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e0001a05 | 1 | /* Table of relaxations for Xtensa assembly. |
bc447904 | 2 | Copyright 2003, 2004, 2005, 2007 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 | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
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", | |
61376837 | 90 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l32i %at,%at,0"} |
e0001a05 NC |
91 | |
92 | There is special case for loop instructions here, but because we do | |
93 | not currently have the ability to represent the difference of two | |
94 | symbols, the conversion requires special code in the assembler to | |
95 | write the operands of the addi/addmi pair representing the | |
96 | difference of the old and new loop end label. */ | |
97 | ||
98 | #include "as.h" | |
99 | #include "xtensa-isa.h" | |
100 | #include "xtensa-relax.h" | |
101 | #include <stddef.h> | |
43cd72b9 | 102 | #include "xtensa-config.h" |
e0001a05 | 103 | |
395fa56f BW |
104 | #ifndef XCHAL_HAVE_WIDE_BRANCHES |
105 | #define XCHAL_HAVE_WIDE_BRANCHES 0 | |
106 | #endif | |
107 | ||
e0001a05 NC |
108 | /* Imported from bfd. */ |
109 | extern xtensa_isa xtensa_default_isa; | |
110 | ||
e0001a05 NC |
111 | /* The opname_list is a small list of names that we use for opcode and |
112 | operand variable names to simplify ownership of these commonly used | |
113 | strings. Strings entered in the table can be compared by pointer | |
114 | equality. */ | |
115 | ||
116 | typedef struct opname_list_struct opname_list; | |
117 | typedef opname_list opname_e; | |
118 | ||
119 | struct opname_list_struct | |
120 | { | |
121 | char *opname; | |
122 | opname_list *next; | |
123 | }; | |
124 | ||
125 | static opname_list *local_opnames = NULL; | |
126 | ||
127 | ||
128 | /* The "opname_map" and its element structure "opname_map_e" are used | |
129 | for binding an operand number to a name or a constant. */ | |
130 | ||
131 | typedef struct opname_map_e_struct opname_map_e; | |
132 | typedef struct opname_map_struct opname_map; | |
133 | ||
134 | struct opname_map_e_struct | |
135 | { | |
136 | const char *operand_name; /* If null, then use constant_value. */ | |
43cd72b9 | 137 | int operand_num; |
e0001a05 NC |
138 | unsigned constant_value; |
139 | opname_map_e *next; | |
140 | }; | |
141 | ||
142 | struct opname_map_struct | |
143 | { | |
144 | opname_map_e *head; | |
145 | opname_map_e **tail; | |
146 | }; | |
147 | ||
148 | /* The "precond_list" and its element structure "precond_e" represents | |
149 | explicit preconditions comparing operand variables and constants. | |
150 | In the "precond_e" structure, a variable is identified by the name | |
151 | in the "opname" field. If that field is NULL, then the operand | |
152 | is the constant in field "opval". */ | |
153 | ||
154 | typedef struct precond_e_struct precond_e; | |
155 | typedef struct precond_list_struct precond_list; | |
156 | ||
157 | struct precond_e_struct | |
158 | { | |
159 | const char *opname1; | |
160 | unsigned opval1; | |
161 | CmpOp cmpop; | |
162 | const char *opname2; | |
163 | unsigned opval2; | |
164 | precond_e *next; | |
165 | }; | |
166 | ||
167 | struct precond_list_struct | |
168 | { | |
169 | precond_e *head; | |
170 | precond_e **tail; | |
171 | }; | |
172 | ||
173 | ||
174 | /* The insn_templ represents the INSN_TEMPL instruction template. It | |
175 | is an opcode name with a list of operands. These are used for | |
176 | instruction patterns and replacement patterns. */ | |
177 | ||
178 | typedef struct insn_templ_struct insn_templ; | |
179 | struct insn_templ_struct | |
180 | { | |
181 | const char *opcode_name; | |
182 | opname_map operand_map; | |
183 | }; | |
184 | ||
185 | ||
186 | /* The insn_pattern represents an INSN_PATTERN instruction pattern. | |
187 | It is an instruction template with preconditions that specify when | |
188 | it actually matches a given instruction. */ | |
189 | ||
190 | typedef struct insn_pattern_struct insn_pattern; | |
191 | struct insn_pattern_struct | |
192 | { | |
193 | insn_templ t; | |
194 | precond_list preconds; | |
43cd72b9 | 195 | ReqOptionList *options; |
e0001a05 NC |
196 | }; |
197 | ||
198 | ||
199 | /* The "insn_repl" and associated element structure "insn_repl_e" | |
200 | instruction replacement list is a list of | |
201 | instructions/LITERALS/LABELS with constant operands or operands | |
202 | with names bound to the operand names in the associated pattern. */ | |
203 | ||
204 | typedef struct insn_repl_e_struct insn_repl_e; | |
205 | struct insn_repl_e_struct | |
206 | { | |
207 | insn_templ t; | |
208 | insn_repl_e *next; | |
209 | }; | |
210 | ||
211 | typedef struct insn_repl_struct insn_repl; | |
212 | struct insn_repl_struct | |
213 | { | |
214 | insn_repl_e *head; | |
215 | insn_repl_e **tail; | |
216 | }; | |
217 | ||
218 | ||
219 | /* The split_rec is a vector of allocated char * pointers. */ | |
220 | ||
221 | typedef struct split_rec_struct split_rec; | |
222 | struct split_rec_struct | |
223 | { | |
224 | char **vec; | |
43cd72b9 | 225 | int count; |
e0001a05 NC |
226 | }; |
227 | ||
228 | /* The "string_pattern_pair" is a set of pairs containing instruction | |
229 | patterns and replacement strings. */ | |
230 | ||
231 | typedef struct string_pattern_pair_struct string_pattern_pair; | |
232 | struct string_pattern_pair_struct | |
233 | { | |
234 | const char *pattern; | |
235 | const char *replacement; | |
236 | }; | |
237 | ||
238 | \f | |
239 | /* The widen_spec_list is a list of valid substitutions that generate | |
240 | wider representations. These are generally used to specify | |
241 | replacements for instructions whose immediates do not fit their | |
33b7f697 | 242 | encodings. A valid transition may require multiple steps of |
e0001a05 NC |
243 | one-to-one instruction replacements with a final multiple |
244 | instruction replacement. As an example, here are the transitions | |
245 | required to replace an 'addi.n' with an 'addi', 'addmi'. | |
246 | ||
247 | addi.n a4, 0x1010 | |
248 | => addi a4, 0x1010 | |
249 | => addmi a4, 0x1010 | |
250 | => addmi a4, 0x1000, addi a4, 0x10. */ | |
251 | ||
252 | static string_pattern_pair widen_spec_list[] = | |
253 | { | |
43cd72b9 BW |
254 | {"add.n %ar,%as,%at ? IsaUseDensityInstruction", "add %ar,%as,%at"}, |
255 | {"addi.n %ar,%as,%imm ? IsaUseDensityInstruction", "addi %ar,%as,%imm"}, | |
256 | {"beqz.n %as,%label ? IsaUseDensityInstruction", "beqz %as,%label"}, | |
257 | {"bnez.n %as,%label ? IsaUseDensityInstruction", "bnez %as,%label"}, | |
258 | {"l32i.n %at,%as,%imm ? IsaUseDensityInstruction", "l32i %at,%as,%imm"}, | |
259 | {"mov.n %at,%as ? IsaUseDensityInstruction", "or %at,%as,%as"}, | |
260 | {"movi.n %as,%imm ? IsaUseDensityInstruction", "movi %as,%imm"}, | |
261 | {"nop.n ? IsaUseDensityInstruction ? realnop", "nop"}, | |
262 | {"nop.n ? IsaUseDensityInstruction ? no-realnop", "or 1,1,1"}, | |
263 | {"ret.n %as ? IsaUseDensityInstruction", "ret %as"}, | |
264 | {"retw.n %as ? IsaUseDensityInstruction", "retw %as"}, | |
265 | {"s32i.n %at,%as,%imm ? IsaUseDensityInstruction", "s32i %at,%as,%imm"}, | |
e0001a05 NC |
266 | {"srli %at,%as,%imm", "extui %at,%as,%imm,F32MINUS(%imm)"}, |
267 | {"slli %ar,%as,0", "or %ar,%as,%as"}, | |
43cd72b9 BW |
268 | |
269 | /* Widening with literals or const16. */ | |
c138bc38 | 270 | {"movi %at,%imm ? IsaUseL32R ", |
61376837 | 271 | "LITERAL %imm; l32r %at,%LITERAL"}, |
c138bc38 | 272 | {"movi %at,%imm ? IsaUseConst16", |
43cd72b9 BW |
273 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm)"}, |
274 | ||
e0001a05 NC |
275 | {"addi %ar,%as,%imm", "addmi %ar,%as,%imm"}, |
276 | /* LOW8 is the low 8 bits of the Immed | |
277 | MID8S is the middle 8 bits of the Immed */ | |
278 | {"addmi %ar,%as,%imm", "addmi %ar,%as,HI24S(%imm); addi %ar,%ar,LOW8(%imm)"}, | |
43cd72b9 BW |
279 | |
280 | /* In the end convert to either an l32r or const16. */ | |
281 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseL32R", | |
61376837 | 282 | "LITERAL %imm; l32r %ar,%LITERAL; add %ar,%as,%ar"}, |
43cd72b9 BW |
283 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseConst16", |
284 | "const16 %ar,HI16U(%imm); const16 %ar,LOW16U(%imm); add %ar,%as,%ar"}, | |
e0001a05 NC |
285 | |
286 | /* Widening the load instructions with too-large immediates */ | |
43cd72b9 | 287 | {"l8ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
61376837 | 288 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l8ui %at,%at,0"}, |
43cd72b9 | 289 | {"l16si %at,%as,%imm | %at!=%as ? IsaUseL32R", |
61376837 | 290 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l16si %at,%at,0"}, |
43cd72b9 | 291 | {"l16ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
61376837 | 292 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l16ui %at,%at,0"}, |
43cd72b9 | 293 | {"l32i %at,%as,%imm | %at!=%as ? IsaUseL32R", |
61376837 | 294 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l32i %at,%at,0"}, |
43cd72b9 BW |
295 | |
296 | /* Widening load instructions with const16s. */ | |
297 | {"l8ui %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
298 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l8ui %at,%at,0"}, | |
299 | {"l16si %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
300 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16si %at,%at,0"}, | |
301 | {"l16ui %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
302 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16ui %at,%at,0"}, | |
303 | {"l32i %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
304 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l32i %at,%at,0"}, | |
305 | ||
43cd72b9 BW |
306 | /* This is only PART of the loop instruction. In addition, |
307 | hardcoded into its use is a modification of the final operand in | |
308 | the instruction in bytes 9 and 12. */ | |
309 | {"loop %as,%label | %as!=1 ? IsaUseLoops", | |
61376837 | 310 | "loop %as,%LABEL;" |
43cd72b9 BW |
311 | "rsr.lend %as;" /* LEND */ |
312 | "wsr.lbeg %as;" /* LBEG */ | |
e0001a05 NC |
313 | "addi %as, %as, 0;" /* lo8(%label-%LABEL1) */ |
314 | "addmi %as, %as, 0;" /* mid8(%label-%LABEL1) */ | |
43cd72b9 | 315 | "wsr.lend %as;" |
e0001a05 | 316 | "isync;" |
43cd72b9 | 317 | "rsr.lcount %as;" /* LCOUNT */ |
e0001a05 | 318 | "addi %as, %as, 1;" /* density -> addi.n %as, %as, 1 */ |
61376837 | 319 | "LABEL"}, |
43cd72b9 BW |
320 | {"loopgtz %as,%label | %as!=1 ? IsaUseLoops", |
321 | "beqz %as,%label;" | |
322 | "bltz %as,%label;" | |
61376837 | 323 | "loopgtz %as,%LABEL;" |
43cd72b9 BW |
324 | "rsr.lend %as;" /* LEND */ |
325 | "wsr.lbeg %as;" /* LBEG */ | |
e0001a05 NC |
326 | "addi %as, %as, 0;" /* lo8(%label-%LABEL1) */ |
327 | "addmi %as, %as, 0;" /* mid8(%label-%LABEL1) */ | |
43cd72b9 | 328 | "wsr.lend %as;" |
e0001a05 | 329 | "isync;" |
43cd72b9 | 330 | "rsr.lcount %as;" /* LCOUNT */ |
e0001a05 | 331 | "addi %as, %as, 1;" /* density -> addi.n %as, %as, 1 */ |
61376837 | 332 | "LABEL"}, |
43cd72b9 | 333 | {"loopnez %as,%label | %as!=1 ? IsaUseLoops", |
e0001a05 | 334 | "beqz %as,%label;" |
61376837 | 335 | "loopnez %as,%LABEL;" |
43cd72b9 BW |
336 | "rsr.lend %as;" /* LEND */ |
337 | "wsr.lbeg %as;" /* LBEG */ | |
e0001a05 NC |
338 | "addi %as, %as, 0;" /* lo8(%label-%LABEL1) */ |
339 | "addmi %as, %as, 0;" /* mid8(%label-%LABEL1) */ | |
43cd72b9 | 340 | "wsr.lend %as;" |
e0001a05 | 341 | "isync;" |
43cd72b9 | 342 | "rsr.lcount %as;" /* LCOUNT */ |
e0001a05 | 343 | "addi %as, %as, 1;" /* density -> addi.n %as, %as, 1 */ |
61376837 | 344 | "LABEL"}, |
e0001a05 | 345 | |
b2d179be BW |
346 | /* Relaxing to wide branches. Order is important here. With wide |
347 | branches, there is more than one correct relaxation for an | |
348 | out-of-range branch. Put the wide branch relaxations first in the | |
349 | table since they are more efficient than the branch-around | |
350 | relaxations. */ | |
351 | ||
1946c96e BW |
352 | {"beqz %as,%label ? IsaUseWideBranches", "WIDE.beqz %as,%label"}, |
353 | {"bnez %as,%label ? IsaUseWideBranches", "WIDE.bnez %as,%label"}, | |
354 | {"bgez %as,%label ? IsaUseWideBranches", "WIDE.bgez %as,%label"}, | |
355 | {"bltz %as,%label ? IsaUseWideBranches", "WIDE.bltz %as,%label"}, | |
356 | {"beqi %as,%imm,%label ? IsaUseWideBranches", "WIDE.beqi %as,%imm,%label"}, | |
357 | {"bnei %as,%imm,%label ? IsaUseWideBranches", "WIDE.bnei %as,%imm,%label"}, | |
358 | {"bgei %as,%imm,%label ? IsaUseWideBranches", "WIDE.bgei %as,%imm,%label"}, | |
359 | {"blti %as,%imm,%label ? IsaUseWideBranches", "WIDE.blti %as,%imm,%label"}, | |
360 | {"bgeui %as,%imm,%label ? IsaUseWideBranches", "WIDE.bgeui %as,%imm,%label"}, | |
361 | {"bltui %as,%imm,%label ? IsaUseWideBranches", "WIDE.bltui %as,%imm,%label"}, | |
362 | {"bbci %as,%imm,%label ? IsaUseWideBranches", "WIDE.bbci %as,%imm,%label"}, | |
363 | {"bbsi %as,%imm,%label ? IsaUseWideBranches", "WIDE.bbsi %as,%imm,%label"}, | |
364 | {"beq %as,%at,%label ? IsaUseWideBranches", "WIDE.beq %as,%at,%label"}, | |
365 | {"bne %as,%at,%label ? IsaUseWideBranches", "WIDE.bne %as,%at,%label"}, | |
366 | {"bge %as,%at,%label ? IsaUseWideBranches", "WIDE.bge %as,%at,%label"}, | |
367 | {"blt %as,%at,%label ? IsaUseWideBranches", "WIDE.blt %as,%at,%label"}, | |
368 | {"bgeu %as,%at,%label ? IsaUseWideBranches", "WIDE.bgeu %as,%at,%label"}, | |
369 | {"bltu %as,%at,%label ? IsaUseWideBranches", "WIDE.bltu %as,%at,%label"}, | |
370 | {"bany %as,%at,%label ? IsaUseWideBranches", "WIDE.bany %as,%at,%label"}, | |
371 | {"bnone %as,%at,%label ? IsaUseWideBranches", "WIDE.bnone %as,%at,%label"}, | |
372 | {"ball %as,%at,%label ? IsaUseWideBranches", "WIDE.ball %as,%at,%label"}, | |
373 | {"bnall %as,%at,%label ? IsaUseWideBranches", "WIDE.bnall %as,%at,%label"}, | |
374 | {"bbc %as,%at,%label ? IsaUseWideBranches", "WIDE.bbc %as,%at,%label"}, | |
375 | {"bbs %as,%at,%label ? IsaUseWideBranches", "WIDE.bbs %as,%at,%label"}, | |
b2d179be BW |
376 | |
377 | /* Widening branch comparisons eq/ne to zero. Prefer relaxing to narrow | |
378 | branches if the density option is available. */ | |
61376837 BW |
379 | {"beqz %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%LABEL;j %label;LABEL"}, |
380 | {"bnez %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%LABEL;j %label;LABEL"}, | |
381 | {"beqz %as,%label", "bnez %as,%LABEL;j %label;LABEL"}, | |
382 | {"bnez %as,%label", "beqz %as,%LABEL;j %label;LABEL"}, | |
b2d179be BW |
383 | |
384 | /* Widening expect-taken branches. */ | |
61376837 BW |
385 | {"beqzt %as,%label ? IsaUsePredictedBranches", "bnez %as,%LABEL;j %label;LABEL"}, |
386 | {"bnezt %as,%label ? IsaUsePredictedBranches", "beqz %as,%LABEL;j %label;LABEL"}, | |
387 | {"beqt %as,%at,%label ? IsaUsePredictedBranches", "bne %as,%at,%LABEL;j %label;LABEL"}, | |
388 | {"bnet %as,%at,%label ? IsaUsePredictedBranches", "beq %as,%at,%LABEL;j %label;LABEL"}, | |
b2d179be BW |
389 | |
390 | /* Widening branches from the Xtensa boolean option. */ | |
61376837 BW |
391 | {"bt %bs,%label ? IsaUseBooleans", "bf %bs,%LABEL;j %label;LABEL"}, |
392 | {"bf %bs,%label ? IsaUseBooleans", "bt %bs,%LABEL;j %label;LABEL"}, | |
e0001a05 | 393 | |
b2d179be | 394 | /* Other branch-around-jump widenings. */ |
61376837 BW |
395 | {"bgez %as,%label", "bltz %as,%LABEL;j %label;LABEL"}, |
396 | {"bltz %as,%label", "bgez %as,%LABEL;j %label;LABEL"}, | |
397 | {"beqi %as,%imm,%label", "bnei %as,%imm,%LABEL;j %label;LABEL"}, | |
398 | {"bnei %as,%imm,%label", "beqi %as,%imm,%LABEL;j %label;LABEL"}, | |
399 | {"bgei %as,%imm,%label", "blti %as,%imm,%LABEL;j %label;LABEL"}, | |
400 | {"blti %as,%imm,%label", "bgei %as,%imm,%LABEL;j %label;LABEL"}, | |
401 | {"bgeui %as,%imm,%label", "bltui %as,%imm,%LABEL;j %label;LABEL"}, | |
402 | {"bltui %as,%imm,%label", "bgeui %as,%imm,%LABEL;j %label;LABEL"}, | |
403 | {"bbci %as,%imm,%label", "bbsi %as,%imm,%LABEL;j %label;LABEL"}, | |
404 | {"bbsi %as,%imm,%label", "bbci %as,%imm,%LABEL;j %label;LABEL"}, | |
405 | {"beq %as,%at,%label", "bne %as,%at,%LABEL;j %label;LABEL"}, | |
406 | {"bne %as,%at,%label", "beq %as,%at,%LABEL;j %label;LABEL"}, | |
407 | {"bge %as,%at,%label", "blt %as,%at,%LABEL;j %label;LABEL"}, | |
408 | {"blt %as,%at,%label", "bge %as,%at,%LABEL;j %label;LABEL"}, | |
409 | {"bgeu %as,%at,%label", "bltu %as,%at,%LABEL;j %label;LABEL"}, | |
410 | {"bltu %as,%at,%label", "bgeu %as,%at,%LABEL;j %label;LABEL"}, | |
411 | {"bany %as,%at,%label", "bnone %as,%at,%LABEL;j %label;LABEL"}, | |
412 | {"bnone %as,%at,%label", "bany %as,%at,%LABEL;j %label;LABEL"}, | |
413 | {"ball %as,%at,%label", "bnall %as,%at,%LABEL;j %label;LABEL"}, | |
414 | {"bnall %as,%at,%label", "ball %as,%at,%LABEL;j %label;LABEL"}, | |
415 | {"bbc %as,%at,%label", "bbs %as,%at,%LABEL;j %label;LABEL"}, | |
416 | {"bbs %as,%at,%label", "bbc %as,%at,%LABEL;j %label;LABEL"}, | |
43cd72b9 BW |
417 | |
418 | /* Expanding calls with literals. */ | |
419 | {"call0 %label,%ar0 ? IsaUseL32R", | |
61376837 | 420 | "LITERAL %label; l32r a0,%LITERAL; callx0 a0,%ar0"}, |
43cd72b9 | 421 | {"call4 %label,%ar4 ? IsaUseL32R", |
61376837 | 422 | "LITERAL %label; l32r a4,%LITERAL; callx4 a4,%ar4"}, |
43cd72b9 | 423 | {"call8 %label,%ar8 ? IsaUseL32R", |
61376837 | 424 | "LITERAL %label; l32r a8,%LITERAL; callx8 a8,%ar8"}, |
43cd72b9 | 425 | {"call12 %label,%ar12 ? IsaUseL32R", |
61376837 | 426 | "LITERAL %label; l32r a12,%LITERAL; callx12 a12,%ar12"}, |
43cd72b9 BW |
427 | |
428 | /* Expanding calls with const16. */ | |
429 | {"call0 %label,%ar0 ? IsaUseConst16", | |
430 | "const16 a0,HI16U(%label); const16 a0,LOW16U(%label); callx0 a0,%ar0"}, | |
431 | {"call4 %label,%ar4 ? IsaUseConst16", | |
432 | "const16 a4,HI16U(%label); const16 a4,LOW16U(%label); callx4 a4,%ar4"}, | |
433 | {"call8 %label,%ar8 ? IsaUseConst16", | |
434 | "const16 a8,HI16U(%label); const16 a8,LOW16U(%label); callx8 a8,%ar8"}, | |
435 | {"call12 %label,%ar12 ? IsaUseConst16", | |
436 | "const16 a12,HI16U(%label); const16 a12,LOW16U(%label); callx12 a12,%ar12"} | |
e0001a05 NC |
437 | }; |
438 | ||
439 | #define WIDEN_COUNT (sizeof (widen_spec_list) / sizeof (string_pattern_pair)) | |
440 | ||
441 | ||
442 | /* The simplify_spec_list specifies simplifying transformations that | |
443 | will reduce the instruction width or otherwise simplify an | |
444 | instruction. These are usually applied before relaxation in the | |
445 | assembler. It is always legal to simplify. Even for "addi as, 0", | |
446 | the "addi.n as, 0" will eventually be widened back to an "addi 0" | |
447 | after the widening table is applied. Note: The usage of this table | |
448 | has changed somewhat so that it is entirely specific to "narrowing" | |
449 | instructions to use the density option. This table is not used at | |
450 | all when the density option is not available. */ | |
451 | ||
452 | string_pattern_pair simplify_spec_list[] = | |
453 | { | |
43cd72b9 BW |
454 | {"add %ar,%as,%at ? IsaUseDensityInstruction", "add.n %ar,%as,%at"}, |
455 | {"addi.n %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, | |
456 | {"addi %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, | |
457 | {"addi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, | |
458 | {"addmi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, | |
459 | {"beqz %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%label"}, | |
460 | {"bnez %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%label"}, | |
461 | {"l32i %at,%as,%imm ? IsaUseDensityInstruction", "l32i.n %at,%as,%imm"}, | |
462 | {"movi %as,%imm ? IsaUseDensityInstruction", "movi.n %as,%imm"}, | |
463 | {"nop ? realnop ? IsaUseDensityInstruction", "nop.n"}, | |
464 | {"or %ar,%as,%at | %ar==%as | %as==%at ? IsaUseDensityInstruction", "nop.n"}, | |
465 | {"or %ar,%as,%at | %ar!=%as | %as==%at ? IsaUseDensityInstruction", "mov.n %ar,%as"}, | |
466 | {"ret %as ? IsaUseDensityInstruction", "ret.n %as"}, | |
467 | {"retw %as ? IsaUseDensityInstruction", "retw.n %as"}, | |
468 | {"s32i %at,%as,%imm ? IsaUseDensityInstruction", "s32i.n %at,%as,%imm"}, | |
469 | {"slli %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"} | |
e0001a05 NC |
470 | }; |
471 | ||
472 | #define SIMPLIFY_COUNT \ | |
473 | (sizeof (simplify_spec_list) / sizeof (string_pattern_pair)) | |
474 | ||
475 | \f | |
e0001a05 NC |
476 | /* Externally visible functions. */ |
477 | ||
7fa3d080 BW |
478 | extern bfd_boolean xg_has_userdef_op_fn (OpType); |
479 | extern long xg_apply_userdef_op_fn (OpType, long); | |
e0001a05 | 480 | |
7fa3d080 BW |
481 | |
482 | static void | |
483 | append_transition (TransitionTable *tt, | |
484 | xtensa_opcode opcode, | |
485 | TransitionRule *t, | |
486 | transition_cmp_fn cmp) | |
e0001a05 NC |
487 | { |
488 | TransitionList *tl = (TransitionList *) xmalloc (sizeof (TransitionList)); | |
489 | TransitionList *prev; | |
43cd72b9 | 490 | TransitionList **t_p; |
e0001a05 NC |
491 | assert (tt != NULL); |
492 | assert (opcode < tt->num_opcodes); | |
493 | ||
494 | prev = tt->table[opcode]; | |
495 | tl->rule = t; | |
496 | tl->next = NULL; | |
497 | if (prev == NULL) | |
498 | { | |
499 | tt->table[opcode] = tl; | |
500 | return; | |
501 | } | |
43cd72b9 BW |
502 | |
503 | for (t_p = &tt->table[opcode]; (*t_p) != NULL; t_p = &(*t_p)->next) | |
e0001a05 | 504 | { |
43cd72b9 BW |
505 | if (cmp && cmp (t, (*t_p)->rule) < 0) |
506 | { | |
507 | /* Insert it here. */ | |
508 | tl->next = *t_p; | |
509 | *t_p = tl; | |
510 | return; | |
511 | } | |
e0001a05 | 512 | } |
43cd72b9 | 513 | (*t_p) = tl; |
e0001a05 NC |
514 | } |
515 | ||
516 | ||
7fa3d080 BW |
517 | static void |
518 | append_condition (TransitionRule *tr, Precondition *cond) | |
e0001a05 NC |
519 | { |
520 | PreconditionList *pl = | |
521 | (PreconditionList *) xmalloc (sizeof (PreconditionList)); | |
522 | PreconditionList *prev = tr->conditions; | |
523 | PreconditionList *nxt; | |
524 | ||
525 | pl->precond = cond; | |
526 | pl->next = NULL; | |
527 | if (prev == NULL) | |
528 | { | |
529 | tr->conditions = pl; | |
530 | return; | |
531 | } | |
532 | nxt = prev->next; | |
533 | while (nxt != NULL) | |
534 | { | |
535 | prev = nxt; | |
536 | nxt = nxt->next; | |
537 | } | |
538 | prev->next = pl; | |
539 | } | |
540 | ||
541 | ||
7fa3d080 BW |
542 | static void |
543 | append_value_condition (TransitionRule *tr, | |
544 | CmpOp cmp, | |
545 | unsigned op1, | |
546 | unsigned op2) | |
e0001a05 NC |
547 | { |
548 | Precondition *cond = (Precondition *) xmalloc (sizeof (Precondition)); | |
549 | ||
550 | cond->cmp = cmp; | |
551 | cond->op_num = op1; | |
552 | cond->typ = OP_OPERAND; | |
553 | cond->op_data = op2; | |
554 | append_condition (tr, cond); | |
555 | } | |
556 | ||
557 | ||
7fa3d080 BW |
558 | static void |
559 | append_constant_value_condition (TransitionRule *tr, | |
560 | CmpOp cmp, | |
561 | unsigned op1, | |
562 | unsigned cnst) | |
e0001a05 NC |
563 | { |
564 | Precondition *cond = (Precondition *) xmalloc (sizeof (Precondition)); | |
565 | ||
566 | cond->cmp = cmp; | |
567 | cond->op_num = op1; | |
568 | cond->typ = OP_CONSTANT; | |
569 | cond->op_data = cnst; | |
570 | append_condition (tr, cond); | |
571 | } | |
572 | ||
573 | ||
7fa3d080 BW |
574 | static void |
575 | append_build_insn (TransitionRule *tr, BuildInstr *bi) | |
e0001a05 NC |
576 | { |
577 | BuildInstr *prev = tr->to_instr; | |
578 | BuildInstr *nxt; | |
579 | ||
580 | bi->next = NULL; | |
581 | if (prev == NULL) | |
582 | { | |
583 | tr->to_instr = bi; | |
584 | return; | |
585 | } | |
586 | nxt = prev->next; | |
587 | while (nxt != 0) | |
588 | { | |
589 | prev = nxt; | |
590 | nxt = prev->next; | |
591 | } | |
592 | prev->next = bi; | |
593 | } | |
594 | ||
595 | ||
7fa3d080 BW |
596 | static void |
597 | append_op (BuildInstr *bi, BuildOp *b_op) | |
e0001a05 NC |
598 | { |
599 | BuildOp *prev = bi->ops; | |
600 | BuildOp *nxt; | |
601 | ||
602 | if (prev == NULL) | |
603 | { | |
604 | bi->ops = b_op; | |
605 | return; | |
606 | } | |
607 | nxt = prev->next; | |
608 | while (nxt != NULL) | |
609 | { | |
610 | prev = nxt; | |
611 | nxt = nxt->next; | |
612 | } | |
613 | prev->next = b_op; | |
614 | } | |
615 | ||
616 | ||
7fa3d080 | 617 | static void |
61376837 | 618 | append_literal_op (BuildInstr *bi, unsigned op1) |
e0001a05 NC |
619 | { |
620 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
621 | ||
622 | b_op->op_num = op1; | |
623 | b_op->typ = OP_LITERAL; | |
61376837 | 624 | b_op->op_data = 0; |
e0001a05 NC |
625 | b_op->next = NULL; |
626 | append_op (bi, b_op); | |
627 | } | |
628 | ||
629 | ||
7fa3d080 | 630 | static void |
61376837 | 631 | append_label_op (BuildInstr *bi, unsigned op1) |
e0001a05 NC |
632 | { |
633 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
634 | ||
635 | b_op->op_num = op1; | |
636 | b_op->typ = OP_LABEL; | |
61376837 | 637 | b_op->op_data = 0; |
e0001a05 NC |
638 | b_op->next = NULL; |
639 | append_op (bi, b_op); | |
640 | } | |
641 | ||
642 | ||
7fa3d080 BW |
643 | static void |
644 | append_constant_op (BuildInstr *bi, unsigned op1, unsigned cnst) | |
e0001a05 NC |
645 | { |
646 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
647 | ||
648 | b_op->op_num = op1; | |
649 | b_op->typ = OP_CONSTANT; | |
650 | b_op->op_data = cnst; | |
651 | b_op->next = NULL; | |
652 | append_op (bi, b_op); | |
653 | } | |
654 | ||
655 | ||
7fa3d080 BW |
656 | static void |
657 | append_field_op (BuildInstr *bi, unsigned op1, unsigned src_op) | |
e0001a05 NC |
658 | { |
659 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
660 | ||
661 | b_op->op_num = op1; | |
662 | b_op->typ = OP_OPERAND; | |
663 | b_op->op_data = src_op; | |
664 | b_op->next = NULL; | |
665 | append_op (bi, b_op); | |
666 | } | |
667 | ||
668 | ||
669 | /* These could be generated but are not currently. */ | |
670 | ||
7fa3d080 BW |
671 | static void |
672 | append_user_fn_field_op (BuildInstr *bi, | |
673 | unsigned op1, | |
674 | OpType typ, | |
675 | unsigned src_op) | |
e0001a05 NC |
676 | { |
677 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
678 | ||
679 | b_op->op_num = op1; | |
680 | b_op->typ = typ; | |
681 | b_op->op_data = src_op; | |
682 | b_op->next = NULL; | |
683 | append_op (bi, b_op); | |
684 | } | |
685 | ||
686 | ||
687 | /* These operand functions are the semantics of user-defined | |
688 | operand functions. */ | |
689 | ||
7fa3d080 BW |
690 | static long |
691 | operand_function_HI24S (long a) | |
e0001a05 NC |
692 | { |
693 | if (a & 0x80) | |
694 | return (a & (~0xff)) + 0x100; | |
695 | else | |
696 | return (a & (~0xff)); | |
697 | } | |
698 | ||
699 | ||
7fa3d080 BW |
700 | static long |
701 | operand_function_F32MINUS (long a) | |
e0001a05 NC |
702 | { |
703 | return (32 - a); | |
704 | } | |
705 | ||
706 | ||
7fa3d080 BW |
707 | static long |
708 | operand_function_LOW8 (long a) | |
e0001a05 NC |
709 | { |
710 | if (a & 0x80) | |
711 | return (a & 0xff) | ~0xff; | |
712 | else | |
713 | return (a & 0xff); | |
714 | } | |
715 | ||
716 | ||
7fa3d080 BW |
717 | static long |
718 | operand_function_LOW16U (long a) | |
43cd72b9 BW |
719 | { |
720 | return (a & 0xffff); | |
721 | } | |
722 | ||
723 | ||
7fa3d080 BW |
724 | static long |
725 | operand_function_HI16U (long a) | |
43cd72b9 BW |
726 | { |
727 | unsigned long b = a & 0xffff0000; | |
728 | return (long) (b >> 16); | |
729 | } | |
730 | ||
731 | ||
e0001a05 | 732 | bfd_boolean |
7fa3d080 | 733 | xg_has_userdef_op_fn (OpType op) |
e0001a05 NC |
734 | { |
735 | switch (op) | |
736 | { | |
737 | case OP_OPERAND_F32MINUS: | |
738 | case OP_OPERAND_LOW8: | |
739 | case OP_OPERAND_HI24S: | |
43cd72b9 BW |
740 | case OP_OPERAND_LOW16U: |
741 | case OP_OPERAND_HI16U: | |
e0001a05 NC |
742 | return TRUE; |
743 | default: | |
744 | break; | |
745 | } | |
746 | return FALSE; | |
747 | } | |
748 | ||
749 | ||
750 | long | |
7fa3d080 | 751 | xg_apply_userdef_op_fn (OpType op, long a) |
e0001a05 NC |
752 | { |
753 | switch (op) | |
754 | { | |
755 | case OP_OPERAND_F32MINUS: | |
756 | return operand_function_F32MINUS (a); | |
757 | case OP_OPERAND_LOW8: | |
758 | return operand_function_LOW8 (a); | |
759 | case OP_OPERAND_HI24S: | |
760 | return operand_function_HI24S (a); | |
43cd72b9 BW |
761 | case OP_OPERAND_LOW16U: |
762 | return operand_function_LOW16U (a); | |
763 | case OP_OPERAND_HI16U: | |
764 | return operand_function_HI16U (a); | |
e0001a05 NC |
765 | default: |
766 | break; | |
767 | } | |
768 | return FALSE; | |
769 | } | |
770 | ||
771 | ||
772 | /* Generate a transition table. */ | |
773 | ||
7fa3d080 BW |
774 | static const char * |
775 | enter_opname_n (const char *name, int len) | |
e0001a05 NC |
776 | { |
777 | opname_e *op; | |
778 | ||
779 | for (op = local_opnames; op != NULL; op = op->next) | |
780 | { | |
43cd72b9 BW |
781 | if (strlen (op->opname) == (unsigned) len |
782 | && strncmp (op->opname, name, len) == 0) | |
e0001a05 NC |
783 | return op->opname; |
784 | } | |
785 | op = (opname_e *) xmalloc (sizeof (opname_e)); | |
786 | op->opname = (char *) xmalloc (len + 1); | |
787 | strncpy (op->opname, name, len); | |
788 | op->opname[len] = '\0'; | |
789 | return op->opname; | |
790 | } | |
791 | ||
792 | ||
793 | static const char * | |
7fa3d080 | 794 | enter_opname (const char *name) |
e0001a05 NC |
795 | { |
796 | opname_e *op; | |
797 | ||
798 | for (op = local_opnames; op != NULL; op = op->next) | |
799 | { | |
800 | if (strcmp (op->opname, name) == 0) | |
801 | return op->opname; | |
802 | } | |
803 | op = (opname_e *) xmalloc (sizeof (opname_e)); | |
43cd72b9 | 804 | op->opname = xstrdup (name); |
e0001a05 NC |
805 | return op->opname; |
806 | } | |
807 | ||
808 | ||
7fa3d080 BW |
809 | static void |
810 | init_opname_map (opname_map *m) | |
e0001a05 NC |
811 | { |
812 | m->head = NULL; | |
813 | m->tail = &m->head; | |
814 | } | |
815 | ||
816 | ||
7fa3d080 BW |
817 | static void |
818 | clear_opname_map (opname_map *m) | |
e0001a05 NC |
819 | { |
820 | opname_map_e *e; | |
821 | ||
822 | while (m->head != NULL) | |
823 | { | |
824 | e = m->head; | |
825 | m->head = e->next; | |
826 | free (e); | |
827 | } | |
828 | m->tail = &m->head; | |
829 | } | |
830 | ||
831 | ||
832 | static bfd_boolean | |
7fa3d080 | 833 | same_operand_name (const opname_map_e *m1, const opname_map_e *m2) |
e0001a05 NC |
834 | { |
835 | if (m1->operand_name == NULL || m1->operand_name == NULL) | |
836 | return FALSE; | |
837 | return (m1->operand_name == m2->operand_name); | |
838 | } | |
839 | ||
840 | ||
7fa3d080 BW |
841 | static opname_map_e * |
842 | get_opmatch (opname_map *map, const char *operand_name) | |
e0001a05 NC |
843 | { |
844 | opname_map_e *m; | |
845 | ||
846 | for (m = map->head; m != NULL; m = m->next) | |
847 | { | |
848 | if (strcmp (m->operand_name, operand_name) == 0) | |
849 | return m; | |
850 | } | |
851 | return NULL; | |
852 | } | |
853 | ||
854 | ||
7fa3d080 BW |
855 | static bfd_boolean |
856 | op_is_constant (const opname_map_e *m1) | |
e0001a05 NC |
857 | { |
858 | return (m1->operand_name == NULL); | |
859 | } | |
860 | ||
861 | ||
862 | static unsigned | |
7fa3d080 | 863 | op_get_constant (const opname_map_e *m1) |
e0001a05 NC |
864 | { |
865 | assert (m1->operand_name == NULL); | |
866 | return m1->constant_value; | |
867 | } | |
868 | ||
869 | ||
7fa3d080 BW |
870 | static void |
871 | init_precond_list (precond_list *l) | |
e0001a05 NC |
872 | { |
873 | l->head = NULL; | |
874 | l->tail = &l->head; | |
875 | } | |
876 | ||
877 | ||
7fa3d080 BW |
878 | static void |
879 | clear_precond_list (precond_list *l) | |
e0001a05 NC |
880 | { |
881 | precond_e *e; | |
882 | ||
883 | while (l->head != NULL) | |
884 | { | |
885 | e = l->head; | |
886 | l->head = e->next; | |
887 | free (e); | |
888 | } | |
889 | l->tail = &l->head; | |
890 | } | |
891 | ||
892 | ||
7fa3d080 BW |
893 | static void |
894 | init_insn_templ (insn_templ *t) | |
e0001a05 NC |
895 | { |
896 | t->opcode_name = NULL; | |
897 | init_opname_map (&t->operand_map); | |
898 | } | |
899 | ||
900 | ||
7fa3d080 BW |
901 | static void |
902 | clear_insn_templ (insn_templ *t) | |
e0001a05 NC |
903 | { |
904 | clear_opname_map (&t->operand_map); | |
905 | } | |
906 | ||
907 | ||
7fa3d080 BW |
908 | static void |
909 | init_insn_pattern (insn_pattern *p) | |
e0001a05 NC |
910 | { |
911 | init_insn_templ (&p->t); | |
912 | init_precond_list (&p->preconds); | |
43cd72b9 | 913 | p->options = NULL; |
e0001a05 NC |
914 | } |
915 | ||
916 | ||
7fa3d080 BW |
917 | static void |
918 | clear_insn_pattern (insn_pattern *p) | |
e0001a05 NC |
919 | { |
920 | clear_insn_templ (&p->t); | |
921 | clear_precond_list (&p->preconds); | |
922 | } | |
923 | ||
924 | ||
7fa3d080 BW |
925 | static void |
926 | init_insn_repl (insn_repl *r) | |
e0001a05 NC |
927 | { |
928 | r->head = NULL; | |
929 | r->tail = &r->head; | |
930 | } | |
931 | ||
932 | ||
7fa3d080 BW |
933 | static void |
934 | clear_insn_repl (insn_repl *r) | |
e0001a05 NC |
935 | { |
936 | insn_repl_e *e; | |
937 | ||
938 | while (r->head != NULL) | |
939 | { | |
940 | e = r->head; | |
941 | r->head = e->next; | |
942 | clear_insn_templ (&e->t); | |
943 | } | |
944 | r->tail = &r->head; | |
945 | } | |
946 | ||
947 | ||
43cd72b9 | 948 | static int |
7fa3d080 | 949 | insn_templ_operand_count (const insn_templ *t) |
e0001a05 | 950 | { |
43cd72b9 | 951 | int i = 0; |
e0001a05 NC |
952 | const opname_map_e *op; |
953 | ||
43cd72b9 | 954 | for (op = t->operand_map.head; op != NULL; op = op->next, i++) |
e0001a05 NC |
955 | ; |
956 | return i; | |
957 | } | |
958 | ||
959 | ||
960 | /* Convert a string to a number. E.G.: parse_constant("10", &num) */ | |
961 | ||
7fa3d080 BW |
962 | static bfd_boolean |
963 | parse_constant (const char *in, unsigned *val_p) | |
e0001a05 NC |
964 | { |
965 | unsigned val = 0; | |
966 | const char *p; | |
967 | ||
968 | if (in == NULL) | |
969 | return FALSE; | |
970 | p = in; | |
971 | ||
972 | while (*p != '\0') | |
973 | { | |
974 | if (*p >= '0' && *p <= '9') | |
975 | val = val * 10 + (*p - '0'); | |
976 | else | |
977 | return FALSE; | |
978 | ++p; | |
979 | } | |
980 | *val_p = val; | |
981 | return TRUE; | |
982 | } | |
983 | ||
984 | ||
e0001a05 | 985 | static bfd_boolean |
7fa3d080 BW |
986 | parse_special_fn (const char *name, |
987 | const char **fn_name_p, | |
988 | const char **arg_name_p) | |
e0001a05 NC |
989 | { |
990 | char *p_start; | |
991 | const char *p_end; | |
992 | ||
993 | p_start = strchr (name, '('); | |
994 | if (p_start == NULL) | |
995 | return FALSE; | |
996 | ||
997 | p_end = strchr (p_start, ')'); | |
998 | ||
999 | if (p_end == NULL) | |
1000 | return FALSE; | |
1001 | ||
1002 | if (p_end[1] != '\0') | |
1003 | return FALSE; | |
1004 | ||
1005 | *fn_name_p = enter_opname_n (name, p_start - name); | |
1006 | *arg_name_p = enter_opname_n (p_start + 1, p_end - p_start - 1); | |
1007 | return TRUE; | |
1008 | } | |
1009 | ||
1010 | ||
7fa3d080 BW |
1011 | static const char * |
1012 | skip_white (const char *p) | |
e0001a05 NC |
1013 | { |
1014 | if (p == NULL) | |
1015 | return p; | |
1016 | while (*p == ' ') | |
1017 | ++p; | |
1018 | return p; | |
1019 | } | |
1020 | ||
1021 | ||
7fa3d080 BW |
1022 | static void |
1023 | trim_whitespace (char *in) | |
e0001a05 NC |
1024 | { |
1025 | char *last_white = NULL; | |
1026 | char *p = in; | |
1027 | ||
1028 | while (p && *p != '\0') | |
1029 | { | |
1030 | while (*p == ' ') | |
1031 | { | |
1032 | if (last_white == NULL) | |
1033 | last_white = p; | |
1034 | p++; | |
1035 | } | |
1036 | if (*p != '\0') | |
1037 | { | |
1038 | last_white = NULL; | |
1039 | p++; | |
1040 | } | |
1041 | } | |
1042 | if (last_white) | |
1043 | *last_white = '\0'; | |
1044 | } | |
1045 | ||
1046 | ||
1047 | /* Split a string into component strings where "c" is the | |
1048 | delimiter. Place the result in the split_rec. */ | |
1049 | ||
7fa3d080 BW |
1050 | static void |
1051 | split_string (split_rec *rec, | |
1052 | const char *in, | |
1053 | char c, | |
1054 | bfd_boolean elide_whitespace) | |
e0001a05 | 1055 | { |
43cd72b9 BW |
1056 | int cnt = 0; |
1057 | int i; | |
e0001a05 NC |
1058 | const char *p = in; |
1059 | ||
1060 | while (p != NULL && *p != '\0') | |
1061 | { | |
1062 | cnt++; | |
1063 | p = strchr (p, c); | |
1064 | if (p) | |
1065 | p++; | |
1066 | } | |
1067 | rec->count = cnt; | |
1068 | rec->vec = NULL; | |
1069 | ||
1070 | if (rec->count == 0) | |
1071 | return; | |
1072 | ||
1073 | rec->vec = (char **) xmalloc (sizeof (char *) * cnt); | |
1074 | for (i = 0; i < cnt; i++) | |
1075 | rec->vec[i] = 0; | |
1076 | ||
1077 | p = in; | |
1078 | for (i = 0; i < cnt; i++) | |
1079 | { | |
1080 | const char *q; | |
43cd72b9 | 1081 | int len; |
e0001a05 NC |
1082 | |
1083 | q = p; | |
1084 | if (elide_whitespace) | |
1085 | q = skip_white (q); | |
1086 | ||
1087 | p = strchr (q, c); | |
1088 | if (p == NULL) | |
43cd72b9 | 1089 | rec->vec[i] = xstrdup (q); |
e0001a05 NC |
1090 | else |
1091 | { | |
1092 | len = p - q; | |
1093 | rec->vec[i] = (char *) xmalloc (sizeof (char) * (len + 1)); | |
1094 | strncpy (rec->vec[i], q, len); | |
1095 | rec->vec[i][len] = '\0'; | |
1096 | p++; | |
1097 | } | |
1098 | ||
1099 | if (elide_whitespace) | |
1100 | trim_whitespace (rec->vec[i]); | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | ||
7fa3d080 BW |
1105 | static void |
1106 | clear_split_rec (split_rec *rec) | |
e0001a05 | 1107 | { |
43cd72b9 | 1108 | int i; |
e0001a05 | 1109 | |
43cd72b9 | 1110 | for (i = 0; i < rec->count; i++) |
e0001a05 NC |
1111 | free (rec->vec[i]); |
1112 | ||
1113 | if (rec->count > 0) | |
1114 | free (rec->vec); | |
1115 | } | |
1116 | ||
1117 | ||
43cd72b9 BW |
1118 | /* Initialize a split record. The split record must be initialized |
1119 | before split_string is called. */ | |
1120 | ||
7fa3d080 BW |
1121 | static void |
1122 | init_split_rec (split_rec *rec) | |
e0001a05 NC |
1123 | { |
1124 | rec->vec = NULL; | |
1125 | rec->count = 0; | |
1126 | } | |
1127 | ||
1128 | ||
1129 | /* Parse an instruction template like "insn op1, op2, op3". */ | |
1130 | ||
7fa3d080 BW |
1131 | static bfd_boolean |
1132 | parse_insn_templ (const char *s, insn_templ *t) | |
e0001a05 NC |
1133 | { |
1134 | const char *p = s; | |
43cd72b9 | 1135 | int insn_name_len; |
e0001a05 | 1136 | split_rec oprec; |
43cd72b9 BW |
1137 | int i; |
1138 | ||
1139 | /* First find the first whitespace. */ | |
e0001a05 NC |
1140 | |
1141 | init_split_rec (&oprec); | |
1142 | ||
1143 | p = skip_white (p); | |
1144 | insn_name_len = strcspn (s, " "); | |
1145 | if (insn_name_len == 0) | |
1146 | return FALSE; | |
1147 | ||
1148 | init_insn_templ (t); | |
1149 | t->opcode_name = enter_opname_n (p, insn_name_len); | |
1150 | ||
1151 | p = p + insn_name_len; | |
1152 | ||
1153 | /* Split by ',' and skip beginning and trailing whitespace. */ | |
1154 | split_string (&oprec, p, ',', TRUE); | |
1155 | ||
1156 | for (i = 0; i < oprec.count; i++) | |
1157 | { | |
1158 | const char *opname = oprec.vec[i]; | |
1159 | opname_map_e *e = (opname_map_e *) xmalloc (sizeof (opname_map_e)); | |
1160 | e->next = NULL; | |
1161 | e->operand_name = NULL; | |
1162 | e->constant_value = 0; | |
1163 | e->operand_num = i; | |
1164 | ||
1165 | /* If it begins with a number, assume that it is a number. */ | |
1166 | if (opname && opname[0] >= '0' && opname[0] <= '9') | |
1167 | { | |
1168 | unsigned val; | |
1169 | ||
1170 | if (parse_constant (opname, &val)) | |
1171 | e->constant_value = val; | |
1172 | else | |
1173 | { | |
1174 | free (e); | |
1175 | clear_split_rec (&oprec); | |
1176 | clear_insn_templ (t); | |
1177 | return FALSE; | |
1178 | } | |
1179 | } | |
1180 | else | |
1181 | e->operand_name = enter_opname (oprec.vec[i]); | |
1182 | ||
1183 | *t->operand_map.tail = e; | |
1184 | t->operand_map.tail = &e->next; | |
1185 | } | |
1186 | clear_split_rec (&oprec); | |
1187 | return TRUE; | |
1188 | } | |
1189 | ||
1190 | ||
7fa3d080 BW |
1191 | static bfd_boolean |
1192 | parse_precond (const char *s, precond_e *precond) | |
e0001a05 NC |
1193 | { |
1194 | /* All preconditions are currently of the form: | |
1195 | a == b or a != b or a == k (where k is a constant). | |
1196 | Later we may use some special functions like DENSITY == 1 | |
1197 | to identify when density is available. */ | |
1198 | ||
1199 | const char *p = s; | |
43cd72b9 | 1200 | int len; |
e0001a05 NC |
1201 | precond->opname1 = NULL; |
1202 | precond->opval1 = 0; | |
1203 | precond->cmpop = OP_EQUAL; | |
1204 | precond->opname2 = NULL; | |
1205 | precond->opval2 = 0; | |
1206 | precond->next = NULL; | |
1207 | ||
1208 | p = skip_white (p); | |
1209 | ||
1210 | len = strcspn (p, " !="); | |
1211 | ||
1212 | if (len == 0) | |
1213 | return FALSE; | |
1214 | ||
1215 | precond->opname1 = enter_opname_n (p, len); | |
1216 | p = p + len; | |
1217 | p = skip_white (p); | |
1218 | ||
1219 | /* Check for "==" and "!=". */ | |
1220 | if (strncmp (p, "==", 2) == 0) | |
1221 | precond->cmpop = OP_EQUAL; | |
1222 | else if (strncmp (p, "!=", 2) == 0) | |
1223 | precond->cmpop = OP_NOTEQUAL; | |
1224 | else | |
1225 | return FALSE; | |
1226 | ||
1227 | p = p + 2; | |
1228 | p = skip_white (p); | |
1229 | ||
1230 | /* No trailing whitespace from earlier parsing. */ | |
1231 | if (p[0] >= '0' && p[0] <= '9') | |
1232 | { | |
1233 | unsigned val; | |
1234 | if (parse_constant (p, &val)) | |
1235 | precond->opval2 = val; | |
1236 | else | |
1237 | return FALSE; | |
1238 | } | |
1239 | else | |
1240 | precond->opname2 = enter_opname (p); | |
1241 | return TRUE; | |
1242 | } | |
1243 | ||
1244 | ||
7fa3d080 BW |
1245 | static void |
1246 | clear_req_or_option_list (ReqOrOption **r_p) | |
43cd72b9 BW |
1247 | { |
1248 | if (*r_p == NULL) | |
1249 | return; | |
1250 | ||
1251 | free ((*r_p)->option_name); | |
1252 | clear_req_or_option_list (&(*r_p)->next); | |
1253 | *r_p = NULL; | |
1254 | } | |
1255 | ||
1256 | ||
7fa3d080 BW |
1257 | static void |
1258 | clear_req_option_list (ReqOption **r_p) | |
43cd72b9 BW |
1259 | { |
1260 | if (*r_p == NULL) | |
1261 | return; | |
1262 | ||
1263 | clear_req_or_option_list (&(*r_p)->or_option_terms); | |
1264 | clear_req_option_list (&(*r_p)->next); | |
1265 | *r_p = NULL; | |
1266 | } | |
1267 | ||
1268 | ||
7fa3d080 BW |
1269 | static ReqOrOption * |
1270 | clone_req_or_option_list (ReqOrOption *req_or_option) | |
43cd72b9 BW |
1271 | { |
1272 | ReqOrOption *new_req_or_option; | |
1273 | ||
1274 | if (req_or_option == NULL) | |
1275 | return NULL; | |
1276 | ||
1277 | new_req_or_option = (ReqOrOption *) xmalloc (sizeof (ReqOrOption)); | |
1278 | new_req_or_option->option_name = xstrdup (req_or_option->option_name); | |
1279 | new_req_or_option->is_true = req_or_option->is_true; | |
1280 | new_req_or_option->next = NULL; | |
1281 | new_req_or_option->next = clone_req_or_option_list (req_or_option->next); | |
1282 | return new_req_or_option; | |
1283 | } | |
1284 | ||
1285 | ||
7fa3d080 BW |
1286 | static ReqOption * |
1287 | clone_req_option_list (ReqOption *req_option) | |
43cd72b9 BW |
1288 | { |
1289 | ReqOption *new_req_option; | |
1290 | ||
1291 | if (req_option == NULL) | |
1292 | return NULL; | |
1293 | ||
1294 | new_req_option = (ReqOption *) xmalloc (sizeof (ReqOption)); | |
1295 | new_req_option->or_option_terms = NULL; | |
1296 | new_req_option->next = NULL; | |
c138bc38 | 1297 | new_req_option->or_option_terms = |
43cd72b9 BW |
1298 | clone_req_or_option_list (req_option->or_option_terms); |
1299 | new_req_option->next = clone_req_option_list (req_option->next); | |
1300 | return new_req_option; | |
1301 | } | |
1302 | ||
1303 | ||
7fa3d080 BW |
1304 | static bfd_boolean |
1305 | parse_option_cond (const char *s, ReqOption *option) | |
43cd72b9 BW |
1306 | { |
1307 | int i; | |
1308 | split_rec option_term_rec; | |
1309 | ||
1310 | /* All option or conditions are of the form: | |
1311 | optionA + no-optionB + ... | |
1312 | "Ands" are divided by "?". */ | |
1313 | ||
1314 | init_split_rec (&option_term_rec); | |
1315 | split_string (&option_term_rec, s, '+', TRUE); | |
1316 | ||
1317 | if (option_term_rec.count == 0) | |
1318 | { | |
1319 | clear_split_rec (&option_term_rec); | |
1320 | return FALSE; | |
1321 | } | |
1322 | ||
1323 | for (i = 0; i < option_term_rec.count; i++) | |
1324 | { | |
1325 | char *option_name = option_term_rec.vec[i]; | |
1326 | bfd_boolean is_true = TRUE; | |
1327 | ReqOrOption *req; | |
1328 | ReqOrOption **r_p; | |
1329 | ||
1330 | if (strncmp (option_name, "no-", 3) == 0) | |
1331 | { | |
1332 | option_name = xstrdup (&option_name[3]); | |
1333 | is_true = FALSE; | |
1334 | } | |
1335 | else | |
1336 | option_name = xstrdup (option_name); | |
1337 | ||
1338 | req = (ReqOrOption *) xmalloc (sizeof (ReqOrOption)); | |
1339 | req->option_name = option_name; | |
1340 | req->is_true = is_true; | |
1341 | req->next = NULL; | |
1342 | ||
1343 | /* Append to list. */ | |
c138bc38 | 1344 | for (r_p = &option->or_option_terms; (*r_p) != NULL; |
43cd72b9 BW |
1345 | r_p = &(*r_p)->next) |
1346 | ; | |
1347 | (*r_p) = req; | |
1348 | } | |
1349 | return TRUE; | |
1350 | } | |
1351 | ||
1352 | ||
e0001a05 NC |
1353 | /* Parse a string like: |
1354 | "insn op1, op2, op3, op4 | op1 != op2 | op2 == op3 | op4 == 1". | |
1355 | I.E., instruction "insn" with 4 operands where operand 1 and 2 are not | |
43cd72b9 BW |
1356 | the same and operand 2 and 3 are the same and operand 4 is 1. |
1357 | ||
1358 | or: | |
1359 | ||
1360 | "insn op1 | op1 == 1 / density + boolean / no-useroption". | |
1361 | i.e. instruction "insn" with 1 operands where operand 1 is 1 | |
1362 | when "density" or "boolean" options are available and | |
1363 | "useroption" is not available. | |
1364 | ||
1365 | Because the current implementation of this parsing scheme uses | |
1366 | split_string, it requires that '|' and '?' are only used as | |
1367 | delimiters for predicates and required options. */ | |
e0001a05 | 1368 | |
7fa3d080 BW |
1369 | static bfd_boolean |
1370 | parse_insn_pattern (const char *in, insn_pattern *insn) | |
e0001a05 | 1371 | { |
e0001a05 | 1372 | split_rec rec; |
43cd72b9 BW |
1373 | split_rec optionrec; |
1374 | int i; | |
e0001a05 | 1375 | |
e0001a05 NC |
1376 | init_insn_pattern (insn); |
1377 | ||
43cd72b9 BW |
1378 | init_split_rec (&optionrec); |
1379 | split_string (&optionrec, in, '?', TRUE); | |
1380 | if (optionrec.count == 0) | |
1381 | { | |
1382 | clear_split_rec (&optionrec); | |
1383 | return FALSE; | |
1384 | } | |
c138bc38 | 1385 | |
43cd72b9 BW |
1386 | init_split_rec (&rec); |
1387 | ||
1388 | split_string (&rec, optionrec.vec[0], '|', TRUE); | |
e0001a05 NC |
1389 | |
1390 | if (rec.count == 0) | |
1391 | { | |
1392 | clear_split_rec (&rec); | |
43cd72b9 | 1393 | clear_split_rec (&optionrec); |
e0001a05 NC |
1394 | return FALSE; |
1395 | } | |
1396 | ||
1397 | if (!parse_insn_templ (rec.vec[0], &insn->t)) | |
1398 | { | |
1399 | clear_split_rec (&rec); | |
43cd72b9 | 1400 | clear_split_rec (&optionrec); |
e0001a05 NC |
1401 | return FALSE; |
1402 | } | |
1403 | ||
1404 | for (i = 1; i < rec.count; i++) | |
1405 | { | |
1406 | precond_e *cond = (precond_e *) xmalloc (sizeof (precond_e)); | |
1407 | ||
1408 | if (!parse_precond (rec.vec[i], cond)) | |
1409 | { | |
1410 | clear_split_rec (&rec); | |
43cd72b9 | 1411 | clear_split_rec (&optionrec); |
e0001a05 NC |
1412 | clear_insn_pattern (insn); |
1413 | return FALSE; | |
1414 | } | |
1415 | ||
1416 | /* Append the condition. */ | |
1417 | *insn->preconds.tail = cond; | |
1418 | insn->preconds.tail = &cond->next; | |
1419 | } | |
1420 | ||
43cd72b9 BW |
1421 | for (i = 1; i < optionrec.count; i++) |
1422 | { | |
1423 | /* Handle the option conditions. */ | |
1424 | ReqOption **r_p; | |
1425 | ReqOption *req_option = (ReqOption *) xmalloc (sizeof (ReqOption)); | |
1426 | req_option->or_option_terms = NULL; | |
1427 | req_option->next = NULL; | |
c138bc38 | 1428 | |
43cd72b9 BW |
1429 | if (!parse_option_cond (optionrec.vec[i], req_option)) |
1430 | { | |
1431 | clear_split_rec (&rec); | |
1432 | clear_split_rec (&optionrec); | |
1433 | clear_insn_pattern (insn); | |
1434 | clear_req_option_list (&req_option); | |
1435 | return FALSE; | |
1436 | } | |
1437 | ||
1438 | /* Append the condition. */ | |
1439 | for (r_p = &insn->options; (*r_p) != NULL; r_p = &(*r_p)->next) | |
1440 | ; | |
1441 | ||
1442 | (*r_p) = req_option; | |
1443 | } | |
1444 | ||
e0001a05 | 1445 | clear_split_rec (&rec); |
43cd72b9 | 1446 | clear_split_rec (&optionrec); |
e0001a05 NC |
1447 | return TRUE; |
1448 | } | |
1449 | ||
1450 | ||
7fa3d080 BW |
1451 | static bfd_boolean |
1452 | parse_insn_repl (const char *in, insn_repl *r_p) | |
e0001a05 NC |
1453 | { |
1454 | /* This is a list of instruction templates separated by ';'. */ | |
1455 | split_rec rec; | |
43cd72b9 | 1456 | int i; |
e0001a05 NC |
1457 | |
1458 | split_string (&rec, in, ';', TRUE); | |
1459 | ||
1460 | for (i = 0; i < rec.count; i++) | |
1461 | { | |
1462 | insn_repl_e *e = (insn_repl_e *) xmalloc (sizeof (insn_repl_e)); | |
1463 | ||
1464 | e->next = NULL; | |
1465 | ||
1466 | if (!parse_insn_templ (rec.vec[i], &e->t)) | |
1467 | { | |
1468 | free (e); | |
1469 | clear_insn_repl (r_p); | |
1470 | return FALSE; | |
1471 | } | |
1472 | *r_p->tail = e; | |
1473 | r_p->tail = &e->next; | |
1474 | } | |
1475 | return TRUE; | |
1476 | } | |
1477 | ||
1478 | ||
7fa3d080 BW |
1479 | static bfd_boolean |
1480 | transition_applies (insn_pattern *initial_insn, | |
1481 | const char *from_string ATTRIBUTE_UNUSED, | |
1482 | const char *to_string ATTRIBUTE_UNUSED) | |
43cd72b9 BW |
1483 | { |
1484 | ReqOption *req_option; | |
1485 | ||
1486 | for (req_option = initial_insn->options; | |
1487 | req_option != NULL; | |
1488 | req_option = req_option->next) | |
1489 | { | |
1490 | ReqOrOption *req_or_option = req_option->or_option_terms; | |
1491 | ||
1492 | if (req_or_option == NULL | |
1493 | || req_or_option->next != NULL) | |
1494 | continue; | |
1495 | ||
c138bc38 | 1496 | if (strncmp (req_or_option->option_name, "IsaUse", 6) == 0) |
43cd72b9 BW |
1497 | { |
1498 | bfd_boolean option_available = FALSE; | |
1499 | char *option_name = req_or_option->option_name + 6; | |
1500 | if (!strcmp (option_name, "DensityInstruction")) | |
1501 | option_available = (XCHAL_HAVE_DENSITY == 1); | |
1502 | else if (!strcmp (option_name, "L32R")) | |
1503 | option_available = (XCHAL_HAVE_L32R == 1); | |
1504 | else if (!strcmp (option_name, "Const16")) | |
1505 | option_available = (XCHAL_HAVE_CONST16 == 1); | |
1506 | else if (!strcmp (option_name, "Loops")) | |
1507 | option_available = (XCHAL_HAVE_LOOPS == 1); | |
b2d179be BW |
1508 | else if (!strcmp (option_name, "WideBranches")) |
1509 | option_available = (XCHAL_HAVE_WIDE_BRANCHES == 1); | |
43cd72b9 BW |
1510 | else if (!strcmp (option_name, "PredictedBranches")) |
1511 | option_available = (XCHAL_HAVE_PREDICTED_BRANCHES == 1); | |
1512 | else if (!strcmp (option_name, "Booleans")) | |
1513 | option_available = (XCHAL_HAVE_BOOLEANS == 1); | |
1514 | else | |
1515 | as_warn (_("invalid configuration option '%s' in transition rule '%s'"), | |
1516 | req_or_option->option_name, from_string); | |
1517 | if ((option_available ^ req_or_option->is_true) != 0) | |
1518 | return FALSE; | |
1519 | } | |
1520 | else if (strcmp (req_or_option->option_name, "realnop") == 0) | |
1521 | { | |
c138bc38 | 1522 | bfd_boolean nop_available = |
43cd72b9 BW |
1523 | (xtensa_opcode_lookup (xtensa_default_isa, "nop") |
1524 | != XTENSA_UNDEFINED); | |
1525 | if ((nop_available ^ req_or_option->is_true) != 0) | |
1526 | return FALSE; | |
1527 | } | |
1528 | } | |
1529 | return TRUE; | |
1530 | } | |
1531 | ||
1532 | ||
1946c96e BW |
1533 | static bfd_boolean |
1534 | wide_branch_opcode (const char *opcode_name, | |
1535 | char *suffix, | |
1536 | xtensa_opcode *popcode) | |
1537 | { | |
1538 | xtensa_isa isa = xtensa_default_isa; | |
1539 | xtensa_opcode opcode; | |
1540 | static char wbr_name_buf[20]; | |
1541 | ||
1542 | if (strncmp (opcode_name, "WIDE.", 5) != 0) | |
1543 | return FALSE; | |
1544 | ||
1545 | strcpy (wbr_name_buf, opcode_name + 5); | |
1546 | strcat (wbr_name_buf, suffix); | |
1547 | opcode = xtensa_opcode_lookup (isa, wbr_name_buf); | |
1548 | if (opcode != XTENSA_UNDEFINED) | |
1549 | { | |
1550 | *popcode = opcode; | |
1551 | return TRUE; | |
1552 | } | |
1553 | ||
1554 | return FALSE; | |
1555 | } | |
1556 | ||
1557 | ||
7fa3d080 BW |
1558 | static TransitionRule * |
1559 | build_transition (insn_pattern *initial_insn, | |
1560 | insn_repl *replace_insns, | |
1561 | const char *from_string, | |
1562 | const char *to_string) | |
e0001a05 NC |
1563 | { |
1564 | TransitionRule *tr = NULL; | |
1565 | xtensa_opcode opcode; | |
1566 | xtensa_isa isa = xtensa_default_isa; | |
1567 | ||
1568 | opname_map_e *op1; | |
1569 | opname_map_e *op2; | |
1570 | ||
1571 | precond_e *precond; | |
1572 | insn_repl_e *r; | |
e0001a05 NC |
1573 | |
1574 | opcode = xtensa_opcode_lookup (isa, initial_insn->t.opcode_name); | |
1575 | if (opcode == XTENSA_UNDEFINED) | |
1576 | { | |
1577 | /* It is OK to not be able to translate some of these opcodes. */ | |
e0001a05 NC |
1578 | return NULL; |
1579 | } | |
1580 | ||
1581 | ||
43cd72b9 BW |
1582 | if (xtensa_opcode_num_operands (isa, opcode) |
1583 | != insn_templ_operand_count (&initial_insn->t)) | |
e0001a05 NC |
1584 | { |
1585 | /* This is also OK because there are opcodes that | |
1586 | have different numbers of operands on different | |
1587 | architecture variations. */ | |
e0001a05 NC |
1588 | return NULL; |
1589 | } | |
1590 | ||
1591 | tr = (TransitionRule *) xmalloc (sizeof (TransitionRule)); | |
1592 | tr->opcode = opcode; | |
1593 | tr->conditions = NULL; | |
1594 | tr->to_instr = NULL; | |
1595 | ||
1596 | /* Build the conditions. First, equivalent operand condition.... */ | |
1597 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) | |
1598 | { | |
1599 | for (op2 = op1->next; op2 != NULL; op2 = op2->next) | |
1600 | { | |
1601 | if (same_operand_name (op1, op2)) | |
1602 | { | |
1603 | append_value_condition (tr, OP_EQUAL, | |
1604 | op1->operand_num, op2->operand_num); | |
1605 | } | |
1606 | } | |
1607 | } | |
1608 | ||
1609 | /* Now the condition that an operand value must be a constant.... */ | |
1610 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) | |
1611 | { | |
1612 | if (op_is_constant (op1)) | |
1613 | { | |
1614 | append_constant_value_condition (tr, | |
1615 | OP_EQUAL, | |
1616 | op1->operand_num, | |
1617 | op_get_constant (op1)); | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | ||
1622 | /* Now add the explicit preconditions listed after the "|" in the spec. | |
1623 | These are currently very limited, so we do a special case | |
1624 | parse for them. We expect spaces, opname != opname. */ | |
1625 | for (precond = initial_insn->preconds.head; | |
1626 | precond != NULL; | |
1627 | precond = precond->next) | |
1628 | { | |
1629 | op1 = NULL; | |
1630 | op2 = NULL; | |
1631 | ||
1632 | if (precond->opname1) | |
1633 | { | |
1634 | op1 = get_opmatch (&initial_insn->t.operand_map, precond->opname1); | |
1635 | if (op1 == NULL) | |
bc447904 BW |
1636 | as_fatal (_("opcode '%s': no bound opname '%s' " |
1637 | "for precondition in '%s'"), | |
1638 | xtensa_opcode_name (isa, opcode), | |
1639 | precond->opname1, from_string); | |
e0001a05 NC |
1640 | } |
1641 | ||
1642 | if (precond->opname2) | |
1643 | { | |
1644 | op2 = get_opmatch (&initial_insn->t.operand_map, precond->opname2); | |
1645 | if (op2 == NULL) | |
bc447904 BW |
1646 | as_fatal (_("opcode '%s': no bound opname '%s' " |
1647 | "for precondition in %s"), | |
1648 | xtensa_opcode_name (isa, opcode), | |
1649 | precond->opname2, from_string); | |
e0001a05 NC |
1650 | } |
1651 | ||
1652 | if (op1 == NULL && op2 == NULL) | |
bc447904 BW |
1653 | as_fatal (_("opcode '%s': precondition only contains " |
1654 | "constants in '%s'"), | |
1655 | xtensa_opcode_name (isa, opcode), from_string); | |
e0001a05 NC |
1656 | else if (op1 != NULL && op2 != NULL) |
1657 | append_value_condition (tr, precond->cmpop, | |
1658 | op1->operand_num, op2->operand_num); | |
1659 | else if (op2 == NULL) | |
1660 | append_constant_value_condition (tr, precond->cmpop, | |
43cd72b9 | 1661 | op1->operand_num, precond->opval2); |
e0001a05 NC |
1662 | else |
1663 | append_constant_value_condition (tr, precond->cmpop, | |
43cd72b9 | 1664 | op2->operand_num, precond->opval1); |
e0001a05 NC |
1665 | } |
1666 | ||
43cd72b9 BW |
1667 | tr->options = clone_req_option_list (initial_insn->options); |
1668 | ||
e0001a05 | 1669 | /* Generate the replacement instructions. Some of these |
61376837 BW |
1670 | "instructions" are actually labels and literals. There can be at |
1671 | most one literal and at most one label. A literal must be defined | |
1672 | (e.g., "LITERAL %imm") before use (e.g., "%LITERAL"). The labels | |
1673 | can be used before they are defined. Also there are a number of | |
1674 | special operands (e.g., HI24S). */ | |
e0001a05 NC |
1675 | |
1676 | for (r = replace_insns->head; r != NULL; r = r->next) | |
1677 | { | |
1678 | BuildInstr *bi; | |
1679 | const char *opcode_name; | |
43cd72b9 | 1680 | int operand_count; |
e0001a05 | 1681 | opname_map_e *op; |
e0001a05 NC |
1682 | const char *fn_name; |
1683 | const char *operand_arg_name; | |
1684 | ||
1685 | bi = (BuildInstr *) xmalloc (sizeof (BuildInstr)); | |
1686 | append_build_insn (tr, bi); | |
1687 | ||
e0001a05 NC |
1688 | bi->opcode = XTENSA_UNDEFINED; |
1689 | bi->ops = NULL; | |
1690 | bi->next = NULL; | |
1691 | ||
1692 | opcode_name = r->t.opcode_name; | |
1693 | operand_count = insn_templ_operand_count (&r->t); | |
1694 | ||
61376837 | 1695 | if (strcmp (opcode_name, "LITERAL") == 0) |
e0001a05 NC |
1696 | { |
1697 | bi->typ = INSTR_LITERAL_DEF; | |
e0001a05 NC |
1698 | if (operand_count != 1) |
1699 | as_fatal (_("expected one operand for generated literal")); | |
e0001a05 | 1700 | } |
61376837 | 1701 | else if (strcmp (opcode_name, "LABEL") == 0) |
e0001a05 NC |
1702 | { |
1703 | bi->typ = INSTR_LABEL_DEF; | |
e0001a05 NC |
1704 | if (operand_count != 0) |
1705 | as_fatal (_("expected 0 operands for generated label")); | |
1706 | } | |
1707 | else | |
1708 | { | |
1709 | bi->typ = INSTR_INSTR; | |
1946c96e BW |
1710 | if (wide_branch_opcode (opcode_name, ".w18", &bi->opcode) |
1711 | || wide_branch_opcode (opcode_name, ".w15", &bi->opcode)) | |
1712 | opcode_name = xtensa_opcode_name (isa, bi->opcode); | |
1713 | else | |
1714 | bi->opcode = xtensa_opcode_lookup (isa, opcode_name); | |
1715 | ||
e0001a05 | 1716 | if (bi->opcode == XTENSA_UNDEFINED) |
43cd72b9 BW |
1717 | { |
1718 | as_warn (_("invalid opcode '%s' in transition rule '%s'"), | |
1946c96e | 1719 | opcode_name, to_string); |
43cd72b9 BW |
1720 | return NULL; |
1721 | } | |
1946c96e | 1722 | |
e0001a05 | 1723 | /* Check for the right number of ops. */ |
c138bc38 | 1724 | if (xtensa_opcode_num_operands (isa, bi->opcode) |
e0001a05 NC |
1725 | != (int) operand_count) |
1726 | as_fatal (_("opcode '%s': replacement does not have %d ops"), | |
43cd72b9 BW |
1727 | opcode_name, |
1728 | xtensa_opcode_num_operands (isa, bi->opcode)); | |
e0001a05 NC |
1729 | } |
1730 | ||
1731 | for (op = r->t.operand_map.head; op != NULL; op = op->next) | |
1732 | { | |
1733 | unsigned idnum; | |
1734 | ||
1735 | if (op_is_constant (op)) | |
1736 | append_constant_op (bi, op->operand_num, op_get_constant (op)); | |
61376837 BW |
1737 | else if (strcmp (op->operand_name, "%LITERAL") == 0) |
1738 | append_literal_op (bi, op->operand_num); | |
1739 | else if (strcmp (op->operand_name, "%LABEL") == 0) | |
1740 | append_label_op (bi, op->operand_num); | |
1741 | else if (op->operand_name[0] == 'a' | |
1742 | && parse_constant (op->operand_name + 1, &idnum)) | |
e0001a05 NC |
1743 | append_constant_op (bi, op->operand_num, idnum); |
1744 | else if (op->operand_name[0] == '%') | |
1745 | { | |
1746 | opname_map_e *orig_op; | |
1747 | orig_op = get_opmatch (&initial_insn->t.operand_map, | |
1748 | op->operand_name); | |
1749 | if (orig_op == NULL) | |
bc447904 BW |
1750 | as_fatal (_("opcode %s: unidentified operand '%s' in '%s'"), |
1751 | opcode_name, op->operand_name, to_string); | |
1752 | append_field_op (bi, op->operand_num, orig_op->operand_num); | |
e0001a05 NC |
1753 | } |
1754 | else if (parse_special_fn (op->operand_name, | |
1755 | &fn_name, &operand_arg_name)) | |
1756 | { | |
1757 | opname_map_e *orig_op; | |
1758 | OpType typ = OP_CONSTANT; | |
1759 | ||
1760 | if (strcmp (fn_name, "LOW8") == 0) | |
1761 | typ = OP_OPERAND_LOW8; | |
1762 | else if (strcmp (fn_name, "HI24S") == 0) | |
1763 | typ = OP_OPERAND_HI24S; | |
1764 | else if (strcmp (fn_name, "F32MINUS") == 0) | |
1765 | typ = OP_OPERAND_F32MINUS; | |
43cd72b9 BW |
1766 | else if (strcmp (fn_name, "LOW16U") == 0) |
1767 | typ = OP_OPERAND_LOW16U; | |
1768 | else if (strcmp (fn_name, "HI16U") == 0) | |
1769 | typ = OP_OPERAND_HI16U; | |
e0001a05 | 1770 | else |
43cd72b9 | 1771 | as_fatal (_("unknown user-defined function %s"), fn_name); |
e0001a05 NC |
1772 | |
1773 | orig_op = get_opmatch (&initial_insn->t.operand_map, | |
1774 | operand_arg_name); | |
1775 | if (orig_op == NULL) | |
bc447904 BW |
1776 | as_fatal (_("opcode %s: unidentified operand '%s' in '%s'"), |
1777 | opcode_name, op->operand_name, to_string); | |
1778 | append_user_fn_field_op (bi, op->operand_num, | |
1779 | typ, orig_op->operand_num); | |
e0001a05 NC |
1780 | } |
1781 | else | |
bc447904 BW |
1782 | as_fatal (_("opcode %s: could not parse operand '%s' in '%s'"), |
1783 | opcode_name, op->operand_name, to_string); | |
e0001a05 NC |
1784 | } |
1785 | } | |
e0001a05 NC |
1786 | |
1787 | return tr; | |
1788 | } | |
1789 | ||
1790 | ||
7fa3d080 BW |
1791 | static TransitionTable * |
1792 | build_transition_table (const string_pattern_pair *transitions, | |
1793 | int transition_count, | |
1794 | transition_cmp_fn cmp) | |
e0001a05 NC |
1795 | { |
1796 | TransitionTable *table = NULL; | |
43cd72b9 BW |
1797 | int num_opcodes = xtensa_isa_num_opcodes (xtensa_default_isa); |
1798 | int i, tnum; | |
e0001a05 NC |
1799 | |
1800 | if (table != NULL) | |
1801 | return table; | |
1802 | ||
1803 | /* Otherwise, build it now. */ | |
1804 | table = (TransitionTable *) xmalloc (sizeof (TransitionTable)); | |
1805 | table->num_opcodes = num_opcodes; | |
1806 | table->table = | |
1807 | (TransitionList **) xmalloc (sizeof (TransitionTable *) * num_opcodes); | |
1808 | ||
1809 | for (i = 0; i < num_opcodes; i++) | |
1810 | table->table[i] = NULL; | |
1811 | ||
1812 | for (tnum = 0; tnum < transition_count; tnum++) | |
1813 | { | |
1814 | const char *from_string = transitions[tnum].pattern; | |
1815 | const char *to_string = transitions[tnum].replacement; | |
1816 | ||
1817 | insn_pattern initial_insn; | |
1818 | insn_repl replace_insns; | |
1819 | TransitionRule *tr; | |
1820 | ||
1821 | init_insn_pattern (&initial_insn); | |
1822 | if (!parse_insn_pattern (from_string, &initial_insn)) | |
bc447904 | 1823 | as_fatal (_("could not parse INSN_PATTERN '%s'"), from_string); |
e0001a05 NC |
1824 | |
1825 | init_insn_repl (&replace_insns); | |
1826 | if (!parse_insn_repl (to_string, &replace_insns)) | |
bc447904 | 1827 | as_fatal (_("could not parse INSN_REPL '%s'"), to_string); |
e0001a05 | 1828 | |
43cd72b9 BW |
1829 | if (transition_applies (&initial_insn, from_string, to_string)) |
1830 | { | |
1831 | tr = build_transition (&initial_insn, &replace_insns, | |
1832 | from_string, to_string); | |
1833 | if (tr) | |
1834 | append_transition (table, tr->opcode, tr, cmp); | |
1835 | else | |
1836 | { | |
1837 | #if TENSILICA_DEBUG | |
1838 | as_warn (_("could not build transition for %s => %s"), | |
1839 | from_string, to_string); | |
1840 | #endif | |
1841 | } | |
1842 | } | |
e0001a05 NC |
1843 | |
1844 | clear_insn_repl (&replace_insns); | |
1845 | clear_insn_pattern (&initial_insn); | |
1846 | } | |
1847 | return table; | |
1848 | } | |
1849 | ||
1850 | \f | |
1851 | extern TransitionTable * | |
7fa3d080 | 1852 | xg_build_widen_table (transition_cmp_fn cmp) |
e0001a05 NC |
1853 | { |
1854 | static TransitionTable *table = NULL; | |
1855 | if (table == NULL) | |
43cd72b9 | 1856 | table = build_transition_table (widen_spec_list, WIDEN_COUNT, cmp); |
e0001a05 NC |
1857 | return table; |
1858 | } | |
1859 | ||
1860 | ||
1861 | extern TransitionTable * | |
7fa3d080 | 1862 | xg_build_simplify_table (transition_cmp_fn cmp) |
e0001a05 NC |
1863 | { |
1864 | static TransitionTable *table = NULL; | |
1865 | if (table == NULL) | |
43cd72b9 | 1866 | table = build_transition_table (simplify_spec_list, SIMPLIFY_COUNT, cmp); |
e0001a05 NC |
1867 | return table; |
1868 | } |