	pass;
-EXTERN	int32	pc;
-EXTERN	int	peekc;
-EXTERN	int32	stmtline;
-EXTERN	int	sym;
-EXTERN	char*	symb;
-EXTERN	int	thechar;
-EXTERN	char*	thestring;
-EXTERN	int32	thunk;
-EXTERN	Biobuf	obuf;
-EXTERN	Link*	ctxt;
-EXTERN	Biobuf	bstdout;
-EXTERN	Prog*	lastpc;
-
-void*	alloc(int32);
-void*	allocn(void*, int32, int32);
-void	ensuresymb(int32);
-void	errorexit(void);
-void	pushio(void);
-void	newio(void);
-void	newfile(char*, int);
-Sym*	slookup(char*);
-Sym*	lookup(void);
-Sym*	labellookup(Sym*);
-void	settext(LSym*);
-void	syminit(Sym*);
-int32	yylex(void);
-int	getc(void);
-int	getnsc(void);
-void	unget(int);
-int	escchar(int);
-void	cinit(void);
-void	pinit(char*);
-void	cclean(void);
-int	isreg(Addr*);
-void	outcode(int, int, Addr*, int, Addr*);
-int	filbuf(void);
-Sym*	getsym(void);
-void	domacro(void);
-void	macund(void);
-void	macdef(void);
-void	macexpand(Sym*, char*);
-void	macinc(void);
-void	maclin(void);
-void	macprag(void);
-void	macif(int);
-void	macend(void);
-void	dodefine(char*);
-void	prfile(int32);
-void	linehist(char*, int);
-void	gethunk(void);
-void	yyerror(char*, ...);
-int	yyparse(void);
-void	setinclude(char*);
-int	assemble(char*);
-void	listinit(void);

src/cmd/5a/doc.go

-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-/*
-
-5a is a version of the Plan 9 assembler.  The original is documented at
-
-	http://plan9.bell-labs.com/magic/man2html/1/8a
-
-Go-specific considerations are documented at
-
-	http://golang.org/doc/asm
-
-Its target architecture is the ARM, referred to by these tools as arm.
-
-*/
-package main

src/cmd/5a/y.tab.h

-/* A Bison parser, made by GNU Bison 2.3.  */
-
-/* Skeleton interface for Bison's Yacc-like parsers in C
-
-   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
-   Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
-
-/* As a special exception, you may create a larger work that contains
-   part or all of the Bison parser skeleton and distribute that work
-   under terms of your choice, so long as that work isn't itself a
-   parser generator using the skeleton or a modified version thereof
-   as a parser skeleton.  Alternatively, if you modify or redistribute
-   the parser skeleton itself, you may (at your option) remove this
-   special exception, which will cause the skeleton and the resulting
-   Bison output files to be licensed under the GNU General Public
-   License without this special exception.
-
-   This special exception was added by the Free Software Foundation in
-   version 2.2 of Bison.  */
-
-/* Tokens.  */
-#ifndef YYTOKENTYPE
-# define YYTOKENTYPE
-   /* Put the tokens into the symbol table, so that GDB and other debuggers
-      know about them.  */
-   enum yytokentype {
-     LTYPE1 = 258,
-     LTYPE2 = 259,
-     LTYPE3 = 260,
-     LTYPE4 = 261,
-     LTYPE5 = 262,
-     LTYPE6 = 263,
-     LTYPE7 = 264,
-     LTYPE8 = 265,
-     LTYPE9 = 266,
-     LTYPEA = 267,
-     LTYPEB = 268,
-     LGLOBL = 269,
-     LTYPEC = 270,
-     LTYPED = 271,
-     LTYPEE = 272,
-     LTYPEG = 273,
-     LTYPEH = 274,
-     LTYPEI = 275,
-     LTYPEJ = 276,
-     LTYPEK = 277,
-     LTYPEL = 278,
-     LTYPEM = 279,
-     LTYPEN = 280,
-     LTYPEBX = 281,
-     LTYPEPLD = 282,
-     LCONST = 283,
-     LSP = 284,
-     LSB = 285,
-     LFP = 286,
-     LPC = 287,
-     LTYPEX = 288,
-     LTYPEPC = 289,
-     LTYPEF = 290,
-     LR = 291,
-     LREG = 292,
-     LF = 293,
-     LFREG = 294,
-     LC = 295,
-     LCREG = 296,
-     LPSR = 297,
-     LFCR = 298,
-     LCOND = 299,
-     LS = 300,
-     LAT = 301,
-     LFCONST = 302,
-     LSCONST = 303,
-     LNAME = 304,
-     LLAB = 305,
-     LVAR = 306
-   };
-#endif
-/* Tokens.  */
-#define LTYPE1 258
-#define LTYPE2 259
-#define LTYPE3 260
-#define LTYPE4 261
-#define LTYPE5 262
-#define LTYPE6 263
-#define LTYPE7 264
-#define LTYPE8 265
-#define LTYPE9 266
-#define LTYPEA 267
-#define LTYPEB 268
-#define LGLOBL 269
-#define LTYPEC 270
-#define LTYPED 271
-#define LTYPEE 272
-#define LTYPEG 273
-#define LTYPEH 274
-#define LTYPEI 275
-#define LTYPEJ 276
-#define LTYPEK 277
-#define LTYPEL 278
-#define LTYPEM 279
-#define LTYPEN 280
-#define LTYPEBX 281
-#define LTYPEPLD 282
-#define LCONST 283
-#define LSP 284
-#define LSB 285
-#define LFP 286
-#define LPC 287
-#define LTYPEX 288
-#define LTYPEPC 289
-#define LTYPEF 290
-#define LR 291
-#define LREG 292
-#define LF 293
-#define LFREG 294
-#define LC 295
-#define LCREG 296
-#define LPSR 297
-#define LFCR 298
-#define LCOND 299
-#define LS 300
-#define LAT 301
-#define LFCONST 302
-#define LSCONST 303
-#define LNAME 304
-#define LLAB 305
-#define LVAR 306
-
-
-
-
-#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
-typedef union YYSTYPE
-#line 39 "a.y"
-{
-	Sym	*sym;
-	int32	lval;
-	double	dval;
-	char	sval[8];
-	Addr	addr;
-}
-/* Line 1529 of yacc.c.  */
-#line 159 "y.tab.h"
-	YYSTYPE;
-# define yystype YYSTYPE /* obsolescent; will be withdrawn */
-# define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
-#endif
-
-extern YYSTYPE yylval;
-

src/cmd/5g/Makefile

-# Copyright 2012 The Go Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-include ../../Make.dist

src/cmd/5g/doc.go

-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-/*
-
-5g is the version of the gc compiler for the ARM.
-The $GOARCH for these tools is arm.
-
-It reads .go files and outputs .5 files. The flags are documented in ../gc/doc.go.
-
-*/
-package main

src/cmd/5g/galign.c

-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-#include <u.h>
-#include <libc.h>
-#include "gg.h"
-
-int	thechar	= '5';
-char*	thestring	= "arm";
-LinkArch*	thelinkarch = &linkarm;
-
-void
-linkarchinit(void)
-{
-}
-
-vlong MAXWIDTH = (1LL<<32) - 1;
-
-/*
- * go declares several platform-specific type aliases:
- * int, uint, float, and uintptr
- */
-Typedef	typedefs[] =
-{
-	{"int",		TINT,		TINT32},
-	{"uint",		TUINT,		TUINT32},
-	{"uintptr",	TUINTPTR,	TUINT32},
-	{0}
-};
-
-void
-betypeinit(void)
-{
-	widthptr = 4;
-	widthint = 4;
-	widthreg = 4;
-
-	listinit5();
-}
-
-void
-main(int argc, char **argv)
-{
-	thearch.thechar = thechar;
-	thearch.thestring = thestring;
-	thearch.thelinkarch = thelinkarch;
-	thearch.typedefs = typedefs;
-	thearch.REGSP = REGSP;
-	thearch.REGCTXT = REGCTXT;
-	thearch.MAXWIDTH = MAXWIDTH;
-	thearch.anyregalloc = anyregalloc;
-	thearch.betypeinit = betypeinit;
-	thearch.bgen = bgen;
-	thearch.cgen = cgen;
-	thearch.cgen_call = cgen_call;
-	thearch.cgen_callinter = cgen_callinter;
-	thearch.cgen_ret = cgen_ret;
-	thearch.clearfat = clearfat;
-	thearch.defframe = defframe;
-	thearch.excise = excise;
-	thearch.expandchecks = expandchecks;
-	thearch.gclean = gclean;
-	thearch.ginit = ginit;
-	thearch.gins = gins;
-	thearch.ginscall = ginscall;
-	thearch.igen = igen;
-	thearch.linkarchinit = linkarchinit;
-	thearch.peep = peep;
-	thearch.proginfo = proginfo;
-	thearch.regalloc = regalloc;
-	thearch.regfree = regfree;
-	thearch.regtyp = regtyp;
-	thearch.sameaddr = sameaddr;
-	thearch.smallindir = smallindir;
-	thearch.stackaddr = stackaddr;
-	thearch.excludedregs = excludedregs;
-	thearch.RtoB = RtoB;
-	thearch.FtoB = RtoB;
-	thearch.BtoR = BtoR;
-	thearch.BtoF = BtoF;
-	thearch.optoas = optoas;
-	thearch.doregbits = doregbits;
-	thearch.regnames = regnames;
-	
-	gcmain(argc, argv);
-}

src/cmd/5g/gg.h

-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-#ifndef	EXTERN
-#define	EXTERN	extern
-#endif
-
-#include "../gc/go.h"
-#include "../5l/5.out.h"
-
-enum
-{
-	REGALLOC_R0 = REG_R0,
-	REGALLOC_RMAX = REGEXT,
-	REGALLOC_F0 = REG_F0,
-	REGALLOC_FMAX = FREGEXT,
-};
-
-EXTERN	uchar	reg[REGALLOC_FMAX+1];
-extern	long	unmappedzero;
-
-/*
- * gen.c
- */
-void	compile(Node*);
-void	gen(Node*);
-Node*	lookdot(Node*, Node*, int);
-void	cgen_as(Node*, Node*);
-void	cgen_callmeth(Node*, int);
-void	cgen_callinter(Node*, Node*, int);
-void	cgen_proc(Node*, int);
-void	cgen_callret(Node*, Node*);
-void	cgen_dcl(Node*);
-int	needconvert(Type*, Type*);
-void	genconv(Type*, Type*);
-void	allocparams(void);
-void	checklabels(void);
-void	ginscall(Node*, int);
-
-/*
- * cgen
- */
-void	agen(Node*, Node*);
-Prog* cgenindex(Node *, Node *, int);
-void	igen(Node*, Node*, Node*);
-void agenr(Node *n, Node *a, Node *res);
-vlong	fieldoffset(Type*, Node*);
-void	sgen(Node*, Node*, int64);
-void	gmove(Node*, Node*);
-Prog*	gins(int, Node*, Node*);
-int	samaddr(Node*, Node*);
-void	raddr(Node *n, Prog *p);
-Prog*	gcmp(int, Node*, Node*);
-Prog*	gshift(int as, Node *lhs, int32 stype, int32 sval, Node *rhs);
-Prog *	gregshift(int as, Node *lhs, int32 stype, Node *reg, Node *rhs);
-void	naddr(Node*, Addr*, int);
-void	cgen_aret(Node*, Node*);
-void	cgen_hmul(Node*, Node*, Node*);
-void	cgen_shift(int, int, Node*, Node*, Node*);
-int	componentgen(Node*, Node*);
-
-/*
- * cgen64.c
- */
-void	cmp64(Node*, Node*, int, int, Prog*);
-void	cgen64(Node*, Node*);
-
-/*
- * gsubr.c
- */
-void	clearp(Prog*);
-Prog*	gbranch(int, Type*, int);
-Prog*	prog(int);
-void	gconv(int, int);
-int	conv2pt(Type*);
-vlong	convvtox(vlong, int);
-void	fnparam(Type*, int, int);
-Prog*	gop(int, Node*, Node*, Node*);
-int	optoas(int, Type*);
-void	ginit(void);
-void	gclean(void);
-void	regalloc(Node*, Type*, Node*);
-void	regfree(Node*);
-Node*	nodarg(Type*, int);
-void	nodreg(Node*, Type*, int);
-void	nodindreg(Node*, Type*, int);
-void	buildtxt(void);
-Plist*	newplist(void);
-int	isfat(Type*);
-int	dotaddable(Node*, Node*);
-void	sudoclean(void);
-int	sudoaddable(int, Node*, Addr*, int*);
-void	afunclit(Addr*, Node*);
-void	datagostring(Strlit*, Addr*);
-void	split64(Node*, Node*, Node*);
-void	splitclean(void);
-Node*	ncon(uint32 i);
-void	gtrack(Sym*);
-
-/*
- * obj.c
- */
-void	datastring(char*, int, Addr*);
-
-/*
- * list.c
- */
-void	listinit(void);
-
-void	zaddr(Biobuf*, Addr*, int, int);
-
-void afunclit(Addr*, Node*);
-int anyregalloc(void);
-void betypeinit(void);
-void bgen(Node*, int, int, Prog*);
-void cgen(Node*, Node*);
-void cgen_call(Node*, int);
-void cgen_callinter(Node*, Node*, int);
-void cgen_ret(Node*);
-void clearfat(Node*);
-void clearp(Prog*);
-void defframe(Prog*);
-int dgostringptr(Sym*, int, char*);
-int dgostrlitptr(Sym*, int, Strlit*);
-int dsname(Sym*, int, char*, int);
-int dsymptr(Sym*, int, Sym*, int);
-void dumpdata(void);
-void dumpit(char*, Flow*, int);
-void excise(Flow*);
-void expandchecks(Prog*);
-void fixautoused(Prog*);
-void gclean(void);
-void	gdata(Node*, Node*, int);
-void	gdatacomplex(Node*, Mpcplx*);
-void	gdatastring(Node*, Strlit*);
-void	ggloblnod(Node *nam);
-void	ggloblsym(Sym *s, int32 width, int8 flags);
-void ginit(void);
-Prog*	gins(int, Node*, Node*);
-void	ginscall(Node*, int);
-Prog*	gjmp(Prog*);
-void gtrack(Sym*);
-void	gused(Node*);
-void	igen(Node*, Node*, Node*);
-int isfat(Type*);
-void linkarchinit(void);
-void markautoused(Prog*);
-void naddr(Node*, Addr*, int);
-Plist* newplist(void);
-Node* nodarg(Type*, int);
-void patch(Prog*, Prog*);
-void proginfo(ProgInfo*, Prog*);
-void regalloc(Node*, Type*, Node*);
-void regfree(Node*);
-void regopt(Prog*);
-int regtyp(Addr*);
-int sameaddr(Addr*, Addr*);
-int smallindir(Addr*, Addr*);
-int stackaddr(Addr*);
-Prog* unpatch(Prog*);
-
-/*
- * reg.c
- */
-uint64 excludedregs(void);
-uint64 RtoB(int);
-uint64 FtoB(int);
-int BtoR(uint64);
-int BtoF(uint64);
-uint64 doregbits(int);
-char** regnames(int*);
-
-/*
- * peep.c
- */
-void peep(Prog*);

src/cmd/5g/prog.c

-// Copyright 2013 The Go Authors.  All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-#include <u.h>
-#include <libc.h>
-#include "gg.h"
-#include "../gc/popt.h"
-
-enum
-{
-	RightRdwr = RightRead | RightWrite,
-};
-
-// This table gives the basic information about instruction
-// generated by the compiler and processed in the optimizer.
-// See opt.h for bit definitions.
-//
-// Instructions not generated need not be listed.
-// As an exception to that rule, we typically write down all the
-// size variants of an operation even if we just use a subset.
-//
-// The table is formatted for 8-space tabs.
-static ProgInfo progtable[ALAST] = {
-	[ATYPE]=	{Pseudo | Skip},
-	[ATEXT]=	{Pseudo},
-	[AFUNCDATA]=	{Pseudo},
-	[APCDATA]=	{Pseudo},
-	[AUNDEF]=	{Break},
-	[AUSEFIELD]=	{OK},
-	[ACHECKNIL]=	{LeftRead},
-	[AVARDEF]=	{Pseudo | RightWrite},
-	[AVARKILL]=	{Pseudo | RightWrite},
-
-	// NOP is an internal no-op that also stands
-	// for USED and SET annotations, not the Intel opcode.
-	[ANOP]=		{LeftRead | RightWrite},
-	
-	// Integer.
-	[AADC]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[AADD]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[AAND]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ABIC]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ACMN]=		{SizeL | LeftRead | RightRead},
-	[ACMP]=		{SizeL | LeftRead | RightRead},
-	[ADIVU]=	{SizeL | LeftRead | RegRead | RightWrite},
-	[ADIV]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[AEOR]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[AMODU]=	{SizeL | LeftRead | RegRead | RightWrite},
-	[AMOD]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[AMULALU]=	{SizeL | LeftRead | RegRead | RightRdwr},
-	[AMULAL]=	{SizeL | LeftRead | RegRead | RightRdwr},
-	[AMULA]=	{SizeL | LeftRead | RegRead | RightRdwr},
-	[AMULU]=	{SizeL | LeftRead | RegRead | RightWrite},
-	[AMUL]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[AMULL]=	{SizeL | LeftRead | RegRead | RightWrite},
-	[AMULLU]=	{SizeL | LeftRead | RegRead | RightWrite},
-	[AMVN]=		{SizeL | LeftRead | RightWrite},
-	[AORR]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ARSB]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ARSC]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ASBC]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ASLL]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ASRA]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ASRL]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ASUB]=		{SizeL | LeftRead | RegRead | RightWrite},
-	[ATEQ]=		{SizeL | LeftRead | RightRead},
-	[ATST]=		{SizeL | LeftRead | RightRead},
-
-	// Floating point.
-	[AADDD]=	{SizeD | LeftRead | RightRdwr},
-	[AADDF]=	{SizeF | LeftRead | RightRdwr},
-	[ACMPD]=	{SizeD | LeftRead | RightRead},
-	[ACMPF]=	{SizeF | LeftRead | RightRead},
-	[ADIVD]=	{SizeD | LeftRead | RightRdwr},
-	[ADIVF]=	{SizeF | LeftRead | RightRdwr},
-	[AMULD]=	{SizeD | LeftRead | RightRdwr},
-	[AMULF]=	{SizeF | LeftRead | RightRdwr},
-	[ASUBD]=	{SizeD | LeftRead | RightRdwr},
-	[ASUBF]=	{SizeF | LeftRead | RightRdwr},
-
-	// Conversions.
-	[AMOVWD]=		{SizeD | LeftRead | RightWrite | Conv},
-	[AMOVWF]=		{SizeF | LeftRead | RightWrite | Conv},
-	[AMOVDF]=		{SizeF | LeftRead | RightWrite | Conv},
-	[AMOVDW]=		{SizeL | LeftRead | RightWrite | Conv},
-	[AMOVFD]=		{SizeD | LeftRead | RightWrite | Conv},
-	[AMOVFW]=		{SizeL | LeftRead | RightWrite | Conv},
-
-	// Moves.
-	[AMOVB]=		{SizeB | LeftRead | RightWrite | Move},
-	[AMOVD]=		{SizeD | LeftRead | RightWrite | Move},
-	[AMOVF]=		{SizeF | LeftRead | RightWrite | Move},
-	[AMOVH]=		{SizeW | LeftRead | RightWrite | Move},
-	[AMOVW]=		{SizeL | LeftRead | RightWrite | Move},
-	// In addtion, duffzero reads R0,R1 and writes R1.  This fact is
-	// encoded in peep.c
-	[ADUFFZERO]=		{Call},
-	// In addtion, duffcopy reads R1,R2 and writes R0,R1,R2.  This fact is
-	// encoded in peep.c
-	[ADUFFCOPY]=		{Call},
-
-	// These should be split into the two different conversions instead
-	// of overloading the one.
-	[AMOVBS]=		{SizeB | LeftRead | RightWrite | Conv},
-	[AMOVBU]=		{SizeB | LeftRead | RightWrite | Conv},
-	[AMOVHS]=		{SizeW | LeftRead | RightWrite | Conv},
-	[AMOVHU]=		{SizeW | LeftRead | RightWrite | Conv},
-	
-	// Jumps.
-	[AB]=		{Jump | Break},
-	[ABL]=		{Call},
-	[ABEQ]=		{Cjmp},
-	[ABNE]=		{Cjmp},
-	[ABCS]=		{Cjmp},
-	[ABHS]=		{Cjmp},
-	[ABCC]=		{Cjmp},
-	[ABLO]=		{Cjmp},
-	[ABMI]=		{Cjmp},
-	[ABPL]=		{Cjmp},
-	[ABVS]=		{Cjmp},
-	[ABVC]=		{Cjmp},
-	[ABHI]=		{Cjmp},
-	[ABLS]=		{Cjmp},
-	[ABGE]=		{Cjmp},
-	[ABLT]=		{Cjmp},
-	[ABGT]=		{Cjmp},
-	[ABLE]=		{Cjmp},
-	[ARET]=		{Break},
-};
-
-void
-proginfo(ProgInfo *info, Prog *p)
-{
-	*info = progtable[p->as];
-	if(info->flags == 0)
-		fatal("unknown instruction %P", p);
-
-	if(p->from.type == TYPE_ADDR && p->from.sym != nil && (info->flags & LeftRead)) {
-		info->flags &= ~LeftRead;
-		info->flags |= LeftAddr;
-	}
-
-	if((info->flags & RegRead) && p->reg == 0) {
-		info->flags &= ~RegRead;
-		info->flags |= CanRegRead | RightRead;
-	}
-	
-	if(((p->scond & C_SCOND) != C_SCOND_NONE) && (info->flags & RightWrite))
-		info->flags |= RightRead;
-	
-	switch(p->as) {
-	case ADIV:
-	case ADIVU:
-	case AMOD:
-	case AMODU:
-		info->regset |= RtoB(REG_R12);
-		break;
-	}
-}

src/cmd/6a/Makefile

-# Copyright 2012 The Go Authors.  All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-include ../../Make.dist
-
-install: y.tab.h
-
-y.tab.h: a.y
-	LANG=C LANGUAGE=en_US.UTF8 bison -d -v -y a.y

src/cmd/6a/doc.go

-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-/*
-
-6a is a version of the Plan 9 assembler.  The original is documented at
-
-	http://plan9.bell-labs.com/magic/man2html/1/8a
-
-Go-specific considerations are documented at
-
-	http://golang.org/doc/asm
-
-Its target architecture is the x86-64, referred to by these tools as amd64.
-
-*/
-package main

src/cmd/6g/Makefile

-# Copyright 2012 The Go Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-include ../../Make.dist

src/cmd/6g/doc.go

-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-/*
-
-6g is the version of the gc compiler for the x86-64.
-The $GOARCH for these tools is amd64.
-
-It reads .go files and outputs .6 files. The flags are documented in ../gc/doc.go.
-
-*/
-package main

src/cmd/8a/Makefile

-# Copyright 2012 The Go Authors.  All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-include ../../Make.dist
-
-install: y.tab.h
-
-y.tab.h: a.y
-	LANG=C LANGUAGE=en_US.UTF8 bison -d -v -y a.y

src/cmd/8g/Makefile

-# Copyright 2012 The Go Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-include ../../Make.dist