| 1 | /* Table of relaxations for Xtensa assembly. |
| 2 | Copyright 2003, 2004, 2005 Free Software Foundation, Inc. |
| 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 |
| 18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 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 |
| 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 |
| 28 | operands from the pattern should be used in the result. |
| 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. |
| 34 | |
| 35 | The patterns match a language like: |
| 36 | |
| 37 | INSN_PATTERN ::= INSN_TEMPL ( '|' PRECOND )* ( '?' OPTIONPRED )* |
| 38 | INSN_TEMPL ::= OPCODE ' ' [ OPERAND (',' OPERAND)* ] |
| 39 | OPCODE ::= id |
| 40 | OPERAND ::= CONSTANT | VARIABLE | SPECIALFN '(' VARIABLE ')' |
| 41 | SPECIALFN ::= 'HI24S' | 'F32MINUS' | 'LOW8' |
| 42 | | 'HI16' | 'LOW16' |
| 43 | VARIABLE ::= '%' id |
| 44 | PRECOND ::= OPERAND CMPOP OPERAND |
| 45 | CMPOP ::= '==' | '!=' |
| 46 | OPTIONPRED ::= OPTIONNAME ('+' OPTIONNAME) |
| 47 | OPTIONNAME ::= '"' id '"' |
| 48 | |
| 49 | The replacement language |
| 50 | INSN_REPL ::= INSN_LABEL_LIT ( ';' INSN_LABEL_LIT )* |
| 51 | INSN_LABEL_LIT ::= INSN_TEMPL |
| 52 | | 'LABEL' num |
| 53 | | 'LITERAL' num ' ' VARIABLE |
| 54 | |
| 55 | The operands in a PRECOND must be constants or variables bound by |
| 56 | the INSN_PATTERN. |
| 57 | |
| 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 | |
| 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. |
| 78 | |
| 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> |
| 102 | #include "xtensa-config.h" |
| 103 | |
| 104 | /* Imported from bfd. */ |
| 105 | extern xtensa_isa xtensa_default_isa; |
| 106 | |
| 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. */ |
| 133 | int operand_num; |
| 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; |
| 191 | ReqOptionList *options; |
| 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; |
| 221 | int count; |
| 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 |
| 238 | encodings. A valid transition may require multiple steps of |
| 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 | { |
| 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"}, |
| 262 | {"srli %at,%as,%imm", "extui %at,%as,%imm,F32MINUS(%imm)"}, |
| 263 | {"slli %ar,%as,0", "or %ar,%as,%as"}, |
| 264 | |
| 265 | /* Widening with literals or const16. */ |
| 266 | {"movi %at,%imm ? IsaUseL32R ", |
| 267 | "LITERAL0 %imm; l32r %at,%LITERAL0"}, |
| 268 | {"movi %at,%imm ? IsaUseConst16", |
| 269 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm)"}, |
| 270 | |
| 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)"}, |
| 275 | |
| 276 | /* In the end convert to either an l32r or const16. */ |
| 277 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseL32R", |
| 278 | "LITERAL0 %imm; l32r %ar,%LITERAL0; add %ar,%as,%ar"}, |
| 279 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseConst16", |
| 280 | "const16 %ar,HI16U(%imm); const16 %ar,LOW16U(%imm); add %ar,%as,%ar"}, |
| 281 | |
| 282 | /* Widening the load instructions with too-large immediates */ |
| 283 | {"l8ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
| 284 | "LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l8ui %at,%at,0"}, |
| 285 | {"l16si %at,%as,%imm | %at!=%as ? IsaUseL32R", |
| 286 | "LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l16si %at,%at,0"}, |
| 287 | {"l16ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
| 288 | "LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l16ui %at,%at,0"}, |
| 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 | |
| 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", |
| 306 | "loop %as,%LABEL0;" |
| 307 | "rsr.lend %as;" /* LEND */ |
| 308 | "wsr.lbeg %as;" /* LBEG */ |
| 309 | "addi %as, %as, 0;" /* lo8(%label-%LABEL1) */ |
| 310 | "addmi %as, %as, 0;" /* mid8(%label-%LABEL1) */ |
| 311 | "wsr.lend %as;" |
| 312 | "isync;" |
| 313 | "rsr.lcount %as;" /* LCOUNT */ |
| 314 | "addi %as, %as, 1;" /* density -> addi.n %as, %as, 1 */ |
| 315 | "LABEL0"}, |
| 316 | {"loopgtz %as,%label | %as!=1 ? IsaUseLoops", |
| 317 | "beqz %as,%label;" |
| 318 | "bltz %as,%label;" |
| 319 | "loopgtz %as,%LABEL0;" |
| 320 | "rsr.lend %as;" /* LEND */ |
| 321 | "wsr.lbeg %as;" /* LBEG */ |
| 322 | "addi %as, %as, 0;" /* lo8(%label-%LABEL1) */ |
| 323 | "addmi %as, %as, 0;" /* mid8(%label-%LABEL1) */ |
| 324 | "wsr.lend %as;" |
| 325 | "isync;" |
| 326 | "rsr.lcount %as;" /* LCOUNT */ |
| 327 | "addi %as, %as, 1;" /* density -> addi.n %as, %as, 1 */ |
| 328 | "LABEL0"}, |
| 329 | {"loopnez %as,%label | %as!=1 ? IsaUseLoops", |
| 330 | "beqz %as,%label;" |
| 331 | "loopnez %as,%LABEL0;" |
| 332 | "rsr.lend %as;" /* LEND */ |
| 333 | "wsr.lbeg %as;" /* LBEG */ |
| 334 | "addi %as, %as, 0;" /* lo8(%label-%LABEL1) */ |
| 335 | "addmi %as, %as, 0;" /* mid8(%label-%LABEL1) */ |
| 336 | "wsr.lend %as;" |
| 337 | "isync;" |
| 338 | "rsr.lcount %as;" /* LCOUNT */ |
| 339 | "addi %as, %as, 1;" /* density -> addi.n %as, %as, 1 */ |
| 340 | "LABEL0"}, |
| 341 | |
| 342 | {"beqz %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%LABEL0;j %label;LABEL0"}, |
| 343 | {"bnez %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%LABEL0;j %label;LABEL0"}, |
| 344 | {"beqz %as,%label", "bnez %as,%LABEL0;j %label;LABEL0"}, |
| 345 | {"bnez %as,%label", "beqz %as,%LABEL0;j %label;LABEL0"}, |
| 346 | {"beqzt %as,%label ? IsaUsePredictedBranches", "bnez %as,%LABEL0;j %label;LABEL0"}, |
| 347 | {"bnezt %as,%label ? IsaUsePredictedBranches", "beqz %as,%LABEL0;j %label;LABEL0"}, |
| 348 | |
| 349 | {"bgez %as,%label", "bltz %as,%LABEL0;j %label;LABEL0"}, |
| 350 | {"bltz %as,%label", "bgez %as,%LABEL0;j %label;LABEL0"}, |
| 351 | {"beqi %as,%imm,%label", "bnei %as,%imm,%LABEL0;j %label;LABEL0"}, |
| 352 | {"bnei %as,%imm,%label", "beqi %as,%imm,%LABEL0;j %label;LABEL0"}, |
| 353 | {"bgei %as,%imm,%label", "blti %as,%imm,%LABEL0;j %label;LABEL0"}, |
| 354 | {"blti %as,%imm,%label", "bgei %as,%imm,%LABEL0;j %label;LABEL0"}, |
| 355 | {"bgeui %as,%imm,%label", "bltui %as,%imm,%LABEL0;j %label;LABEL0"}, |
| 356 | {"bltui %as,%imm,%label", "bgeui %as,%imm,%LABEL0;j %label;LABEL0"}, |
| 357 | {"bbci %as,%imm,%label", "bbsi %as,%imm,%LABEL0;j %label;LABEL0"}, |
| 358 | {"bbsi %as,%imm,%label", "bbci %as,%imm,%LABEL0;j %label;LABEL0"}, |
| 359 | {"beq %as,%at,%label", "bne %as,%at,%LABEL0;j %label;LABEL0"}, |
| 360 | {"bne %as,%at,%label", "beq %as,%at,%LABEL0;j %label;LABEL0"}, |
| 361 | {"beqt %as,%at,%label ? IsaUsePredictedBranches", "bne %as,%at,%LABEL0;j %label;LABEL0"}, |
| 362 | {"bnet %as,%at,%label ? IsaUsePredictedBranches", "beq %as,%at,%LABEL0;j %label;LABEL0"}, |
| 363 | {"bge %as,%at,%label", "blt %as,%at,%LABEL0;j %label;LABEL0"}, |
| 364 | {"blt %as,%at,%label", "bge %as,%at,%LABEL0;j %label;LABEL0"}, |
| 365 | {"bgeu %as,%at,%label", "bltu %as,%at,%LABEL0;j %label;LABEL0"}, |
| 366 | {"bltu %as,%at,%label", "bgeu %as,%at,%LABEL0;j %label;LABEL0"}, |
| 367 | {"bany %as,%at,%label", "bnone %as,%at,%LABEL0;j %label;LABEL0"}, |
| 368 | |
| 369 | {"bt %bs,%label ? IsaUseBooleans", "bf %bs,%LABEL0;j %label;LABEL0"}, |
| 370 | {"bf %bs,%label ? IsaUseBooleans", "bt %bs,%LABEL0;j %label;LABEL0"}, |
| 371 | |
| 372 | {"bnone %as,%at,%label", "bany %as,%at,%LABEL0;j %label;LABEL0"}, |
| 373 | {"ball %as,%at,%label", "bnall %as,%at,%LABEL0;j %label;LABEL0"}, |
| 374 | {"bnall %as,%at,%label", "ball %as,%at,%LABEL0;j %label;LABEL0"}, |
| 375 | {"bbc %as,%at,%label", "bbs %as,%at,%LABEL0;j %label;LABEL0"}, |
| 376 | {"bbs %as,%at,%label", "bbc %as,%at,%LABEL0;j %label;LABEL0"}, |
| 377 | |
| 378 | /* Expanding calls with literals. */ |
| 379 | {"call0 %label,%ar0 ? IsaUseL32R", |
| 380 | "LITERAL0 %label; l32r a0,%LITERAL0; callx0 a0,%ar0"}, |
| 381 | {"call4 %label,%ar4 ? IsaUseL32R", |
| 382 | "LITERAL0 %label; l32r a4,%LITERAL0; callx4 a4,%ar4"}, |
| 383 | {"call8 %label,%ar8 ? IsaUseL32R", |
| 384 | "LITERAL0 %label; l32r a8,%LITERAL0; callx8 a8,%ar8"}, |
| 385 | {"call12 %label,%ar12 ? IsaUseL32R", |
| 386 | "LITERAL0 %label; l32r a12,%LITERAL0; callx12 a12,%ar12"}, |
| 387 | |
| 388 | /* Expanding calls with const16. */ |
| 389 | {"call0 %label,%ar0 ? IsaUseConst16", |
| 390 | "const16 a0,HI16U(%label); const16 a0,LOW16U(%label); callx0 a0,%ar0"}, |
| 391 | {"call4 %label,%ar4 ? IsaUseConst16", |
| 392 | "const16 a4,HI16U(%label); const16 a4,LOW16U(%label); callx4 a4,%ar4"}, |
| 393 | {"call8 %label,%ar8 ? IsaUseConst16", |
| 394 | "const16 a8,HI16U(%label); const16 a8,LOW16U(%label); callx8 a8,%ar8"}, |
| 395 | {"call12 %label,%ar12 ? IsaUseConst16", |
| 396 | "const16 a12,HI16U(%label); const16 a12,LOW16U(%label); callx12 a12,%ar12"} |
| 397 | }; |
| 398 | |
| 399 | #define WIDEN_COUNT (sizeof (widen_spec_list) / sizeof (string_pattern_pair)) |
| 400 | |
| 401 | |
| 402 | /* The simplify_spec_list specifies simplifying transformations that |
| 403 | will reduce the instruction width or otherwise simplify an |
| 404 | instruction. These are usually applied before relaxation in the |
| 405 | assembler. It is always legal to simplify. Even for "addi as, 0", |
| 406 | the "addi.n as, 0" will eventually be widened back to an "addi 0" |
| 407 | after the widening table is applied. Note: The usage of this table |
| 408 | has changed somewhat so that it is entirely specific to "narrowing" |
| 409 | instructions to use the density option. This table is not used at |
| 410 | all when the density option is not available. */ |
| 411 | |
| 412 | string_pattern_pair simplify_spec_list[] = |
| 413 | { |
| 414 | {"add %ar,%as,%at ? IsaUseDensityInstruction", "add.n %ar,%as,%at"}, |
| 415 | {"addi.n %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, |
| 416 | {"addi %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, |
| 417 | {"addi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, |
| 418 | {"addmi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, |
| 419 | {"beqz %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%label"}, |
| 420 | {"bnez %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%label"}, |
| 421 | {"l32i %at,%as,%imm ? IsaUseDensityInstruction", "l32i.n %at,%as,%imm"}, |
| 422 | {"movi %as,%imm ? IsaUseDensityInstruction", "movi.n %as,%imm"}, |
| 423 | {"nop ? realnop ? IsaUseDensityInstruction", "nop.n"}, |
| 424 | {"or %ar,%as,%at | %ar==%as | %as==%at ? IsaUseDensityInstruction", "nop.n"}, |
| 425 | {"or %ar,%as,%at | %ar!=%as | %as==%at ? IsaUseDensityInstruction", "mov.n %ar,%as"}, |
| 426 | {"ret %as ? IsaUseDensityInstruction", "ret.n %as"}, |
| 427 | {"retw %as ? IsaUseDensityInstruction", "retw.n %as"}, |
| 428 | {"s32i %at,%as,%imm ? IsaUseDensityInstruction", "s32i.n %at,%as,%imm"}, |
| 429 | {"slli %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"} |
| 430 | }; |
| 431 | |
| 432 | #define SIMPLIFY_COUNT \ |
| 433 | (sizeof (simplify_spec_list) / sizeof (string_pattern_pair)) |
| 434 | |
| 435 | \f |
| 436 | /* Externally visible functions. */ |
| 437 | |
| 438 | extern bfd_boolean xg_has_userdef_op_fn (OpType); |
| 439 | extern long xg_apply_userdef_op_fn (OpType, long); |
| 440 | |
| 441 | |
| 442 | static void |
| 443 | append_transition (TransitionTable *tt, |
| 444 | xtensa_opcode opcode, |
| 445 | TransitionRule *t, |
| 446 | transition_cmp_fn cmp) |
| 447 | { |
| 448 | TransitionList *tl = (TransitionList *) xmalloc (sizeof (TransitionList)); |
| 449 | TransitionList *prev; |
| 450 | TransitionList **t_p; |
| 451 | assert (tt != NULL); |
| 452 | assert (opcode < tt->num_opcodes); |
| 453 | |
| 454 | prev = tt->table[opcode]; |
| 455 | tl->rule = t; |
| 456 | tl->next = NULL; |
| 457 | if (prev == NULL) |
| 458 | { |
| 459 | tt->table[opcode] = tl; |
| 460 | return; |
| 461 | } |
| 462 | |
| 463 | for (t_p = &tt->table[opcode]; (*t_p) != NULL; t_p = &(*t_p)->next) |
| 464 | { |
| 465 | if (cmp && cmp (t, (*t_p)->rule) < 0) |
| 466 | { |
| 467 | /* Insert it here. */ |
| 468 | tl->next = *t_p; |
| 469 | *t_p = tl; |
| 470 | return; |
| 471 | } |
| 472 | } |
| 473 | (*t_p) = tl; |
| 474 | } |
| 475 | |
| 476 | |
| 477 | static void |
| 478 | append_condition (TransitionRule *tr, Precondition *cond) |
| 479 | { |
| 480 | PreconditionList *pl = |
| 481 | (PreconditionList *) xmalloc (sizeof (PreconditionList)); |
| 482 | PreconditionList *prev = tr->conditions; |
| 483 | PreconditionList *nxt; |
| 484 | |
| 485 | pl->precond = cond; |
| 486 | pl->next = NULL; |
| 487 | if (prev == NULL) |
| 488 | { |
| 489 | tr->conditions = pl; |
| 490 | return; |
| 491 | } |
| 492 | nxt = prev->next; |
| 493 | while (nxt != NULL) |
| 494 | { |
| 495 | prev = nxt; |
| 496 | nxt = nxt->next; |
| 497 | } |
| 498 | prev->next = pl; |
| 499 | } |
| 500 | |
| 501 | |
| 502 | static void |
| 503 | append_value_condition (TransitionRule *tr, |
| 504 | CmpOp cmp, |
| 505 | unsigned op1, |
| 506 | unsigned op2) |
| 507 | { |
| 508 | Precondition *cond = (Precondition *) xmalloc (sizeof (Precondition)); |
| 509 | |
| 510 | cond->cmp = cmp; |
| 511 | cond->op_num = op1; |
| 512 | cond->typ = OP_OPERAND; |
| 513 | cond->op_data = op2; |
| 514 | append_condition (tr, cond); |
| 515 | } |
| 516 | |
| 517 | |
| 518 | static void |
| 519 | append_constant_value_condition (TransitionRule *tr, |
| 520 | CmpOp cmp, |
| 521 | unsigned op1, |
| 522 | unsigned cnst) |
| 523 | { |
| 524 | Precondition *cond = (Precondition *) xmalloc (sizeof (Precondition)); |
| 525 | |
| 526 | cond->cmp = cmp; |
| 527 | cond->op_num = op1; |
| 528 | cond->typ = OP_CONSTANT; |
| 529 | cond->op_data = cnst; |
| 530 | append_condition (tr, cond); |
| 531 | } |
| 532 | |
| 533 | |
| 534 | static void |
| 535 | append_build_insn (TransitionRule *tr, BuildInstr *bi) |
| 536 | { |
| 537 | BuildInstr *prev = tr->to_instr; |
| 538 | BuildInstr *nxt; |
| 539 | |
| 540 | bi->next = NULL; |
| 541 | if (prev == NULL) |
| 542 | { |
| 543 | tr->to_instr = bi; |
| 544 | return; |
| 545 | } |
| 546 | nxt = prev->next; |
| 547 | while (nxt != 0) |
| 548 | { |
| 549 | prev = nxt; |
| 550 | nxt = prev->next; |
| 551 | } |
| 552 | prev->next = bi; |
| 553 | } |
| 554 | |
| 555 | |
| 556 | static void |
| 557 | append_op (BuildInstr *bi, BuildOp *b_op) |
| 558 | { |
| 559 | BuildOp *prev = bi->ops; |
| 560 | BuildOp *nxt; |
| 561 | |
| 562 | if (prev == NULL) |
| 563 | { |
| 564 | bi->ops = b_op; |
| 565 | return; |
| 566 | } |
| 567 | nxt = prev->next; |
| 568 | while (nxt != NULL) |
| 569 | { |
| 570 | prev = nxt; |
| 571 | nxt = nxt->next; |
| 572 | } |
| 573 | prev->next = b_op; |
| 574 | } |
| 575 | |
| 576 | |
| 577 | static void |
| 578 | append_literal_op (BuildInstr *bi, unsigned op1, unsigned litnum) |
| 579 | { |
| 580 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); |
| 581 | |
| 582 | b_op->op_num = op1; |
| 583 | b_op->typ = OP_LITERAL; |
| 584 | b_op->op_data = litnum; |
| 585 | b_op->next = NULL; |
| 586 | append_op (bi, b_op); |
| 587 | } |
| 588 | |
| 589 | |
| 590 | static void |
| 591 | append_label_op (BuildInstr *bi, unsigned op1, unsigned labnum) |
| 592 | { |
| 593 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); |
| 594 | |
| 595 | b_op->op_num = op1; |
| 596 | b_op->typ = OP_LABEL; |
| 597 | b_op->op_data = labnum; |
| 598 | b_op->next = NULL; |
| 599 | append_op (bi, b_op); |
| 600 | } |
| 601 | |
| 602 | |
| 603 | static void |
| 604 | append_constant_op (BuildInstr *bi, unsigned op1, unsigned cnst) |
| 605 | { |
| 606 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); |
| 607 | |
| 608 | b_op->op_num = op1; |
| 609 | b_op->typ = OP_CONSTANT; |
| 610 | b_op->op_data = cnst; |
| 611 | b_op->next = NULL; |
| 612 | append_op (bi, b_op); |
| 613 | } |
| 614 | |
| 615 | |
| 616 | static void |
| 617 | append_field_op (BuildInstr *bi, unsigned op1, unsigned src_op) |
| 618 | { |
| 619 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); |
| 620 | |
| 621 | b_op->op_num = op1; |
| 622 | b_op->typ = OP_OPERAND; |
| 623 | b_op->op_data = src_op; |
| 624 | b_op->next = NULL; |
| 625 | append_op (bi, b_op); |
| 626 | } |
| 627 | |
| 628 | |
| 629 | /* These could be generated but are not currently. */ |
| 630 | |
| 631 | static void |
| 632 | append_user_fn_field_op (BuildInstr *bi, |
| 633 | unsigned op1, |
| 634 | OpType typ, |
| 635 | unsigned src_op) |
| 636 | { |
| 637 | BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp)); |
| 638 | |
| 639 | b_op->op_num = op1; |
| 640 | b_op->typ = typ; |
| 641 | b_op->op_data = src_op; |
| 642 | b_op->next = NULL; |
| 643 | append_op (bi, b_op); |
| 644 | } |
| 645 | |
| 646 | |
| 647 | /* These operand functions are the semantics of user-defined |
| 648 | operand functions. */ |
| 649 | |
| 650 | static long |
| 651 | operand_function_HI24S (long a) |
| 652 | { |
| 653 | if (a & 0x80) |
| 654 | return (a & (~0xff)) + 0x100; |
| 655 | else |
| 656 | return (a & (~0xff)); |
| 657 | } |
| 658 | |
| 659 | |
| 660 | static long |
| 661 | operand_function_F32MINUS (long a) |
| 662 | { |
| 663 | return (32 - a); |
| 664 | } |
| 665 | |
| 666 | |
| 667 | static long |
| 668 | operand_function_LOW8 (long a) |
| 669 | { |
| 670 | if (a & 0x80) |
| 671 | return (a & 0xff) | ~0xff; |
| 672 | else |
| 673 | return (a & 0xff); |
| 674 | } |
| 675 | |
| 676 | |
| 677 | static long |
| 678 | operand_function_LOW16U (long a) |
| 679 | { |
| 680 | return (a & 0xffff); |
| 681 | } |
| 682 | |
| 683 | |
| 684 | static long |
| 685 | operand_function_HI16U (long a) |
| 686 | { |
| 687 | unsigned long b = a & 0xffff0000; |
| 688 | return (long) (b >> 16); |
| 689 | } |
| 690 | |
| 691 | |
| 692 | bfd_boolean |
| 693 | xg_has_userdef_op_fn (OpType op) |
| 694 | { |
| 695 | switch (op) |
| 696 | { |
| 697 | case OP_OPERAND_F32MINUS: |
| 698 | case OP_OPERAND_LOW8: |
| 699 | case OP_OPERAND_HI24S: |
| 700 | case OP_OPERAND_LOW16U: |
| 701 | case OP_OPERAND_HI16U: |
| 702 | return TRUE; |
| 703 | default: |
| 704 | break; |
| 705 | } |
| 706 | return FALSE; |
| 707 | } |
| 708 | |
| 709 | |
| 710 | long |
| 711 | xg_apply_userdef_op_fn (OpType op, long a) |
| 712 | { |
| 713 | switch (op) |
| 714 | { |
| 715 | case OP_OPERAND_F32MINUS: |
| 716 | return operand_function_F32MINUS (a); |
| 717 | case OP_OPERAND_LOW8: |
| 718 | return operand_function_LOW8 (a); |
| 719 | case OP_OPERAND_HI24S: |
| 720 | return operand_function_HI24S (a); |
| 721 | case OP_OPERAND_LOW16U: |
| 722 | return operand_function_LOW16U (a); |
| 723 | case OP_OPERAND_HI16U: |
| 724 | return operand_function_HI16U (a); |
| 725 | default: |
| 726 | break; |
| 727 | } |
| 728 | return FALSE; |
| 729 | } |
| 730 | |
| 731 | |
| 732 | /* Generate a transition table. */ |
| 733 | |
| 734 | static const char * |
| 735 | enter_opname_n (const char *name, int len) |
| 736 | { |
| 737 | opname_e *op; |
| 738 | |
| 739 | for (op = local_opnames; op != NULL; op = op->next) |
| 740 | { |
| 741 | if (strlen (op->opname) == (unsigned) len |
| 742 | && strncmp (op->opname, name, len) == 0) |
| 743 | return op->opname; |
| 744 | } |
| 745 | op = (opname_e *) xmalloc (sizeof (opname_e)); |
| 746 | op->opname = (char *) xmalloc (len + 1); |
| 747 | strncpy (op->opname, name, len); |
| 748 | op->opname[len] = '\0'; |
| 749 | return op->opname; |
| 750 | } |
| 751 | |
| 752 | |
| 753 | static const char * |
| 754 | enter_opname (const char *name) |
| 755 | { |
| 756 | opname_e *op; |
| 757 | |
| 758 | for (op = local_opnames; op != NULL; op = op->next) |
| 759 | { |
| 760 | if (strcmp (op->opname, name) == 0) |
| 761 | return op->opname; |
| 762 | } |
| 763 | op = (opname_e *) xmalloc (sizeof (opname_e)); |
| 764 | op->opname = xstrdup (name); |
| 765 | return op->opname; |
| 766 | } |
| 767 | |
| 768 | |
| 769 | static void |
| 770 | init_opname_map (opname_map *m) |
| 771 | { |
| 772 | m->head = NULL; |
| 773 | m->tail = &m->head; |
| 774 | } |
| 775 | |
| 776 | |
| 777 | static void |
| 778 | clear_opname_map (opname_map *m) |
| 779 | { |
| 780 | opname_map_e *e; |
| 781 | |
| 782 | while (m->head != NULL) |
| 783 | { |
| 784 | e = m->head; |
| 785 | m->head = e->next; |
| 786 | free (e); |
| 787 | } |
| 788 | m->tail = &m->head; |
| 789 | } |
| 790 | |
| 791 | |
| 792 | static bfd_boolean |
| 793 | same_operand_name (const opname_map_e *m1, const opname_map_e *m2) |
| 794 | { |
| 795 | if (m1->operand_name == NULL || m1->operand_name == NULL) |
| 796 | return FALSE; |
| 797 | return (m1->operand_name == m2->operand_name); |
| 798 | } |
| 799 | |
| 800 | |
| 801 | static opname_map_e * |
| 802 | get_opmatch (opname_map *map, const char *operand_name) |
| 803 | { |
| 804 | opname_map_e *m; |
| 805 | |
| 806 | for (m = map->head; m != NULL; m = m->next) |
| 807 | { |
| 808 | if (strcmp (m->operand_name, operand_name) == 0) |
| 809 | return m; |
| 810 | } |
| 811 | return NULL; |
| 812 | } |
| 813 | |
| 814 | |
| 815 | static bfd_boolean |
| 816 | op_is_constant (const opname_map_e *m1) |
| 817 | { |
| 818 | return (m1->operand_name == NULL); |
| 819 | } |
| 820 | |
| 821 | |
| 822 | static unsigned |
| 823 | op_get_constant (const opname_map_e *m1) |
| 824 | { |
| 825 | assert (m1->operand_name == NULL); |
| 826 | return m1->constant_value; |
| 827 | } |
| 828 | |
| 829 | |
| 830 | static void |
| 831 | init_precond_list (precond_list *l) |
| 832 | { |
| 833 | l->head = NULL; |
| 834 | l->tail = &l->head; |
| 835 | } |
| 836 | |
| 837 | |
| 838 | static void |
| 839 | clear_precond_list (precond_list *l) |
| 840 | { |
| 841 | precond_e *e; |
| 842 | |
| 843 | while (l->head != NULL) |
| 844 | { |
| 845 | e = l->head; |
| 846 | l->head = e->next; |
| 847 | free (e); |
| 848 | } |
| 849 | l->tail = &l->head; |
| 850 | } |
| 851 | |
| 852 | |
| 853 | static void |
| 854 | init_insn_templ (insn_templ *t) |
| 855 | { |
| 856 | t->opcode_name = NULL; |
| 857 | init_opname_map (&t->operand_map); |
| 858 | } |
| 859 | |
| 860 | |
| 861 | static void |
| 862 | clear_insn_templ (insn_templ *t) |
| 863 | { |
| 864 | clear_opname_map (&t->operand_map); |
| 865 | } |
| 866 | |
| 867 | |
| 868 | static void |
| 869 | init_insn_pattern (insn_pattern *p) |
| 870 | { |
| 871 | init_insn_templ (&p->t); |
| 872 | init_precond_list (&p->preconds); |
| 873 | p->options = NULL; |
| 874 | } |
| 875 | |
| 876 | |
| 877 | static void |
| 878 | clear_insn_pattern (insn_pattern *p) |
| 879 | { |
| 880 | clear_insn_templ (&p->t); |
| 881 | clear_precond_list (&p->preconds); |
| 882 | } |
| 883 | |
| 884 | |
| 885 | static void |
| 886 | init_insn_repl (insn_repl *r) |
| 887 | { |
| 888 | r->head = NULL; |
| 889 | r->tail = &r->head; |
| 890 | } |
| 891 | |
| 892 | |
| 893 | static void |
| 894 | clear_insn_repl (insn_repl *r) |
| 895 | { |
| 896 | insn_repl_e *e; |
| 897 | |
| 898 | while (r->head != NULL) |
| 899 | { |
| 900 | e = r->head; |
| 901 | r->head = e->next; |
| 902 | clear_insn_templ (&e->t); |
| 903 | } |
| 904 | r->tail = &r->head; |
| 905 | } |
| 906 | |
| 907 | |
| 908 | static int |
| 909 | insn_templ_operand_count (const insn_templ *t) |
| 910 | { |
| 911 | int i = 0; |
| 912 | const opname_map_e *op; |
| 913 | |
| 914 | for (op = t->operand_map.head; op != NULL; op = op->next, i++) |
| 915 | ; |
| 916 | return i; |
| 917 | } |
| 918 | |
| 919 | |
| 920 | /* Convert a string to a number. E.G.: parse_constant("10", &num) */ |
| 921 | |
| 922 | static bfd_boolean |
| 923 | parse_constant (const char *in, unsigned *val_p) |
| 924 | { |
| 925 | unsigned val = 0; |
| 926 | const char *p; |
| 927 | |
| 928 | if (in == NULL) |
| 929 | return FALSE; |
| 930 | p = in; |
| 931 | |
| 932 | while (*p != '\0') |
| 933 | { |
| 934 | if (*p >= '0' && *p <= '9') |
| 935 | val = val * 10 + (*p - '0'); |
| 936 | else |
| 937 | return FALSE; |
| 938 | ++p; |
| 939 | } |
| 940 | *val_p = val; |
| 941 | return TRUE; |
| 942 | } |
| 943 | |
| 944 | |
| 945 | /* Match a pattern like "foo1" with |
| 946 | parse_id_constant("foo1", "foo", &num). |
| 947 | This may also be used to just match a number. */ |
| 948 | |
| 949 | static bfd_boolean |
| 950 | parse_id_constant (const char *in, const char *name, unsigned *val_p) |
| 951 | { |
| 952 | unsigned namelen = 0; |
| 953 | const char *p; |
| 954 | |
| 955 | if (in == NULL) |
| 956 | return FALSE; |
| 957 | |
| 958 | if (name != NULL) |
| 959 | namelen = strlen (name); |
| 960 | |
| 961 | if (name != NULL && strncmp (in, name, namelen) != 0) |
| 962 | return FALSE; |
| 963 | |
| 964 | p = &in[namelen]; |
| 965 | return parse_constant (p, val_p); |
| 966 | } |
| 967 | |
| 968 | |
| 969 | static bfd_boolean |
| 970 | parse_special_fn (const char *name, |
| 971 | const char **fn_name_p, |
| 972 | const char **arg_name_p) |
| 973 | { |
| 974 | char *p_start; |
| 975 | const char *p_end; |
| 976 | |
| 977 | p_start = strchr (name, '('); |
| 978 | if (p_start == NULL) |
| 979 | return FALSE; |
| 980 | |
| 981 | p_end = strchr (p_start, ')'); |
| 982 | |
| 983 | if (p_end == NULL) |
| 984 | return FALSE; |
| 985 | |
| 986 | if (p_end[1] != '\0') |
| 987 | return FALSE; |
| 988 | |
| 989 | *fn_name_p = enter_opname_n (name, p_start - name); |
| 990 | *arg_name_p = enter_opname_n (p_start + 1, p_end - p_start - 1); |
| 991 | return TRUE; |
| 992 | } |
| 993 | |
| 994 | |
| 995 | static const char * |
| 996 | skip_white (const char *p) |
| 997 | { |
| 998 | if (p == NULL) |
| 999 | return p; |
| 1000 | while (*p == ' ') |
| 1001 | ++p; |
| 1002 | return p; |
| 1003 | } |
| 1004 | |
| 1005 | |
| 1006 | static void |
| 1007 | trim_whitespace (char *in) |
| 1008 | { |
| 1009 | char *last_white = NULL; |
| 1010 | char *p = in; |
| 1011 | |
| 1012 | while (p && *p != '\0') |
| 1013 | { |
| 1014 | while (*p == ' ') |
| 1015 | { |
| 1016 | if (last_white == NULL) |
| 1017 | last_white = p; |
| 1018 | p++; |
| 1019 | } |
| 1020 | if (*p != '\0') |
| 1021 | { |
| 1022 | last_white = NULL; |
| 1023 | p++; |
| 1024 | } |
| 1025 | } |
| 1026 | if (last_white) |
| 1027 | *last_white = '\0'; |
| 1028 | } |
| 1029 | |
| 1030 | |
| 1031 | /* Split a string into component strings where "c" is the |
| 1032 | delimiter. Place the result in the split_rec. */ |
| 1033 | |
| 1034 | static void |
| 1035 | split_string (split_rec *rec, |
| 1036 | const char *in, |
| 1037 | char c, |
| 1038 | bfd_boolean elide_whitespace) |
| 1039 | { |
| 1040 | int cnt = 0; |
| 1041 | int i; |
| 1042 | const char *p = in; |
| 1043 | |
| 1044 | while (p != NULL && *p != '\0') |
| 1045 | { |
| 1046 | cnt++; |
| 1047 | p = strchr (p, c); |
| 1048 | if (p) |
| 1049 | p++; |
| 1050 | } |
| 1051 | rec->count = cnt; |
| 1052 | rec->vec = NULL; |
| 1053 | |
| 1054 | if (rec->count == 0) |
| 1055 | return; |
| 1056 | |
| 1057 | rec->vec = (char **) xmalloc (sizeof (char *) * cnt); |
| 1058 | for (i = 0; i < cnt; i++) |
| 1059 | rec->vec[i] = 0; |
| 1060 | |
| 1061 | p = in; |
| 1062 | for (i = 0; i < cnt; i++) |
| 1063 | { |
| 1064 | const char *q; |
| 1065 | int len; |
| 1066 | |
| 1067 | q = p; |
| 1068 | if (elide_whitespace) |
| 1069 | q = skip_white (q); |
| 1070 | |
| 1071 | p = strchr (q, c); |
| 1072 | if (p == NULL) |
| 1073 | rec->vec[i] = xstrdup (q); |
| 1074 | else |
| 1075 | { |
| 1076 | len = p - q; |
| 1077 | rec->vec[i] = (char *) xmalloc (sizeof (char) * (len + 1)); |
| 1078 | strncpy (rec->vec[i], q, len); |
| 1079 | rec->vec[i][len] = '\0'; |
| 1080 | p++; |
| 1081 | } |
| 1082 | |
| 1083 | if (elide_whitespace) |
| 1084 | trim_whitespace (rec->vec[i]); |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | |
| 1089 | static void |
| 1090 | clear_split_rec (split_rec *rec) |
| 1091 | { |
| 1092 | int i; |
| 1093 | |
| 1094 | for (i = 0; i < rec->count; i++) |
| 1095 | free (rec->vec[i]); |
| 1096 | |
| 1097 | if (rec->count > 0) |
| 1098 | free (rec->vec); |
| 1099 | } |
| 1100 | |
| 1101 | |
| 1102 | /* Initialize a split record. The split record must be initialized |
| 1103 | before split_string is called. */ |
| 1104 | |
| 1105 | static void |
| 1106 | init_split_rec (split_rec *rec) |
| 1107 | { |
| 1108 | rec->vec = NULL; |
| 1109 | rec->count = 0; |
| 1110 | } |
| 1111 | |
| 1112 | |
| 1113 | /* Parse an instruction template like "insn op1, op2, op3". */ |
| 1114 | |
| 1115 | static bfd_boolean |
| 1116 | parse_insn_templ (const char *s, insn_templ *t) |
| 1117 | { |
| 1118 | const char *p = s; |
| 1119 | int insn_name_len; |
| 1120 | split_rec oprec; |
| 1121 | int i; |
| 1122 | |
| 1123 | /* First find the first whitespace. */ |
| 1124 | |
| 1125 | init_split_rec (&oprec); |
| 1126 | |
| 1127 | p = skip_white (p); |
| 1128 | insn_name_len = strcspn (s, " "); |
| 1129 | if (insn_name_len == 0) |
| 1130 | return FALSE; |
| 1131 | |
| 1132 | init_insn_templ (t); |
| 1133 | t->opcode_name = enter_opname_n (p, insn_name_len); |
| 1134 | |
| 1135 | p = p + insn_name_len; |
| 1136 | |
| 1137 | /* Split by ',' and skip beginning and trailing whitespace. */ |
| 1138 | split_string (&oprec, p, ',', TRUE); |
| 1139 | |
| 1140 | for (i = 0; i < oprec.count; i++) |
| 1141 | { |
| 1142 | const char *opname = oprec.vec[i]; |
| 1143 | opname_map_e *e = (opname_map_e *) xmalloc (sizeof (opname_map_e)); |
| 1144 | e->next = NULL; |
| 1145 | e->operand_name = NULL; |
| 1146 | e->constant_value = 0; |
| 1147 | e->operand_num = i; |
| 1148 | |
| 1149 | /* If it begins with a number, assume that it is a number. */ |
| 1150 | if (opname && opname[0] >= '0' && opname[0] <= '9') |
| 1151 | { |
| 1152 | unsigned val; |
| 1153 | |
| 1154 | if (parse_constant (opname, &val)) |
| 1155 | e->constant_value = val; |
| 1156 | else |
| 1157 | { |
| 1158 | free (e); |
| 1159 | clear_split_rec (&oprec); |
| 1160 | clear_insn_templ (t); |
| 1161 | return FALSE; |
| 1162 | } |
| 1163 | } |
| 1164 | else |
| 1165 | e->operand_name = enter_opname (oprec.vec[i]); |
| 1166 | |
| 1167 | *t->operand_map.tail = e; |
| 1168 | t->operand_map.tail = &e->next; |
| 1169 | } |
| 1170 | clear_split_rec (&oprec); |
| 1171 | return TRUE; |
| 1172 | } |
| 1173 | |
| 1174 | |
| 1175 | static bfd_boolean |
| 1176 | parse_precond (const char *s, precond_e *precond) |
| 1177 | { |
| 1178 | /* All preconditions are currently of the form: |
| 1179 | a == b or a != b or a == k (where k is a constant). |
| 1180 | Later we may use some special functions like DENSITY == 1 |
| 1181 | to identify when density is available. */ |
| 1182 | |
| 1183 | const char *p = s; |
| 1184 | int len; |
| 1185 | precond->opname1 = NULL; |
| 1186 | precond->opval1 = 0; |
| 1187 | precond->cmpop = OP_EQUAL; |
| 1188 | precond->opname2 = NULL; |
| 1189 | precond->opval2 = 0; |
| 1190 | precond->next = NULL; |
| 1191 | |
| 1192 | p = skip_white (p); |
| 1193 | |
| 1194 | len = strcspn (p, " !="); |
| 1195 | |
| 1196 | if (len == 0) |
| 1197 | return FALSE; |
| 1198 | |
| 1199 | precond->opname1 = enter_opname_n (p, len); |
| 1200 | p = p + len; |
| 1201 | p = skip_white (p); |
| 1202 | |
| 1203 | /* Check for "==" and "!=". */ |
| 1204 | if (strncmp (p, "==", 2) == 0) |
| 1205 | precond->cmpop = OP_EQUAL; |
| 1206 | else if (strncmp (p, "!=", 2) == 0) |
| 1207 | precond->cmpop = OP_NOTEQUAL; |
| 1208 | else |
| 1209 | return FALSE; |
| 1210 | |
| 1211 | p = p + 2; |
| 1212 | p = skip_white (p); |
| 1213 | |
| 1214 | /* No trailing whitespace from earlier parsing. */ |
| 1215 | if (p[0] >= '0' && p[0] <= '9') |
| 1216 | { |
| 1217 | unsigned val; |
| 1218 | if (parse_constant (p, &val)) |
| 1219 | precond->opval2 = val; |
| 1220 | else |
| 1221 | return FALSE; |
| 1222 | } |
| 1223 | else |
| 1224 | precond->opname2 = enter_opname (p); |
| 1225 | return TRUE; |
| 1226 | } |
| 1227 | |
| 1228 | |
| 1229 | static void |
| 1230 | clear_req_or_option_list (ReqOrOption **r_p) |
| 1231 | { |
| 1232 | if (*r_p == NULL) |
| 1233 | return; |
| 1234 | |
| 1235 | free ((*r_p)->option_name); |
| 1236 | clear_req_or_option_list (&(*r_p)->next); |
| 1237 | *r_p = NULL; |
| 1238 | } |
| 1239 | |
| 1240 | |
| 1241 | static void |
| 1242 | clear_req_option_list (ReqOption **r_p) |
| 1243 | { |
| 1244 | if (*r_p == NULL) |
| 1245 | return; |
| 1246 | |
| 1247 | clear_req_or_option_list (&(*r_p)->or_option_terms); |
| 1248 | clear_req_option_list (&(*r_p)->next); |
| 1249 | *r_p = NULL; |
| 1250 | } |
| 1251 | |
| 1252 | |
| 1253 | static ReqOrOption * |
| 1254 | clone_req_or_option_list (ReqOrOption *req_or_option) |
| 1255 | { |
| 1256 | ReqOrOption *new_req_or_option; |
| 1257 | |
| 1258 | if (req_or_option == NULL) |
| 1259 | return NULL; |
| 1260 | |
| 1261 | new_req_or_option = (ReqOrOption *) xmalloc (sizeof (ReqOrOption)); |
| 1262 | new_req_or_option->option_name = xstrdup (req_or_option->option_name); |
| 1263 | new_req_or_option->is_true = req_or_option->is_true; |
| 1264 | new_req_or_option->next = NULL; |
| 1265 | new_req_or_option->next = clone_req_or_option_list (req_or_option->next); |
| 1266 | return new_req_or_option; |
| 1267 | } |
| 1268 | |
| 1269 | |
| 1270 | static ReqOption * |
| 1271 | clone_req_option_list (ReqOption *req_option) |
| 1272 | { |
| 1273 | ReqOption *new_req_option; |
| 1274 | |
| 1275 | if (req_option == NULL) |
| 1276 | return NULL; |
| 1277 | |
| 1278 | new_req_option = (ReqOption *) xmalloc (sizeof (ReqOption)); |
| 1279 | new_req_option->or_option_terms = NULL; |
| 1280 | new_req_option->next = NULL; |
| 1281 | new_req_option->or_option_terms = |
| 1282 | clone_req_or_option_list (req_option->or_option_terms); |
| 1283 | new_req_option->next = clone_req_option_list (req_option->next); |
| 1284 | return new_req_option; |
| 1285 | } |
| 1286 | |
| 1287 | |
| 1288 | static bfd_boolean |
| 1289 | parse_option_cond (const char *s, ReqOption *option) |
| 1290 | { |
| 1291 | int i; |
| 1292 | split_rec option_term_rec; |
| 1293 | |
| 1294 | /* All option or conditions are of the form: |
| 1295 | optionA + no-optionB + ... |
| 1296 | "Ands" are divided by "?". */ |
| 1297 | |
| 1298 | init_split_rec (&option_term_rec); |
| 1299 | split_string (&option_term_rec, s, '+', TRUE); |
| 1300 | |
| 1301 | if (option_term_rec.count == 0) |
| 1302 | { |
| 1303 | clear_split_rec (&option_term_rec); |
| 1304 | return FALSE; |
| 1305 | } |
| 1306 | |
| 1307 | for (i = 0; i < option_term_rec.count; i++) |
| 1308 | { |
| 1309 | char *option_name = option_term_rec.vec[i]; |
| 1310 | bfd_boolean is_true = TRUE; |
| 1311 | ReqOrOption *req; |
| 1312 | ReqOrOption **r_p; |
| 1313 | |
| 1314 | if (strncmp (option_name, "no-", 3) == 0) |
| 1315 | { |
| 1316 | option_name = xstrdup (&option_name[3]); |
| 1317 | is_true = FALSE; |
| 1318 | } |
| 1319 | else |
| 1320 | option_name = xstrdup (option_name); |
| 1321 | |
| 1322 | req = (ReqOrOption *) xmalloc (sizeof (ReqOrOption)); |
| 1323 | req->option_name = option_name; |
| 1324 | req->is_true = is_true; |
| 1325 | req->next = NULL; |
| 1326 | |
| 1327 | /* Append to list. */ |
| 1328 | for (r_p = &option->or_option_terms; (*r_p) != NULL; |
| 1329 | r_p = &(*r_p)->next) |
| 1330 | ; |
| 1331 | (*r_p) = req; |
| 1332 | } |
| 1333 | return TRUE; |
| 1334 | } |
| 1335 | |
| 1336 | |
| 1337 | /* Parse a string like: |
| 1338 | "insn op1, op2, op3, op4 | op1 != op2 | op2 == op3 | op4 == 1". |
| 1339 | I.E., instruction "insn" with 4 operands where operand 1 and 2 are not |
| 1340 | the same and operand 2 and 3 are the same and operand 4 is 1. |
| 1341 | |
| 1342 | or: |
| 1343 | |
| 1344 | "insn op1 | op1 == 1 / density + boolean / no-useroption". |
| 1345 | i.e. instruction "insn" with 1 operands where operand 1 is 1 |
| 1346 | when "density" or "boolean" options are available and |
| 1347 | "useroption" is not available. |
| 1348 | |
| 1349 | Because the current implementation of this parsing scheme uses |
| 1350 | split_string, it requires that '|' and '?' are only used as |
| 1351 | delimiters for predicates and required options. */ |
| 1352 | |
| 1353 | static bfd_boolean |
| 1354 | parse_insn_pattern (const char *in, insn_pattern *insn) |
| 1355 | { |
| 1356 | split_rec rec; |
| 1357 | split_rec optionrec; |
| 1358 | int i; |
| 1359 | |
| 1360 | init_insn_pattern (insn); |
| 1361 | |
| 1362 | init_split_rec (&optionrec); |
| 1363 | split_string (&optionrec, in, '?', TRUE); |
| 1364 | if (optionrec.count == 0) |
| 1365 | { |
| 1366 | clear_split_rec (&optionrec); |
| 1367 | return FALSE; |
| 1368 | } |
| 1369 | |
| 1370 | init_split_rec (&rec); |
| 1371 | |
| 1372 | split_string (&rec, optionrec.vec[0], '|', TRUE); |
| 1373 | |
| 1374 | if (rec.count == 0) |
| 1375 | { |
| 1376 | clear_split_rec (&rec); |
| 1377 | clear_split_rec (&optionrec); |
| 1378 | return FALSE; |
| 1379 | } |
| 1380 | |
| 1381 | if (!parse_insn_templ (rec.vec[0], &insn->t)) |
| 1382 | { |
| 1383 | clear_split_rec (&rec); |
| 1384 | clear_split_rec (&optionrec); |
| 1385 | return FALSE; |
| 1386 | } |
| 1387 | |
| 1388 | for (i = 1; i < rec.count; i++) |
| 1389 | { |
| 1390 | precond_e *cond = (precond_e *) xmalloc (sizeof (precond_e)); |
| 1391 | |
| 1392 | if (!parse_precond (rec.vec[i], cond)) |
| 1393 | { |
| 1394 | clear_split_rec (&rec); |
| 1395 | clear_split_rec (&optionrec); |
| 1396 | clear_insn_pattern (insn); |
| 1397 | return FALSE; |
| 1398 | } |
| 1399 | |
| 1400 | /* Append the condition. */ |
| 1401 | *insn->preconds.tail = cond; |
| 1402 | insn->preconds.tail = &cond->next; |
| 1403 | } |
| 1404 | |
| 1405 | for (i = 1; i < optionrec.count; i++) |
| 1406 | { |
| 1407 | /* Handle the option conditions. */ |
| 1408 | ReqOption **r_p; |
| 1409 | ReqOption *req_option = (ReqOption *) xmalloc (sizeof (ReqOption)); |
| 1410 | req_option->or_option_terms = NULL; |
| 1411 | req_option->next = NULL; |
| 1412 | |
| 1413 | if (!parse_option_cond (optionrec.vec[i], req_option)) |
| 1414 | { |
| 1415 | clear_split_rec (&rec); |
| 1416 | clear_split_rec (&optionrec); |
| 1417 | clear_insn_pattern (insn); |
| 1418 | clear_req_option_list (&req_option); |
| 1419 | return FALSE; |
| 1420 | } |
| 1421 | |
| 1422 | /* Append the condition. */ |
| 1423 | for (r_p = &insn->options; (*r_p) != NULL; r_p = &(*r_p)->next) |
| 1424 | ; |
| 1425 | |
| 1426 | (*r_p) = req_option; |
| 1427 | } |
| 1428 | |
| 1429 | clear_split_rec (&rec); |
| 1430 | clear_split_rec (&optionrec); |
| 1431 | return TRUE; |
| 1432 | } |
| 1433 | |
| 1434 | |
| 1435 | static bfd_boolean |
| 1436 | parse_insn_repl (const char *in, insn_repl *r_p) |
| 1437 | { |
| 1438 | /* This is a list of instruction templates separated by ';'. */ |
| 1439 | split_rec rec; |
| 1440 | int i; |
| 1441 | |
| 1442 | split_string (&rec, in, ';', TRUE); |
| 1443 | |
| 1444 | for (i = 0; i < rec.count; i++) |
| 1445 | { |
| 1446 | insn_repl_e *e = (insn_repl_e *) xmalloc (sizeof (insn_repl_e)); |
| 1447 | |
| 1448 | e->next = NULL; |
| 1449 | |
| 1450 | if (!parse_insn_templ (rec.vec[i], &e->t)) |
| 1451 | { |
| 1452 | free (e); |
| 1453 | clear_insn_repl (r_p); |
| 1454 | return FALSE; |
| 1455 | } |
| 1456 | *r_p->tail = e; |
| 1457 | r_p->tail = &e->next; |
| 1458 | } |
| 1459 | return TRUE; |
| 1460 | } |
| 1461 | |
| 1462 | |
| 1463 | static bfd_boolean |
| 1464 | transition_applies (insn_pattern *initial_insn, |
| 1465 | const char *from_string ATTRIBUTE_UNUSED, |
| 1466 | const char *to_string ATTRIBUTE_UNUSED) |
| 1467 | { |
| 1468 | ReqOption *req_option; |
| 1469 | |
| 1470 | for (req_option = initial_insn->options; |
| 1471 | req_option != NULL; |
| 1472 | req_option = req_option->next) |
| 1473 | { |
| 1474 | ReqOrOption *req_or_option = req_option->or_option_terms; |
| 1475 | |
| 1476 | if (req_or_option == NULL |
| 1477 | || req_or_option->next != NULL) |
| 1478 | continue; |
| 1479 | |
| 1480 | if (strncmp (req_or_option->option_name, "IsaUse", 6) == 0) |
| 1481 | { |
| 1482 | bfd_boolean option_available = FALSE; |
| 1483 | char *option_name = req_or_option->option_name + 6; |
| 1484 | if (!strcmp (option_name, "DensityInstruction")) |
| 1485 | option_available = (XCHAL_HAVE_DENSITY == 1); |
| 1486 | else if (!strcmp (option_name, "L32R")) |
| 1487 | option_available = (XCHAL_HAVE_L32R == 1); |
| 1488 | else if (!strcmp (option_name, "Const16")) |
| 1489 | option_available = (XCHAL_HAVE_CONST16 == 1); |
| 1490 | else if (!strcmp (option_name, "Loops")) |
| 1491 | option_available = (XCHAL_HAVE_LOOPS == 1); |
| 1492 | else if (!strcmp (option_name, "PredictedBranches")) |
| 1493 | option_available = (XCHAL_HAVE_PREDICTED_BRANCHES == 1); |
| 1494 | else if (!strcmp (option_name, "Booleans")) |
| 1495 | option_available = (XCHAL_HAVE_BOOLEANS == 1); |
| 1496 | else |
| 1497 | as_warn (_("invalid configuration option '%s' in transition rule '%s'"), |
| 1498 | req_or_option->option_name, from_string); |
| 1499 | if ((option_available ^ req_or_option->is_true) != 0) |
| 1500 | return FALSE; |
| 1501 | } |
| 1502 | else if (strcmp (req_or_option->option_name, "realnop") == 0) |
| 1503 | { |
| 1504 | bfd_boolean nop_available = |
| 1505 | (xtensa_opcode_lookup (xtensa_default_isa, "nop") |
| 1506 | != XTENSA_UNDEFINED); |
| 1507 | if ((nop_available ^ req_or_option->is_true) != 0) |
| 1508 | return FALSE; |
| 1509 | } |
| 1510 | } |
| 1511 | return TRUE; |
| 1512 | } |
| 1513 | |
| 1514 | |
| 1515 | static TransitionRule * |
| 1516 | build_transition (insn_pattern *initial_insn, |
| 1517 | insn_repl *replace_insns, |
| 1518 | const char *from_string, |
| 1519 | const char *to_string) |
| 1520 | { |
| 1521 | TransitionRule *tr = NULL; |
| 1522 | xtensa_opcode opcode; |
| 1523 | xtensa_isa isa = xtensa_default_isa; |
| 1524 | |
| 1525 | opname_map_e *op1; |
| 1526 | opname_map_e *op2; |
| 1527 | |
| 1528 | precond_e *precond; |
| 1529 | insn_repl_e *r; |
| 1530 | unsigned label_count = 0; |
| 1531 | unsigned max_label_count = 0; |
| 1532 | bfd_boolean has_label = FALSE; |
| 1533 | unsigned literal_count = 0; |
| 1534 | |
| 1535 | opcode = xtensa_opcode_lookup (isa, initial_insn->t.opcode_name); |
| 1536 | if (opcode == XTENSA_UNDEFINED) |
| 1537 | { |
| 1538 | /* It is OK to not be able to translate some of these opcodes. */ |
| 1539 | return NULL; |
| 1540 | } |
| 1541 | |
| 1542 | |
| 1543 | if (xtensa_opcode_num_operands (isa, opcode) |
| 1544 | != insn_templ_operand_count (&initial_insn->t)) |
| 1545 | { |
| 1546 | /* This is also OK because there are opcodes that |
| 1547 | have different numbers of operands on different |
| 1548 | architecture variations. */ |
| 1549 | return NULL; |
| 1550 | } |
| 1551 | |
| 1552 | tr = (TransitionRule *) xmalloc (sizeof (TransitionRule)); |
| 1553 | tr->opcode = opcode; |
| 1554 | tr->conditions = NULL; |
| 1555 | tr->to_instr = NULL; |
| 1556 | |
| 1557 | /* Build the conditions. First, equivalent operand condition.... */ |
| 1558 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) |
| 1559 | { |
| 1560 | for (op2 = op1->next; op2 != NULL; op2 = op2->next) |
| 1561 | { |
| 1562 | if (same_operand_name (op1, op2)) |
| 1563 | { |
| 1564 | append_value_condition (tr, OP_EQUAL, |
| 1565 | op1->operand_num, op2->operand_num); |
| 1566 | } |
| 1567 | } |
| 1568 | } |
| 1569 | |
| 1570 | /* Now the condition that an operand value must be a constant.... */ |
| 1571 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) |
| 1572 | { |
| 1573 | if (op_is_constant (op1)) |
| 1574 | { |
| 1575 | append_constant_value_condition (tr, |
| 1576 | OP_EQUAL, |
| 1577 | op1->operand_num, |
| 1578 | op_get_constant (op1)); |
| 1579 | } |
| 1580 | } |
| 1581 | |
| 1582 | |
| 1583 | /* Now add the explicit preconditions listed after the "|" in the spec. |
| 1584 | These are currently very limited, so we do a special case |
| 1585 | parse for them. We expect spaces, opname != opname. */ |
| 1586 | for (precond = initial_insn->preconds.head; |
| 1587 | precond != NULL; |
| 1588 | precond = precond->next) |
| 1589 | { |
| 1590 | op1 = NULL; |
| 1591 | op2 = NULL; |
| 1592 | |
| 1593 | if (precond->opname1) |
| 1594 | { |
| 1595 | op1 = get_opmatch (&initial_insn->t.operand_map, precond->opname1); |
| 1596 | if (op1 == NULL) |
| 1597 | { |
| 1598 | as_fatal (_("opcode '%s': no bound opname '%s' " |
| 1599 | "for precondition in '%s'"), |
| 1600 | xtensa_opcode_name (isa, opcode), |
| 1601 | precond->opname1, from_string); |
| 1602 | return NULL; |
| 1603 | } |
| 1604 | } |
| 1605 | |
| 1606 | if (precond->opname2) |
| 1607 | { |
| 1608 | op2 = get_opmatch (&initial_insn->t.operand_map, precond->opname2); |
| 1609 | if (op2 == NULL) |
| 1610 | { |
| 1611 | as_fatal (_("opcode '%s': no bound opname '%s' " |
| 1612 | "for precondition in %s"), |
| 1613 | xtensa_opcode_name (isa, opcode), |
| 1614 | precond->opname2, from_string); |
| 1615 | return NULL; |
| 1616 | } |
| 1617 | } |
| 1618 | |
| 1619 | if (op1 == NULL && op2 == NULL) |
| 1620 | { |
| 1621 | as_fatal (_("opcode '%s': precondition only contains " |
| 1622 | "constants in '%s'"), |
| 1623 | xtensa_opcode_name (isa, opcode), from_string); |
| 1624 | return NULL; |
| 1625 | } |
| 1626 | else if (op1 != NULL && op2 != NULL) |
| 1627 | append_value_condition (tr, precond->cmpop, |
| 1628 | op1->operand_num, op2->operand_num); |
| 1629 | else if (op2 == NULL) |
| 1630 | append_constant_value_condition (tr, precond->cmpop, |
| 1631 | op1->operand_num, precond->opval2); |
| 1632 | else |
| 1633 | append_constant_value_condition (tr, precond->cmpop, |
| 1634 | op2->operand_num, precond->opval1); |
| 1635 | } |
| 1636 | |
| 1637 | tr->options = clone_req_option_list (initial_insn->options); |
| 1638 | |
| 1639 | /* Generate the replacement instructions. Some of these |
| 1640 | "instructions" are actually labels and literals. The literals |
| 1641 | must be defined in order 0..n and a literal must be defined |
| 1642 | (e.g., "LITERAL0 %imm") before use (e.g., "%LITERAL0"). The |
| 1643 | labels must be defined in order, but they can be used before they |
| 1644 | are defined. Also there are a number of special operands (e.g., |
| 1645 | HI24S). */ |
| 1646 | |
| 1647 | for (r = replace_insns->head; r != NULL; r = r->next) |
| 1648 | { |
| 1649 | BuildInstr *bi; |
| 1650 | const char *opcode_name; |
| 1651 | int operand_count; |
| 1652 | opname_map_e *op; |
| 1653 | unsigned idnum = 0; |
| 1654 | const char *fn_name; |
| 1655 | const char *operand_arg_name; |
| 1656 | |
| 1657 | bi = (BuildInstr *) xmalloc (sizeof (BuildInstr)); |
| 1658 | append_build_insn (tr, bi); |
| 1659 | |
| 1660 | bi->id = 0; |
| 1661 | bi->opcode = XTENSA_UNDEFINED; |
| 1662 | bi->ops = NULL; |
| 1663 | bi->next = NULL; |
| 1664 | |
| 1665 | opcode_name = r->t.opcode_name; |
| 1666 | operand_count = insn_templ_operand_count (&r->t); |
| 1667 | |
| 1668 | if (parse_id_constant (opcode_name, "LITERAL", &idnum)) |
| 1669 | { |
| 1670 | bi->typ = INSTR_LITERAL_DEF; |
| 1671 | bi->id = idnum; |
| 1672 | if (idnum != literal_count) |
| 1673 | as_fatal (_("generated literals must be numbered consecutively")); |
| 1674 | ++literal_count; |
| 1675 | if (operand_count != 1) |
| 1676 | as_fatal (_("expected one operand for generated literal")); |
| 1677 | |
| 1678 | } |
| 1679 | else if (parse_id_constant (opcode_name, "LABEL", &idnum)) |
| 1680 | { |
| 1681 | bi->typ = INSTR_LABEL_DEF; |
| 1682 | bi->id = idnum; |
| 1683 | if (idnum != label_count) |
| 1684 | as_fatal (_("generated labels must be numbered consecutively")); |
| 1685 | ++label_count; |
| 1686 | if (operand_count != 0) |
| 1687 | as_fatal (_("expected 0 operands for generated label")); |
| 1688 | } |
| 1689 | else |
| 1690 | { |
| 1691 | bi->typ = INSTR_INSTR; |
| 1692 | bi->opcode = xtensa_opcode_lookup (isa, r->t.opcode_name); |
| 1693 | if (bi->opcode == XTENSA_UNDEFINED) |
| 1694 | { |
| 1695 | as_warn (_("invalid opcode '%s' in transition rule '%s'"), |
| 1696 | r->t.opcode_name, to_string); |
| 1697 | return NULL; |
| 1698 | } |
| 1699 | /* Check for the right number of ops. */ |
| 1700 | if (xtensa_opcode_num_operands (isa, bi->opcode) |
| 1701 | != (int) operand_count) |
| 1702 | as_fatal (_("opcode '%s': replacement does not have %d ops"), |
| 1703 | opcode_name, |
| 1704 | xtensa_opcode_num_operands (isa, bi->opcode)); |
| 1705 | } |
| 1706 | |
| 1707 | for (op = r->t.operand_map.head; op != NULL; op = op->next) |
| 1708 | { |
| 1709 | unsigned idnum; |
| 1710 | |
| 1711 | if (op_is_constant (op)) |
| 1712 | append_constant_op (bi, op->operand_num, op_get_constant (op)); |
| 1713 | else if (parse_id_constant (op->operand_name, "%LITERAL", &idnum)) |
| 1714 | { |
| 1715 | if (idnum >= literal_count) |
| 1716 | as_fatal (_("opcode %s: replacement " |
| 1717 | "literal %d >= literal_count(%d)"), |
| 1718 | opcode_name, idnum, literal_count); |
| 1719 | append_literal_op (bi, op->operand_num, idnum); |
| 1720 | } |
| 1721 | else if (parse_id_constant (op->operand_name, "%LABEL", &idnum)) |
| 1722 | { |
| 1723 | has_label = TRUE; |
| 1724 | if (idnum > max_label_count) |
| 1725 | max_label_count = idnum; |
| 1726 | append_label_op (bi, op->operand_num, idnum); |
| 1727 | } |
| 1728 | else if (parse_id_constant (op->operand_name, "a", &idnum)) |
| 1729 | append_constant_op (bi, op->operand_num, idnum); |
| 1730 | else if (op->operand_name[0] == '%') |
| 1731 | { |
| 1732 | opname_map_e *orig_op; |
| 1733 | orig_op = get_opmatch (&initial_insn->t.operand_map, |
| 1734 | op->operand_name); |
| 1735 | if (orig_op == NULL) |
| 1736 | { |
| 1737 | as_fatal (_("opcode %s: unidentified operand '%s' in '%s'"), |
| 1738 | opcode_name, op->operand_name, to_string); |
| 1739 | |
| 1740 | append_constant_op (bi, op->operand_num, 0); |
| 1741 | } |
| 1742 | else |
| 1743 | append_field_op (bi, op->operand_num, orig_op->operand_num); |
| 1744 | } |
| 1745 | else if (parse_special_fn (op->operand_name, |
| 1746 | &fn_name, &operand_arg_name)) |
| 1747 | { |
| 1748 | opname_map_e *orig_op; |
| 1749 | OpType typ = OP_CONSTANT; |
| 1750 | |
| 1751 | if (strcmp (fn_name, "LOW8") == 0) |
| 1752 | typ = OP_OPERAND_LOW8; |
| 1753 | else if (strcmp (fn_name, "HI24S") == 0) |
| 1754 | typ = OP_OPERAND_HI24S; |
| 1755 | else if (strcmp (fn_name, "F32MINUS") == 0) |
| 1756 | typ = OP_OPERAND_F32MINUS; |
| 1757 | else if (strcmp (fn_name, "LOW16U") == 0) |
| 1758 | typ = OP_OPERAND_LOW16U; |
| 1759 | else if (strcmp (fn_name, "HI16U") == 0) |
| 1760 | typ = OP_OPERAND_HI16U; |
| 1761 | else |
| 1762 | as_fatal (_("unknown user-defined function %s"), fn_name); |
| 1763 | |
| 1764 | orig_op = get_opmatch (&initial_insn->t.operand_map, |
| 1765 | operand_arg_name); |
| 1766 | if (orig_op == NULL) |
| 1767 | { |
| 1768 | as_fatal (_("opcode %s: unidentified operand '%s' in '%s'"), |
| 1769 | opcode_name, op->operand_name, to_string); |
| 1770 | append_constant_op (bi, op->operand_num, 0); |
| 1771 | } |
| 1772 | else |
| 1773 | append_user_fn_field_op (bi, op->operand_num, |
| 1774 | typ, orig_op->operand_num); |
| 1775 | } |
| 1776 | else |
| 1777 | { |
| 1778 | as_fatal (_("opcode %s: could not parse operand '%s' in '%s'"), |
| 1779 | opcode_name, op->operand_name, to_string); |
| 1780 | append_constant_op (bi, op->operand_num, 0); |
| 1781 | } |
| 1782 | } |
| 1783 | } |
| 1784 | if (has_label && max_label_count >= label_count) |
| 1785 | { |
| 1786 | as_fatal (_("opcode %s: replacement label %d >= label_count(%d)"), |
| 1787 | xtensa_opcode_name (isa, opcode), |
| 1788 | max_label_count, label_count); |
| 1789 | return NULL; |
| 1790 | } |
| 1791 | |
| 1792 | return tr; |
| 1793 | } |
| 1794 | |
| 1795 | |
| 1796 | static TransitionTable * |
| 1797 | build_transition_table (const string_pattern_pair *transitions, |
| 1798 | int transition_count, |
| 1799 | transition_cmp_fn cmp) |
| 1800 | { |
| 1801 | TransitionTable *table = NULL; |
| 1802 | int num_opcodes = xtensa_isa_num_opcodes (xtensa_default_isa); |
| 1803 | int i, tnum; |
| 1804 | |
| 1805 | if (table != NULL) |
| 1806 | return table; |
| 1807 | |
| 1808 | /* Otherwise, build it now. */ |
| 1809 | table = (TransitionTable *) xmalloc (sizeof (TransitionTable)); |
| 1810 | table->num_opcodes = num_opcodes; |
| 1811 | table->table = |
| 1812 | (TransitionList **) xmalloc (sizeof (TransitionTable *) * num_opcodes); |
| 1813 | |
| 1814 | for (i = 0; i < num_opcodes; i++) |
| 1815 | table->table[i] = NULL; |
| 1816 | |
| 1817 | for (tnum = 0; tnum < transition_count; tnum++) |
| 1818 | { |
| 1819 | const char *from_string = transitions[tnum].pattern; |
| 1820 | const char *to_string = transitions[tnum].replacement; |
| 1821 | |
| 1822 | insn_pattern initial_insn; |
| 1823 | insn_repl replace_insns; |
| 1824 | TransitionRule *tr; |
| 1825 | |
| 1826 | init_insn_pattern (&initial_insn); |
| 1827 | if (!parse_insn_pattern (from_string, &initial_insn)) |
| 1828 | { |
| 1829 | as_fatal (_("could not parse INSN_PATTERN '%s'"), from_string); |
| 1830 | clear_insn_pattern (&initial_insn); |
| 1831 | continue; |
| 1832 | } |
| 1833 | |
| 1834 | init_insn_repl (&replace_insns); |
| 1835 | if (!parse_insn_repl (to_string, &replace_insns)) |
| 1836 | { |
| 1837 | as_fatal (_("could not parse INSN_REPL '%s'"), to_string); |
| 1838 | clear_insn_pattern (&initial_insn); |
| 1839 | clear_insn_repl (&replace_insns); |
| 1840 | continue; |
| 1841 | } |
| 1842 | |
| 1843 | if (transition_applies (&initial_insn, from_string, to_string)) |
| 1844 | { |
| 1845 | tr = build_transition (&initial_insn, &replace_insns, |
| 1846 | from_string, to_string); |
| 1847 | if (tr) |
| 1848 | append_transition (table, tr->opcode, tr, cmp); |
| 1849 | else |
| 1850 | { |
| 1851 | #if TENSILICA_DEBUG |
| 1852 | as_warn (_("could not build transition for %s => %s"), |
| 1853 | from_string, to_string); |
| 1854 | #endif |
| 1855 | } |
| 1856 | } |
| 1857 | |
| 1858 | clear_insn_repl (&replace_insns); |
| 1859 | clear_insn_pattern (&initial_insn); |
| 1860 | } |
| 1861 | return table; |
| 1862 | } |
| 1863 | |
| 1864 | \f |
| 1865 | extern TransitionTable * |
| 1866 | xg_build_widen_table (transition_cmp_fn cmp) |
| 1867 | { |
| 1868 | static TransitionTable *table = NULL; |
| 1869 | if (table == NULL) |
| 1870 | table = build_transition_table (widen_spec_list, WIDEN_COUNT, cmp); |
| 1871 | return table; |
| 1872 | } |
| 1873 | |
| 1874 | |
| 1875 | extern TransitionTable * |
| 1876 | xg_build_simplify_table (transition_cmp_fn cmp) |
| 1877 | { |
| 1878 | static TransitionTable *table = NULL; |
| 1879 | if (table == NULL) |
| 1880 | table = build_transition_table (simplify_spec_list, SIMPLIFY_COUNT, cmp); |
| 1881 | return table; |
| 1882 | } |