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libavcodec/ppc/dsputil_altivec.c

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00001 /*
00002  * Copyright (c) 2002 Brian Foley
00003  * Copyright (c) 2002 Dieter Shirley
00004  * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #include "config.h"
00024 #if HAVE_ALTIVEC_H
00025 #include <altivec.h>
00026 #endif
00027 #include "libavcodec/dsputil.h"
00028 #include "util_altivec.h"
00029 #include "types_altivec.h"
00030 #include "dsputil_altivec.h"
00031 
00032 static int sad16_x2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
00033 {
00034     int i;
00035     int s;
00036     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
00037     vector unsigned char *tv;
00038     vector unsigned char pix1v, pix2v, pix2iv, avgv, t5;
00039     vector unsigned int sad;
00040     vector signed int sumdiffs;
00041 
00042     s = 0;
00043     sad = (vector unsigned int)vec_splat_u32(0);
00044     for (i = 0; i < h; i++) {
00045         /* Read unaligned pixels into our vectors. The vectors are as follows:
00046            pix1v: pix1[0]-pix1[15]
00047            pix2v: pix2[0]-pix2[15]      pix2iv: pix2[1]-pix2[16] */
00048         tv = (vector unsigned char *) pix1;
00049         pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
00050 
00051         tv = (vector unsigned char *) &pix2[0];
00052         pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
00053 
00054         tv = (vector unsigned char *) &pix2[1];
00055         pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
00056 
00057         /* Calculate the average vector */
00058         avgv = vec_avg(pix2v, pix2iv);
00059 
00060         /* Calculate a sum of abs differences vector */
00061         t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
00062 
00063         /* Add each 4 pixel group together and put 4 results into sad */
00064         sad = vec_sum4s(t5, sad);
00065 
00066         pix1 += line_size;
00067         pix2 += line_size;
00068     }
00069     /* Sum up the four partial sums, and put the result into s */
00070     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
00071     sumdiffs = vec_splat(sumdiffs, 3);
00072     vec_ste(sumdiffs, 0, &s);
00073 
00074     return s;
00075 }
00076 
00077 static int sad16_y2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
00078 {
00079     int i;
00080     int s;
00081     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
00082     vector unsigned char *tv;
00083     vector unsigned char pix1v, pix2v, pix3v, avgv, t5;
00084     vector unsigned int sad;
00085     vector signed int sumdiffs;
00086     uint8_t *pix3 = pix2 + line_size;
00087 
00088     s = 0;
00089     sad = (vector unsigned int)vec_splat_u32(0);
00090 
00091     /* Due to the fact that pix3 = pix2 + line_size, the pix3 of one
00092        iteration becomes pix2 in the next iteration. We can use this
00093        fact to avoid a potentially expensive unaligned read, each
00094        time around the loop.
00095        Read unaligned pixels into our vectors. The vectors are as follows:
00096        pix2v: pix2[0]-pix2[15]
00097        Split the pixel vectors into shorts */
00098     tv = (vector unsigned char *) &pix2[0];
00099     pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
00100 
00101     for (i = 0; i < h; i++) {
00102         /* Read unaligned pixels into our vectors. The vectors are as follows:
00103            pix1v: pix1[0]-pix1[15]
00104            pix3v: pix3[0]-pix3[15] */
00105         tv = (vector unsigned char *) pix1;
00106         pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
00107 
00108         tv = (vector unsigned char *) &pix3[0];
00109         pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
00110 
00111         /* Calculate the average vector */
00112         avgv = vec_avg(pix2v, pix3v);
00113 
00114         /* Calculate a sum of abs differences vector */
00115         t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
00116 
00117         /* Add each 4 pixel group together and put 4 results into sad */
00118         sad = vec_sum4s(t5, sad);
00119 
00120         pix1 += line_size;
00121         pix2v = pix3v;
00122         pix3 += line_size;
00123 
00124     }
00125 
00126     /* Sum up the four partial sums, and put the result into s */
00127     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
00128     sumdiffs = vec_splat(sumdiffs, 3);
00129     vec_ste(sumdiffs, 0, &s);
00130     return s;
00131 }
00132 
00133 static int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
00134 {
00135     int i;
00136     int s;
00137     uint8_t *pix3 = pix2 + line_size;
00138     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
00139     const vector unsigned short two = (const vector unsigned short)vec_splat_u16(2);
00140     vector unsigned char *tv, avgv, t5;
00141     vector unsigned char pix1v, pix2v, pix3v, pix2iv, pix3iv;
00142     vector unsigned short pix2lv, pix2hv, pix2ilv, pix2ihv;
00143     vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;
00144     vector unsigned short avghv, avglv;
00145     vector unsigned short t1, t2, t3, t4;
00146     vector unsigned int sad;
00147     vector signed int sumdiffs;
00148 
00149     sad = (vector unsigned int)vec_splat_u32(0);
00150 
00151     s = 0;
00152 
00153     /* Due to the fact that pix3 = pix2 + line_size, the pix3 of one
00154        iteration becomes pix2 in the next iteration. We can use this
00155        fact to avoid a potentially expensive unaligned read, as well
00156        as some splitting, and vector addition each time around the loop.
00157        Read unaligned pixels into our vectors. The vectors are as follows:
00158        pix2v: pix2[0]-pix2[15]  pix2iv: pix2[1]-pix2[16]
00159        Split the pixel vectors into shorts */
00160     tv = (vector unsigned char *) &pix2[0];
00161     pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
00162 
00163     tv = (vector unsigned char *) &pix2[1];
00164     pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
00165 
00166     pix2hv  = (vector unsigned short) vec_mergeh(zero, pix2v);
00167     pix2lv  = (vector unsigned short) vec_mergel(zero, pix2v);
00168     pix2ihv = (vector unsigned short) vec_mergeh(zero, pix2iv);
00169     pix2ilv = (vector unsigned short) vec_mergel(zero, pix2iv);
00170     t1 = vec_add(pix2hv, pix2ihv);
00171     t2 = vec_add(pix2lv, pix2ilv);
00172 
00173     for (i = 0; i < h; i++) {
00174         /* Read unaligned pixels into our vectors. The vectors are as follows:
00175            pix1v: pix1[0]-pix1[15]
00176            pix3v: pix3[0]-pix3[15]      pix3iv: pix3[1]-pix3[16] */
00177         tv = (vector unsigned char *) pix1;
00178         pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
00179 
00180         tv = (vector unsigned char *) &pix3[0];
00181         pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
00182 
00183         tv = (vector unsigned char *) &pix3[1];
00184         pix3iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[1]));
00185 
00186         /* Note that AltiVec does have vec_avg, but this works on vector pairs
00187            and rounds up. We could do avg(avg(a,b),avg(c,d)), but the rounding
00188            would mean that, for example, avg(3,0,0,1) = 2, when it should be 1.
00189            Instead, we have to split the pixel vectors into vectors of shorts,
00190            and do the averaging by hand. */
00191 
00192         /* Split the pixel vectors into shorts */
00193         pix3hv  = (vector unsigned short) vec_mergeh(zero, pix3v);
00194         pix3lv  = (vector unsigned short) vec_mergel(zero, pix3v);
00195         pix3ihv = (vector unsigned short) vec_mergeh(zero, pix3iv);
00196         pix3ilv = (vector unsigned short) vec_mergel(zero, pix3iv);
00197 
00198         /* Do the averaging on them */
00199         t3 = vec_add(pix3hv, pix3ihv);
00200         t4 = vec_add(pix3lv, pix3ilv);
00201 
00202         avghv = vec_sr(vec_add(vec_add(t1, t3), two), two);
00203         avglv = vec_sr(vec_add(vec_add(t2, t4), two), two);
00204 
00205         /* Pack the shorts back into a result */
00206         avgv = vec_pack(avghv, avglv);
00207 
00208         /* Calculate a sum of abs differences vector */
00209         t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
00210 
00211         /* Add each 4 pixel group together and put 4 results into sad */
00212         sad = vec_sum4s(t5, sad);
00213 
00214         pix1 += line_size;
00215         pix3 += line_size;
00216         /* Transfer the calculated values for pix3 into pix2 */
00217         t1 = t3;
00218         t2 = t4;
00219     }
00220     /* Sum up the four partial sums, and put the result into s */
00221     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
00222     sumdiffs = vec_splat(sumdiffs, 3);
00223     vec_ste(sumdiffs, 0, &s);
00224 
00225     return s;
00226 }
00227 
00228 static int sad16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
00229 {
00230     int i;
00231     int s;
00232     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
00233     vector unsigned char perm1, perm2, pix1v_low, pix1v_high, pix2v_low, pix2v_high;
00234     vector unsigned char t1, t2, t3,t4, t5;
00235     vector unsigned int sad;
00236     vector signed int sumdiffs;
00237 
00238     sad = (vector unsigned int)vec_splat_u32(0);
00239 
00240 
00241     for (i = 0; i < h; i++) {
00242         /* Read potentially unaligned pixels into t1 and t2 */
00243         perm1 = vec_lvsl(0, pix1);
00244         pix1v_high = vec_ld( 0, pix1);
00245         pix1v_low  = vec_ld(15, pix1);
00246         perm2 = vec_lvsl(0, pix2);
00247         pix2v_high = vec_ld( 0, pix2);
00248         pix2v_low  = vec_ld(15, pix2);
00249         t1 = vec_perm(pix1v_high, pix1v_low, perm1);
00250         t2 = vec_perm(pix2v_high, pix2v_low, perm2);
00251 
00252         /* Calculate a sum of abs differences vector */
00253         t3 = vec_max(t1, t2);
00254         t4 = vec_min(t1, t2);
00255         t5 = vec_sub(t3, t4);
00256 
00257         /* Add each 4 pixel group together and put 4 results into sad */
00258         sad = vec_sum4s(t5, sad);
00259 
00260         pix1 += line_size;
00261         pix2 += line_size;
00262     }
00263 
00264     /* Sum up the four partial sums, and put the result into s */
00265     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
00266     sumdiffs = vec_splat(sumdiffs, 3);
00267     vec_ste(sumdiffs, 0, &s);
00268 
00269     return s;
00270 }
00271 
00272 static int sad8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
00273 {
00274     int i;
00275     int s;
00276     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
00277     vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;
00278     vector unsigned char t1, t2, t3,t4, t5;
00279     vector unsigned int sad;
00280     vector signed int sumdiffs;
00281 
00282     sad = (vector unsigned int)vec_splat_u32(0);
00283 
00284     permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
00285 
00286     for (i = 0; i < h; i++) {
00287         /* Read potentially unaligned pixels into t1 and t2
00288            Since we're reading 16 pixels, and actually only want 8,
00289            mask out the last 8 pixels. The 0s don't change the sum. */
00290         perm1 = vec_lvsl(0, pix1);
00291         pix1v = (vector unsigned char *) pix1;
00292         perm2 = vec_lvsl(0, pix2);
00293         pix2v = (vector unsigned char *) pix2;
00294         t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
00295         t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);
00296 
00297         /* Calculate a sum of abs differences vector */
00298         t3 = vec_max(t1, t2);
00299         t4 = vec_min(t1, t2);
00300         t5 = vec_sub(t3, t4);
00301 
00302         /* Add each 4 pixel group together and put 4 results into sad */
00303         sad = vec_sum4s(t5, sad);
00304 
00305         pix1 += line_size;
00306         pix2 += line_size;
00307     }
00308 
00309     /* Sum up the four partial sums, and put the result into s */
00310     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
00311     sumdiffs = vec_splat(sumdiffs, 3);
00312     vec_ste(sumdiffs, 0, &s);
00313 
00314     return s;
00315 }
00316 
00317 static int pix_norm1_altivec(uint8_t *pix, int line_size)
00318 {
00319     int i;
00320     int s;
00321     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
00322     vector unsigned char *tv;
00323     vector unsigned char pixv;
00324     vector unsigned int sv;
00325     vector signed int sum;
00326 
00327     sv = (vector unsigned int)vec_splat_u32(0);
00328 
00329     s = 0;
00330     for (i = 0; i < 16; i++) {
00331         /* Read in the potentially unaligned pixels */
00332         tv = (vector unsigned char *) pix;
00333         pixv = vec_perm(tv[0], tv[1], vec_lvsl(0, pix));
00334 
00335         /* Square the values, and add them to our sum */
00336         sv = vec_msum(pixv, pixv, sv);
00337 
00338         pix += line_size;
00339     }
00340     /* Sum up the four partial sums, and put the result into s */
00341     sum = vec_sums((vector signed int) sv, (vector signed int) zero);
00342     sum = vec_splat(sum, 3);
00343     vec_ste(sum, 0, &s);
00344 
00345     return s;
00346 }
00347 
00353 static int sse8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
00354 {
00355     int i;
00356     int s;
00357     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
00358     vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;
00359     vector unsigned char t1, t2, t3,t4, t5;
00360     vector unsigned int sum;
00361     vector signed int sumsqr;
00362 
00363     sum = (vector unsigned int)vec_splat_u32(0);
00364 
00365     permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
00366 
00367 
00368     for (i = 0; i < h; i++) {
00369         /* Read potentially unaligned pixels into t1 and t2
00370            Since we're reading 16 pixels, and actually only want 8,
00371            mask out the last 8 pixels. The 0s don't change the sum. */
00372         perm1 = vec_lvsl(0, pix1);
00373         pix1v = (vector unsigned char *) pix1;
00374         perm2 = vec_lvsl(0, pix2);
00375         pix2v = (vector unsigned char *) pix2;
00376         t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
00377         t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);
00378 
00379         /* Since we want to use unsigned chars, we can take advantage
00380            of the fact that abs(a-b)^2 = (a-b)^2. */
00381 
00382         /* Calculate abs differences vector */
00383         t3 = vec_max(t1, t2);
00384         t4 = vec_min(t1, t2);
00385         t5 = vec_sub(t3, t4);
00386 
00387         /* Square the values and add them to our sum */
00388         sum = vec_msum(t5, t5, sum);
00389 
00390         pix1 += line_size;
00391         pix2 += line_size;
00392     }
00393 
00394     /* Sum up the four partial sums, and put the result into s */
00395     sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
00396     sumsqr = vec_splat(sumsqr, 3);
00397     vec_ste(sumsqr, 0, &s);
00398 
00399     return s;
00400 }
00401 
00407 static int sse16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
00408 {
00409     int i;
00410     int s;
00411     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
00412     vector unsigned char perm1, perm2, *pix1v, *pix2v;
00413     vector unsigned char t1, t2, t3,t4, t5;
00414     vector unsigned int sum;
00415     vector signed int sumsqr;
00416 
00417     sum = (vector unsigned int)vec_splat_u32(0);
00418 
00419     for (i = 0; i < h; i++) {
00420         /* Read potentially unaligned pixels into t1 and t2 */
00421         perm1 = vec_lvsl(0, pix1);
00422         pix1v = (vector unsigned char *) pix1;
00423         perm2 = vec_lvsl(0, pix2);
00424         pix2v = (vector unsigned char *) pix2;
00425         t1 = vec_perm(pix1v[0], pix1v[1], perm1);
00426         t2 = vec_perm(pix2v[0], pix2v[1], perm2);
00427 
00428         /* Since we want to use unsigned chars, we can take advantage
00429            of the fact that abs(a-b)^2 = (a-b)^2. */
00430 
00431         /* Calculate abs differences vector */
00432         t3 = vec_max(t1, t2);
00433         t4 = vec_min(t1, t2);
00434         t5 = vec_sub(t3, t4);
00435 
00436         /* Square the values and add them to our sum */
00437         sum = vec_msum(t5, t5, sum);
00438 
00439         pix1 += line_size;
00440         pix2 += line_size;
00441     }
00442 
00443     /* Sum up the four partial sums, and put the result into s */
00444     sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
00445     sumsqr = vec_splat(sumsqr, 3);
00446     vec_ste(sumsqr, 0, &s);
00447 
00448     return s;
00449 }
00450 
00451 static int pix_sum_altivec(uint8_t * pix, int line_size)
00452 {
00453     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
00454     vector unsigned char perm, *pixv;
00455     vector unsigned char t1;
00456     vector unsigned int sad;
00457     vector signed int sumdiffs;
00458 
00459     int i;
00460     int s;
00461 
00462     sad = (vector unsigned int)vec_splat_u32(0);
00463 
00464     for (i = 0; i < 16; i++) {
00465         /* Read the potentially unaligned 16 pixels into t1 */
00466         perm = vec_lvsl(0, pix);
00467         pixv = (vector unsigned char *) pix;
00468         t1 = vec_perm(pixv[0], pixv[1], perm);
00469 
00470         /* Add each 4 pixel group together and put 4 results into sad */
00471         sad = vec_sum4s(t1, sad);
00472 
00473         pix += line_size;
00474     }
00475 
00476     /* Sum up the four partial sums, and put the result into s */
00477     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
00478     sumdiffs = vec_splat(sumdiffs, 3);
00479     vec_ste(sumdiffs, 0, &s);
00480 
00481     return s;
00482 }
00483 
00484 static void get_pixels_altivec(DCTELEM *restrict block, const uint8_t *pixels, int line_size)
00485 {
00486     int i;
00487     vector unsigned char perm, bytes, *pixv;
00488     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
00489     vector signed short shorts;
00490 
00491     for (i = 0; i < 8; i++) {
00492         // Read potentially unaligned pixels.
00493         // We're reading 16 pixels, and actually only want 8,
00494         // but we simply ignore the extras.
00495         perm = vec_lvsl(0, pixels);
00496         pixv = (vector unsigned char *) pixels;
00497         bytes = vec_perm(pixv[0], pixv[1], perm);
00498 
00499         // convert the bytes into shorts
00500         shorts = (vector signed short)vec_mergeh(zero, bytes);
00501 
00502         // save the data to the block, we assume the block is 16-byte aligned
00503         vec_st(shorts, i*16, (vector signed short*)block);
00504 
00505         pixels += line_size;
00506     }
00507 }
00508 
00509 static void diff_pixels_altivec(DCTELEM *restrict block, const uint8_t *s1,
00510         const uint8_t *s2, int stride)
00511 {
00512     int i;
00513     vector unsigned char perm, bytes, *pixv;
00514     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
00515     vector signed short shorts1, shorts2;
00516 
00517     for (i = 0; i < 4; i++) {
00518         // Read potentially unaligned pixels
00519         // We're reading 16 pixels, and actually only want 8,
00520         // but we simply ignore the extras.
00521         perm = vec_lvsl(0, s1);
00522         pixv = (vector unsigned char *) s1;
00523         bytes = vec_perm(pixv[0], pixv[1], perm);
00524 
00525         // convert the bytes into shorts
00526         shorts1 = (vector signed short)vec_mergeh(zero, bytes);
00527 
00528         // Do the same for the second block of pixels
00529         perm = vec_lvsl(0, s2);
00530         pixv = (vector unsigned char *) s2;
00531         bytes = vec_perm(pixv[0], pixv[1], perm);
00532 
00533         // convert the bytes into shorts
00534         shorts2 = (vector signed short)vec_mergeh(zero, bytes);
00535 
00536         // Do the subtraction
00537         shorts1 = vec_sub(shorts1, shorts2);
00538 
00539         // save the data to the block, we assume the block is 16-byte aligned
00540         vec_st(shorts1, 0, (vector signed short*)block);
00541 
00542         s1 += stride;
00543         s2 += stride;
00544         block += 8;
00545 
00546 
00547         // The code below is a copy of the code above... This is a manual
00548         // unroll.
00549 
00550         // Read potentially unaligned pixels
00551         // We're reading 16 pixels, and actually only want 8,
00552         // but we simply ignore the extras.
00553         perm = vec_lvsl(0, s1);
00554         pixv = (vector unsigned char *) s1;
00555         bytes = vec_perm(pixv[0], pixv[1], perm);
00556 
00557         // convert the bytes into shorts
00558         shorts1 = (vector signed short)vec_mergeh(zero, bytes);
00559 
00560         // Do the same for the second block of pixels
00561         perm = vec_lvsl(0, s2);
00562         pixv = (vector unsigned char *) s2;
00563         bytes = vec_perm(pixv[0], pixv[1], perm);
00564 
00565         // convert the bytes into shorts
00566         shorts2 = (vector signed short)vec_mergeh(zero, bytes);
00567 
00568         // Do the subtraction
00569         shorts1 = vec_sub(shorts1, shorts2);
00570 
00571         // save the data to the block, we assume the block is 16-byte aligned
00572         vec_st(shorts1, 0, (vector signed short*)block);
00573 
00574         s1 += stride;
00575         s2 += stride;
00576         block += 8;
00577     }
00578 }
00579 
00580 
00581 static void clear_block_altivec(DCTELEM *block) {
00582     LOAD_ZERO;
00583     vec_st(zero_s16v,   0, block);
00584     vec_st(zero_s16v,  16, block);
00585     vec_st(zero_s16v,  32, block);
00586     vec_st(zero_s16v,  48, block);
00587     vec_st(zero_s16v,  64, block);
00588     vec_st(zero_s16v,  80, block);
00589     vec_st(zero_s16v,  96, block);
00590     vec_st(zero_s16v, 112, block);
00591 }
00592 
00593 
00594 static void add_bytes_altivec(uint8_t *dst, uint8_t *src, int w) {
00595     register int i;
00596     register vector unsigned char vdst, vsrc;
00597 
00598     /* dst and src are 16 bytes-aligned (guaranteed) */
00599     for (i = 0 ; (i + 15) < w ; i+=16) {
00600         vdst = vec_ld(i, (unsigned char*)dst);
00601         vsrc = vec_ld(i, (unsigned char*)src);
00602         vdst = vec_add(vsrc, vdst);
00603         vec_st(vdst, i, (unsigned char*)dst);
00604     }
00605     /* if w is not a multiple of 16 */
00606     for (; (i < w) ; i++) {
00607         dst[i] = src[i];
00608     }
00609 }
00610 
00611 /* next one assumes that ((line_size % 16) == 0) */
00612 void put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
00613 {
00614     register vector unsigned char pixelsv1, pixelsv2;
00615     register vector unsigned char pixelsv1B, pixelsv2B;
00616     register vector unsigned char pixelsv1C, pixelsv2C;
00617     register vector unsigned char pixelsv1D, pixelsv2D;
00618 
00619     register vector unsigned char perm = vec_lvsl(0, pixels);
00620     int i;
00621     register int line_size_2 = line_size << 1;
00622     register int line_size_3 = line_size + line_size_2;
00623     register int line_size_4 = line_size << 2;
00624 
00625 // hand-unrolling the loop by 4 gains about 15%
00626 // mininum execution time goes from 74 to 60 cycles
00627 // it's faster than -funroll-loops, but using
00628 // -funroll-loops w/ this is bad - 74 cycles again.
00629 // all this is on a 7450, tuning for the 7450
00630 #if 0
00631     for (i = 0; i < h; i++) {
00632         pixelsv1 = vec_ld(0, pixels);
00633         pixelsv2 = vec_ld(16, pixels);
00634         vec_st(vec_perm(pixelsv1, pixelsv2, perm),
00635                0, block);
00636         pixels+=line_size;
00637         block +=line_size;
00638     }
00639 #else
00640     for (i = 0; i < h; i += 4) {
00641         pixelsv1  = vec_ld( 0, pixels);
00642         pixelsv2  = vec_ld(15, pixels);
00643         pixelsv1B = vec_ld(line_size, pixels);
00644         pixelsv2B = vec_ld(15 + line_size, pixels);
00645         pixelsv1C = vec_ld(line_size_2, pixels);
00646         pixelsv2C = vec_ld(15 + line_size_2, pixels);
00647         pixelsv1D = vec_ld(line_size_3, pixels);
00648         pixelsv2D = vec_ld(15 + line_size_3, pixels);
00649         vec_st(vec_perm(pixelsv1, pixelsv2, perm),
00650                0, (unsigned char*)block);
00651         vec_st(vec_perm(pixelsv1B, pixelsv2B, perm),
00652                line_size, (unsigned char*)block);
00653         vec_st(vec_perm(pixelsv1C, pixelsv2C, perm),
00654                line_size_2, (unsigned char*)block);
00655         vec_st(vec_perm(pixelsv1D, pixelsv2D, perm),
00656                line_size_3, (unsigned char*)block);
00657         pixels+=line_size_4;
00658         block +=line_size_4;
00659     }
00660 #endif
00661 }
00662 
00663 /* next one assumes that ((line_size % 16) == 0) */
00664 #define op_avg(a,b)  a = ( ((a)|(b)) - ((((a)^(b))&0xFEFEFEFEUL)>>1) )
00665 void avg_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
00666 {
00667     register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;
00668     register vector unsigned char perm = vec_lvsl(0, pixels);
00669     int i;
00670 
00671     for (i = 0; i < h; i++) {
00672         pixelsv1 = vec_ld( 0, pixels);
00673         pixelsv2 = vec_ld(16,pixels);
00674         blockv = vec_ld(0, block);
00675         pixelsv = vec_perm(pixelsv1, pixelsv2, perm);
00676         blockv = vec_avg(blockv,pixelsv);
00677         vec_st(blockv, 0, (unsigned char*)block);
00678         pixels+=line_size;
00679         block +=line_size;
00680     }
00681 }
00682 
00683 /* next one assumes that ((line_size % 8) == 0) */
00684 static void avg_pixels8_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
00685 {
00686     register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;
00687     int i;
00688 
00689    for (i = 0; i < h; i++) {
00690        /* block is 8 bytes-aligned, so we're either in the
00691           left block (16 bytes-aligned) or in the right block (not) */
00692        int rightside = ((unsigned long)block & 0x0000000F);
00693 
00694        blockv = vec_ld(0, block);
00695        pixelsv1 = vec_ld( 0, pixels);
00696        pixelsv2 = vec_ld(16, pixels);
00697        pixelsv = vec_perm(pixelsv1, pixelsv2, vec_lvsl(0, pixels));
00698 
00699        if (rightside) {
00700            pixelsv = vec_perm(blockv, pixelsv, vcprm(0,1,s0,s1));
00701        } else {
00702            pixelsv = vec_perm(blockv, pixelsv, vcprm(s0,s1,2,3));
00703        }
00704 
00705        blockv = vec_avg(blockv, pixelsv);
00706 
00707        vec_st(blockv, 0, block);
00708 
00709        pixels += line_size;
00710        block += line_size;
00711    }
00712 }
00713 
00714 /* next one assumes that ((line_size % 8) == 0) */
00715 static void put_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
00716 {
00717     register int i;
00718     register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
00719     register vector unsigned char blockv, temp1, temp2;
00720     register vector unsigned short pixelssum1, pixelssum2, temp3;
00721     register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
00722     register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
00723 
00724     temp1 = vec_ld(0, pixels);
00725     temp2 = vec_ld(16, pixels);
00726     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
00727     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {
00728         pixelsv2 = temp2;
00729     } else {
00730         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
00731     }
00732     pixelsv1 = vec_mergeh(vczero, pixelsv1);
00733     pixelsv2 = vec_mergeh(vczero, pixelsv2);
00734     pixelssum1 = vec_add((vector unsigned short)pixelsv1,
00735                          (vector unsigned short)pixelsv2);
00736     pixelssum1 = vec_add(pixelssum1, vctwo);
00737 
00738     for (i = 0; i < h ; i++) {
00739         int rightside = ((unsigned long)block & 0x0000000F);
00740         blockv = vec_ld(0, block);
00741 
00742         temp1 = vec_ld(line_size, pixels);
00743         temp2 = vec_ld(line_size + 16, pixels);
00744         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
00745         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {
00746             pixelsv2 = temp2;
00747         } else {
00748             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
00749         }
00750 
00751         pixelsv1 = vec_mergeh(vczero, pixelsv1);
00752         pixelsv2 = vec_mergeh(vczero, pixelsv2);
00753         pixelssum2 = vec_add((vector unsigned short)pixelsv1,
00754                              (vector unsigned short)pixelsv2);
00755         temp3 = vec_add(pixelssum1, pixelssum2);
00756         temp3 = vec_sra(temp3, vctwo);
00757         pixelssum1 = vec_add(pixelssum2, vctwo);
00758         pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
00759 
00760         if (rightside) {
00761             blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
00762         } else {
00763             blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
00764         }
00765 
00766         vec_st(blockv, 0, block);
00767 
00768         block += line_size;
00769         pixels += line_size;
00770     }
00771 }
00772 
00773 /* next one assumes that ((line_size % 8) == 0) */
00774 static void put_no_rnd_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
00775 {
00776     register int i;
00777     register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
00778     register vector unsigned char blockv, temp1, temp2;
00779     register vector unsigned short pixelssum1, pixelssum2, temp3;
00780     register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
00781     register const vector unsigned short vcone = (const vector unsigned short)vec_splat_u16(1);
00782     register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
00783 
00784     temp1 = vec_ld(0, pixels);
00785     temp2 = vec_ld(16, pixels);
00786     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
00787     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {
00788         pixelsv2 = temp2;
00789     } else {
00790         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
00791     }
00792     pixelsv1 = vec_mergeh(vczero, pixelsv1);
00793     pixelsv2 = vec_mergeh(vczero, pixelsv2);
00794     pixelssum1 = vec_add((vector unsigned short)pixelsv1,
00795                          (vector unsigned short)pixelsv2);
00796     pixelssum1 = vec_add(pixelssum1, vcone);
00797 
00798     for (i = 0; i < h ; i++) {
00799         int rightside = ((unsigned long)block & 0x0000000F);
00800         blockv = vec_ld(0, block);
00801 
00802         temp1 = vec_ld(line_size, pixels);
00803         temp2 = vec_ld(line_size + 16, pixels);
00804         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
00805         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {
00806             pixelsv2 = temp2;
00807         } else {
00808             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
00809         }
00810 
00811         pixelsv1 = vec_mergeh(vczero, pixelsv1);
00812         pixelsv2 = vec_mergeh(vczero, pixelsv2);
00813         pixelssum2 = vec_add((vector unsigned short)pixelsv1,
00814                              (vector unsigned short)pixelsv2);
00815         temp3 = vec_add(pixelssum1, pixelssum2);
00816         temp3 = vec_sra(temp3, vctwo);
00817         pixelssum1 = vec_add(pixelssum2, vcone);
00818         pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
00819 
00820         if (rightside) {
00821             blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
00822         } else {
00823             blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
00824         }
00825 
00826         vec_st(blockv, 0, block);
00827 
00828         block += line_size;
00829         pixels += line_size;
00830     }
00831 }
00832 
00833 /* next one assumes that ((line_size % 16) == 0) */
00834 static void put_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
00835 {
00836     register int i;
00837     register vector unsigned char pixelsv1, pixelsv2, pixelsv3, pixelsv4;
00838     register vector unsigned char blockv, temp1, temp2;
00839     register vector unsigned short temp3, temp4,
00840         pixelssum1, pixelssum2, pixelssum3, pixelssum4;
00841     register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
00842     register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
00843 
00844     temp1 = vec_ld(0, pixels);
00845     temp2 = vec_ld(16, pixels);
00846     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
00847     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {
00848         pixelsv2 = temp2;
00849     } else {
00850         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
00851     }
00852     pixelsv3 = vec_mergel(vczero, pixelsv1);
00853     pixelsv4 = vec_mergel(vczero, pixelsv2);
00854     pixelsv1 = vec_mergeh(vczero, pixelsv1);
00855     pixelsv2 = vec_mergeh(vczero, pixelsv2);
00856     pixelssum3 = vec_add((vector unsigned short)pixelsv3,
00857                          (vector unsigned short)pixelsv4);
00858     pixelssum3 = vec_add(pixelssum3, vctwo);
00859     pixelssum1 = vec_add((vector unsigned short)pixelsv1,
00860                          (vector unsigned short)pixelsv2);
00861     pixelssum1 = vec_add(pixelssum1, vctwo);
00862 
00863     for (i = 0; i < h ; i++) {
00864         blockv = vec_ld(0, block);
00865 
00866         temp1 = vec_ld(line_size, pixels);
00867         temp2 = vec_ld(line_size + 16, pixels);
00868         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
00869         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {
00870             pixelsv2 = temp2;
00871         } else {
00872             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
00873         }
00874 
00875         pixelsv3 = vec_mergel(vczero, pixelsv1);
00876         pixelsv4 = vec_mergel(vczero, pixelsv2);
00877         pixelsv1 = vec_mergeh(vczero, pixelsv1);
00878         pixelsv2 = vec_mergeh(vczero, pixelsv2);
00879 
00880         pixelssum4 = vec_add((vector unsigned short)pixelsv3,
00881                              (vector unsigned short)pixelsv4);
00882         pixelssum2 = vec_add((vector unsigned short)pixelsv1,
00883                              (vector unsigned short)pixelsv2);
00884         temp4 = vec_add(pixelssum3, pixelssum4);
00885         temp4 = vec_sra(temp4, vctwo);
00886         temp3 = vec_add(pixelssum1, pixelssum2);
00887         temp3 = vec_sra(temp3, vctwo);
00888 
00889         pixelssum3 = vec_add(pixelssum4, vctwo);
00890         pixelssum1 = vec_add(pixelssum2, vctwo);
00891 
00892         blockv = vec_packsu(temp3, temp4);
00893 
00894         vec_st(blockv, 0, block);
00895 
00896         block += line_size;
00897         pixels += line_size;
00898     }
00899 }
00900 
00901 /* next one assumes that ((line_size % 16) == 0) */
00902 static void put_no_rnd_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
00903 {
00904     register int i;
00905     register vector unsigned char pixelsv1, pixelsv2, pixelsv3, pixelsv4;
00906     register vector unsigned char blockv, temp1, temp2;
00907     register vector unsigned short temp3, temp4,
00908         pixelssum1, pixelssum2, pixelssum3, pixelssum4;
00909     register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);
00910     register const vector unsigned short vcone = (const vector unsigned short)vec_splat_u16(1);
00911     register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);
00912 
00913     temp1 = vec_ld(0, pixels);
00914     temp2 = vec_ld(16, pixels);
00915     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
00916     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {
00917         pixelsv2 = temp2;
00918     } else {
00919         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
00920     }
00921     pixelsv3 = vec_mergel(vczero, pixelsv1);
00922     pixelsv4 = vec_mergel(vczero, pixelsv2);
00923     pixelsv1 = vec_mergeh(vczero, pixelsv1);
00924     pixelsv2 = vec_mergeh(vczero, pixelsv2);
00925     pixelssum3 = vec_add((vector unsigned short)pixelsv3,
00926                          (vector unsigned short)pixelsv4);
00927     pixelssum3 = vec_add(pixelssum3, vcone);
00928     pixelssum1 = vec_add((vector unsigned short)pixelsv1,
00929                          (vector unsigned short)pixelsv2);
00930     pixelssum1 = vec_add(pixelssum1, vcone);
00931 
00932     for (i = 0; i < h ; i++) {
00933         blockv = vec_ld(0, block);
00934 
00935         temp1 = vec_ld(line_size, pixels);
00936         temp2 = vec_ld(line_size + 16, pixels);
00937         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
00938         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {
00939             pixelsv2 = temp2;
00940         } else {
00941             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
00942         }
00943 
00944         pixelsv3 = vec_mergel(vczero, pixelsv1);
00945         pixelsv4 = vec_mergel(vczero, pixelsv2);
00946         pixelsv1 = vec_mergeh(vczero, pixelsv1);
00947         pixelsv2 = vec_mergeh(vczero, pixelsv2);
00948 
00949         pixelssum4 = vec_add((vector unsigned short)pixelsv3,
00950                              (vector unsigned short)pixelsv4);
00951         pixelssum2 = vec_add((vector unsigned short)pixelsv1,
00952                              (vector unsigned short)pixelsv2);
00953         temp4 = vec_add(pixelssum3, pixelssum4);
00954         temp4 = vec_sra(temp4, vctwo);
00955         temp3 = vec_add(pixelssum1, pixelssum2);
00956         temp3 = vec_sra(temp3, vctwo);
00957 
00958         pixelssum3 = vec_add(pixelssum4, vcone);
00959         pixelssum1 = vec_add(pixelssum2, vcone);
00960 
00961         blockv = vec_packsu(temp3, temp4);
00962 
00963         vec_st(blockv, 0, block);
00964 
00965         block += line_size;
00966         pixels += line_size;
00967     }
00968 }
00969 
00970 static int hadamard8_diff8x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
00971     int sum;
00972     register const vector unsigned char vzero =
00973                             (const vector unsigned char)vec_splat_u8(0);
00974     register vector signed short temp0, temp1, temp2, temp3, temp4,
00975                                  temp5, temp6, temp7;
00976     {
00977     register const vector signed short vprod1 =(const vector signed short)
00978                                                { 1,-1, 1,-1, 1,-1, 1,-1 };
00979     register const vector signed short vprod2 =(const vector signed short)
00980                                                { 1, 1,-1,-1, 1, 1,-1,-1 };
00981     register const vector signed short vprod3 =(const vector signed short)
00982                                                { 1, 1, 1, 1,-1,-1,-1,-1 };
00983     register const vector unsigned char perm1 = (const vector unsigned char)
00984         {0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
00985          0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};
00986     register const vector unsigned char perm2 = (const vector unsigned char)
00987         {0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
00988          0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};
00989     register const vector unsigned char perm3 = (const vector unsigned char)
00990         {0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
00991          0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
00992 
00993 #define ONEITERBUTTERFLY(i, res)                                          \
00994     {                                                                     \
00995     register vector unsigned char src1, src2, srcO;                   \
00996     register vector unsigned char dst1, dst2, dstO;                   \
00997     register vector signed short srcV, dstV;                          \
00998     register vector signed short but0, but1, but2, op1, op2, op3;     \
00999     src1 = vec_ld(stride * i, src);                                   \
01000     src2 = vec_ld((stride * i) + 15, src);                            \
01001     srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src));           \
01002     dst1 = vec_ld(stride * i, dst);                                   \
01003     dst2 = vec_ld((stride * i) + 15, dst);                            \
01004     dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));           \
01005     /* promote the unsigned chars to signed shorts */                 \
01006     /* we're in the 8x8 function, we only care for the first 8 */     \
01007     srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \
01008            (vector signed char)srcO);                                 \
01009     dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \
01010            (vector signed char)dstO);                                 \
01011     /* subtractions inside the first butterfly */                     \
01012     but0 = vec_sub(srcV, dstV);                                       \
01013     op1  = vec_perm(but0, but0, perm1);                               \
01014     but1 = vec_mladd(but0, vprod1, op1);                              \
01015     op2  = vec_perm(but1, but1, perm2);                               \
01016     but2 = vec_mladd(but1, vprod2, op2);                              \
01017     op3  = vec_perm(but2, but2, perm3);                               \
01018     res  = vec_mladd(but2, vprod3, op3);                              \
01019     }
01020     ONEITERBUTTERFLY(0, temp0);
01021     ONEITERBUTTERFLY(1, temp1);
01022     ONEITERBUTTERFLY(2, temp2);
01023     ONEITERBUTTERFLY(3, temp3);
01024     ONEITERBUTTERFLY(4, temp4);
01025     ONEITERBUTTERFLY(5, temp5);
01026     ONEITERBUTTERFLY(6, temp6);
01027     ONEITERBUTTERFLY(7, temp7);
01028     }
01029 #undef ONEITERBUTTERFLY
01030     {
01031     register vector signed int vsum;
01032     register vector signed short line0 = vec_add(temp0, temp1);
01033     register vector signed short line1 = vec_sub(temp0, temp1);
01034     register vector signed short line2 = vec_add(temp2, temp3);
01035     register vector signed short line3 = vec_sub(temp2, temp3);
01036     register vector signed short line4 = vec_add(temp4, temp5);
01037     register vector signed short line5 = vec_sub(temp4, temp5);
01038     register vector signed short line6 = vec_add(temp6, temp7);
01039     register vector signed short line7 = vec_sub(temp6, temp7);
01040 
01041     register vector signed short line0B = vec_add(line0, line2);
01042     register vector signed short line2B = vec_sub(line0, line2);
01043     register vector signed short line1B = vec_add(line1, line3);
01044     register vector signed short line3B = vec_sub(line1, line3);
01045     register vector signed short line4B = vec_add(line4, line6);
01046     register vector signed short line6B = vec_sub(line4, line6);
01047     register vector signed short line5B = vec_add(line5, line7);
01048     register vector signed short line7B = vec_sub(line5, line7);
01049 
01050     register vector signed short line0C = vec_add(line0B, line4B);
01051     register vector signed short line4C = vec_sub(line0B, line4B);
01052     register vector signed short line1C = vec_add(line1B, line5B);
01053     register vector signed short line5C = vec_sub(line1B, line5B);
01054     register vector signed short line2C = vec_add(line2B, line6B);
01055     register vector signed short line6C = vec_sub(line2B, line6B);
01056     register vector signed short line3C = vec_add(line3B, line7B);
01057     register vector signed short line7C = vec_sub(line3B, line7B);
01058 
01059     vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
01060     vsum = vec_sum4s(vec_abs(line1C), vsum);
01061     vsum = vec_sum4s(vec_abs(line2C), vsum);
01062     vsum = vec_sum4s(vec_abs(line3C), vsum);
01063     vsum = vec_sum4s(vec_abs(line4C), vsum);
01064     vsum = vec_sum4s(vec_abs(line5C), vsum);
01065     vsum = vec_sum4s(vec_abs(line6C), vsum);
01066     vsum = vec_sum4s(vec_abs(line7C), vsum);
01067     vsum = vec_sums(vsum, (vector signed int)vzero);
01068     vsum = vec_splat(vsum, 3);
01069     vec_ste(vsum, 0, &sum);
01070     }
01071     return sum;
01072 }
01073 
01074 /*
01075 16x8 works with 16 elements; it allows to avoid replicating loads, and
01076 give the compiler more rooms for scheduling.  It's only used from
01077 inside hadamard8_diff16_altivec.
01078 
01079 Unfortunately, it seems gcc-3.3 is a bit dumb, and the compiled code has a LOT
01080 of spill code, it seems gcc (unlike xlc) cannot keep everything in registers
01081 by itself. The following code include hand-made registers allocation. It's not
01082 clean, but on a 7450 the resulting code is much faster (best case fall from
01083 700+ cycles to 550).
01084 
01085 xlc doesn't add spill code, but it doesn't know how to schedule for the 7450,
01086 and its code isn't much faster than gcc-3.3 on the 7450 (but uses 25% less
01087 instructions...)
01088 
01089 On the 970, the hand-made RA is still a win (around 690 vs. around 780), but
01090 xlc goes to around 660 on the regular C code...
01091 */
01092 
01093 static int hadamard8_diff16x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h) {
01094     int sum;
01095     register vector signed short
01096         temp0 __asm__ ("v0"),
01097         temp1 __asm__ ("v1"),
01098         temp2 __asm__ ("v2"),
01099         temp3 __asm__ ("v3"),
01100         temp4 __asm__ ("v4"),
01101         temp5 __asm__ ("v5"),
01102         temp6 __asm__ ("v6"),
01103         temp7 __asm__ ("v7");
01104     register vector signed short
01105         temp0S __asm__ ("v8"),
01106         temp1S __asm__ ("v9"),
01107         temp2S __asm__ ("v10"),
01108         temp3S __asm__ ("v11"),
01109         temp4S __asm__ ("v12"),
01110         temp5S __asm__ ("v13"),
01111         temp6S __asm__ ("v14"),
01112         temp7S __asm__ ("v15");
01113     register const vector unsigned char vzero __asm__ ("v31") =
01114         (const vector unsigned char)vec_splat_u8(0);
01115     {
01116     register const vector signed short vprod1 __asm__ ("v16") =
01117         (const vector signed short){ 1,-1, 1,-1, 1,-1, 1,-1 };
01118     register const vector signed short vprod2 __asm__ ("v17") =
01119         (const vector signed short){ 1, 1,-1,-1, 1, 1,-1,-1 };
01120     register const vector signed short vprod3 __asm__ ("v18") =
01121         (const vector signed short){ 1, 1, 1, 1,-1,-1,-1,-1 };
01122     register const vector unsigned char perm1 __asm__ ("v19") =
01123         (const vector unsigned char)
01124         {0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
01125          0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};
01126     register const vector unsigned char perm2 __asm__ ("v20") =
01127         (const vector unsigned char)
01128         {0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
01129          0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};
01130     register const vector unsigned char perm3 __asm__ ("v21") =
01131         (const vector unsigned char)
01132         {0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
01133          0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
01134 
01135 #define ONEITERBUTTERFLY(i, res1, res2)                               \
01136     {                                                                 \
01137     register vector unsigned char src1 __asm__ ("v22"),               \
01138                                   src2 __asm__ ("v23"),               \
01139                                   dst1 __asm__ ("v24"),               \
01140                                   dst2 __asm__ ("v25"),               \
01141                                   srcO __asm__ ("v22"),               \
01142                                   dstO __asm__ ("v23");               \
01143                                                                       \
01144     register vector signed short  srcV  __asm__ ("v24"),              \
01145                                   dstV  __asm__ ("v25"),              \
01146                                   srcW  __asm__ ("v26"),              \
01147                                   dstW  __asm__ ("v27"),              \
01148                                   but0  __asm__ ("v28"),              \
01149                                   but0S __asm__ ("v29"),              \
01150                                   op1   __asm__ ("v30"),              \
01151                                   but1  __asm__ ("v22"),              \
01152                                   op1S  __asm__ ("v23"),              \
01153                                   but1S __asm__ ("v24"),              \
01154                                   op2   __asm__ ("v25"),              \
01155                                   but2  __asm__ ("v26"),              \
01156                                   op2S  __asm__ ("v27"),              \
01157                                   but2S __asm__ ("v28"),              \
01158                                   op3   __asm__ ("v29"),              \
01159                                   op3S  __asm__ ("v30");              \
01160                                                                       \
01161     src1 = vec_ld(stride * i, src);                                   \
01162     src2 = vec_ld((stride * i) + 16, src);                            \
01163     srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src));           \
01164     dst1 = vec_ld(stride * i, dst);                                   \
01165     dst2 = vec_ld((stride * i) + 16, dst);                            \
01166     dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));           \
01167     /* promote the unsigned chars to signed shorts */                 \
01168     srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \
01169            (vector signed char)srcO);                                 \
01170     dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \
01171            (vector signed char)dstO);                                 \
01172     srcW = (vector signed short)vec_mergel((vector signed char)vzero, \
01173            (vector signed char)srcO);                                 \
01174     dstW = (vector signed short)vec_mergel((vector signed char)vzero, \
01175            (vector signed char)dstO);                                 \
01176     /* subtractions inside the first butterfly */                     \
01177     but0 = vec_sub(srcV, dstV);                                       \
01178     but0S = vec_sub(srcW, dstW);                                      \
01179     op1 = vec_perm(but0, but0, perm1);                                \
01180     but1 = vec_mladd(but0, vprod1, op1);                              \
01181     op1S = vec_perm(but0S, but0S, perm1);                             \
01182     but1S = vec_mladd(but0S, vprod1, op1S);                           \
01183     op2 = vec_perm(but1, but1, perm2);                                \
01184     but2 = vec_mladd(but1, vprod2, op2);                              \
01185     op2S = vec_perm(but1S, but1S, perm2);                             \
01186     but2S = vec_mladd(but1S, vprod2, op2S);                           \
01187     op3 = vec_perm(but2, but2, perm3);                                \
01188     res1 = vec_mladd(but2, vprod3, op3);                              \
01189     op3S = vec_perm(but2S, but2S, perm3);                             \
01190     res2 = vec_mladd(but2S, vprod3, op3S);                            \
01191     }
01192     ONEITERBUTTERFLY(0, temp0, temp0S);
01193     ONEITERBUTTERFLY(1, temp1, temp1S);
01194     ONEITERBUTTERFLY(2, temp2, temp2S);
01195     ONEITERBUTTERFLY(3, temp3, temp3S);
01196     ONEITERBUTTERFLY(4, temp4, temp4S);
01197     ONEITERBUTTERFLY(5, temp5, temp5S);
01198     ONEITERBUTTERFLY(6, temp6, temp6S);
01199     ONEITERBUTTERFLY(7, temp7, temp7S);
01200     }
01201 #undef ONEITERBUTTERFLY
01202     {
01203     register vector signed int vsum;
01204     register vector signed short line0S, line1S, line2S, line3S, line4S,
01205                                  line5S, line6S, line7S, line0BS,line2BS,
01206                                  line1BS,line3BS,line4BS,line6BS,line5BS,
01207                                  line7BS,line0CS,line4CS,line1CS,line5CS,
01208                                  line2CS,line6CS,line3CS,line7CS;
01209 
01210     register vector signed short line0 = vec_add(temp0, temp1);
01211     register vector signed short line1 = vec_sub(temp0, temp1);
01212     register vector signed short line2 = vec_add(temp2, temp3);
01213     register vector signed short line3 = vec_sub(temp2, temp3);
01214     register vector signed short line4 = vec_add(temp4, temp5);
01215     register vector signed short line5 = vec_sub(temp4, temp5);
01216     register vector signed short line6 = vec_add(temp6, temp7);
01217     register vector signed short line7 = vec_sub(temp6, temp7);
01218 
01219     register vector signed short line0B = vec_add(line0, line2);
01220     register vector signed short line2B = vec_sub(line0, line2);
01221     register vector signed short line1B = vec_add(line1, line3);
01222     register vector signed short line3B = vec_sub(line1, line3);
01223     register vector signed short line4B = vec_add(line4, line6);
01224     register vector signed short line6B = vec_sub(line4, line6);
01225     register vector signed short line5B = vec_add(line5, line7);
01226     register vector signed short line7B = vec_sub(line5, line7);
01227 
01228     register vector signed short line0C = vec_add(line0B, line4B);
01229     register vector signed short line4C = vec_sub(line0B, line4B);
01230     register vector signed short line1C = vec_add(line1B, line5B);
01231     register vector signed short line5C = vec_sub(line1B, line5B);
01232     register vector signed short line2C = vec_add(line2B, line6B);
01233     register vector signed short line6C = vec_sub(line2B, line6B);
01234     register vector signed short line3C = vec_add(line3B, line7B);
01235     register vector signed short line7C = vec_sub(line3B, line7B);
01236 
01237     vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
01238     vsum = vec_sum4s(vec_abs(line1C), vsum);
01239     vsum = vec_sum4s(vec_abs(line2C), vsum);
01240     vsum = vec_sum4s(vec_abs(line3C), vsum);
01241     vsum = vec_sum4s(vec_abs(line4C), vsum);
01242     vsum = vec_sum4s(vec_abs(line5C), vsum);
01243     vsum = vec_sum4s(vec_abs(line6C), vsum);
01244     vsum = vec_sum4s(vec_abs(line7C), vsum);
01245 
01246     line0S = vec_add(temp0S, temp1S);
01247     line1S = vec_sub(temp0S, temp1S);
01248     line2S = vec_add(temp2S, temp3S);
01249     line3S = vec_sub(temp2S, temp3S);
01250     line4S = vec_add(temp4S, temp5S);
01251     line5S = vec_sub(temp4S, temp5S);
01252     line6S = vec_add(temp6S, temp7S);
01253     line7S = vec_sub(temp6S, temp7S);
01254 
01255     line0BS = vec_add(line0S, line2S);
01256     line2BS = vec_sub(line0S, line2S);
01257     line1BS = vec_add(line1S, line3S);
01258     line3BS = vec_sub(line1S, line3S);
01259     line4BS = vec_add(line4S, line6S);
01260     line6BS = vec_sub(line4S, line6S);
01261     line5BS = vec_add(line5S, line7S);
01262     line7BS = vec_sub(line5S, line7S);
01263 
01264     line0CS = vec_add(line0BS, line4BS);
01265     line4CS = vec_sub(line0BS, line4BS);
01266     line1CS = vec_add(line1BS, line5BS);
01267     line5CS = vec_sub(line1BS, line5BS);
01268     line2CS = vec_add(line2BS, line6BS);
01269     line6CS = vec_sub(line2BS, line6BS);
01270     line3CS = vec_add(line3BS, line7BS);
01271     line7CS = vec_sub(line3BS, line7BS);
01272 
01273     vsum = vec_sum4s(vec_abs(line0CS), vsum);
01274     vsum = vec_sum4s(vec_abs(line1CS), vsum);
01275     vsum = vec_sum4s(vec_abs(line2CS), vsum);
01276     vsum = vec_sum4s(vec_abs(line3CS), vsum);
01277     vsum = vec_sum4s(vec_abs(line4CS), vsum);
01278     vsum = vec_sum4s(vec_abs(line5CS), vsum);
01279     vsum = vec_sum4s(vec_abs(line6CS), vsum);
01280     vsum = vec_sum4s(vec_abs(line7CS), vsum);
01281     vsum = vec_sums(vsum, (vector signed int)vzero);
01282     vsum = vec_splat(vsum, 3);
01283     vec_ste(vsum, 0, &sum);
01284     }
01285     return sum;
01286 }
01287 
01288 static int hadamard8_diff16_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
01289     int score;
01290     score = hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
01291     if (h==16) {
01292         dst += 8*stride;
01293         src += 8*stride;
01294         score += hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
01295     }
01296     return score;
01297 }
01298 
01299 static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
01300                                             int blocksize)
01301 {
01302     int i;
01303     vector float m, a;
01304     vector bool int t0, t1;
01305     const vector unsigned int v_31 = //XXX
01306         vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
01307     for (i = 0; i < blocksize; i += 4) {
01308         m = vec_ld(0, mag+i);
01309         a = vec_ld(0, ang+i);
01310         t0 = vec_cmple(m, (vector float)vec_splat_u32(0));
01311         t1 = vec_cmple(a, (vector float)vec_splat_u32(0));
01312         a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));
01313         t0 = (vector bool int)vec_and(a, t1);
01314         t1 = (vector bool int)vec_andc(a, t1);
01315         a = vec_sub(m, (vector float)t1);
01316         m = vec_add(m, (vector float)t0);
01317         vec_stl(a, 0, ang+i);
01318         vec_stl(m, 0, mag+i);
01319     }
01320 }
01321 
01322 /* next one assumes that ((line_size % 8) == 0) */
01323 static void avg_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
01324 {
01325     register int i;
01326     register vector unsigned char pixelsv1, pixelsv2, pixelsavg;
01327     register vector unsigned char blockv, temp1, temp2, blocktemp;
01328     register vector unsigned short pixelssum1, pixelssum2, temp3;
01329 
01330     register const vector unsigned char vczero = (const vector unsigned char)
01331                                         vec_splat_u8(0);
01332     register const vector unsigned short vctwo = (const vector unsigned short)
01333                                         vec_splat_u16(2);
01334 
01335     temp1 = vec_ld(0, pixels);
01336     temp2 = vec_ld(16, pixels);
01337     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
01338     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {
01339         pixelsv2 = temp2;
01340     } else {
01341         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
01342     }
01343     pixelsv1 = vec_mergeh(vczero, pixelsv1);
01344     pixelsv2 = vec_mergeh(vczero, pixelsv2);
01345     pixelssum1 = vec_add((vector unsigned short)pixelsv1,
01346                          (vector unsigned short)pixelsv2);
01347     pixelssum1 = vec_add(pixelssum1, vctwo);
01348 
01349     for (i = 0; i < h ; i++) {
01350         int rightside = ((unsigned long)block & 0x0000000F);
01351         blockv = vec_ld(0, block);
01352 
01353         temp1 = vec_ld(line_size, pixels);
01354         temp2 = vec_ld(line_size + 16, pixels);
01355         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
01356         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {
01357             pixelsv2 = temp2;
01358         } else {
01359             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
01360         }
01361 
01362         pixelsv1 = vec_mergeh(vczero, pixelsv1);
01363         pixelsv2 = vec_mergeh(vczero, pixelsv2);
01364         pixelssum2 = vec_add((vector unsigned short)pixelsv1,
01365                              (vector unsigned short)pixelsv2);
01366         temp3 = vec_add(pixelssum1, pixelssum2);
01367         temp3 = vec_sra(temp3, vctwo);
01368         pixelssum1 = vec_add(pixelssum2, vctwo);
01369         pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
01370 
01371         if (rightside) {
01372             blocktemp = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
01373         } else {
01374             blocktemp = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
01375         }
01376 
01377         blockv = vec_avg(blocktemp, blockv);
01378         vec_st(blockv, 0, block);
01379 
01380         block += line_size;
01381         pixels += line_size;
01382     }
01383 }
01384 
01385 void dsputil_init_altivec(DSPContext* c, AVCodecContext *avctx)
01386 {
01387     const int high_bit_depth = avctx->codec_id == CODEC_ID_H264 && avctx->bits_per_raw_sample > 8;
01388 
01389     c->pix_abs[0][1] = sad16_x2_altivec;
01390     c->pix_abs[0][2] = sad16_y2_altivec;
01391     c->pix_abs[0][3] = sad16_xy2_altivec;
01392     c->pix_abs[0][0] = sad16_altivec;
01393     c->pix_abs[1][0] = sad8_altivec;
01394     c->sad[0]= sad16_altivec;
01395     c->sad[1]= sad8_altivec;
01396     c->pix_norm1 = pix_norm1_altivec;
01397     c->sse[1]= sse8_altivec;
01398     c->sse[0]= sse16_altivec;
01399     c->pix_sum = pix_sum_altivec;
01400     c->diff_pixels = diff_pixels_altivec;
01401     c->get_pixels = get_pixels_altivec;
01402     if (!high_bit_depth)
01403     c->clear_block = clear_block_altivec;
01404     c->add_bytes= add_bytes_altivec;
01405     if (!high_bit_depth) {
01406     c->put_pixels_tab[0][0] = put_pixels16_altivec;
01407     /* the two functions do the same thing, so use the same code */
01408     c->put_no_rnd_pixels_tab[0][0] = put_pixels16_altivec;
01409     c->avg_pixels_tab[0][0] = avg_pixels16_altivec;
01410     c->avg_pixels_tab[1][0] = avg_pixels8_altivec;
01411     c->avg_pixels_tab[1][3] = avg_pixels8_xy2_altivec;
01412     c->put_pixels_tab[1][3] = put_pixels8_xy2_altivec;
01413     c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_altivec;
01414     c->put_pixels_tab[0][3] = put_pixels16_xy2_altivec;
01415     c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_altivec;
01416     }
01417 
01418     c->hadamard8_diff[0] = hadamard8_diff16_altivec;
01419     c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;
01420     if (CONFIG_VORBIS_DECODER)
01421         c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;
01422 }

Generated on Fri Feb 22 2013 07:24:28 for FFmpeg by  doxygen 1.7.1