summaryrefslogtreecommitdiff
path: root/src/cmd/5c/gc.h
blob: 40d3a2b07095cca3efd25e2930d892868845a119 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
// Inferno utils/5c/gc.h
// http://code.google.com/p/inferno-os/source/browse/utils/5c/gc.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	<u.h>
#include	"../cc/cc.h"
#include	"../5l/5.out.h"

/*
 * 5c/arm
 * Arm 7500
 */
#define	SZ_CHAR		1
#define	SZ_SHORT	2
#define	SZ_INT		4
#define	SZ_LONG		4
#define	SZ_IND		4
#define	SZ_FLOAT	4
#define	SZ_VLONG	8
#define	SZ_DOUBLE	8
#define	FNX		100

typedef	struct	Case	Case;
typedef	struct	C1	C1;
typedef	struct	Multab	Multab;
typedef	struct	Hintab	Hintab;
typedef	struct	Reg	Reg;
typedef	struct	Rgn	Rgn;


#define	R0ISZERO	0

#define	A	((Addr*)0)

#define	INDEXED	9
#define	P	((Prog*)0)

struct	Case
{
	Case*	link;
	int32	val;
	int32	label;
	char	def;
	char	isv;
};
#define	C	((Case*)0)

struct	C1
{
	int32	val;
	int32	label;
};

struct	Multab
{
	int32	val;
	char	code[20];
};

struct	Hintab
{
	ushort	val;
	char	hint[10];
};

struct	Reg
{
	int32	pc;
	int32	rpo;		/* reverse post ordering */

	Bits	set;
	Bits	use1;
	Bits	use2;

	Bits	refbehind;
	Bits	refahead;
	Bits	calbehind;
	Bits	calahead;
	Bits	regdiff;
	Bits	act;

	int32	regu;
	int32	loop;		/* could be shorter */


	Reg*	log5;
	int32	active;

	Reg*	p1;
	Reg*	p2;
	Reg*	p2link;
	Reg*	s1;
	Reg*	s2;
	Reg*	link;
	Prog*	prog;
};
#define	R	((Reg*)0)

#define	NRGN	600
struct	Rgn
{
	Reg*	enter;
	short	cost;
	short	varno;
	short	regno;
};

EXTERN	int32	breakpc;
EXTERN	int32	nbreak;
EXTERN	Case*	cases;
EXTERN	Node	constnode;
EXTERN	Node	fconstnode;
EXTERN	int32	continpc;
EXTERN	int32	curarg;
EXTERN	int32	cursafe;
EXTERN	int32	isbigendian;
EXTERN	Prog*	lastp;
EXTERN	int32	maxargsafe;
EXTERN	int	mnstring;
EXTERN	Multab	multab[20];
EXTERN	int	retok;
extern	int	hintabsize;
EXTERN	Node*	nodrat;
EXTERN	Node*	nodret;
EXTERN	Node*	nodsafe;
EXTERN	int32	nrathole;
EXTERN	int32	nstring;
EXTERN	Prog*	p;
EXTERN	int32	pc;
EXTERN	Node	regnode;
EXTERN	char	string[NSNAME];
EXTERN	Sym*	symrathole;
EXTERN	Node	znode;
EXTERN	Prog	zprog;
EXTERN	char	reg[NREG+NFREG];
EXTERN	int32	exregoffset;
EXTERN	int32	exfregoffset;
EXTERN	int	suppress;

#define	BLOAD(r)	band(bnot(r->refbehind), r->refahead)
#define	BSTORE(r)	band(bnot(r->calbehind), r->calahead)
#define	LOAD(r)		(~r->refbehind.b[z] & r->refahead.b[z])
#define	STORE(r)	(~r->calbehind.b[z] & r->calahead.b[z])

#define	bset(a,n)	((a).b[(n)/32]&(1L<<(n)%32))

#define	CLOAD	4
#define	CREF	5
#define	CINF	1000
#define	LOOP	3

EXTERN	Rgn	region[NRGN];
EXTERN	Rgn*	rgp;
EXTERN	int	nregion;
EXTERN	int	nvar;

EXTERN	Bits	externs;
EXTERN	Bits	params;
EXTERN	Bits	consts;
EXTERN	Bits	addrs;

EXTERN	int32	regbits;
EXTERN	int32	exregbits;

EXTERN	int	change;

EXTERN	Reg*	firstr;
EXTERN	Reg*	lastr;
EXTERN	Reg	zreg;
EXTERN	Reg*	freer;
EXTERN	int32*	idom;
EXTERN	Reg**	rpo2r;
EXTERN	int32	maxnr;

extern	char*	anames[];
extern	Hintab	hintab[];

/*
 * sgen.c
 */
void	codgen(Node*, Node*);
void	gen(Node*);
void	noretval(int);
void	usedset(Node*, int);
void	xcom(Node*);
int	bcomplex(Node*, Node*);
Prog*	gtext(Sym*, int32);
vlong	argsize(void);

/*
 * cgen.c
 */
void	cgen(Node*, Node*);
void	reglcgen(Node*, Node*, Node*);
void	lcgen(Node*, Node*);
void	bcgen(Node*, int);
void	boolgen(Node*, int, Node*);
void	sugen(Node*, Node*, int32);
void	layout(Node*, Node*, int, int, Node*);
void	cgenrel(Node*, Node*);

/*
 * txt.c
 */
void	ginit(void);
void	gclean(void);
void	nextpc(void);
void	gargs(Node*, Node*, Node*);
void	garg1(Node*, Node*, Node*, int, Node**);
Node*	nodconst(int32);
Node*	nod32const(vlong);
Node*	nodfconst(double);
void	nodreg(Node*, Node*, int);
void	regret(Node*, Node*);
int	tmpreg(void);
void	regalloc(Node*, Node*, Node*);
void	regfree(Node*);
void	regialloc(Node*, Node*, Node*);
void	regsalloc(Node*, Node*);
void	regaalloc1(Node*, Node*);
void	regaalloc(Node*, Node*);
void	regind(Node*, Node*);
void	gprep(Node*, Node*);
void	raddr(Node*, Prog*);
void	naddr(Node*, Addr*);
void	gmovm(Node*, Node*, int);
void	gmove(Node*, Node*);
void	gmover(Node*, Node*);
void	gins(int a, Node*, Node*);
void	gopcode(int, Node*, Node*, Node*);
int	samaddr(Node*, Node*);
void	gbranch(int);
void	patch(Prog*, int32);
int	sconst(Node*);
int	sval(int32);
void	gpseudo(int, Sym*, Node*);
void	gprefetch(Node*);
void	gpcdata(int, int);

/*
 * swt.c
 */
int	swcmp(const void*, const void*);
void	doswit(Node*);
void	swit1(C1*, int, int32, Node*);
void	swit2(C1*, int, int32, Node*);
void	newcase(void);
void	bitload(Node*, Node*, Node*, Node*, Node*);
void	bitstore(Node*, Node*, Node*, Node*, Node*);
int	mulcon(Node*, Node*);
Multab*	mulcon0(int32);
void	nullwarn(Node*, Node*);
void	outcode(void);

/*
 * list
 */
void	listinit(void);

/*
 * reg.c
 */
Reg*	rega(void);
int	rcmp(const void*, const void*);
void	regopt(Prog*);
void	addmove(Reg*, int, int, int);
Bits	mkvar(Addr*, int);
void	prop(Reg*, Bits, Bits);
void	loopit(Reg*, int32);
void	synch(Reg*, Bits);
uint32	allreg(uint32, Rgn*);
void	paint1(Reg*, int);
uint32	paint2(Reg*, int);
void	paint3(Reg*, int, int32, int);
void	addreg(Addr*, int);

/*
 * peep.c
 */
void	peep(void);
void	excise(Reg*);
Reg*	uniqp(Reg*);
Reg*	uniqs(Reg*);
int	regtyp(Addr*);
int	regzer(Addr*);
int	anyvar(Addr*);
int	subprop(Reg*);
int	copyprop(Reg*);
int	shiftprop(Reg*);
void	constprop(Addr*, Addr*, Reg*);
int	copy1(Addr*, Addr*, Reg*, int);
int	copyu(Prog*, Addr*, Addr*);

int	copyas(Addr*, Addr*);
int	copyau(Addr*, Addr*);
int	copyau1(Prog*, Addr*);
int	copysub(Addr*, Addr*, Addr*, int);
int	copysub1(Prog*, Addr*, Addr*, int);

int32	RtoB(int);
int32	FtoB(int);
int	BtoR(int32);
int	BtoF(int32);

void	predicate(void);
int	isbranch(Prog *);
int	predicable(Prog *p);
int	modifiescpsr(Prog *p);