ffmpeg/libavcodec/arm/simple_idct_armv5te.S

   1 /*
   2  * Simple IDCT
   3  *
   4  * Copyright (c) 2001 Michael Niedermayer <michaelni@gmx.at>
   5  * Copyright (c) 2006 Mans Rullgard <mans@mansr.com>
   6  *
   7  * This file is part of FFmpeg.
   8  *
   9  * FFmpeg is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * FFmpeg is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with FFmpeg; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include "libavutil/arm/asm.S"
  25
  26 #define W1  22725   /* cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 */
  27 #define W2  21407   /* cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 */
  28 #define W3  19266   /* cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 */
  29 #define W4  16383   /* cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 */
  30 #define W5  12873   /* cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 */
  31 #define W6  8867    /* cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 */
  32 #define W7  4520    /* cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 */
  33 #define ROW_SHIFT 11
  34 #define COL_SHIFT 20
  35
  36 #define W13 (W1 | (W3 << 16))
  37 #define W26 (W2 | (W6 << 16))
  38 #define W57 (W5 | (W7 << 16))
  39
  40 function idct_row_armv5te
  41         str    lr, [sp, #-4]!
  42
  43         ldrd   v1, v2, [a1, #8]
  44         ldrd   a3, a4, [a1]          /* a3 = row[1:0], a4 = row[3:2] */
  45         orrs   v1, v1, v2
  46         itt    eq
  47         cmpeq  v1, a4
  48         cmpeq  v1, a3, lsr #16
  49         beq    row_dc_only
  50
  51         mov    v1, #(1<<(ROW_SHIFT-1))
  52         mov    ip, #16384
  53         sub    ip, ip, #1            /* ip = W4 */
  54         smlabb v1, ip, a3, v1        /* v1 = W4*row[0]+(1<<(RS-1)) */
  55         ldr    ip, =W26              /* ip = W2 | (W6 << 16) */
  56         smultb a2, ip, a4
  57         smulbb lr, ip, a4
  58         add    v2, v1, a2
  59         sub    v3, v1, a2
  60         sub    v4, v1, lr
  61         add    v1, v1, lr
  62
  63         ldr    ip, =W13              /* ip = W1 | (W3 << 16) */
  64         ldr    lr, =W57              /* lr = W5 | (W7 << 16) */
  65         smulbt v5, ip, a3
  66         smultt v6, lr, a4
  67         smlatt v5, ip, a4, v5
  68         smultt a2, ip, a3
  69         smulbt v7, lr, a3
  70         sub    v6, v6, a2
  71         smulbt a2, ip, a4
  72         smultt fp, lr, a3
  73         sub    v7, v7, a2
  74         smulbt a2, lr, a4
  75         ldrd   a3, a4, [a1, #8]     /* a3=row[5:4] a4=row[7:6] */
  76         sub    fp, fp, a2
  77
  78         orrs   a2, a3, a4
  79         beq    1f
  80
  81         smlabt v5, lr, a3, v5
  82         smlabt v6, ip, a3, v6
  83         smlatt v5, lr, a4, v5
  84         smlabt v6, lr, a4, v6
  85         smlatt v7, lr, a3, v7
  86         smlatt fp, ip, a3, fp
  87         smulbt a2, ip, a4
  88         smlatt v7, ip, a4, v7
  89         sub    fp, fp, a2
  90
  91         ldr    ip, =W26              /* ip = W2 | (W6 << 16) */
  92         mov    a2, #16384
  93         sub    a2, a2, #1            /* a2 =  W4 */
  94         smulbb a2, a2, a3            /* a2 =  W4*row[4] */
  95         smultb lr, ip, a4            /* lr =  W6*row[6] */
  96         add    v1, v1, a2            /* v1 += W4*row[4] */
  97         add    v1, v1, lr            /* v1 += W6*row[6] */
  98         add    v4, v4, a2            /* v4 += W4*row[4] */
  99         sub    v4, v4, lr            /* v4 -= W6*row[6] */
 100         smulbb lr, ip, a4            /* lr =  W2*row[6] */
 101         sub    v2, v2, a2            /* v2 -= W4*row[4] */
 102         sub    v2, v2, lr            /* v2 -= W2*row[6] */
 103         sub    v3, v3, a2            /* v3 -= W4*row[4] */
 104         add    v3, v3, lr            /* v3 += W2*row[6] */
 105
 106 1:      add    a2, v1, v5
 107         mov    a3, a2, lsr #11
 108         bic    a3, a3, #0x1f0000
 109         sub    a2, v2, v6
 110         mov    a2, a2, lsr #11
 111         add    a3, a3, a2, lsl #16
 112         add    a2, v3, v7
 113         mov    a4, a2, lsr #11
 114         bic    a4, a4, #0x1f0000
 115         add    a2, v4, fp
 116         mov    a2, a2, lsr #11
 117         add    a4, a4, a2, lsl #16
 118         strd   a3, a4, [a1]
 119
 120         sub    a2, v4, fp
 121         mov    a3, a2, lsr #11
 122         bic    a3, a3, #0x1f0000
 123         sub    a2, v3, v7
 124         mov    a2, a2, lsr #11
 125         add    a3, a3, a2, lsl #16
 126         add    a2, v2, v6
 127         mov    a4, a2, lsr #11
 128         bic    a4, a4, #0x1f0000
 129         sub    a2, v1, v5
 130         mov    a2, a2, lsr #11
 131         add    a4, a4, a2, lsl #16
 132         strd   a3, a4, [a1, #8]
 133
 134         ldr    pc, [sp], #4
 135
 136 row_dc_only:
 137         orr    a3, a3, a3, lsl #16
 138         bic    a3, a3, #0xe000
 139         mov    a3, a3, lsl #3
 140         mov    a4, a3
 141         strd   a3, a4, [a1]
 142         strd   a3, a4, [a1, #8]
 143
 144         ldr    pc, [sp], #4
 145 endfunc
 146
 147         .macro idct_col
 148         ldr    a4, [a1]              /* a4 = col[1:0] */
 149         mov    ip, #16384
 150         sub    ip, ip, #1            /* ip = W4 */
 151 #if 0
 152         mov    v1, #(1<<(COL_SHIFT-1))
 153         smlabt v2, ip, a4, v1        /* v2 = W4*col[1] + (1<<(COL_SHIFT-1)) */
 154         smlabb v1, ip, a4, v1        /* v1 = W4*col[0] + (1<<(COL_SHIFT-1)) */
 155         ldr    a4, [a1, #(16*4)]
 156 #else
 157         mov    v1, #((1<<(COL_SHIFT-1))/W4) /* this matches the C version */
 158         add    v2, v1, a4, asr #16
 159         rsb    v2, v2, v2, lsl #14
 160         mov    a4, a4, lsl #16
 161         add    v1, v1, a4, asr #16
 162         ldr    a4, [a1, #(16*4)]
 163         rsb    v1, v1, v1, lsl #14
 164 #endif
 165
 166         smulbb lr, ip, a4
 167         smulbt a3, ip, a4
 168         sub    v3, v1, lr
 169         sub    v5, v1, lr
 170         add    v7, v1, lr
 171         add    v1, v1, lr
 172         sub    v4, v2, a3
 173         sub    v6, v2, a3
 174         add    fp, v2, a3
 175         ldr    ip, =W26
 176         ldr    a4, [a1, #(16*2)]
 177         add    v2, v2, a3
 178
 179         smulbb lr, ip, a4
 180         smultb a3, ip, a4
 181         add    v1, v1, lr
 182         sub    v7, v7, lr
 183         add    v3, v3, a3
 184         sub    v5, v5, a3
 185         smulbt lr, ip, a4
 186         smultt a3, ip, a4
 187         add    v2, v2, lr
 188         sub    fp, fp, lr
 189         add    v4, v4, a3
 190         ldr    a4, [a1, #(16*6)]
 191         sub    v6, v6, a3
 192
 193         smultb lr, ip, a4
 194         smulbb a3, ip, a4
 195         add    v1, v1, lr
 196         sub    v7, v7, lr
 197         sub    v3, v3, a3
 198         add    v5, v5, a3
 199         smultt lr, ip, a4
 200         smulbt a3, ip, a4
 201         add    v2, v2, lr
 202         sub    fp, fp, lr
 203         sub    v4, v4, a3
 204         add    v6, v6, a3
 205
 206         stmfd  sp!, {v1, v2, v3, v4, v5, v6, v7, fp}
 207
 208         ldr    ip, =W13
 209         ldr    a4, [a1, #(16*1)]
 210         ldr    lr, =W57
 211         smulbb v1, ip, a4
 212         smultb v3, ip, a4
 213         smulbb v5, lr, a4
 214         smultb v7, lr, a4
 215         smulbt v2, ip, a4
 216         smultt v4, ip, a4
 217         smulbt v6, lr, a4
 218         smultt fp, lr, a4
 219         rsb    v4, v4, #0
 220         ldr    a4, [a1, #(16*3)]
 221         rsb    v3, v3, #0
 222
 223         smlatb v1, ip, a4, v1
 224         smlatb v3, lr, a4, v3
 225         smulbb a3, ip, a4
 226         smulbb a2, lr, a4
 227         sub    v5, v5, a3
 228         sub    v7, v7, a2
 229         smlatt v2, ip, a4, v2
 230         smlatt v4, lr, a4, v4
 231         smulbt a3, ip, a4
 232         smulbt a2, lr, a4
 233         sub    v6, v6, a3
 234         ldr    a4, [a1, #(16*5)]
 235         sub    fp, fp, a2
 236
 237         smlabb v1, lr, a4, v1
 238         smlabb v3, ip, a4, v3
 239         smlatb v5, lr, a4, v5
 240         smlatb v7, ip, a4, v7
 241         smlabt v2, lr, a4, v2
 242         smlabt v4, ip, a4, v4
 243         smlatt v6, lr, a4, v6
 244         ldr    a3, [a1, #(16*7)]
 245         smlatt fp, ip, a4, fp
 246
 247         smlatb v1, lr, a3, v1
 248         smlabb v3, lr, a3, v3
 249         smlatb v5, ip, a3, v5
 250         smulbb a4, ip, a3
 251         smlatt v2, lr, a3, v2
 252         sub    v7, v7, a4
 253         smlabt v4, lr, a3, v4
 254         smulbt a4, ip, a3
 255         smlatt v6, ip, a3, v6
 256         sub    fp, fp, a4
 257         .endm
 258
 259 function idct_col_armv5te
 260         str    lr, [sp, #-4]!
 261
 262         idct_col
 263
 264         ldmfd  sp!, {a3, a4}
 265         adds   a2, a3, v1
 266         mov    a2, a2, lsr #20
 267         it     mi
 268         orrmi  a2, a2, #0xf000
 269         add    ip, a4, v2
 270         mov    ip, ip, asr #20
 271         orr    a2, a2, ip, lsl #16
 272         str    a2, [a1]
 273         subs   a3, a3, v1
 274         mov    a2, a3, lsr #20
 275         it     mi
 276         orrmi  a2, a2, #0xf000
 277         sub    a4, a4, v2
 278         mov    a4, a4, asr #20
 279         orr    a2, a2, a4, lsl #16
 280         ldmfd  sp!, {a3, a4}
 281         str    a2, [a1, #(16*7)]
 282
 283         subs   a2, a3, v3
 284         mov    a2, a2, lsr #20
 285         it     mi
 286         orrmi  a2, a2, #0xf000
 287         sub    ip, a4, v4
 288         mov    ip, ip, asr #20
 289         orr    a2, a2, ip, lsl #16
 290         str    a2, [a1, #(16*1)]
 291         adds   a3, a3, v3
 292         mov    a2, a3, lsr #20
 293         it     mi
 294         orrmi  a2, a2, #0xf000
 295         add    a4, a4, v4
 296         mov    a4, a4, asr #20
 297         orr    a2, a2, a4, lsl #16
 298         ldmfd  sp!, {a3, a4}
 299         str    a2, [a1, #(16*6)]
 300
 301         adds   a2, a3, v5
 302         mov    a2, a2, lsr #20
 303         it     mi
 304         orrmi  a2, a2, #0xf000
 305         add    ip, a4, v6
 306         mov    ip, ip, asr #20
 307         orr    a2, a2, ip, lsl #16
 308         str    a2, [a1, #(16*2)]
 309         subs   a3, a3, v5
 310         mov    a2, a3, lsr #20
 311         it     mi
 312         orrmi  a2, a2, #0xf000
 313         sub    a4, a4, v6
 314         mov    a4, a4, asr #20
 315         orr    a2, a2, a4, lsl #16
 316         ldmfd  sp!, {a3, a4}
 317         str    a2, [a1, #(16*5)]
 318
 319         adds   a2, a3, v7
 320         mov    a2, a2, lsr #20
 321         it     mi
 322         orrmi  a2, a2, #0xf000
 323         add    ip, a4, fp
 324         mov    ip, ip, asr #20
 325         orr    a2, a2, ip, lsl #16
 326         str    a2, [a1, #(16*3)]
 327         subs   a3, a3, v7
 328         mov    a2, a3, lsr #20
 329         it     mi
 330         orrmi  a2, a2, #0xf000
 331         sub    a4, a4, fp
 332         mov    a4, a4, asr #20
 333         orr    a2, a2, a4, lsl #16
 334         str    a2, [a1, #(16*4)]
 335
 336         ldr    pc, [sp], #4
 337 endfunc
 338
 339 .macro  clip   dst, src:vararg
 340         movs   \dst, \src
 341         it     mi
 342         movmi  \dst, #0
 343         cmp    \dst, #255
 344         it     gt
 345         movgt  \dst, #255
 346 .endm
 347
 348 .macro  aclip  dst, src:vararg
 349         adds   \dst, \src
 350         it     mi
 351         movmi  \dst, #0
 352         cmp    \dst, #255
 353         it     gt
 354         movgt  \dst, #255
 355 .endm
 356
 357 function idct_col_put_armv5te
 358         str    lr, [sp, #-4]!
 359
 360         idct_col
 361
 362         ldmfd  sp!, {a3, a4}
 363         ldr    lr, [sp, #32]
 364         add    a2, a3, v1
 365         clip   a2, a2, asr #20
 366         add    ip, a4, v2
 367         clip   ip, ip, asr #20
 368         orr    a2, a2, ip, lsl #8
 369         sub    a3, a3, v1
 370         clip   a3, a3, asr #20
 371         sub    a4, a4, v2
 372         clip   a4, a4, asr #20
 373         ldr    v1, [sp, #28]
 374         strh   a2, [v1]
 375         add    a2, v1, #2
 376         str    a2, [sp, #28]
 377         orr    a2, a3, a4, lsl #8
 378         rsb    v2, lr, lr, lsl #3
 379         ldmfd  sp!, {a3, a4}
 380         strh_pre a2, v2, v1
 381
 382         sub    a2, a3, v3
 383         clip   a2, a2, asr #20
 384         sub    ip, a4, v4
 385         clip   ip, ip, asr #20
 386         orr    a2, a2, ip, lsl #8
 387         strh_pre a2, v1, lr
 388         add    a3, a3, v3
 389         clip   a2, a3, asr #20
 390         add    a4, a4, v4
 391         clip   a4, a4, asr #20
 392         orr    a2, a2, a4, lsl #8
 393         ldmfd  sp!, {a3, a4}
 394         strh_dpre a2, v2, lr
 395
 396         add    a2, a3, v5
 397         clip   a2, a2, asr #20
 398         add    ip, a4, v6
 399         clip   ip, ip, asr #20
 400         orr    a2, a2, ip, lsl #8
 401         strh_pre a2, v1, lr
 402         sub    a3, a3, v5
 403         clip   a2, a3, asr #20
 404         sub    a4, a4, v6
 405         clip   a4, a4, asr #20
 406         orr    a2, a2, a4, lsl #8
 407         ldmfd  sp!, {a3, a4}
 408         strh_dpre a2, v2, lr
 409
 410         add    a2, a3, v7
 411         clip   a2, a2, asr #20
 412         add    ip, a4, fp
 413         clip   ip, ip, asr #20
 414         orr    a2, a2, ip, lsl #8
 415         strh   a2, [v1, lr]
 416         sub    a3, a3, v7
 417         clip   a2, a3, asr #20
 418         sub    a4, a4, fp
 419         clip   a4, a4, asr #20
 420         orr    a2, a2, a4, lsl #8
 421         strh_dpre a2, v2, lr
 422
 423         ldr    pc, [sp], #4
 424 endfunc
 425
 426 function idct_col_add_armv5te
 427         str    lr, [sp, #-4]!
 428
 429         idct_col
 430
 431         ldr    lr, [sp, #36]
 432
 433         ldmfd  sp!, {a3, a4}
 434         ldrh   ip, [lr]
 435         add    a2, a3, v1
 436         sub    a3, a3, v1
 437         and    v1, ip, #255
 438         aclip  a2, v1, a2, asr #20
 439         add    v1, a4, v2
 440         mov    v1, v1, asr #20
 441         aclip  v1, v1, ip, lsr #8
 442         orr    a2, a2, v1, lsl #8
 443         ldr    v1, [sp, #32]
 444         sub    a4, a4, v2
 445         rsb    v2, v1, v1, lsl #3
 446         ldrh_pre ip, v2, lr
 447         strh   a2, [lr]
 448         and    a2, ip, #255
 449         aclip  a3, a2, a3, asr #20
 450         mov    a4, a4, asr #20
 451         aclip  a4, a4, ip, lsr #8
 452         add    a2, lr, #2
 453         str    a2, [sp, #28]
 454         orr    a2, a3, a4, lsl #8
 455         strh   a2, [v2]
 456
 457         ldmfd  sp!, {a3, a4}
 458         ldrh_pre ip, lr, v1
 459         sub    a2, a3, v3
 460         add    a3, a3, v3
 461         and    v3, ip, #255
 462         aclip  a2, v3, a2, asr #20
 463         sub    v3, a4, v4
 464         mov    v3, v3, asr #20
 465         aclip  v3, v3, ip, lsr #8
 466         orr    a2, a2, v3, lsl #8
 467         add    a4, a4, v4
 468         ldrh_dpre ip, v2, v1
 469         strh   a2, [lr]
 470         and    a2, ip, #255
 471         aclip  a3, a2, a3, asr #20
 472         mov    a4, a4, asr #20
 473         aclip  a4, a4, ip, lsr #8
 474         orr    a2, a3, a4, lsl #8
 475         strh   a2, [v2]
 476
 477         ldmfd  sp!, {a3, a4}
 478         ldrh_pre ip, lr, v1
 479         add    a2, a3, v5
 480         sub    a3, a3, v5
 481         and    v3, ip, #255
 482         aclip  a2, v3, a2, asr #20
 483         add    v3, a4, v6
 484         mov    v3, v3, asr #20
 485         aclip  v3, v3, ip, lsr #8
 486         orr    a2, a2, v3, lsl #8
 487         sub    a4, a4, v6
 488         ldrh_dpre ip, v2, v1
 489         strh   a2, [lr]
 490         and    a2, ip, #255
 491         aclip  a3, a2, a3, asr #20
 492         mov    a4, a4, asr #20
 493         aclip  a4, a4, ip, lsr #8
 494         orr    a2, a3, a4, lsl #8
 495         strh   a2, [v2]
 496
 497         ldmfd  sp!, {a3, a4}
 498         ldrh_pre ip, lr, v1
 499         add    a2, a3, v7
 500         sub    a3, a3, v7
 501         and    v3, ip, #255
 502         aclip  a2, v3, a2, asr #20
 503         add    v3, a4, fp
 504         mov    v3, v3, asr #20
 505         aclip  v3, v3, ip, lsr #8
 506         orr    a2, a2, v3, lsl #8
 507         sub    a4, a4, fp
 508         ldrh_dpre ip, v2, v1
 509         strh   a2, [lr]
 510         and    a2, ip, #255
 511         aclip  a3, a2, a3, asr #20
 512         mov    a4, a4, asr #20
 513         aclip  a4, a4, ip, lsr #8
 514         orr    a2, a3, a4, lsl #8
 515         strh   a2, [v2]
 516
 517         ldr    pc, [sp], #4
 518 endfunc
 519
 520 function ff_simple_idct_armv5te, export=1
 521         stmfd  sp!, {v1, v2, v3, v4, v5, v6, v7, fp, lr}
 522
 523         bl     idct_row_armv5te
 524         add    a1, a1, #16
 525         bl     idct_row_armv5te
 526         add    a1, a1, #16
 527         bl     idct_row_armv5te
 528         add    a1, a1, #16
 529         bl     idct_row_armv5te
 530         add    a1, a1, #16
 531         bl     idct_row_armv5te
 532         add    a1, a1, #16
 533         bl     idct_row_armv5te
 534         add    a1, a1, #16
 535         bl     idct_row_armv5te
 536         add    a1, a1, #16
 537         bl     idct_row_armv5te
 538
 539         sub    a1, a1, #(16*7)
 540
 541         bl     idct_col_armv5te
 542         add    a1, a1, #4
 543         bl     idct_col_armv5te
 544         add    a1, a1, #4
 545         bl     idct_col_armv5te
 546         add    a1, a1, #4
 547         bl     idct_col_armv5te
 548
 549         ldmfd  sp!, {v1, v2, v3, v4, v5, v6, v7, fp, pc}
 550 endfunc
 551
 552 function ff_simple_idct_add_armv5te, export=1
 553         stmfd  sp!, {a1, a2, v1, v2, v3, v4, v5, v6, v7, fp, lr}
 554
 555         mov    a1, a3
 556
 557         bl     idct_row_armv5te
 558         add    a1, a1, #16
 559         bl     idct_row_armv5te
 560         add    a1, a1, #16
 561         bl     idct_row_armv5te
 562         add    a1, a1, #16
 563         bl     idct_row_armv5te
 564         add    a1, a1, #16
 565         bl     idct_row_armv5te
 566         add    a1, a1, #16
 567         bl     idct_row_armv5te
 568         add    a1, a1, #16
 569         bl     idct_row_armv5te
 570         add    a1, a1, #16
 571         bl     idct_row_armv5te
 572
 573         sub    a1, a1, #(16*7)
 574
 575         bl     idct_col_add_armv5te
 576         add    a1, a1, #4
 577         bl     idct_col_add_armv5te
 578         add    a1, a1, #4
 579         bl     idct_col_add_armv5te
 580         add    a1, a1, #4
 581         bl     idct_col_add_armv5te
 582
 583         add    sp, sp, #8
 584         ldmfd  sp!, {v1, v2, v3, v4, v5, v6, v7, fp, pc}
 585 endfunc
 586
 587 function ff_simple_idct_put_armv5te, export=1
 588         stmfd  sp!, {a1, a2, v1, v2, v3, v4, v5, v6, v7, fp, lr}
 589
 590         mov    a1, a3
 591
 592         bl     idct_row_armv5te
 593         add    a1, a1, #16
 594         bl     idct_row_armv5te
 595         add    a1, a1, #16
 596         bl     idct_row_armv5te
 597         add    a1, a1, #16
 598         bl     idct_row_armv5te
 599         add    a1, a1, #16
 600         bl     idct_row_armv5te
 601         add    a1, a1, #16
 602         bl     idct_row_armv5te
 603         add    a1, a1, #16
 604         bl     idct_row_armv5te
 605         add    a1, a1, #16
 606         bl     idct_row_armv5te
 607
 608         sub    a1, a1, #(16*7)
 609
 610         bl     idct_col_put_armv5te
 611         add    a1, a1, #4
 612         bl     idct_col_put_armv5te
 613         add    a1, a1, #4
 614         bl     idct_col_put_armv5te
 615         add    a1, a1, #4
 616         bl     idct_col_put_armv5te
 617
 618         add    sp, sp, #8
 619         ldmfd  sp!, {v1, v2, v3, v4, v5, v6, v7, fp, pc}
 620 endfunc