libavcodec/ppc/fdct_altivec.c

   1 /*
   2  * Copyright (C) 2003  James Klicman <james@klicman.org>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "config.h"
  22 #if HAVE_ALTIVEC_H
  23 #include <altivec.h>
  24 #endif
  25 #include "libavutil/common.h"
  26 #include "libavcodec/dsputil.h"
  27 #include "dsputil_ppc.h"
  28
  29
  30 #define vs16(v) ((vector signed short)(v))
  31 #define vs32(v) ((vector signed int)(v))
  32 #define vu8(v)  ((vector unsigned char)(v))
  33 #define vu16(v) ((vector unsigned short)(v))
  34 #define vu32(v) ((vector unsigned int)(v))
  35
  36
  37 #define C1     0.98078525066375732421875000 /* cos(1*PI/16) */
  38 #define C2     0.92387950420379638671875000 /* cos(2*PI/16) */
  39 #define C3     0.83146959543228149414062500 /* cos(3*PI/16) */
  40 #define C4     0.70710676908493041992187500 /* cos(4*PI/16) */
  41 #define C5     0.55557024478912353515625000 /* cos(5*PI/16) */
  42 #define C6     0.38268342614173889160156250 /* cos(6*PI/16) */
  43 #define C7     0.19509032368659973144531250 /* cos(7*PI/16) */
  44 #define SQRT_2 1.41421353816986083984375000 /* sqrt(2)      */
  45
  46
  47 #define W0 -(2 * C2)
  48 #define W1 (2 * C6)
  49 #define W2 (SQRT_2 * C6)
  50 #define W3 (SQRT_2 * C3)
  51 #define W4 (SQRT_2 * (-C1 + C3 + C5 - C7))
  52 #define W5 (SQRT_2 * ( C1 + C3 - C5 + C7))
  53 #define W6 (SQRT_2 * ( C1 + C3 + C5 - C7))
  54 #define W7 (SQRT_2 * ( C1 + C3 - C5 - C7))
  55 #define W8 (SQRT_2 * ( C7 - C3))
  56 #define W9 (SQRT_2 * (-C1 - C3))
  57 #define WA (SQRT_2 * (-C3 - C5))
  58 #define WB (SQRT_2 * ( C5 - C3))
  59
  60
  61 static vector float fdctconsts[3] = {
  62     { W0, W1, W2, W3 },
  63     { W4, W5, W6, W7 },
  64     { W8, W9, WA, WB }
  65 };
  66
  67 #define LD_W0 vec_splat(cnsts0, 0)
  68 #define LD_W1 vec_splat(cnsts0, 1)
  69 #define LD_W2 vec_splat(cnsts0, 2)
  70 #define LD_W3 vec_splat(cnsts0, 3)
  71 #define LD_W4 vec_splat(cnsts1, 0)
  72 #define LD_W5 vec_splat(cnsts1, 1)
  73 #define LD_W6 vec_splat(cnsts1, 2)
  74 #define LD_W7 vec_splat(cnsts1, 3)
  75 #define LD_W8 vec_splat(cnsts2, 0)
  76 #define LD_W9 vec_splat(cnsts2, 1)
  77 #define LD_WA vec_splat(cnsts2, 2)
  78 #define LD_WB vec_splat(cnsts2, 3)
  79
  80
  81 #define FDCTROW(b0,b1,b2,b3,b4,b5,b6,b7) /* {{{ */                  \
  82     x0 = vec_add(b0, b7);               /* x0 = b0 + b7; */         \
  83     x7 = vec_sub(b0, b7);               /* x7 = b0 - b7; */         \
  84     x1 = vec_add(b1, b6);               /* x1 = b1 + b6; */         \
  85     x6 = vec_sub(b1, b6);               /* x6 = b1 - b6; */         \
  86     x2 = vec_add(b2, b5);               /* x2 = b2 + b5; */         \
  87     x5 = vec_sub(b2, b5);               /* x5 = b2 - b5; */         \
  88     x3 = vec_add(b3, b4);               /* x3 = b3 + b4; */         \
  89     x4 = vec_sub(b3, b4);               /* x4 = b3 - b4; */         \
  90                                                                     \
  91     b7 = vec_add(x0, x3);               /* b7 = x0 + x3; */         \
  92     b1 = vec_add(x1, x2);               /* b1 = x1 + x2; */         \
  93     b0 = vec_add(b7, b1);               /* b0 = b7 + b1; */         \
  94     b4 = vec_sub(b7, b1);               /* b4 = b7 - b1; */         \
  95                                                                     \
  96     b2 = vec_sub(x0, x3);               /* b2 = x0 - x3; */         \
  97     b6 = vec_sub(x1, x2);               /* b6 = x1 - x2; */         \
  98     b5 = vec_add(b6, b2);               /* b5 = b6 + b2; */         \
  99     cnst = LD_W2;                                                   \
 100     b5 = vec_madd(cnst, b5, mzero);     /* b5 = b5 * W2; */         \
 101     cnst = LD_W1;                                                   \
 102     b2 = vec_madd(cnst, b2, b5);        /* b2 = b5 + b2 * W1; */    \
 103     cnst = LD_W0;                                                   \
 104     b6 = vec_madd(cnst, b6, b5);        /* b6 = b5 + b6 * W0; */    \
 105                                                                     \
 106     x0 = vec_add(x4, x7);               /* x0 = x4 + x7; */         \
 107     x1 = vec_add(x5, x6);               /* x1 = x5 + x6; */         \
 108     x2 = vec_add(x4, x6);               /* x2 = x4 + x6; */         \
 109     x3 = vec_add(x5, x7);               /* x3 = x5 + x7; */         \
 110     x8 = vec_add(x2, x3);               /* x8 = x2 + x3; */         \
 111     cnst = LD_W3;                                                   \
 112     x8 = vec_madd(cnst, x8, mzero);     /* x8 = x8 * W3; */         \
 113                                                                     \
 114     cnst = LD_W8;                                                   \
 115     x0 = vec_madd(cnst, x0, mzero);     /* x0 *= W8; */             \
 116     cnst = LD_W9;                                                   \
 117     x1 = vec_madd(cnst, x1, mzero);     /* x1 *= W9; */             \
 118     cnst = LD_WA;                                                   \
 119     x2 = vec_madd(cnst, x2, x8);        /* x2 = x2 * WA + x8; */    \
 120     cnst = LD_WB;                                                   \
 121     x3 = vec_madd(cnst, x3, x8);        /* x3 = x3 * WB + x8; */    \
 122                                                                     \
 123     cnst = LD_W4;                                                   \
 124     b7 = vec_madd(cnst, x4, x0);        /* b7 = x4 * W4 + x0; */    \
 125     cnst = LD_W5;                                                   \
 126     b5 = vec_madd(cnst, x5, x1);        /* b5 = x5 * W5 + x1; */    \
 127     cnst = LD_W6;                                                   \
 128     b3 = vec_madd(cnst, x6, x1);        /* b3 = x6 * W6 + x1; */    \
 129     cnst = LD_W7;                                                   \
 130     b1 = vec_madd(cnst, x7, x0);        /* b1 = x7 * W7 + x0; */    \
 131                                                                     \
 132     b7 = vec_add(b7, x2);               /* b7 = b7 + x2; */         \
 133     b5 = vec_add(b5, x3);               /* b5 = b5 + x3; */         \
 134     b3 = vec_add(b3, x2);               /* b3 = b3 + x2; */         \
 135     b1 = vec_add(b1, x3);               /* b1 = b1 + x3; */         \
 136     /* }}} */
 137
 138 #define FDCTCOL(b0,b1,b2,b3,b4,b5,b6,b7) /* {{{ */                  \
 139     x0 = vec_add(b0, b7);               /* x0 = b0 + b7; */         \
 140     x7 = vec_sub(b0, b7);               /* x7 = b0 - b7; */         \
 141     x1 = vec_add(b1, b6);               /* x1 = b1 + b6; */         \
 142     x6 = vec_sub(b1, b6);               /* x6 = b1 - b6; */         \
 143     x2 = vec_add(b2, b5);               /* x2 = b2 + b5; */         \
 144     x5 = vec_sub(b2, b5);               /* x5 = b2 - b5; */         \
 145     x3 = vec_add(b3, b4);               /* x3 = b3 + b4; */         \
 146     x4 = vec_sub(b3, b4);               /* x4 = b3 - b4; */         \
 147                                                                     \
 148     b7 = vec_add(x0, x3);               /* b7 = x0 + x3; */         \
 149     b1 = vec_add(x1, x2);               /* b1 = x1 + x2; */         \
 150     b0 = vec_add(b7, b1);               /* b0 = b7 + b1; */         \
 151     b4 = vec_sub(b7, b1);               /* b4 = b7 - b1; */         \
 152                                                                     \
 153     b2 = vec_sub(x0, x3);               /* b2 = x0 - x3; */         \
 154     b6 = vec_sub(x1, x2);               /* b6 = x1 - x2; */         \
 155     b5 = vec_add(b6, b2);               /* b5 = b6 + b2; */         \
 156     cnst = LD_W2;                                                   \
 157     b5 = vec_madd(cnst, b5, mzero);     /* b5 = b5 * W2; */         \
 158     cnst = LD_W1;                                                   \
 159     b2 = vec_madd(cnst, b2, b5);        /* b2 = b5 + b2 * W1; */    \
 160     cnst = LD_W0;                                                   \
 161     b6 = vec_madd(cnst, b6, b5);        /* b6 = b5 + b6 * W0; */    \
 162                                                                     \
 163     x0 = vec_add(x4, x7);               /* x0 = x4 + x7; */         \
 164     x1 = vec_add(x5, x6);               /* x1 = x5 + x6; */         \
 165     x2 = vec_add(x4, x6);               /* x2 = x4 + x6; */         \
 166     x3 = vec_add(x5, x7);               /* x3 = x5 + x7; */         \
 167     x8 = vec_add(x2, x3);               /* x8 = x2 + x3; */         \
 168     cnst = LD_W3;                                                   \
 169     x8 = vec_madd(cnst, x8, mzero);     /* x8 = x8 * W3; */         \
 170                                                                     \
 171     cnst = LD_W8;                                                   \
 172     x0 = vec_madd(cnst, x0, mzero);     /* x0 *= W8; */             \
 173     cnst = LD_W9;                                                   \
 174     x1 = vec_madd(cnst, x1, mzero);     /* x1 *= W9; */             \
 175     cnst = LD_WA;                                                   \
 176     x2 = vec_madd(cnst, x2, x8);        /* x2 = x2 * WA + x8; */    \
 177     cnst = LD_WB;                                                   \
 178     x3 = vec_madd(cnst, x3, x8);        /* x3 = x3 * WB + x8; */    \
 179                                                                     \
 180     cnst = LD_W4;                                                   \
 181     b7 = vec_madd(cnst, x4, x0);        /* b7 = x4 * W4 + x0; */    \
 182     cnst = LD_W5;                                                   \
 183     b5 = vec_madd(cnst, x5, x1);        /* b5 = x5 * W5 + x1; */    \
 184     cnst = LD_W6;                                                   \
 185     b3 = vec_madd(cnst, x6, x1);        /* b3 = x6 * W6 + x1; */    \
 186     cnst = LD_W7;                                                   \
 187     b1 = vec_madd(cnst, x7, x0);        /* b1 = x7 * W7 + x0; */    \
 188                                                                     \
 189     b7 = vec_add(b7, x2);               /* b7 += x2; */             \
 190     b5 = vec_add(b5, x3);               /* b5 += x3; */             \
 191     b3 = vec_add(b3, x2);               /* b3 += x2; */             \
 192     b1 = vec_add(b1, x3);               /* b1 += x3; */             \
 193     /* }}} */
 194
 195
 196
 197 /* two dimensional discrete cosine transform */
 198
 199 void fdct_altivec(int16_t *block)
 200 {
 201 POWERPC_PERF_DECLARE(altivec_fdct, 1);
 202     vector signed short *bp;
 203     vector float *cp;
 204     vector float b00, b10, b20, b30, b40, b50, b60, b70;
 205     vector float b01, b11, b21, b31, b41, b51, b61, b71;
 206     vector float mzero, cnst, cnsts0, cnsts1, cnsts2;
 207     vector float x0, x1, x2, x3, x4, x5, x6, x7, x8;
 208
 209     POWERPC_PERF_START_COUNT(altivec_fdct, 1);
 210
 211
 212     /* setup constants {{{ */
 213     /* mzero = -0.0 */
 214     mzero = ((vector float)vec_splat_u32(-1));
 215     mzero = ((vector float)vec_sl(vu32(mzero), vu32(mzero)));
 216     cp = fdctconsts;
 217     cnsts0 = vec_ld(0, cp); cp++;
 218     cnsts1 = vec_ld(0, cp); cp++;
 219     cnsts2 = vec_ld(0, cp);
 220     /* }}} */
 221
 222
 223     /* 8x8 matrix transpose (vector short[8]) {{{ */
 224 #define MERGE_S16(hl,a,b) vec_merge##hl(vs16(a), vs16(b))
 225
 226     bp = (vector signed short*)block;
 227     b00 = ((vector float)vec_ld(0,    bp));
 228     b40 = ((vector float)vec_ld(16*4, bp));
 229     b01 = ((vector float)MERGE_S16(h, b00, b40));
 230     b11 = ((vector float)MERGE_S16(l, b00, b40));
 231     bp++;
 232     b10 = ((vector float)vec_ld(0,    bp));
 233     b50 = ((vector float)vec_ld(16*4, bp));
 234     b21 = ((vector float)MERGE_S16(h, b10, b50));
 235     b31 = ((vector float)MERGE_S16(l, b10, b50));
 236     bp++;
 237     b20 = ((vector float)vec_ld(0,    bp));
 238     b60 = ((vector float)vec_ld(16*4, bp));
 239     b41 = ((vector float)MERGE_S16(h, b20, b60));
 240     b51 = ((vector float)MERGE_S16(l, b20, b60));
 241     bp++;
 242     b30 = ((vector float)vec_ld(0,    bp));
 243     b70 = ((vector float)vec_ld(16*4, bp));
 244     b61 = ((vector float)MERGE_S16(h, b30, b70));
 245     b71 = ((vector float)MERGE_S16(l, b30, b70));
 246
 247     x0 = ((vector float)MERGE_S16(h, b01, b41));
 248     x1 = ((vector float)MERGE_S16(l, b01, b41));
 249     x2 = ((vector float)MERGE_S16(h, b11, b51));
 250     x3 = ((vector float)MERGE_S16(l, b11, b51));
 251     x4 = ((vector float)MERGE_S16(h, b21, b61));
 252     x5 = ((vector float)MERGE_S16(l, b21, b61));
 253     x6 = ((vector float)MERGE_S16(h, b31, b71));
 254     x7 = ((vector float)MERGE_S16(l, b31, b71));
 255
 256     b00 = ((vector float)MERGE_S16(h, x0, x4));
 257     b10 = ((vector float)MERGE_S16(l, x0, x4));
 258     b20 = ((vector float)MERGE_S16(h, x1, x5));
 259     b30 = ((vector float)MERGE_S16(l, x1, x5));
 260     b40 = ((vector float)MERGE_S16(h, x2, x6));
 261     b50 = ((vector float)MERGE_S16(l, x2, x6));
 262     b60 = ((vector float)MERGE_S16(h, x3, x7));
 263     b70 = ((vector float)MERGE_S16(l, x3, x7));
 264
 265 #undef MERGE_S16
 266     /* }}} */
 267
 268
 269 /* Some of the initial calculations can be done as vector short before
 270  * conversion to vector float.  The following code section takes advantage
 271  * of this.
 272  */
 273 #if 1
 274     /* fdct rows {{{ */
 275     x0 = ((vector float)vec_add(vs16(b00), vs16(b70)));
 276     x7 = ((vector float)vec_sub(vs16(b00), vs16(b70)));
 277     x1 = ((vector float)vec_add(vs16(b10), vs16(b60)));
 278     x6 = ((vector float)vec_sub(vs16(b10), vs16(b60)));
 279     x2 = ((vector float)vec_add(vs16(b20), vs16(b50)));
 280     x5 = ((vector float)vec_sub(vs16(b20), vs16(b50)));
 281     x3 = ((vector float)vec_add(vs16(b30), vs16(b40)));
 282     x4 = ((vector float)vec_sub(vs16(b30), vs16(b40)));
 283
 284     b70 = ((vector float)vec_add(vs16(x0), vs16(x3)));
 285     b10 = ((vector float)vec_add(vs16(x1), vs16(x2)));
 286
 287     b00 = ((vector float)vec_add(vs16(b70), vs16(b10)));
 288     b40 = ((vector float)vec_sub(vs16(b70), vs16(b10)));
 289
 290 #define CTF0(n) \
 291     b##n##1 = ((vector float)vec_unpackl(vs16(b##n##0))); \
 292     b##n##0 = ((vector float)vec_unpackh(vs16(b##n##0))); \
 293     b##n##1 = vec_ctf(vs32(b##n##1), 0); \
 294     b##n##0 = vec_ctf(vs32(b##n##0), 0);
 295
 296     CTF0(0);
 297     CTF0(4);
 298
 299     b20 = ((vector float)vec_sub(vs16(x0), vs16(x3)));
 300     b60 = ((vector float)vec_sub(vs16(x1), vs16(x2)));
 301
 302     CTF0(2);
 303     CTF0(6);
 304
 305 #undef CTF0
 306
 307     x0 = vec_add(b60, b20);
 308     x1 = vec_add(b61, b21);
 309
 310     cnst = LD_W2;
 311     x0 = vec_madd(cnst, x0, mzero);
 312     x1 = vec_madd(cnst, x1, mzero);
 313     cnst = LD_W1;
 314     b20 = vec_madd(cnst, b20, x0);
 315     b21 = vec_madd(cnst, b21, x1);
 316     cnst = LD_W0;
 317     b60 = vec_madd(cnst, b60, x0);
 318     b61 = vec_madd(cnst, b61, x1);
 319
 320 #define CTFX(x,b) \
 321     b##0 = ((vector float)vec_unpackh(vs16(x))); \
 322     b##1 = ((vector float)vec_unpackl(vs16(x))); \
 323     b##0 = vec_ctf(vs32(b##0), 0); \
 324     b##1 = vec_ctf(vs32(b##1), 0); \
 325
 326     CTFX(x4, b7);
 327     CTFX(x5, b5);
 328     CTFX(x6, b3);
 329     CTFX(x7, b1);
 330
 331 #undef CTFX
 332
 333
 334     x0 = vec_add(b70, b10);
 335     x1 = vec_add(b50, b30);
 336     x2 = vec_add(b70, b30);
 337     x3 = vec_add(b50, b10);
 338     x8 = vec_add(x2, x3);
 339     cnst = LD_W3;
 340     x8 = vec_madd(cnst, x8, mzero);
 341
 342     cnst = LD_W8;
 343     x0 = vec_madd(cnst, x0, mzero);
 344     cnst = LD_W9;
 345     x1 = vec_madd(cnst, x1, mzero);
 346     cnst = LD_WA;
 347     x2 = vec_madd(cnst, x2, x8);
 348     cnst = LD_WB;
 349     x3 = vec_madd(cnst, x3, x8);
 350
 351     cnst = LD_W4;
 352     b70 = vec_madd(cnst, b70, x0);
 353     cnst = LD_W5;
 354     b50 = vec_madd(cnst, b50, x1);
 355     cnst = LD_W6;
 356     b30 = vec_madd(cnst, b30, x1);
 357     cnst = LD_W7;
 358     b10 = vec_madd(cnst, b10, x0);
 359
 360     b70 = vec_add(b70, x2);
 361     b50 = vec_add(b50, x3);
 362     b30 = vec_add(b30, x2);
 363     b10 = vec_add(b10, x3);
 364
 365
 366     x0 = vec_add(b71, b11);
 367     x1 = vec_add(b51, b31);
 368     x2 = vec_add(b71, b31);
 369     x3 = vec_add(b51, b11);
 370     x8 = vec_add(x2, x3);
 371     cnst = LD_W3;
 372     x8 = vec_madd(cnst, x8, mzero);
 373
 374     cnst = LD_W8;
 375     x0 = vec_madd(cnst, x0, mzero);
 376     cnst = LD_W9;
 377     x1 = vec_madd(cnst, x1, mzero);
 378     cnst = LD_WA;
 379     x2 = vec_madd(cnst, x2, x8);
 380     cnst = LD_WB;
 381     x3 = vec_madd(cnst, x3, x8);
 382
 383     cnst = LD_W4;
 384     b71 = vec_madd(cnst, b71, x0);
 385     cnst = LD_W5;
 386     b51 = vec_madd(cnst, b51, x1);
 387     cnst = LD_W6;
 388     b31 = vec_madd(cnst, b31, x1);
 389     cnst = LD_W7;
 390     b11 = vec_madd(cnst, b11, x0);
 391
 392     b71 = vec_add(b71, x2);
 393     b51 = vec_add(b51, x3);
 394     b31 = vec_add(b31, x2);
 395     b11 = vec_add(b11, x3);
 396     /* }}} */
 397 #else
 398     /* convert to float {{{ */
 399 #define CTF(n) \
 400     vs32(b##n##1) = vec_unpackl(vs16(b##n##0)); \
 401     vs32(b##n##0) = vec_unpackh(vs16(b##n##0)); \
 402     b##n##1 = vec_ctf(vs32(b##n##1), 0); \
 403     b##n##0 = vec_ctf(vs32(b##n##0), 0); \
 404
 405     CTF(0);
 406     CTF(1);
 407     CTF(2);
 408     CTF(3);
 409     CTF(4);
 410     CTF(5);
 411     CTF(6);
 412     CTF(7);
 413
 414 #undef CTF
 415     /* }}} */
 416
 417     FDCTROW(b00, b10, b20, b30, b40, b50, b60, b70);
 418     FDCTROW(b01, b11, b21, b31, b41, b51, b61, b71);
 419 #endif
 420
 421
 422     /* 8x8 matrix transpose (vector float[8][2]) {{{ */
 423     x0 = vec_mergel(b00, b20);
 424     x1 = vec_mergeh(b00, b20);
 425     x2 = vec_mergel(b10, b30);
 426     x3 = vec_mergeh(b10, b30);
 427
 428     b00 = vec_mergeh(x1, x3);
 429     b10 = vec_mergel(x1, x3);
 430     b20 = vec_mergeh(x0, x2);
 431     b30 = vec_mergel(x0, x2);
 432
 433     x4 = vec_mergel(b41, b61);
 434     x5 = vec_mergeh(b41, b61);
 435     x6 = vec_mergel(b51, b71);
 436     x7 = vec_mergeh(b51, b71);
 437
 438     b41 = vec_mergeh(x5, x7);
 439     b51 = vec_mergel(x5, x7);
 440     b61 = vec_mergeh(x4, x6);
 441     b71 = vec_mergel(x4, x6);
 442
 443     x0 = vec_mergel(b01, b21);
 444     x1 = vec_mergeh(b01, b21);
 445     x2 = vec_mergel(b11, b31);
 446     x3 = vec_mergeh(b11, b31);
 447
 448     x4 = vec_mergel(b40, b60);
 449     x5 = vec_mergeh(b40, b60);
 450     x6 = vec_mergel(b50, b70);
 451     x7 = vec_mergeh(b50, b70);
 452
 453     b40 = vec_mergeh(x1, x3);
 454     b50 = vec_mergel(x1, x3);
 455     b60 = vec_mergeh(x0, x2);
 456     b70 = vec_mergel(x0, x2);
 457
 458     b01 = vec_mergeh(x5, x7);
 459     b11 = vec_mergel(x5, x7);
 460     b21 = vec_mergeh(x4, x6);
 461     b31 = vec_mergel(x4, x6);
 462     /* }}} */
 463
 464
 465     FDCTCOL(b00, b10, b20, b30, b40, b50, b60, b70);
 466     FDCTCOL(b01, b11, b21, b31, b41, b51, b61, b71);
 467
 468
 469     /* round, convert back to short {{{ */
 470 #define CTS(n) \
 471     b##n##0 = vec_round(b##n##0); \
 472     b##n##1 = vec_round(b##n##1); \
 473     b##n##0 = ((vector float)vec_cts(b##n##0, 0)); \
 474     b##n##1 = ((vector float)vec_cts(b##n##1, 0)); \
 475     b##n##0 = ((vector float)vec_pack(vs32(b##n##0), vs32(b##n##1))); \
 476     vec_st(vs16(b##n##0), 0, bp);
 477
 478     bp = (vector signed short*)block;
 479     CTS(0); bp++;
 480     CTS(1); bp++;
 481     CTS(2); bp++;
 482     CTS(3); bp++;
 483     CTS(4); bp++;
 484     CTS(5); bp++;
 485     CTS(6); bp++;
 486     CTS(7);
 487
 488 #undef CTS
 489     /* }}} */
 490
 491 POWERPC_PERF_STOP_COUNT(altivec_fdct, 1);
 492 }
 493
 494 /* vim:set foldmethod=marker foldlevel=0: */