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e0001a05 | 1 | /* Table of relaxations for Xtensa assembly. |
aef6203b | 2 | Copyright 2003, 2004, 2005 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 BW |
51 | INSN_LABEL_LIT ::= INSN_TEMPL |
52 | | 'LABEL' num | |
e0001a05 NC |
53 | | 'LITERAL' num ' ' VARIABLE |
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: | |
75 | {"beqz %as,%label", "bnez %as,%LABEL0;j %label;LABEL0"} | |
76 | would convert a branch to a negated branch to the following instruction | |
77 | with a jump to the original label. | |
c138bc38 | 78 | |
e0001a05 NC |
79 | An Xtensa-specific example that generates a literal: |
80 | {"movi %at,%imm", "LITERAL0 %imm; l32r %at,%LITERAL0"} | |
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", | |
90 | "LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l32i %at,%at,0"} | |
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 NC |
103 | |
104 | /* Imported from bfd. */ | |
105 | extern xtensa_isa xtensa_default_isa; | |
106 | ||
e0001a05 NC |
107 | /* The opname_list is a small list of names that we use for opcode and |
108 | operand variable names to simplify ownership of these commonly used | |
109 | strings. Strings entered in the table can be compared by pointer | |
110 | equality. */ | |
111 | ||
112 | typedef struct opname_list_struct opname_list; | |
113 | typedef opname_list opname_e; | |
114 | ||
115 | struct opname_list_struct | |
116 | { | |
117 | char *opname; | |
118 | opname_list *next; | |
119 | }; | |
120 | ||
121 | static opname_list *local_opnames = NULL; | |
122 | ||
123 | ||
124 | /* The "opname_map" and its element structure "opname_map_e" are used | |
125 | for binding an operand number to a name or a constant. */ | |
126 | ||
127 | typedef struct opname_map_e_struct opname_map_e; | |
128 | typedef struct opname_map_struct opname_map; | |
129 | ||
130 | struct opname_map_e_struct | |
131 | { | |
132 | const char *operand_name; /* If null, then use constant_value. */ | |
43cd72b9 | 133 | int operand_num; |
e0001a05 NC |
134 | unsigned constant_value; |
135 | opname_map_e *next; | |
136 | }; | |
137 | ||
138 | struct opname_map_struct | |
139 | { | |
140 | opname_map_e *head; | |
141 | opname_map_e **tail; | |
142 | }; | |
143 | ||
144 | /* The "precond_list" and its element structure "precond_e" represents | |
145 | explicit preconditions comparing operand variables and constants. | |
146 | In the "precond_e" structure, a variable is identified by the name | |
147 | in the "opname" field. If that field is NULL, then the operand | |
148 | is the constant in field "opval". */ | |
149 | ||
150 | typedef struct precond_e_struct precond_e; | |
151 | typedef struct precond_list_struct precond_list; | |
152 | ||
153 | struct precond_e_struct | |
154 | { | |
155 | const char *opname1; | |
156 | unsigned opval1; | |
157 | CmpOp cmpop; | |
158 | const char *opname2; | |
159 | unsigned opval2; | |
160 | precond_e *next; | |
161 | }; | |
162 | ||
163 | struct precond_list_struct | |
164 | { | |
165 | precond_e *head; | |
166 | precond_e **tail; | |
167 | }; | |
168 | ||
169 | ||
170 | /* The insn_templ represents the INSN_TEMPL instruction template. It | |
171 | is an opcode name with a list of operands. These are used for | |
172 | instruction patterns and replacement patterns. */ | |
173 | ||
174 | typedef struct insn_templ_struct insn_templ; | |
175 | struct insn_templ_struct | |
176 | { | |
177 | const char *opcode_name; | |
178 | opname_map operand_map; | |
179 | }; | |
180 | ||
181 | ||
182 | /* The insn_pattern represents an INSN_PATTERN instruction pattern. | |
183 | It is an instruction template with preconditions that specify when | |
184 | it actually matches a given instruction. */ | |
185 | ||
186 | typedef struct insn_pattern_struct insn_pattern; | |
187 | struct insn_pattern_struct | |
188 | { | |
189 | insn_templ t; | |
190 | precond_list preconds; | |
43cd72b9 | 191 | ReqOptionList *options; |
e0001a05 NC |
192 | }; |
193 | ||
194 | ||
195 | /* The "insn_repl" and associated element structure "insn_repl_e" | |
196 | instruction replacement list is a list of | |
197 | instructions/LITERALS/LABELS with constant operands or operands | |
198 | with names bound to the operand names in the associated pattern. */ | |
199 | ||
200 | typedef struct insn_repl_e_struct insn_repl_e; | |
201 | struct insn_repl_e_struct | |
202 | { | |
203 | insn_templ t; | |
204 | insn_repl_e *next; | |
205 | }; | |
206 | ||
207 | typedef struct insn_repl_struct insn_repl; | |
208 | struct insn_repl_struct | |
209 | { | |
210 | insn_repl_e *head; | |
211 | insn_repl_e **tail; | |
212 | }; | |
213 | ||
214 | ||
215 | /* The split_rec is a vector of allocated char * pointers. */ | |
216 | ||
217 | typedef struct split_rec_struct split_rec; | |
218 | struct split_rec_struct | |
219 | { | |
220 | char **vec; | |
43cd72b9 | 221 | int count; |
e0001a05 NC |
222 | }; |
223 | ||
224 | /* The "string_pattern_pair" is a set of pairs containing instruction | |
225 | patterns and replacement strings. */ | |
226 | ||
227 | typedef struct string_pattern_pair_struct string_pattern_pair; | |
228 | struct string_pattern_pair_struct | |
229 | { | |
230 | const char *pattern; | |
231 | const char *replacement; | |
232 | }; | |
233 | ||
234 | \f | |
235 | /* The widen_spec_list is a list of valid substitutions that generate | |
236 | wider representations. These are generally used to specify | |
237 | replacements for instructions whose immediates do not fit their | |
33b7f697 | 238 | encodings. A valid transition may require multiple steps of |
e0001a05 NC |
239 | one-to-one instruction replacements with a final multiple |
240 | instruction replacement. As an example, here are the transitions | |
241 | required to replace an 'addi.n' with an 'addi', 'addmi'. | |
242 | ||
243 | addi.n a4, 0x1010 | |
244 | => addi a4, 0x1010 | |
245 | => addmi a4, 0x1010 | |
246 | => addmi a4, 0x1000, addi a4, 0x10. */ | |
247 | ||
248 | static string_pattern_pair widen_spec_list[] = | |
249 | { | |
43cd72b9 BW |
250 | {"add.n %ar,%as,%at ? IsaUseDensityInstruction", "add %ar,%as,%at"}, |
251 | {"addi.n %ar,%as,%imm ? IsaUseDensityInstruction", "addi %ar,%as,%imm"}, | |
252 | {"beqz.n %as,%label ? IsaUseDensityInstruction", "beqz %as,%label"}, | |
253 | {"bnez.n %as,%label ? IsaUseDensityInstruction", "bnez %as,%label"}, | |
254 | {"l32i.n %at,%as,%imm ? IsaUseDensityInstruction", "l32i %at,%as,%imm"}, | |
255 | {"mov.n %at,%as ? IsaUseDensityInstruction", "or %at,%as,%as"}, | |
256 | {"movi.n %as,%imm ? IsaUseDensityInstruction", "movi %as,%imm"}, | |
257 | {"nop.n ? IsaUseDensityInstruction ? realnop", "nop"}, | |
258 | {"nop.n ? IsaUseDensityInstruction ? no-realnop", "or 1,1,1"}, | |
259 | {"ret.n %as ? IsaUseDensityInstruction", "ret %as"}, | |
260 | {"retw.n %as ? IsaUseDensityInstruction", "retw %as"}, | |
261 | {"s32i.n %at,%as,%imm ? IsaUseDensityInstruction", "s32i %at,%as,%imm"}, | |
e0001a05 NC |
262 | {"srli %at,%as,%imm", "extui %at,%as,%imm,F32MINUS(%imm)"}, |
263 | {"slli %ar,%as,0", "or %ar,%as,%as"}, | |
43cd72b9 BW |
264 | |
265 | /* Widening with literals or const16. */ | |
c138bc38 | 266 | {"movi %at,%imm ? IsaUseL32R ", |
43cd72b9 | 267 | "LITERAL0 %imm; l32r %at,%LITERAL0"}, |
c138bc38 | 268 | {"movi %at,%imm ? IsaUseConst16", |
43cd72b9 BW |
269 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm)"}, |
270 | ||
e0001a05 NC |
271 | {"addi %ar,%as,%imm", "addmi %ar,%as,%imm"}, |
272 | /* LOW8 is the low 8 bits of the Immed | |
273 | MID8S is the middle 8 bits of the Immed */ | |
274 | {"addmi %ar,%as,%imm", "addmi %ar,%as,HI24S(%imm); addi %ar,%ar,LOW8(%imm)"}, | |
43cd72b9 BW |
275 | |
276 | /* In the end convert to either an l32r or const16. */ | |
277 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseL32R", | |
e0001a05 | 278 | "LITERAL0 %imm; l32r %ar,%LITERAL0; add %ar,%as,%ar"}, |
43cd72b9 BW |
279 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseConst16", |
280 | "const16 %ar,HI16U(%imm); const16 %ar,LOW16U(%imm); add %ar,%as,%ar"}, | |
e0001a05 NC |
281 | |
282 | /* Widening the load instructions with too-large immediates */ | |
43cd72b9 | 283 | {"l8ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
e0001a05 | 284 | "LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l8ui %at,%at,0"}, |
43cd72b9 | 285 | {"l16si %at,%as,%imm | %at!=%as ? IsaUseL32R", |
e0001a05 | 286 | "LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l16si %at,%at,0"}, |
43cd72b9 | 287 | {"l16ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
e0001a05 | 288 | "LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l16ui %at,%at,0"}, |
43cd72b9 BW |
289 | {"l32i %at,%as,%imm | %at!=%as ? IsaUseL32R", |
290 | "LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l32i %at,%at,0"}, | |
291 | ||
292 | /* Widening load instructions with const16s. */ | |
293 | {"l8ui %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
294 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l8ui %at,%at,0"}, | |
295 | {"l16si %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
296 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16si %at,%at,0"}, | |
297 | {"l16ui %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
298 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16ui %at,%at,0"}, | |
299 | {"l32i %at,%as,%imm | %at!=%as ? IsaUseConst16", | |
300 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l32i %at,%at,0"}, | |
301 | ||
43cd72b9 BW |
302 | /* This is only PART of the loop instruction. In addition, |
303 | hardcoded into its use is a modification of the final operand in | |
304 | the instruction in bytes 9 and 12. */ | |
305 | {"loop %as,%label | %as!=1 ? IsaUseLoops", | |
e0001a05 | 306 | "loop %as,%LABEL0;" |
43cd72b9 BW |
307 | "rsr.lend %as;" /* LEND */ |
308 | "wsr.lbeg %as;" /* LBEG */ | |
e0001a05 NC |
309 | "addi %as, %as, 0;" /* lo8(%label-%LABEL1) */ |
310 | "addmi %as, %as, 0;" /* mid8(%label-%LABEL1) */ | |
43cd72b9 | 311 | "wsr.lend %as;" |
e0001a05 | 312 | "isync;" |
43cd72b9 | 313 | "rsr.lcount %as;" /* LCOUNT */ |
e0001a05 NC |
314 | "addi %as, %as, 1;" /* density -> addi.n %as, %as, 1 */ |
315 | "LABEL0"}, | |
43cd72b9 BW |
316 | {"loopgtz %as,%label | %as!=1 ? IsaUseLoops", |
317 | "beqz %as,%label;" | |
318 | "bltz %as,%label;" | |
e0001a05 | 319 | "loopgtz %as,%LABEL0;" |
43cd72b9 BW |
320 | "rsr.lend %as;" /* LEND */ |
321 | "wsr.lbeg %as;" /* LBEG */ | |
e0001a05 NC |
322 | "addi %as, %as, 0;" /* lo8(%label-%LABEL1) */ |
323 | "addmi %as, %as, 0;" /* mid8(%label-%LABEL1) */ | |
43cd72b9 | 324 | "wsr.lend %as;" |
e0001a05 | 325 | "isync;" |
43cd72b9 | 326 | "rsr.lcount %as;" /* LCOUNT */ |
e0001a05 NC |
327 | "addi %as, %as, 1;" /* density -> addi.n %as, %as, 1 */ |
328 | "LABEL0"}, | |
43cd72b9 | 329 | {"loopnez %as,%label | %as!=1 ? IsaUseLoops", |
e0001a05 NC |
330 | "beqz %as,%label;" |
331 | "loopnez %as,%LABEL0;" | |
43cd72b9 BW |
332 | "rsr.lend %as;" /* LEND */ |
333 | "wsr.lbeg %as;" /* LBEG */ | |
e0001a05 NC |
334 | "addi %as, %as, 0;" /* lo8(%label-%LABEL1) */ |
335 | "addmi %as, %as, 0;" /* mid8(%label-%LABEL1) */ | |
43cd72b9 | 336 | "wsr.lend %as;" |
e0001a05 | 337 | "isync;" |
43cd72b9 | 338 | "rsr.lcount %as;" /* LCOUNT */ |
e0001a05 NC |
339 | "addi %as, %as, 1;" /* density -> addi.n %as, %as, 1 */ |
340 | "LABEL0"}, | |
341 | ||
b2d179be BW |
342 | /* Relaxing to wide branches. Order is important here. With wide |
343 | branches, there is more than one correct relaxation for an | |
344 | out-of-range branch. Put the wide branch relaxations first in the | |
345 | table since they are more efficient than the branch-around | |
346 | relaxations. */ | |
347 | ||
348 | {"beqz %as,%label ? IsaUseWideBranches", "beqz.w18 %as,%label"}, | |
349 | {"bnez %as,%label ? IsaUseWideBranches", "bnez.w18 %as,%label"}, | |
350 | {"bgez %as,%label ? IsaUseWideBranches", "bgez.w18 %as,%label"}, | |
351 | {"bltz %as,%label ? IsaUseWideBranches", "bltz.w18 %as,%label"}, | |
352 | {"beqi %as,%imm,%label ? IsaUseWideBranches", "beqi.w18 %as,%imm,%label"}, | |
353 | {"bnei %as,%imm,%label ? IsaUseWideBranches", "bnei.w18 %as,%imm,%label"}, | |
354 | {"bgei %as,%imm,%label ? IsaUseWideBranches", "bgei.w18 %as,%imm,%label"}, | |
355 | {"blti %as,%imm,%label ? IsaUseWideBranches", "blti.w18 %as,%imm,%label"}, | |
356 | {"bgeui %as,%imm,%label ? IsaUseWideBranches", "bgeui.w18 %as,%imm,%label"}, | |
357 | {"bltui %as,%imm,%label ? IsaUseWideBranches", "bltui.w18 %as,%imm,%label"}, | |
358 | {"bbci %as,%imm,%label ? IsaUseWideBranches", "bbci.w18 %as,%imm,%label"}, | |
359 | {"bbsi %as,%imm,%label ? IsaUseWideBranches", "bbsi.w18 %as,%imm,%label"}, | |
360 | {"beq %as,%at,%label ? IsaUseWideBranches", "beq.w18 %as,%at,%label"}, | |
361 | {"bne %as,%at,%label ? IsaUseWideBranches", "bne.w18 %as,%at,%label"}, | |
362 | {"bge %as,%at,%label ? IsaUseWideBranches", "bge.w18 %as,%at,%label"}, | |
363 | {"blt %as,%at,%label ? IsaUseWideBranches", "blt.w18 %as,%at,%label"}, | |
364 | {"bgeu %as,%at,%label ? IsaUseWideBranches", "bgeu.w18 %as,%at,%label"}, | |
365 | {"bltu %as,%at,%label ? IsaUseWideBranches", "bltu.w18 %as,%at,%label"}, | |
366 | {"bany %as,%at,%label ? IsaUseWideBranches", "bany.w18 %as,%at,%label"}, | |
367 | {"bnone %as,%at,%label ? IsaUseWideBranches", "bnone.w18 %as,%at,%label"}, | |
368 | {"ball %as,%at,%label ? IsaUseWideBranches", "ball.w18 %as,%at,%label"}, | |
369 | {"bnall %as,%at,%label ? IsaUseWideBranches", "bnall.w18 %as,%at,%label"}, | |
370 | {"bbc %as,%at,%label ? IsaUseWideBranches", "bbc.w18 %as,%at,%label"}, | |
371 | {"bbs %as,%at,%label ? IsaUseWideBranches", "bbs.w18 %as,%at,%label"}, | |
372 | ||
373 | /* Widening branch comparisons eq/ne to zero. Prefer relaxing to narrow | |
374 | branches if the density option is available. */ | |
43cd72b9 BW |
375 | {"beqz %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%LABEL0;j %label;LABEL0"}, |
376 | {"bnez %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%LABEL0;j %label;LABEL0"}, | |
e0001a05 NC |
377 | {"beqz %as,%label", "bnez %as,%LABEL0;j %label;LABEL0"}, |
378 | {"bnez %as,%label", "beqz %as,%LABEL0;j %label;LABEL0"}, | |
b2d179be BW |
379 | |
380 | /* Widening expect-taken branches. */ | |
43cd72b9 BW |
381 | {"beqzt %as,%label ? IsaUsePredictedBranches", "bnez %as,%LABEL0;j %label;LABEL0"}, |
382 | {"bnezt %as,%label ? IsaUsePredictedBranches", "beqz %as,%LABEL0;j %label;LABEL0"}, | |
b2d179be BW |
383 | {"beqt %as,%at,%label ? IsaUsePredictedBranches", "bne %as,%at,%LABEL0;j %label;LABEL0"}, |
384 | {"bnet %as,%at,%label ? IsaUsePredictedBranches", "beq %as,%at,%LABEL0;j %label;LABEL0"}, | |
385 | ||
386 | /* Widening branches from the Xtensa boolean option. */ | |
387 | {"bt %bs,%label ? IsaUseBooleans", "bf %bs,%LABEL0;j %label;LABEL0"}, | |
388 | {"bf %bs,%label ? IsaUseBooleans", "bt %bs,%LABEL0;j %label;LABEL0"}, | |
e0001a05 | 389 | |
b2d179be | 390 | /* Other branch-around-jump widenings. */ |
e0001a05 NC |
391 | {"bgez %as,%label", "bltz %as,%LABEL0;j %label;LABEL0"}, |
392 | {"bltz %as,%label", "bgez %as,%LABEL0;j %label;LABEL0"}, | |
393 | {"beqi %as,%imm,%label", "bnei %as,%imm,%LABEL0;j %label;LABEL0"}, | |
394 | {"bnei %as,%imm,%label", "beqi %as,%imm,%LABEL0;j %label;LABEL0"}, | |
395 | {"bgei %as,%imm,%label", "blti %as,%imm,%LABEL0;j %label;LABEL0"}, | |
396 | {"blti %as,%imm,%label", "bgei %as,%imm,%LABEL0;j %label;LABEL0"}, | |
397 | {"bgeui %as,%imm,%label", "bltui %as,%imm,%LABEL0;j %label;LABEL0"}, | |
398 | {"bltui %as,%imm,%label", "bgeui %as,%imm,%LABEL0;j %label;LABEL0"}, | |
399 | {"bbci %as,%imm,%label", "bbsi %as,%imm,%LABEL0;j %label;LABEL0"}, | |
400 | {"bbsi %as,%imm,%label", "bbci %as,%imm,%LABEL0;j %label;LABEL0"}, | |
401 | {"beq %as,%at,%label", "bne %as,%at,%LABEL0;j %label;LABEL0"}, | |
402 | {"bne %as,%at,%label", "beq %as,%at,%LABEL0;j %label;LABEL0"}, | |
403 | {"bge %as,%at,%label", "blt %as,%at,%LABEL0;j %label;LABEL0"}, | |
404 | {"blt %as,%at,%label", "bge %as,%at,%LABEL0;j %label;LABEL0"}, | |
405 | {"bgeu %as,%at,%label", "bltu %as,%at,%LABEL0;j %label;LABEL0"}, | |
406 | {"bltu %as,%at,%label", "bgeu %as,%at,%LABEL0;j %label;LABEL0"}, | |
407 | {"bany %as,%at,%label", "bnone %as,%at,%LABEL0;j %label;LABEL0"}, | |
e0001a05 NC |
408 | {"bnone %as,%at,%label", "bany %as,%at,%LABEL0;j %label;LABEL0"}, |
409 | {"ball %as,%at,%label", "bnall %as,%at,%LABEL0;j %label;LABEL0"}, | |
410 | {"bnall %as,%at,%label", "ball %as,%at,%LABEL0;j %label;LABEL0"}, | |
411 | {"bbc %as,%at,%label", "bbs %as,%at,%LABEL0;j %label;LABEL0"}, | |
412 | {"bbs %as,%at,%label", "bbc %as,%at,%LABEL0;j %label;LABEL0"}, | |
43cd72b9 BW |
413 | |
414 | /* Expanding calls with literals. */ | |
415 | {"call0 %label,%ar0 ? IsaUseL32R", | |
416 | "LITERAL0 %label; l32r a0,%LITERAL0; callx0 a0,%ar0"}, | |
417 | {"call4 %label,%ar4 ? IsaUseL32R", | |
418 | "LITERAL0 %label; l32r a4,%LITERAL0; callx4 a4,%ar4"}, | |
419 | {"call8 %label,%ar8 ? IsaUseL32R", | |
420 | "LITERAL0 %label; l32r a8,%LITERAL0; callx8 a8,%ar8"}, | |
421 | {"call12 %label,%ar12 ? IsaUseL32R", | |
422 | "LITERAL0 %label; l32r a12,%LITERAL0; callx12 a12,%ar12"}, | |
423 | ||
424 | /* Expanding calls with const16. */ | |
425 | {"call0 %label,%ar0 ? IsaUseConst16", | |
426 | "const16 a0,HI16U(%label); const16 a0,LOW16U(%label); callx0 a0,%ar0"}, | |
427 | {"call4 %label,%ar4 ? IsaUseConst16", | |
428 | "const16 a4,HI16U(%label); const16 a4,LOW16U(%label); callx4 a4,%ar4"}, | |
429 | {"call8 %label,%ar8 ? IsaUseConst16", | |
430 | "const16 a8,HI16U(%label); const16 a8,LOW16U(%label); callx8 a8,%ar8"}, | |
431 | {"call12 %label,%ar12 ? IsaUseConst16", | |
432 | "const16 a12,HI16U(%label); const16 a12,LOW16U(%label); callx12 a12,%ar12"} | |
e0001a05 NC |
433 | }; |
434 | ||
435 | #define WIDEN_COUNT (sizeof (widen_spec_list) / sizeof (string_pattern_pair)) | |
436 | ||
437 | ||
438 | /* The simplify_spec_list specifies simplifying transformations that | |
439 | will reduce the instruction width or otherwise simplify an | |
440 | instruction. These are usually applied before relaxation in the | |
441 | assembler. It is always legal to simplify. Even for "addi as, 0", | |
442 | the "addi.n as, 0" will eventually be widened back to an "addi 0" | |
443 | after the widening table is applied. Note: The usage of this table | |
444 | has changed somewhat so that it is entirely specific to "narrowing" | |
445 | instructions to use the density option. This table is not used at | |
446 | all when the density option is not available. */ | |
447 | ||
448 | string_pattern_pair simplify_spec_list[] = | |
449 | { | |
43cd72b9 BW |
450 | {"add %ar,%as,%at ? IsaUseDensityInstruction", "add.n %ar,%as,%at"}, |
451 | {"addi.n %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, | |
452 | {"addi %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, | |
453 | {"addi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, | |
454 | {"addmi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, | |
455 | {"beqz %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%label"}, | |
456 | {"bnez %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%label"}, | |
457 | {"l32i %at,%as,%imm ? IsaUseDensityInstruction", "l32i.n %at,%as,%imm"}, | |
458 | {"movi %as,%imm ? IsaUseDensityInstruction", "movi.n %as,%imm"}, | |
459 | {"nop ? realnop ? IsaUseDensityInstruction", "nop.n"}, | |
460 | {"or %ar,%as,%at | %ar==%as | %as==%at ? IsaUseDensityInstruction", "nop.n"}, | |
461 | {"or %ar,%as,%at | %ar!=%as | %as==%at ? IsaUseDensityInstruction", "mov.n %ar,%as"}, | |
462 | {"ret %as ? IsaUseDensityInstruction", "ret.n %as"}, | |
463 | {"retw %as ? IsaUseDensityInstruction", "retw.n %as"}, | |
464 | {"s32i %at,%as,%imm ? IsaUseDensityInstruction", "s32i.n %at,%as,%imm"}, | |
465 | {"slli %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"} | |
e0001a05 NC |
466 | }; |
467 | ||
468 | #define SIMPLIFY_COUNT \ | |
469 | (sizeof (simplify_spec_list) / sizeof (string_pattern_pair)) | |
470 | ||
471 | \f | |
e0001a05 NC |
472 | /* Externally visible functions. */ |
473 | ||
7fa3d080 BW |
474 | extern bfd_boolean xg_has_userdef_op_fn (OpType); |
475 | extern long xg_apply_userdef_op_fn (OpType, long); | |
e0001a05 | 476 | |
7fa3d080 BW |
477 | |
478 | static void | |
479 | append_transition (TransitionTable *tt, | |
480 | xtensa_opcode opcode, | |
481 | TransitionRule *t, | |
482 | transition_cmp_fn cmp) | |
e0001a05 NC |
483 | { |
484 | TransitionList *tl = (TransitionList *) xmalloc (sizeof (TransitionList)); | |
485 | TransitionList *prev; | |
43cd72b9 | 486 | TransitionList **t_p; |
e0001a05 NC |
487 | assert (tt != NULL); |
488 | assert (opcode < tt->num_opcodes); | |
489 | ||
490 | prev = tt->table[opcode]; | |
491 | tl->rule = t; | |
492 | tl->next = NULL; | |
493 | if (prev == NULL) | |
494 | { | |
495 | tt->table[opcode] = tl; | |
496 | return; | |
497 | } | |
43cd72b9 BW |
498 | |
499 | for (t_p = &tt->table[opcode]; (*t_p) != NULL; t_p = &(*t_p)->next) | |
e0001a05 | 500 | { |
43cd72b9 BW |
501 | if (cmp && cmp (t, (*t_p)->rule) < 0) |
502 | { | |
503 | /* Insert it here. */ | |
504 | tl->next = *t_p; | |
505 | *t_p = tl; | |
506 | return; | |
507 | } | |
e0001a05 | 508 | } |
43cd72b9 | 509 | (*t_p) = tl; |
e0001a05 NC |
510 | } |
511 | ||
512 | ||
7fa3d080 BW |
513 | static void |
514 | append_condition (TransitionRule *tr, Precondition *cond) | |
e0001a05 NC |
515 | { |
516 | PreconditionList *pl = | |
517 | (PreconditionList *) xmalloc (sizeof (PreconditionList)); | |
518 | PreconditionList *prev = tr->conditions; | |
519 | PreconditionList *nxt; | |
520 | ||
521 | pl->precond = cond; | |
522 | pl->next = NULL; | |
523 | if (prev == NULL) | |
524 | { | |
525 | tr->conditions = pl; | |
526 | return; | |
527 | } | |
528 | nxt = prev->next; | |
529 | while (nxt != NULL) | |
530 | { | |
531 | prev = nxt; | |
532 | nxt = nxt->next; | |
533 | } | |
534 | prev->next = pl; | |
535 | } | |
536 | ||
537 | ||
7fa3d080 BW |
538 | static void |
539 | append_value_condition (TransitionRule *tr, | |
540 | CmpOp cmp, | |
541 | unsigned op1, | |
542 | unsigned op2) | |
e0001a05 NC |
543 | { |
544 | Precondition *cond = (Precondition *) xmalloc (sizeof (Precondition)); | |
545 | ||
546 | cond->cmp = cmp; | |
547 | cond->op_num = op1; | |
548 | cond->typ = OP_OPERAND; | |
549 | cond->op_data = op2; | |
550 | append_condition (tr, cond); | |
551 | } | |
552 | ||
553 | ||
7fa3d080 BW |
554 | static void |
555 | append_constant_value_condition (TransitionRule *tr, | |
556 | CmpOp cmp, | |
557 | unsigned op1, | |
558 | unsigned cnst) | |
e0001a05 NC |
559 | { |
560 | Precondition *cond = (Precondition *) xmalloc (sizeof (Precondition)); | |
561 | ||
562 | cond->cmp = cmp; | |
563 | cond->op_num = op1; | |
564 | cond->typ = OP_CONSTANT; | |
565 | cond->op_data = cnst; | |
566 | append_condition (tr, cond); | |
567 | } | |
568 | ||
569 | ||
7fa3d080 BW |
570 | static void |
571 | append_build_insn (TransitionRule *tr, BuildInstr *bi) | |
e0001a05 NC |
572 | { |
573 | BuildInstr *prev = tr->to_instr; | |
574 | BuildInstr *nxt; | |
575 | ||
576 | bi->next = NULL; | |
577 | if (prev == NULL) | |
578 | { | |
579 | tr->to_instr = bi; | |
580 | return; | |
581 | } | |
582 | nxt = prev->next; | |
583 | while (nxt != 0) | |
584 | { | |
585 | prev = nxt; | |
586 | nxt = prev->next; | |
587 | } | |
588 | prev->next = bi; | |
589 | } | |
590 | ||
591 | ||
7fa3d080 BW |
592 | static void |
593 | append_op (BuildInstr *bi, BuildOp *b_op) | |
e0001a05 NC |
594 | { |
595 | BuildOp *prev = bi->ops; | |
596 | BuildOp *nxt; | |
597 | ||
598 | if (prev == NULL) | |
599 | { | |
600 | bi->ops = b_op; | |
601 | return; | |
602 | } | |
603 | nxt = prev->next; | |
604 | while (nxt != NULL) | |
605 | { | |
606 | prev = nxt; | |
607 | nxt = nxt->next; | |
608 | } | |
609 | prev->next = b_op; | |
610 | } | |
611 | ||
612 | ||
7fa3d080 BW |
613 | static void |
614 | append_literal_op (BuildInstr *bi, unsigned op1, unsigned litnum) | |
e0001a05 NC |
615 | { |
616 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
617 | ||
618 | b_op->op_num = op1; | |
619 | b_op->typ = OP_LITERAL; | |
620 | b_op->op_data = litnum; | |
621 | b_op->next = NULL; | |
622 | append_op (bi, b_op); | |
623 | } | |
624 | ||
625 | ||
7fa3d080 BW |
626 | static void |
627 | append_label_op (BuildInstr *bi, unsigned op1, unsigned labnum) | |
e0001a05 NC |
628 | { |
629 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
630 | ||
631 | b_op->op_num = op1; | |
632 | b_op->typ = OP_LABEL; | |
633 | b_op->op_data = labnum; | |
634 | b_op->next = NULL; | |
635 | append_op (bi, b_op); | |
636 | } | |
637 | ||
638 | ||
7fa3d080 BW |
639 | static void |
640 | append_constant_op (BuildInstr *bi, unsigned op1, unsigned cnst) | |
e0001a05 NC |
641 | { |
642 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
643 | ||
644 | b_op->op_num = op1; | |
645 | b_op->typ = OP_CONSTANT; | |
646 | b_op->op_data = cnst; | |
647 | b_op->next = NULL; | |
648 | append_op (bi, b_op); | |
649 | } | |
650 | ||
651 | ||
7fa3d080 BW |
652 | static void |
653 | append_field_op (BuildInstr *bi, unsigned op1, unsigned src_op) | |
e0001a05 NC |
654 | { |
655 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
656 | ||
657 | b_op->op_num = op1; | |
658 | b_op->typ = OP_OPERAND; | |
659 | b_op->op_data = src_op; | |
660 | b_op->next = NULL; | |
661 | append_op (bi, b_op); | |
662 | } | |
663 | ||
664 | ||
665 | /* These could be generated but are not currently. */ | |
666 | ||
7fa3d080 BW |
667 | static void |
668 | append_user_fn_field_op (BuildInstr *bi, | |
669 | unsigned op1, | |
670 | OpType typ, | |
671 | unsigned src_op) | |
e0001a05 NC |
672 | { |
673 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); | |
674 | ||
675 | b_op->op_num = op1; | |
676 | b_op->typ = typ; | |
677 | b_op->op_data = src_op; | |
678 | b_op->next = NULL; | |
679 | append_op (bi, b_op); | |
680 | } | |
681 | ||
682 | ||
683 | /* These operand functions are the semantics of user-defined | |
684 | operand functions. */ | |
685 | ||
7fa3d080 BW |
686 | static long |
687 | operand_function_HI24S (long a) | |
e0001a05 NC |
688 | { |
689 | if (a & 0x80) | |
690 | return (a & (~0xff)) + 0x100; | |
691 | else | |
692 | return (a & (~0xff)); | |
693 | } | |
694 | ||
695 | ||
7fa3d080 BW |
696 | static long |
697 | operand_function_F32MINUS (long a) | |
e0001a05 NC |
698 | { |
699 | return (32 - a); | |
700 | } | |
701 | ||
702 | ||
7fa3d080 BW |
703 | static long |
704 | operand_function_LOW8 (long a) | |
e0001a05 NC |
705 | { |
706 | if (a & 0x80) | |
707 | return (a & 0xff) | ~0xff; | |
708 | else | |
709 | return (a & 0xff); | |
710 | } | |
711 | ||
712 | ||
7fa3d080 BW |
713 | static long |
714 | operand_function_LOW16U (long a) | |
43cd72b9 BW |
715 | { |
716 | return (a & 0xffff); | |
717 | } | |
718 | ||
719 | ||
7fa3d080 BW |
720 | static long |
721 | operand_function_HI16U (long a) | |
43cd72b9 BW |
722 | { |
723 | unsigned long b = a & 0xffff0000; | |
724 | return (long) (b >> 16); | |
725 | } | |
726 | ||
727 | ||
e0001a05 | 728 | bfd_boolean |
7fa3d080 | 729 | xg_has_userdef_op_fn (OpType op) |
e0001a05 NC |
730 | { |
731 | switch (op) | |
732 | { | |
733 | case OP_OPERAND_F32MINUS: | |
734 | case OP_OPERAND_LOW8: | |
735 | case OP_OPERAND_HI24S: | |
43cd72b9 BW |
736 | case OP_OPERAND_LOW16U: |
737 | case OP_OPERAND_HI16U: | |
e0001a05 NC |
738 | return TRUE; |
739 | default: | |
740 | break; | |
741 | } | |
742 | return FALSE; | |
743 | } | |
744 | ||
745 | ||
746 | long | |
7fa3d080 | 747 | xg_apply_userdef_op_fn (OpType op, long a) |
e0001a05 NC |
748 | { |
749 | switch (op) | |
750 | { | |
751 | case OP_OPERAND_F32MINUS: | |
752 | return operand_function_F32MINUS (a); | |
753 | case OP_OPERAND_LOW8: | |
754 | return operand_function_LOW8 (a); | |
755 | case OP_OPERAND_HI24S: | |
756 | return operand_function_HI24S (a); | |
43cd72b9 BW |
757 | case OP_OPERAND_LOW16U: |
758 | return operand_function_LOW16U (a); | |
759 | case OP_OPERAND_HI16U: | |
760 | return operand_function_HI16U (a); | |
e0001a05 NC |
761 | default: |
762 | break; | |
763 | } | |
764 | return FALSE; | |
765 | } | |
766 | ||
767 | ||
768 | /* Generate a transition table. */ | |
769 | ||
7fa3d080 BW |
770 | static const char * |
771 | enter_opname_n (const char *name, int len) | |
e0001a05 NC |
772 | { |
773 | opname_e *op; | |
774 | ||
775 | for (op = local_opnames; op != NULL; op = op->next) | |
776 | { | |
43cd72b9 BW |
777 | if (strlen (op->opname) == (unsigned) len |
778 | && strncmp (op->opname, name, len) == 0) | |
e0001a05 NC |
779 | return op->opname; |
780 | } | |
781 | op = (opname_e *) xmalloc (sizeof (opname_e)); | |
782 | op->opname = (char *) xmalloc (len + 1); | |
783 | strncpy (op->opname, name, len); | |
784 | op->opname[len] = '\0'; | |
785 | return op->opname; | |
786 | } | |
787 | ||
788 | ||
789 | static const char * | |
7fa3d080 | 790 | enter_opname (const char *name) |
e0001a05 NC |
791 | { |
792 | opname_e *op; | |
793 | ||
794 | for (op = local_opnames; op != NULL; op = op->next) | |
795 | { | |
796 | if (strcmp (op->opname, name) == 0) | |
797 | return op->opname; | |
798 | } | |
799 | op = (opname_e *) xmalloc (sizeof (opname_e)); | |
43cd72b9 | 800 | op->opname = xstrdup (name); |
e0001a05 NC |
801 | return op->opname; |
802 | } | |
803 | ||
804 | ||
7fa3d080 BW |
805 | static void |
806 | init_opname_map (opname_map *m) | |
e0001a05 NC |
807 | { |
808 | m->head = NULL; | |
809 | m->tail = &m->head; | |
810 | } | |
811 | ||
812 | ||
7fa3d080 BW |
813 | static void |
814 | clear_opname_map (opname_map *m) | |
e0001a05 NC |
815 | { |
816 | opname_map_e *e; | |
817 | ||
818 | while (m->head != NULL) | |
819 | { | |
820 | e = m->head; | |
821 | m->head = e->next; | |
822 | free (e); | |
823 | } | |
824 | m->tail = &m->head; | |
825 | } | |
826 | ||
827 | ||
828 | static bfd_boolean | |
7fa3d080 | 829 | same_operand_name (const opname_map_e *m1, const opname_map_e *m2) |
e0001a05 NC |
830 | { |
831 | if (m1->operand_name == NULL || m1->operand_name == NULL) | |
832 | return FALSE; | |
833 | return (m1->operand_name == m2->operand_name); | |
834 | } | |
835 | ||
836 | ||
7fa3d080 BW |
837 | static opname_map_e * |
838 | get_opmatch (opname_map *map, const char *operand_name) | |
e0001a05 NC |
839 | { |
840 | opname_map_e *m; | |
841 | ||
842 | for (m = map->head; m != NULL; m = m->next) | |
843 | { | |
844 | if (strcmp (m->operand_name, operand_name) == 0) | |
845 | return m; | |
846 | } | |
847 | return NULL; | |
848 | } | |
849 | ||
850 | ||
7fa3d080 BW |
851 | static bfd_boolean |
852 | op_is_constant (const opname_map_e *m1) | |
e0001a05 NC |
853 | { |
854 | return (m1->operand_name == NULL); | |
855 | } | |
856 | ||
857 | ||
858 | static unsigned | |
7fa3d080 | 859 | op_get_constant (const opname_map_e *m1) |
e0001a05 NC |
860 | { |
861 | assert (m1->operand_name == NULL); | |
862 | return m1->constant_value; | |
863 | } | |
864 | ||
865 | ||
7fa3d080 BW |
866 | static void |
867 | init_precond_list (precond_list *l) | |
e0001a05 NC |
868 | { |
869 | l->head = NULL; | |
870 | l->tail = &l->head; | |
871 | } | |
872 | ||
873 | ||
7fa3d080 BW |
874 | static void |
875 | clear_precond_list (precond_list *l) | |
e0001a05 NC |
876 | { |
877 | precond_e *e; | |
878 | ||
879 | while (l->head != NULL) | |
880 | { | |
881 | e = l->head; | |
882 | l->head = e->next; | |
883 | free (e); | |
884 | } | |
885 | l->tail = &l->head; | |
886 | } | |
887 | ||
888 | ||
7fa3d080 BW |
889 | static void |
890 | init_insn_templ (insn_templ *t) | |
e0001a05 NC |
891 | { |
892 | t->opcode_name = NULL; | |
893 | init_opname_map (&t->operand_map); | |
894 | } | |
895 | ||
896 | ||
7fa3d080 BW |
897 | static void |
898 | clear_insn_templ (insn_templ *t) | |
e0001a05 NC |
899 | { |
900 | clear_opname_map (&t->operand_map); | |
901 | } | |
902 | ||
903 | ||
7fa3d080 BW |
904 | static void |
905 | init_insn_pattern (insn_pattern *p) | |
e0001a05 NC |
906 | { |
907 | init_insn_templ (&p->t); | |
908 | init_precond_list (&p->preconds); | |
43cd72b9 | 909 | p->options = NULL; |
e0001a05 NC |
910 | } |
911 | ||
912 | ||
7fa3d080 BW |
913 | static void |
914 | clear_insn_pattern (insn_pattern *p) | |
e0001a05 NC |
915 | { |
916 | clear_insn_templ (&p->t); | |
917 | clear_precond_list (&p->preconds); | |
918 | } | |
919 | ||
920 | ||
7fa3d080 BW |
921 | static void |
922 | init_insn_repl (insn_repl *r) | |
e0001a05 NC |
923 | { |
924 | r->head = NULL; | |
925 | r->tail = &r->head; | |
926 | } | |
927 | ||
928 | ||
7fa3d080 BW |
929 | static void |
930 | clear_insn_repl (insn_repl *r) | |
e0001a05 NC |
931 | { |
932 | insn_repl_e *e; | |
933 | ||
934 | while (r->head != NULL) | |
935 | { | |
936 | e = r->head; | |
937 | r->head = e->next; | |
938 | clear_insn_templ (&e->t); | |
939 | } | |
940 | r->tail = &r->head; | |
941 | } | |
942 | ||
943 | ||
43cd72b9 | 944 | static int |
7fa3d080 | 945 | insn_templ_operand_count (const insn_templ *t) |
e0001a05 | 946 | { |
43cd72b9 | 947 | int i = 0; |
e0001a05 NC |
948 | const opname_map_e *op; |
949 | ||
43cd72b9 | 950 | for (op = t->operand_map.head; op != NULL; op = op->next, i++) |
e0001a05 NC |
951 | ; |
952 | return i; | |
953 | } | |
954 | ||
955 | ||
956 | /* Convert a string to a number. E.G.: parse_constant("10", &num) */ | |
957 | ||
7fa3d080 BW |
958 | static bfd_boolean |
959 | parse_constant (const char *in, unsigned *val_p) | |
e0001a05 NC |
960 | { |
961 | unsigned val = 0; | |
962 | const char *p; | |
963 | ||
964 | if (in == NULL) | |
965 | return FALSE; | |
966 | p = in; | |
967 | ||
968 | while (*p != '\0') | |
969 | { | |
970 | if (*p >= '0' && *p <= '9') | |
971 | val = val * 10 + (*p - '0'); | |
972 | else | |
973 | return FALSE; | |
974 | ++p; | |
975 | } | |
976 | *val_p = val; | |
977 | return TRUE; | |
978 | } | |
979 | ||
980 | ||
981 | /* Match a pattern like "foo1" with | |
982 | parse_id_constant("foo1", "foo", &num). | |
983 | This may also be used to just match a number. */ | |
984 | ||
7fa3d080 BW |
985 | static bfd_boolean |
986 | parse_id_constant (const char *in, const char *name, unsigned *val_p) | |
e0001a05 NC |
987 | { |
988 | unsigned namelen = 0; | |
989 | const char *p; | |
990 | ||
991 | if (in == NULL) | |
992 | return FALSE; | |
993 | ||
994 | if (name != NULL) | |
995 | namelen = strlen (name); | |
996 | ||
997 | if (name != NULL && strncmp (in, name, namelen) != 0) | |
998 | return FALSE; | |
999 | ||
1000 | p = &in[namelen]; | |
1001 | return parse_constant (p, val_p); | |
1002 | } | |
1003 | ||
1004 | ||
1005 | static bfd_boolean | |
7fa3d080 BW |
1006 | parse_special_fn (const char *name, |
1007 | const char **fn_name_p, | |
1008 | const char **arg_name_p) | |
e0001a05 NC |
1009 | { |
1010 | char *p_start; | |
1011 | const char *p_end; | |
1012 | ||
1013 | p_start = strchr (name, '('); | |
1014 | if (p_start == NULL) | |
1015 | return FALSE; | |
1016 | ||
1017 | p_end = strchr (p_start, ')'); | |
1018 | ||
1019 | if (p_end == NULL) | |
1020 | return FALSE; | |
1021 | ||
1022 | if (p_end[1] != '\0') | |
1023 | return FALSE; | |
1024 | ||
1025 | *fn_name_p = enter_opname_n (name, p_start - name); | |
1026 | *arg_name_p = enter_opname_n (p_start + 1, p_end - p_start - 1); | |
1027 | return TRUE; | |
1028 | } | |
1029 | ||
1030 | ||
7fa3d080 BW |
1031 | static const char * |
1032 | skip_white (const char *p) | |
e0001a05 NC |
1033 | { |
1034 | if (p == NULL) | |
1035 | return p; | |
1036 | while (*p == ' ') | |
1037 | ++p; | |
1038 | return p; | |
1039 | } | |
1040 | ||
1041 | ||
7fa3d080 BW |
1042 | static void |
1043 | trim_whitespace (char *in) | |
e0001a05 NC |
1044 | { |
1045 | char *last_white = NULL; | |
1046 | char *p = in; | |
1047 | ||
1048 | while (p && *p != '\0') | |
1049 | { | |
1050 | while (*p == ' ') | |
1051 | { | |
1052 | if (last_white == NULL) | |
1053 | last_white = p; | |
1054 | p++; | |
1055 | } | |
1056 | if (*p != '\0') | |
1057 | { | |
1058 | last_white = NULL; | |
1059 | p++; | |
1060 | } | |
1061 | } | |
1062 | if (last_white) | |
1063 | *last_white = '\0'; | |
1064 | } | |
1065 | ||
1066 | ||
1067 | /* Split a string into component strings where "c" is the | |
1068 | delimiter. Place the result in the split_rec. */ | |
1069 | ||
7fa3d080 BW |
1070 | static void |
1071 | split_string (split_rec *rec, | |
1072 | const char *in, | |
1073 | char c, | |
1074 | bfd_boolean elide_whitespace) | |
e0001a05 | 1075 | { |
43cd72b9 BW |
1076 | int cnt = 0; |
1077 | int i; | |
e0001a05 NC |
1078 | const char *p = in; |
1079 | ||
1080 | while (p != NULL && *p != '\0') | |
1081 | { | |
1082 | cnt++; | |
1083 | p = strchr (p, c); | |
1084 | if (p) | |
1085 | p++; | |
1086 | } | |
1087 | rec->count = cnt; | |
1088 | rec->vec = NULL; | |
1089 | ||
1090 | if (rec->count == 0) | |
1091 | return; | |
1092 | ||
1093 | rec->vec = (char **) xmalloc (sizeof (char *) * cnt); | |
1094 | for (i = 0; i < cnt; i++) | |
1095 | rec->vec[i] = 0; | |
1096 | ||
1097 | p = in; | |
1098 | for (i = 0; i < cnt; i++) | |
1099 | { | |
1100 | const char *q; | |
43cd72b9 | 1101 | int len; |
e0001a05 NC |
1102 | |
1103 | q = p; | |
1104 | if (elide_whitespace) | |
1105 | q = skip_white (q); | |
1106 | ||
1107 | p = strchr (q, c); | |
1108 | if (p == NULL) | |
43cd72b9 | 1109 | rec->vec[i] = xstrdup (q); |
e0001a05 NC |
1110 | else |
1111 | { | |
1112 | len = p - q; | |
1113 | rec->vec[i] = (char *) xmalloc (sizeof (char) * (len + 1)); | |
1114 | strncpy (rec->vec[i], q, len); | |
1115 | rec->vec[i][len] = '\0'; | |
1116 | p++; | |
1117 | } | |
1118 | ||
1119 | if (elide_whitespace) | |
1120 | trim_whitespace (rec->vec[i]); | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | ||
7fa3d080 BW |
1125 | static void |
1126 | clear_split_rec (split_rec *rec) | |
e0001a05 | 1127 | { |
43cd72b9 | 1128 | int i; |
e0001a05 | 1129 | |
43cd72b9 | 1130 | for (i = 0; i < rec->count; i++) |
e0001a05 NC |
1131 | free (rec->vec[i]); |
1132 | ||
1133 | if (rec->count > 0) | |
1134 | free (rec->vec); | |
1135 | } | |
1136 | ||
1137 | ||
43cd72b9 BW |
1138 | /* Initialize a split record. The split record must be initialized |
1139 | before split_string is called. */ | |
1140 | ||
7fa3d080 BW |
1141 | static void |
1142 | init_split_rec (split_rec *rec) | |
e0001a05 NC |
1143 | { |
1144 | rec->vec = NULL; | |
1145 | rec->count = 0; | |
1146 | } | |
1147 | ||
1148 | ||
1149 | /* Parse an instruction template like "insn op1, op2, op3". */ | |
1150 | ||
7fa3d080 BW |
1151 | static bfd_boolean |
1152 | parse_insn_templ (const char *s, insn_templ *t) | |
e0001a05 NC |
1153 | { |
1154 | const char *p = s; | |
43cd72b9 | 1155 | int insn_name_len; |
e0001a05 | 1156 | split_rec oprec; |
43cd72b9 BW |
1157 | int i; |
1158 | ||
1159 | /* First find the first whitespace. */ | |
e0001a05 NC |
1160 | |
1161 | init_split_rec (&oprec); | |
1162 | ||
1163 | p = skip_white (p); | |
1164 | insn_name_len = strcspn (s, " "); | |
1165 | if (insn_name_len == 0) | |
1166 | return FALSE; | |
1167 | ||
1168 | init_insn_templ (t); | |
1169 | t->opcode_name = enter_opname_n (p, insn_name_len); | |
1170 | ||
1171 | p = p + insn_name_len; | |
1172 | ||
1173 | /* Split by ',' and skip beginning and trailing whitespace. */ | |
1174 | split_string (&oprec, p, ',', TRUE); | |
1175 | ||
1176 | for (i = 0; i < oprec.count; i++) | |
1177 | { | |
1178 | const char *opname = oprec.vec[i]; | |
1179 | opname_map_e *e = (opname_map_e *) xmalloc (sizeof (opname_map_e)); | |
1180 | e->next = NULL; | |
1181 | e->operand_name = NULL; | |
1182 | e->constant_value = 0; | |
1183 | e->operand_num = i; | |
1184 | ||
1185 | /* If it begins with a number, assume that it is a number. */ | |
1186 | if (opname && opname[0] >= '0' && opname[0] <= '9') | |
1187 | { | |
1188 | unsigned val; | |
1189 | ||
1190 | if (parse_constant (opname, &val)) | |
1191 | e->constant_value = val; | |
1192 | else | |
1193 | { | |
1194 | free (e); | |
1195 | clear_split_rec (&oprec); | |
1196 | clear_insn_templ (t); | |
1197 | return FALSE; | |
1198 | } | |
1199 | } | |
1200 | else | |
1201 | e->operand_name = enter_opname (oprec.vec[i]); | |
1202 | ||
1203 | *t->operand_map.tail = e; | |
1204 | t->operand_map.tail = &e->next; | |
1205 | } | |
1206 | clear_split_rec (&oprec); | |
1207 | return TRUE; | |
1208 | } | |
1209 | ||
1210 | ||
7fa3d080 BW |
1211 | static bfd_boolean |
1212 | parse_precond (const char *s, precond_e *precond) | |
e0001a05 NC |
1213 | { |
1214 | /* All preconditions are currently of the form: | |
1215 | a == b or a != b or a == k (where k is a constant). | |
1216 | Later we may use some special functions like DENSITY == 1 | |
1217 | to identify when density is available. */ | |
1218 | ||
1219 | const char *p = s; | |
43cd72b9 | 1220 | int len; |
e0001a05 NC |
1221 | precond->opname1 = NULL; |
1222 | precond->opval1 = 0; | |
1223 | precond->cmpop = OP_EQUAL; | |
1224 | precond->opname2 = NULL; | |
1225 | precond->opval2 = 0; | |
1226 | precond->next = NULL; | |
1227 | ||
1228 | p = skip_white (p); | |
1229 | ||
1230 | len = strcspn (p, " !="); | |
1231 | ||
1232 | if (len == 0) | |
1233 | return FALSE; | |
1234 | ||
1235 | precond->opname1 = enter_opname_n (p, len); | |
1236 | p = p + len; | |
1237 | p = skip_white (p); | |
1238 | ||
1239 | /* Check for "==" and "!=". */ | |
1240 | if (strncmp (p, "==", 2) == 0) | |
1241 | precond->cmpop = OP_EQUAL; | |
1242 | else if (strncmp (p, "!=", 2) == 0) | |
1243 | precond->cmpop = OP_NOTEQUAL; | |
1244 | else | |
1245 | return FALSE; | |
1246 | ||
1247 | p = p + 2; | |
1248 | p = skip_white (p); | |
1249 | ||
1250 | /* No trailing whitespace from earlier parsing. */ | |
1251 | if (p[0] >= '0' && p[0] <= '9') | |
1252 | { | |
1253 | unsigned val; | |
1254 | if (parse_constant (p, &val)) | |
1255 | precond->opval2 = val; | |
1256 | else | |
1257 | return FALSE; | |
1258 | } | |
1259 | else | |
1260 | precond->opname2 = enter_opname (p); | |
1261 | return TRUE; | |
1262 | } | |
1263 | ||
1264 | ||
7fa3d080 BW |
1265 | static void |
1266 | clear_req_or_option_list (ReqOrOption **r_p) | |
43cd72b9 BW |
1267 | { |
1268 | if (*r_p == NULL) | |
1269 | return; | |
1270 | ||
1271 | free ((*r_p)->option_name); | |
1272 | clear_req_or_option_list (&(*r_p)->next); | |
1273 | *r_p = NULL; | |
1274 | } | |
1275 | ||
1276 | ||
7fa3d080 BW |
1277 | static void |
1278 | clear_req_option_list (ReqOption **r_p) | |
43cd72b9 BW |
1279 | { |
1280 | if (*r_p == NULL) | |
1281 | return; | |
1282 | ||
1283 | clear_req_or_option_list (&(*r_p)->or_option_terms); | |
1284 | clear_req_option_list (&(*r_p)->next); | |
1285 | *r_p = NULL; | |
1286 | } | |
1287 | ||
1288 | ||
7fa3d080 BW |
1289 | static ReqOrOption * |
1290 | clone_req_or_option_list (ReqOrOption *req_or_option) | |
43cd72b9 BW |
1291 | { |
1292 | ReqOrOption *new_req_or_option; | |
1293 | ||
1294 | if (req_or_option == NULL) | |
1295 | return NULL; | |
1296 | ||
1297 | new_req_or_option = (ReqOrOption *) xmalloc (sizeof (ReqOrOption)); | |
1298 | new_req_or_option->option_name = xstrdup (req_or_option->option_name); | |
1299 | new_req_or_option->is_true = req_or_option->is_true; | |
1300 | new_req_or_option->next = NULL; | |
1301 | new_req_or_option->next = clone_req_or_option_list (req_or_option->next); | |
1302 | return new_req_or_option; | |
1303 | } | |
1304 | ||
1305 | ||
7fa3d080 BW |
1306 | static ReqOption * |
1307 | clone_req_option_list (ReqOption *req_option) | |
43cd72b9 BW |
1308 | { |
1309 | ReqOption *new_req_option; | |
1310 | ||
1311 | if (req_option == NULL) | |
1312 | return NULL; | |
1313 | ||
1314 | new_req_option = (ReqOption *) xmalloc (sizeof (ReqOption)); | |
1315 | new_req_option->or_option_terms = NULL; | |
1316 | new_req_option->next = NULL; | |
c138bc38 | 1317 | new_req_option->or_option_terms = |
43cd72b9 BW |
1318 | clone_req_or_option_list (req_option->or_option_terms); |
1319 | new_req_option->next = clone_req_option_list (req_option->next); | |
1320 | return new_req_option; | |
1321 | } | |
1322 | ||
1323 | ||
7fa3d080 BW |
1324 | static bfd_boolean |
1325 | parse_option_cond (const char *s, ReqOption *option) | |
43cd72b9 BW |
1326 | { |
1327 | int i; | |
1328 | split_rec option_term_rec; | |
1329 | ||
1330 | /* All option or conditions are of the form: | |
1331 | optionA + no-optionB + ... | |
1332 | "Ands" are divided by "?". */ | |
1333 | ||
1334 | init_split_rec (&option_term_rec); | |
1335 | split_string (&option_term_rec, s, '+', TRUE); | |
1336 | ||
1337 | if (option_term_rec.count == 0) | |
1338 | { | |
1339 | clear_split_rec (&option_term_rec); | |
1340 | return FALSE; | |
1341 | } | |
1342 | ||
1343 | for (i = 0; i < option_term_rec.count; i++) | |
1344 | { | |
1345 | char *option_name = option_term_rec.vec[i]; | |
1346 | bfd_boolean is_true = TRUE; | |
1347 | ReqOrOption *req; | |
1348 | ReqOrOption **r_p; | |
1349 | ||
1350 | if (strncmp (option_name, "no-", 3) == 0) | |
1351 | { | |
1352 | option_name = xstrdup (&option_name[3]); | |
1353 | is_true = FALSE; | |
1354 | } | |
1355 | else | |
1356 | option_name = xstrdup (option_name); | |
1357 | ||
1358 | req = (ReqOrOption *) xmalloc (sizeof (ReqOrOption)); | |
1359 | req->option_name = option_name; | |
1360 | req->is_true = is_true; | |
1361 | req->next = NULL; | |
1362 | ||
1363 | /* Append to list. */ | |
c138bc38 | 1364 | for (r_p = &option->or_option_terms; (*r_p) != NULL; |
43cd72b9 BW |
1365 | r_p = &(*r_p)->next) |
1366 | ; | |
1367 | (*r_p) = req; | |
1368 | } | |
1369 | return TRUE; | |
1370 | } | |
1371 | ||
1372 | ||
e0001a05 NC |
1373 | /* Parse a string like: |
1374 | "insn op1, op2, op3, op4 | op1 != op2 | op2 == op3 | op4 == 1". | |
1375 | I.E., instruction "insn" with 4 operands where operand 1 and 2 are not | |
43cd72b9 BW |
1376 | the same and operand 2 and 3 are the same and operand 4 is 1. |
1377 | ||
1378 | or: | |
1379 | ||
1380 | "insn op1 | op1 == 1 / density + boolean / no-useroption". | |
1381 | i.e. instruction "insn" with 1 operands where operand 1 is 1 | |
1382 | when "density" or "boolean" options are available and | |
1383 | "useroption" is not available. | |
1384 | ||
1385 | Because the current implementation of this parsing scheme uses | |
1386 | split_string, it requires that '|' and '?' are only used as | |
1387 | delimiters for predicates and required options. */ | |
e0001a05 | 1388 | |
7fa3d080 BW |
1389 | static bfd_boolean |
1390 | parse_insn_pattern (const char *in, insn_pattern *insn) | |
e0001a05 | 1391 | { |
e0001a05 | 1392 | split_rec rec; |
43cd72b9 BW |
1393 | split_rec optionrec; |
1394 | int i; | |
e0001a05 | 1395 | |
e0001a05 NC |
1396 | init_insn_pattern (insn); |
1397 | ||
43cd72b9 BW |
1398 | init_split_rec (&optionrec); |
1399 | split_string (&optionrec, in, '?', TRUE); | |
1400 | if (optionrec.count == 0) | |
1401 | { | |
1402 | clear_split_rec (&optionrec); | |
1403 | return FALSE; | |
1404 | } | |
c138bc38 | 1405 | |
43cd72b9 BW |
1406 | init_split_rec (&rec); |
1407 | ||
1408 | split_string (&rec, optionrec.vec[0], '|', TRUE); | |
e0001a05 NC |
1409 | |
1410 | if (rec.count == 0) | |
1411 | { | |
1412 | clear_split_rec (&rec); | |
43cd72b9 | 1413 | clear_split_rec (&optionrec); |
e0001a05 NC |
1414 | return FALSE; |
1415 | } | |
1416 | ||
1417 | if (!parse_insn_templ (rec.vec[0], &insn->t)) | |
1418 | { | |
1419 | clear_split_rec (&rec); | |
43cd72b9 | 1420 | clear_split_rec (&optionrec); |
e0001a05 NC |
1421 | return FALSE; |
1422 | } | |
1423 | ||
1424 | for (i = 1; i < rec.count; i++) | |
1425 | { | |
1426 | precond_e *cond = (precond_e *) xmalloc (sizeof (precond_e)); | |
1427 | ||
1428 | if (!parse_precond (rec.vec[i], cond)) | |
1429 | { | |
1430 | clear_split_rec (&rec); | |
43cd72b9 | 1431 | clear_split_rec (&optionrec); |
e0001a05 NC |
1432 | clear_insn_pattern (insn); |
1433 | return FALSE; | |
1434 | } | |
1435 | ||
1436 | /* Append the condition. */ | |
1437 | *insn->preconds.tail = cond; | |
1438 | insn->preconds.tail = &cond->next; | |
1439 | } | |
1440 | ||
43cd72b9 BW |
1441 | for (i = 1; i < optionrec.count; i++) |
1442 | { | |
1443 | /* Handle the option conditions. */ | |
1444 | ReqOption **r_p; | |
1445 | ReqOption *req_option = (ReqOption *) xmalloc (sizeof (ReqOption)); | |
1446 | req_option->or_option_terms = NULL; | |
1447 | req_option->next = NULL; | |
c138bc38 | 1448 | |
43cd72b9 BW |
1449 | if (!parse_option_cond (optionrec.vec[i], req_option)) |
1450 | { | |
1451 | clear_split_rec (&rec); | |
1452 | clear_split_rec (&optionrec); | |
1453 | clear_insn_pattern (insn); | |
1454 | clear_req_option_list (&req_option); | |
1455 | return FALSE; | |
1456 | } | |
1457 | ||
1458 | /* Append the condition. */ | |
1459 | for (r_p = &insn->options; (*r_p) != NULL; r_p = &(*r_p)->next) | |
1460 | ; | |
1461 | ||
1462 | (*r_p) = req_option; | |
1463 | } | |
1464 | ||
e0001a05 | 1465 | clear_split_rec (&rec); |
43cd72b9 | 1466 | clear_split_rec (&optionrec); |
e0001a05 NC |
1467 | return TRUE; |
1468 | } | |
1469 | ||
1470 | ||
7fa3d080 BW |
1471 | static bfd_boolean |
1472 | parse_insn_repl (const char *in, insn_repl *r_p) | |
e0001a05 NC |
1473 | { |
1474 | /* This is a list of instruction templates separated by ';'. */ | |
1475 | split_rec rec; | |
43cd72b9 | 1476 | int i; |
e0001a05 NC |
1477 | |
1478 | split_string (&rec, in, ';', TRUE); | |
1479 | ||
1480 | for (i = 0; i < rec.count; i++) | |
1481 | { | |
1482 | insn_repl_e *e = (insn_repl_e *) xmalloc (sizeof (insn_repl_e)); | |
1483 | ||
1484 | e->next = NULL; | |
1485 | ||
1486 | if (!parse_insn_templ (rec.vec[i], &e->t)) | |
1487 | { | |
1488 | free (e); | |
1489 | clear_insn_repl (r_p); | |
1490 | return FALSE; | |
1491 | } | |
1492 | *r_p->tail = e; | |
1493 | r_p->tail = &e->next; | |
1494 | } | |
1495 | return TRUE; | |
1496 | } | |
1497 | ||
1498 | ||
7fa3d080 BW |
1499 | static bfd_boolean |
1500 | transition_applies (insn_pattern *initial_insn, | |
1501 | const char *from_string ATTRIBUTE_UNUSED, | |
1502 | const char *to_string ATTRIBUTE_UNUSED) | |
43cd72b9 BW |
1503 | { |
1504 | ReqOption *req_option; | |
1505 | ||
1506 | for (req_option = initial_insn->options; | |
1507 | req_option != NULL; | |
1508 | req_option = req_option->next) | |
1509 | { | |
1510 | ReqOrOption *req_or_option = req_option->or_option_terms; | |
1511 | ||
1512 | if (req_or_option == NULL | |
1513 | || req_or_option->next != NULL) | |
1514 | continue; | |
1515 | ||
c138bc38 | 1516 | if (strncmp (req_or_option->option_name, "IsaUse", 6) == 0) |
43cd72b9 BW |
1517 | { |
1518 | bfd_boolean option_available = FALSE; | |
1519 | char *option_name = req_or_option->option_name + 6; | |
1520 | if (!strcmp (option_name, "DensityInstruction")) | |
1521 | option_available = (XCHAL_HAVE_DENSITY == 1); | |
1522 | else if (!strcmp (option_name, "L32R")) | |
1523 | option_available = (XCHAL_HAVE_L32R == 1); | |
1524 | else if (!strcmp (option_name, "Const16")) | |
1525 | option_available = (XCHAL_HAVE_CONST16 == 1); | |
1526 | else if (!strcmp (option_name, "Loops")) | |
1527 | option_available = (XCHAL_HAVE_LOOPS == 1); | |
b2d179be BW |
1528 | else if (!strcmp (option_name, "WideBranches")) |
1529 | option_available = (XCHAL_HAVE_WIDE_BRANCHES == 1); | |
43cd72b9 BW |
1530 | else if (!strcmp (option_name, "PredictedBranches")) |
1531 | option_available = (XCHAL_HAVE_PREDICTED_BRANCHES == 1); | |
1532 | else if (!strcmp (option_name, "Booleans")) | |
1533 | option_available = (XCHAL_HAVE_BOOLEANS == 1); | |
1534 | else | |
1535 | as_warn (_("invalid configuration option '%s' in transition rule '%s'"), | |
1536 | req_or_option->option_name, from_string); | |
1537 | if ((option_available ^ req_or_option->is_true) != 0) | |
1538 | return FALSE; | |
1539 | } | |
1540 | else if (strcmp (req_or_option->option_name, "realnop") == 0) | |
1541 | { | |
c138bc38 | 1542 | bfd_boolean nop_available = |
43cd72b9 BW |
1543 | (xtensa_opcode_lookup (xtensa_default_isa, "nop") |
1544 | != XTENSA_UNDEFINED); | |
1545 | if ((nop_available ^ req_or_option->is_true) != 0) | |
1546 | return FALSE; | |
1547 | } | |
1548 | } | |
1549 | return TRUE; | |
1550 | } | |
1551 | ||
1552 | ||
7fa3d080 BW |
1553 | static TransitionRule * |
1554 | build_transition (insn_pattern *initial_insn, | |
1555 | insn_repl *replace_insns, | |
1556 | const char *from_string, | |
1557 | const char *to_string) | |
e0001a05 NC |
1558 | { |
1559 | TransitionRule *tr = NULL; | |
1560 | xtensa_opcode opcode; | |
1561 | xtensa_isa isa = xtensa_default_isa; | |
1562 | ||
1563 | opname_map_e *op1; | |
1564 | opname_map_e *op2; | |
1565 | ||
1566 | precond_e *precond; | |
1567 | insn_repl_e *r; | |
1568 | unsigned label_count = 0; | |
1569 | unsigned max_label_count = 0; | |
1570 | bfd_boolean has_label = FALSE; | |
1571 | unsigned literal_count = 0; | |
1572 | ||
1573 | opcode = xtensa_opcode_lookup (isa, initial_insn->t.opcode_name); | |
1574 | if (opcode == XTENSA_UNDEFINED) | |
1575 | { | |
1576 | /* It is OK to not be able to translate some of these opcodes. */ | |
e0001a05 NC |
1577 | return NULL; |
1578 | } | |
1579 | ||
1580 | ||
43cd72b9 BW |
1581 | if (xtensa_opcode_num_operands (isa, opcode) |
1582 | != insn_templ_operand_count (&initial_insn->t)) | |
e0001a05 NC |
1583 | { |
1584 | /* This is also OK because there are opcodes that | |
1585 | have different numbers of operands on different | |
1586 | architecture variations. */ | |
e0001a05 NC |
1587 | return NULL; |
1588 | } | |
1589 | ||
1590 | tr = (TransitionRule *) xmalloc (sizeof (TransitionRule)); | |
1591 | tr->opcode = opcode; | |
1592 | tr->conditions = NULL; | |
1593 | tr->to_instr = NULL; | |
1594 | ||
1595 | /* Build the conditions. First, equivalent operand condition.... */ | |
1596 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) | |
1597 | { | |
1598 | for (op2 = op1->next; op2 != NULL; op2 = op2->next) | |
1599 | { | |
1600 | if (same_operand_name (op1, op2)) | |
1601 | { | |
1602 | append_value_condition (tr, OP_EQUAL, | |
1603 | op1->operand_num, op2->operand_num); | |
1604 | } | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | /* Now the condition that an operand value must be a constant.... */ | |
1609 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) | |
1610 | { | |
1611 | if (op_is_constant (op1)) | |
1612 | { | |
1613 | append_constant_value_condition (tr, | |
1614 | OP_EQUAL, | |
1615 | op1->operand_num, | |
1616 | op_get_constant (op1)); | |
1617 | } | |
1618 | } | |
1619 | ||
1620 | ||
1621 | /* Now add the explicit preconditions listed after the "|" in the spec. | |
1622 | These are currently very limited, so we do a special case | |
1623 | parse for them. We expect spaces, opname != opname. */ | |
1624 | for (precond = initial_insn->preconds.head; | |
1625 | precond != NULL; | |
1626 | precond = precond->next) | |
1627 | { | |
1628 | op1 = NULL; | |
1629 | op2 = NULL; | |
1630 | ||
1631 | if (precond->opname1) | |
1632 | { | |
1633 | op1 = get_opmatch (&initial_insn->t.operand_map, precond->opname1); | |
1634 | if (op1 == NULL) | |
1635 | { | |
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); | |
1640 | return NULL; | |
1641 | } | |
1642 | } | |
1643 | ||
1644 | if (precond->opname2) | |
1645 | { | |
1646 | op2 = get_opmatch (&initial_insn->t.operand_map, precond->opname2); | |
1647 | if (op2 == NULL) | |
1648 | { | |
1649 | as_fatal (_("opcode '%s': no bound opname '%s' " | |
1650 | "for precondition in %s"), | |
1651 | xtensa_opcode_name (isa, opcode), | |
1652 | precond->opname2, from_string); | |
1653 | return NULL; | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | if (op1 == NULL && op2 == NULL) | |
1658 | { | |
1659 | as_fatal (_("opcode '%s': precondition only contains " | |
1660 | "constants in '%s'"), | |
1661 | xtensa_opcode_name (isa, opcode), from_string); | |
1662 | return NULL; | |
1663 | } | |
1664 | else if (op1 != NULL && op2 != NULL) | |
1665 | append_value_condition (tr, precond->cmpop, | |
1666 | op1->operand_num, op2->operand_num); | |
1667 | else if (op2 == NULL) | |
1668 | append_constant_value_condition (tr, precond->cmpop, | |
43cd72b9 | 1669 | op1->operand_num, precond->opval2); |
e0001a05 NC |
1670 | else |
1671 | append_constant_value_condition (tr, precond->cmpop, | |
43cd72b9 | 1672 | op2->operand_num, precond->opval1); |
e0001a05 NC |
1673 | } |
1674 | ||
43cd72b9 BW |
1675 | tr->options = clone_req_option_list (initial_insn->options); |
1676 | ||
e0001a05 NC |
1677 | /* Generate the replacement instructions. Some of these |
1678 | "instructions" are actually labels and literals. The literals | |
1679 | must be defined in order 0..n and a literal must be defined | |
1680 | (e.g., "LITERAL0 %imm") before use (e.g., "%LITERAL0"). The | |
1681 | labels must be defined in order, but they can be used before they | |
1682 | are defined. Also there are a number of special operands (e.g., | |
1683 | HI24S). */ | |
1684 | ||
1685 | for (r = replace_insns->head; r != NULL; r = r->next) | |
1686 | { | |
1687 | BuildInstr *bi; | |
1688 | const char *opcode_name; | |
43cd72b9 | 1689 | int operand_count; |
e0001a05 NC |
1690 | opname_map_e *op; |
1691 | unsigned idnum = 0; | |
1692 | const char *fn_name; | |
1693 | const char *operand_arg_name; | |
1694 | ||
1695 | bi = (BuildInstr *) xmalloc (sizeof (BuildInstr)); | |
1696 | append_build_insn (tr, bi); | |
1697 | ||
1698 | bi->id = 0; | |
1699 | bi->opcode = XTENSA_UNDEFINED; | |
1700 | bi->ops = NULL; | |
1701 | bi->next = NULL; | |
1702 | ||
1703 | opcode_name = r->t.opcode_name; | |
1704 | operand_count = insn_templ_operand_count (&r->t); | |
1705 | ||
1706 | if (parse_id_constant (opcode_name, "LITERAL", &idnum)) | |
1707 | { | |
1708 | bi->typ = INSTR_LITERAL_DEF; | |
1709 | bi->id = idnum; | |
1710 | if (idnum != literal_count) | |
1711 | as_fatal (_("generated literals must be numbered consecutively")); | |
1712 | ++literal_count; | |
1713 | if (operand_count != 1) | |
1714 | as_fatal (_("expected one operand for generated literal")); | |
1715 | ||
1716 | } | |
1717 | else if (parse_id_constant (opcode_name, "LABEL", &idnum)) | |
1718 | { | |
1719 | bi->typ = INSTR_LABEL_DEF; | |
1720 | bi->id = idnum; | |
1721 | if (idnum != label_count) | |
1722 | as_fatal (_("generated labels must be numbered consecutively")); | |
1723 | ++label_count; | |
1724 | if (operand_count != 0) | |
1725 | as_fatal (_("expected 0 operands for generated label")); | |
1726 | } | |
1727 | else | |
1728 | { | |
1729 | bi->typ = INSTR_INSTR; | |
1730 | bi->opcode = xtensa_opcode_lookup (isa, r->t.opcode_name); | |
1731 | if (bi->opcode == XTENSA_UNDEFINED) | |
43cd72b9 BW |
1732 | { |
1733 | as_warn (_("invalid opcode '%s' in transition rule '%s'"), | |
1734 | r->t.opcode_name, to_string); | |
1735 | return NULL; | |
1736 | } | |
e0001a05 | 1737 | /* Check for the right number of ops. */ |
c138bc38 | 1738 | if (xtensa_opcode_num_operands (isa, bi->opcode) |
e0001a05 NC |
1739 | != (int) operand_count) |
1740 | as_fatal (_("opcode '%s': replacement does not have %d ops"), | |
43cd72b9 BW |
1741 | opcode_name, |
1742 | xtensa_opcode_num_operands (isa, bi->opcode)); | |
e0001a05 NC |
1743 | } |
1744 | ||
1745 | for (op = r->t.operand_map.head; op != NULL; op = op->next) | |
1746 | { | |
1747 | unsigned idnum; | |
1748 | ||
1749 | if (op_is_constant (op)) | |
1750 | append_constant_op (bi, op->operand_num, op_get_constant (op)); | |
1751 | else if (parse_id_constant (op->operand_name, "%LITERAL", &idnum)) | |
1752 | { | |
1753 | if (idnum >= literal_count) | |
1754 | as_fatal (_("opcode %s: replacement " | |
1755 | "literal %d >= literal_count(%d)"), | |
1756 | opcode_name, idnum, literal_count); | |
1757 | append_literal_op (bi, op->operand_num, idnum); | |
1758 | } | |
1759 | else if (parse_id_constant (op->operand_name, "%LABEL", &idnum)) | |
1760 | { | |
1761 | has_label = TRUE; | |
1762 | if (idnum > max_label_count) | |
1763 | max_label_count = idnum; | |
1764 | append_label_op (bi, op->operand_num, idnum); | |
1765 | } | |
1766 | else if (parse_id_constant (op->operand_name, "a", &idnum)) | |
1767 | append_constant_op (bi, op->operand_num, idnum); | |
1768 | else if (op->operand_name[0] == '%') | |
1769 | { | |
1770 | opname_map_e *orig_op; | |
1771 | orig_op = get_opmatch (&initial_insn->t.operand_map, | |
1772 | op->operand_name); | |
1773 | if (orig_op == NULL) | |
1774 | { | |
1775 | as_fatal (_("opcode %s: unidentified operand '%s' in '%s'"), | |
1776 | opcode_name, op->operand_name, to_string); | |
1777 | ||
1778 | append_constant_op (bi, op->operand_num, 0); | |
1779 | } | |
1780 | else | |
1781 | append_field_op (bi, op->operand_num, orig_op->operand_num); | |
1782 | } | |
1783 | else if (parse_special_fn (op->operand_name, | |
1784 | &fn_name, &operand_arg_name)) | |
1785 | { | |
1786 | opname_map_e *orig_op; | |
1787 | OpType typ = OP_CONSTANT; | |
1788 | ||
1789 | if (strcmp (fn_name, "LOW8") == 0) | |
1790 | typ = OP_OPERAND_LOW8; | |
1791 | else if (strcmp (fn_name, "HI24S") == 0) | |
1792 | typ = OP_OPERAND_HI24S; | |
1793 | else if (strcmp (fn_name, "F32MINUS") == 0) | |
1794 | typ = OP_OPERAND_F32MINUS; | |
43cd72b9 BW |
1795 | else if (strcmp (fn_name, "LOW16U") == 0) |
1796 | typ = OP_OPERAND_LOW16U; | |
1797 | else if (strcmp (fn_name, "HI16U") == 0) | |
1798 | typ = OP_OPERAND_HI16U; | |
e0001a05 | 1799 | else |
43cd72b9 | 1800 | as_fatal (_("unknown user-defined function %s"), fn_name); |
e0001a05 NC |
1801 | |
1802 | orig_op = get_opmatch (&initial_insn->t.operand_map, | |
1803 | operand_arg_name); | |
1804 | if (orig_op == NULL) | |
1805 | { | |
1806 | as_fatal (_("opcode %s: unidentified operand '%s' in '%s'"), | |
1807 | opcode_name, op->operand_name, to_string); | |
1808 | append_constant_op (bi, op->operand_num, 0); | |
1809 | } | |
1810 | else | |
1811 | append_user_fn_field_op (bi, op->operand_num, | |
1812 | typ, orig_op->operand_num); | |
1813 | } | |
1814 | else | |
1815 | { | |
1816 | as_fatal (_("opcode %s: could not parse operand '%s' in '%s'"), | |
1817 | opcode_name, op->operand_name, to_string); | |
1818 | append_constant_op (bi, op->operand_num, 0); | |
1819 | } | |
1820 | } | |
1821 | } | |
1822 | if (has_label && max_label_count >= label_count) | |
1823 | { | |
1824 | as_fatal (_("opcode %s: replacement label %d >= label_count(%d)"), | |
1825 | xtensa_opcode_name (isa, opcode), | |
1826 | max_label_count, label_count); | |
1827 | return NULL; | |
1828 | } | |
1829 | ||
1830 | return tr; | |
1831 | } | |
1832 | ||
1833 | ||
7fa3d080 BW |
1834 | static TransitionTable * |
1835 | build_transition_table (const string_pattern_pair *transitions, | |
1836 | int transition_count, | |
1837 | transition_cmp_fn cmp) | |
e0001a05 NC |
1838 | { |
1839 | TransitionTable *table = NULL; | |
43cd72b9 BW |
1840 | int num_opcodes = xtensa_isa_num_opcodes (xtensa_default_isa); |
1841 | int i, tnum; | |
e0001a05 NC |
1842 | |
1843 | if (table != NULL) | |
1844 | return table; | |
1845 | ||
1846 | /* Otherwise, build it now. */ | |
1847 | table = (TransitionTable *) xmalloc (sizeof (TransitionTable)); | |
1848 | table->num_opcodes = num_opcodes; | |
1849 | table->table = | |
1850 | (TransitionList **) xmalloc (sizeof (TransitionTable *) * num_opcodes); | |
1851 | ||
1852 | for (i = 0; i < num_opcodes; i++) | |
1853 | table->table[i] = NULL; | |
1854 | ||
1855 | for (tnum = 0; tnum < transition_count; tnum++) | |
1856 | { | |
1857 | const char *from_string = transitions[tnum].pattern; | |
1858 | const char *to_string = transitions[tnum].replacement; | |
1859 | ||
1860 | insn_pattern initial_insn; | |
1861 | insn_repl replace_insns; | |
1862 | TransitionRule *tr; | |
1863 | ||
1864 | init_insn_pattern (&initial_insn); | |
1865 | if (!parse_insn_pattern (from_string, &initial_insn)) | |
1866 | { | |
1867 | as_fatal (_("could not parse INSN_PATTERN '%s'"), from_string); | |
1868 | clear_insn_pattern (&initial_insn); | |
1869 | continue; | |
1870 | } | |
1871 | ||
1872 | init_insn_repl (&replace_insns); | |
1873 | if (!parse_insn_repl (to_string, &replace_insns)) | |
1874 | { | |
1875 | as_fatal (_("could not parse INSN_REPL '%s'"), to_string); | |
1876 | clear_insn_pattern (&initial_insn); | |
1877 | clear_insn_repl (&replace_insns); | |
1878 | continue; | |
1879 | } | |
1880 | ||
43cd72b9 BW |
1881 | if (transition_applies (&initial_insn, from_string, to_string)) |
1882 | { | |
1883 | tr = build_transition (&initial_insn, &replace_insns, | |
1884 | from_string, to_string); | |
1885 | if (tr) | |
1886 | append_transition (table, tr->opcode, tr, cmp); | |
1887 | else | |
1888 | { | |
1889 | #if TENSILICA_DEBUG | |
1890 | as_warn (_("could not build transition for %s => %s"), | |
1891 | from_string, to_string); | |
1892 | #endif | |
1893 | } | |
1894 | } | |
e0001a05 NC |
1895 | |
1896 | clear_insn_repl (&replace_insns); | |
1897 | clear_insn_pattern (&initial_insn); | |
1898 | } | |
1899 | return table; | |
1900 | } | |
1901 | ||
1902 | \f | |
1903 | extern TransitionTable * | |
7fa3d080 | 1904 | xg_build_widen_table (transition_cmp_fn cmp) |
e0001a05 NC |
1905 | { |
1906 | static TransitionTable *table = NULL; | |
1907 | if (table == NULL) | |
43cd72b9 | 1908 | table = build_transition_table (widen_spec_list, WIDEN_COUNT, cmp); |
e0001a05 NC |
1909 | return table; |
1910 | } | |
1911 | ||
1912 | ||
1913 | extern TransitionTable * | |
7fa3d080 | 1914 | xg_build_simplify_table (transition_cmp_fn cmp) |
e0001a05 NC |
1915 | { |
1916 | static TransitionTable *table = NULL; | |
1917 | if (table == NULL) | |
43cd72b9 | 1918 | table = build_transition_table (simplify_spec_list, SIMPLIFY_COUNT, cmp); |
e0001a05 NC |
1919 | return table; |
1920 | } |