summaryrefslogtreecommitdiff
path: root/apps/plugins/lua/lobject.h
diff options
context:
space:
mode:
Diffstat (limited to 'apps/plugins/lua/lobject.h')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.1 at 2026-05-16 21:07:17 +0000
>58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2005 by Thom Johansen 
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
 
/* The following are assembler optimised version of the LPC filtering
   routines needed for FLAC decoding. They is optimised for use with the
   MCF5249 processor, or any other similar ColdFire core with the EMAC unit.
 */

/* This routine deals with sample widths 16 and lower. All LPC filtering up to
   order 10 is done in specially optimised unrolled loops, while every order
   above this is handled by a slower default routine.
 */
    .section .icode,"ax",@progbits
    .global lpc_decode_emac
    .align 2
lpc_decode_emac:
    lea.l (-44, %sp), %sp
    movem.l %d2-%d7/%a2-%a6, (%sp)
    movem.l (44+4, %sp), %d0-%d2/%a0-%a1
    /* d0 = blocksize, d1 = qlevel, d2 = pred_order
       a0 = data, a1 = coeffs
     */
     
    /* the data pointer always lags behind history pointer by 'pred_order'
       samples. since we have one loop for each order, we can hard code this
       and free a register by not saving data pointer. 
     */ 
    move.l %d2, %d3 
    neg.l %d3
    lea.l (%a0, %d3.l*4), %a0 | history
    clr.l %d3
    move.l %d3, %macsr        | we'll need integer mode for this
    tst.l %d0          
    jeq .exit                 | zero samples to process, exit
    moveq.l #10, %d3
    cmp.l %d3, %d2
    jgt .default              | order is over 10, jump to default case
    jmp.l (2, %pc, %d2.l*4)   | jump to loop corresponding to pred_order
| jumptable:
    bra.w .exit               | zero order filter isn't possible, exit function
    bra.w .order1
    bra.w .order2
    bra.w .order3
    bra.w .order4
    bra.w .order5
    bra.w .order6
    bra.w .order7
    bra.w .order8
    bra.w .order9

| last jump table entry coincides with target, so leave it out
.order10:
    movem.l (%a1), %d3-%d7/%a1-%a5 | load lpc coefs
    move.l (%a0)+, %a6             | load first history sample
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (%a0)+, %a6, %acc0
    mac.l %a6, %d7, (%a0)+, %a6, %acc0
    mac.l %a6, %d6, (%a0)+, %a6, %acc0
    mac.l %a6, %d5, (%a0)+, %a6, %acc0
    mac.l %a6, %d4, (%a0)+, %a6, %acc0
    mac.l %a6, %d3, (-9*4, %a0), %a6, %acc0 | load for the next iteration
    movclr.l %acc0, %d2    | get sum
    asr.l %d1, %d2         | shift sum by qlevel bits
    add.l %d2, (%a0)       | add residual and save
    lea.l (-8*4, %a0), %a0 | point history back at second element
    subq.l #1, %d0         | decrement sample count
    jne 1b                 | are we done?
    jra .exit

.order9:
    movem.l (%a1), %d4-%d7/%a1-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (%a0)+, %a6, %acc0
    mac.l %a6, %d7, (%a0)+, %a6, %acc0
    mac.l %a6, %d6, (%a0)+, %a6, %acc0
    mac.l %a6, %d5, (%a0)+, %a6, %acc0
    mac.l %a6, %d4, (-8*4, %a0), %a6, %acc0
    movclr.l %acc0, %d2
    asr.l %d1, %d2
    add.l %d2, (%a0)
    lea.l (-7*4, %a0), %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.order8:
    movem.l (%a1), %d5-%d7/%a1-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (%a0)+, %a6, %acc0
    mac.l %a6, %d7, (%a0)+, %a6, %acc0
    mac.l %a6, %d6, (%a0)+, %a6, %acc0
    mac.l %a6, %d5, (-7*4, %a0), %a6, %acc0
    movclr.l %acc0, %d2
    asr.l %d1, %d2
    add.l %d2, (%a0)
    lea.l (-6*4, %a0), %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.order7:
    movem.l (%a1), %d6-%d7/%a1-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (%a0)+, %a6, %acc0
    mac.l %a6, %d7, (%a0)+, %a6, %acc0
    mac.l %a6, %d6, (-6*4, %a0), %a6, %acc0
    movclr.l %acc0, %d2
    asr.l %d1, %d2
    add.l %d2, (%a0)
    lea.l (-5*4, %a0), %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.order6:
    movem.l (%a1), %d7/%a1-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (%a0)+, %a6, %acc0
    mac.l %a6, %d7, (-5*4, %a0), %a6, %acc0
    movclr.l %acc0, %d2
    asr.l %d1, %d2
    add.l %d2, (%a0)
    lea.l (-4*4, %a0), %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.order5:
    movem.l (%a1), %a1-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (-4*4, %a0), %a6, %acc0
    movclr.l %acc0, %d2
    asr.l %d1, %d2
    add.l %d2, (%a0)
    lea.l (-3*4, %a0), %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.order4:
    movem.l (%a1), %a2-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (-3*4, %a0), %a6, %acc0
    movclr.l %acc0, %d2
    asr.l %d1, %d2
    add.l %d2, (%a0)
    subq.l #8, %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.order3:
    movem.l (%a1), %a3-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (-2*4, %a0), %a6, %acc0
    movclr.l %acc0, %d2
    asr.l %d1, %d2
    add.l %d2, (%a0)
    subq.l #4, %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.order2:
    movem.l (%a1), %a4-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, %acc0    | data for next iteration is already loaded
    movclr.l %acc0, %d2
    asr.l %d1, %d2
    add.l %d2, (%a0)
    subq.l #1, %d0
    jne 1b
    jra .exit

.order1:
    | no point in using mac here
    move.l (%a1), %a5 
1:
    move.l %a5, %d2
    muls.l (%a0)+, %d2
    asr.l %d1, %d2
    add.l %d2, (%a0)
    subq.l #1, %d0
    jne 1b
    jra .exit
    
.default:
    /* we do the filtering in an unrolled by 4 loop as far as we can, and then
       do the rest by jump table. */
    lea.l (%a1, %d2.l*4), %a2 | need to start in the other end of coefs
    move.l %a0, %a3           | working copy of history pointer
    move.l %d2, %d3
    lsr.l #2, %d3             | coefs/4, num of iterations needed in next loop
    move.l (%a3)+, %a5        | preload data for loop
1:
    lea.l (-4*4, %a2), %a2    | move lpc coef pointer four samples backwards
    movem.l (%a2), %d4-%d7    | load four coefs
    mac.l %a5, %d7, (%a3)+, %a5, %acc0
    mac.l %a5, %d6, (%a3)+, %a5, %acc0
    mac.l %a5, %d5, (%a3)+, %a5, %acc0
    mac.l %a5, %d4, (%a3)+, %a5, %acc0
    subq.l #1, %d3            | any more unrolled loop operations left?
    jne 1b
    
    moveq.l #3, %d3           | mask 0x00000003
    and.l %d2, %d3            | get the remaining samples to be filtered
    jmp.l (2, %pc, %d3*2)     | then jump into mac.l chain
| jumptable:
    bra.b 3f                  | none left 
    bra.b 2f                  | one left
    bra.b 1f                  | two left
| three left
    move.l -(%a2), %d4
    mac.l %a5, %d4, (%a3)+, %a5, %acc0
1:
    move.l -(%a2), %d4
    mac.l %a5, %d4, (%a3)+, %a5, %acc0
2:
    move.l -(%a2), %d4
    mac.l %a5, %d4, (%a3)+, %a5, %acc0
3:
    movclr.l %acc0, %d3       | get result
    asr.l %d1, %d3            | shift qlevel bits right
    add.l %a5, %d3            | add residual, which is in a5 by now
    move.l %d3, -(%a3)        | save, a3 is also one past save location
    addq.l #4, %a0            | increment history pointer
    subq.l #1, %d0            | decrement sample count 
    jne .default              | are we done?
    jra .exit                 | if so, fall through to exit


/* This routine deals with sample widths 24 and lower. All LPC filtering up to
   order 8 is done in specially optimised unrolled loops, while every order
   above this is handled by a slower default routine.
 */
    .global lpc_decode_emac_wide
    .align 2
lpc_decode_emac_wide:
    lea.l (-44, %sp), %sp
    movem.l %d2-%d7/%a2-%a6, (%sp)
    movem.l (44+4, %sp), %d0-%d1/%d3/%a0-%a1
    /* d0 = blocksize, d1 = qlevel, d3 = pred_order
       a0 = data, a1 = coeffs
     */
     
    /* the data pointer always lags behind history pointer by 'pred_order'
       samples. since we have one loop for each order, we can hard code this
       and free a register by not saving data pointer. 
     */ 
    move.l %d3, %d2
    neg.l %d2
    lea.l (%a0, %d2.l*4), %a0 | history
    clr.l %d2
    move.l %d2, %macsr        | we'll need integer mode for this
    tst.l %d0          
    jeq .exit                 | zero samples to process, exit
    moveq.l #32, %d2
    sub.l %d1, %d2            | calculate shift amount for extension byte
    moveq.l #8, %d4
    cmp.l %d4, %d3
    jgt .wdefault             | order is over 8, jump to default case
    jmp.l (2, %pc, %d3.l*4)   | jump to loop corresponding to pred_order
| jumptable:
    bra.w .exit               | zero order filter isn't possible, exit function
    bra.w .worder1
    bra.w .worder2
    bra.w .worder3
    bra.w .worder4
    bra.w .worder5
    bra.w .worder6
    bra.w .worder7

| last jump table entry coincides with target, so leave it out
.worder8:
    movem.l (%a1), %d5-%d7/%a1-%a5 | load lpc coefs
    move.l (%a0)+, %a6             | load first history sample
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (%a0)+, %a6, %acc0
    mac.l %a6, %d7, (%a0)+, %a6, %acc0
    mac.l %a6, %d6, (%a0)+, %a6, %acc0
    mac.l %a6, %d5, (-7*4, %a0), %a6, %acc0 | load for the next iteration
    move.l %accext01, %d4  | get top 8 bits of sum
    movclr.l %acc0, %d3    | then botten 32 bits
    lsr.l %d1, %d3         | shift bottom bits qlevel bits right
    asl.l %d2, %d4         | shift top bits 32 - qlevel bits left
    or.l %d4, %d3          | now combine results
    add.l %d3, (%a0)       | add residual and save
    lea.l (-6*4, %a0), %a0 | point history back at second element
    subq.l #1, %d0         | decrement sample count
    jne 1b                 | are we done?
    jra .exit

.worder7:
    movem.l (%a1), %d6-%d7/%a1-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (%a0)+, %a6, %acc0
    mac.l %a6, %d7, (%a0)+, %a6, %acc0
    mac.l %a6, %d6, (-6*4, %a0), %a6, %acc0
    move.l %accext01, %d4
    movclr.l %acc0, %d3
    lsr.l %d1, %d3
    asl.l %d2, %d4
    or.l %d4, %d3
    add.l %d3, (%a0)
    lea.l (-5*4, %a0), %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.worder6:
    movem.l (%a1), %d7/%a1-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (%a0)+, %a6, %acc0
    mac.l %a6, %d7, (-5*4, %a0), %a6, %acc0
    move.l %accext01, %d4
    movclr.l %acc0, %d3
    lsr.l %d1, %d3
    asl.l %d2, %d4
    or.l %d4, %d3
    add.l %d3, (%a0)
    lea.l (-4*4, %a0), %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.worder5:
    movem.l (%a1), %a1-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (%a0)+, %a6, %acc0
    mac.l %a6, %a1, (-4*4, %a0), %a6, %acc0
    move.l %accext01, %d4
    movclr.l %acc0, %d3
    lsr.l %d1, %d3
    asl.l %d2, %d4
    or.l %d4, %d3
    add.l %d3, (%a0)
    lea.l (-3*4, %a0), %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.worder4:
    movem.l (%a1), %a2-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (%a0)+, %a6, %acc0
    mac.l %a6, %a2, (-3*4, %a0), %a6, %acc0
    move.l %accext01, %d4
    movclr.l %acc0, %d3
    lsr.l %d1, %d3
    asl.l %d2, %d4
    or.l %d4, %d3
    add.l %d3, (%a0)
    subq.l #8, %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.worder3:
    movem.l (%a1), %a3-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, (%a0)+, %a6, %acc0
    mac.l %a6, %a3, (-2*4, %a0), %a6, %acc0
    move.l %accext01, %d4
    movclr.l %acc0, %d3
    lsr.l %d1, %d3
    asl.l %d2, %d4
    or.l %d4, %d3
    add.l %d3, (%a0)
    subq.l #4, %a0
    subq.l #1, %d0
    jne 1b
    jra .exit

.worder2:
    movem.l (%a1), %a4-%a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0)+, %a6, %acc0
    mac.l %a6, %a4, %acc0    | data for next iteration is already loaded
    move.l %accext01, %d4
    movclr.l %acc0, %d3
    lsr.l %d1, %d3
    asl.l %d2, %d4
    or.l %d4, %d3
    add.l %d3, (%a0)
    subq.l #1, %d0
    jne 1b
    jra .exit

.worder1:
    move.l (%a1), %a5
    move.l (%a0)+, %a6
1:
    mac.l %a6, %a5, (%a0), %a6, %acc0
    move.l %accext01, %d4
    movclr.l %acc0, %d3
    lsr.l %d1, %d3
    asl.l %d2, %d4
    or.l %d4, %d3
    add.l %a6, %d3      | residual is already in a6
    move.l %d3, (%a0)+
    subq.l #1, %d0
    jne 1b
    jra .exit
    
.wdefault:
    /* we do the filtering in an unrolled by 4 loop as far as we can, and then
       do the rest by jump table. */
    lea.l (%a1, %d3.l*4), %a2 | need to start in the other end of coefs
    move.l %a0, %a3           | working copy of history pointer
    move.l %d3, %d4
    lsr.l #2, %d4             | coefs/4, num of iterations needed in next loop
    move.l (%a3)+, %a5        | preload data for loop
1:
    lea.l (-4*4, %a2), %a2     | move lpc coef pointer four samples backwards
    movem.l (%a2), %d5-%d7/%a4 | load four coefs
    mac.l %a5, %a4, (%a3)+, %a5, %acc0
    mac.l %a5, %d7, (%a3)+, %a5, %acc0
    mac.l %a5, %d6, (%a3)+, %a5, %acc0
    mac.l %a5, %d5, (%a3)+, %a5, %acc0
    subq.l #1, %d4            | any more unrolled loop operations left?
    jne 1b
    
    moveq.l #3, %d4           | mask 0x00000003
    and.l %d3, %d4            | get the remaining samples to be filtered
    jmp.l (2, %pc, %d4*2)     | then jump into mac.l chain
| jumptable:
    bra.b 3f                  | none left 
    bra.b 2f                  | one left
    bra.b 1f                  | two left
| three left
    move.l -(%a2), %d4
    mac.l %a5, %d4, (%a3)+, %a5, %acc0
1:
    move.l -(%a2), %d4
    mac.l %a5, %d4, (%a3)+, %a5, %acc0
2:
    move.l -(%a2), %d4
    mac.l %a5, %d4, (%a3)+, %a5, %acc0
3:
    move.l %accext01, %d5     | get high 32 bits of result
    movclr.l %acc0, %d4       | get low 32 bits of result
    lsr.l %d1, %d4            | shift qlevel bits right
    asl.l %d2, %d5            | shift 32 - qlevel bits left
    or.l %d5, %d4             | combine top and low bits after shift
    add.l %a5, %d4            | add residual, which is in a5 by now
    move.l %d4, -(%a3)        | save, a3 is also one past save location
    addq.l #4, %a0            | increment history pointer
    subq.l #1, %d0            | decrement sample count 
    jne .wdefault             | are we done?
                              | if so, fall through to exit

.exit:
    movem.l (%sp), %d2-%d7/%a2-%a6
    lea.l (44, %sp), %sp
    rts
generated by cgit v1.1 at 2026-05-16 21:07:17 +0000