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e0001a05 | 1 | /* Table of relaxations for Xtensa assembly. |
d87bef3a | 2 | Copyright (C) 2003-2023 Free Software Foundation, Inc. |
e0001a05 NC |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
e0001a05 NC |
9 | any later version. |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to | |
c138bc38 | 18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, |
4b4da160 | 19 | MA 02110-1301, USA. */ |
e0001a05 NC |
20 | |
21 | /* This file contains the code for generating runtime data structures | |
22 | for relaxation pattern matching from statically specified strings. | |
23 | Each action contains an instruction pattern to match and | |
24 | preconditions for the match as well as an expansion if the pattern | |
25 | matches. The preconditions can specify that two operands are the | |
43cd72b9 BW |
26 | same or an operand is a specific constant or register. The expansion |
27 | uses the bound variables from the pattern to specify that specific | |
c138bc38 | 28 | operands from the pattern should be used in the result. |
43cd72b9 BW |
29 | |
30 | The code determines whether the condition applies to a constant or | |
31 | a register depending on the type of the operand. You may get | |
32 | unexpected results if you don't match the rule against the operand | |
33 | type correctly. | |
e0001a05 NC |
34 | |
35 | The patterns match a language like: | |
36 | ||
43cd72b9 | 37 | INSN_PATTERN ::= INSN_TEMPL ( '|' PRECOND )* ( '?' OPTIONPRED )* |
e0001a05 NC |
38 | INSN_TEMPL ::= OPCODE ' ' [ OPERAND (',' OPERAND)* ] |
39 | OPCODE ::= id | |
40 | OPERAND ::= CONSTANT | VARIABLE | SPECIALFN '(' VARIABLE ')' | |
41 | SPECIALFN ::= 'HI24S' | 'F32MINUS' | 'LOW8' | |
43cd72b9 | 42 | | 'HI16' | 'LOW16' |
e0001a05 NC |
43 | VARIABLE ::= '%' id |
44 | PRECOND ::= OPERAND CMPOP OPERAND | |
45 | CMPOP ::= '==' | '!=' | |
43cd72b9 BW |
46 | OPTIONPRED ::= OPTIONNAME ('+' OPTIONNAME) |
47 | OPTIONNAME ::= '"' id '"' | |
e0001a05 | 48 | |
c138bc38 | 49 | The replacement language |
e0001a05 | 50 | INSN_REPL ::= INSN_LABEL_LIT ( ';' INSN_LABEL_LIT )* |
c138bc38 | 51 | INSN_LABEL_LIT ::= INSN_TEMPL |
61376837 BW |
52 | | 'LABEL' |
53 | | 'LITERAL' VARIABLE | |
e0001a05 NC |
54 | |
55 | The operands in a PRECOND must be constants or variables bound by | |
56 | the INSN_PATTERN. | |
57 | ||
43cd72b9 BW |
58 | The configuration options define a predicate on the availability of |
59 | options which must be TRUE for this rule to be valid. Examples are | |
60 | requiring "density" for replacements with density instructions, | |
61 | requiring "const16" for replacements that require const16 | |
62 | instructions, etc. The names are interpreted by the assembler to a | |
63 | truth value for a particular frag. | |
64 | ||
e0001a05 NC |
65 | The operands in the INSN_REPL must be constants, variables bound in |
66 | the associated INSN_PATTERN, special variables that are bound in | |
67 | the INSN_REPL by LABEL or LITERAL definitions, or special value | |
68 | manipulation functions. | |
69 | ||
70 | A simple example of a replacement pattern: | |
71 | {"movi.n %as,%imm", "movi %as,%imm"} would convert the narrow | |
72 | movi.n instruction to the wide movi instruction. | |
73 | ||
74 | A more complex example of a branch around: | |
61376837 | 75 | {"beqz %as,%label", "bnez %as,%LABEL;j %label;LABEL"} |
e0001a05 NC |
76 | would convert a branch to a negated branch to the following instruction |
77 | with a jump to the original label. | |
c138bc38 | 78 | |
e0001a05 | 79 | An Xtensa-specific example that generates a literal: |
61376837 | 80 | {"movi %at,%imm", "LITERAL %imm; l32r %at,%LITERAL"} |
e0001a05 NC |
81 | will convert a movi instruction to an l32r of a literal |
82 | literal defined in the literal pool. | |
83 | ||
84 | Even more complex is a conversion of a load with immediate offset | |
85 | to a load of a freshly generated literal, an explicit add and | |
86 | a load with 0 offset. This transformation is only valid, though | |
87 | when the first and second operands are not the same as specified | |
88 | by the "| %at!=%as" precondition clause. | |
89 | {"l32i %at,%as,%imm | %at!=%as", | |
403b0b61 | 90 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l32i %at,%at,0"} */ |
e0001a05 NC |
91 | |
92 | #include "as.h" | |
93 | #include "xtensa-isa.h" | |
94 | #include "xtensa-relax.h" | |
95 | #include <stddef.h> | |
d0a2cfbd | 96 | #include "xtensa-dynconfig.h" |
395fa56f | 97 | |
e0001a05 NC |
98 | /* Imported from bfd. */ |
99 | extern xtensa_isa xtensa_default_isa; | |
100 | ||
e0001a05 NC |
101 | /* The opname_list is a small list of names that we use for opcode and |
102 | operand variable names to simplify ownership of these commonly used | |
103 | strings. Strings entered in the table can be compared by pointer | |
104 | equality. */ | |
105 | ||
106 | typedef struct opname_list_struct opname_list; | |
107 | typedef opname_list opname_e; | |
108 | ||
109 | struct opname_list_struct | |
110 | { | |
111 | char *opname; | |
112 | opname_list *next; | |
113 | }; | |
114 | ||
115 | static opname_list *local_opnames = NULL; | |
116 | ||
117 | ||
118 | /* The "opname_map" and its element structure "opname_map_e" are used | |
119 | for binding an operand number to a name or a constant. */ | |
120 | ||
121 | typedef struct opname_map_e_struct opname_map_e; | |
122 | typedef struct opname_map_struct opname_map; | |
123 | ||
124 | struct opname_map_e_struct | |
125 | { | |
126 | const char *operand_name; /* If null, then use constant_value. */ | |
43cd72b9 | 127 | int operand_num; |
e0001a05 NC |
128 | unsigned constant_value; |
129 | opname_map_e *next; | |
130 | }; | |
131 | ||
132 | struct opname_map_struct | |
133 | { | |
134 | opname_map_e *head; | |
135 | opname_map_e **tail; | |
136 | }; | |
137 | ||
138 | /* The "precond_list" and its element structure "precond_e" represents | |
139 | explicit preconditions comparing operand variables and constants. | |
140 | In the "precond_e" structure, a variable is identified by the name | |
141 | in the "opname" field. If that field is NULL, then the operand | |
142 | is the constant in field "opval". */ | |
143 | ||
144 | typedef struct precond_e_struct precond_e; | |
145 | typedef struct precond_list_struct precond_list; | |
146 | ||
147 | struct precond_e_struct | |
148 | { | |
149 | const char *opname1; | |
150 | unsigned opval1; | |
151 | CmpOp cmpop; | |
152 | const char *opname2; | |
153 | unsigned opval2; | |
154 | precond_e *next; | |
155 | }; | |
156 | ||
157 | struct precond_list_struct | |
158 | { | |
159 | precond_e *head; | |
160 | precond_e **tail; | |
161 | }; | |
162 | ||
163 | ||
164 | /* The insn_templ represents the INSN_TEMPL instruction template. It | |
165 | is an opcode name with a list of operands. These are used for | |
166 | instruction patterns and replacement patterns. */ | |
167 | ||
168 | typedef struct insn_templ_struct insn_templ; | |
169 | struct insn_templ_struct | |
170 | { | |
171 | const char *opcode_name; | |
172 | opname_map operand_map; | |
173 | }; | |
174 | ||
175 | ||
176 | /* The insn_pattern represents an INSN_PATTERN instruction pattern. | |
177 | It is an instruction template with preconditions that specify when | |
178 | it actually matches a given instruction. */ | |
179 | ||
180 | typedef struct insn_pattern_struct insn_pattern; | |
181 | struct insn_pattern_struct | |
182 | { | |
183 | insn_templ t; | |
184 | precond_list preconds; | |
43cd72b9 | 185 | ReqOptionList *options; |
e0001a05 NC |
186 | }; |
187 | ||
188 | ||
189 | /* The "insn_repl" and associated element structure "insn_repl_e" | |
190 | instruction replacement list is a list of | |
191 | instructions/LITERALS/LABELS with constant operands or operands | |
192 | with names bound to the operand names in the associated pattern. */ | |
193 | ||
194 | typedef struct insn_repl_e_struct insn_repl_e; | |
195 | struct insn_repl_e_struct | |
196 | { | |
197 | insn_templ t; | |
198 | insn_repl_e *next; | |
199 | }; | |
200 | ||
201 | typedef struct insn_repl_struct insn_repl; | |
202 | struct insn_repl_struct | |
203 | { | |
204 | insn_repl_e *head; | |
205 | insn_repl_e **tail; | |
206 | }; | |
207 | ||
208 | ||
209 | /* The split_rec is a vector of allocated char * pointers. */ | |
210 | ||
211 | typedef struct split_rec_struct split_rec; | |
212 | struct split_rec_struct | |
213 | { | |
214 | char **vec; | |
43cd72b9 | 215 | int count; |
e0001a05 NC |
216 | }; |
217 | ||
218 | /* The "string_pattern_pair" is a set of pairs containing instruction | |
219 | patterns and replacement strings. */ | |
220 | ||
221 | typedef struct string_pattern_pair_struct string_pattern_pair; | |
222 | struct string_pattern_pair_struct | |
223 | { | |
224 | const char *pattern; | |
225 | const char *replacement; | |
226 | }; | |
227 | ||
228 | \f | |
229 | /* The widen_spec_list is a list of valid substitutions that generate | |
230 | wider representations. These are generally used to specify | |
231 | replacements for instructions whose immediates do not fit their | |
33b7f697 | 232 | encodings. A valid transition may require multiple steps of |
e0001a05 NC |
233 | one-to-one instruction replacements with a final multiple |
234 | instruction replacement. As an example, here are the transitions | |
235 | required to replace an 'addi.n' with an 'addi', 'addmi'. | |
236 | ||
237 | addi.n a4, 0x1010 | |
238 | => addi a4, 0x1010 | |
239 | => addmi a4, 0x1010 | |
3739860c | 240 | => addmi a4, 0x1000, addi a4, 0x10. |
b81bf389 BW |
241 | |
242 | See the comments in xg_assembly_relax for some important details | |
243 | regarding how these chains must be built. */ | |
e0001a05 NC |
244 | |
245 | static string_pattern_pair widen_spec_list[] = | |
246 | { | |
43cd72b9 BW |
247 | {"add.n %ar,%as,%at ? IsaUseDensityInstruction", "add %ar,%as,%at"}, |
248 | {"addi.n %ar,%as,%imm ? IsaUseDensityInstruction", "addi %ar,%as,%imm"}, | |
249 | {"beqz.n %as,%label ? IsaUseDensityInstruction", "beqz %as,%label"}, | |
250 | {"bnez.n %as,%label ? IsaUseDensityInstruction", "bnez %as,%label"}, | |
251 | {"l32i.n %at,%as,%imm ? IsaUseDensityInstruction", "l32i %at,%as,%imm"}, | |
252 | {"mov.n %at,%as ? IsaUseDensityInstruction", "or %at,%as,%as"}, | |
253 | {"movi.n %as,%imm ? IsaUseDensityInstruction", "movi %as,%imm"}, | |
254 | {"nop.n ? IsaUseDensityInstruction ? realnop", "nop"}, | |
255 | {"nop.n ? IsaUseDensityInstruction ? no-realnop", "or 1,1,1"}, | |
256 | {"ret.n %as ? IsaUseDensityInstruction", "ret %as"}, | |
257 | {"retw.n %as ? IsaUseDensityInstruction", "retw %as"}, | |
258 | {"s32i.n %at,%as,%imm ? IsaUseDensityInstruction", "s32i %at,%as,%imm"}, | |
e0001a05 NC |
259 | {"srli %at,%as,%imm", "extui %at,%as,%imm,F32MINUS(%imm)"}, |
260 | {"slli %ar,%as,0", "or %ar,%as,%as"}, | |
43cd72b9 BW |
261 | |
262 | /* Widening with literals or const16. */ | |
c138bc38 | 263 | {"movi %at,%imm ? IsaUseL32R ", |
61376837 | 264 | "LITERAL %imm; l32r %at,%LITERAL"}, |
c138bc38 | 265 | {"movi %at,%imm ? IsaUseConst16", |
43cd72b9 BW |
266 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm)"}, |
267 | ||
e0001a05 NC |
268 | {"addi %ar,%as,%imm", "addmi %ar,%as,%imm"}, |
269 | /* LOW8 is the low 8 bits of the Immed | |
270 | MID8S is the middle 8 bits of the Immed */ | |
271 | {"addmi %ar,%as,%imm", "addmi %ar,%as,HI24S(%imm); addi %ar,%ar,LOW8(%imm)"}, | |
43cd72b9 BW |
272 | |
273 | /* In the end convert to either an l32r or const16. */ | |
274 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseL32R", | |
61376837 | 275 | "LITERAL %imm; l32r %ar,%LITERAL; add %ar,%as,%ar"}, |
43cd72b9 BW |
276 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseConst16", |
277 | "const16 %ar,HI16U(%imm); const16 %ar,LOW16U(%imm); add %ar,%as,%ar"}, | |
e0001a05 NC |
278 | |
279 | /* Widening the load instructions with too-large immediates */ | |
43cd72b9 | 280 | {"l8ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
61376837 | 281 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l8ui %at,%at,0"}, |
43cd72b9 | 282 | {"l16si %at,%as,%imm | %at!=%as ? IsaUseL32R", |
61376837 | 283 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l16si %at,%at,0"}, |
43cd72b9 | 284 | {"l16ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
61376837 | 285 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l16ui %at,%at,0"}, |
43cd72b9 | 286 | {"l32i %at,%as,%imm | %at!=%as ? IsaUseL32R", |
61376837 | 287 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l32i %at,%at,0"}, |
43cd72b9 BW |
288 | |
289 | /* Widening load instructions with const16s. */ | |
290 | {"l8ui %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
291 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l8ui %at,%at,0"}, | |
292 | {"l16si %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
293 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16si %at,%at,0"}, | |
294 | {"l16ui %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
295 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16ui %at,%at,0"}, | |
296 | {"l32i %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
297 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l32i %at,%at,0"}, | |
298 | ||
403b0b61 MF |
299 | /* Widening loops with literals. */ |
300 | {"loop %as,%label | %as!=1 ? IsaUseLoops ? IsaUseL32R", | |
301 | "loop %as,%LABEL;" | |
302 | "rsr.lend %as;" /* LEND */ | |
303 | "wsr.lbeg %as;" /* LBEG */ | |
304 | "LITERAL %label;" | |
305 | "l32r %as, %LITERAL;" | |
306 | "nop;" | |
307 | "wsr.lend %as;" | |
308 | "isync;" | |
309 | "rsr.lcount %as;" /* LCOUNT */ | |
310 | "addi %as, %as, 1;" | |
311 | "LABEL"}, | |
312 | {"loopgtz %as,%label | %as!=1 ? IsaUseLoops ? IsaUseL32R", | |
313 | "beqz %as,%label;" | |
314 | "bltz %as,%label;" | |
315 | "loopgtz %as,%LABEL;" | |
316 | "rsr.lend %as;" /* LEND */ | |
317 | "wsr.lbeg %as;" /* LBEG */ | |
318 | "LITERAL %label;" | |
319 | "l32r %as, %LITERAL;" | |
320 | "nop;" | |
321 | "wsr.lend %as;" | |
322 | "isync;" | |
323 | "rsr.lcount %as;" /* LCOUNT */ | |
324 | "addi %as, %as, 1;" | |
325 | "LABEL"}, | |
326 | {"loopnez %as,%label | %as!=1 ? IsaUseLoops ? IsaUseL32R", | |
327 | "beqz %as,%label;" | |
328 | "loopnez %as,%LABEL;" | |
329 | "rsr.lend %as;" /* LEND */ | |
330 | "wsr.lbeg %as;" /* LBEG */ | |
331 | "LITERAL %label;" | |
332 | "l32r %as, %LITERAL;" | |
333 | "nop;" | |
334 | "wsr.lend %as;" | |
335 | "isync;" | |
336 | "rsr.lcount %as;" /* LCOUNT */ | |
337 | "addi %as, %as, 1;" | |
338 | "LABEL"}, | |
339 | ||
340 | /* Widening loops with const16. */ | |
341 | {"loop %as,%label | %as!=1 ? IsaUseLoops ? IsaUseConst16", | |
61376837 | 342 | "loop %as,%LABEL;" |
43cd72b9 BW |
343 | "rsr.lend %as;" /* LEND */ |
344 | "wsr.lbeg %as;" /* LBEG */ | |
403b0b61 MF |
345 | "const16 %as,HI16U(%label);" |
346 | "const16 %as,LOW16U(%label);" | |
43cd72b9 | 347 | "wsr.lend %as;" |
e0001a05 | 348 | "isync;" |
43cd72b9 | 349 | "rsr.lcount %as;" /* LCOUNT */ |
403b0b61 | 350 | "addi %as, %as, 1;" |
61376837 | 351 | "LABEL"}, |
403b0b61 | 352 | {"loopgtz %as,%label | %as!=1 ? IsaUseLoops ? IsaUseConst16", |
43cd72b9 BW |
353 | "beqz %as,%label;" |
354 | "bltz %as,%label;" | |
61376837 | 355 | "loopgtz %as,%LABEL;" |
43cd72b9 BW |
356 | "rsr.lend %as;" /* LEND */ |
357 | "wsr.lbeg %as;" /* LBEG */ | |
403b0b61 MF |
358 | "const16 %as,HI16U(%label);" |
359 | "const16 %as,LOW16U(%label);" | |
43cd72b9 | 360 | "wsr.lend %as;" |
e0001a05 | 361 | "isync;" |
43cd72b9 | 362 | "rsr.lcount %as;" /* LCOUNT */ |
403b0b61 | 363 | "addi %as, %as, 1;" |
61376837 | 364 | "LABEL"}, |
403b0b61 | 365 | {"loopnez %as,%label | %as!=1 ? IsaUseLoops ? IsaUseConst16", |
e0001a05 | 366 | "beqz %as,%label;" |
61376837 | 367 | "loopnez %as,%LABEL;" |
43cd72b9 BW |
368 | "rsr.lend %as;" /* LEND */ |
369 | "wsr.lbeg %as;" /* LBEG */ | |
403b0b61 MF |
370 | "const16 %as,HI16U(%label);" |
371 | "const16 %as,LOW16U(%label);" | |
43cd72b9 | 372 | "wsr.lend %as;" |
e0001a05 | 373 | "isync;" |
43cd72b9 | 374 | "rsr.lcount %as;" /* LCOUNT */ |
403b0b61 | 375 | "addi %as, %as, 1;" |
61376837 | 376 | "LABEL"}, |
e0001a05 | 377 | |
b2d179be BW |
378 | /* Relaxing to wide branches. Order is important here. With wide |
379 | branches, there is more than one correct relaxation for an | |
380 | out-of-range branch. Put the wide branch relaxations first in the | |
381 | table since they are more efficient than the branch-around | |
382 | relaxations. */ | |
3739860c | 383 | |
1946c96e BW |
384 | {"beqz %as,%label ? IsaUseWideBranches", "WIDE.beqz %as,%label"}, |
385 | {"bnez %as,%label ? IsaUseWideBranches", "WIDE.bnez %as,%label"}, | |
386 | {"bgez %as,%label ? IsaUseWideBranches", "WIDE.bgez %as,%label"}, | |
387 | {"bltz %as,%label ? IsaUseWideBranches", "WIDE.bltz %as,%label"}, | |
388 | {"beqi %as,%imm,%label ? IsaUseWideBranches", "WIDE.beqi %as,%imm,%label"}, | |
389 | {"bnei %as,%imm,%label ? IsaUseWideBranches", "WIDE.bnei %as,%imm,%label"}, | |
390 | {"bgei %as,%imm,%label ? IsaUseWideBranches", "WIDE.bgei %as,%imm,%label"}, | |
391 | {"blti %as,%imm,%label ? IsaUseWideBranches", "WIDE.blti %as,%imm,%label"}, | |
392 | {"bgeui %as,%imm,%label ? IsaUseWideBranches", "WIDE.bgeui %as,%imm,%label"}, | |
393 | {"bltui %as,%imm,%label ? IsaUseWideBranches", "WIDE.bltui %as,%imm,%label"}, | |
394 | {"bbci %as,%imm,%label ? IsaUseWideBranches", "WIDE.bbci %as,%imm,%label"}, | |
395 | {"bbsi %as,%imm,%label ? IsaUseWideBranches", "WIDE.bbsi %as,%imm,%label"}, | |
396 | {"beq %as,%at,%label ? IsaUseWideBranches", "WIDE.beq %as,%at,%label"}, | |
397 | {"bne %as,%at,%label ? IsaUseWideBranches", "WIDE.bne %as,%at,%label"}, | |
398 | {"bge %as,%at,%label ? IsaUseWideBranches", "WIDE.bge %as,%at,%label"}, | |
399 | {"blt %as,%at,%label ? IsaUseWideBranches", "WIDE.blt %as,%at,%label"}, | |
400 | {"bgeu %as,%at,%label ? IsaUseWideBranches", "WIDE.bgeu %as,%at,%label"}, | |
401 | {"bltu %as,%at,%label ? IsaUseWideBranches", "WIDE.bltu %as,%at,%label"}, | |
402 | {"bany %as,%at,%label ? IsaUseWideBranches", "WIDE.bany %as,%at,%label"}, | |
403 | {"bnone %as,%at,%label ? IsaUseWideBranches", "WIDE.bnone %as,%at,%label"}, | |
404 | {"ball %as,%at,%label ? IsaUseWideBranches", "WIDE.ball %as,%at,%label"}, | |
405 | {"bnall %as,%at,%label ? IsaUseWideBranches", "WIDE.bnall %as,%at,%label"}, | |
406 | {"bbc %as,%at,%label ? IsaUseWideBranches", "WIDE.bbc %as,%at,%label"}, | |
407 | {"bbs %as,%at,%label ? IsaUseWideBranches", "WIDE.bbs %as,%at,%label"}, | |
3739860c | 408 | |
b2d179be BW |
409 | /* Widening branch comparisons eq/ne to zero. Prefer relaxing to narrow |
410 | branches if the density option is available. */ | |
61376837 BW |
411 | {"beqz %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%LABEL;j %label;LABEL"}, |
412 | {"bnez %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%LABEL;j %label;LABEL"}, | |
413 | {"beqz %as,%label", "bnez %as,%LABEL;j %label;LABEL"}, | |
414 | {"bnez %as,%label", "beqz %as,%LABEL;j %label;LABEL"}, | |
b81bf389 BW |
415 | {"WIDE.beqz %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%LABEL;j %label;LABEL"}, |
416 | {"WIDE.bnez %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%LABEL;j %label;LABEL"}, | |
417 | {"WIDE.beqz %as,%label", "bnez %as,%LABEL;j %label;LABEL"}, | |
418 | {"WIDE.bnez %as,%label", "beqz %as,%LABEL;j %label;LABEL"}, | |
b2d179be BW |
419 | |
420 | /* Widening expect-taken branches. */ | |
61376837 BW |
421 | {"beqzt %as,%label ? IsaUsePredictedBranches", "bnez %as,%LABEL;j %label;LABEL"}, |
422 | {"bnezt %as,%label ? IsaUsePredictedBranches", "beqz %as,%LABEL;j %label;LABEL"}, | |
423 | {"beqt %as,%at,%label ? IsaUsePredictedBranches", "bne %as,%at,%LABEL;j %label;LABEL"}, | |
424 | {"bnet %as,%at,%label ? IsaUsePredictedBranches", "beq %as,%at,%LABEL;j %label;LABEL"}, | |
b2d179be BW |
425 | |
426 | /* Widening branches from the Xtensa boolean option. */ | |
61376837 BW |
427 | {"bt %bs,%label ? IsaUseBooleans", "bf %bs,%LABEL;j %label;LABEL"}, |
428 | {"bf %bs,%label ? IsaUseBooleans", "bt %bs,%LABEL;j %label;LABEL"}, | |
e0001a05 | 429 | |
b2d179be | 430 | /* Other branch-around-jump widenings. */ |
61376837 BW |
431 | {"bgez %as,%label", "bltz %as,%LABEL;j %label;LABEL"}, |
432 | {"bltz %as,%label", "bgez %as,%LABEL;j %label;LABEL"}, | |
433 | {"beqi %as,%imm,%label", "bnei %as,%imm,%LABEL;j %label;LABEL"}, | |
434 | {"bnei %as,%imm,%label", "beqi %as,%imm,%LABEL;j %label;LABEL"}, | |
435 | {"bgei %as,%imm,%label", "blti %as,%imm,%LABEL;j %label;LABEL"}, | |
436 | {"blti %as,%imm,%label", "bgei %as,%imm,%LABEL;j %label;LABEL"}, | |
437 | {"bgeui %as,%imm,%label", "bltui %as,%imm,%LABEL;j %label;LABEL"}, | |
438 | {"bltui %as,%imm,%label", "bgeui %as,%imm,%LABEL;j %label;LABEL"}, | |
439 | {"bbci %as,%imm,%label", "bbsi %as,%imm,%LABEL;j %label;LABEL"}, | |
440 | {"bbsi %as,%imm,%label", "bbci %as,%imm,%LABEL;j %label;LABEL"}, | |
441 | {"beq %as,%at,%label", "bne %as,%at,%LABEL;j %label;LABEL"}, | |
442 | {"bne %as,%at,%label", "beq %as,%at,%LABEL;j %label;LABEL"}, | |
443 | {"bge %as,%at,%label", "blt %as,%at,%LABEL;j %label;LABEL"}, | |
444 | {"blt %as,%at,%label", "bge %as,%at,%LABEL;j %label;LABEL"}, | |
445 | {"bgeu %as,%at,%label", "bltu %as,%at,%LABEL;j %label;LABEL"}, | |
446 | {"bltu %as,%at,%label", "bgeu %as,%at,%LABEL;j %label;LABEL"}, | |
447 | {"bany %as,%at,%label", "bnone %as,%at,%LABEL;j %label;LABEL"}, | |
448 | {"bnone %as,%at,%label", "bany %as,%at,%LABEL;j %label;LABEL"}, | |
449 | {"ball %as,%at,%label", "bnall %as,%at,%LABEL;j %label;LABEL"}, | |
450 | {"bnall %as,%at,%label", "ball %as,%at,%LABEL;j %label;LABEL"}, | |
451 | {"bbc %as,%at,%label", "bbs %as,%at,%LABEL;j %label;LABEL"}, | |
452 | {"bbs %as,%at,%label", "bbc %as,%at,%LABEL;j %label;LABEL"}, | |
43cd72b9 | 453 | |
b81bf389 BW |
454 | {"WIDE.bgez %as,%label", "bltz %as,%LABEL;j %label;LABEL"}, |
455 | {"WIDE.bltz %as,%label", "bgez %as,%LABEL;j %label;LABEL"}, | |
456 | {"WIDE.beqi %as,%imm,%label", "bnei %as,%imm,%LABEL;j %label;LABEL"}, | |
457 | {"WIDE.bnei %as,%imm,%label", "beqi %as,%imm,%LABEL;j %label;LABEL"}, | |
458 | {"WIDE.bgei %as,%imm,%label", "blti %as,%imm,%LABEL;j %label;LABEL"}, | |
459 | {"WIDE.blti %as,%imm,%label", "bgei %as,%imm,%LABEL;j %label;LABEL"}, | |
460 | {"WIDE.bgeui %as,%imm,%label", "bltui %as,%imm,%LABEL;j %label;LABEL"}, | |
461 | {"WIDE.bltui %as,%imm,%label", "bgeui %as,%imm,%LABEL;j %label;LABEL"}, | |
462 | {"WIDE.bbci %as,%imm,%label", "bbsi %as,%imm,%LABEL;j %label;LABEL"}, | |
463 | {"WIDE.bbsi %as,%imm,%label", "bbci %as,%imm,%LABEL;j %label;LABEL"}, | |
464 | {"WIDE.beq %as,%at,%label", "bne %as,%at,%LABEL;j %label;LABEL"}, | |
465 | {"WIDE.bne %as,%at,%label", "beq %as,%at,%LABEL;j %label;LABEL"}, | |
466 | {"WIDE.bge %as,%at,%label", "blt %as,%at,%LABEL;j %label;LABEL"}, | |
467 | {"WIDE.blt %as,%at,%label", "bge %as,%at,%LABEL;j %label;LABEL"}, | |
468 | {"WIDE.bgeu %as,%at,%label", "bltu %as,%at,%LABEL;j %label;LABEL"}, | |
469 | {"WIDE.bltu %as,%at,%label", "bgeu %as,%at,%LABEL;j %label;LABEL"}, | |
470 | {"WIDE.bany %as,%at,%label", "bnone %as,%at,%LABEL;j %label;LABEL"}, | |
471 | {"WIDE.bnone %as,%at,%label", "bany %as,%at,%LABEL;j %label;LABEL"}, | |
472 | {"WIDE.ball %as,%at,%label", "bnall %as,%at,%LABEL;j %label;LABEL"}, | |
473 | {"WIDE.bnall %as,%at,%label", "ball %as,%at,%LABEL;j %label;LABEL"}, | |
474 | {"WIDE.bbc %as,%at,%label", "bbs %as,%at,%LABEL;j %label;LABEL"}, | |
475 | {"WIDE.bbs %as,%at,%label", "bbc %as,%at,%LABEL;j %label;LABEL"}, | |
476 | ||
43cd72b9 BW |
477 | /* Expanding calls with literals. */ |
478 | {"call0 %label,%ar0 ? IsaUseL32R", | |
61376837 | 479 | "LITERAL %label; l32r a0,%LITERAL; callx0 a0,%ar0"}, |
43cd72b9 | 480 | {"call4 %label,%ar4 ? IsaUseL32R", |
61376837 | 481 | "LITERAL %label; l32r a4,%LITERAL; callx4 a4,%ar4"}, |
43cd72b9 | 482 | {"call8 %label,%ar8 ? IsaUseL32R", |
61376837 | 483 | "LITERAL %label; l32r a8,%LITERAL; callx8 a8,%ar8"}, |
43cd72b9 | 484 | {"call12 %label,%ar12 ? IsaUseL32R", |
61376837 | 485 | "LITERAL %label; l32r a12,%LITERAL; callx12 a12,%ar12"}, |
43cd72b9 BW |
486 | |
487 | /* Expanding calls with const16. */ | |
488 | {"call0 %label,%ar0 ? IsaUseConst16", | |
489 | "const16 a0,HI16U(%label); const16 a0,LOW16U(%label); callx0 a0,%ar0"}, | |
490 | {"call4 %label,%ar4 ? IsaUseConst16", | |
491 | "const16 a4,HI16U(%label); const16 a4,LOW16U(%label); callx4 a4,%ar4"}, | |
492 | {"call8 %label,%ar8 ? IsaUseConst16", | |
493 | "const16 a8,HI16U(%label); const16 a8,LOW16U(%label); callx8 a8,%ar8"}, | |
494 | {"call12 %label,%ar12 ? IsaUseConst16", | |
19e8f41a BW |
495 | "const16 a12,HI16U(%label); const16 a12,LOW16U(%label); callx12 a12,%ar12"}, |
496 | ||
497 | /* Expanding j.l with literals. */ | |
498 | {"j %label ? FREEREG ? IsaUseL32R", | |
499 | "LITERAL %label; l32r FREEREG,%LITERAL; jx FREEREG"}, | |
500 | /* Expanding j.l with const16. */ | |
501 | {"j %label ? FREEREG ? IsaUseConst16", | |
502 | "const16 FREEREG,HI16U(%label); const16 FREEREG,LOW16U(%label); jx FREEREG"}, | |
e0001a05 NC |
503 | }; |
504 | ||
505 | #define WIDEN_COUNT (sizeof (widen_spec_list) / sizeof (string_pattern_pair)) | |
506 | ||
507 | ||
508 | /* The simplify_spec_list specifies simplifying transformations that | |
509 | will reduce the instruction width or otherwise simplify an | |
510 | instruction. These are usually applied before relaxation in the | |
511 | assembler. It is always legal to simplify. Even for "addi as, 0", | |
512 | the "addi.n as, 0" will eventually be widened back to an "addi 0" | |
513 | after the widening table is applied. Note: The usage of this table | |
514 | has changed somewhat so that it is entirely specific to "narrowing" | |
515 | instructions to use the density option. This table is not used at | |
516 | all when the density option is not available. */ | |
517 | ||
518 | string_pattern_pair simplify_spec_list[] = | |
519 | { | |
43cd72b9 BW |
520 | {"add %ar,%as,%at ? IsaUseDensityInstruction", "add.n %ar,%as,%at"}, |
521 | {"addi.n %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, | |
522 | {"addi %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, | |
523 | {"addi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, | |
524 | {"addmi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, | |
525 | {"beqz %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%label"}, | |
526 | {"bnez %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%label"}, | |
527 | {"l32i %at,%as,%imm ? IsaUseDensityInstruction", "l32i.n %at,%as,%imm"}, | |
528 | {"movi %as,%imm ? IsaUseDensityInstruction", "movi.n %as,%imm"}, | |
529 | {"nop ? realnop ? IsaUseDensityInstruction", "nop.n"}, | |
530 | {"or %ar,%as,%at | %ar==%as | %as==%at ? IsaUseDensityInstruction", "nop.n"}, | |
531 | {"or %ar,%as,%at | %ar!=%as | %as==%at ? IsaUseDensityInstruction", "mov.n %ar,%as"}, | |
532 | {"ret %as ? IsaUseDensityInstruction", "ret.n %as"}, | |
533 | {"retw %as ? IsaUseDensityInstruction", "retw.n %as"}, | |
534 | {"s32i %at,%as,%imm ? IsaUseDensityInstruction", "s32i.n %at,%as,%imm"}, | |
535 | {"slli %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"} | |
e0001a05 NC |
536 | }; |
537 | ||
538 | #define SIMPLIFY_COUNT \ | |
539 | (sizeof (simplify_spec_list) / sizeof (string_pattern_pair)) | |
540 | ||
541 | \f | |
e0001a05 NC |
542 | /* Externally visible functions. */ |
543 | ||
5b7c81bd | 544 | extern bool xg_has_userdef_op_fn (OpType); |
7fa3d080 | 545 | extern long xg_apply_userdef_op_fn (OpType, long); |
e0001a05 | 546 | |
7fa3d080 BW |
547 | |
548 | static void | |
549 | append_transition (TransitionTable *tt, | |
550 | xtensa_opcode opcode, | |
551 | TransitionRule *t, | |
552 | transition_cmp_fn cmp) | |
e0001a05 | 553 | { |
add39d23 | 554 | TransitionList *tl = XNEW (TransitionList); |
e0001a05 | 555 | TransitionList *prev; |
43cd72b9 | 556 | TransitionList **t_p; |
9c2799c2 NC |
557 | gas_assert (tt != NULL); |
558 | gas_assert (opcode < tt->num_opcodes); | |
e0001a05 NC |
559 | |
560 | prev = tt->table[opcode]; | |
561 | tl->rule = t; | |
562 | tl->next = NULL; | |
563 | if (prev == NULL) | |
564 | { | |
565 | tt->table[opcode] = tl; | |
566 | return; | |
567 | } | |
43cd72b9 BW |
568 | |
569 | for (t_p = &tt->table[opcode]; (*t_p) != NULL; t_p = &(*t_p)->next) | |
e0001a05 | 570 | { |
43cd72b9 BW |
571 | if (cmp && cmp (t, (*t_p)->rule) < 0) |
572 | { | |
573 | /* Insert it here. */ | |
574 | tl->next = *t_p; | |
575 | *t_p = tl; | |
576 | return; | |
577 | } | |
e0001a05 | 578 | } |
43cd72b9 | 579 | (*t_p) = tl; |
e0001a05 NC |
580 | } |
581 | ||
582 | ||
7fa3d080 BW |
583 | static void |
584 | append_condition (TransitionRule *tr, Precondition *cond) | |
e0001a05 | 585 | { |
add39d23 | 586 | PreconditionList *pl = XNEW (PreconditionList); |
e0001a05 NC |
587 | PreconditionList *prev = tr->conditions; |
588 | PreconditionList *nxt; | |
589 | ||
590 | pl->precond = cond; | |
591 | pl->next = NULL; | |
592 | if (prev == NULL) | |
593 | { | |
594 | tr->conditions = pl; | |
595 | return; | |
596 | } | |
597 | nxt = prev->next; | |
598 | while (nxt != NULL) | |
599 | { | |
600 | prev = nxt; | |
601 | nxt = nxt->next; | |
602 | } | |
603 | prev->next = pl; | |
604 | } | |
605 | ||
606 | ||
7fa3d080 BW |
607 | static void |
608 | append_value_condition (TransitionRule *tr, | |
609 | CmpOp cmp, | |
610 | unsigned op1, | |
611 | unsigned op2) | |
e0001a05 | 612 | { |
add39d23 | 613 | Precondition *cond = XNEW (Precondition); |
e0001a05 NC |
614 | |
615 | cond->cmp = cmp; | |
616 | cond->op_num = op1; | |
617 | cond->typ = OP_OPERAND; | |
618 | cond->op_data = op2; | |
619 | append_condition (tr, cond); | |
620 | } | |
621 | ||
622 | ||
7fa3d080 BW |
623 | static void |
624 | append_constant_value_condition (TransitionRule *tr, | |
625 | CmpOp cmp, | |
626 | unsigned op1, | |
627 | unsigned cnst) | |
e0001a05 | 628 | { |
add39d23 | 629 | Precondition *cond = XNEW (Precondition); |
e0001a05 NC |
630 | |
631 | cond->cmp = cmp; | |
632 | cond->op_num = op1; | |
633 | cond->typ = OP_CONSTANT; | |
634 | cond->op_data = cnst; | |
635 | append_condition (tr, cond); | |
636 | } | |
637 | ||
638 | ||
7fa3d080 BW |
639 | static void |
640 | append_build_insn (TransitionRule *tr, BuildInstr *bi) | |
e0001a05 NC |
641 | { |
642 | BuildInstr *prev = tr->to_instr; | |
643 | BuildInstr *nxt; | |
644 | ||
645 | bi->next = NULL; | |
646 | if (prev == NULL) | |
647 | { | |
648 | tr->to_instr = bi; | |
649 | return; | |
650 | } | |
651 | nxt = prev->next; | |
652 | while (nxt != 0) | |
653 | { | |
654 | prev = nxt; | |
655 | nxt = prev->next; | |
656 | } | |
657 | prev->next = bi; | |
658 | } | |
659 | ||
660 | ||
7fa3d080 BW |
661 | static void |
662 | append_op (BuildInstr *bi, BuildOp *b_op) | |
e0001a05 NC |
663 | { |
664 | BuildOp *prev = bi->ops; | |
665 | BuildOp *nxt; | |
666 | ||
667 | if (prev == NULL) | |
668 | { | |
669 | bi->ops = b_op; | |
670 | return; | |
671 | } | |
672 | nxt = prev->next; | |
673 | while (nxt != NULL) | |
674 | { | |
675 | prev = nxt; | |
676 | nxt = nxt->next; | |
677 | } | |
678 | prev->next = b_op; | |
679 | } | |
680 | ||
681 | ||
7fa3d080 | 682 | static void |
28dbbc02 | 683 | append_literal_op (BuildInstr *bi, unsigned op1, unsigned src_op) |
e0001a05 | 684 | { |
add39d23 | 685 | BuildOp *b_op = XNEW (BuildOp); |
e0001a05 NC |
686 | |
687 | b_op->op_num = op1; | |
688 | b_op->typ = OP_LITERAL; | |
28dbbc02 | 689 | b_op->op_data = src_op; |
e0001a05 NC |
690 | b_op->next = NULL; |
691 | append_op (bi, b_op); | |
692 | } | |
693 | ||
694 | ||
7fa3d080 | 695 | static void |
61376837 | 696 | append_label_op (BuildInstr *bi, unsigned op1) |
e0001a05 | 697 | { |
add39d23 | 698 | BuildOp *b_op = XNEW (BuildOp); |
e0001a05 NC |
699 | |
700 | b_op->op_num = op1; | |
701 | b_op->typ = OP_LABEL; | |
61376837 | 702 | b_op->op_data = 0; |
e0001a05 NC |
703 | b_op->next = NULL; |
704 | append_op (bi, b_op); | |
705 | } | |
706 | ||
707 | ||
7fa3d080 BW |
708 | static void |
709 | append_constant_op (BuildInstr *bi, unsigned op1, unsigned cnst) | |
e0001a05 | 710 | { |
add39d23 | 711 | BuildOp *b_op = XNEW (BuildOp); |
e0001a05 NC |
712 | |
713 | b_op->op_num = op1; | |
714 | b_op->typ = OP_CONSTANT; | |
715 | b_op->op_data = cnst; | |
716 | b_op->next = NULL; | |
717 | append_op (bi, b_op); | |
718 | } | |
719 | ||
720 | ||
7fa3d080 BW |
721 | static void |
722 | append_field_op (BuildInstr *bi, unsigned op1, unsigned src_op) | |
e0001a05 | 723 | { |
add39d23 | 724 | BuildOp *b_op = XNEW (BuildOp); |
e0001a05 NC |
725 | |
726 | b_op->op_num = op1; | |
727 | b_op->typ = OP_OPERAND; | |
728 | b_op->op_data = src_op; | |
729 | b_op->next = NULL; | |
730 | append_op (bi, b_op); | |
731 | } | |
732 | ||
733 | ||
734 | /* These could be generated but are not currently. */ | |
735 | ||
7fa3d080 BW |
736 | static void |
737 | append_user_fn_field_op (BuildInstr *bi, | |
738 | unsigned op1, | |
739 | OpType typ, | |
740 | unsigned src_op) | |
e0001a05 | 741 | { |
add39d23 | 742 | BuildOp *b_op = XNEW (BuildOp); |
e0001a05 NC |
743 | |
744 | b_op->op_num = op1; | |
745 | b_op->typ = typ; | |
746 | b_op->op_data = src_op; | |
747 | b_op->next = NULL; | |
748 | append_op (bi, b_op); | |
749 | } | |
750 | ||
751 | ||
752 | /* These operand functions are the semantics of user-defined | |
753 | operand functions. */ | |
754 | ||
7fa3d080 BW |
755 | static long |
756 | operand_function_HI24S (long a) | |
e0001a05 NC |
757 | { |
758 | if (a & 0x80) | |
759 | return (a & (~0xff)) + 0x100; | |
760 | else | |
761 | return (a & (~0xff)); | |
762 | } | |
763 | ||
764 | ||
7fa3d080 BW |
765 | static long |
766 | operand_function_F32MINUS (long a) | |
e0001a05 NC |
767 | { |
768 | return (32 - a); | |
769 | } | |
770 | ||
771 | ||
7fa3d080 BW |
772 | static long |
773 | operand_function_LOW8 (long a) | |
e0001a05 NC |
774 | { |
775 | if (a & 0x80) | |
776 | return (a & 0xff) | ~0xff; | |
777 | else | |
778 | return (a & 0xff); | |
779 | } | |
780 | ||
781 | ||
7fa3d080 BW |
782 | static long |
783 | operand_function_LOW16U (long a) | |
43cd72b9 BW |
784 | { |
785 | return (a & 0xffff); | |
786 | } | |
787 | ||
788 | ||
7fa3d080 BW |
789 | static long |
790 | operand_function_HI16U (long a) | |
43cd72b9 BW |
791 | { |
792 | unsigned long b = a & 0xffff0000; | |
793 | return (long) (b >> 16); | |
794 | } | |
795 | ||
796 | ||
5b7c81bd | 797 | bool |
7fa3d080 | 798 | xg_has_userdef_op_fn (OpType op) |
e0001a05 NC |
799 | { |
800 | switch (op) | |
801 | { | |
802 | case OP_OPERAND_F32MINUS: | |
803 | case OP_OPERAND_LOW8: | |
804 | case OP_OPERAND_HI24S: | |
43cd72b9 BW |
805 | case OP_OPERAND_LOW16U: |
806 | case OP_OPERAND_HI16U: | |
5b7c81bd | 807 | return true; |
e0001a05 NC |
808 | default: |
809 | break; | |
810 | } | |
5b7c81bd | 811 | return false; |
e0001a05 NC |
812 | } |
813 | ||
814 | ||
815 | long | |
7fa3d080 | 816 | xg_apply_userdef_op_fn (OpType op, long a) |
e0001a05 NC |
817 | { |
818 | switch (op) | |
819 | { | |
820 | case OP_OPERAND_F32MINUS: | |
821 | return operand_function_F32MINUS (a); | |
822 | case OP_OPERAND_LOW8: | |
823 | return operand_function_LOW8 (a); | |
824 | case OP_OPERAND_HI24S: | |
825 | return operand_function_HI24S (a); | |
43cd72b9 BW |
826 | case OP_OPERAND_LOW16U: |
827 | return operand_function_LOW16U (a); | |
828 | case OP_OPERAND_HI16U: | |
829 | return operand_function_HI16U (a); | |
e0001a05 NC |
830 | default: |
831 | break; | |
832 | } | |
5b7c81bd | 833 | return false; |
e0001a05 NC |
834 | } |
835 | ||
836 | ||
837 | /* Generate a transition table. */ | |
838 | ||
7fa3d080 BW |
839 | static const char * |
840 | enter_opname_n (const char *name, int len) | |
e0001a05 NC |
841 | { |
842 | opname_e *op; | |
843 | ||
844 | for (op = local_opnames; op != NULL; op = op->next) | |
845 | { | |
43cd72b9 BW |
846 | if (strlen (op->opname) == (unsigned) len |
847 | && strncmp (op->opname, name, len) == 0) | |
e0001a05 NC |
848 | return op->opname; |
849 | } | |
add39d23 | 850 | op = XNEW (opname_e); |
29a2809e | 851 | op->opname = xmemdup0 (name, len); |
e0001a05 NC |
852 | return op->opname; |
853 | } | |
854 | ||
855 | ||
856 | static const char * | |
7fa3d080 | 857 | enter_opname (const char *name) |
e0001a05 NC |
858 | { |
859 | opname_e *op; | |
860 | ||
861 | for (op = local_opnames; op != NULL; op = op->next) | |
862 | { | |
863 | if (strcmp (op->opname, name) == 0) | |
864 | return op->opname; | |
865 | } | |
add39d23 | 866 | op = XNEW (opname_e); |
43cd72b9 | 867 | op->opname = xstrdup (name); |
e0001a05 NC |
868 | return op->opname; |
869 | } | |
870 | ||
871 | ||
7fa3d080 BW |
872 | static void |
873 | init_opname_map (opname_map *m) | |
e0001a05 NC |
874 | { |
875 | m->head = NULL; | |
876 | m->tail = &m->head; | |
877 | } | |
878 | ||
879 | ||
7fa3d080 BW |
880 | static void |
881 | clear_opname_map (opname_map *m) | |
e0001a05 NC |
882 | { |
883 | opname_map_e *e; | |
884 | ||
885 | while (m->head != NULL) | |
886 | { | |
887 | e = m->head; | |
888 | m->head = e->next; | |
889 | free (e); | |
890 | } | |
891 | m->tail = &m->head; | |
892 | } | |
893 | ||
894 | ||
5b7c81bd | 895 | static bool |
7fa3d080 | 896 | same_operand_name (const opname_map_e *m1, const opname_map_e *m2) |
e0001a05 | 897 | { |
2b29bb41 | 898 | if (m1->operand_name == NULL || m2->operand_name == NULL) |
5b7c81bd | 899 | return false; |
e0001a05 NC |
900 | return (m1->operand_name == m2->operand_name); |
901 | } | |
902 | ||
903 | ||
7fa3d080 BW |
904 | static opname_map_e * |
905 | get_opmatch (opname_map *map, const char *operand_name) | |
e0001a05 NC |
906 | { |
907 | opname_map_e *m; | |
908 | ||
909 | for (m = map->head; m != NULL; m = m->next) | |
910 | { | |
911 | if (strcmp (m->operand_name, operand_name) == 0) | |
912 | return m; | |
913 | } | |
914 | return NULL; | |
915 | } | |
916 | ||
917 | ||
5b7c81bd | 918 | static bool |
7fa3d080 | 919 | op_is_constant (const opname_map_e *m1) |
e0001a05 NC |
920 | { |
921 | return (m1->operand_name == NULL); | |
922 | } | |
923 | ||
924 | ||
925 | static unsigned | |
7fa3d080 | 926 | op_get_constant (const opname_map_e *m1) |
e0001a05 | 927 | { |
9c2799c2 | 928 | gas_assert (m1->operand_name == NULL); |
e0001a05 NC |
929 | return m1->constant_value; |
930 | } | |
931 | ||
932 | ||
7fa3d080 BW |
933 | static void |
934 | init_precond_list (precond_list *l) | |
e0001a05 NC |
935 | { |
936 | l->head = NULL; | |
937 | l->tail = &l->head; | |
938 | } | |
939 | ||
940 | ||
7fa3d080 BW |
941 | static void |
942 | clear_precond_list (precond_list *l) | |
e0001a05 NC |
943 | { |
944 | precond_e *e; | |
945 | ||
946 | while (l->head != NULL) | |
947 | { | |
948 | e = l->head; | |
949 | l->head = e->next; | |
950 | free (e); | |
951 | } | |
952 | l->tail = &l->head; | |
953 | } | |
954 | ||
955 | ||
7fa3d080 BW |
956 | static void |
957 | init_insn_templ (insn_templ *t) | |
e0001a05 NC |
958 | { |
959 | t->opcode_name = NULL; | |
960 | init_opname_map (&t->operand_map); | |
961 | } | |
962 | ||
963 | ||
7fa3d080 BW |
964 | static void |
965 | clear_insn_templ (insn_templ *t) | |
e0001a05 NC |
966 | { |
967 | clear_opname_map (&t->operand_map); | |
968 | } | |
969 | ||
970 | ||
7fa3d080 BW |
971 | static void |
972 | init_insn_pattern (insn_pattern *p) | |
e0001a05 NC |
973 | { |
974 | init_insn_templ (&p->t); | |
975 | init_precond_list (&p->preconds); | |
43cd72b9 | 976 | p->options = NULL; |
e0001a05 NC |
977 | } |
978 | ||
979 | ||
7fa3d080 BW |
980 | static void |
981 | clear_insn_pattern (insn_pattern *p) | |
e0001a05 NC |
982 | { |
983 | clear_insn_templ (&p->t); | |
984 | clear_precond_list (&p->preconds); | |
985 | } | |
986 | ||
987 | ||
7fa3d080 BW |
988 | static void |
989 | init_insn_repl (insn_repl *r) | |
e0001a05 NC |
990 | { |
991 | r->head = NULL; | |
992 | r->tail = &r->head; | |
993 | } | |
994 | ||
995 | ||
7fa3d080 BW |
996 | static void |
997 | clear_insn_repl (insn_repl *r) | |
e0001a05 NC |
998 | { |
999 | insn_repl_e *e; | |
1000 | ||
1001 | while (r->head != NULL) | |
1002 | { | |
1003 | e = r->head; | |
1004 | r->head = e->next; | |
1005 | clear_insn_templ (&e->t); | |
1006 | } | |
1007 | r->tail = &r->head; | |
1008 | } | |
1009 | ||
1010 | ||
43cd72b9 | 1011 | static int |
7fa3d080 | 1012 | insn_templ_operand_count (const insn_templ *t) |
e0001a05 | 1013 | { |
43cd72b9 | 1014 | int i = 0; |
e0001a05 NC |
1015 | const opname_map_e *op; |
1016 | ||
43cd72b9 | 1017 | for (op = t->operand_map.head; op != NULL; op = op->next, i++) |
e0001a05 NC |
1018 | ; |
1019 | return i; | |
1020 | } | |
1021 | ||
1022 | ||
1023 | /* Convert a string to a number. E.G.: parse_constant("10", &num) */ | |
1024 | ||
5b7c81bd | 1025 | static bool |
7fa3d080 | 1026 | parse_constant (const char *in, unsigned *val_p) |
e0001a05 NC |
1027 | { |
1028 | unsigned val = 0; | |
1029 | const char *p; | |
1030 | ||
1031 | if (in == NULL) | |
5b7c81bd | 1032 | return false; |
e0001a05 NC |
1033 | p = in; |
1034 | ||
1035 | while (*p != '\0') | |
1036 | { | |
1037 | if (*p >= '0' && *p <= '9') | |
1038 | val = val * 10 + (*p - '0'); | |
1039 | else | |
5b7c81bd | 1040 | return false; |
e0001a05 NC |
1041 | ++p; |
1042 | } | |
1043 | *val_p = val; | |
5b7c81bd | 1044 | return true; |
e0001a05 NC |
1045 | } |
1046 | ||
1047 | ||
5b7c81bd | 1048 | static bool |
7fa3d080 BW |
1049 | parse_special_fn (const char *name, |
1050 | const char **fn_name_p, | |
1051 | const char **arg_name_p) | |
e0001a05 | 1052 | { |
82b8a785 | 1053 | const char *p_start; |
e0001a05 NC |
1054 | const char *p_end; |
1055 | ||
1056 | p_start = strchr (name, '('); | |
1057 | if (p_start == NULL) | |
5b7c81bd | 1058 | return false; |
e0001a05 NC |
1059 | |
1060 | p_end = strchr (p_start, ')'); | |
1061 | ||
1062 | if (p_end == NULL) | |
5b7c81bd | 1063 | return false; |
e0001a05 NC |
1064 | |
1065 | if (p_end[1] != '\0') | |
5b7c81bd | 1066 | return false; |
e0001a05 NC |
1067 | |
1068 | *fn_name_p = enter_opname_n (name, p_start - name); | |
1069 | *arg_name_p = enter_opname_n (p_start + 1, p_end - p_start - 1); | |
5b7c81bd | 1070 | return true; |
e0001a05 NC |
1071 | } |
1072 | ||
1073 | ||
7fa3d080 BW |
1074 | static const char * |
1075 | skip_white (const char *p) | |
e0001a05 NC |
1076 | { |
1077 | if (p == NULL) | |
1078 | return p; | |
1079 | while (*p == ' ') | |
1080 | ++p; | |
1081 | return p; | |
1082 | } | |
1083 | ||
1084 | ||
7fa3d080 BW |
1085 | static void |
1086 | trim_whitespace (char *in) | |
e0001a05 NC |
1087 | { |
1088 | char *last_white = NULL; | |
1089 | char *p = in; | |
1090 | ||
1091 | while (p && *p != '\0') | |
1092 | { | |
1093 | while (*p == ' ') | |
1094 | { | |
1095 | if (last_white == NULL) | |
1096 | last_white = p; | |
1097 | p++; | |
1098 | } | |
1099 | if (*p != '\0') | |
1100 | { | |
1101 | last_white = NULL; | |
1102 | p++; | |
1103 | } | |
1104 | } | |
1105 | if (last_white) | |
1106 | *last_white = '\0'; | |
1107 | } | |
1108 | ||
1109 | ||
1110 | /* Split a string into component strings where "c" is the | |
1111 | delimiter. Place the result in the split_rec. */ | |
1112 | ||
7fa3d080 BW |
1113 | static void |
1114 | split_string (split_rec *rec, | |
1115 | const char *in, | |
1116 | char c, | |
5b7c81bd | 1117 | bool elide_whitespace) |
e0001a05 | 1118 | { |
43cd72b9 BW |
1119 | int cnt = 0; |
1120 | int i; | |
e0001a05 NC |
1121 | const char *p = in; |
1122 | ||
1123 | while (p != NULL && *p != '\0') | |
1124 | { | |
1125 | cnt++; | |
1126 | p = strchr (p, c); | |
1127 | if (p) | |
1128 | p++; | |
1129 | } | |
1130 | rec->count = cnt; | |
1131 | rec->vec = NULL; | |
1132 | ||
1133 | if (rec->count == 0) | |
1134 | return; | |
1135 | ||
add39d23 | 1136 | rec->vec = XNEWVEC (char *, cnt); |
e0001a05 NC |
1137 | for (i = 0; i < cnt; i++) |
1138 | rec->vec[i] = 0; | |
1139 | ||
1140 | p = in; | |
1141 | for (i = 0; i < cnt; i++) | |
1142 | { | |
1143 | const char *q; | |
43cd72b9 | 1144 | int len; |
e0001a05 NC |
1145 | |
1146 | q = p; | |
1147 | if (elide_whitespace) | |
1148 | q = skip_white (q); | |
1149 | ||
1150 | p = strchr (q, c); | |
1151 | if (p == NULL) | |
43cd72b9 | 1152 | rec->vec[i] = xstrdup (q); |
e0001a05 NC |
1153 | else |
1154 | { | |
1155 | len = p - q; | |
29a2809e | 1156 | rec->vec[i] = xmemdup0 (q, len); |
e0001a05 NC |
1157 | p++; |
1158 | } | |
1159 | ||
1160 | if (elide_whitespace) | |
1161 | trim_whitespace (rec->vec[i]); | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | ||
7fa3d080 BW |
1166 | static void |
1167 | clear_split_rec (split_rec *rec) | |
e0001a05 | 1168 | { |
43cd72b9 | 1169 | int i; |
e0001a05 | 1170 | |
43cd72b9 | 1171 | for (i = 0; i < rec->count; i++) |
e0001a05 NC |
1172 | free (rec->vec[i]); |
1173 | ||
1174 | if (rec->count > 0) | |
1175 | free (rec->vec); | |
1176 | } | |
1177 | ||
1178 | ||
43cd72b9 BW |
1179 | /* Initialize a split record. The split record must be initialized |
1180 | before split_string is called. */ | |
1181 | ||
7fa3d080 BW |
1182 | static void |
1183 | init_split_rec (split_rec *rec) | |
e0001a05 NC |
1184 | { |
1185 | rec->vec = NULL; | |
1186 | rec->count = 0; | |
1187 | } | |
1188 | ||
1189 | ||
1190 | /* Parse an instruction template like "insn op1, op2, op3". */ | |
1191 | ||
5b7c81bd | 1192 | static bool |
7fa3d080 | 1193 | parse_insn_templ (const char *s, insn_templ *t) |
e0001a05 NC |
1194 | { |
1195 | const char *p = s; | |
43cd72b9 | 1196 | int insn_name_len; |
e0001a05 | 1197 | split_rec oprec; |
43cd72b9 BW |
1198 | int i; |
1199 | ||
1200 | /* First find the first whitespace. */ | |
e0001a05 NC |
1201 | |
1202 | init_split_rec (&oprec); | |
1203 | ||
1204 | p = skip_white (p); | |
1205 | insn_name_len = strcspn (s, " "); | |
1206 | if (insn_name_len == 0) | |
5b7c81bd | 1207 | return false; |
e0001a05 NC |
1208 | |
1209 | init_insn_templ (t); | |
1210 | t->opcode_name = enter_opname_n (p, insn_name_len); | |
1211 | ||
1212 | p = p + insn_name_len; | |
1213 | ||
1214 | /* Split by ',' and skip beginning and trailing whitespace. */ | |
5b7c81bd | 1215 | split_string (&oprec, p, ',', true); |
e0001a05 NC |
1216 | |
1217 | for (i = 0; i < oprec.count; i++) | |
1218 | { | |
1219 | const char *opname = oprec.vec[i]; | |
add39d23 | 1220 | opname_map_e *e = XNEW (opname_map_e); |
e0001a05 NC |
1221 | e->next = NULL; |
1222 | e->operand_name = NULL; | |
1223 | e->constant_value = 0; | |
1224 | e->operand_num = i; | |
1225 | ||
1226 | /* If it begins with a number, assume that it is a number. */ | |
1227 | if (opname && opname[0] >= '0' && opname[0] <= '9') | |
1228 | { | |
1229 | unsigned val; | |
1230 | ||
1231 | if (parse_constant (opname, &val)) | |
1232 | e->constant_value = val; | |
1233 | else | |
1234 | { | |
1235 | free (e); | |
1236 | clear_split_rec (&oprec); | |
1237 | clear_insn_templ (t); | |
5b7c81bd | 1238 | return false; |
e0001a05 NC |
1239 | } |
1240 | } | |
1241 | else | |
1242 | e->operand_name = enter_opname (oprec.vec[i]); | |
1243 | ||
1244 | *t->operand_map.tail = e; | |
1245 | t->operand_map.tail = &e->next; | |
1246 | } | |
1247 | clear_split_rec (&oprec); | |
5b7c81bd | 1248 | return true; |
e0001a05 NC |
1249 | } |
1250 | ||
1251 | ||
5b7c81bd | 1252 | static bool |
7fa3d080 | 1253 | parse_precond (const char *s, precond_e *precond) |
e0001a05 NC |
1254 | { |
1255 | /* All preconditions are currently of the form: | |
1256 | a == b or a != b or a == k (where k is a constant). | |
1257 | Later we may use some special functions like DENSITY == 1 | |
1258 | to identify when density is available. */ | |
1259 | ||
1260 | const char *p = s; | |
43cd72b9 | 1261 | int len; |
e0001a05 NC |
1262 | precond->opname1 = NULL; |
1263 | precond->opval1 = 0; | |
1264 | precond->cmpop = OP_EQUAL; | |
1265 | precond->opname2 = NULL; | |
1266 | precond->opval2 = 0; | |
1267 | precond->next = NULL; | |
1268 | ||
1269 | p = skip_white (p); | |
1270 | ||
1271 | len = strcspn (p, " !="); | |
1272 | ||
1273 | if (len == 0) | |
5b7c81bd | 1274 | return false; |
e0001a05 NC |
1275 | |
1276 | precond->opname1 = enter_opname_n (p, len); | |
1277 | p = p + len; | |
1278 | p = skip_white (p); | |
1279 | ||
1280 | /* Check for "==" and "!=". */ | |
d34049e8 | 1281 | if (startswith (p, "==")) |
e0001a05 | 1282 | precond->cmpop = OP_EQUAL; |
d34049e8 | 1283 | else if (startswith (p, "!=")) |
e0001a05 NC |
1284 | precond->cmpop = OP_NOTEQUAL; |
1285 | else | |
5b7c81bd | 1286 | return false; |
e0001a05 NC |
1287 | |
1288 | p = p + 2; | |
1289 | p = skip_white (p); | |
1290 | ||
1291 | /* No trailing whitespace from earlier parsing. */ | |
1292 | if (p[0] >= '0' && p[0] <= '9') | |
1293 | { | |
1294 | unsigned val; | |
1295 | if (parse_constant (p, &val)) | |
1296 | precond->opval2 = val; | |
1297 | else | |
5b7c81bd | 1298 | return false; |
e0001a05 NC |
1299 | } |
1300 | else | |
1301 | precond->opname2 = enter_opname (p); | |
5b7c81bd | 1302 | return true; |
e0001a05 NC |
1303 | } |
1304 | ||
1305 | ||
7fa3d080 BW |
1306 | static void |
1307 | clear_req_or_option_list (ReqOrOption **r_p) | |
43cd72b9 BW |
1308 | { |
1309 | if (*r_p == NULL) | |
1310 | return; | |
1311 | ||
1312 | free ((*r_p)->option_name); | |
1313 | clear_req_or_option_list (&(*r_p)->next); | |
1314 | *r_p = NULL; | |
1315 | } | |
1316 | ||
1317 | ||
7fa3d080 BW |
1318 | static void |
1319 | clear_req_option_list (ReqOption **r_p) | |
43cd72b9 BW |
1320 | { |
1321 | if (*r_p == NULL) | |
1322 | return; | |
1323 | ||
1324 | clear_req_or_option_list (&(*r_p)->or_option_terms); | |
1325 | clear_req_option_list (&(*r_p)->next); | |
1326 | *r_p = NULL; | |
1327 | } | |
1328 | ||
1329 | ||
7fa3d080 BW |
1330 | static ReqOrOption * |
1331 | clone_req_or_option_list (ReqOrOption *req_or_option) | |
43cd72b9 BW |
1332 | { |
1333 | ReqOrOption *new_req_or_option; | |
1334 | ||
1335 | if (req_or_option == NULL) | |
1336 | return NULL; | |
1337 | ||
add39d23 | 1338 | new_req_or_option = XNEW (ReqOrOption); |
43cd72b9 BW |
1339 | new_req_or_option->option_name = xstrdup (req_or_option->option_name); |
1340 | new_req_or_option->is_true = req_or_option->is_true; | |
1341 | new_req_or_option->next = NULL; | |
1342 | new_req_or_option->next = clone_req_or_option_list (req_or_option->next); | |
1343 | return new_req_or_option; | |
1344 | } | |
1345 | ||
1346 | ||
7fa3d080 BW |
1347 | static ReqOption * |
1348 | clone_req_option_list (ReqOption *req_option) | |
43cd72b9 BW |
1349 | { |
1350 | ReqOption *new_req_option; | |
1351 | ||
1352 | if (req_option == NULL) | |
1353 | return NULL; | |
1354 | ||
add39d23 | 1355 | new_req_option = XNEW (ReqOption); |
43cd72b9 BW |
1356 | new_req_option->or_option_terms = NULL; |
1357 | new_req_option->next = NULL; | |
c138bc38 | 1358 | new_req_option->or_option_terms = |
43cd72b9 BW |
1359 | clone_req_or_option_list (req_option->or_option_terms); |
1360 | new_req_option->next = clone_req_option_list (req_option->next); | |
1361 | return new_req_option; | |
1362 | } | |
1363 | ||
1364 | ||
5b7c81bd | 1365 | static bool |
7fa3d080 | 1366 | parse_option_cond (const char *s, ReqOption *option) |
43cd72b9 BW |
1367 | { |
1368 | int i; | |
1369 | split_rec option_term_rec; | |
1370 | ||
1371 | /* All option or conditions are of the form: | |
1372 | optionA + no-optionB + ... | |
1373 | "Ands" are divided by "?". */ | |
1374 | ||
1375 | init_split_rec (&option_term_rec); | |
5b7c81bd | 1376 | split_string (&option_term_rec, s, '+', true); |
43cd72b9 BW |
1377 | |
1378 | if (option_term_rec.count == 0) | |
1379 | { | |
1380 | clear_split_rec (&option_term_rec); | |
5b7c81bd | 1381 | return false; |
43cd72b9 BW |
1382 | } |
1383 | ||
1384 | for (i = 0; i < option_term_rec.count; i++) | |
1385 | { | |
1386 | char *option_name = option_term_rec.vec[i]; | |
5b7c81bd | 1387 | bool is_true = true; |
43cd72b9 BW |
1388 | ReqOrOption *req; |
1389 | ReqOrOption **r_p; | |
1390 | ||
d34049e8 | 1391 | if (startswith (option_name, "no-")) |
43cd72b9 BW |
1392 | { |
1393 | option_name = xstrdup (&option_name[3]); | |
5b7c81bd | 1394 | is_true = false; |
43cd72b9 BW |
1395 | } |
1396 | else | |
1397 | option_name = xstrdup (option_name); | |
1398 | ||
add39d23 | 1399 | req = XNEW (ReqOrOption); |
43cd72b9 BW |
1400 | req->option_name = option_name; |
1401 | req->is_true = is_true; | |
1402 | req->next = NULL; | |
1403 | ||
1404 | /* Append to list. */ | |
c138bc38 | 1405 | for (r_p = &option->or_option_terms; (*r_p) != NULL; |
43cd72b9 BW |
1406 | r_p = &(*r_p)->next) |
1407 | ; | |
1408 | (*r_p) = req; | |
1409 | } | |
5b7c81bd | 1410 | return true; |
43cd72b9 BW |
1411 | } |
1412 | ||
1413 | ||
e0001a05 NC |
1414 | /* Parse a string like: |
1415 | "insn op1, op2, op3, op4 | op1 != op2 | op2 == op3 | op4 == 1". | |
1416 | I.E., instruction "insn" with 4 operands where operand 1 and 2 are not | |
43cd72b9 BW |
1417 | the same and operand 2 and 3 are the same and operand 4 is 1. |
1418 | ||
1419 | or: | |
1420 | ||
1421 | "insn op1 | op1 == 1 / density + boolean / no-useroption". | |
1422 | i.e. instruction "insn" with 1 operands where operand 1 is 1 | |
1423 | when "density" or "boolean" options are available and | |
1424 | "useroption" is not available. | |
1425 | ||
1426 | Because the current implementation of this parsing scheme uses | |
1427 | split_string, it requires that '|' and '?' are only used as | |
1428 | delimiters for predicates and required options. */ | |
e0001a05 | 1429 | |
5b7c81bd | 1430 | static bool |
7fa3d080 | 1431 | parse_insn_pattern (const char *in, insn_pattern *insn) |
e0001a05 | 1432 | { |
e0001a05 | 1433 | split_rec rec; |
43cd72b9 BW |
1434 | split_rec optionrec; |
1435 | int i; | |
e0001a05 | 1436 | |
e0001a05 NC |
1437 | init_insn_pattern (insn); |
1438 | ||
43cd72b9 | 1439 | init_split_rec (&optionrec); |
5b7c81bd | 1440 | split_string (&optionrec, in, '?', true); |
43cd72b9 BW |
1441 | if (optionrec.count == 0) |
1442 | { | |
1443 | clear_split_rec (&optionrec); | |
5b7c81bd | 1444 | return false; |
43cd72b9 | 1445 | } |
c138bc38 | 1446 | |
43cd72b9 BW |
1447 | init_split_rec (&rec); |
1448 | ||
5b7c81bd | 1449 | split_string (&rec, optionrec.vec[0], '|', true); |
e0001a05 NC |
1450 | |
1451 | if (rec.count == 0) | |
1452 | { | |
1453 | clear_split_rec (&rec); | |
43cd72b9 | 1454 | clear_split_rec (&optionrec); |
5b7c81bd | 1455 | return false; |
e0001a05 NC |
1456 | } |
1457 | ||
1458 | if (!parse_insn_templ (rec.vec[0], &insn->t)) | |
1459 | { | |
1460 | clear_split_rec (&rec); | |
43cd72b9 | 1461 | clear_split_rec (&optionrec); |
5b7c81bd | 1462 | return false; |
e0001a05 NC |
1463 | } |
1464 | ||
1465 | for (i = 1; i < rec.count; i++) | |
1466 | { | |
add39d23 | 1467 | precond_e *cond = XNEW (precond_e); |
e0001a05 NC |
1468 | |
1469 | if (!parse_precond (rec.vec[i], cond)) | |
1470 | { | |
1471 | clear_split_rec (&rec); | |
43cd72b9 | 1472 | clear_split_rec (&optionrec); |
e0001a05 | 1473 | clear_insn_pattern (insn); |
5b7c81bd | 1474 | return false; |
e0001a05 NC |
1475 | } |
1476 | ||
1477 | /* Append the condition. */ | |
1478 | *insn->preconds.tail = cond; | |
1479 | insn->preconds.tail = &cond->next; | |
1480 | } | |
1481 | ||
43cd72b9 BW |
1482 | for (i = 1; i < optionrec.count; i++) |
1483 | { | |
1484 | /* Handle the option conditions. */ | |
1485 | ReqOption **r_p; | |
add39d23 | 1486 | ReqOption *req_option = XNEW (ReqOption); |
43cd72b9 BW |
1487 | req_option->or_option_terms = NULL; |
1488 | req_option->next = NULL; | |
c138bc38 | 1489 | |
43cd72b9 BW |
1490 | if (!parse_option_cond (optionrec.vec[i], req_option)) |
1491 | { | |
1492 | clear_split_rec (&rec); | |
1493 | clear_split_rec (&optionrec); | |
1494 | clear_insn_pattern (insn); | |
1495 | clear_req_option_list (&req_option); | |
5b7c81bd | 1496 | return false; |
43cd72b9 BW |
1497 | } |
1498 | ||
1499 | /* Append the condition. */ | |
1500 | for (r_p = &insn->options; (*r_p) != NULL; r_p = &(*r_p)->next) | |
1501 | ; | |
1502 | ||
1503 | (*r_p) = req_option; | |
1504 | } | |
1505 | ||
e0001a05 | 1506 | clear_split_rec (&rec); |
43cd72b9 | 1507 | clear_split_rec (&optionrec); |
5b7c81bd | 1508 | return true; |
e0001a05 NC |
1509 | } |
1510 | ||
1511 | ||
5b7c81bd | 1512 | static bool |
7fa3d080 | 1513 | parse_insn_repl (const char *in, insn_repl *r_p) |
e0001a05 NC |
1514 | { |
1515 | /* This is a list of instruction templates separated by ';'. */ | |
1516 | split_rec rec; | |
43cd72b9 | 1517 | int i; |
e0001a05 | 1518 | |
5b7c81bd | 1519 | split_string (&rec, in, ';', true); |
e0001a05 NC |
1520 | |
1521 | for (i = 0; i < rec.count; i++) | |
1522 | { | |
add39d23 | 1523 | insn_repl_e *e = XNEW (insn_repl_e); |
e0001a05 NC |
1524 | |
1525 | e->next = NULL; | |
1526 | ||
1527 | if (!parse_insn_templ (rec.vec[i], &e->t)) | |
1528 | { | |
1529 | free (e); | |
1530 | clear_insn_repl (r_p); | |
5b7c81bd | 1531 | return false; |
e0001a05 NC |
1532 | } |
1533 | *r_p->tail = e; | |
1534 | r_p->tail = &e->next; | |
1535 | } | |
5b7c81bd | 1536 | return true; |
e0001a05 NC |
1537 | } |
1538 | ||
1539 | ||
5b7c81bd | 1540 | static bool |
7fa3d080 BW |
1541 | transition_applies (insn_pattern *initial_insn, |
1542 | const char *from_string ATTRIBUTE_UNUSED, | |
1543 | const char *to_string ATTRIBUTE_UNUSED) | |
43cd72b9 BW |
1544 | { |
1545 | ReqOption *req_option; | |
1546 | ||
1547 | for (req_option = initial_insn->options; | |
1548 | req_option != NULL; | |
1549 | req_option = req_option->next) | |
1550 | { | |
1551 | ReqOrOption *req_or_option = req_option->or_option_terms; | |
1552 | ||
1553 | if (req_or_option == NULL | |
1554 | || req_or_option->next != NULL) | |
1555 | continue; | |
1556 | ||
d34049e8 | 1557 | if (startswith (req_or_option->option_name, "IsaUse")) |
43cd72b9 | 1558 | { |
5b7c81bd | 1559 | bool option_available = false; |
43cd72b9 BW |
1560 | char *option_name = req_or_option->option_name + 6; |
1561 | if (!strcmp (option_name, "DensityInstruction")) | |
1562 | option_available = (XCHAL_HAVE_DENSITY == 1); | |
1563 | else if (!strcmp (option_name, "L32R")) | |
1564 | option_available = (XCHAL_HAVE_L32R == 1); | |
1565 | else if (!strcmp (option_name, "Const16")) | |
1566 | option_available = (XCHAL_HAVE_CONST16 == 1); | |
1567 | else if (!strcmp (option_name, "Loops")) | |
1568 | option_available = (XCHAL_HAVE_LOOPS == 1); | |
b2d179be | 1569 | else if (!strcmp (option_name, "WideBranches")) |
3739860c | 1570 | option_available |
19fc3723 | 1571 | = (XCHAL_HAVE_WIDE_BRANCHES == 1 && produce_flix == FLIX_ALL); |
43cd72b9 | 1572 | else if (!strcmp (option_name, "PredictedBranches")) |
19fc3723 SA |
1573 | option_available |
1574 | = (XCHAL_HAVE_PREDICTED_BRANCHES == 1 | |
1575 | && produce_flix == FLIX_ALL); | |
43cd72b9 BW |
1576 | else if (!strcmp (option_name, "Booleans")) |
1577 | option_available = (XCHAL_HAVE_BOOLEANS == 1); | |
1578 | else | |
1579 | as_warn (_("invalid configuration option '%s' in transition rule '%s'"), | |
1580 | req_or_option->option_name, from_string); | |
1581 | if ((option_available ^ req_or_option->is_true) != 0) | |
5b7c81bd | 1582 | return false; |
43cd72b9 BW |
1583 | } |
1584 | else if (strcmp (req_or_option->option_name, "realnop") == 0) | |
1585 | { | |
5b7c81bd | 1586 | bool nop_available = |
43cd72b9 BW |
1587 | (xtensa_opcode_lookup (xtensa_default_isa, "nop") |
1588 | != XTENSA_UNDEFINED); | |
1589 | if ((nop_available ^ req_or_option->is_true) != 0) | |
5b7c81bd | 1590 | return false; |
43cd72b9 BW |
1591 | } |
1592 | } | |
5b7c81bd | 1593 | return true; |
43cd72b9 BW |
1594 | } |
1595 | ||
1596 | ||
5b7c81bd | 1597 | static bool |
1946c96e | 1598 | wide_branch_opcode (const char *opcode_name, |
b9bb4a93 | 1599 | const char *suffix, |
1946c96e BW |
1600 | xtensa_opcode *popcode) |
1601 | { | |
1602 | xtensa_isa isa = xtensa_default_isa; | |
1603 | xtensa_opcode opcode; | |
1604 | static char wbr_name_buf[20]; | |
1605 | ||
d34049e8 | 1606 | if (!startswith (opcode_name, "WIDE.")) |
5b7c81bd | 1607 | return false; |
1946c96e BW |
1608 | |
1609 | strcpy (wbr_name_buf, opcode_name + 5); | |
1610 | strcat (wbr_name_buf, suffix); | |
1611 | opcode = xtensa_opcode_lookup (isa, wbr_name_buf); | |
1612 | if (opcode != XTENSA_UNDEFINED) | |
1613 | { | |
1614 | *popcode = opcode; | |
5b7c81bd | 1615 | return true; |
1946c96e BW |
1616 | } |
1617 | ||
5b7c81bd | 1618 | return false; |
1946c96e BW |
1619 | } |
1620 | ||
1621 | ||
7fa3d080 BW |
1622 | static TransitionRule * |
1623 | build_transition (insn_pattern *initial_insn, | |
1624 | insn_repl *replace_insns, | |
1625 | const char *from_string, | |
1626 | const char *to_string) | |
e0001a05 NC |
1627 | { |
1628 | TransitionRule *tr = NULL; | |
1629 | xtensa_opcode opcode; | |
1630 | xtensa_isa isa = xtensa_default_isa; | |
28dbbc02 | 1631 | BuildInstr *literal_bi; |
e0001a05 NC |
1632 | |
1633 | opname_map_e *op1; | |
1634 | opname_map_e *op2; | |
1635 | ||
1636 | precond_e *precond; | |
1637 | insn_repl_e *r; | |
e0001a05 | 1638 | |
3739860c | 1639 | if (!wide_branch_opcode (initial_insn->t.opcode_name, ".w18", &opcode) |
b81bf389 BW |
1640 | && !wide_branch_opcode (initial_insn->t.opcode_name, ".w15", &opcode)) |
1641 | opcode = xtensa_opcode_lookup (isa, initial_insn->t.opcode_name); | |
1642 | ||
e0001a05 NC |
1643 | if (opcode == XTENSA_UNDEFINED) |
1644 | { | |
1645 | /* It is OK to not be able to translate some of these opcodes. */ | |
e0001a05 NC |
1646 | return NULL; |
1647 | } | |
1648 | ||
1649 | ||
43cd72b9 BW |
1650 | if (xtensa_opcode_num_operands (isa, opcode) |
1651 | != insn_templ_operand_count (&initial_insn->t)) | |
e0001a05 NC |
1652 | { |
1653 | /* This is also OK because there are opcodes that | |
1654 | have different numbers of operands on different | |
1655 | architecture variations. */ | |
e0001a05 NC |
1656 | return NULL; |
1657 | } | |
1658 | ||
add39d23 | 1659 | tr = XNEW (TransitionRule); |
e0001a05 NC |
1660 | tr->opcode = opcode; |
1661 | tr->conditions = NULL; | |
1662 | tr->to_instr = NULL; | |
1663 | ||
1664 | /* Build the conditions. First, equivalent operand condition.... */ | |
1665 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) | |
1666 | { | |
1667 | for (op2 = op1->next; op2 != NULL; op2 = op2->next) | |
1668 | { | |
1669 | if (same_operand_name (op1, op2)) | |
1670 | { | |
1671 | append_value_condition (tr, OP_EQUAL, | |
1672 | op1->operand_num, op2->operand_num); | |
1673 | } | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | /* Now the condition that an operand value must be a constant.... */ | |
1678 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) | |
1679 | { | |
1680 | if (op_is_constant (op1)) | |
1681 | { | |
1682 | append_constant_value_condition (tr, | |
1683 | OP_EQUAL, | |
1684 | op1->operand_num, | |
1685 | op_get_constant (op1)); | |
1686 | } | |
1687 | } | |
1688 | ||
1689 | ||
1690 | /* Now add the explicit preconditions listed after the "|" in the spec. | |
1691 | These are currently very limited, so we do a special case | |
1692 | parse for them. We expect spaces, opname != opname. */ | |
1693 | for (precond = initial_insn->preconds.head; | |
1694 | precond != NULL; | |
1695 | precond = precond->next) | |
1696 | { | |
1697 | op1 = NULL; | |
1698 | op2 = NULL; | |
1699 | ||
1700 | if (precond->opname1) | |
1701 | { | |
1702 | op1 = get_opmatch (&initial_insn->t.operand_map, precond->opname1); | |
1703 | if (op1 == NULL) | |
bc447904 BW |
1704 | as_fatal (_("opcode '%s': no bound opname '%s' " |
1705 | "for precondition in '%s'"), | |
1706 | xtensa_opcode_name (isa, opcode), | |
1707 | precond->opname1, from_string); | |
e0001a05 NC |
1708 | } |
1709 | ||
1710 | if (precond->opname2) | |
1711 | { | |
1712 | op2 = get_opmatch (&initial_insn->t.operand_map, precond->opname2); | |
1713 | if (op2 == NULL) | |
bc447904 | 1714 | as_fatal (_("opcode '%s': no bound opname '%s' " |
33eaf5de | 1715 | "for precondition in '%s'"), |
bc447904 BW |
1716 | xtensa_opcode_name (isa, opcode), |
1717 | precond->opname2, from_string); | |
e0001a05 NC |
1718 | } |
1719 | ||
1720 | if (op1 == NULL && op2 == NULL) | |
bc447904 BW |
1721 | as_fatal (_("opcode '%s': precondition only contains " |
1722 | "constants in '%s'"), | |
1723 | xtensa_opcode_name (isa, opcode), from_string); | |
e0001a05 NC |
1724 | else if (op1 != NULL && op2 != NULL) |
1725 | append_value_condition (tr, precond->cmpop, | |
1726 | op1->operand_num, op2->operand_num); | |
1727 | else if (op2 == NULL) | |
1728 | append_constant_value_condition (tr, precond->cmpop, | |
43cd72b9 | 1729 | op1->operand_num, precond->opval2); |
e0001a05 NC |
1730 | else |
1731 | append_constant_value_condition (tr, precond->cmpop, | |
43cd72b9 | 1732 | op2->operand_num, precond->opval1); |
e0001a05 NC |
1733 | } |
1734 | ||
43cd72b9 BW |
1735 | tr->options = clone_req_option_list (initial_insn->options); |
1736 | ||
e0001a05 | 1737 | /* Generate the replacement instructions. Some of these |
61376837 BW |
1738 | "instructions" are actually labels and literals. There can be at |
1739 | most one literal and at most one label. A literal must be defined | |
1740 | (e.g., "LITERAL %imm") before use (e.g., "%LITERAL"). The labels | |
1741 | can be used before they are defined. Also there are a number of | |
1742 | special operands (e.g., HI24S). */ | |
e0001a05 | 1743 | |
28dbbc02 | 1744 | literal_bi = NULL; |
e0001a05 NC |
1745 | for (r = replace_insns->head; r != NULL; r = r->next) |
1746 | { | |
1747 | BuildInstr *bi; | |
1748 | const char *opcode_name; | |
43cd72b9 | 1749 | int operand_count; |
e0001a05 | 1750 | opname_map_e *op; |
e0001a05 NC |
1751 | const char *fn_name; |
1752 | const char *operand_arg_name; | |
1753 | ||
add39d23 | 1754 | bi = XNEW (BuildInstr); |
e0001a05 NC |
1755 | append_build_insn (tr, bi); |
1756 | ||
e0001a05 NC |
1757 | bi->opcode = XTENSA_UNDEFINED; |
1758 | bi->ops = NULL; | |
1759 | bi->next = NULL; | |
1760 | ||
1761 | opcode_name = r->t.opcode_name; | |
1762 | operand_count = insn_templ_operand_count (&r->t); | |
1763 | ||
61376837 | 1764 | if (strcmp (opcode_name, "LITERAL") == 0) |
e0001a05 NC |
1765 | { |
1766 | bi->typ = INSTR_LITERAL_DEF; | |
e0001a05 NC |
1767 | if (operand_count != 1) |
1768 | as_fatal (_("expected one operand for generated literal")); | |
28dbbc02 | 1769 | literal_bi = bi; |
e0001a05 | 1770 | } |
61376837 | 1771 | else if (strcmp (opcode_name, "LABEL") == 0) |
e0001a05 NC |
1772 | { |
1773 | bi->typ = INSTR_LABEL_DEF; | |
e0001a05 NC |
1774 | if (operand_count != 0) |
1775 | as_fatal (_("expected 0 operands for generated label")); | |
1776 | } | |
1777 | else | |
1778 | { | |
1779 | bi->typ = INSTR_INSTR; | |
1946c96e BW |
1780 | if (wide_branch_opcode (opcode_name, ".w18", &bi->opcode) |
1781 | || wide_branch_opcode (opcode_name, ".w15", &bi->opcode)) | |
1782 | opcode_name = xtensa_opcode_name (isa, bi->opcode); | |
1783 | else | |
1784 | bi->opcode = xtensa_opcode_lookup (isa, opcode_name); | |
1785 | ||
e0001a05 | 1786 | if (bi->opcode == XTENSA_UNDEFINED) |
43cd72b9 BW |
1787 | { |
1788 | as_warn (_("invalid opcode '%s' in transition rule '%s'"), | |
1946c96e | 1789 | opcode_name, to_string); |
43cd72b9 BW |
1790 | return NULL; |
1791 | } | |
1946c96e | 1792 | |
e0001a05 | 1793 | /* Check for the right number of ops. */ |
c138bc38 | 1794 | if (xtensa_opcode_num_operands (isa, bi->opcode) |
e0001a05 | 1795 | != (int) operand_count) |
992a06ee AM |
1796 | as_fatal (ngettext ("opcode '%s': replacement does not have %d op", |
1797 | "opcode '%s': replacement does not have %d ops", | |
1798 | xtensa_opcode_num_operands (isa, bi->opcode)), | |
43cd72b9 BW |
1799 | opcode_name, |
1800 | xtensa_opcode_num_operands (isa, bi->opcode)); | |
e0001a05 NC |
1801 | } |
1802 | ||
1803 | for (op = r->t.operand_map.head; op != NULL; op = op->next) | |
1804 | { | |
1805 | unsigned idnum; | |
1806 | ||
1807 | if (op_is_constant (op)) | |
1808 | append_constant_op (bi, op->operand_num, op_get_constant (op)); | |
61376837 | 1809 | else if (strcmp (op->operand_name, "%LITERAL") == 0) |
28dbbc02 BW |
1810 | { |
1811 | if (! literal_bi || ! literal_bi->ops || literal_bi->ops->next) | |
1812 | as_fatal (_("opcode '%s': cannot find literal definition"), | |
1813 | opcode_name); | |
1814 | append_literal_op (bi, op->operand_num, | |
1815 | literal_bi->ops->op_data); | |
1816 | } | |
61376837 BW |
1817 | else if (strcmp (op->operand_name, "%LABEL") == 0) |
1818 | append_label_op (bi, op->operand_num); | |
1819 | else if (op->operand_name[0] == 'a' | |
1820 | && parse_constant (op->operand_name + 1, &idnum)) | |
e0001a05 NC |
1821 | append_constant_op (bi, op->operand_num, idnum); |
1822 | else if (op->operand_name[0] == '%') | |
1823 | { | |
1824 | opname_map_e *orig_op; | |
1825 | orig_op = get_opmatch (&initial_insn->t.operand_map, | |
1826 | op->operand_name); | |
1827 | if (orig_op == NULL) | |
33eaf5de | 1828 | as_fatal (_("opcode '%s': unidentified operand '%s' in '%s'"), |
bc447904 BW |
1829 | opcode_name, op->operand_name, to_string); |
1830 | append_field_op (bi, op->operand_num, orig_op->operand_num); | |
e0001a05 | 1831 | } |
19e8f41a BW |
1832 | else if (strcmp (op->operand_name, "FREEREG") == 0) |
1833 | { | |
1834 | append_user_fn_field_op (bi, op->operand_num, OP_FREEREG, 0); | |
1835 | } | |
e0001a05 NC |
1836 | else if (parse_special_fn (op->operand_name, |
1837 | &fn_name, &operand_arg_name)) | |
1838 | { | |
1839 | opname_map_e *orig_op; | |
1840 | OpType typ = OP_CONSTANT; | |
1841 | ||
1842 | if (strcmp (fn_name, "LOW8") == 0) | |
1843 | typ = OP_OPERAND_LOW8; | |
1844 | else if (strcmp (fn_name, "HI24S") == 0) | |
1845 | typ = OP_OPERAND_HI24S; | |
1846 | else if (strcmp (fn_name, "F32MINUS") == 0) | |
1847 | typ = OP_OPERAND_F32MINUS; | |
43cd72b9 BW |
1848 | else if (strcmp (fn_name, "LOW16U") == 0) |
1849 | typ = OP_OPERAND_LOW16U; | |
1850 | else if (strcmp (fn_name, "HI16U") == 0) | |
1851 | typ = OP_OPERAND_HI16U; | |
e0001a05 | 1852 | else |
43cd72b9 | 1853 | as_fatal (_("unknown user-defined function %s"), fn_name); |
e0001a05 NC |
1854 | |
1855 | orig_op = get_opmatch (&initial_insn->t.operand_map, | |
1856 | operand_arg_name); | |
1857 | if (orig_op == NULL) | |
33eaf5de | 1858 | as_fatal (_("opcode '%s': unidentified operand '%s' in '%s'"), |
bc447904 BW |
1859 | opcode_name, op->operand_name, to_string); |
1860 | append_user_fn_field_op (bi, op->operand_num, | |
1861 | typ, orig_op->operand_num); | |
e0001a05 NC |
1862 | } |
1863 | else | |
33eaf5de | 1864 | as_fatal (_("opcode '%s': could not parse operand '%s' in '%s'"), |
bc447904 | 1865 | opcode_name, op->operand_name, to_string); |
e0001a05 NC |
1866 | } |
1867 | } | |
e0001a05 NC |
1868 | |
1869 | return tr; | |
1870 | } | |
1871 | ||
1872 | ||
7fa3d080 BW |
1873 | static TransitionTable * |
1874 | build_transition_table (const string_pattern_pair *transitions, | |
1875 | int transition_count, | |
1876 | transition_cmp_fn cmp) | |
e0001a05 NC |
1877 | { |
1878 | TransitionTable *table = NULL; | |
43cd72b9 BW |
1879 | int num_opcodes = xtensa_isa_num_opcodes (xtensa_default_isa); |
1880 | int i, tnum; | |
e0001a05 NC |
1881 | |
1882 | if (table != NULL) | |
1883 | return table; | |
1884 | ||
1885 | /* Otherwise, build it now. */ | |
add39d23 | 1886 | table = XNEW (TransitionTable); |
e0001a05 | 1887 | table->num_opcodes = num_opcodes; |
add39d23 | 1888 | table->table = XNEWVEC (TransitionList *, num_opcodes); |
e0001a05 NC |
1889 | |
1890 | for (i = 0; i < num_opcodes; i++) | |
1891 | table->table[i] = NULL; | |
1892 | ||
1893 | for (tnum = 0; tnum < transition_count; tnum++) | |
1894 | { | |
1895 | const char *from_string = transitions[tnum].pattern; | |
1896 | const char *to_string = transitions[tnum].replacement; | |
1897 | ||
1898 | insn_pattern initial_insn; | |
1899 | insn_repl replace_insns; | |
1900 | TransitionRule *tr; | |
1901 | ||
1902 | init_insn_pattern (&initial_insn); | |
1903 | if (!parse_insn_pattern (from_string, &initial_insn)) | |
bc447904 | 1904 | as_fatal (_("could not parse INSN_PATTERN '%s'"), from_string); |
e0001a05 NC |
1905 | |
1906 | init_insn_repl (&replace_insns); | |
1907 | if (!parse_insn_repl (to_string, &replace_insns)) | |
bc447904 | 1908 | as_fatal (_("could not parse INSN_REPL '%s'"), to_string); |
e0001a05 | 1909 | |
43cd72b9 BW |
1910 | if (transition_applies (&initial_insn, from_string, to_string)) |
1911 | { | |
1912 | tr = build_transition (&initial_insn, &replace_insns, | |
1913 | from_string, to_string); | |
1914 | if (tr) | |
1915 | append_transition (table, tr->opcode, tr, cmp); | |
1916 | else | |
1917 | { | |
1918 | #if TENSILICA_DEBUG | |
1919 | as_warn (_("could not build transition for %s => %s"), | |
1920 | from_string, to_string); | |
1921 | #endif | |
1922 | } | |
1923 | } | |
e0001a05 NC |
1924 | |
1925 | clear_insn_repl (&replace_insns); | |
1926 | clear_insn_pattern (&initial_insn); | |
1927 | } | |
1928 | return table; | |
1929 | } | |
1930 | ||
1931 | \f | |
1932 | extern TransitionTable * | |
7fa3d080 | 1933 | xg_build_widen_table (transition_cmp_fn cmp) |
e0001a05 NC |
1934 | { |
1935 | static TransitionTable *table = NULL; | |
1936 | if (table == NULL) | |
43cd72b9 | 1937 | table = build_transition_table (widen_spec_list, WIDEN_COUNT, cmp); |
e0001a05 NC |
1938 | return table; |
1939 | } | |
1940 | ||
1941 | ||
1942 | extern TransitionTable * | |
7fa3d080 | 1943 | xg_build_simplify_table (transition_cmp_fn cmp) |
e0001a05 NC |
1944 | { |
1945 | static TransitionTable *table = NULL; | |
1946 | if (table == NULL) | |
43cd72b9 | 1947 | table = build_transition_table (simplify_spec_list, SIMPLIFY_COUNT, cmp); |
e0001a05 NC |
1948 | return table; |
1949 | } |