Alexandre Lision | d204ea5 | 2013-10-15 10:16:25 -0400 | [diff] [blame] | 1 | ; |
| 2 | ; Copyright 1992 by Jutta Degener and Carsten Bormann, Technische |
| 3 | ; Universitaet Berlin. See the accompanying file "COPYRIGHT" for |
| 4 | ; details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE. |
| 5 | ; |
| 6 | ; |
| 7 | ; Lines starting with ' (in the first col) are echoed. |
| 8 | ; Lines starting with " (in the first col) are echoed to stderr. |
| 9 | ; Lines starting with ; or empty lines are ignored. |
| 10 | ; |
| 11 | ; The part after (including) a trailing '=' is what you expect; |
| 12 | ; there will be output if the result is different. |
| 13 | ; |
| 14 | ; - and + by itself mean MIN_WORD and MAX_WORD, respectively; |
| 15 | ; -- and ++ mean MIN_LONGWORD and MAX_LONGWORD. |
| 16 | ; |
| 17 | |
| 18 | 'test the basic arithmetic operations used for the rpe-ltd filtering. |
| 19 | ' |
| 20 | 'add ================ |
| 21 | ' basic |
| 22 | |
| 23 | add 0 0 = 0 |
| 24 | add 7 4 = 11 |
| 25 | add 4 6 = 10 |
| 26 | add 1 1 = 2 |
| 27 | |
| 28 | ' negative operands |
| 29 | |
| 30 | add -7 4 = -3 |
| 31 | add 4 -6 = -2 |
| 32 | add -1 -3 = -4 |
| 33 | add 7 -4 = 3 |
| 34 | add -4 6 = 2 |
| 35 | |
| 36 | ' positive overflow |
| 37 | ; (max-word = 32767) |
| 38 | add + 1 = + |
| 39 | add + + = + |
| 40 | add -1 + = 32766 |
| 41 | add 32766 2 = + |
| 42 | add 1 32766 = + |
| 43 | |
| 44 | ' underflow |
| 45 | ; (min-word = 32768) |
| 46 | |
| 47 | add - -1 = - |
| 48 | add - - = - |
| 49 | add 1 - = -32767 |
| 50 | add -32767 -2 = - |
| 51 | add -1 -32766 = -32767 |
| 52 | add -32767 -1 = - |
| 53 | add - + = -1 |
| 54 | add + - = -1 |
| 55 | add 0 - = - |
| 56 | add 0 + = + |
| 57 | ' |
| 58 | |
| 59 | 'L_add ================ |
| 60 | ' basic |
| 61 | |
| 62 | L_add 0 0 = 0 |
| 63 | L_add 7 4 = 11 |
| 64 | L_add 4 6 = 10 |
| 65 | L_add 1 1 = 2 |
| 66 | |
| 67 | ' negative operands |
| 68 | |
| 69 | L_add -7 4 = -3 |
| 70 | L_add 4 -6 = -2 |
| 71 | L_add -1 -3 = -4 |
| 72 | L_add 7 -4 = 3 |
| 73 | L_add -4 6 = 2 |
| 74 | L_add 0 -1 = -1 |
| 75 | |
| 76 | ' positive overflow |
| 77 | ; (max-longword = 2147483647) |
| 78 | L_add ++ 1 = ++ |
| 79 | L_add ++ ++ = ++ |
| 80 | L_add -1 ++ = 2147483646 |
| 81 | L_add 2147483646 2 = ++ |
| 82 | L_add 1 2147483645 = 2147483646 |
| 83 | |
| 84 | ' underflow |
| 85 | ; (min-longword = -2147483648) |
| 86 | |
| 87 | L_add -- -1 = -- |
| 88 | L_add -- -- = -- |
| 89 | L_add 1 -- = -2147483647 |
| 90 | L_add -2147483647 -2 = -- |
| 91 | L_add -1 -2147483646 = -2147483647 |
| 92 | L_add -2147483647 -1 = -- |
| 93 | L_add -- ++ = -1 |
| 94 | L_add ++ -- = -1 |
| 95 | L_add 0 -- = -- |
| 96 | L_add 0 ++ = ++ |
| 97 | ' |
| 98 | |
| 99 | 'sub ================ |
| 100 | ' basic |
| 101 | |
| 102 | sub 0 0 = 0 |
| 103 | sub 7 4 = 3 |
| 104 | sub 4 6 = -2 |
| 105 | sub 1 0 = 1 |
| 106 | |
| 107 | ' negative operands |
| 108 | |
| 109 | sub -7 4 = -11 |
| 110 | sub 4 -6 = 10 |
| 111 | sub -1 -3 = 2 |
| 112 | sub 7 -4 = 11 |
| 113 | sub -4 6 = -10 |
| 114 | |
| 115 | ' positive overflow |
| 116 | ; (max-word = 32767) |
| 117 | sub 1 - = + |
| 118 | sub + + = 0 |
| 119 | sub + 0 = + |
| 120 | sub + -1 = + |
| 121 | sub + 1 = 32766 |
| 122 | sub 1 + = -32766 |
| 123 | sub 0 + = -32767 |
| 124 | |
| 125 | ' underflow |
| 126 | ; (min-word = 32768) |
| 127 | |
| 128 | sub - -1 = -32767 |
| 129 | sub - 1 = - |
| 130 | sub - - = 0 |
| 131 | sub - + = - |
| 132 | sub + - = + |
| 133 | sub 1 - = + |
| 134 | sub -1 - = + |
| 135 | sub -32767 2 = - |
| 136 | sub 0 - = + |
| 137 | ' |
| 138 | |
| 139 | 'L_sub ================ |
| 140 | ' basic |
| 141 | |
| 142 | L_sub 0 0 = 0 |
| 143 | L_sub 7 4 = 3 |
| 144 | L_sub 4 6 = -2 |
| 145 | L_sub 1 0 = 1 |
| 146 | |
| 147 | ' negative operands |
| 148 | |
| 149 | L_sub -7 4 = -11 |
| 150 | L_sub 4 -6 = 10 |
| 151 | L_sub -1 -3 = 2 |
| 152 | L_sub 7 -4 = 11 |
| 153 | L_sub -4 6 = -10 |
| 154 | |
| 155 | ' positive overflow |
| 156 | L_sub 1 -- = ++ |
| 157 | L_sub ++ ++ = 0 |
| 158 | L_sub ++ 0 = ++ |
| 159 | L_sub ++ -1 = ++ |
| 160 | L_sub ++ 1 = 2147483646 |
| 161 | L_sub 1 ++ = -2147483646 |
| 162 | L_sub 0 ++ = -2147483647 |
| 163 | |
| 164 | ' underflow |
| 165 | |
| 166 | L_sub -- -1 = -2147483647 |
| 167 | L_sub -- 1 = -- |
| 168 | L_sub -- -- = 0 |
| 169 | L_sub -- ++ = -- |
| 170 | L_sub + -- = ++ |
| 171 | L_sub 1 -- = ++ |
| 172 | L_sub -1 -- = ++ |
| 173 | L_sub -2147483647 2 = -- |
| 174 | L_sub 0 -- = ++ |
| 175 | |
| 176 | ' |
| 177 | 'abs ================ |
| 178 | ' basic |
| 179 | |
| 180 | abs 0 = 0 |
| 181 | abs 2 = 2 |
| 182 | abs -459 = 459 |
| 183 | |
| 184 | ' overflow |
| 185 | |
| 186 | abs + = + |
| 187 | abs - = + |
| 188 | abs -32767 = + |
| 189 | abs 32766 = 32766 |
| 190 | abs -32766 = 32766 |
| 191 | |
| 192 | ' |
| 193 | 'mult ================ |
| 194 | ; actually, a * b >> 15 |
| 195 | |
| 196 | ' basic |
| 197 | mult 0 0 = 0 |
| 198 | mult 0x100 0x100 = 2 |
| 199 | mult 4711 0x4000 = 2355 |
| 200 | |
| 201 | ' negative operands |
| 202 | mult -1 0 = 0 |
| 203 | |
| 204 | mult -0x100 0x100 = -2 |
| 205 | mult 0x100 -0x100 = -2 |
| 206 | mult -0x100 -0x100 = 2 |
| 207 | |
| 208 | mult -4711 0x4000 = -2356 |
| 209 | mult 4711 -0x4000 = -2356 |
| 210 | mult -4711 -0x4000 = 2355 |
| 211 | |
| 212 | ' overflow |
| 213 | mult + + = 32766 |
| 214 | mult + 0x4000 = 0x3fff |
| 215 | mult 0x4000 + = 0x3fff |
| 216 | mult + 1 = 0 |
| 217 | mult + 2 = 1 |
| 218 | mult + 3 = 2 |
| 219 | |
| 220 | ' underflow |
| 221 | mult - - = + |
| 222 | mult - + = -32767 |
| 223 | mult + - = -32767 |
| 224 | mult - 1 = -1 |
| 225 | mult - 2 = -2 |
| 226 | mult - 3 = -3 |
| 227 | |
| 228 | ' |
| 229 | 'mult_r ================ |
| 230 | ; actually, (a * b + 16384) >> 15 |
| 231 | |
| 232 | ' basic |
| 233 | mult_r 0 0 = 0 |
| 234 | mult_r 0x100 0x100 = 2 |
| 235 | mult_r 4711 0x4000 = 2356 |
| 236 | |
| 237 | ' negative operands |
| 238 | mult_r -1 0 = 0 |
| 239 | |
| 240 | mult_r -0x100 0x100 = -2 |
| 241 | mult_r 0x100 -0x100 = -2 |
| 242 | mult_r -0x100 -0x100 = 2 |
| 243 | |
| 244 | mult_r -4711 0x4000 = -2355 |
| 245 | mult_r 4711 -0x4000 = -2355 |
| 246 | mult_r -4711 -0x4000 = 2356 |
| 247 | |
| 248 | ' overflow |
| 249 | mult_r + + = 32766 |
| 250 | mult_r + 32766 = 32765 |
| 251 | mult_r 32766 + = 32765 |
| 252 | mult_r + 0x4000 = 0x4000 |
| 253 | mult_r 0x4000 + = 0x4000 |
| 254 | mult_r + 0x4001 = 0x4000 |
| 255 | mult_r 0x4001 + = 0x4000 |
| 256 | mult_r + 2 = 2 |
| 257 | mult_r + 1 = 1 |
| 258 | mult_r 1 + = 1 |
| 259 | mult_r + 0 = 0 |
| 260 | mult_r 0 + = 0 |
| 261 | |
| 262 | ' underflow |
| 263 | mult_r - - = + |
| 264 | mult_r - + = -32767 |
| 265 | mult_r + - = -32767 |
| 266 | mult_r - 1 = -1 |
| 267 | mult_r - 2 = -2 |
| 268 | mult_r - 3 = -3 |
| 269 | |
| 270 | ' |
| 271 | 'L_mult ================ |
| 272 | ; actually, (a * b) << 1 |
| 273 | ; assert (a != MIN_WORD && b != MIN_WORD) |
| 274 | |
| 275 | ' basic |
| 276 | L_mult 0 0 = 0 |
| 277 | L_mult 2 3 = 12 |
| 278 | L_mult 4711 5 = 47110 |
| 279 | |
| 280 | ' negative operands |
| 281 | |
| 282 | L_mult -2 3 = -12 |
| 283 | L_mult 2 -3 = -12 |
| 284 | L_mult -2 -3 = 12 |
| 285 | L_mult -4711 5 = -47110 |
| 286 | L_mult 4711 -5 = -47110 |
| 287 | L_mult -4711 -5 = 47110 |
| 288 | |
| 289 | ' overflow |
| 290 | L_mult + + = 2147352578 |
| 291 | L_mult + -32767 = -2147352578 |
| 292 | L_mult -32767 + = -2147352578 |
| 293 | L_mult + 2 = 131068 |
| 294 | L_mult + 1 = 65534 |
| 295 | L_mult 1 + = 65534 |
| 296 | L_mult + 0 = 0 |
| 297 | L_mult 0 + = 0 |
| 298 | |
| 299 | ' |
| 300 | 'div ================ |
| 301 | ; actually, (32767 * a) / b |
| 302 | ; assert (a > 0 && b >= a) |
| 303 | |
| 304 | ' basic |
| 305 | div 1 1 = + |
| 306 | div 4711 4711 = + |
| 307 | div 5 10 = 0x4000 |
| 308 | div 5 20 = 0x2000 |
| 309 | div 5 40 = 0x1000 |
| 310 | |
| 311 | ' overflow |
| 312 | div + + = + |
| 313 | div 0x4000 + = 0x4000 |
| 314 | div 1 + = 1 |
| 315 | div 1 2 = 0x4000 |
| 316 | ' |
| 317 | 'norm ================ |
| 318 | |
| 319 | ' positive |
| 320 | norm 1 = 30 |
| 321 | norm 2 = 29 |
| 322 | norm 3 = 29 |
| 323 | norm 4 = 28 |
| 324 | norm 5 = 28 |
| 325 | ; etc, etc... |
| 326 | norm 0x08000000 = 3 |
| 327 | norm 0x10000000 = 2 |
| 328 | norm 0x20000000 = 1 |
| 329 | norm 0x20000001 = 1 |
| 330 | norm 0x3fffffff = 1 |
| 331 | norm 0x40000000 = 0 |
| 332 | norm 0x40000001 = 0 |
| 333 | norm 0x4ffffffe = 0 |
| 334 | norm ++ = 0 |
| 335 | |
| 336 | ' negative |
| 337 | norm -1 = 31 |
| 338 | norm -2 = 30 |
| 339 | norm -3 = 29 |
| 340 | norm -4 = 29 |
| 341 | norm -5 = 28 |
| 342 | ; etc, etc... |
| 343 | norm 0x4fffffff = 0 |
| 344 | norm -- = 0 |
| 345 | ' |
| 346 | '>> ================ |
| 347 | |
| 348 | ' basic |
| 349 | >> 1 1 = 0 |
| 350 | >> 4 2 = 1 |
| 351 | >> 0x1100 5 = 0x88 |
| 352 | |
| 353 | ' negative operand |
| 354 | |
| 355 | >> 1 -1 = 2 |
| 356 | >> 1 -2 = 4 |
| 357 | >> 0x88 -5 = 0x1100 |
| 358 | |
| 359 | ' overflow |
| 360 | >> -1 4711 = -1 |
| 361 | >> 1 4711 = 0 |
| 362 | >> -4711 4711 = -1 |
| 363 | >> 4711 4711 = 0 |
| 364 | >> + 1 = 16383 |
| 365 | >> - 1 = -16384 |
| 366 | ' |
| 367 | 'L_>> ================ |
| 368 | |
| 369 | ' basic |
| 370 | L_>> 1 1 = 0 |
| 371 | L_>> 4 2 = 1 |
| 372 | L_>> 0x1100 5 = 0x88 |
| 373 | |
| 374 | ' negative operand |
| 375 | |
| 376 | L_>> 1 -1 = 2 |
| 377 | L_>> 1 -2 = 4 |
| 378 | L_>> 0x88 -5 = 0x1100 |
| 379 | |
| 380 | ' overflow |
| 381 | L_>> -1 4711 = -1 |
| 382 | L_>> 1 4711 = 0 |
| 383 | L_>> -4711 4711 = -1 |
| 384 | L_>> 4711 4711 = 0 |
| 385 | L_>> ++ 1 = 1073741823 |
| 386 | L_>> -- 1 = -1073741824 |
| 387 | |
| 388 | ' |
| 389 | '<< ================ |
| 390 | |
| 391 | ' basic |
| 392 | << 1 1 = 2 |
| 393 | << 4 2 = 16 |
| 394 | << 0x0088 5 = 0x1100 |
| 395 | |
| 396 | ' negative operand |
| 397 | |
| 398 | << 1 -1 = 0 |
| 399 | << 4 -2 = 1 |
| 400 | << 0x1100 -5 = 0x0088 |
| 401 | |
| 402 | ' overflow |
| 403 | << -1 4711 = 0 |
| 404 | << 1 4711 = 0 |
| 405 | << -4711 4711 = 0 |
| 406 | << 4711 4711 = 0 |
| 407 | << 4711 -4711 = 0 |
| 408 | << -4711 -4711 = -1 |
| 409 | << + 1 = 0xfffe |
| 410 | << -1 1 = 0xfffe |
| 411 | << - 1 = 0 |
| 412 | ' |
| 413 | 'L_<< ================ |
| 414 | |
| 415 | ' basic |
| 416 | L_<< 1 1 = 2 |
| 417 | L_<< 4 2 = 16 |
| 418 | L_<< 0x0088 5 = 0x1100 |
| 419 | |
| 420 | ' negative operand |
| 421 | |
| 422 | L_<< 1 -1 = 0 |
| 423 | L_<< 4 -2 = 1 |
| 424 | L_<< 0x1100 -5 = 0x0088 |
| 425 | |
| 426 | ' overflow |
| 427 | L_<< -1 4711 = 0 |
| 428 | L_<< 1 4711 = 0 |
| 429 | L_<< -4711 4711 = 0 |
| 430 | L_<< 4711 4711 = 0 |
| 431 | L_<< 4711 -4711 = 0 |
| 432 | L_<< -4711 -4711 = -1 |
| 433 | L_<< ++ 1 = -2 |
| 434 | L_<< -1 1 = -2 |
| 435 | L_<< -- 1 = 0 |
| 436 | |
| 437 | 'macros |
| 438 | ' |
| 439 | 'add ================ |
| 440 | ' basic |
| 441 | |
| 442 | M_add 0 0 = 0 |
| 443 | M_add 7 4 = 11 |
| 444 | M_add 4 6 = 10 |
| 445 | M_add 1 1 = 2 |
| 446 | |
| 447 | ' negative operands |
| 448 | |
| 449 | M_add -7 4 = -3 |
| 450 | M_add 4 -6 = -2 |
| 451 | M_add -1 -3 = -4 |
| 452 | M_add 7 -4 = 3 |
| 453 | M_add -4 6 = 2 |
| 454 | |
| 455 | ' positive overflow |
| 456 | ; (max-word = 32767) |
| 457 | M_add + 1 = + |
| 458 | M_add + + = + |
| 459 | M_add -1 + = 32766 |
| 460 | M_add 32766 2 = + |
| 461 | M_add 1 32766 = + |
| 462 | |
| 463 | ' underflow |
| 464 | ; (min-word = 32768) |
| 465 | |
| 466 | M_add - -1 = - |
| 467 | M_add - - = - |
| 468 | M_add 1 - = -32767 |
| 469 | M_add -32767 -2 = - |
| 470 | M_add -1 -32766 = -32767 |
| 471 | M_add -32767 -1 = - |
| 472 | M_add - + = -1 |
| 473 | M_add + - = -1 |
| 474 | M_add 0 - = - |
| 475 | M_add 0 + = + |
| 476 | ' |
| 477 | |
| 478 | 'L_add ================ |
| 479 | ' basic |
| 480 | |
| 481 | M_L_add 0 0 = 0 |
| 482 | M_L_add 7 4 = 11 |
| 483 | M_L_add 4 6 = 10 |
| 484 | M_L_add 1 1 = 2 |
| 485 | |
| 486 | ' negative operands |
| 487 | |
| 488 | M_L_add -7 4 = -3 |
| 489 | M_L_add 4 -6 = -2 |
| 490 | M_L_add -1 -3 = -4 |
| 491 | M_L_add 7 -4 = 3 |
| 492 | M_L_add -4 6 = 2 |
| 493 | M_L_add 0 -1 = -1 |
| 494 | |
| 495 | ' positive overflow |
| 496 | ; (max-longword = 2147483647) |
| 497 | M_L_add ++ 1 = ++ |
| 498 | M_L_add ++ ++ = ++ |
| 499 | M_L_add -1 ++ = 2147483646 |
| 500 | M_L_add 2147483646 2 = ++ |
| 501 | M_L_add 1 2147483645 = 2147483646 |
| 502 | |
| 503 | ' underflow |
| 504 | ; (min-longword = -2147483648) |
| 505 | |
| 506 | M_L_add -- -1 = -- |
| 507 | M_L_add -- -- = -- |
| 508 | M_L_add 1 -- = -2147483647 |
| 509 | M_L_add -2147483647 -2 = -- |
| 510 | M_L_add -1 -2147483646 = -2147483647 |
| 511 | M_L_add -2147483647 -1 = -- |
| 512 | M_L_add -- ++ = -1 |
| 513 | M_L_add ++ -- = -1 |
| 514 | M_L_add 0 -- = -- |
| 515 | M_L_add 0 ++ = ++ |
| 516 | ' |
| 517 | |
| 518 | 'sub ================ |
| 519 | ' basic |
| 520 | |
| 521 | M_sub 0 0 = 0 |
| 522 | M_sub 7 4 = 3 |
| 523 | M_sub 4 6 = -2 |
| 524 | M_sub 1 0 = 1 |
| 525 | |
| 526 | ' negative operands |
| 527 | |
| 528 | M_sub -7 4 = -11 |
| 529 | M_sub 4 -6 = 10 |
| 530 | M_sub -1 -3 = 2 |
| 531 | M_sub 7 -4 = 11 |
| 532 | M_sub -4 6 = -10 |
| 533 | |
| 534 | ' positive overflow |
| 535 | ; (max-word = 32767) |
| 536 | M_sub 1 - = + |
| 537 | M_sub + + = 0 |
| 538 | M_sub + 0 = + |
| 539 | M_sub + -1 = + |
| 540 | M_sub + 1 = 32766 |
| 541 | M_sub 1 + = -32766 |
| 542 | M_sub 0 + = -32767 |
| 543 | |
| 544 | ' underflow |
| 545 | ; (min-word = 32768) |
| 546 | |
| 547 | M_sub - -1 = -32767 |
| 548 | M_sub - 1 = - |
| 549 | M_sub - - = 0 |
| 550 | M_sub - + = - |
| 551 | M_sub + - = + |
| 552 | M_sub 1 - = + |
| 553 | M_sub -1 - = + |
| 554 | M_sub -32767 2 = - |
| 555 | M_sub 0 - = + |
| 556 | ' |
| 557 | ' |
| 558 | 'abs ================ |
| 559 | ' basic |
| 560 | |
| 561 | M_abs 0 = 0 |
| 562 | M_abs 2 = 2 |
| 563 | M_abs -459 = 459 |
| 564 | |
| 565 | ' overflow |
| 566 | |
| 567 | M_abs + = + |
| 568 | M_abs - = + |
| 569 | M_abs -32767 = + |
| 570 | M_abs 32766 = 32766 |
| 571 | M_abs -32766 = 32766 |
| 572 | |
| 573 | ' |
| 574 | 'mult ================ |
| 575 | ; actually, a * b >> 15 |
| 576 | |
| 577 | ' basic |
| 578 | M_mult 0 0 = 0 |
| 579 | M_mult 0x100 0x100 = 2 |
| 580 | M_mult 4711 0x4000 = 2355 |
| 581 | |
| 582 | ' negative operands |
| 583 | M_mult -1 0 = 0 |
| 584 | |
| 585 | M_mult -0x100 0x100 = -2 |
| 586 | M_mult 0x100 -0x100 = -2 |
| 587 | M_mult -0x100 -0x100 = 2 |
| 588 | |
| 589 | M_mult -4711 0x4000 = -2356 |
| 590 | M_mult 4711 -0x4000 = -2356 |
| 591 | M_mult -4711 -0x4000 = 2355 |
| 592 | |
| 593 | ' overflow |
| 594 | M_mult + + = 32766 |
| 595 | M_mult + 0x4000 = 0x3fff |
| 596 | M_mult 0x4000 + = 0x3fff |
| 597 | M_mult + 1 = 0 |
| 598 | M_mult + 2 = 1 |
| 599 | M_mult + 3 = 2 |
| 600 | |
| 601 | ' underflow |
| 602 | ; M_mult - - = + assert !(a == b && b == MIN_WORD) |
| 603 | M_mult - -32767 = + |
| 604 | M_mult -32767 - = + |
| 605 | M_mult - + = -32767 |
| 606 | M_mult + - = -32767 |
| 607 | M_mult - 1 = -1 |
| 608 | M_mult - 2 = -2 |
| 609 | M_mult - 3 = -3 |
| 610 | |
| 611 | ' |
| 612 | 'mult_r ================ |
| 613 | ; actually, (a * b + 16384) >> 15 |
| 614 | |
| 615 | ' basic |
| 616 | M_mult_r 0 0 = 0 |
| 617 | M_mult_r 0x100 0x100 = 2 |
| 618 | M_mult_r 4711 0x4000 = 2356 |
| 619 | |
| 620 | ' negative operands |
| 621 | M_mult_r -1 0 = 0 |
| 622 | |
| 623 | M_mult_r -0x100 0x100 = -2 |
| 624 | M_mult_r 0x100 -0x100 = -2 |
| 625 | M_mult_r -0x100 -0x100 = 2 |
| 626 | |
| 627 | M_mult_r -4711 0x4000 = -2355 |
| 628 | M_mult_r 4711 -0x4000 = -2355 |
| 629 | M_mult_r -4711 -0x4000 = 2356 |
| 630 | |
| 631 | ' overflow |
| 632 | M_mult_r + + = 32766 |
| 633 | M_mult_r + 32766 = 32765 |
| 634 | M_mult_r 32766 + = 32765 |
| 635 | M_mult_r + 0x4000 = 0x4000 |
| 636 | M_mult_r 0x4000 + = 0x4000 |
| 637 | M_mult_r + 0x4001 = 0x4000 |
| 638 | M_mult_r 0x4001 + = 0x4000 |
| 639 | M_mult_r + 2 = 2 |
| 640 | M_mult_r + 1 = 1 |
| 641 | M_mult_r 1 + = 1 |
| 642 | M_mult_r + 0 = 0 |
| 643 | M_mult_r 0 + = 0 |
| 644 | |
| 645 | ' underflow |
| 646 | ; M_mult_r - - = + assert !(a == b && b == MIN_WORD) |
| 647 | M_mult_r - -32767 = + |
| 648 | M_mult_r -32767 - = + |
| 649 | M_mult_r - + = -32767 |
| 650 | M_mult_r + - = -32767 |
| 651 | M_mult_r - 1 = -1 |
| 652 | M_mult_r - 2 = -2 |
| 653 | M_mult_r - 3 = -3 |
| 654 | |
| 655 | ' |
| 656 | 'L_mult ================ |
| 657 | ; actually, (a * b) << 1 |
| 658 | ; assert (a != MIN_WORD && b != MIN_WORD) |
| 659 | |
| 660 | ' basic |
| 661 | M_L_mult 0 0 = 0 |
| 662 | M_L_mult 2 3 = 12 |
| 663 | M_L_mult 4711 5 = 47110 |
| 664 | |
| 665 | ' negative operands |
| 666 | |
| 667 | M_L_mult -2 3 = -12 |
| 668 | M_L_mult 2 -3 = -12 |
| 669 | M_L_mult -2 -3 = 12 |
| 670 | M_L_mult -4711 5 = -47110 |
| 671 | M_L_mult 4711 -5 = -47110 |
| 672 | M_L_mult -4711 -5 = 47110 |
| 673 | |
| 674 | ' overflow |
| 675 | M_L_mult + + = 2147352578 |
| 676 | M_L_mult + -32767 = -2147352578 |
| 677 | M_L_mult -32767 + = -2147352578 |
| 678 | M_L_mult + 2 = 131068 |
| 679 | M_L_mult + 1 = 65534 |
| 680 | M_L_mult 1 + = 65534 |
| 681 | M_L_mult + 0 = 0 |
| 682 | M_L_mult 0 + = 0 |
| 683 | |