1*e4b17023SJohn Marino /* Generate from machine description:
2*e4b17023SJohn Marino - some flags HAVE_... saying which simple standard instructions are
3*e4b17023SJohn Marino available for this machine.
4*e4b17023SJohn Marino Copyright (C) 1987, 1991, 1995, 1998, 1999, 2000, 2003, 2004, 2007, 2010
5*e4b17023SJohn Marino Free Software Foundation, Inc.
6*e4b17023SJohn Marino
7*e4b17023SJohn Marino This file is part of GCC.
8*e4b17023SJohn Marino
9*e4b17023SJohn Marino GCC is free software; you can redistribute it and/or modify it under
10*e4b17023SJohn Marino the terms of the GNU General Public License as published by the Free
11*e4b17023SJohn Marino Software Foundation; either version 3, or (at your option) any later
12*e4b17023SJohn Marino version.
13*e4b17023SJohn Marino
14*e4b17023SJohn Marino GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15*e4b17023SJohn Marino WARRANTY; without even the implied warranty of MERCHANTABILITY or
16*e4b17023SJohn Marino FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17*e4b17023SJohn Marino for more details.
18*e4b17023SJohn Marino
19*e4b17023SJohn Marino You should have received a copy of the GNU General Public License
20*e4b17023SJohn Marino along with GCC; see the file COPYING3. If not see
21*e4b17023SJohn Marino <http://www.gnu.org/licenses/>. */
22*e4b17023SJohn Marino
23*e4b17023SJohn Marino
24*e4b17023SJohn Marino #include "bconfig.h"
25*e4b17023SJohn Marino #include "system.h"
26*e4b17023SJohn Marino #include "coretypes.h"
27*e4b17023SJohn Marino #include "tm.h"
28*e4b17023SJohn Marino #include "rtl.h"
29*e4b17023SJohn Marino #include "obstack.h"
30*e4b17023SJohn Marino #include "errors.h"
31*e4b17023SJohn Marino #include "read-md.h"
32*e4b17023SJohn Marino #include "gensupport.h"
33*e4b17023SJohn Marino
34*e4b17023SJohn Marino /* Obstack to remember insns with. */
35*e4b17023SJohn Marino static struct obstack obstack;
36*e4b17023SJohn Marino
37*e4b17023SJohn Marino /* Max size of names encountered. */
38*e4b17023SJohn Marino static int max_id_len;
39*e4b17023SJohn Marino
40*e4b17023SJohn Marino /* Max operand encountered in a scan over some insn. */
41*e4b17023SJohn Marino static int max_opno;
42*e4b17023SJohn Marino
43*e4b17023SJohn Marino static void max_operand_1 (rtx);
44*e4b17023SJohn Marino static int num_operands (rtx);
45*e4b17023SJohn Marino static void gen_proto (rtx);
46*e4b17023SJohn Marino static void gen_macro (const char *, int, int);
47*e4b17023SJohn Marino static void gen_insn (int, rtx);
48*e4b17023SJohn Marino
49*e4b17023SJohn Marino /* Count the number of match_operand's found. */
50*e4b17023SJohn Marino
51*e4b17023SJohn Marino static void
max_operand_1(rtx x)52*e4b17023SJohn Marino max_operand_1 (rtx x)
53*e4b17023SJohn Marino {
54*e4b17023SJohn Marino RTX_CODE code;
55*e4b17023SJohn Marino int i;
56*e4b17023SJohn Marino int len;
57*e4b17023SJohn Marino const char *fmt;
58*e4b17023SJohn Marino
59*e4b17023SJohn Marino if (x == 0)
60*e4b17023SJohn Marino return;
61*e4b17023SJohn Marino
62*e4b17023SJohn Marino code = GET_CODE (x);
63*e4b17023SJohn Marino
64*e4b17023SJohn Marino if (code == MATCH_OPERAND || code == MATCH_OPERATOR
65*e4b17023SJohn Marino || code == MATCH_PARALLEL)
66*e4b17023SJohn Marino max_opno = MAX (max_opno, XINT (x, 0));
67*e4b17023SJohn Marino
68*e4b17023SJohn Marino fmt = GET_RTX_FORMAT (code);
69*e4b17023SJohn Marino len = GET_RTX_LENGTH (code);
70*e4b17023SJohn Marino for (i = 0; i < len; i++)
71*e4b17023SJohn Marino {
72*e4b17023SJohn Marino if (fmt[i] == 'e' || fmt[i] == 'u')
73*e4b17023SJohn Marino max_operand_1 (XEXP (x, i));
74*e4b17023SJohn Marino else if (fmt[i] == 'E')
75*e4b17023SJohn Marino {
76*e4b17023SJohn Marino int j;
77*e4b17023SJohn Marino for (j = 0; j < XVECLEN (x, i); j++)
78*e4b17023SJohn Marino max_operand_1 (XVECEXP (x, i, j));
79*e4b17023SJohn Marino }
80*e4b17023SJohn Marino }
81*e4b17023SJohn Marino }
82*e4b17023SJohn Marino
83*e4b17023SJohn Marino static int
num_operands(rtx insn)84*e4b17023SJohn Marino num_operands (rtx insn)
85*e4b17023SJohn Marino {
86*e4b17023SJohn Marino int len = XVECLEN (insn, 1);
87*e4b17023SJohn Marino int i;
88*e4b17023SJohn Marino
89*e4b17023SJohn Marino max_opno = -1;
90*e4b17023SJohn Marino
91*e4b17023SJohn Marino for (i = 0; i < len; i++)
92*e4b17023SJohn Marino max_operand_1 (XVECEXP (insn, 1, i));
93*e4b17023SJohn Marino
94*e4b17023SJohn Marino return max_opno + 1;
95*e4b17023SJohn Marino }
96*e4b17023SJohn Marino
97*e4b17023SJohn Marino /* Print out a wrapper macro for a function which corrects the number
98*e4b17023SJohn Marino of arguments it takes. Any missing arguments are assumed to be at
99*e4b17023SJohn Marino the end. */
100*e4b17023SJohn Marino static void
gen_macro(const char * name,int real,int expect)101*e4b17023SJohn Marino gen_macro (const char *name, int real, int expect)
102*e4b17023SJohn Marino {
103*e4b17023SJohn Marino int i;
104*e4b17023SJohn Marino
105*e4b17023SJohn Marino gcc_assert (real <= expect);
106*e4b17023SJohn Marino gcc_assert (real);
107*e4b17023SJohn Marino
108*e4b17023SJohn Marino /* #define GEN_CALL(A, B, C, D) gen_call((A), (B)) */
109*e4b17023SJohn Marino fputs ("#define GEN_", stdout);
110*e4b17023SJohn Marino for (i = 0; name[i]; i++)
111*e4b17023SJohn Marino putchar (TOUPPER (name[i]));
112*e4b17023SJohn Marino
113*e4b17023SJohn Marino putchar('(');
114*e4b17023SJohn Marino for (i = 0; i < expect - 1; i++)
115*e4b17023SJohn Marino printf ("%c, ", i + 'A');
116*e4b17023SJohn Marino printf ("%c) gen_%s (", i + 'A', name);
117*e4b17023SJohn Marino
118*e4b17023SJohn Marino for (i = 0; i < real - 1; i++)
119*e4b17023SJohn Marino printf ("(%c), ", i + 'A');
120*e4b17023SJohn Marino printf ("(%c))\n", i + 'A');
121*e4b17023SJohn Marino }
122*e4b17023SJohn Marino
123*e4b17023SJohn Marino /* Print out prototype information for a generator function. If the
124*e4b17023SJohn Marino insn pattern has been elided, print out a dummy generator that
125*e4b17023SJohn Marino does nothing. */
126*e4b17023SJohn Marino
127*e4b17023SJohn Marino static void
gen_proto(rtx insn)128*e4b17023SJohn Marino gen_proto (rtx insn)
129*e4b17023SJohn Marino {
130*e4b17023SJohn Marino int num = num_operands (insn);
131*e4b17023SJohn Marino int i;
132*e4b17023SJohn Marino const char *name = XSTR (insn, 0);
133*e4b17023SJohn Marino int truth = maybe_eval_c_test (XSTR (insn, 2));
134*e4b17023SJohn Marino
135*e4b17023SJohn Marino /* Many md files don't refer to the last two operands passed to the
136*e4b17023SJohn Marino call patterns. This means their generator functions will be two
137*e4b17023SJohn Marino arguments too short. Instead of changing every md file to touch
138*e4b17023SJohn Marino those operands, we wrap the prototypes in macros that take the
139*e4b17023SJohn Marino correct number of arguments. */
140*e4b17023SJohn Marino if (name[0] == 'c' || name[0] == 's')
141*e4b17023SJohn Marino {
142*e4b17023SJohn Marino if (!strcmp (name, "call")
143*e4b17023SJohn Marino || !strcmp (name, "call_pop")
144*e4b17023SJohn Marino || !strcmp (name, "sibcall")
145*e4b17023SJohn Marino || !strcmp (name, "sibcall_pop"))
146*e4b17023SJohn Marino gen_macro (name, num, 4);
147*e4b17023SJohn Marino else if (!strcmp (name, "call_value")
148*e4b17023SJohn Marino || !strcmp (name, "call_value_pop")
149*e4b17023SJohn Marino || !strcmp (name, "sibcall_value")
150*e4b17023SJohn Marino || !strcmp (name, "sibcall_value_pop"))
151*e4b17023SJohn Marino gen_macro (name, num, 5);
152*e4b17023SJohn Marino }
153*e4b17023SJohn Marino
154*e4b17023SJohn Marino if (truth != 0)
155*e4b17023SJohn Marino printf ("extern rtx gen_%-*s (", max_id_len, name);
156*e4b17023SJohn Marino else
157*e4b17023SJohn Marino printf ("static inline rtx gen_%-*s (", max_id_len, name);
158*e4b17023SJohn Marino
159*e4b17023SJohn Marino if (num == 0)
160*e4b17023SJohn Marino fputs ("void", stdout);
161*e4b17023SJohn Marino else
162*e4b17023SJohn Marino {
163*e4b17023SJohn Marino for (i = 1; i < num; i++)
164*e4b17023SJohn Marino fputs ("rtx, ", stdout);
165*e4b17023SJohn Marino
166*e4b17023SJohn Marino fputs ("rtx", stdout);
167*e4b17023SJohn Marino }
168*e4b17023SJohn Marino
169*e4b17023SJohn Marino puts (");");
170*e4b17023SJohn Marino
171*e4b17023SJohn Marino /* Some back ends want to take the address of generator functions,
172*e4b17023SJohn Marino so we cannot simply use #define for these dummy definitions. */
173*e4b17023SJohn Marino if (truth == 0)
174*e4b17023SJohn Marino {
175*e4b17023SJohn Marino printf ("static inline rtx\ngen_%s", name);
176*e4b17023SJohn Marino if (num > 0)
177*e4b17023SJohn Marino {
178*e4b17023SJohn Marino putchar ('(');
179*e4b17023SJohn Marino for (i = 0; i < num-1; i++)
180*e4b17023SJohn Marino printf ("rtx ARG_UNUSED (%c), ", 'a' + i);
181*e4b17023SJohn Marino printf ("rtx ARG_UNUSED (%c))\n", 'a' + i);
182*e4b17023SJohn Marino }
183*e4b17023SJohn Marino else
184*e4b17023SJohn Marino puts ("(void)");
185*e4b17023SJohn Marino puts ("{\n return 0;\n}");
186*e4b17023SJohn Marino }
187*e4b17023SJohn Marino
188*e4b17023SJohn Marino }
189*e4b17023SJohn Marino
190*e4b17023SJohn Marino static void
gen_insn(int line_no,rtx insn)191*e4b17023SJohn Marino gen_insn (int line_no, rtx insn)
192*e4b17023SJohn Marino {
193*e4b17023SJohn Marino const char *name = XSTR (insn, 0);
194*e4b17023SJohn Marino const char *p;
195*e4b17023SJohn Marino const char *lt, *gt;
196*e4b17023SJohn Marino int len;
197*e4b17023SJohn Marino int truth = maybe_eval_c_test (XSTR (insn, 2));
198*e4b17023SJohn Marino
199*e4b17023SJohn Marino lt = strchr (name, '<');
200*e4b17023SJohn Marino if (lt && strchr (lt + 1, '>'))
201*e4b17023SJohn Marino {
202*e4b17023SJohn Marino message_with_line (line_no, "unresolved iterator");
203*e4b17023SJohn Marino have_error = 1;
204*e4b17023SJohn Marino return;
205*e4b17023SJohn Marino }
206*e4b17023SJohn Marino
207*e4b17023SJohn Marino gt = strchr (name, '>');
208*e4b17023SJohn Marino if (lt || gt)
209*e4b17023SJohn Marino {
210*e4b17023SJohn Marino message_with_line (line_no,
211*e4b17023SJohn Marino "unmatched angle brackets, likely "
212*e4b17023SJohn Marino "an error in iterator syntax");
213*e4b17023SJohn Marino have_error = 1;
214*e4b17023SJohn Marino return;
215*e4b17023SJohn Marino }
216*e4b17023SJohn Marino
217*e4b17023SJohn Marino /* Don't mention instructions whose names are the null string
218*e4b17023SJohn Marino or begin with '*'. They are in the machine description just
219*e4b17023SJohn Marino to be recognized. */
220*e4b17023SJohn Marino if (name[0] == 0 || name[0] == '*')
221*e4b17023SJohn Marino return;
222*e4b17023SJohn Marino
223*e4b17023SJohn Marino len = strlen (name);
224*e4b17023SJohn Marino
225*e4b17023SJohn Marino if (len > max_id_len)
226*e4b17023SJohn Marino max_id_len = len;
227*e4b17023SJohn Marino
228*e4b17023SJohn Marino if (truth == 0)
229*e4b17023SJohn Marino /* Emit nothing. */;
230*e4b17023SJohn Marino else if (truth == 1)
231*e4b17023SJohn Marino printf ("#define HAVE_%s 1\n", name);
232*e4b17023SJohn Marino else
233*e4b17023SJohn Marino {
234*e4b17023SJohn Marino /* Write the macro definition, putting \'s at the end of each line,
235*e4b17023SJohn Marino if more than one. */
236*e4b17023SJohn Marino printf ("#define HAVE_%s (", name);
237*e4b17023SJohn Marino for (p = XSTR (insn, 2); *p; p++)
238*e4b17023SJohn Marino {
239*e4b17023SJohn Marino if (IS_VSPACE (*p))
240*e4b17023SJohn Marino fputs (" \\\n", stdout);
241*e4b17023SJohn Marino else
242*e4b17023SJohn Marino putchar (*p);
243*e4b17023SJohn Marino }
244*e4b17023SJohn Marino fputs (")\n", stdout);
245*e4b17023SJohn Marino }
246*e4b17023SJohn Marino
247*e4b17023SJohn Marino obstack_grow (&obstack, &insn, sizeof (rtx));
248*e4b17023SJohn Marino }
249*e4b17023SJohn Marino
250*e4b17023SJohn Marino int
main(int argc,char ** argv)251*e4b17023SJohn Marino main (int argc, char **argv)
252*e4b17023SJohn Marino {
253*e4b17023SJohn Marino rtx desc;
254*e4b17023SJohn Marino rtx dummy;
255*e4b17023SJohn Marino rtx *insns;
256*e4b17023SJohn Marino rtx *insn_ptr;
257*e4b17023SJohn Marino
258*e4b17023SJohn Marino progname = "genflags";
259*e4b17023SJohn Marino obstack_init (&obstack);
260*e4b17023SJohn Marino
261*e4b17023SJohn Marino /* We need to see all the possibilities. Elided insns may have
262*e4b17023SJohn Marino direct calls to their generators in C code. */
263*e4b17023SJohn Marino insn_elision = 0;
264*e4b17023SJohn Marino
265*e4b17023SJohn Marino if (!init_rtx_reader_args (argc, argv))
266*e4b17023SJohn Marino return (FATAL_EXIT_CODE);
267*e4b17023SJohn Marino
268*e4b17023SJohn Marino puts ("/* Generated automatically by the program `genflags'");
269*e4b17023SJohn Marino puts (" from the machine description file `md'. */\n");
270*e4b17023SJohn Marino puts ("#ifndef GCC_INSN_FLAGS_H");
271*e4b17023SJohn Marino puts ("#define GCC_INSN_FLAGS_H\n");
272*e4b17023SJohn Marino
273*e4b17023SJohn Marino /* Read the machine description. */
274*e4b17023SJohn Marino
275*e4b17023SJohn Marino while (1)
276*e4b17023SJohn Marino {
277*e4b17023SJohn Marino int line_no, insn_code_number = 0;
278*e4b17023SJohn Marino
279*e4b17023SJohn Marino desc = read_md_rtx (&line_no, &insn_code_number);
280*e4b17023SJohn Marino if (desc == NULL)
281*e4b17023SJohn Marino break;
282*e4b17023SJohn Marino if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
283*e4b17023SJohn Marino gen_insn (line_no, desc);
284*e4b17023SJohn Marino }
285*e4b17023SJohn Marino
286*e4b17023SJohn Marino /* Print out the prototypes now. */
287*e4b17023SJohn Marino dummy = (rtx) 0;
288*e4b17023SJohn Marino obstack_grow (&obstack, &dummy, sizeof (rtx));
289*e4b17023SJohn Marino insns = XOBFINISH (&obstack, rtx *);
290*e4b17023SJohn Marino
291*e4b17023SJohn Marino for (insn_ptr = insns; *insn_ptr; insn_ptr++)
292*e4b17023SJohn Marino gen_proto (*insn_ptr);
293*e4b17023SJohn Marino
294*e4b17023SJohn Marino puts("\n#endif /* GCC_INSN_FLAGS_H */");
295*e4b17023SJohn Marino
296*e4b17023SJohn Marino if (have_error || ferror (stdout) || fflush (stdout) || fclose (stdout))
297*e4b17023SJohn Marino return FATAL_EXIT_CODE;
298*e4b17023SJohn Marino
299*e4b17023SJohn Marino return SUCCESS_EXIT_CODE;
300*e4b17023SJohn Marino }
301