Mercurial > hg-old > index.cgi
annotate src/pseudo.c @ 22:b704f7ffc8ba
Added reading of input file for pass1
| author | lost |
|---|---|
| date | Fri, 02 Jan 2009 00:43:19 +0000 |
| parents | 34568fab6058 |
| children | 804d7465e0f9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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34568fab6058
Fixed package to include all required files; also added copyright preamble to all source files
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2 pseudo.c |
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3 Copyright © 2008 William Astle |
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4 |
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5 This file is part of LWASM. |
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6 |
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7 LWASM is free software: you can redistribute it and/or modify it under the |
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8 terms of the GNU General Public License as published by the Free Software |
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34568fab6058
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9 Foundation, either version 3 of the License, or (at your option) any later |
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34568fab6058
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10 version. |
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11 |
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12 This program is distributed in the hope that it will be useful, but WITHOUT |
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34568fab6058
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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34568fab6058
Fixed package to include all required files; also added copyright preamble to all source files
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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34568fab6058
Fixed package to include all required files; also added copyright preamble to all source files
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15 more details. |
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34568fab6058
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16 |
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34568fab6058
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17 You should have received a copy of the GNU General Public License along with |
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34568fab6058
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18 this program. If not, see <http://www.gnu.org/licenses/>. |
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34568fab6058
Fixed package to include all required files; also added copyright preamble to all source files
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19 |
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34568fab6058
Fixed package to include all required files; also added copyright preamble to all source files
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20 |
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34568fab6058
Fixed package to include all required files; also added copyright preamble to all source files
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21 This file implements the various pseudo operations. |
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34568fab6058
Fixed package to include all required files; also added copyright preamble to all source files
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22 */ |
| 0 | 23 |
| 24 #include <ctype.h> | |
| 25 #include <stdlib.h> | |
| 26 #include <string.h> | |
| 27 #include "lwasm.h" | |
| 28 #include "instab.h" | |
| 29 | |
| 30 #include <stdio.h> | |
| 31 | |
| 32 void pseudo_org(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 33 { | |
| 34 int v1, rval; | |
| 35 | |
| 36 if (cl -> hassym) | |
| 37 { | |
| 38 register_error(as, cl, ERR_SYM); | |
| 39 cl -> hassym = 0; | |
| 40 } | |
| 41 rval = eval_expr(as, cl, optr, &v1); | |
| 42 cl -> addr = v1; | |
| 43 cl -> addrset = 1; | |
| 44 as -> addr = v1; | |
| 45 } | |
| 46 | |
| 47 void pseudo_include(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 48 { | |
| 49 int v1; | |
| 50 | |
| 51 if (as -> passnum != 1) | |
| 52 return; | |
| 53 while (**optr && isspace(**optr)) | |
| 54 (*optr)++; | |
| 55 if (!**optr) | |
| 56 { | |
| 57 register_error(as, cl, ERR_BADFN); | |
| 58 return; | |
| 59 } | |
| 60 for (v1 = 0; *((*optr)+v1) && !isspace(*((*optr)+v1)); v1++) | |
| 61 ; | |
| 62 { | |
| 63 char *fn = malloc(v1 + 1); | |
| 64 strncpy(fn, *optr, v1); | |
| 65 fn[v1] = '\0'; | |
| 66 lwasm_read_file(as, fn); | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 | |
| 71 void pseudo_rmb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 72 { | |
| 73 int rval, v1; | |
| 74 | |
| 75 rval = eval_expr(as, cl, optr, &v1); | |
| 76 if (rval < 0) | |
| 77 { | |
| 78 errorp1(ERR_FORWARD); | |
| 79 return; | |
| 80 } | |
| 81 if (v1 < 0) | |
| 82 { | |
| 83 errorp1(ERR_BADOPER); | |
| 84 return; | |
| 85 } | |
| 86 cl -> len = v1; | |
| 87 cl -> nocode = 1; | |
| 88 } | |
| 89 | |
| 90 void pseudo_rmd(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 91 { | |
| 92 int rval, v1; | |
| 93 | |
| 94 rval = eval_expr(as, cl, optr, &v1); | |
| 95 if (rval < 0) | |
| 96 { | |
| 97 errorp1(ERR_FORWARD); | |
| 98 return; | |
| 99 } | |
| 100 if (v1 < 0) | |
| 101 { | |
| 102 errorp1(ERR_BADOPER); | |
| 103 return; | |
| 104 } | |
| 105 cl -> len = v1 * 2; | |
| 106 cl -> nocode = 1; | |
| 107 } | |
| 108 | |
| 109 void pseudo_rmq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 110 { | |
| 111 int rval, v1; | |
| 112 | |
| 113 rval = eval_expr(as, cl, optr, &v1); | |
| 114 if (rval < 0) | |
| 115 { | |
| 116 errorp1(ERR_FORWARD); | |
| 117 return; | |
| 118 } | |
| 119 if (v1 < 0) | |
| 120 { | |
| 121 errorp1(ERR_BADOPER); | |
| 122 return; | |
| 123 } | |
| 124 cl -> len = v1 * 4; | |
| 125 cl -> nocode = 1; | |
| 126 } | |
| 127 | |
| 128 void pseudo_zmb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 129 { | |
| 130 int rval, v1; | |
| 131 | |
| 132 rval = eval_expr(as, cl, optr, &v1); | |
| 133 if (rval < 0) | |
| 134 { | |
| 135 errorp1(ERR_FORWARD); | |
| 136 return; | |
| 137 } | |
| 138 if (v1 < 0) | |
| 139 { | |
| 140 errorp1(ERR_BADOPER); | |
| 141 return; | |
| 142 } | |
| 143 while (v1--) | |
| 144 emit(0); | |
| 145 } | |
| 146 | |
| 147 void pseudo_zmd(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 148 { | |
| 149 int rval, v1; | |
| 150 | |
| 151 rval = eval_expr(as, cl, optr, &v1); | |
| 152 if (rval < 0) | |
| 153 { | |
| 154 errorp1(ERR_FORWARD); | |
| 155 return; | |
| 156 } | |
| 157 if (v1 < 0) | |
| 158 { | |
| 159 errorp1(ERR_BADOPER); | |
| 160 return; | |
| 161 } | |
| 162 while (v1--) | |
| 163 { | |
| 164 emit(0); | |
| 165 emit(0); | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 void pseudo_zmq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 170 { | |
| 171 int rval, v1; | |
| 172 | |
| 173 rval = eval_expr(as, cl, optr, &v1); | |
| 174 if (rval < 0) | |
| 175 { | |
| 176 errorp1(ERR_FORWARD); | |
| 177 return; | |
| 178 } | |
| 179 if (v1 < 0) | |
| 180 { | |
| 181 errorp1(ERR_BADOPER); | |
| 182 return; | |
| 183 } | |
| 184 while (v1--) | |
| 185 { | |
| 186 emit(0); | |
| 187 emit(0); | |
| 188 emit(0); | |
| 189 emit(0); | |
| 190 } | |
| 191 } | |
| 192 | |
| 193 void pseudo_end(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 194 { | |
| 195 int rval, v1; | |
| 196 | |
| 197 while (**optr && isspace(**optr)) | |
| 198 ; | |
| 199 if (**optr && **optr != '*' && **optr != ';') | |
| 200 { | |
| 201 rval = eval_expr(as, cl, optr, &v1); | |
| 202 if (rval < 0) | |
| 203 { | |
| 204 errorp1(ERR_FORWARD); | |
| 205 return; | |
| 206 } | |
| 207 } | |
| 208 else | |
| 209 { | |
| 210 v1 = 0; | |
| 211 } | |
| 212 if (as -> passnum == 2) | |
| 213 as -> execaddr = v1; | |
| 214 } | |
| 215 | |
| 216 void pseudo_align(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 217 { | |
| 218 int rval, v1; | |
| 219 int cn; | |
| 220 | |
| 221 rval = eval_expr(as, cl, optr, &v1); | |
| 222 if (rval < 0) | |
| 223 { | |
| 224 errorp1(ERR_FORWARD); | |
| 225 return; | |
| 226 } | |
| 227 cn = cl -> addr % v1; | |
| 228 if (cn) | |
| 229 cn = v1 - cn; | |
| 230 | |
| 231 while (cn) | |
| 232 { | |
| 233 emit(0); | |
| 234 cn--; | |
| 235 } | |
| 236 } | |
| 237 | |
| 238 void pseudo_equ(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 239 { | |
| 240 int rval, v1; | |
| 241 | |
| 242 if (cl -> hassym == 0) | |
| 243 { | |
| 244 errorp1(ERR_NOSYM); | |
| 245 return; | |
| 246 } | |
| 247 rval = eval_expr(as, cl, optr, &v1); | |
| 248 // eval_expr returns -1 if there was a forward ref | |
| 249 // or -2 if the expr was invalid | |
| 250 if (rval == -2) | |
| 251 { | |
| 252 // carp | |
| 253 errorp1(ERR_FORWARD); | |
| 254 } | |
| 255 if (rval < 0) | |
| 256 { | |
| 257 // remove symbol ref | |
| 258 cl -> hassym = 0; | |
| 259 // mark as a "comment" so it isn't processed next time | |
| 260 cl -> opcode = -1; | |
| 261 return; | |
| 262 } | |
| 263 cl -> code_symloc = v1; | |
| 264 cl -> isequ = 1; | |
| 265 cl -> symaddr = v1 & 0xFFFF; | |
| 266 } | |
| 267 | |
| 268 void pseudo_set(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 269 { | |
| 270 int rval, v1; | |
| 271 | |
| 272 if (cl -> hassym == 0) | |
| 273 { | |
| 274 errorp1(ERR_NOSYM); | |
| 275 return; | |
| 276 } | |
| 277 rval = eval_expr(as, cl, optr, &v1); | |
| 278 // eval_expr returns -1 if there was a forward ref | |
| 279 // or -2 if the expr was invalid | |
| 280 if (rval == -2) | |
| 281 { | |
| 282 // carp | |
| 283 errorp1(ERR_FORWARD); | |
| 284 } | |
| 285 if (rval < 0) | |
| 286 { | |
| 287 // remove symbol ref | |
| 288 cl -> hassym = 0; | |
| 289 // mark as a "comment" so it isn't processed next time | |
| 290 cl -> opcode = -1; | |
| 291 return; | |
| 292 } | |
| 293 cl -> code_symloc = v1; | |
| 294 cl -> isset = 1; | |
| 295 cl -> isequ = 1; | |
| 296 cl -> symaddr = v1 & 0xFFFF; | |
| 297 } | |
| 298 | |
| 299 void pseudo_setdp(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 300 { | |
| 301 int rval, v1; | |
| 302 | |
| 303 if (cl -> hassym) | |
| 304 { | |
| 305 register_error(as, cl, ERR_SYM); | |
| 306 cl -> hassym = 0; | |
| 307 return; | |
| 308 } | |
| 309 else | |
| 310 { | |
| 311 rval = eval_expr(as, cl, optr, &v1); | |
| 312 if (rval == -1) | |
| 313 { | |
| 314 errorp1(ERR_FORWARD); | |
| 315 } | |
| 316 if (rval < 0) | |
| 317 { | |
| 318 cl -> opcode = -1; | |
| 319 return; | |
| 320 } | |
| 321 } | |
| 322 // setdp needs to resolve properly on pass 2 | |
| 323 if (v1 > 0xff || v1 < 0) | |
| 324 { | |
| 325 errorp1(ERR_OVERFLOW); | |
| 326 } | |
| 327 as -> dpval = v1 & 0xff; | |
| 328 cl -> dpval = v1 & 0xff; | |
| 329 cl -> issetdp = 1; | |
| 330 cl -> numcodebytes = 0; | |
| 331 //printf("%s\n", "SETDP2"); | |
| 332 } | |
| 333 | |
| 334 void pseudo_fcc(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 335 { | |
| 336 int cn = 0; | |
| 337 int delim = 0; | |
| 338 | |
| 339 delim = *(*optr)++; | |
| 340 if (!delim) | |
| 341 { | |
| 342 errorp1(ERR_BADOPER); | |
| 343 } | |
| 344 else | |
| 345 { | |
| 346 while (**optr && **optr != delim) | |
| 347 { | |
| 348 emit(**optr); | |
| 349 (*optr)++; | |
| 350 cn += 1; | |
| 351 } | |
| 352 } | |
| 353 cl -> len = cn; | |
| 354 } | |
| 355 | |
| 356 void pseudo_fcs(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 357 { | |
| 358 int cn = 0; | |
| 359 int delim = 0; | |
| 360 | |
| 361 delim = *(*optr)++; | |
| 362 if (!delim) | |
| 363 { | |
| 364 errorp1(ERR_BADOPER); | |
| 365 } | |
| 366 else | |
| 367 { | |
| 368 while (**optr && **optr != delim) | |
| 369 { | |
| 370 if (!*((*optr) + 1) || *((*optr) + 1) == delim) | |
| 371 emit((**optr) | 0x80); | |
| 372 else | |
| 373 emit(**optr); | |
| 374 (*optr)++; | |
| 375 cn += 1; | |
| 376 } | |
| 377 } | |
| 378 cl -> len = cn; | |
| 379 } | |
| 380 | |
| 381 void pseudo_fcn(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 382 { | |
| 383 int cn = 0; | |
| 384 int delim = 0; | |
| 385 | |
| 386 delim = *(*optr)++; | |
| 387 if (!delim) | |
| 388 { | |
| 389 errorp1(ERR_BADOPER); | |
| 390 } | |
| 391 else | |
| 392 { | |
| 393 while (**optr && **optr != delim) | |
| 394 { | |
| 395 emit(**optr); | |
| 396 (*optr)++; | |
| 397 cn += 1; | |
| 398 } | |
| 399 } | |
| 400 emit(0); | |
| 401 cl -> len = cn + 1; | |
| 402 } | |
| 403 | |
| 404 void pseudo_fcb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 405 { | |
| 406 int rval, v1; | |
| 407 | |
| 408 fcb_again: | |
| 409 rval = eval_expr(as, cl, optr, &v1); | |
| 410 if (v1 < -127 || v1 > 0xff) | |
| 411 errorp2(ERR_OVERFLOW); | |
| 412 emit(v1 & 0xff); | |
| 413 if (**optr == ',') | |
| 414 { | |
| 415 (*optr)++; | |
| 416 goto fcb_again; | |
| 417 } | |
| 418 } | |
| 419 | |
| 420 void pseudo_fdb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 421 { | |
| 422 int rval, v1; | |
| 423 | |
| 424 fdb_again: | |
| 425 rval = eval_expr(as, cl, optr, &v1); | |
| 426 emit((v1 >> 8) & 0xff); | |
| 427 emit(v1 & 0xff); | |
| 428 if (**optr == ',') | |
| 429 { | |
| 430 (*optr)++; | |
| 431 goto fdb_again; | |
| 432 } | |
| 433 } | |
| 434 | |
| 435 void pseudo_fqb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 436 { | |
| 437 int rval, v1; | |
| 438 | |
| 439 fqb_again: | |
| 440 rval = eval_expr(as, cl, optr, &v1); | |
| 441 emit((v1 >> 24) & 0xff); | |
| 442 emit((v1 >> 16) & 0xff); | |
| 443 emit((v1 >> 8) & 0xff); | |
| 444 emit(v1 & 0xff); | |
| 445 if (**optr == ',') | |
| 446 { | |
| 447 (*optr)++; | |
| 448 goto fqb_again; | |
| 449 } | |
| 450 } | |
| 451 | |
| 452 // don't need to do anything if we are executing one of these | |
| 453 void pseudo_endc(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 454 { | |
| 455 return; | |
| 456 } | |
| 457 | |
| 458 // if "else" executes, we must be going into an "ignore" state | |
| 459 void pseudo_else(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 460 { | |
| 461 as -> skipcond = 1; | |
| 462 as -> skipcount = 1; | |
| 463 } | |
| 464 | |
| 465 void pseudo_ifne(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 466 { | |
| 467 int v1; | |
| 468 int rval; | |
| 469 // printf("ifne %s\n", *optr); | |
| 470 rval = eval_expr(as, cl, optr, &v1); | |
| 471 if (rval < 0) | |
| 472 { | |
| 473 errorp1(ERR_BADCOND); | |
| 474 } | |
| 475 else | |
| 476 { | |
| 477 // printf("Condition value: %d\n", v1); | |
| 478 if (!v1) | |
| 479 { | |
| 480 // printf("condition no match\n"); | |
| 481 as -> skipcond = 1; | |
| 482 as -> skipcount = 1; | |
| 483 } | |
| 484 } | |
| 485 } | |
| 486 void pseudo_ifeq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 487 { | |
| 488 int v1; | |
| 489 int rval; | |
| 490 | |
| 491 rval = eval_expr(as, cl, optr, &v1); | |
| 492 if (rval < 0) | |
| 493 { | |
| 494 errorp1(ERR_BADCOND); | |
| 495 } | |
| 496 else | |
| 497 { | |
| 498 if (v1) | |
| 499 { | |
| 500 as -> skipcond = 1; | |
| 501 as -> skipcount = 1; | |
| 502 } | |
| 503 } | |
| 504 } | |
| 505 void pseudo_iflt(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 506 { | |
| 507 int v1; | |
| 508 int rval; | |
| 509 | |
| 510 rval = eval_expr(as, cl, optr, &v1); | |
| 511 if (rval < 0) | |
| 512 { | |
| 513 errorp1(ERR_BADCOND); | |
| 514 } | |
| 515 else | |
| 516 { | |
| 517 if (v1 >= 0) | |
| 518 { | |
| 519 as -> skipcond = 1; | |
| 520 as -> skipcount = 1; | |
| 521 } | |
| 522 } | |
| 523 } | |
| 524 void pseudo_ifle(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 525 { | |
| 526 int v1; | |
| 527 int rval; | |
| 528 | |
| 529 rval = eval_expr(as, cl, optr, &v1); | |
| 530 if (rval < 0) | |
| 531 { | |
| 532 errorp1(ERR_BADCOND); | |
| 533 } | |
| 534 else | |
| 535 { | |
| 536 if (v1 > 0) | |
| 537 { | |
| 538 as -> skipcond = 1; | |
| 539 as -> skipcount = 1; | |
| 540 } | |
| 541 } | |
| 542 } | |
| 543 void pseudo_ifgt(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 544 { | |
| 545 int v1; | |
| 546 int rval; | |
| 547 | |
| 548 rval = eval_expr(as, cl, optr, &v1); | |
| 549 if (rval < 0) | |
| 550 { | |
| 551 errorp1(ERR_BADCOND); | |
| 552 } | |
| 553 else | |
| 554 { | |
| 555 if (v1 <= 0) | |
| 556 { | |
| 557 as -> skipcond = 1; | |
| 558 as -> skipcount = 1; | |
| 559 } | |
| 560 } | |
| 561 } | |
| 562 void pseudo_ifge(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 563 { | |
| 564 int v1; | |
| 565 int rval; | |
| 566 | |
| 567 rval = eval_expr(as, cl, optr, &v1); | |
| 568 if (rval < 0) | |
| 569 { | |
| 570 errorp1(ERR_BADCOND); | |
| 571 } | |
| 572 else | |
| 573 { | |
| 574 if (v1 < 0) | |
| 575 { | |
| 576 as -> skipcond = 1; | |
| 577 as -> skipcount = 1; | |
| 578 } | |
| 579 } | |
| 580 } | |
| 581 | |
| 582 void pseudo_error(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 583 { | |
| 584 cl -> user_error = strdup(*optr); | |
| 585 errorp1(ERR_USER); | |
| 586 } |