Mercurial > hg-old > index.cgi
annotate src/pseudo.c @ 47:804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
| author | lost |
|---|---|
| date | Sun, 04 Jan 2009 07:25:03 +0000 |
| parents | 34568fab6058 |
| children | 21ae0fab469b |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 pseudo.c |
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47
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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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34568fab6058
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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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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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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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34568fab6058
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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34568fab6058
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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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34568fab6058
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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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47
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37 register_error(as, l, 1, "No symbol allowed with ORG"); |
| 0 | 38 } |
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Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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39 s = lwasm_evaluate_expr(as, l, *p, NULL); |
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804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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40 if (!s) |
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804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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41 { |
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42 register_error(as, l, 1, "Bad expression"); |
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804d7465e0f9
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43 return; |
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44 } |
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804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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45 if (!lwasm_expr_is_constant(s)) |
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804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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46 { |
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47 register_error(as, l, 1, "Illegal incomplete reference (pass 1)"); |
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804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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48 return; |
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804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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49 } |
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804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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50 rval = lwasm_expr_get_value(s); |
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804d7465e0f9
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51 l -> codeaddr = rval; |
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804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
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52 as -> addr = rval; |
| 0 | 53 } |
| 54 | |
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804d7465e0f9
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55 /* |
| 0 | 56 void pseudo_include(asmstate_t *as, sourceline_t *cl, char **optr) |
| 57 { | |
| 58 int v1; | |
| 59 | |
| 60 if (as -> passnum != 1) | |
| 61 return; | |
| 62 while (**optr && isspace(**optr)) | |
| 63 (*optr)++; | |
| 64 if (!**optr) | |
| 65 { | |
| 66 register_error(as, cl, ERR_BADFN); | |
| 67 return; | |
| 68 } | |
| 69 for (v1 = 0; *((*optr)+v1) && !isspace(*((*optr)+v1)); v1++) | |
| 70 ; | |
| 71 { | |
| 72 char *fn = malloc(v1 + 1); | |
| 73 strncpy(fn, *optr, v1); | |
| 74 fn[v1] = '\0'; | |
| 75 lwasm_read_file(as, fn); | |
| 76 } | |
| 77 } | |
| 78 | |
| 79 | |
| 80 void pseudo_rmb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 81 { | |
| 82 int rval, v1; | |
| 83 | |
| 84 rval = eval_expr(as, cl, optr, &v1); | |
| 85 if (rval < 0) | |
| 86 { | |
| 87 errorp1(ERR_FORWARD); | |
| 88 return; | |
| 89 } | |
| 90 if (v1 < 0) | |
| 91 { | |
| 92 errorp1(ERR_BADOPER); | |
| 93 return; | |
| 94 } | |
| 95 cl -> len = v1; | |
| 96 cl -> nocode = 1; | |
| 97 } | |
| 98 | |
| 99 void pseudo_rmd(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 100 { | |
| 101 int rval, v1; | |
| 102 | |
| 103 rval = eval_expr(as, cl, optr, &v1); | |
| 104 if (rval < 0) | |
| 105 { | |
| 106 errorp1(ERR_FORWARD); | |
| 107 return; | |
| 108 } | |
| 109 if (v1 < 0) | |
| 110 { | |
| 111 errorp1(ERR_BADOPER); | |
| 112 return; | |
| 113 } | |
| 114 cl -> len = v1 * 2; | |
| 115 cl -> nocode = 1; | |
| 116 } | |
| 117 | |
| 118 void pseudo_rmq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 119 { | |
| 120 int rval, v1; | |
| 121 | |
| 122 rval = eval_expr(as, cl, optr, &v1); | |
| 123 if (rval < 0) | |
| 124 { | |
| 125 errorp1(ERR_FORWARD); | |
| 126 return; | |
| 127 } | |
| 128 if (v1 < 0) | |
| 129 { | |
| 130 errorp1(ERR_BADOPER); | |
| 131 return; | |
| 132 } | |
| 133 cl -> len = v1 * 4; | |
| 134 cl -> nocode = 1; | |
| 135 } | |
| 136 | |
| 137 void pseudo_zmb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 138 { | |
| 139 int rval, v1; | |
| 140 | |
| 141 rval = eval_expr(as, cl, optr, &v1); | |
| 142 if (rval < 0) | |
| 143 { | |
| 144 errorp1(ERR_FORWARD); | |
| 145 return; | |
| 146 } | |
| 147 if (v1 < 0) | |
| 148 { | |
| 149 errorp1(ERR_BADOPER); | |
| 150 return; | |
| 151 } | |
| 152 while (v1--) | |
| 153 emit(0); | |
| 154 } | |
| 155 | |
| 156 void pseudo_zmd(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 157 { | |
| 158 int rval, v1; | |
| 159 | |
| 160 rval = eval_expr(as, cl, optr, &v1); | |
| 161 if (rval < 0) | |
| 162 { | |
| 163 errorp1(ERR_FORWARD); | |
| 164 return; | |
| 165 } | |
| 166 if (v1 < 0) | |
| 167 { | |
| 168 errorp1(ERR_BADOPER); | |
| 169 return; | |
| 170 } | |
| 171 while (v1--) | |
| 172 { | |
| 173 emit(0); | |
| 174 emit(0); | |
| 175 } | |
| 176 } | |
| 177 | |
| 178 void pseudo_zmq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 179 { | |
| 180 int rval, v1; | |
| 181 | |
| 182 rval = eval_expr(as, cl, optr, &v1); | |
| 183 if (rval < 0) | |
| 184 { | |
| 185 errorp1(ERR_FORWARD); | |
| 186 return; | |
| 187 } | |
| 188 if (v1 < 0) | |
| 189 { | |
| 190 errorp1(ERR_BADOPER); | |
| 191 return; | |
| 192 } | |
| 193 while (v1--) | |
| 194 { | |
| 195 emit(0); | |
| 196 emit(0); | |
| 197 emit(0); | |
| 198 emit(0); | |
| 199 } | |
| 200 } | |
| 201 | |
| 202 void pseudo_end(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 203 { | |
| 204 int rval, v1; | |
| 205 | |
| 206 while (**optr && isspace(**optr)) | |
| 207 ; | |
| 208 if (**optr && **optr != '*' && **optr != ';') | |
| 209 { | |
| 210 rval = eval_expr(as, cl, optr, &v1); | |
| 211 if (rval < 0) | |
| 212 { | |
| 213 errorp1(ERR_FORWARD); | |
| 214 return; | |
| 215 } | |
| 216 } | |
| 217 else | |
| 218 { | |
| 219 v1 = 0; | |
| 220 } | |
| 221 if (as -> passnum == 2) | |
| 222 as -> execaddr = v1; | |
| 223 } | |
| 224 | |
| 225 void pseudo_align(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 226 { | |
| 227 int rval, v1; | |
| 228 int cn; | |
| 229 | |
| 230 rval = eval_expr(as, cl, optr, &v1); | |
| 231 if (rval < 0) | |
| 232 { | |
| 233 errorp1(ERR_FORWARD); | |
| 234 return; | |
| 235 } | |
| 236 cn = cl -> addr % v1; | |
| 237 if (cn) | |
| 238 cn = v1 - cn; | |
| 239 | |
| 240 while (cn) | |
| 241 { | |
| 242 emit(0); | |
| 243 cn--; | |
| 244 } | |
| 245 } | |
| 246 | |
| 247 void pseudo_equ(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 248 { | |
| 249 int rval, v1; | |
| 250 | |
| 251 if (cl -> hassym == 0) | |
| 252 { | |
| 253 errorp1(ERR_NOSYM); | |
| 254 return; | |
| 255 } | |
| 256 rval = eval_expr(as, cl, optr, &v1); | |
| 257 // eval_expr returns -1 if there was a forward ref | |
| 258 // or -2 if the expr was invalid | |
| 259 if (rval == -2) | |
| 260 { | |
| 261 // carp | |
| 262 errorp1(ERR_FORWARD); | |
| 263 } | |
| 264 if (rval < 0) | |
| 265 { | |
| 266 // remove symbol ref | |
| 267 cl -> hassym = 0; | |
| 268 // mark as a "comment" so it isn't processed next time | |
| 269 cl -> opcode = -1; | |
| 270 return; | |
| 271 } | |
| 272 cl -> code_symloc = v1; | |
| 273 cl -> isequ = 1; | |
| 274 cl -> symaddr = v1 & 0xFFFF; | |
| 275 } | |
| 276 | |
| 277 void pseudo_set(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 278 { | |
| 279 int rval, v1; | |
| 280 | |
| 281 if (cl -> hassym == 0) | |
| 282 { | |
| 283 errorp1(ERR_NOSYM); | |
| 284 return; | |
| 285 } | |
| 286 rval = eval_expr(as, cl, optr, &v1); | |
| 287 // eval_expr returns -1 if there was a forward ref | |
| 288 // or -2 if the expr was invalid | |
| 289 if (rval == -2) | |
| 290 { | |
| 291 // carp | |
| 292 errorp1(ERR_FORWARD); | |
| 293 } | |
| 294 if (rval < 0) | |
| 295 { | |
| 296 // remove symbol ref | |
| 297 cl -> hassym = 0; | |
| 298 // mark as a "comment" so it isn't processed next time | |
| 299 cl -> opcode = -1; | |
| 300 return; | |
| 301 } | |
| 302 cl -> code_symloc = v1; | |
| 303 cl -> isset = 1; | |
| 304 cl -> isequ = 1; | |
| 305 cl -> symaddr = v1 & 0xFFFF; | |
| 306 } | |
| 307 | |
| 308 void pseudo_setdp(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 309 { | |
| 310 int rval, v1; | |
| 311 | |
| 312 if (cl -> hassym) | |
| 313 { | |
| 314 register_error(as, cl, ERR_SYM); | |
| 315 cl -> hassym = 0; | |
| 316 return; | |
| 317 } | |
| 318 else | |
| 319 { | |
| 320 rval = eval_expr(as, cl, optr, &v1); | |
| 321 if (rval == -1) | |
| 322 { | |
| 323 errorp1(ERR_FORWARD); | |
| 324 } | |
| 325 if (rval < 0) | |
| 326 { | |
| 327 cl -> opcode = -1; | |
| 328 return; | |
| 329 } | |
| 330 } | |
| 331 // setdp needs to resolve properly on pass 2 | |
| 332 if (v1 > 0xff || v1 < 0) | |
| 333 { | |
| 334 errorp1(ERR_OVERFLOW); | |
| 335 } | |
| 336 as -> dpval = v1 & 0xff; | |
| 337 cl -> dpval = v1 & 0xff; | |
| 338 cl -> issetdp = 1; | |
| 339 cl -> numcodebytes = 0; | |
| 340 //printf("%s\n", "SETDP2"); | |
| 341 } | |
| 342 | |
| 343 void pseudo_fcc(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 344 { | |
| 345 int cn = 0; | |
| 346 int delim = 0; | |
| 347 | |
| 348 delim = *(*optr)++; | |
| 349 if (!delim) | |
| 350 { | |
| 351 errorp1(ERR_BADOPER); | |
| 352 } | |
| 353 else | |
| 354 { | |
| 355 while (**optr && **optr != delim) | |
| 356 { | |
| 357 emit(**optr); | |
| 358 (*optr)++; | |
| 359 cn += 1; | |
| 360 } | |
| 361 } | |
| 362 cl -> len = cn; | |
| 363 } | |
| 364 | |
| 365 void pseudo_fcs(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 366 { | |
| 367 int cn = 0; | |
| 368 int delim = 0; | |
| 369 | |
| 370 delim = *(*optr)++; | |
| 371 if (!delim) | |
| 372 { | |
| 373 errorp1(ERR_BADOPER); | |
| 374 } | |
| 375 else | |
| 376 { | |
| 377 while (**optr && **optr != delim) | |
| 378 { | |
| 379 if (!*((*optr) + 1) || *((*optr) + 1) == delim) | |
| 380 emit((**optr) | 0x80); | |
| 381 else | |
| 382 emit(**optr); | |
| 383 (*optr)++; | |
| 384 cn += 1; | |
| 385 } | |
| 386 } | |
| 387 cl -> len = cn; | |
| 388 } | |
| 389 | |
| 390 void pseudo_fcn(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 391 { | |
| 392 int cn = 0; | |
| 393 int delim = 0; | |
| 394 | |
| 395 delim = *(*optr)++; | |
| 396 if (!delim) | |
| 397 { | |
| 398 errorp1(ERR_BADOPER); | |
| 399 } | |
| 400 else | |
| 401 { | |
| 402 while (**optr && **optr != delim) | |
| 403 { | |
| 404 emit(**optr); | |
| 405 (*optr)++; | |
| 406 cn += 1; | |
| 407 } | |
| 408 } | |
| 409 emit(0); | |
| 410 cl -> len = cn + 1; | |
| 411 } | |
| 412 | |
| 413 void pseudo_fcb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 414 { | |
| 415 int rval, v1; | |
| 416 | |
| 417 fcb_again: | |
| 418 rval = eval_expr(as, cl, optr, &v1); | |
| 419 if (v1 < -127 || v1 > 0xff) | |
| 420 errorp2(ERR_OVERFLOW); | |
| 421 emit(v1 & 0xff); | |
| 422 if (**optr == ',') | |
| 423 { | |
| 424 (*optr)++; | |
| 425 goto fcb_again; | |
| 426 } | |
| 427 } | |
| 428 | |
| 429 void pseudo_fdb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 430 { | |
| 431 int rval, v1; | |
| 432 | |
| 433 fdb_again: | |
| 434 rval = eval_expr(as, cl, optr, &v1); | |
| 435 emit((v1 >> 8) & 0xff); | |
| 436 emit(v1 & 0xff); | |
| 437 if (**optr == ',') | |
| 438 { | |
| 439 (*optr)++; | |
| 440 goto fdb_again; | |
| 441 } | |
| 442 } | |
| 443 | |
| 444 void pseudo_fqb(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 445 { | |
| 446 int rval, v1; | |
| 447 | |
| 448 fqb_again: | |
| 449 rval = eval_expr(as, cl, optr, &v1); | |
| 450 emit((v1 >> 24) & 0xff); | |
| 451 emit((v1 >> 16) & 0xff); | |
| 452 emit((v1 >> 8) & 0xff); | |
| 453 emit(v1 & 0xff); | |
| 454 if (**optr == ',') | |
| 455 { | |
| 456 (*optr)++; | |
| 457 goto fqb_again; | |
| 458 } | |
| 459 } | |
| 460 | |
| 461 // don't need to do anything if we are executing one of these | |
| 462 void pseudo_endc(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 463 { | |
| 464 return; | |
| 465 } | |
| 466 | |
| 467 // if "else" executes, we must be going into an "ignore" state | |
| 468 void pseudo_else(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 469 { | |
| 470 as -> skipcond = 1; | |
| 471 as -> skipcount = 1; | |
| 472 } | |
| 473 | |
| 474 void pseudo_ifne(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 475 { | |
| 476 int v1; | |
| 477 int rval; | |
| 478 // printf("ifne %s\n", *optr); | |
| 479 rval = eval_expr(as, cl, optr, &v1); | |
| 480 if (rval < 0) | |
| 481 { | |
| 482 errorp1(ERR_BADCOND); | |
| 483 } | |
| 484 else | |
| 485 { | |
| 486 // printf("Condition value: %d\n", v1); | |
| 487 if (!v1) | |
| 488 { | |
| 489 // printf("condition no match\n"); | |
| 490 as -> skipcond = 1; | |
| 491 as -> skipcount = 1; | |
| 492 } | |
| 493 } | |
| 494 } | |
| 495 void pseudo_ifeq(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 496 { | |
| 497 int v1; | |
| 498 int rval; | |
| 499 | |
| 500 rval = eval_expr(as, cl, optr, &v1); | |
| 501 if (rval < 0) | |
| 502 { | |
| 503 errorp1(ERR_BADCOND); | |
| 504 } | |
| 505 else | |
| 506 { | |
| 507 if (v1) | |
| 508 { | |
| 509 as -> skipcond = 1; | |
| 510 as -> skipcount = 1; | |
| 511 } | |
| 512 } | |
| 513 } | |
| 514 void pseudo_iflt(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 515 { | |
| 516 int v1; | |
| 517 int rval; | |
| 518 | |
| 519 rval = eval_expr(as, cl, optr, &v1); | |
| 520 if (rval < 0) | |
| 521 { | |
| 522 errorp1(ERR_BADCOND); | |
| 523 } | |
| 524 else | |
| 525 { | |
| 526 if (v1 >= 0) | |
| 527 { | |
| 528 as -> skipcond = 1; | |
| 529 as -> skipcount = 1; | |
| 530 } | |
| 531 } | |
| 532 } | |
| 533 void pseudo_ifle(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 534 { | |
| 535 int v1; | |
| 536 int rval; | |
| 537 | |
| 538 rval = eval_expr(as, cl, optr, &v1); | |
| 539 if (rval < 0) | |
| 540 { | |
| 541 errorp1(ERR_BADCOND); | |
| 542 } | |
| 543 else | |
| 544 { | |
| 545 if (v1 > 0) | |
| 546 { | |
| 547 as -> skipcond = 1; | |
| 548 as -> skipcount = 1; | |
| 549 } | |
| 550 } | |
| 551 } | |
| 552 void pseudo_ifgt(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 553 { | |
| 554 int v1; | |
| 555 int rval; | |
| 556 | |
| 557 rval = eval_expr(as, cl, optr, &v1); | |
| 558 if (rval < 0) | |
| 559 { | |
| 560 errorp1(ERR_BADCOND); | |
| 561 } | |
| 562 else | |
| 563 { | |
| 564 if (v1 <= 0) | |
| 565 { | |
| 566 as -> skipcond = 1; | |
| 567 as -> skipcount = 1; | |
| 568 } | |
| 569 } | |
| 570 } | |
| 571 void pseudo_ifge(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 572 { | |
| 573 int v1; | |
| 574 int rval; | |
| 575 | |
| 576 rval = eval_expr(as, cl, optr, &v1); | |
| 577 if (rval < 0) | |
| 578 { | |
| 579 errorp1(ERR_BADCOND); | |
| 580 } | |
| 581 else | |
| 582 { | |
| 583 if (v1 < 0) | |
| 584 { | |
| 585 as -> skipcond = 1; | |
| 586 as -> skipcount = 1; | |
| 587 } | |
| 588 } | |
| 589 } | |
| 590 | |
| 591 void pseudo_error(asmstate_t *as, sourceline_t *cl, char **optr) | |
| 592 { | |
| 593 cl -> user_error = strdup(*optr); | |
| 594 errorp1(ERR_USER); | |
| 595 } | |
|
47
804d7465e0f9
Implemented ORG and fixed problems with constants using $, &, or @ to specify base
lost
parents:
4
diff
changeset
|
596 */ |