Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | #include "config.h" |
| 2 | |
| 3 | #if !PJMEDIA_LIBG7221_FUNCS_INLINED || \ |
| 4 | (PJMEDIA_LIBG7221_FUNCS_INLINED && defined(__BASIC_OP_H__)) |
| 5 | |
| 6 | /*___________________________________________________________________________ |
| 7 | | | |
| 8 | | Basic arithmetic operators. | |
| 9 | |___________________________________________________________________________| |
| 10 | */ |
| 11 | |
| 12 | /*___________________________________________________________________________ |
| 13 | | | |
| 14 | | Include-Files | |
| 15 | |___________________________________________________________________________| |
| 16 | */ |
| 17 | |
| 18 | //#include <stdio.h> |
| 19 | //#include <stdlib.h> |
| 20 | #include "typedef.h" |
| 21 | #include "basic_op.h" |
| 22 | #include <pj/assert.h> |
| 23 | |
| 24 | #if (WMOPS) |
| 25 | #include "count.h" |
| 26 | extern BASIC_OP multiCounter[MAXCOUNTERS]; |
| 27 | extern int currCounter; |
| 28 | |
| 29 | #endif |
| 30 | |
| 31 | /*___________________________________________________________________________ |
| 32 | | | |
| 33 | | Constants and Globals | |
| 34 | |___________________________________________________________________________| |
| 35 | */ |
| 36 | #if INCLUDE_UNSAFE |
| 37 | Flag g7221_Overflow = 0; |
| 38 | Flag g7221_Carry = 0; |
| 39 | #endif |
| 40 | |
| 41 | /*___________________________________________________________________________ |
| 42 | | | |
| 43 | | Functions | |
| 44 | |___________________________________________________________________________| |
| 45 | */ |
| 46 | /*___________________________________________________________________________ |
| 47 | | | |
| 48 | | Function Name : shr | |
| 49 | | | |
| 50 | | Purpose : | |
| 51 | | | |
| 52 | | Arithmetically shift the 16 bit input var1 right var2 positions with | |
| 53 | | sign extension. If var2 is negative, arithmetically shift var1 left by | |
| 54 | | -var2 with sign extension. Saturate the result in case of underflows or | |
| 55 | | overflows. | |
| 56 | | | |
| 57 | | Complexity weight : 1 | |
| 58 | | | |
| 59 | | Inputs : | |
| 60 | | | |
| 61 | | var1 | |
| 62 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 63 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 64 | | | |
| 65 | | var2 | |
| 66 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 67 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 68 | | | |
| 69 | | Outputs : | |
| 70 | | | |
| 71 | | none | |
| 72 | | | |
| 73 | | Return Value : | |
| 74 | | | |
| 75 | | var_out | |
| 76 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 77 | | range : 0xffff 8000 <= var_out <= 0x0000 7fff. | |
| 78 | |___________________________________________________________________________| |
| 79 | */ |
| 80 | LIBG7221_DEF(Word16) shr (Word16 var1, Word16 var2) |
| 81 | { |
| 82 | if (var2 < 0) |
| 83 | { |
| 84 | if (var2 < -16) |
| 85 | var2 = -16; |
| 86 | return shl_nocheck(var1, (Word16) -var2); |
| 87 | } |
| 88 | else |
| 89 | { |
| 90 | return shr_nocheck(var1, var2); |
| 91 | } |
| 92 | } |
| 93 | /* ------------------------- End of shr() ------------------------- */ |
| 94 | |
| 95 | |
| 96 | /*___________________________________________________________________________ |
| 97 | | | |
| 98 | | Function Name : shl | |
| 99 | | | |
| 100 | | Purpose : | |
| 101 | | | |
| 102 | | Arithmetically shift the 16 bit input var1 left var2 positions.Zero fill| |
| 103 | | the var2 LSB of the result. If var2 is negative, arithmetically shift | |
| 104 | | var1 right by -var2 with sign extension. Saturate the result in case of | |
| 105 | | underflows or overflows. | |
| 106 | | | |
| 107 | | Complexity weight : 1 | |
| 108 | | | |
| 109 | | Inputs : | |
| 110 | | | |
| 111 | | var1 | |
| 112 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 113 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 114 | | | |
| 115 | | var2 | |
| 116 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 117 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 118 | | | |
| 119 | | Outputs : | |
| 120 | | | |
| 121 | | none | |
| 122 | | | |
| 123 | | Return Value : | |
| 124 | | | |
| 125 | | var_out | |
| 126 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 127 | | range : 0xffff 8000 <= var_out <= 0x0000 7fff. | |
| 128 | |___________________________________________________________________________| |
| 129 | */ |
| 130 | LIBG7221_DEF(Word16) shl (Word16 var1, Word16 var2) |
| 131 | { |
| 132 | if (var2 < 0) |
| 133 | { |
| 134 | return shr_nocheck(var1, (Word16) -var2); |
| 135 | } |
| 136 | else |
| 137 | { |
| 138 | return shl_nocheck(var1, var2); |
| 139 | } |
| 140 | } |
| 141 | /* ------------------------- End of shl() ------------------------- */ |
| 142 | |
| 143 | |
| 144 | |
| 145 | /*___________________________________________________________________________ |
| 146 | | | |
| 147 | | Function Name : mult | |
| 148 | | | |
| 149 | | Purpose : | |
| 150 | | | |
| 151 | | Performs the multiplication of var1 by var2 and gives a 16 bit result | |
| 152 | | which is scaled i.e.: | |
| 153 | | mult(var1,var2) = extract_l(L_shr((var1 times var2),15)) and | |
| 154 | | mult(-32768,-32768) = 32767. | |
| 155 | | | |
| 156 | | Complexity weight : 1 | |
| 157 | | | |
| 158 | | Inputs : | |
| 159 | | | |
| 160 | | var1 | |
| 161 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 162 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 163 | | | |
| 164 | | var2 | |
| 165 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 166 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 167 | | | |
| 168 | | Outputs : | |
| 169 | | | |
| 170 | | none | |
| 171 | | | |
| 172 | | Return Value : | |
| 173 | | | |
| 174 | | var_out | |
| 175 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 176 | | range : 0xffff 8000 <= var_out <= 0x0000 7fff. | |
| 177 | |___________________________________________________________________________| |
| 178 | */ |
| 179 | LIBG7221_DEF(Word16) mult (Word16 var1, Word16 var2) |
| 180 | { |
| 181 | Word16 var_out; |
| 182 | Word32 L_product; |
| 183 | |
| 184 | L_product = (Word32) var1 *(Word32) var2; |
| 185 | |
| 186 | L_product = (L_product & (Word32) 0xffff8000L) >> 15; |
| 187 | |
| 188 | if (L_product & (Word32) 0x00010000L) |
| 189 | L_product = L_product | (Word32) 0xffff0000L; |
| 190 | |
| 191 | var_out = saturate (L_product); |
| 192 | #if (WMOPS) |
| 193 | multiCounter[currCounter].mult++; |
| 194 | #endif |
| 195 | return (var_out); |
| 196 | } |
| 197 | /* ------------------------- End of mult() ------------------------- */ |
| 198 | |
| 199 | |
| 200 | /*___________________________________________________________________________ |
| 201 | | | |
| 202 | | Function Name : L_msu | |
| 203 | | | |
| 204 | | Purpose : | |
| 205 | | | |
| 206 | | Multiply var1 by var2 and shift the result left by 1. Subtract the 32 | |
| 207 | | bit result to L_var3 with saturation, return a 32 bit result: | |
| 208 | | L_msu(L_var3,var1,var2) = L_sub(L_var3,L_mult(var1,var2)). | |
| 209 | | | |
| 210 | | Complexity weight : 1 | |
| 211 | | | |
| 212 | | Inputs : | |
| 213 | | | |
| 214 | | L_var3 32 bit long signed integer (Word32) whose value falls in the | |
| 215 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 216 | | | |
| 217 | | var1 | |
| 218 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 219 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 220 | | | |
| 221 | | var2 | |
| 222 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 223 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 224 | | | |
| 225 | | Outputs : | |
| 226 | | | |
| 227 | | none | |
| 228 | | | |
| 229 | | Return Value : | |
| 230 | | | |
| 231 | | L_var_out | |
| 232 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 233 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. | |
| 234 | |___________________________________________________________________________| |
| 235 | */ |
| 236 | LIBG7221_DEF(Word32) L_msu (Word32 L_var3, Word16 var1, Word16 var2) |
| 237 | { |
| 238 | Word32 L_var_out; |
| 239 | Word32 L_product; |
| 240 | |
| 241 | L_product = L_mult (var1, var2); |
| 242 | #if (WMOPS) |
| 243 | multiCounter[currCounter].L_mult--; |
| 244 | #endif |
| 245 | L_var_out = L_sub (L_var3, L_product); |
| 246 | #if (WMOPS) |
| 247 | multiCounter[currCounter].L_sub--; |
| 248 | multiCounter[currCounter].L_msu++; |
| 249 | #endif |
| 250 | return (L_var_out); |
| 251 | } |
| 252 | /* ------------------------- End of L_msu() ------------------------- */ |
| 253 | |
| 254 | #if INCLUDE_UNSAFE |
| 255 | /*___________________________________________________________________________ |
| 256 | | | |
| 257 | | Function Name : L_macNs | |
| 258 | | | |
| 259 | | Purpose : | |
| 260 | | | |
| 261 | | Multiply var1 by var2 and shift the result left by 1. Add the 32 bit | |
| 262 | | result to L_var3 without saturation, return a 32 bit result. Generate | |
| 263 | | carry and overflow values : | |
| 264 | | L_macNs(L_var3,var1,var2) = L_add_c(L_var3,L_mult(var1,var2)). | |
| 265 | | | |
| 266 | | Complexity weight : 1 | |
| 267 | | | |
| 268 | | Inputs : | |
| 269 | | | |
| 270 | | L_var3 32 bit long signed integer (Word32) whose value falls in the | |
| 271 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 272 | | | |
| 273 | | var1 | |
| 274 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 275 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 276 | | | |
| 277 | | var2 | |
| 278 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 279 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 280 | | | |
| 281 | | Outputs : | |
| 282 | | | |
| 283 | | none | |
| 284 | | | |
| 285 | | Return Value : | |
| 286 | | | |
| 287 | | L_var_out | |
| 288 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 289 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. | |
| 290 | | | |
| 291 | | Caution : | |
| 292 | | | |
| 293 | | In some cases the Carry flag has to be cleared or set before using | |
| 294 | | operators which take into account its value. | |
| 295 | |___________________________________________________________________________| |
| 296 | */ |
| 297 | LIBG7221_DEF(Word32) L_macNs (Word32 L_var3, Word16 var1, Word16 var2) |
| 298 | { |
| 299 | Word32 L_var_out; |
| 300 | |
| 301 | L_var_out = L_mult (var1, var2); |
| 302 | #if (WMOPS) |
| 303 | multiCounter[currCounter].L_mult--; |
| 304 | #endif |
| 305 | L_var_out = L_add_c (L_var3, L_var_out); |
| 306 | #if (WMOPS) |
| 307 | multiCounter[currCounter].L_add_c--; |
| 308 | multiCounter[currCounter].L_macNs++; |
| 309 | #endif |
| 310 | return (L_var_out); |
| 311 | } |
| 312 | #endif |
| 313 | /* ------------------------- End of L_macNs() ------------------------- */ |
| 314 | |
| 315 | #if INCLUDE_UNSAFE |
| 316 | /*___________________________________________________________________________ |
| 317 | | | |
| 318 | | Function Name : L_msuNs | |
| 319 | | | |
| 320 | | Purpose : | |
| 321 | | | |
| 322 | | Multiply var1 by var2 and shift the result left by 1. Subtract the 32 | |
| 323 | | bit result from L_var3 without saturation, return a 32 bit result. Ge- | |
| 324 | | nerate carry and overflow values : | |
| 325 | | L_msuNs(L_var3,var1,var2) = L_sub_c(L_var3,L_mult(var1,var2)). | |
| 326 | | | |
| 327 | | Complexity weight : 1 | |
| 328 | | | |
| 329 | | Inputs : | |
| 330 | | | |
| 331 | | L_var3 32 bit long signed integer (Word32) whose value falls in the | |
| 332 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 333 | | | |
| 334 | | var1 | |
| 335 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 336 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 337 | | | |
| 338 | | var2 | |
| 339 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 340 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 341 | | | |
| 342 | | Outputs : | |
| 343 | | | |
| 344 | | none | |
| 345 | | | |
| 346 | | Return Value : | |
| 347 | | | |
| 348 | | L_var_out | |
| 349 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 350 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. | |
| 351 | | | |
| 352 | | Caution : | |
| 353 | | | |
| 354 | | In some cases the Carry flag has to be cleared or set before using | |
| 355 | | operators which take into account its value. | |
| 356 | |___________________________________________________________________________| |
| 357 | */ |
| 358 | LIBG7221_DEF(Word32) L_msuNs (Word32 L_var3, Word16 var1, Word16 var2) |
| 359 | { |
| 360 | Word32 L_var_out; |
| 361 | |
| 362 | L_var_out = L_mult (var1, var2); |
| 363 | #if (WMOPS) |
| 364 | multiCounter[currCounter].L_mult--; |
| 365 | #endif |
| 366 | L_var_out = L_sub_c (L_var3, L_var_out); |
| 367 | #if (WMOPS) |
| 368 | multiCounter[currCounter].L_sub_c--; |
| 369 | multiCounter[currCounter].L_msuNs++; |
| 370 | #endif |
| 371 | return (L_var_out); |
| 372 | } |
| 373 | #endif |
| 374 | |
| 375 | /* ------------------------- End of L_msuNs() ------------------------- */ |
| 376 | |
| 377 | |
| 378 | #if INCLUDE_UNSAFE |
| 379 | /*___________________________________________________________________________ |
| 380 | | | |
| 381 | | Function Name : L_add_c | |
| 382 | | | |
| 383 | | Purpose : | |
| 384 | | | |
| 385 | | Performs 32 bits addition of the two 32 bits variables (L_var1+L_var2+C)| |
| 386 | | with carry. No saturation. Generate carry and Overflow values. The car- | |
| 387 | | ry and overflow values are binary variables which can be tested and as- | |
| 388 | | signed values. | |
| 389 | | | |
| 390 | | Complexity weight : 2 | |
| 391 | | | |
| 392 | | Inputs : | |
| 393 | | | |
| 394 | | L_var1 32 bit long signed integer (Word32) whose value falls in the | |
| 395 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 396 | | | |
| 397 | | L_var2 32 bit long signed integer (Word32) whose value falls in the | |
| 398 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 399 | | | |
| 400 | | Outputs : | |
| 401 | | | |
| 402 | | none | |
| 403 | | | |
| 404 | | Return Value : | |
| 405 | | | |
| 406 | | L_var_out | |
| 407 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 408 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. | |
| 409 | | | |
| 410 | | Caution : | |
| 411 | | | |
| 412 | | In some cases the Carry flag has to be cleared or set before using | |
| 413 | | operators which take into account its value. | |
| 414 | |___________________________________________________________________________| |
| 415 | */ |
| 416 | LIBG7221_DEF(Word32) L_add_c (Word32 L_var1, Word32 L_var2) |
| 417 | { |
| 418 | Word32 L_var_out; |
| 419 | Word32 L_test; |
| 420 | Flag carry_int = 0; |
| 421 | |
| 422 | L_var_out = L_var1 + L_var2 + GET_CARRY(); |
| 423 | |
| 424 | L_test = L_var1 + L_var2; |
| 425 | |
| 426 | if ((L_var1 > 0) && (L_var2 > 0) && (L_test < 0)) |
| 427 | { |
| 428 | SET_OVERFLOW(1); |
| 429 | carry_int = 0; |
| 430 | } |
| 431 | else |
| 432 | { |
| 433 | if ((L_var1 < 0) && (L_var2 < 0)) |
| 434 | { |
| 435 | if (L_test >= 0) |
| 436 | { |
| 437 | SET_OVERFLOW(1); |
| 438 | carry_int = 1; |
| 439 | } |
| 440 | else |
| 441 | { |
| 442 | SET_OVERFLOW(0); |
| 443 | carry_int = 1; |
| 444 | } |
| 445 | } |
| 446 | else |
| 447 | { |
| 448 | if (((L_var1 ^ L_var2) < 0) && (L_test >= 0)) |
| 449 | { |
| 450 | SET_OVERFLOW(0); |
| 451 | carry_int = 1; |
| 452 | } |
| 453 | else |
| 454 | { |
| 455 | SET_OVERFLOW(0); |
| 456 | carry_int = 0; |
| 457 | } |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | if (GET_CARRY()) |
| 462 | { |
| 463 | if (L_test == MAX_32) |
| 464 | { |
| 465 | SET_OVERFLOW(1); |
| 466 | SET_CARRY(carry_int); |
| 467 | } |
| 468 | else |
| 469 | { |
| 470 | if (L_test == (Word32) 0xFFFFFFFFL) |
| 471 | { |
| 472 | SET_CARRY(1); |
| 473 | } |
| 474 | else |
| 475 | { |
| 476 | SET_CARRY(carry_int); |
| 477 | } |
| 478 | } |
| 479 | } |
| 480 | else |
| 481 | { |
| 482 | SET_CARRY(carry_int); |
| 483 | } |
| 484 | |
| 485 | #if (WMOPS) |
| 486 | multiCounter[currCounter].L_add_c++; |
| 487 | #endif |
| 488 | return (L_var_out); |
| 489 | } |
| 490 | #endif |
| 491 | |
| 492 | /* ------------------------- End of L_add_c() ------------------------- */ |
| 493 | |
| 494 | #if INCLUDE_UNSAFE |
| 495 | /*___________________________________________________________________________ |
| 496 | | | |
| 497 | | Function Name : L_sub_c | |
| 498 | | | |
| 499 | | Purpose : | |
| 500 | | | |
| 501 | | Performs 32 bits subtraction of the two 32 bits variables with carry | |
| 502 | | (borrow) : L_var1-L_var2-C. No saturation. Generate carry and Overflow | |
| 503 | | values. The carry and overflow values are binary variables which can | |
| 504 | | be tested and assigned values. | |
| 505 | | | |
| 506 | | Complexity weight : 2 | |
| 507 | | | |
| 508 | | Inputs : | |
| 509 | | | |
| 510 | | L_var1 32 bit long signed integer (Word32) whose value falls in the | |
| 511 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 512 | | | |
| 513 | | L_var2 32 bit long signed integer (Word32) whose value falls in the | |
| 514 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 515 | | | |
| 516 | | Outputs : | |
| 517 | | | |
| 518 | | none | |
| 519 | | | |
| 520 | | Return Value : | |
| 521 | | | |
| 522 | | L_var_out | |
| 523 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 524 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. | |
| 525 | | | |
| 526 | | Caution : | |
| 527 | | | |
| 528 | | In some cases the Carry flag has to be cleared or set before using | |
| 529 | | operators which take into account its value. | |
| 530 | |___________________________________________________________________________| |
| 531 | */ |
| 532 | LIBG7221_DEF(Word32) L_sub_c (Word32 L_var1, Word32 L_var2) |
| 533 | { |
| 534 | Word32 L_var_out; |
| 535 | Word32 L_test; |
| 536 | Flag carry_int = 0; |
| 537 | |
| 538 | if (GET_CARRY()) |
| 539 | { |
| 540 | SET_CARRY(0); |
| 541 | if (L_var2 != MIN_32) |
| 542 | { |
| 543 | L_var_out = L_add_c (L_var1, -L_var2); |
| 544 | #if (WMOPS) |
| 545 | multiCounter[currCounter].L_add_c--; |
| 546 | #endif |
| 547 | } |
| 548 | else |
| 549 | { |
| 550 | L_var_out = L_var1 - L_var2; |
| 551 | if (L_var1 > 0L) |
| 552 | { |
| 553 | SET_OVERFLOW(1); |
| 554 | SET_CARRY(0); |
| 555 | } |
| 556 | } |
| 557 | } |
| 558 | else |
| 559 | { |
| 560 | L_var_out = L_var1 - L_var2 - (Word32) 0X00000001L; |
| 561 | L_test = L_var1 - L_var2; |
| 562 | |
| 563 | if ((L_test < 0) && (L_var1 > 0) && (L_var2 < 0)) |
| 564 | { |
| 565 | SET_OVERFLOW(1); |
| 566 | carry_int = 0; |
| 567 | } |
| 568 | else if ((L_test > 0) && (L_var1 < 0) && (L_var2 > 0)) |
| 569 | { |
| 570 | SET_OVERFLOW(1); |
| 571 | carry_int = 1; |
| 572 | } |
| 573 | else if ((L_test > 0) && ((L_var1 ^ L_var2) > 0)) |
| 574 | { |
| 575 | SET_OVERFLOW(0); |
| 576 | carry_int = 1; |
| 577 | } |
| 578 | if (L_test == MIN_32) |
| 579 | { |
| 580 | SET_OVERFLOW(1); |
| 581 | SET_CARRY(carry_int); |
| 582 | } |
| 583 | else |
| 584 | { |
| 585 | SET_CARRY(carry_int); |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | #if (WMOPS) |
| 590 | multiCounter[currCounter].L_sub_c++; |
| 591 | #endif |
| 592 | return (L_var_out); |
| 593 | } |
| 594 | #endif |
| 595 | /* ------------------------- End of L_sub_c() ------------------------- */ |
| 596 | |
| 597 | |
| 598 | /*___________________________________________________________________________ |
| 599 | | | |
| 600 | | Function Name : L_negate | |
| 601 | | | |
| 602 | | Purpose : | |
| 603 | | | |
| 604 | | Negate the 32 bit variable L_var1 with saturation; saturate in the case | |
| 605 | | where input is -2147483648 (0x8000 0000). | |
| 606 | | | |
| 607 | | Complexity weight : 2 | |
| 608 | | | |
| 609 | | Inputs : | |
| 610 | | | |
| 611 | | L_var1 32 bit long signed integer (Word32) whose value falls in the | |
| 612 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 613 | | | |
| 614 | | Outputs : | |
| 615 | | | |
| 616 | | none | |
| 617 | | | |
| 618 | | Return Value : | |
| 619 | | | |
| 620 | | L_var_out | |
| 621 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 622 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. | |
| 623 | |___________________________________________________________________________| |
| 624 | */ |
| 625 | LIBG7221_DEF(Word32) L_negate (Word32 L_var1) |
| 626 | { |
| 627 | Word32 L_var_out; |
| 628 | |
| 629 | L_var_out = (L_var1 == MIN_32) ? MAX_32 : -L_var1; |
| 630 | #if (WMOPS) |
| 631 | multiCounter[currCounter].L_negate++; |
| 632 | #endif |
| 633 | return (L_var_out); |
| 634 | } |
| 635 | /* ------------------------- End of L_negate() ------------------------- */ |
| 636 | |
| 637 | |
| 638 | /*___________________________________________________________________________ |
| 639 | | | |
| 640 | | Function Name : mult_r | |
| 641 | | | |
| 642 | | Purpose : | |
| 643 | | | |
| 644 | | Same as mult with rounding, i.e.: | |
| 645 | | mult_r(var1,var2) = extract_l(L_shr(((var1 * var2) + 16384),15)) and | |
| 646 | | mult_r(-32768,-32768) = 32767. | |
| 647 | | | |
| 648 | | Complexity weight : 2 | |
| 649 | | | |
| 650 | | Inputs : | |
| 651 | | | |
| 652 | | var1 | |
| 653 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 654 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 655 | | | |
| 656 | | var2 | |
| 657 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 658 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 659 | | | |
| 660 | | Outputs : | |
| 661 | | | |
| 662 | | none | |
| 663 | | | |
| 664 | | Return Value : | |
| 665 | | | |
| 666 | | var_out | |
| 667 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 668 | | range : 0xffff 8000 <= var_out <= 0x0000 7fff. | |
| 669 | |___________________________________________________________________________| |
| 670 | */ |
| 671 | LIBG7221_DEF(Word16) mult_r (Word16 var1, Word16 var2) |
| 672 | { |
| 673 | Word16 var_out; |
| 674 | Word32 L_product_arr; |
| 675 | |
| 676 | L_product_arr = (Word32) var1 *(Word32) var2; /* product */ |
| 677 | L_product_arr += (Word32) 0x00004000L; /* round */ |
| 678 | L_product_arr &= (Word32) 0xffff8000L; |
| 679 | L_product_arr >>= 15; /* shift */ |
| 680 | |
| 681 | if (L_product_arr & (Word32) 0x00010000L) /* sign extend when necessary */ |
| 682 | { |
| 683 | L_product_arr |= (Word32) 0xffff0000L; |
| 684 | } |
| 685 | var_out = saturate (L_product_arr); |
| 686 | #if (WMOPS) |
| 687 | multiCounter[currCounter].mult_r++; |
| 688 | #endif |
| 689 | return (var_out); |
| 690 | } |
| 691 | /* ------------------------- End of mult_r() ------------------------- */ |
| 692 | |
| 693 | |
| 694 | |
| 695 | /*___________________________________________________________________________ |
| 696 | | | |
| 697 | | Function Name : shr_r | |
| 698 | | | |
| 699 | | Purpose : | |
| 700 | | | |
| 701 | | Same as shr(var1,var2) but with rounding. Saturate the result in case of| |
| 702 | | underflows or overflows : | |
| 703 | | - If var2 is greater than zero : | |
| 704 | | if (sub(shl(shr(var1,var2),1),shr(var1,sub(var2,1)))) | |
| 705 | | is equal to zero | |
| 706 | | then | |
| 707 | | shr_r(var1,var2) = shr(var1,var2) | |
| 708 | | else | |
| 709 | | shr_r(var1,var2) = add(shr(var1,var2),1) | |
| 710 | | - If var2 is less than or equal to zero : | |
| 711 | | shr_r(var1,var2) = shr(var1,var2). | |
| 712 | | | |
| 713 | | Complexity weight : 2 | |
| 714 | | | |
| 715 | | Inputs : | |
| 716 | | | |
| 717 | | var1 | |
| 718 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 719 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 720 | | | |
| 721 | | var2 | |
| 722 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 723 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 724 | | | |
| 725 | | Outputs : | |
| 726 | | | |
| 727 | | none | |
| 728 | | | |
| 729 | | Return Value : | |
| 730 | | | |
| 731 | | var_out | |
| 732 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 733 | | range : 0xffff 8000 <= var_out <= 0x0000 7fff. | |
| 734 | |___________________________________________________________________________| |
| 735 | */ |
| 736 | LIBG7221_DEF(Word16) shr_r (Word16 var1, Word16 var2) |
| 737 | { |
| 738 | Word16 var_out; |
| 739 | |
| 740 | if (var2 > 15) |
| 741 | { |
| 742 | var_out = 0; |
| 743 | } |
| 744 | else |
| 745 | { |
| 746 | var_out = shr (var1, var2); |
| 747 | #if (WMOPS) |
| 748 | multiCounter[currCounter].shr--; |
| 749 | #endif |
| 750 | |
| 751 | if (var2 > 0) |
| 752 | { |
| 753 | if ((var1 & ((Word16) 1 << (var2 - 1))) != 0) |
| 754 | { |
| 755 | var_out++; |
| 756 | } |
| 757 | } |
| 758 | } |
| 759 | #if (WMOPS) |
| 760 | multiCounter[currCounter].shr_r++; |
| 761 | #endif |
| 762 | return (var_out); |
| 763 | } |
| 764 | /* ------------------------- End of shr_r() ------------------------- */ |
| 765 | |
| 766 | |
| 767 | /*___________________________________________________________________________ |
| 768 | | | |
| 769 | | Function Name : mac_r | |
| 770 | | | |
| 771 | | Purpose : | |
| 772 | | | |
| 773 | | Multiply var1 by var2 and shift the result left by 1. Add the 32 bit | |
| 774 | | result to L_var3 with saturation. Round the LS 16 bits of the result | |
| 775 | | into the MS 16 bits with saturation and shift the result right by 16. | |
| 776 | | Return a 16 bit result. | |
| 777 | | mac_r(L_var3,var1,var2) = round(L_mac(L_var3,var1,var2)) | |
| 778 | | | |
| 779 | | Complexity weight : 2 | |
| 780 | | | |
| 781 | | Inputs : | |
| 782 | | | |
| 783 | | L_var3 32 bit long signed integer (Word32) whose value falls in the | |
| 784 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 785 | | | |
| 786 | | var1 | |
| 787 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 788 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 789 | | | |
| 790 | | var2 | |
| 791 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 792 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 793 | | | |
| 794 | | Outputs : | |
| 795 | | | |
| 796 | | none | |
| 797 | | | |
| 798 | | Return Value : | |
| 799 | | | |
| 800 | | var_out | |
| 801 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 802 | | range : 0x0000 8000 <= L_var_out <= 0x0000 7fff. | |
| 803 | |___________________________________________________________________________| |
| 804 | */ |
| 805 | LIBG7221_DEF(Word16) mac_r (Word32 L_var3, Word16 var1, Word16 var2) |
| 806 | { |
| 807 | Word16 var_out; |
| 808 | |
| 809 | L_var3 = L_mac (L_var3, var1, var2); |
| 810 | #if (WMOPS) |
| 811 | multiCounter[currCounter].L_mac--; |
| 812 | #endif |
| 813 | L_var3 = L_add (L_var3, (Word32) 0x00008000L); |
| 814 | #if (WMOPS) |
| 815 | multiCounter[currCounter].L_add--; |
| 816 | #endif |
| 817 | var_out = extract_h (L_var3); |
| 818 | #if (WMOPS) |
| 819 | multiCounter[currCounter].extract_h--; |
| 820 | multiCounter[currCounter].mac_r++; |
| 821 | #endif |
| 822 | return (var_out); |
| 823 | } |
| 824 | /* ------------------------- End of mac_r() ------------------------- */ |
| 825 | |
| 826 | |
| 827 | /*___________________________________________________________________________ |
| 828 | | | |
| 829 | | Function Name : msu_r | |
| 830 | | | |
| 831 | | Purpose : | |
| 832 | | | |
| 833 | | Multiply var1 by var2 and shift the result left by 1. Subtract the 32 | |
| 834 | | bit result to L_var3 with saturation. Round the LS 16 bits of the res- | |
| 835 | | ult into the MS 16 bits with saturation and shift the result right by | |
| 836 | | 16. Return a 16 bit result. | |
| 837 | | msu_r(L_var3,var1,var2) = round(L_msu(L_var3,var1,var2)) | |
| 838 | | | |
| 839 | | Complexity weight : 2 | |
| 840 | | | |
| 841 | | Inputs : | |
| 842 | | | |
| 843 | | L_var3 32 bit long signed integer (Word32) whose value falls in the | |
| 844 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 845 | | | |
| 846 | | var1 | |
| 847 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 848 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 849 | | | |
| 850 | | var2 | |
| 851 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 852 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 853 | | | |
| 854 | | Outputs : | |
| 855 | | | |
| 856 | | none | |
| 857 | | | |
| 858 | | Return Value : | |
| 859 | | | |
| 860 | | var_out | |
| 861 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 862 | | range : 0x0000 8000 <= L_var_out <= 0x0000 7fff. | |
| 863 | |___________________________________________________________________________| |
| 864 | */ |
| 865 | LIBG7221_DEF(Word16) msu_r (Word32 L_var3, Word16 var1, Word16 var2) |
| 866 | { |
| 867 | Word16 var_out; |
| 868 | |
| 869 | L_var3 = L_msu (L_var3, var1, var2); |
| 870 | #if (WMOPS) |
| 871 | multiCounter[currCounter].L_msu--; |
| 872 | #endif |
| 873 | L_var3 = L_add (L_var3, (Word32) 0x00008000L); |
| 874 | #if (WMOPS) |
| 875 | multiCounter[currCounter].L_add--; |
| 876 | #endif |
| 877 | var_out = extract_h (L_var3); |
| 878 | #if (WMOPS) |
| 879 | multiCounter[currCounter].extract_h--; |
| 880 | multiCounter[currCounter].msu_r++; |
| 881 | #endif |
| 882 | return (var_out); |
| 883 | } |
| 884 | /* ------------------------- End of msu_r() ------------------------- */ |
| 885 | |
| 886 | |
| 887 | /*___________________________________________________________________________ |
| 888 | | | |
| 889 | | Function Name : L_deposit_h | |
| 890 | | | |
| 891 | | Purpose : | |
| 892 | | | |
| 893 | | Deposit the 16 bit var1 into the 16 MS bits of the 32 bit output. The | |
| 894 | | 16 LS bits of the output are zeroed. | |
| 895 | | | |
| 896 | | Complexity weight : 2 | |
| 897 | | | |
| 898 | | Inputs : | |
| 899 | | | |
| 900 | | var1 | |
| 901 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 902 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 903 | | | |
| 904 | | Outputs : | |
| 905 | | | |
| 906 | | none | |
| 907 | | | |
| 908 | | Return Value : | |
| 909 | | | |
| 910 | | L_var_out | |
| 911 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 912 | | range : 0x8000 0000 <= var_out <= 0x7fff 0000. | |
| 913 | |___________________________________________________________________________| |
| 914 | */ |
| 915 | LIBG7221_DEF(Word32) L_deposit_h (Word16 var1) |
| 916 | { |
| 917 | Word32 L_var_out; |
| 918 | |
| 919 | L_var_out = (Word32) var1 << 16; |
| 920 | #if (WMOPS) |
| 921 | multiCounter[currCounter].L_deposit_h++; |
| 922 | #endif |
| 923 | return (L_var_out); |
| 924 | } |
| 925 | /* ------------------------- End of L_deposit_h() ------------------------- */ |
| 926 | |
| 927 | |
| 928 | /*___________________________________________________________________________ |
| 929 | | | |
| 930 | | Function Name : L_deposit_l | |
| 931 | | | |
| 932 | | Purpose : | |
| 933 | | | |
| 934 | | Deposit the 16 bit var1 into the 16 LS bits of the 32 bit output. The | |
| 935 | | 16 MS bits of the output are sign extended. | |
| 936 | | | |
| 937 | | Complexity weight : 2 | |
| 938 | | | |
| 939 | | Inputs : | |
| 940 | | | |
| 941 | | var1 | |
| 942 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 943 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 944 | | | |
| 945 | | Outputs : | |
| 946 | | | |
| 947 | | none | |
| 948 | | | |
| 949 | | Return Value : | |
| 950 | | | |
| 951 | | L_var_out | |
| 952 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 953 | | range : 0xFFFF 8000 <= var_out <= 0x0000 7fff. | |
| 954 | |___________________________________________________________________________| |
| 955 | */ |
| 956 | LIBG7221_DEF(Word32) L_deposit_l (Word16 var1) |
| 957 | { |
| 958 | Word32 L_var_out; |
| 959 | |
| 960 | L_var_out = (Word32) var1; |
| 961 | #if (WMOPS) |
| 962 | multiCounter[currCounter].L_deposit_l++; |
| 963 | #endif |
| 964 | return (L_var_out); |
| 965 | } |
| 966 | /* ------------------------- End of L_deposit_l() ------------------------- */ |
| 967 | |
| 968 | |
| 969 | /*___________________________________________________________________________ |
| 970 | | | |
| 971 | | Function Name : L_shr_r | |
| 972 | | | |
| 973 | | Purpose : | |
| 974 | | | |
| 975 | | Same as L_shr(L_var1,var2) but with rounding. Saturate the result in | |
| 976 | | case of underflows or overflows : | |
| 977 | | - If var2 is greater than zero : | |
| 978 | | if (L_sub(L_shl(L_shr(L_var1,var2),1),L_shr(L_var1,sub(var2,1))))| |
| 979 | | is equal to zero | |
| 980 | | then | |
| 981 | | L_shr_r(L_var1,var2) = L_shr(L_var1,var2) | |
| 982 | | else | |
| 983 | | L_shr_r(L_var1,var2) = L_add(L_shr(L_var1,var2),1) | |
| 984 | | - If var2 is less than or equal to zero : | |
| 985 | | L_shr_r(L_var1,var2) = L_shr(L_var1,var2). | |
| 986 | | | |
| 987 | | Complexity weight : 3 | |
| 988 | | | |
| 989 | | Inputs : | |
| 990 | | | |
| 991 | | L_var1 | |
| 992 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 993 | | range : 0x8000 0000 <= var1 <= 0x7fff ffff. | |
| 994 | | | |
| 995 | | var2 | |
| 996 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 997 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 998 | | | |
| 999 | | Outputs : | |
| 1000 | | | |
| 1001 | | none | |
| 1002 | | | |
| 1003 | | Return Value : | |
| 1004 | | | |
| 1005 | | L_var_out | |
| 1006 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 1007 | | range : 0x8000 0000 <= var_out <= 0x7fff ffff. | |
| 1008 | |___________________________________________________________________________| |
| 1009 | */ |
| 1010 | LIBG7221_DEF(Word32) L_shr_r (Word32 L_var1, Word16 var2) |
| 1011 | { |
| 1012 | Word32 L_var_out; |
| 1013 | |
| 1014 | if (var2 > 31) |
| 1015 | { |
| 1016 | L_var_out = 0; |
| 1017 | } |
| 1018 | else |
| 1019 | { |
| 1020 | L_var_out = L_shr (L_var1, var2); |
| 1021 | #if (WMOPS) |
| 1022 | multiCounter[currCounter].L_shr--; |
| 1023 | #endif |
| 1024 | if (var2 > 0) |
| 1025 | { |
| 1026 | if ((L_var1 & ((Word32) 1 << (var2 - 1))) != 0) |
| 1027 | { |
| 1028 | L_var_out++; |
| 1029 | } |
| 1030 | } |
| 1031 | } |
| 1032 | #if (WMOPS) |
| 1033 | multiCounter[currCounter].L_shr_r++; |
| 1034 | #endif |
| 1035 | return (L_var_out); |
| 1036 | } |
| 1037 | /* ------------------------- End of L_shr_r() ------------------------- */ |
| 1038 | |
| 1039 | |
| 1040 | /*___________________________________________________________________________ |
| 1041 | | | |
| 1042 | | Function Name : L_abs | |
| 1043 | | | |
| 1044 | | Purpose : | |
| 1045 | | | |
| 1046 | | Absolute value of L_var1; Saturate in case where the input is | |
| 1047 | | -214783648 | |
| 1048 | | | |
| 1049 | | Complexity weight : 3 | |
| 1050 | | | |
| 1051 | | Inputs : | |
| 1052 | | | |
| 1053 | | L_var1 | |
| 1054 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 1055 | | range : 0x8000 0000 <= var1 <= 0x7fff ffff. | |
| 1056 | | | |
| 1057 | | Outputs : | |
| 1058 | | | |
| 1059 | | none | |
| 1060 | | | |
| 1061 | | Return Value : | |
| 1062 | | | |
| 1063 | | L_var_out | |
| 1064 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 1065 | | range : 0x0000 0000 <= var_out <= 0x7fff ffff. | |
| 1066 | |___________________________________________________________________________| |
| 1067 | */ |
| 1068 | LIBG7221_DEF(Word32) L_abs (Word32 L_var1) |
| 1069 | { |
| 1070 | Word32 L_var_out; |
| 1071 | |
| 1072 | if (L_var1 == MIN_32) |
| 1073 | { |
| 1074 | L_var_out = MAX_32; |
| 1075 | } |
| 1076 | else |
| 1077 | { |
| 1078 | if (L_var1 < 0) |
| 1079 | { |
| 1080 | L_var_out = -L_var1; |
| 1081 | } |
| 1082 | else |
| 1083 | { |
| 1084 | L_var_out = L_var1; |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | #if (WMOPS) |
| 1089 | multiCounter[currCounter].L_abs++; |
| 1090 | #endif |
| 1091 | return (L_var_out); |
| 1092 | } |
| 1093 | /* ------------------------- End of L_abs() ------------------------- */ |
| 1094 | |
| 1095 | |
| 1096 | /*___________________________________________________________________________ |
| 1097 | | | |
| 1098 | | Function Name : norm_s | |
| 1099 | | | |
| 1100 | | Purpose : | |
| 1101 | | | |
| 1102 | | Produces the number of left shift needed to normalize the 16 bit varia- | |
| 1103 | | ble var1 for positive values on the interval with minimum of 16384 and | |
| 1104 | | maximum of 32767, and for negative values on the interval with minimum | |
| 1105 | | of -32768 and maximum of -16384; in order to normalize the result, the | |
| 1106 | | following operation must be done : | |
| 1107 | | norm_var1 = shl(var1,norm_s(var1)). | |
| 1108 | | | |
| 1109 | | Complexity weight : 15 | |
| 1110 | | | |
| 1111 | | Inputs : | |
| 1112 | | | |
| 1113 | | var1 | |
| 1114 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1115 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 1116 | | | |
| 1117 | | Outputs : | |
| 1118 | | | |
| 1119 | | none | |
| 1120 | | | |
| 1121 | | Return Value : | |
| 1122 | | | |
| 1123 | | var_out | |
| 1124 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1125 | | range : 0x0000 0000 <= var_out <= 0x0000 000f. | |
| 1126 | |___________________________________________________________________________| |
| 1127 | */ |
| 1128 | LIBG7221_DEF(Word16) norm_s (Word16 var1) |
| 1129 | { |
| 1130 | Word16 var_out; |
| 1131 | |
| 1132 | if (var1 == 0) |
| 1133 | { |
| 1134 | var_out = 0; |
| 1135 | } |
| 1136 | else |
| 1137 | { |
| 1138 | if ((UWord16)var1 == (UWord16)0xffff) |
| 1139 | { |
| 1140 | var_out = 15; |
| 1141 | } |
| 1142 | else |
| 1143 | { |
| 1144 | if (var1 < 0) |
| 1145 | { |
| 1146 | var1 = (Word16)(~var1); |
| 1147 | } |
| 1148 | for (var_out = 0; var1 < 0x4000; var_out++) |
| 1149 | { |
| 1150 | var1 <<= 1; |
| 1151 | } |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | #if (WMOPS) |
| 1156 | multiCounter[currCounter].norm_s++; |
| 1157 | #endif |
| 1158 | return (var_out); |
| 1159 | } |
| 1160 | /* ------------------------- End of norm_s() ------------------------- */ |
| 1161 | |
| 1162 | |
| 1163 | /*___________________________________________________________________________ |
| 1164 | | | |
| 1165 | | Function Name : div_s | |
| 1166 | | | |
| 1167 | | Purpose : | |
| 1168 | | | |
| 1169 | | Produces a result which is the fractional integer division of var1 by | |
| 1170 | | var2; var1 and var2 must be positive and var2 must be greater or equal | |
| 1171 | | to var1; the result is positive (leading bit equal to 0) and truncated | |
| 1172 | | to 16 bits. | |
| 1173 | | If var1 = var2 then div(var1,var2) = 32767. | |
| 1174 | | | |
| 1175 | | Complexity weight : 18 | |
| 1176 | | | |
| 1177 | | Inputs : | |
| 1178 | | | |
| 1179 | | var1 | |
| 1180 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1181 | | range : 0x0000 0000 <= var1 <= var2 and var2 != 0. | |
| 1182 | | | |
| 1183 | | var2 | |
| 1184 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1185 | | range : var1 <= var2 <= 0x0000 7fff and var2 != 0. | |
| 1186 | | | |
| 1187 | | Outputs : | |
| 1188 | | | |
| 1189 | | none | |
| 1190 | | | |
| 1191 | | Return Value : | |
| 1192 | | | |
| 1193 | | var_out | |
| 1194 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1195 | | range : 0x0000 0000 <= var_out <= 0x0000 7fff. | |
| 1196 | | It's a Q15 value (point between b15 and b14). | |
| 1197 | |___________________________________________________________________________| |
| 1198 | */ |
| 1199 | LIBG7221_DEF(Word16) div_s (Word16 var1, Word16 var2) |
| 1200 | { |
| 1201 | Word16 var_out = 0; |
| 1202 | Word16 iteration; |
| 1203 | Word32 L_num; |
| 1204 | Word32 L_denom; |
| 1205 | |
| 1206 | if ((var1 > var2) || (var1 < 0) || (var2 < 0)) |
| 1207 | { |
| 1208 | //printf ("Division Error var1=%d var2=%d\n", var1, var2); |
| 1209 | //abort(); /* exit (0); */ |
| 1210 | pj_assert(!"Division Error"); |
| 1211 | } |
| 1212 | if (var2 == 0) |
| 1213 | { |
| 1214 | //printf ("Division by 0, Fatal error \n"); |
| 1215 | //abort(); /* exit (0); */ |
| 1216 | assert(!"Division by 0"); |
| 1217 | } |
| 1218 | if (var1 == 0) |
| 1219 | { |
| 1220 | var_out = 0; |
| 1221 | } |
| 1222 | else |
| 1223 | { |
| 1224 | if (var1 == var2) |
| 1225 | { |
| 1226 | var_out = MAX_16; |
| 1227 | } |
| 1228 | else |
| 1229 | { |
| 1230 | L_num = L_deposit_l (var1); |
| 1231 | #if (WMOPS) |
| 1232 | multiCounter[currCounter].L_deposit_l--; |
| 1233 | #endif |
| 1234 | L_denom = L_deposit_l (var2); |
| 1235 | #if (WMOPS) |
| 1236 | multiCounter[currCounter].L_deposit_l--; |
| 1237 | #endif |
| 1238 | |
| 1239 | for (iteration = 0; iteration < 15; iteration++) |
| 1240 | { |
| 1241 | var_out <<= 1; |
| 1242 | L_num <<= 1; |
| 1243 | |
| 1244 | if (L_num >= L_denom) |
| 1245 | { |
| 1246 | L_num = L_sub (L_num, L_denom); |
| 1247 | #if (WMOPS) |
| 1248 | multiCounter[currCounter].L_sub--; |
| 1249 | #endif |
| 1250 | var_out = add (var_out, 1); |
| 1251 | #if (WMOPS) |
| 1252 | multiCounter[currCounter].add--; |
| 1253 | #endif |
| 1254 | } |
| 1255 | } |
| 1256 | } |
| 1257 | } |
| 1258 | |
| 1259 | #if (WMOPS) |
| 1260 | multiCounter[currCounter].div_s++; |
| 1261 | #endif |
| 1262 | return (var_out); |
| 1263 | } |
| 1264 | /* ------------------------- End of div_s() ------------------------- */ |
| 1265 | |
| 1266 | |
| 1267 | /*___________________________________________________________________________ |
| 1268 | | | |
| 1269 | | Function Name : norm_l | |
| 1270 | | | |
| 1271 | | Purpose : | |
| 1272 | | | |
| 1273 | | Produces the number of left shifts needed to normalize the 32 bit varia-| |
| 1274 | | ble L_var1 for positive values on the interval with minimum of | |
| 1275 | | 1073741824 and maximum of 2147483647, and for negative values on the in-| |
| 1276 | | terval with minimum of -2147483648 and maximum of -1073741824; in order | |
| 1277 | | to normalize the result, the following operation must be done : | |
| 1278 | | norm_L_var1 = L_shl(L_var1,norm_l(L_var1)). | |
| 1279 | | | |
| 1280 | | Complexity weight : 30 | |
| 1281 | | | |
| 1282 | | Inputs : | |
| 1283 | | | |
| 1284 | | L_var1 | |
| 1285 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 1286 | | range : 0x8000 0000 <= var1 <= 0x7fff ffff. | |
| 1287 | | | |
| 1288 | | Outputs : | |
| 1289 | | | |
| 1290 | | none | |
| 1291 | | | |
| 1292 | | Return Value : | |
| 1293 | | | |
| 1294 | | var_out | |
| 1295 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1296 | | range : 0x0000 0000 <= var_out <= 0x0000 001f. | |
| 1297 | |___________________________________________________________________________| |
| 1298 | */ |
| 1299 | LIBG7221_DEF(Word16) norm_l (Word32 L_var1) |
| 1300 | { |
| 1301 | Word16 var_out; |
| 1302 | |
| 1303 | if (L_var1 == 0) |
| 1304 | { |
| 1305 | var_out = 0; |
| 1306 | } |
| 1307 | else |
| 1308 | { |
| 1309 | if (L_var1 == (Word32) 0xffffffffL) |
| 1310 | { |
| 1311 | var_out = 31; |
| 1312 | } |
| 1313 | else |
| 1314 | { |
| 1315 | if (L_var1 < 0) |
| 1316 | { |
| 1317 | L_var1 = ~L_var1; |
| 1318 | } |
| 1319 | for (var_out = 0; L_var1 < (Word32) 0x40000000L; var_out++) |
| 1320 | { |
| 1321 | L_var1 <<= 1; |
| 1322 | } |
| 1323 | } |
| 1324 | } |
| 1325 | |
| 1326 | #if (WMOPS) |
| 1327 | multiCounter[currCounter].norm_l++; |
| 1328 | #endif |
| 1329 | return (var_out); |
| 1330 | } |
| 1331 | /* ------------------------- End of norm_l() ------------------------- */ |
| 1332 | |
| 1333 | |
| 1334 | /* |
| 1335 | ***************************************************************** |
| 1336 | Additional operators extracted from the G.723.1 Library |
| 1337 | Adapted for WMOPS calculations |
| 1338 | ***************************************************************** |
| 1339 | */ |
| 1340 | |
| 1341 | /*___________________________________________________________________________ |
| 1342 | | | |
| 1343 | | Function Name : L_mls | |
| 1344 | | | |
| 1345 | | Purpose : | |
| 1346 | | | |
| 1347 | | Multiplies a 16 bit word v by a 32 bit word Lv and returns a 32 bit | |
| 1348 | | word (multiplying 16 by 32 bit words gives 48 bit word; the function | |
| 1349 | | extracts the 32 MSB and shift the result to the left by 1). | |
| 1350 | | | |
| 1351 | | A 32 bit word can be written as | |
| 1352 | | Lv = a + b * 2^16 | |
| 1353 | | where a= unsigned 16 LSBs and b= signed 16 MSBs. | |
| 1354 | | The function returns v * Lv / 2^15 which is equivalent to | |
| 1355 | | a*v / 2^15 + b*v*2 | |
| 1356 | | | |
| 1357 | | Complexity weight : 6 [to be confirmed] | |
| 1358 | | | |
| 1359 | | Inputs : | |
| 1360 | | | |
| 1361 | | Lv | |
| 1362 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 1363 | | range : 0x8000 0000 <= var1 <= 0x7fff ffff. | |
| 1364 | | v | |
| 1365 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1366 | | range : 0x8000 <= var1 <= 0x7fff. | |
| 1367 | | | |
| 1368 | | Outputs : | |
| 1369 | | | |
| 1370 | | none | |
| 1371 | | | |
| 1372 | | Return Value : | |
| 1373 | | | |
| 1374 | | var_out | |
| 1375 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 1376 | | range : 0x8000 0000 <= var_out <= 0x7fff ffff. | |
| 1377 | | | |
| 1378 | |___________________________________________________________________________| |
| 1379 | */ |
| 1380 | LIBG7221_DEF(Word32) L_mls (Word32 Lv, Word16 v) |
| 1381 | { |
| 1382 | Word32 Temp ; |
| 1383 | |
| 1384 | Temp = Lv & (Word32) 0x0000ffff ; |
| 1385 | Temp = Temp * (Word32) v ; |
| 1386 | Temp = L_shr_nocheck( Temp, (Word16) 15 ) ; |
| 1387 | Temp = L_mac( Temp, v, extract_h(Lv) ) ; |
| 1388 | |
| 1389 | #if (WMOPS) |
| 1390 | multiCounter[currCounter].L_shr--; |
| 1391 | multiCounter[currCounter].L_mac--; |
| 1392 | multiCounter[currCounter].extract_h--; |
| 1393 | multiCounter[currCounter].L_mls++; |
| 1394 | #endif |
| 1395 | |
| 1396 | return Temp ; |
| 1397 | } |
| 1398 | /* ------------------------- End of L_mls() ------------------------- */ |
| 1399 | |
| 1400 | |
| 1401 | /*__________________________________________________________________________ |
| 1402 | | | |
| 1403 | | Function Name : div_l | |
| 1404 | | | |
| 1405 | | Purpose : | |
| 1406 | | | |
| 1407 | | Produces a result which is the fractional integer division of L_var1 by| |
| 1408 | | var2; L_var1 and var2 must be positive and var2 << 16 must be greater or| |
| 1409 | | equal to L_var1; the result is positive (leading bit equal to 0) and | |
| 1410 | | truncated to 16 bits. | |
| 1411 | | If L_var1 == var2 << 16 then div_l(L_var1,var2) = 32767. | |
| 1412 | | | |
| 1413 | | Complexity weight : 20 | |
| 1414 | | | |
| 1415 | | Inputs : | |
| 1416 | | | |
| 1417 | | L_var1 | |
| 1418 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 1419 | | range : 0x0000 0000 <= var1 <= (var2 << 16) and var2 != 0. | |
| 1420 | | L_var1 must be considered as a Q.31 value | |
| 1421 | | | |
| 1422 | | var2 | |
| 1423 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1424 | | range : var1 <= (var2<< 16) <= 0x7fff0000 and var2 != 0. | |
| 1425 | | var2 must be considered as a Q.15 value | |
| 1426 | | | |
| 1427 | | Outputs : | |
| 1428 | | | |
| 1429 | | none | |
| 1430 | | | |
| 1431 | | Return Value : | |
| 1432 | | | |
| 1433 | | var_out | |
| 1434 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1435 | | range : 0x0000 0000 <= var_out <= 0x0000 7fff. | |
| 1436 | | It's a Q15 value (point between b15 and b14). | |
| 1437 | |___________________________________________________________________________| |
| 1438 | */ |
| 1439 | LIBG7221_DEF(Word16) div_l (Word32 L_num, Word16 den) |
| 1440 | { |
| 1441 | Word16 var_out = (Word16)0; |
| 1442 | Word32 L_den; |
| 1443 | Word16 iteration; |
| 1444 | |
| 1445 | #if (WMOPS) |
| 1446 | multiCounter[currCounter].div_l++; |
| 1447 | #endif |
| 1448 | |
| 1449 | if ( den == (Word16) 0 ) { |
| 1450 | //printf("Division by 0 in div_l, Fatal error \n"); |
| 1451 | //exit(0); |
| 1452 | assert(!"Division by 0"); |
| 1453 | } |
| 1454 | |
| 1455 | if ( (L_num < (Word32) 0) || (den < (Word16) 0) ) { |
| 1456 | //printf("Division Error in div_l, Fatal error \n"); |
| 1457 | //exit(0); |
| 1458 | assert(!"Division Error"); |
| 1459 | } |
| 1460 | |
| 1461 | L_den = L_deposit_h( den ) ; |
| 1462 | #if (WMOPS) |
| 1463 | multiCounter[currCounter].L_deposit_h--; |
| 1464 | #endif |
| 1465 | |
| 1466 | if ( L_num >= L_den ){ |
| 1467 | return MAX_16 ; |
| 1468 | } |
| 1469 | else { |
| 1470 | L_num = L_shr_nocheck(L_num, (Word16)1) ; |
| 1471 | L_den = L_shr_nocheck(L_den, (Word16)1); |
| 1472 | #if (WMOPS) |
| 1473 | multiCounter[currCounter].L_shr-=2; |
| 1474 | #endif |
| 1475 | for(iteration=(Word16)0; iteration< (Word16)15;iteration++) { |
| 1476 | var_out = shl_nocheck( var_out, (Word16)1); |
| 1477 | L_num = L_shl_nocheck( L_num, (Word16)1); |
| 1478 | #if (WMOPS) |
| 1479 | multiCounter[currCounter].shl--; |
| 1480 | multiCounter[currCounter].L_shl--; |
| 1481 | #endif |
| 1482 | if (L_num >= L_den) { |
| 1483 | L_num = L_sub(L_num,L_den); |
| 1484 | var_out = add(var_out, (Word16)1); |
| 1485 | #if (WMOPS) |
| 1486 | multiCounter[currCounter].L_sub--; |
| 1487 | multiCounter[currCounter].add--; |
| 1488 | #endif |
| 1489 | } |
| 1490 | } |
| 1491 | |
| 1492 | return var_out; |
| 1493 | } |
| 1494 | } |
| 1495 | /* ------------------------- End of div_l() ------------------------- */ |
| 1496 | |
| 1497 | |
| 1498 | /*__________________________________________________________________________ |
| 1499 | | | |
| 1500 | | Function Name : i_mult | |
| 1501 | | | |
| 1502 | | Purpose : | |
| 1503 | | | |
| 1504 | | Integer 16-bit multiplication. No overflow protection is performed if | |
| 1505 | | ORIGINAL_G7231 is defined. | |
| 1506 | | | |
| 1507 | | Complexity weight : TBD | |
| 1508 | | | |
| 1509 | | Inputs : | |
| 1510 | | | |
| 1511 | | a | |
| 1512 | | 16 bit short signed integer (Word16). | |
| 1513 | | | |
| 1514 | | b | |
| 1515 | | 16 bit short signed integer (Word16). | |
| 1516 | | | |
| 1517 | | Outputs : | |
| 1518 | | | |
| 1519 | | none | |
| 1520 | | | |
| 1521 | | Return Value : | |
| 1522 | | | |
| 1523 | | 16 bit short signed integer (Word16). No overflow checks | |
| 1524 | | are performed if ORIGINAL_G7231 is defined. | |
| 1525 | |___________________________________________________________________________| |
| 1526 | */ |
| 1527 | LIBG7221_DEF(Word16) i_mult (Word16 a, Word16 b) |
| 1528 | { |
| 1529 | #ifdef ORIGINAL_G7231 |
| 1530 | return a*b ; |
| 1531 | #else |
| 1532 | Word32 register c=a*b; |
| 1533 | #if (WMOPS) |
| 1534 | multiCounter[currCounter].i_mult++; |
| 1535 | #endif |
| 1536 | return saturate(c) ; |
| 1537 | #endif |
| 1538 | } |
| 1539 | /* ------------------------- End of i_mult() ------------------------- */ |
| 1540 | |
| 1541 | |
| 1542 | /* |
| 1543 | ********************************************************************** |
| 1544 | The following three operators are not part of the original |
| 1545 | G.729/G.723.1 set of basic operators and implement shiftless |
| 1546 | accumulation operation. |
| 1547 | ********************************************************************** |
| 1548 | */ |
| 1549 | |
| 1550 | /*___________________________________________________________________________ |
| 1551 | | |
| 1552 | | Function Name : L_mult0 |
| 1553 | | |
| 1554 | | Purpose : |
| 1555 | | |
| 1556 | | L_mult0 is the 32 bit result of the multiplication of var1 times var2 |
| 1557 | | without one left shift. |
| 1558 | | |
| 1559 | | Complexity weight : 1 |
| 1560 | | |
| 1561 | | Inputs : |
| 1562 | | |
| 1563 | | var1 16 bit short signed integer (Word16) whose value falls in the |
| 1564 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| 1565 | | |
| 1566 | | var2 16 bit short signed integer (Word16) whose value falls in the |
| 1567 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| 1568 | | |
| 1569 | | Return Value : |
| 1570 | | |
| 1571 | | L_var_out |
| 1572 | | 32 bit long signed integer (Word32) whose value falls in the |
| 1573 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
| 1574 | |___________________________________________________________________________ |
| 1575 | */ |
| 1576 | LIBG7221_DEF(Word32) L_mult0 (Word16 var1,Word16 var2) |
| 1577 | { |
| 1578 | Word32 L_var_out; |
| 1579 | |
| 1580 | L_var_out = (Word32)var1 * (Word32)var2; |
| 1581 | |
| 1582 | #if (WMOPS) |
| 1583 | multiCounter[currCounter].L_mult0++; |
| 1584 | #endif |
| 1585 | return(L_var_out); |
| 1586 | } |
| 1587 | /* ------------------------- End of L_mult0() ------------------------- */ |
| 1588 | |
| 1589 | |
| 1590 | /*___________________________________________________________________________ |
| 1591 | | |
| 1592 | | Function Name : L_mac0 |
| 1593 | | |
| 1594 | | Purpose : |
| 1595 | | |
| 1596 | | Multiply var1 by var2 (without left shift) and add the 32 bit result to |
| 1597 | | L_var3 with saturation, return a 32 bit result: |
| 1598 | | L_mac0(L_var3,var1,var2) = L_add(L_var3,(L_mult0(var1,var2)). |
| 1599 | | |
| 1600 | | Complexity weight : 1 |
| 1601 | | |
| 1602 | | Inputs : |
| 1603 | | |
| 1604 | | L_var3 32 bit long signed integer (Word32) whose value falls in the |
| 1605 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| 1606 | | |
| 1607 | | var1 16 bit short signed integer (Word16) whose value falls in the |
| 1608 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| 1609 | | |
| 1610 | | var2 16 bit short signed integer (Word16) whose value falls in the |
| 1611 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| 1612 | | |
| 1613 | | Return Value : |
| 1614 | | |
| 1615 | | L_var_out |
| 1616 | | 32 bit long signed integer (Word32) whose value falls in the |
| 1617 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
| 1618 | |___________________________________________________________________________ |
| 1619 | */ |
| 1620 | LIBG7221_DEF(Word32) L_mac0 (Word32 L_var3, Word16 var1, Word16 var2) |
| 1621 | { |
| 1622 | Word32 L_var_out; |
| 1623 | Word32 L_product; |
| 1624 | |
| 1625 | L_product = L_mult0(var1,var2); |
| 1626 | L_var_out = L_add(L_var3,L_product); |
| 1627 | |
| 1628 | #if (WMOPS) |
| 1629 | multiCounter[currCounter].L_mac0++; |
| 1630 | multiCounter[currCounter].L_mult0--; |
| 1631 | multiCounter[currCounter].L_add--; |
| 1632 | #endif |
| 1633 | return(L_var_out); |
| 1634 | } |
| 1635 | /* ------------------------- End of L_mac0() ------------------------- */ |
| 1636 | |
| 1637 | |
| 1638 | /*___________________________________________________________________________ |
| 1639 | | |
| 1640 | | Function Name : L_msu0 |
| 1641 | | |
| 1642 | | Purpose : |
| 1643 | | |
| 1644 | | Multiply var1 by var2 (without left shift) and subtract the 32 bit |
| 1645 | | result to L_var3 with saturation, return a 32 bit result: |
| 1646 | | L_msu0(L_var3,var1,var2) = L_sub(L_var3,(L_mult0(var1,var2)). |
| 1647 | | |
| 1648 | | Complexity weight : 1 |
| 1649 | | |
| 1650 | | Inputs : |
| 1651 | | |
| 1652 | | L_var3 32 bit long signed integer (Word32) whose value falls in the |
| 1653 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. |
| 1654 | | |
| 1655 | | var1 16 bit short signed integer (Word16) whose value falls in the |
| 1656 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| 1657 | | |
| 1658 | | var2 16 bit short signed integer (Word16) whose value falls in the |
| 1659 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. |
| 1660 | | |
| 1661 | | Return Value : |
| 1662 | | |
| 1663 | | L_var_out |
| 1664 | | 32 bit long signed integer (Word32) whose value falls in the |
| 1665 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. |
| 1666 | |___________________________________________________________________________ |
| 1667 | */ |
| 1668 | LIBG7221_DEF(Word32) L_msu0 (Word32 L_var3, Word16 var1, Word16 var2) |
| 1669 | { |
| 1670 | Word32 L_var_out; |
| 1671 | Word32 L_product; |
| 1672 | |
| 1673 | L_product = L_mult0(var1,var2); |
| 1674 | L_var_out = L_sub(L_var3,L_product); |
| 1675 | |
| 1676 | #if (WMOPS) |
| 1677 | multiCounter[currCounter].L_msu0++; |
| 1678 | multiCounter[currCounter].L_mult0--; |
| 1679 | multiCounter[currCounter].L_sub--; |
| 1680 | #endif |
| 1681 | return(L_var_out); |
| 1682 | } |
| 1683 | /* ------------------------- End of L_msu0() ------------------------- */ |
| 1684 | |
| 1685 | |
| 1686 | /*___________________________________________________________________________ |
| 1687 | | | |
| 1688 | | Function Name : LU_shl | |
| 1689 | | | |
| 1690 | | Purpose : | |
| 1691 | | | |
| 1692 | | Arithmetically shift the 32 bit input L_var1 left var2 positions. Zero | |
| 1693 | | fill the var2 LSB of the result. If var2 is negative, arithmetically | |
| 1694 | | shift L_var1 right by -var2 with sign extension. Saturate the result in | |
| 1695 | | case of underflows or overflows. | |
| 1696 | | | |
| 1697 | | Complexity weight : 2 | |
| 1698 | | | |
| 1699 | | Inputs : | |
| 1700 | | | |
| 1701 | | L_var1 32 bit long signed integer (Word32) whose value falls in the | |
| 1702 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 1703 | | | |
| 1704 | | var2 | |
| 1705 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1706 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 1707 | | | |
| 1708 | | Outputs : | |
| 1709 | | | |
| 1710 | | none | |
| 1711 | | | |
| 1712 | | Return Value : | |
| 1713 | | | |
| 1714 | | L_var_out | |
| 1715 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 1716 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. | |
| 1717 | |___________________________________________________________________________| |
| 1718 | */ |
| 1719 | LIBG7221_DEF(UWord32) LU_shl (UWord32 L_var1, Word16 var2) |
| 1720 | { |
| 1721 | Word16 neg_var2; |
| 1722 | UWord32 L_var_out = 0; |
| 1723 | |
| 1724 | if (var2 <= 0) |
| 1725 | { |
| 1726 | if (var2 < -32) |
| 1727 | var2 = -32; |
| 1728 | neg_var2 = negate(var2); |
| 1729 | L_var_out = LU_shr (L_var1, neg_var2); |
| 1730 | #if (WMOPS) |
| 1731 | multiCounter[currCounter].negate--; |
| 1732 | multiCounter[currCounter].LU_shr--; |
| 1733 | #endif |
| 1734 | } |
| 1735 | else |
| 1736 | { |
| 1737 | for (; var2 > 0; var2--) |
| 1738 | { |
| 1739 | if (L_var1 > (UWord32) 0X7fffffffL) |
| 1740 | { |
| 1741 | SET_OVERFLOW(1); |
| 1742 | L_var_out = UMAX_32; |
| 1743 | break; |
| 1744 | } |
| 1745 | else |
| 1746 | { |
| 1747 | if (L_var1 < (UWord32) 0x00000001L) |
| 1748 | { |
| 1749 | SET_OVERFLOW(1); |
| 1750 | L_var_out = (UWord32)MIN_32; |
| 1751 | break; |
| 1752 | } |
| 1753 | } |
| 1754 | L_var1 *= 2; |
| 1755 | L_var_out = L_var1; |
| 1756 | } |
| 1757 | } |
| 1758 | #if (WMOPS) |
| 1759 | multiCounter[currCounter].LU_shl++; |
| 1760 | #endif |
| 1761 | return (L_var_out); |
| 1762 | } |
| 1763 | /* ------------------------- End of LU_shl() ------------------------- */ |
| 1764 | |
| 1765 | |
| 1766 | /*___________________________________________________________________________ |
| 1767 | | | |
| 1768 | | Function Name : LU_shr | |
| 1769 | | | |
| 1770 | | Purpose : | |
| 1771 | | | |
| 1772 | | Arithmetically shift the 32 bit input L_var1 right var2 positions with | |
| 1773 | | sign extension. If var2 is negative, arithmetically shift L_var1 left | |
| 1774 | | by -var2 and zero fill the -var2 LSB of the result. Saturate the result | |
| 1775 | | in case of underflows or overflows. | |
| 1776 | | | |
| 1777 | | Complexity weight : 2 | |
| 1778 | | | |
| 1779 | | Inputs : | |
| 1780 | | | |
| 1781 | | L_var1 32 bit long signed integer (Word32) whose value falls in the | |
| 1782 | | range : 0x8000 0000 <= L_var3 <= 0x7fff ffff. | |
| 1783 | | | |
| 1784 | | var2 | |
| 1785 | | 16 bit short signed integer (Word16) whose value falls in the | |
| 1786 | | range : 0xffff 8000 <= var1 <= 0x0000 7fff. | |
| 1787 | | | |
| 1788 | | Outputs : | |
| 1789 | | | |
| 1790 | | none | |
| 1791 | | | |
| 1792 | | Return Value : | |
| 1793 | | | |
| 1794 | | L_var_out | |
| 1795 | | 32 bit long signed integer (Word32) whose value falls in the | |
| 1796 | | range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. | |
| 1797 | |___________________________________________________________________________| |
| 1798 | */ |
| 1799 | LIBG7221_DEF(UWord32) LU_shr (UWord32 L_var1, Word16 var2) |
| 1800 | { |
| 1801 | Word16 neg_var2; |
| 1802 | UWord32 L_var_out; |
| 1803 | |
| 1804 | if (var2 < 0) |
| 1805 | { |
| 1806 | if (var2 < -32) |
| 1807 | var2 = -32; |
| 1808 | neg_var2 = negate(var2); |
| 1809 | L_var_out = LU_shl (L_var1, neg_var2); |
| 1810 | #if (WMOPS) |
| 1811 | multiCounter[currCounter].negate--; |
| 1812 | multiCounter[currCounter].LU_shl--; |
| 1813 | #endif |
| 1814 | } |
| 1815 | else |
| 1816 | { |
| 1817 | if (var2 >= 32) |
| 1818 | { |
| 1819 | L_var_out = 0L; |
| 1820 | } |
| 1821 | else |
| 1822 | { |
| 1823 | L_var_out = L_var1 >> var2; |
| 1824 | } |
| 1825 | } |
| 1826 | #if (WMOPS) |
| 1827 | multiCounter[currCounter].LU_shr++; |
| 1828 | #endif |
| 1829 | return (L_var_out); |
| 1830 | } |
| 1831 | /* ------------------------- End of LU_shr() ------------------------- */ |
| 1832 | |
| 1833 | #endif /* PJMEDIA_LIBG7221_FUNCS_INLINED */ |
| 1834 | |
| 1835 | /* ************************** END OF BASOP32.C ************************** */ |