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64a93ac5 | 1 | /* Declarations for interface to insn recognizer and insn-output.c. |
af841dbd JL |
2 | Copyright (C) 1987, 1996, 1997, 1998, |
3 | 1999, 2000 Free Software Foundation, Inc. | |
64a93ac5 CH |
4 | |
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
e99215a3 RK |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
64a93ac5 | 21 | |
f62a15e3 BS |
22 | /* Random number that should be large enough for all purposes. */ |
23 | #define MAX_RECOG_ALTERNATIVES 30 | |
24 | ||
0eadeb15 BS |
25 | /* Types of operands. */ |
26 | enum op_type { | |
27 | OP_IN, | |
28 | OP_OUT, | |
29 | OP_INOUT | |
30 | }; | |
31 | ||
f62a15e3 BS |
32 | struct operand_alternative |
33 | { | |
34 | /* Pointer to the beginning of the constraint string for this alternative, | |
35 | for easier access by alternative number. */ | |
9b3142b3 | 36 | const char *constraint; |
f62a15e3 BS |
37 | |
38 | /* The register class valid for this alternative (possibly NO_REGS). */ | |
39 | enum reg_class class; | |
40 | ||
41 | /* "Badness" of this alternative, computed from number of '?' and '!' | |
42 | characters in the constraint string. */ | |
43 | unsigned int reject; | |
44 | ||
45 | /* -1 if no matching constraint was found, or an operand number. */ | |
46 | int matches; | |
47 | /* The same information, but reversed: -1 if this operand is not | |
48 | matched by any other, or the operand number of the operand that | |
49 | matches this one. */ | |
50 | int matched; | |
51 | ||
52 | /* Nonzero if '&' was found in the constraint string. */ | |
53 | unsigned int earlyclobber:1; | |
54 | /* Nonzero if 'm' was found in the constraint string. */ | |
55 | unsigned int memory_ok:1; | |
56 | /* Nonzero if 'o' was found in the constraint string. */ | |
57 | unsigned int offmem_ok:1; | |
58 | /* Nonzero if 'V' was found in the constraint string. */ | |
59 | unsigned int nonoffmem_ok:1; | |
60 | /* Nonzero if '<' was found in the constraint string. */ | |
61 | unsigned int decmem_ok:1; | |
62 | /* Nonzero if '>' was found in the constraint string. */ | |
63 | unsigned int incmem_ok:1; | |
64 | /* Nonzero if 'X' was found in the constraint string, or if the constraint | |
65 | string for this alternative was empty. */ | |
66 | unsigned int anything_ok:1; | |
67 | }; | |
68 | ||
69 | ||
13536812 KG |
70 | extern void init_recog PARAMS ((void)); |
71 | extern void init_recog_no_volatile PARAMS ((void)); | |
72 | extern int recog_memoized PARAMS ((rtx)); | |
73 | extern int check_asm_operands PARAMS ((rtx)); | |
74 | extern int asm_operand_ok PARAMS ((rtx, const char *)); | |
75 | extern int validate_change PARAMS ((rtx, rtx *, rtx, int)); | |
76 | extern int apply_change_group PARAMS ((void)); | |
77 | extern int num_validated_changes PARAMS ((void)); | |
78 | extern void cancel_changes PARAMS ((int)); | |
79 | extern int constrain_operands PARAMS ((int)); | |
80 | extern int memory_address_p PARAMS ((enum machine_mode, rtx)); | |
81 | extern int strict_memory_address_p PARAMS ((enum machine_mode, rtx)); | |
82 | extern int validate_replace_rtx PARAMS ((rtx, rtx, rtx)); | |
83 | extern void validate_replace_rtx_group PARAMS ((rtx, rtx, rtx)); | |
84 | extern int validate_replace_src PARAMS ((rtx, rtx, rtx)); | |
523bb0ba | 85 | #ifdef HAVE_cc0 |
13536812 | 86 | extern int next_insn_tests_no_inequality PARAMS ((rtx)); |
523bb0ba | 87 | #endif |
13536812 | 88 | extern int reg_fits_class_p PARAMS ((rtx, enum reg_class, int, |
31031edd | 89 | enum machine_mode)); |
13536812 KG |
90 | extern rtx *find_single_use PARAMS ((rtx, rtx, rtx *)); |
91 | ||
92 | extern int general_operand PARAMS ((rtx, enum machine_mode)); | |
93 | extern int address_operand PARAMS ((rtx, enum machine_mode)); | |
94 | extern int register_operand PARAMS ((rtx, enum machine_mode)); | |
95 | extern int pmode_register_operand PARAMS ((rtx, enum machine_mode)); | |
96 | extern int scratch_operand PARAMS ((rtx, enum machine_mode)); | |
97 | extern int immediate_operand PARAMS ((rtx, enum machine_mode)); | |
98 | extern int const_int_operand PARAMS ((rtx, enum machine_mode)); | |
99 | extern int const_double_operand PARAMS ((rtx, enum machine_mode)); | |
100 | extern int nonimmediate_operand PARAMS ((rtx, enum machine_mode)); | |
101 | extern int nonmemory_operand PARAMS ((rtx, enum machine_mode)); | |
102 | extern int push_operand PARAMS ((rtx, enum machine_mode)); | |
103 | extern int pop_operand PARAMS ((rtx, enum machine_mode)); | |
104 | extern int memory_operand PARAMS ((rtx, enum machine_mode)); | |
105 | extern int indirect_operand PARAMS ((rtx, enum machine_mode)); | |
106 | extern int mode_independent_operand PARAMS ((rtx, enum machine_mode)); | |
107 | extern int comparison_operator PARAMS ((rtx, enum machine_mode)); | |
108 | ||
109 | extern int offsettable_memref_p PARAMS ((rtx)); | |
110 | extern int offsettable_nonstrict_memref_p PARAMS ((rtx)); | |
111 | extern int offsettable_address_p PARAMS ((int, enum machine_mode, rtx)); | |
112 | extern int mode_dependent_address_p PARAMS ((rtx)); | |
113 | ||
114 | extern int recog PARAMS ((rtx, rtx, int *)); | |
115 | extern void add_clobbers PARAMS ((rtx, int)); | |
116 | extern void insn_extract PARAMS ((rtx)); | |
117 | extern void extract_insn PARAMS ((rtx)); | |
118 | extern void preprocess_constraints PARAMS ((void)); | |
119 | extern rtx recog_next_insn PARAMS ((rtx, int)); | |
120 | extern void peephole2_optimize PARAMS ((FILE *)); | |
121 | extern rtx peephole2_insns PARAMS ((rtx, rtx, rtx *)); | |
64a93ac5 CH |
122 | |
123 | /* Nonzero means volatile operands are recognized. */ | |
64a93ac5 CH |
124 | extern int volatile_ok; |
125 | ||
0a578fee BS |
126 | /* Set by constrain_operands to the number of the alternative that |
127 | matched. */ | |
128 | extern int which_alternative; | |
129 | ||
64a93ac5 CH |
130 | /* The following vectors hold the results from insn_extract. */ |
131 | ||
1ccbefce RH |
132 | struct recog_data |
133 | { | |
134 | /* It is very tempting to make the 5 operand related arrays into a | |
135 | structure and index on that. However, to be source compatible | |
136 | with all of the existing md file insn constraints and output | |
137 | templates, we need `operand' as a flat array. Without that | |
138 | member, making an array for the rest seems pointless. */ | |
64a93ac5 | 139 | |
1ccbefce RH |
140 | /* Gives value of operand N. */ |
141 | rtx operand[MAX_RECOG_OPERANDS]; | |
64a93ac5 | 142 | |
1ccbefce RH |
143 | /* Gives location where operand N was found. */ |
144 | rtx *operand_loc[MAX_RECOG_OPERANDS]; | |
64a93ac5 | 145 | |
1ccbefce RH |
146 | /* Gives the constraint string for operand N. */ |
147 | const char *constraints[MAX_RECOG_OPERANDS]; | |
64a93ac5 | 148 | |
1ccbefce RH |
149 | /* Gives the mode of operand N. */ |
150 | enum machine_mode operand_mode[MAX_RECOG_OPERANDS]; | |
0a578fee | 151 | |
1ccbefce RH |
152 | /* Gives the type (in, out, inout) for operand N. */ |
153 | enum op_type operand_type[MAX_RECOG_OPERANDS]; | |
0a578fee | 154 | |
1ccbefce RH |
155 | /* Gives location where the Nth duplicate-appearance of an operand |
156 | was found. This is something that matched MATCH_DUP. */ | |
157 | rtx *dup_loc[MAX_DUP_OPERANDS]; | |
0a578fee | 158 | |
1ccbefce RH |
159 | /* Gives the operand number that was duplicated in the Nth |
160 | duplicate-appearance of an operand. */ | |
88e6fdcb | 161 | char dup_num[MAX_DUP_OPERANDS]; |
0a578fee | 162 | |
88e6fdcb RH |
163 | /* ??? Note that these are `char' instead of `unsigned char' to (try to) |
164 | avoid certain lossage from K&R C, wherein `unsigned char' default | |
165 | promotes to `unsigned int' instead of `int' as in ISO C. As of 1999, | |
166 | the most common places to bootstrap from K&R C are SunOS and HPUX, | |
167 | both of which have signed characters by default. The only other | |
168 | supported natives that have both K&R C and unsigned characters are | |
169 | ROMP and Irix 3, and neither have been seen for a while, but do | |
170 | continue to consider unsignedness when performing arithmetic inside | |
171 | a comparison. */ | |
172 | ||
1ccbefce | 173 | /* The number of operands of the insn. */ |
88e6fdcb | 174 | char n_operands; |
0a578fee | 175 | |
1ccbefce | 176 | /* The number of MATCH_DUPs in the insn. */ |
88e6fdcb | 177 | char n_dups; |
0eadeb15 | 178 | |
1ccbefce | 179 | /* The number of alternatives in the constraints for the insn. */ |
88e6fdcb | 180 | char n_alternatives; |
1ccbefce RH |
181 | }; |
182 | ||
183 | extern struct recog_data recog_data; | |
0a578fee | 184 | |
f62a15e3 BS |
185 | /* Contains a vector of operand_alternative structures for every operand. |
186 | Set up by preprocess_constraints. */ | |
b0983bb9 | 187 | extern struct operand_alternative recog_op_alt[MAX_RECOG_OPERANDS][MAX_RECOG_ALTERNATIVES]; |
f62a15e3 | 188 | |
a995e389 | 189 | /* A table defined in insn-output.c that give information about |
64a93ac5 CH |
190 | each insn-code value. */ |
191 | ||
13536812 KG |
192 | typedef int (*insn_operand_predicate_fn) PARAMS ((rtx, enum machine_mode)); |
193 | typedef const char * (*insn_output_fn) PARAMS ((rtx *, rtx)); | |
13536812 | 194 | typedef rtx (*insn_gen_fn) PARAMS ((rtx, ...)); |
64a93ac5 | 195 | |
a995e389 RH |
196 | struct insn_operand_data |
197 | { | |
198 | insn_operand_predicate_fn predicate; | |
64a93ac5 | 199 | |
a995e389 | 200 | const char *constraint; |
64a93ac5 | 201 | |
a995e389 RH |
202 | enum machine_mode mode; |
203 | ||
a995e389 | 204 | char strict_low; |
dfac187e BS |
205 | |
206 | char eliminable; | |
a995e389 | 207 | }; |
64a93ac5 | 208 | |
4bbf910e RH |
209 | /* Legal values for insn_data.output_format. Indicate what type of data |
210 | is stored in insn_data.output. */ | |
211 | #define INSN_OUTPUT_FORMAT_NONE 0 /* abort */ | |
212 | #define INSN_OUTPUT_FORMAT_SINGLE 1 /* const char * */ | |
213 | #define INSN_OUTPUT_FORMAT_MULTI 2 /* const char * const * */ | |
214 | #define INSN_OUTPUT_FORMAT_FUNCTION 3 /* const char * (*)(...) */ | |
215 | ||
a995e389 RH |
216 | struct insn_data |
217 | { | |
218 | const char *name; | |
4bbf910e | 219 | const PTR output; |
a995e389 RH |
220 | insn_gen_fn genfun; |
221 | const struct insn_operand_data *operand; | |
64a93ac5 | 222 | |
88e6fdcb RH |
223 | char n_operands; |
224 | char n_dups; | |
225 | char n_alternatives; | |
226 | char output_format; | |
a995e389 | 227 | }; |
64a93ac5 | 228 | |
a995e389 | 229 | extern const struct insn_data insn_data[]; |