Mercurial > hg-old > index.cgi
annotate src/pseudo.c @ 49:21ae0fab469b
Added needed infra for useful listing of EQU and ORG type statements
| author | lost |
|---|---|
| date | Sun, 04 Jan 2009 07:37:19 +0000 |
| parents | 804d7465e0f9 |
| children | e672232caffe |
| rev | line source |
|---|---|
| 0 | 1 /* |
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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 © 2009 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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9 Foundation, either version 3 of the License, or (at your option) any later |
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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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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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15 more details. |
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16 |
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17 You should have received a copy of the GNU General Public License along with |
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18 this program. If not, see <http://www.gnu.org/licenses/>. |
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19 |
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20 |
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21 This file implements the various pseudo operations. |
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22 */ |
| 0 | 23 |
| 24 #include <stdlib.h> | |
| 25 #include "lwasm.h" | |
| 26 #include "instab.h" | |
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27 #include "expr.h" |
| 0 | 28 |
| 29 | |
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30 OPFUNC(pseudo_org) |
| 0 | 31 { |
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32 int rval; |
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33 lwasm_expr_stack_t *s; |
| 0 | 34 |
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35 if (l -> sym) |
| 0 | 36 { |
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37 register_error(as, l, 1, "No symbol allowed with ORG"); |
| 0 | 38 } |
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39 s = lwasm_evaluate_expr(as, l, *p, NULL); |
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40 if (!s) |
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41 { |
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42 register_error(as, l, 1, "Bad expression"); |
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43 return; |
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44 } |
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45 if (!lwasm_expr_is_constant(s)) |
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46 { |
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47 register_error(as, l, 1, "Illegal incomplete reference (pass 1)"); |
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48 return; |
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Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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49 } |
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Added needed infra for useful listing of EQU and ORG type statements
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50 rval = lwasm_expr_get_value(s) & 0xffff; |
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51 l -> codeaddr = rval; |
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52 l -> addrset = 1; |
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53 as -> addr = rval; |
| 0 | 54 } |
| 55 | |
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56 /* |
| 0 | 57 void pseudo_include(asmstate_t *as, sourceline_t *cl, char **optr) |
| 58 { | |
| 59 int v1; | |
| 60 | |
| 61 if (as -> passnum != 1) | |
| 62 return; | |
| 63 while (**optr && isspace(**optr)) | |
| 64 (*optr)++; | |
| 65 if (!**optr) | |
| 66 { | |
| 67 register_error(as, cl, ERR_BADFN); | |
| 68 return; | |
| 69 } | |
| 70 for (v1 = 0; *((*optr)+v1) && !isspace(*((*optr)+v1)); v1++) | |
| 71 ; | |
| 72 { | |
| 73 char *fn = malloc(v1 + 1); | |
| 74 strncpy(fn, *optr, v1); | |
| 75 fn[v1] = '\0'; | |
| 76 lwasm_read_file(as, fn); | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 | |
| 81 void pseudo_rmb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 82 { | |
| 83 int rval, v1; | |
| 84 | |
| 85 rval = eval_expr(as, cl, optr, &v1); | |
| 86 if (rval < 0) | |
| 87 { | |
| 88 errorp1(ERR_FORWARD); | |
| 89 return; | |
| 90 } | |
| 91 if (v1 < 0) | |
| 92 { | |
| 93 errorp1(ERR_BADOPER); | |
| 94 return; | |
| 95 } | |
| 96 cl -> len = v1; | |
| 97 cl -> nocode = 1; | |
| 98 } | |
| 99 | |
| 100 void pseudo_rmd(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 101 { | |
| 102 int rval, v1; | |
| 103 | |
| 104 rval = eval_expr(as, cl, optr, &v1); | |
| 105 if (rval < 0) | |
| 106 { | |
| 107 errorp1(ERR_FORWARD); | |
| 108 return; | |
| 109 } | |
| 110 if (v1 < 0) | |
| 111 { | |
| 112 errorp1(ERR_BADOPER); | |
| 113 return; | |
| 114 } | |
| 115 cl -> len = v1 * 2; | |
| 116 cl -> nocode = 1; | |
| 117 } | |
| 118 | |
| 119 void pseudo_rmq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 120 { | |
| 121 int rval, v1; | |
| 122 | |
| 123 rval = eval_expr(as, cl, optr, &v1); | |
| 124 if (rval < 0) | |
| 125 { | |
| 126 errorp1(ERR_FORWARD); | |
| 127 return; | |
| 128 } | |
| 129 if (v1 < 0) | |
| 130 { | |
| 131 errorp1(ERR_BADOPER); | |
| 132 return; | |
| 133 } | |
| 134 cl -> len = v1 * 4; | |
| 135 cl -> nocode = 1; | |
| 136 } | |
| 137 | |
| 138 void pseudo_zmb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 139 { | |
| 140 int rval, v1; | |
| 141 | |
| 142 rval = eval_expr(as, cl, optr, &v1); | |
| 143 if (rval < 0) | |
| 144 { | |
| 145 errorp1(ERR_FORWARD); | |
| 146 return; | |
| 147 } | |
| 148 if (v1 < 0) | |
| 149 { | |
| 150 errorp1(ERR_BADOPER); | |
| 151 return; | |
| 152 } | |
| 153 while (v1--) | |
| 154 emit(0); | |
| 155 } | |
| 156 | |
| 157 void pseudo_zmd(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 158 { | |
| 159 int rval, v1; | |
| 160 | |
| 161 rval = eval_expr(as, cl, optr, &v1); | |
| 162 if (rval < 0) | |
| 163 { | |
| 164 errorp1(ERR_FORWARD); | |
| 165 return; | |
| 166 } | |
| 167 if (v1 < 0) | |
| 168 { | |
| 169 errorp1(ERR_BADOPER); | |
| 170 return; | |
| 171 } | |
| 172 while (v1--) | |
| 173 { | |
| 174 emit(0); | |
| 175 emit(0); | |
| 176 } | |
| 177 } | |
| 178 | |
| 179 void pseudo_zmq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 180 { | |
| 181 int rval, v1; | |
| 182 | |
| 183 rval = eval_expr(as, cl, optr, &v1); | |
| 184 if (rval < 0) | |
| 185 { | |
| 186 errorp1(ERR_FORWARD); | |
| 187 return; | |
| 188 } | |
| 189 if (v1 < 0) | |
| 190 { | |
| 191 errorp1(ERR_BADOPER); | |
| 192 return; | |
| 193 } | |
| 194 while (v1--) | |
| 195 { | |
| 196 emit(0); | |
| 197 emit(0); | |
| 198 emit(0); | |
| 199 emit(0); | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 void pseudo_end(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 204 { | |
| 205 int rval, v1; | |
| 206 | |
| 207 while (**optr && isspace(**optr)) | |
| 208 ; | |
| 209 if (**optr && **optr != '*' && **optr != ';') | |
| 210 { | |
| 211 rval = eval_expr(as, cl, optr, &v1); | |
| 212 if (rval < 0) | |
| 213 { | |
| 214 errorp1(ERR_FORWARD); | |
| 215 return; | |
| 216 } | |
| 217 } | |
| 218 else | |
| 219 { | |
| 220 v1 = 0; | |
| 221 } | |
| 222 if (as -> passnum == 2) | |
| 223 as -> execaddr = v1; | |
| 224 } | |
| 225 | |
| 226 void pseudo_align(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 227 { | |
| 228 int rval, v1; | |
| 229 int cn; | |
| 230 | |
| 231 rval = eval_expr(as, cl, optr, &v1); | |
| 232 if (rval < 0) | |
| 233 { | |
| 234 errorp1(ERR_FORWARD); | |
| 235 return; | |
| 236 } | |
| 237 cn = cl -> addr % v1; | |
| 238 if (cn) | |
| 239 cn = v1 - cn; | |
| 240 | |
| 241 while (cn) | |
| 242 { | |
| 243 emit(0); | |
| 244 cn--; | |
| 245 } | |
| 246 } | |
| 247 | |
| 248 void pseudo_equ(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 249 { | |
| 250 int rval, v1; | |
| 251 | |
| 252 if (cl -> hassym == 0) | |
| 253 { | |
| 254 errorp1(ERR_NOSYM); | |
| 255 return; | |
| 256 } | |
| 257 rval = eval_expr(as, cl, optr, &v1); | |
| 258 // eval_expr returns -1 if there was a forward ref | |
| 259 // or -2 if the expr was invalid | |
| 260 if (rval == -2) | |
| 261 { | |
| 262 // carp | |
| 263 errorp1(ERR_FORWARD); | |
| 264 } | |
| 265 if (rval < 0) | |
| 266 { | |
| 267 // remove symbol ref | |
| 268 cl -> hassym = 0; | |
| 269 // mark as a "comment" so it isn't processed next time | |
| 270 cl -> opcode = -1; | |
| 271 return; | |
| 272 } | |
| 273 cl -> code_symloc = v1; | |
| 274 cl -> isequ = 1; | |
| 275 cl -> symaddr = v1 & 0xFFFF; | |
| 276 } | |
| 277 | |
| 278 void pseudo_set(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 279 { | |
| 280 int rval, v1; | |
| 281 | |
| 282 if (cl -> hassym == 0) | |
| 283 { | |
| 284 errorp1(ERR_NOSYM); | |
| 285 return; | |
| 286 } | |
| 287 rval = eval_expr(as, cl, optr, &v1); | |
| 288 // eval_expr returns -1 if there was a forward ref | |
| 289 // or -2 if the expr was invalid | |
| 290 if (rval == -2) | |
| 291 { | |
| 292 // carp | |
| 293 errorp1(ERR_FORWARD); | |
| 294 } | |
| 295 if (rval < 0) | |
| 296 { | |
| 297 // remove symbol ref | |
| 298 cl -> hassym = 0; | |
| 299 // mark as a "comment" so it isn't processed next time | |
| 300 cl -> opcode = -1; | |
| 301 return; | |
| 302 } | |
| 303 cl -> code_symloc = v1; | |
| 304 cl -> isset = 1; | |
| 305 cl -> isequ = 1; | |
| 306 cl -> symaddr = v1 & 0xFFFF; | |
| 307 } | |
| 308 | |
| 309 void pseudo_setdp(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 310 { | |
| 311 int rval, v1; | |
| 312 | |
| 313 if (cl -> hassym) | |
| 314 { | |
| 315 register_error(as, cl, ERR_SYM); | |
| 316 cl -> hassym = 0; | |
| 317 return; | |
| 318 } | |
| 319 else | |
| 320 { | |
| 321 rval = eval_expr(as, cl, optr, &v1); | |
| 322 if (rval == -1) | |
| 323 { | |
| 324 errorp1(ERR_FORWARD); | |
| 325 } | |
| 326 if (rval < 0) | |
| 327 { | |
| 328 cl -> opcode = -1; | |
| 329 return; | |
| 330 } | |
| 331 } | |
| 332 // setdp needs to resolve properly on pass 2 | |
| 333 if (v1 > 0xff || v1 < 0) | |
| 334 { | |
| 335 errorp1(ERR_OVERFLOW); | |
| 336 } | |
| 337 as -> dpval = v1 & 0xff; | |
| 338 cl -> dpval = v1 & 0xff; | |
| 339 cl -> issetdp = 1; | |
| 340 cl -> numcodebytes = 0; | |
| 341 //printf("%s\n", "SETDP2"); | |
| 342 } | |
| 343 | |
| 344 void pseudo_fcc(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 345 { | |
| 346 int cn = 0; | |
| 347 int delim = 0; | |
| 348 | |
| 349 delim = *(*optr)++; | |
| 350 if (!delim) | |
| 351 { | |
| 352 errorp1(ERR_BADOPER); | |
| 353 } | |
| 354 else | |
| 355 { | |
| 356 while (**optr && **optr != delim) | |
| 357 { | |
| 358 emit(**optr); | |
| 359 (*optr)++; | |
| 360 cn += 1; | |
| 361 } | |
| 362 } | |
| 363 cl -> len = cn; | |
| 364 } | |
| 365 | |
| 366 void pseudo_fcs(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 367 { | |
| 368 int cn = 0; | |
| 369 int delim = 0; | |
| 370 | |
| 371 delim = *(*optr)++; | |
| 372 if (!delim) | |
| 373 { | |
| 374 errorp1(ERR_BADOPER); | |
| 375 } | |
| 376 else | |
| 377 { | |
| 378 while (**optr && **optr != delim) | |
| 379 { | |
| 380 if (!*((*optr) + 1) || *((*optr) + 1) == delim) | |
| 381 emit((**optr) | 0x80); | |
| 382 else | |
| 383 emit(**optr); | |
| 384 (*optr)++; | |
| 385 cn += 1; | |
| 386 } | |
| 387 } | |
| 388 cl -> len = cn; | |
| 389 } | |
| 390 | |
| 391 void pseudo_fcn(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 392 { | |
| 393 int cn = 0; | |
| 394 int delim = 0; | |
| 395 | |
| 396 delim = *(*optr)++; | |
| 397 if (!delim) | |
| 398 { | |
| 399 errorp1(ERR_BADOPER); | |
| 400 } | |
| 401 else | |
| 402 { | |
| 403 while (**optr && **optr != delim) | |
| 404 { | |
| 405 emit(**optr); | |
| 406 (*optr)++; | |
| 407 cn += 1; | |
| 408 } | |
| 409 } | |
| 410 emit(0); | |
| 411 cl -> len = cn + 1; | |
| 412 } | |
| 413 | |
| 414 void pseudo_fcb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 415 { | |
| 416 int rval, v1; | |
| 417 | |
| 418 fcb_again: | |
| 419 rval = eval_expr(as, cl, optr, &v1); | |
| 420 if (v1 < -127 || v1 > 0xff) | |
| 421 errorp2(ERR_OVERFLOW); | |
| 422 emit(v1 & 0xff); | |
| 423 if (**optr == ',') | |
| 424 { | |
| 425 (*optr)++; | |
| 426 goto fcb_again; | |
| 427 } | |
| 428 } | |
| 429 | |
| 430 void pseudo_fdb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 431 { | |
| 432 int rval, v1; | |
| 433 | |
| 434 fdb_again: | |
| 435 rval = eval_expr(as, cl, optr, &v1); | |
| 436 emit((v1 >> 8) & 0xff); | |
| 437 emit(v1 & 0xff); | |
| 438 if (**optr == ',') | |
| 439 { | |
| 440 (*optr)++; | |
| 441 goto fdb_again; | |
| 442 } | |
| 443 } | |
| 444 | |
| 445 void pseudo_fqb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 446 { | |
| 447 int rval, v1; | |
| 448 | |
| 449 fqb_again: | |
| 450 rval = eval_expr(as, cl, optr, &v1); | |
| 451 emit((v1 >> 24) & 0xff); | |
| 452 emit((v1 >> 16) & 0xff); | |
| 453 emit((v1 >> 8) & 0xff); | |
| 454 emit(v1 & 0xff); | |
| 455 if (**optr == ',') | |
| 456 { | |
| 457 (*optr)++; | |
| 458 goto fqb_again; | |
| 459 } | |
| 460 } | |
| 461 | |
| 462 // don't need to do anything if we are executing one of these | |
| 463 void pseudo_endc(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 464 { | |
| 465 return; | |
| 466 } | |
| 467 | |
| 468 // if "else" executes, we must be going into an "ignore" state | |
| 469 void pseudo_else(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 470 { | |
| 471 as -> skipcond = 1; | |
| 472 as -> skipcount = 1; | |
| 473 } | |
| 474 | |
| 475 void pseudo_ifne(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 476 { | |
| 477 int v1; | |
| 478 int rval; | |
| 479 // printf("ifne %s\n", *optr); | |
| 480 rval = eval_expr(as, cl, optr, &v1); | |
| 481 if (rval < 0) | |
| 482 { | |
| 483 errorp1(ERR_BADCOND); | |
| 484 } | |
| 485 else | |
| 486 { | |
| 487 // printf("Condition value: %d\n", v1); | |
| 488 if (!v1) | |
| 489 { | |
| 490 // printf("condition no match\n"); | |
| 491 as -> skipcond = 1; | |
| 492 as -> skipcount = 1; | |
| 493 } | |
| 494 } | |
| 495 } | |
| 496 void pseudo_ifeq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 497 { | |
| 498 int v1; | |
| 499 int rval; | |
| 500 | |
| 501 rval = eval_expr(as, cl, optr, &v1); | |
| 502 if (rval < 0) | |
| 503 { | |
| 504 errorp1(ERR_BADCOND); | |
| 505 } | |
| 506 else | |
| 507 { | |
| 508 if (v1) | |
| 509 { | |
| 510 as -> skipcond = 1; | |
| 511 as -> skipcount = 1; | |
| 512 } | |
| 513 } | |
| 514 } | |
| 515 void pseudo_iflt(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 516 { | |
| 517 int v1; | |
| 518 int rval; | |
| 519 | |
| 520 rval = eval_expr(as, cl, optr, &v1); | |
| 521 if (rval < 0) | |
| 522 { | |
| 523 errorp1(ERR_BADCOND); | |
| 524 } | |
| 525 else | |
| 526 { | |
| 527 if (v1 >= 0) | |
| 528 { | |
| 529 as -> skipcond = 1; | |
| 530 as -> skipcount = 1; | |
| 531 } | |
| 532 } | |
| 533 } | |
| 534 void pseudo_ifle(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 535 { | |
| 536 int v1; | |
| 537 int rval; | |
| 538 | |
| 539 rval = eval_expr(as, cl, optr, &v1); | |
| 540 if (rval < 0) | |
| 541 { | |
| 542 errorp1(ERR_BADCOND); | |
| 543 } | |
| 544 else | |
| 545 { | |
| 546 if (v1 > 0) | |
| 547 { | |
| 548 as -> skipcond = 1; | |
| 549 as -> skipcount = 1; | |
| 550 } | |
| 551 } | |
| 552 } | |
| 553 void pseudo_ifgt(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 554 { | |
| 555 int v1; | |
| 556 int rval; | |
| 557 | |
| 558 rval = eval_expr(as, cl, optr, &v1); | |
| 559 if (rval < 0) | |
| 560 { | |
| 561 errorp1(ERR_BADCOND); | |
| 562 } | |
| 563 else | |
| 564 { | |
| 565 if (v1 <= 0) | |
| 566 { | |
| 567 as -> skipcond = 1; | |
| 568 as -> skipcount = 1; | |
| 569 } | |
| 570 } | |
| 571 } | |
| 572 void pseudo_ifge(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 573 { | |
| 574 int v1; | |
| 575 int rval; | |
| 576 | |
| 577 rval = eval_expr(as, cl, optr, &v1); | |
| 578 if (rval < 0) | |
| 579 { | |
| 580 errorp1(ERR_BADCOND); | |
| 581 } | |
| 582 else | |
| 583 { | |
| 584 if (v1 < 0) | |
| 585 { | |
| 586 as -> skipcond = 1; | |
| 587 as -> skipcount = 1; | |
| 588 } | |
| 589 } | |
| 590 } | |
| 591 | |
| 592 void pseudo_error(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 593 { | |
| 594 cl -> user_error = strdup(*optr); | |
| 595 errorp1(ERR_USER); | |
| 596 } | |
|
47
804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
lost
parents:
4
diff
changeset
|
597 */ |