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FFmpeg/libavcodec/ppc/dsputil_altivec.c

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  1. /*

  2.  * Copyright (c) 2002 Brian Foley

  3.  * Copyright (c) 2002 Dieter Shirley

  4.  * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  8.  * FFmpeg is free software; you can redistribute it and/or

  9.  * modify it under the terms of the GNU Lesser General Public

  10.  * License as published by the Free Software Foundation; either

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * FFmpeg is distributed in the hope that it will be useful,

  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  * Lesser General Public License for more details.

  17.  *

  18.  * You should have received a copy of the GNU Lesser General Public

  19.  * License along with FFmpeg; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  */

  22. 

  23. #include "config.h"

  24. #if HAVE_ALTIVEC_H

  25. #include <altivec.h>

  26. #endif

  27. #include "libavcodec/dsputil.h"

  28. #include "dsputil_ppc.h"

  29. #include "util_altivec.h"

  30. #include "types_altivec.h"

  31. 

  32. int sad16_x2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)

  33. {

  34.     int i;

  35.     int s;

  36.     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);

  37.     vector unsigned char *tv;

  38.     vector unsigned char pix1v, pix2v, pix2iv, avgv, t5;

  39.     vector unsigned int sad;

  40.     vector signed int sumdiffs;

  41. 

  42.     s = 0;

  43.     sad = (vector unsigned int)vec_splat_u32(0);

  44.     for (i = 0; i < h; i++) {

  45.         /* Read unaligned pixels into our vectors. The vectors are as follows:

  46.            pix1v: pix1[0]-pix1[15]

  47.            pix2v: pix2[0]-pix2[15]      pix2iv: pix2[1]-pix2[16] */

  48.         tv = (vector unsigned char *) pix1;

  49.         pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));

  50. 

  51.         tv = (vector unsigned char *) &pix2[0];

  52.         pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));

  53. 

  54.         tv = (vector unsigned char *) &pix2[1];

  55.         pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));

  56. 

  57.         /* Calculate the average vector */

  58.         avgv = vec_avg(pix2v, pix2iv);

  59. 

  60.         /* Calculate a sum of abs differences vector */

  61.         t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));

  62. 

  63.         /* Add each 4 pixel group together and put 4 results into sad */

  64.         sad = vec_sum4s(t5, sad);

  65. 

  66.         pix1 += line_size;

  67.         pix2 += line_size;

  68.     }

  69.     /* Sum up the four partial sums, and put the result into s */

  70.     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);

  71.     sumdiffs = vec_splat(sumdiffs, 3);

  72.     vec_ste(sumdiffs, 0, &s);

  73. 

  74.     return s;

  75. }

  76. 

  77. int sad16_y2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)

  78. {

  79.     int i;

  80.     int s;

  81.     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);

  82.     vector unsigned char *tv;

  83.     vector unsigned char pix1v, pix2v, pix3v, avgv, t5;

  84.     vector unsigned int sad;

  85.     vector signed int sumdiffs;

  86.     uint8_t *pix3 = pix2 + line_size;

  87. 

  88.     s = 0;

  89.     sad = (vector unsigned int)vec_splat_u32(0);

  90. 

  91.     /* Due to the fact that pix3 = pix2 + line_size, the pix3 of one

  92.        iteration becomes pix2 in the next iteration. We can use this

  93.        fact to avoid a potentially expensive unaligned read, each

  94.        time around the loop.

  95.        Read unaligned pixels into our vectors. The vectors are as follows:

  96.        pix2v: pix2[0]-pix2[15]

  97.        Split the pixel vectors into shorts */

  98.     tv = (vector unsigned char *) &pix2[0];

  99.     pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));

  100. 

  101.     for (i = 0; i < h; i++) {

  102.         /* Read unaligned pixels into our vectors. The vectors are as follows:

  103.            pix1v: pix1[0]-pix1[15]

  104.            pix3v: pix3[0]-pix3[15] */

  105.         tv = (vector unsigned char *) pix1;

  106.         pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));

  107. 

  108.         tv = (vector unsigned char *) &pix3[0];

  109.         pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));

  110. 

  111.         /* Calculate the average vector */

  112.         avgv = vec_avg(pix2v, pix3v);

  113. 

  114.         /* Calculate a sum of abs differences vector */

  115.         t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));

  116. 

  117.         /* Add each 4 pixel group together and put 4 results into sad */

  118.         sad = vec_sum4s(t5, sad);

  119. 

  120.         pix1 += line_size;

  121.         pix2v = pix3v;

  122.         pix3 += line_size;

  123. 

  124.     }

  125. 

  126.     /* Sum up the four partial sums, and put the result into s */

  127.     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);

  128.     sumdiffs = vec_splat(sumdiffs, 3);

  129.     vec_ste(sumdiffs, 0, &s);

  130.     return s;

  131. }

  132. 

  133. int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)

  134. {

  135.     int i;

  136.     int s;

  137.     uint8_t *pix3 = pix2 + line_size;

  138.     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);

  139.     const vector unsigned short two = (const vector unsigned short)vec_splat_u16(2);

  140.     vector unsigned char *tv, avgv, t5;

  141.     vector unsigned char pix1v, pix2v, pix3v, pix2iv, pix3iv;

  142.     vector unsigned short pix2lv, pix2hv, pix2ilv, pix2ihv;

  143.     vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;

  144.     vector unsigned short avghv, avglv;

  145.     vector unsigned short t1, t2, t3, t4;

  146.     vector unsigned int sad;

  147.     vector signed int sumdiffs;

  148. 

  149.     sad = (vector unsigned int)vec_splat_u32(0);

  150. 

  151.     s = 0;

  152. 

  153.     /* Due to the fact that pix3 = pix2 + line_size, the pix3 of one

  154.        iteration becomes pix2 in the next iteration. We can use this

  155.        fact to avoid a potentially expensive unaligned read, as well

  156.        as some splitting, and vector addition each time around the loop.

  157.        Read unaligned pixels into our vectors. The vectors are as follows:

  158.        pix2v: pix2[0]-pix2[15]  pix2iv: pix2[1]-pix2[16]

  159.        Split the pixel vectors into shorts */

  160.     tv = (vector unsigned char *) &pix2[0];

  161.     pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));

  162. 

  163.     tv = (vector unsigned char *) &pix2[1];

  164.     pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));

  165. 

  166.     pix2hv  = (vector unsigned short) vec_mergeh(zero, pix2v);

  167.     pix2lv  = (vector unsigned short) vec_mergel(zero, pix2v);

  168.     pix2ihv = (vector unsigned short) vec_mergeh(zero, pix2iv);

  169.     pix2ilv = (vector unsigned short) vec_mergel(zero, pix2iv);

  170.     t1 = vec_add(pix2hv, pix2ihv);

  171.     t2 = vec_add(pix2lv, pix2ilv);

  172. 

  173.     for (i = 0; i < h; i++) {

  174.         /* Read unaligned pixels into our vectors. The vectors are as follows:

  175.            pix1v: pix1[0]-pix1[15]

  176.            pix3v: pix3[0]-pix3[15]      pix3iv: pix3[1]-pix3[16] */

  177.         tv = (vector unsigned char *) pix1;

  178.         pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));

  179. 

  180.         tv = (vector unsigned char *) &pix3[0];

  181.         pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));

  182. 

  183.         tv = (vector unsigned char *) &pix3[1];

  184.         pix3iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[1]));

  185. 

  186.         /* Note that AltiVec does have vec_avg, but this works on vector pairs

  187.            and rounds up. We could do avg(avg(a,b),avg(c,d)), but the rounding

  188.            would mean that, for example, avg(3,0,0,1) = 2, when it should be 1.

  189.            Instead, we have to split the pixel vectors into vectors of shorts,

  190.            and do the averaging by hand. */

  191. 

  192.         /* Split the pixel vectors into shorts */

  193.         pix3hv  = (vector unsigned short) vec_mergeh(zero, pix3v);

  194.         pix3lv  = (vector unsigned short) vec_mergel(zero, pix3v);

  195.         pix3ihv = (vector unsigned short) vec_mergeh(zero, pix3iv);

  196.         pix3ilv = (vector unsigned short) vec_mergel(zero, pix3iv);

  197. 

  198.         /* Do the averaging on them */

  199.         t3 = vec_add(pix3hv, pix3ihv);

  200.         t4 = vec_add(pix3lv, pix3ilv);

  201. 

  202.         avghv = vec_sr(vec_add(vec_add(t1, t3), two), two);

  203.         avglv = vec_sr(vec_add(vec_add(t2, t4), two), two);

  204. 

  205.         /* Pack the shorts back into a result */

  206.         avgv = vec_pack(avghv, avglv);

  207. 

  208.         /* Calculate a sum of abs differences vector */

  209.         t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));

  210. 

  211.         /* Add each 4 pixel group together and put 4 results into sad */

  212.         sad = vec_sum4s(t5, sad);

  213. 

  214.         pix1 += line_size;

  215.         pix3 += line_size;

  216.         /* Transfer the calculated values for pix3 into pix2 */

  217.         t1 = t3;

  218.         t2 = t4;

  219.     }

  220.     /* Sum up the four partial sums, and put the result into s */

  221.     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);

  222.     sumdiffs = vec_splat(sumdiffs, 3);

  223.     vec_ste(sumdiffs, 0, &s);

  224. 

  225.     return s;

  226. }

  227. 

  228. int sad16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)

  229. {

  230.     int i;

  231.     int s;

  232.     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);

  233.     vector unsigned char perm1, perm2, *pix1v, *pix2v;

  234.     vector unsigned char t1, t2, t3,t4, t5;

  235.     vector unsigned int sad;

  236.     vector signed int sumdiffs;

  237. 

  238.     sad = (vector unsigned int)vec_splat_u32(0);

  239. 

  240. 

  241.     for (i = 0; i < h; i++) {

  242.         /* Read potentially unaligned pixels into t1 and t2 */

  243.         perm1 = vec_lvsl(0, pix1);

  244.         pix1v = (vector unsigned char *) pix1;

  245.         perm2 = vec_lvsl(0, pix2);

  246.         pix2v = (vector unsigned char *) pix2;

  247.         t1 = vec_perm(pix1v[0], pix1v[1], perm1);

  248.         t2 = vec_perm(pix2v[0], pix2v[1], perm2);

  249. 

  250.         /* Calculate a sum of abs differences vector */

  251.         t3 = vec_max(t1, t2);

  252.         t4 = vec_min(t1, t2);

  253.         t5 = vec_sub(t3, t4);

  254. 

  255.         /* Add each 4 pixel group together and put 4 results into sad */

  256.         sad = vec_sum4s(t5, sad);

  257. 

  258.         pix1 += line_size;

  259.         pix2 += line_size;

  260.     }

  261. 

  262.     /* Sum up the four partial sums, and put the result into s */

  263.     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);

  264.     sumdiffs = vec_splat(sumdiffs, 3);

  265.     vec_ste(sumdiffs, 0, &s);

  266. 

  267.     return s;

  268. }

  269. 

  270. int sad8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)

  271. {

  272.     int i;

  273.     int s;

  274.     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);

  275.     vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;

  276.     vector unsigned char t1, t2, t3,t4, t5;

  277.     vector unsigned int sad;

  278.     vector signed int sumdiffs;

  279. 

  280.     sad = (vector unsigned int)vec_splat_u32(0);

  281. 

  282.     permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};

  283. 

  284.     for (i = 0; i < h; i++) {

  285.         /* Read potentially unaligned pixels into t1 and t2

  286.            Since we're reading 16 pixels, and actually only want 8,

  287.            mask out the last 8 pixels. The 0s don't change the sum. */

  288.         perm1 = vec_lvsl(0, pix1);

  289.         pix1v = (vector unsigned char *) pix1;

  290.         perm2 = vec_lvsl(0, pix2);

  291.         pix2v = (vector unsigned char *) pix2;

  292.         t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);

  293.         t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);

  294. 

  295.         /* Calculate a sum of abs differences vector */

  296.         t3 = vec_max(t1, t2);

  297.         t4 = vec_min(t1, t2);

  298.         t5 = vec_sub(t3, t4);

  299. 

  300.         /* Add each 4 pixel group together and put 4 results into sad */

  301.         sad = vec_sum4s(t5, sad);

  302. 

  303.         pix1 += line_size;

  304.         pix2 += line_size;

  305.     }

  306. 

  307.     /* Sum up the four partial sums, and put the result into s */

  308.     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);

  309.     sumdiffs = vec_splat(sumdiffs, 3);

  310.     vec_ste(sumdiffs, 0, &s);

  311. 

  312.     return s;

  313. }

  314. 

  315. int pix_norm1_altivec(uint8_t *pix, int line_size)

  316. {

  317.     int i;

  318.     int s;

  319.     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);

  320.     vector unsigned char *tv;

  321.     vector unsigned char pixv;

  322.     vector unsigned int sv;

  323.     vector signed int sum;

  324. 

  325.     sv = (vector unsigned int)vec_splat_u32(0);

  326. 

  327.     s = 0;

  328.     for (i = 0; i < 16; i++) {

  329.         /* Read in the potentially unaligned pixels */

  330.         tv = (vector unsigned char *) pix;

  331.         pixv = vec_perm(tv[0], tv[1], vec_lvsl(0, pix));

  332. 

  333.         /* Square the values, and add them to our sum */

  334.         sv = vec_msum(pixv, pixv, sv);

  335. 

  336.         pix += line_size;

  337.     }

  338.     /* Sum up the four partial sums, and put the result into s */

  339.     sum = vec_sums((vector signed int) sv, (vector signed int) zero);

  340.     sum = vec_splat(sum, 3);

  341.     vec_ste(sum, 0, &s);

  342. 

  343.     return s;

  344. }

  345. 

  346. /**

  347.  * Sum of Squared Errors for a 8x8 block.

  348.  * AltiVec-enhanced.

  349.  * It's the sad8_altivec code above w/ squaring added.

  350.  */

  351. int sse8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)

  352. {

  353.     int i;

  354.     int s;

  355.     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);

  356.     vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;

  357.     vector unsigned char t1, t2, t3,t4, t5;

  358.     vector unsigned int sum;

  359.     vector signed int sumsqr;

  360. 

  361.     sum = (vector unsigned int)vec_splat_u32(0);

  362. 

  363.     permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};

  364. 

  365. 

  366.     for (i = 0; i < h; i++) {

  367.         /* Read potentially unaligned pixels into t1 and t2

  368.            Since we're reading 16 pixels, and actually only want 8,

  369.            mask out the last 8 pixels. The 0s don't change the sum. */

  370.         perm1 = vec_lvsl(0, pix1);

  371.         pix1v = (vector unsigned char *) pix1;

  372.         perm2 = vec_lvsl(0, pix2);

  373.         pix2v = (vector unsigned char *) pix2;

  374.         t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);

  375.         t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);

  376. 

  377.         /* Since we want to use unsigned chars, we can take advantage

  378.            of the fact that abs(a-b)^2 = (a-b)^2. */

  379. 

  380.         /* Calculate abs differences vector */

  381.         t3 = vec_max(t1, t2);

  382.         t4 = vec_min(t1, t2);

  383.         t5 = vec_sub(t3, t4);

  384. 

  385.         /* Square the values and add them to our sum */

  386.         sum = vec_msum(t5, t5, sum);

  387. 

  388.         pix1 += line_size;

  389.         pix2 += line_size;

  390.     }

  391. 

  392.     /* Sum up the four partial sums, and put the result into s */

  393.     sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);

  394.     sumsqr = vec_splat(sumsqr, 3);

  395.     vec_ste(sumsqr, 0, &s);

  396. 

  397.     return s;

  398. }

  399. 

  400. /**

  401.  * Sum of Squared Errors for a 16x16 block.

  402.  * AltiVec-enhanced.

  403.  * It's the sad16_altivec code above w/ squaring added.

  404.  */

  405. int sse16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)

  406. {

  407.     int i;

  408.     int s;

  409.     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);

  410.     vector unsigned char perm1, perm2, *pix1v, *pix2v;

  411.     vector unsigned char t1, t2, t3,t4, t5;

  412.     vector unsigned int sum;

  413.     vector signed int sumsqr;

  414. 

  415.     sum = (vector unsigned int)vec_splat_u32(0);

  416. 

  417.     for (i = 0; i < h; i++) {

  418.         /* Read potentially unaligned pixels into t1 and t2 */

  419.         perm1 = vec_lvsl(0, pix1);

  420.         pix1v = (vector unsigned char *) pix1;

  421.         perm2 = vec_lvsl(0, pix2);

  422.         pix2v = (vector unsigned char *) pix2;

  423.         t1 = vec_perm(pix1v[0], pix1v[1], perm1);

  424.         t2 = vec_perm(pix2v[0], pix2v[1], perm2);

  425. 

  426.         /* Since we want to use unsigned chars, we can take advantage

  427.            of the fact that abs(a-b)^2 = (a-b)^2. */

  428. 

  429.         /* Calculate abs differences vector */

  430.         t3 = vec_max(t1, t2);

  431.         t4 = vec_min(t1, t2);

  432.         t5 = vec_sub(t3, t4);

  433. 

  434.         /* Square the values and add them to our sum */

  435.         sum = vec_msum(t5, t5, sum);

  436. 

  437.         pix1 += line_size;

  438.         pix2 += line_size;

  439.     }

  440. 

  441.     /* Sum up the four partial sums, and put the result into s */

  442.     sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);

  443.     sumsqr = vec_splat(sumsqr, 3);

  444.     vec_ste(sumsqr, 0, &s);

  445. 

  446.     return s;

  447. }

  448. 

  449. int pix_sum_altivec(uint8_t * pix, int line_size)

  450. {

  451.     const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);

  452.     vector unsigned char perm, *pixv;

  453.     vector unsigned char t1;

  454.     vector unsigned int sad;

  455.     vector signed int sumdiffs;

  456. 

  457.     int i;

  458.     int s;

  459. 

  460.     sad = (vector unsigned int)vec_splat_u32(0);

  461. 

  462.     for (i = 0; i < 16; i++) {

  463.         /* Read the potentially unaligned 16 pixels into t1 */

  464.         perm = vec_lvsl(0, pix);

  465.         pixv = (vector unsigned char *) pix;

  466.         t1 = vec_perm(pixv[0], pixv[1], perm);

  467. 

  468.         /* Add each 4 pixel group together and put 4 results into sad */

  469.         sad = vec_sum4s(t1, sad);

  470. 

  471.         pix += line_size;

  472.     }

  473. 

  474.     /* Sum up the four partial sums, and put the result into s */

  475.     sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);

  476.     sumdiffs = vec_splat(sumdiffs, 3);

  477.     vec_ste(sumdiffs, 0, &s);

  478. 

  479.     return s;

  480. }

  481. 

  482. void get_pixels_altivec(DCTELEM *restrict block, const uint8_t *pixels, int line_size)

  483. {

  484.     int i;

  485.     vector unsigned char perm, bytes, *pixv;

  486.     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);

  487.     vector signed short shorts;

  488. 

  489.     for (i = 0; i < 8; i++) {

  490.         // Read potentially unaligned pixels.

  491.         // We're reading 16 pixels, and actually only want 8,

  492.         // but we simply ignore the extras.

  493.         perm = vec_lvsl(0, pixels);

  494.         pixv = (vector unsigned char *) pixels;

  495.         bytes = vec_perm(pixv[0], pixv[1], perm);

  496. 

  497.         // convert the bytes into shorts

  498.         shorts = (vector signed short)vec_mergeh(zero, bytes);

  499. 

  500.         // save the data to the block, we assume the block is 16-byte aligned

  501.         vec_st(shorts, i*16, (vector signed short*)block);

  502. 

  503.         pixels += line_size;

  504.     }

  505. }

  506. 

  507. void diff_pixels_altivec(DCTELEM *restrict block, const uint8_t *s1,

  508.         const uint8_t *s2, int stride)

  509. {

  510.     int i;

  511.     vector unsigned char perm, bytes, *pixv;

  512.     const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);

  513.     vector signed short shorts1, shorts2;

  514. 

  515.     for (i = 0; i < 4; i++) {

  516.         // Read potentially unaligned pixels

  517.         // We're reading 16 pixels, and actually only want 8,

  518.         // but we simply ignore the extras.

  519.         perm = vec_lvsl(0, s1);

  520.         pixv = (vector unsigned char *) s1;

  521.         bytes = vec_perm(pixv[0], pixv[1], perm);

  522. 

  523.         // convert the bytes into shorts

  524.         shorts1 = (vector signed short)vec_mergeh(zero, bytes);

  525. 

  526.         // Do the same for the second block of pixels

  527.         perm = vec_lvsl(0, s2);

  528.         pixv = (vector unsigned char *) s2;

  529.         bytes = vec_perm(pixv[0], pixv[1], perm);

  530. 

  531.         // convert the bytes into shorts

  532.         shorts2 = (vector signed short)vec_mergeh(zero, bytes);

  533. 

  534.         // Do the subtraction

  535.         shorts1 = vec_sub(shorts1, shorts2);

  536. 

  537.         // save the data to the block, we assume the block is 16-byte aligned

  538.         vec_st(shorts1, 0, (vector signed short*)block);

  539. 

  540.         s1 += stride;

  541.         s2 += stride;

  542.         block += 8;

  543. 

  544. 

  545.         // The code below is a copy of the code above... This is a manual

  546.         // unroll.

  547. 

  548.         // Read potentially unaligned pixels

  549.         // We're reading 16 pixels, and actually only want 8,

  550.         // but we simply ignore the extras.

  551.         perm = vec_lvsl(0, s1);

  552.         pixv = (vector unsigned char *) s1;

  553.         bytes = vec_perm(pixv[0], pixv[1], perm);

  554. 

  555.         // convert the bytes into shorts

  556.         shorts1 = (vector signed short)vec_mergeh(zero, bytes);

  557. 

  558.         // Do the same for the second block of pixels

  559.         perm = vec_lvsl(0, s2);

  560.         pixv = (vector unsigned char *) s2;

  561.         bytes = vec_perm(pixv[0], pixv[1], perm);

  562. 

  563.         // convert the bytes into shorts

  564.         shorts2 = (vector signed short)vec_mergeh(zero, bytes);

  565. 

  566.         // Do the subtraction

  567.         shorts1 = vec_sub(shorts1, shorts2);

  568. 

  569.         // save the data to the block, we assume the block is 16-byte aligned

  570.         vec_st(shorts1, 0, (vector signed short*)block);

  571. 

  572.         s1 += stride;

  573.         s2 += stride;

  574.         block += 8;

  575.     }

  576. }

  577. 

  578. 

  579. static void clear_block_altivec(DCTELEM *block) {

  580.     LOAD_ZERO;

  581.     vec_st(zero_s16v,   0, block);

  582.     vec_st(zero_s16v,  16, block);

  583.     vec_st(zero_s16v,  32, block);

  584.     vec_st(zero_s16v,  48, block);

  585.     vec_st(zero_s16v,  64, block);

  586.     vec_st(zero_s16v,  80, block);

  587.     vec_st(zero_s16v,  96, block);

  588.     vec_st(zero_s16v, 112, block);

  589. }

  590. 

  591. 

  592. void add_bytes_altivec(uint8_t *dst, uint8_t *src, int w) {

  593.     register int i;

  594.     register vector unsigned char vdst, vsrc;

  595. 

  596.     /* dst and src are 16 bytes-aligned (guaranteed) */

  597.     for (i = 0 ; (i + 15) < w ; i+=16) {

  598.         vdst = vec_ld(i, (unsigned char*)dst);

  599.         vsrc = vec_ld(i, (unsigned char*)src);

  600.         vdst = vec_add(vsrc, vdst);

  601.         vec_st(vdst, i, (unsigned char*)dst);

  602.     }

  603.     /* if w is not a multiple of 16 */

  604.     for (; (i < w) ; i++) {

  605.         dst[i] = src[i];

  606.     }

  607. }

  608. 

  609. /* next one assumes that ((line_size % 16) == 0) */

  610. void put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)

  611. {

  612. POWERPC_PERF_DECLARE(altivec_put_pixels16_num, 1);

  613.     register vector unsigned char pixelsv1, pixelsv2;

  614.     register vector unsigned char pixelsv1B, pixelsv2B;

  615.     register vector unsigned char pixelsv1C, pixelsv2C;

  616.     register vector unsigned char pixelsv1D, pixelsv2D;

  617. 

  618.     register vector unsigned char perm = vec_lvsl(0, pixels);

  619.     int i;

  620.     register int line_size_2 = line_size << 1;

  621.     register int line_size_3 = line_size + line_size_2;

  622.     register int line_size_4 = line_size << 2;

  623. 

  624. POWERPC_PERF_START_COUNT(altivec_put_pixels16_num, 1);

  625. // hand-unrolling the loop by 4 gains about 15%

  626. // mininum execution time goes from 74 to 60 cycles

  627. // it's faster than -funroll-loops, but using

  628. // -funroll-loops w/ this is bad - 74 cycles again.

  629. // all this is on a 7450, tuning for the 7450

  630. #if 0

  631.     for (i = 0; i < h; i++) {

  632.         pixelsv1 = vec_ld(0, pixels);

  633.         pixelsv2 = vec_ld(16, pixels);

  634.         vec_st(vec_perm(pixelsv1, pixelsv2, perm),

  635.                0, block);

  636.         pixels+=line_size;

  637.         block +=line_size;

  638.     }

  639. #else

  640.     for (i = 0; i < h; i += 4) {

  641.         pixelsv1  = vec_ld( 0, pixels);

  642.         pixelsv2  = vec_ld(15, pixels);

  643.         pixelsv1B = vec_ld(line_size, pixels);

  644.         pixelsv2B = vec_ld(15 + line_size, pixels);

  645.         pixelsv1C = vec_ld(line_size_2, pixels);

  646.         pixelsv2C = vec_ld(15 + line_size_2, pixels);

  647.         pixelsv1D = vec_ld(line_size_3, pixels);

  648.         pixelsv2D = vec_ld(15 + line_size_3, pixels);

  649.         vec_st(vec_perm(pixelsv1, pixelsv2, perm),

  650.                0, (unsigned char*)block);

  651.         vec_st(vec_perm(pixelsv1B, pixelsv2B, perm),

  652.                line_size, (unsigned char*)block);

  653.         vec_st(vec_perm(pixelsv1C, pixelsv2C, perm),

  654.                line_size_2, (unsigned char*)block);

  655.         vec_st(vec_perm(pixelsv1D, pixelsv2D, perm),

  656.                line_size_3, (unsigned char*)block);

  657.         pixels+=line_size_4;

  658.         block +=line_size_4;

  659.     }

  660. #endif

  661. POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_num, 1);

  662. }

  663. 

  664. /* next one assumes that ((line_size % 16) == 0) */

  665. #define op_avg(a,b)  a = ( ((a)|(b)) - ((((a)^(b))&0xFEFEFEFEUL)>>1) )

  666. void avg_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)

  667. {

  668. POWERPC_PERF_DECLARE(altivec_avg_pixels16_num, 1);

  669.     register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;

  670.     register vector unsigned char perm = vec_lvsl(0, pixels);

  671.     int i;

  672. 

  673. POWERPC_PERF_START_COUNT(altivec_avg_pixels16_num, 1);

  674. 

  675.     for (i = 0; i < h; i++) {

  676.         pixelsv1 = vec_ld( 0, pixels);

  677.         pixelsv2 = vec_ld(16,pixels);

  678.         blockv = vec_ld(0, block);

  679.         pixelsv = vec_perm(pixelsv1, pixelsv2, perm);

  680.         blockv = vec_avg(blockv,pixelsv);

  681.         vec_st(blockv, 0, (unsigned char*)block);

  682.         pixels+=line_size;

  683.         block +=line_size;

  684.     }

  685. 

  686. POWERPC_PERF_STOP_COUNT(altivec_avg_pixels16_num, 1);

  687. }

  688. 

  689. /* next one assumes that ((line_size % 8) == 0) */

  690. void avg_pixels8_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)

  691. {

  692. POWERPC_PERF_DECLARE(altivec_avg_pixels8_num, 1);

  693.     register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;

  694.     int i;

  695. 

  696. POWERPC_PERF_START_COUNT(altivec_avg_pixels8_num, 1);

  697. 

  698.    for (i = 0; i < h; i++) {

  699.        /* block is 8 bytes-aligned, so we're either in the

  700.           left block (16 bytes-aligned) or in the right block (not) */

  701.        int rightside = ((unsigned long)block & 0x0000000F);

  702. 

  703.        blockv = vec_ld(0, block);

  704.        pixelsv1 = vec_ld( 0, pixels);

  705.        pixelsv2 = vec_ld(16, pixels);

  706.        pixelsv = vec_perm(pixelsv1, pixelsv2, vec_lvsl(0, pixels));

  707. 

  708.        if (rightside) {

  709.            pixelsv = vec_perm(blockv, pixelsv, vcprm(0,1,s0,s1));

  710.        } else {

  711.            pixelsv = vec_perm(blockv, pixelsv, vcprm(s0,s1,2,3));

  712.        }

  713. 

  714.        blockv = vec_avg(blockv, pixelsv);

  715. 

  716.        vec_st(blockv, 0, block);

  717. 

  718.        pixels += line_size;

  719.        block += line_size;

  720.    }

  721. 

  722. POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_num, 1);

  723. }

  724. 

  725. /* next one assumes that ((line_size % 8) == 0) */

  726. void put_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)

  727. {

  728. POWERPC_PERF_DECLARE(altivec_put_pixels8_xy2_num, 1);

  729.     register int i;

  730.     register vector unsigned char pixelsv1, pixelsv2, pixelsavg;

  731.     register vector unsigned char blockv, temp1, temp2;

  732.     register vector unsigned short pixelssum1, pixelssum2, temp3;

  733.     register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);

  734.     register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);

  735. 

  736.     temp1 = vec_ld(0, pixels);

  737.     temp2 = vec_ld(16, pixels);

  738.     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));

  739.     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {

  740.         pixelsv2 = temp2;

  741.     } else {

  742.         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));

  743.     }

  744.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  745.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

  746.     pixelssum1 = vec_add((vector unsigned short)pixelsv1,

  747.                          (vector unsigned short)pixelsv2);

  748.     pixelssum1 = vec_add(pixelssum1, vctwo);

  749. 

  750. POWERPC_PERF_START_COUNT(altivec_put_pixels8_xy2_num, 1);

  751.     for (i = 0; i < h ; i++) {

  752.         int rightside = ((unsigned long)block & 0x0000000F);

  753.         blockv = vec_ld(0, block);

  754. 

  755.         temp1 = vec_ld(line_size, pixels);

  756.         temp2 = vec_ld(line_size + 16, pixels);

  757.         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));

  758.         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {

  759.             pixelsv2 = temp2;

  760.         } else {

  761.             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));

  762.         }

  763. 

  764.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  765.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

  766.         pixelssum2 = vec_add((vector unsigned short)pixelsv1,

  767.                              (vector unsigned short)pixelsv2);

  768.         temp3 = vec_add(pixelssum1, pixelssum2);

  769.         temp3 = vec_sra(temp3, vctwo);

  770.         pixelssum1 = vec_add(pixelssum2, vctwo);

  771.         pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);

  772. 

  773.         if (rightside) {

  774.             blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));

  775.         } else {

  776.             blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));

  777.         }

  778. 

  779.         vec_st(blockv, 0, block);

  780. 

  781.         block += line_size;

  782.         pixels += line_size;

  783.     }

  784. 

  785. POWERPC_PERF_STOP_COUNT(altivec_put_pixels8_xy2_num, 1);

  786. }

  787. 

  788. /* next one assumes that ((line_size % 8) == 0) */

  789. void put_no_rnd_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)

  790. {

  791. POWERPC_PERF_DECLARE(altivec_put_no_rnd_pixels8_xy2_num, 1);

  792.     register int i;

  793.     register vector unsigned char pixelsv1, pixelsv2, pixelsavg;

  794.     register vector unsigned char blockv, temp1, temp2;

  795.     register vector unsigned short pixelssum1, pixelssum2, temp3;

  796.     register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);

  797.     register const vector unsigned short vcone = (const vector unsigned short)vec_splat_u16(1);

  798.     register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);

  799. 

  800.     temp1 = vec_ld(0, pixels);

  801.     temp2 = vec_ld(16, pixels);

  802.     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));

  803.     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {

  804.         pixelsv2 = temp2;

  805.     } else {

  806.         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));

  807.     }

  808.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  809.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

  810.     pixelssum1 = vec_add((vector unsigned short)pixelsv1,

  811.                          (vector unsigned short)pixelsv2);

  812.     pixelssum1 = vec_add(pixelssum1, vcone);

  813. 

  814. POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);

  815.     for (i = 0; i < h ; i++) {

  816.         int rightside = ((unsigned long)block & 0x0000000F);

  817.         blockv = vec_ld(0, block);

  818. 

  819.         temp1 = vec_ld(line_size, pixels);

  820.         temp2 = vec_ld(line_size + 16, pixels);

  821.         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));

  822.         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {

  823.             pixelsv2 = temp2;

  824.         } else {

  825.             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));

  826.         }

  827. 

  828.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  829.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

  830.         pixelssum2 = vec_add((vector unsigned short)pixelsv1,

  831.                              (vector unsigned short)pixelsv2);

  832.         temp3 = vec_add(pixelssum1, pixelssum2);

  833.         temp3 = vec_sra(temp3, vctwo);

  834.         pixelssum1 = vec_add(pixelssum2, vcone);

  835.         pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);

  836. 

  837.         if (rightside) {

  838.             blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));

  839.         } else {

  840.             blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));

  841.         }

  842. 

  843.         vec_st(blockv, 0, block);

  844. 

  845.         block += line_size;

  846.         pixels += line_size;

  847.     }

  848. 

  849. POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);

  850. }

  851. 

  852. /* next one assumes that ((line_size % 16) == 0) */

  853. void put_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)

  854. {

  855. POWERPC_PERF_DECLARE(altivec_put_pixels16_xy2_num, 1);

  856.     register int i;

  857.     register vector unsigned char pixelsv1, pixelsv2, pixelsv3, pixelsv4;

  858.     register vector unsigned char blockv, temp1, temp2;

  859.     register vector unsigned short temp3, temp4,

  860.         pixelssum1, pixelssum2, pixelssum3, pixelssum4;

  861.     register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);

  862.     register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);

  863. 

  864. POWERPC_PERF_START_COUNT(altivec_put_pixels16_xy2_num, 1);

  865. 

  866.     temp1 = vec_ld(0, pixels);

  867.     temp2 = vec_ld(16, pixels);

  868.     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));

  869.     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {

  870.         pixelsv2 = temp2;

  871.     } else {

  872.         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));

  873.     }

  874.     pixelsv3 = vec_mergel(vczero, pixelsv1);

  875.     pixelsv4 = vec_mergel(vczero, pixelsv2);

  876.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  877.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

  878.     pixelssum3 = vec_add((vector unsigned short)pixelsv3,

  879.                          (vector unsigned short)pixelsv4);

  880.     pixelssum3 = vec_add(pixelssum3, vctwo);

  881.     pixelssum1 = vec_add((vector unsigned short)pixelsv1,

  882.                          (vector unsigned short)pixelsv2);

  883.     pixelssum1 = vec_add(pixelssum1, vctwo);

  884. 

  885.     for (i = 0; i < h ; i++) {

  886.         blockv = vec_ld(0, block);

  887. 

  888.         temp1 = vec_ld(line_size, pixels);

  889.         temp2 = vec_ld(line_size + 16, pixels);

  890.         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));

  891.         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {

  892.             pixelsv2 = temp2;

  893.         } else {

  894.             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));

  895.         }

  896. 

  897.         pixelsv3 = vec_mergel(vczero, pixelsv1);

  898.         pixelsv4 = vec_mergel(vczero, pixelsv2);

  899.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  900.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

  901. 

  902.         pixelssum4 = vec_add((vector unsigned short)pixelsv3,

  903.                              (vector unsigned short)pixelsv4);

  904.         pixelssum2 = vec_add((vector unsigned short)pixelsv1,

  905.                              (vector unsigned short)pixelsv2);

  906.         temp4 = vec_add(pixelssum3, pixelssum4);

  907.         temp4 = vec_sra(temp4, vctwo);

  908.         temp3 = vec_add(pixelssum1, pixelssum2);

  909.         temp3 = vec_sra(temp3, vctwo);

  910. 

  911.         pixelssum3 = vec_add(pixelssum4, vctwo);

  912.         pixelssum1 = vec_add(pixelssum2, vctwo);

  913. 

  914.         blockv = vec_packsu(temp3, temp4);

  915. 

  916.         vec_st(blockv, 0, block);

  917. 

  918.         block += line_size;

  919.         pixels += line_size;

  920.     }

  921. 

  922. POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_xy2_num, 1);

  923. }

  924. 

  925. /* next one assumes that ((line_size % 16) == 0) */

  926. void put_no_rnd_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)

  927. {

  928. POWERPC_PERF_DECLARE(altivec_put_no_rnd_pixels16_xy2_num, 1);

  929.     register int i;

  930.     register vector unsigned char pixelsv1, pixelsv2, pixelsv3, pixelsv4;

  931.     register vector unsigned char blockv, temp1, temp2;

  932.     register vector unsigned short temp3, temp4,

  933.         pixelssum1, pixelssum2, pixelssum3, pixelssum4;

  934.     register const vector unsigned char vczero = (const vector unsigned char)vec_splat_u8(0);

  935.     register const vector unsigned short vcone = (const vector unsigned short)vec_splat_u16(1);

  936.     register const vector unsigned short vctwo = (const vector unsigned short)vec_splat_u16(2);

  937. 

  938. POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);

  939. 

  940.     temp1 = vec_ld(0, pixels);

  941.     temp2 = vec_ld(16, pixels);

  942.     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));

  943.     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {

  944.         pixelsv2 = temp2;

  945.     } else {

  946.         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));

  947.     }

  948.     pixelsv3 = vec_mergel(vczero, pixelsv1);

  949.     pixelsv4 = vec_mergel(vczero, pixelsv2);

  950.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  951.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

  952.     pixelssum3 = vec_add((vector unsigned short)pixelsv3,

  953.                          (vector unsigned short)pixelsv4);

  954.     pixelssum3 = vec_add(pixelssum3, vcone);

  955.     pixelssum1 = vec_add((vector unsigned short)pixelsv1,

  956.                          (vector unsigned short)pixelsv2);

  957.     pixelssum1 = vec_add(pixelssum1, vcone);

  958. 

  959.     for (i = 0; i < h ; i++) {

  960.         blockv = vec_ld(0, block);

  961. 

  962.         temp1 = vec_ld(line_size, pixels);

  963.         temp2 = vec_ld(line_size + 16, pixels);

  964.         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));

  965.         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {

  966.             pixelsv2 = temp2;

  967.         } else {

  968.             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));

  969.         }

  970. 

  971.         pixelsv3 = vec_mergel(vczero, pixelsv1);

  972.         pixelsv4 = vec_mergel(vczero, pixelsv2);

  973.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  974.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

  975. 

  976.         pixelssum4 = vec_add((vector unsigned short)pixelsv3,

  977.                              (vector unsigned short)pixelsv4);

  978.         pixelssum2 = vec_add((vector unsigned short)pixelsv1,

  979.                              (vector unsigned short)pixelsv2);

  980.         temp4 = vec_add(pixelssum3, pixelssum4);

  981.         temp4 = vec_sra(temp4, vctwo);

  982.         temp3 = vec_add(pixelssum1, pixelssum2);

  983.         temp3 = vec_sra(temp3, vctwo);

  984. 

  985.         pixelssum3 = vec_add(pixelssum4, vcone);

  986.         pixelssum1 = vec_add(pixelssum2, vcone);

  987. 

  988.         blockv = vec_packsu(temp3, temp4);

  989. 

  990.         vec_st(blockv, 0, block);

  991. 

  992.         block += line_size;

  993.         pixels += line_size;

  994.     }

  995. 

  996. POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);

  997. }

  998. 

  999. int hadamard8_diff8x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){

  1000. POWERPC_PERF_DECLARE(altivec_hadamard8_diff8x8_num, 1);

  1001.     int sum;

  1002.     register const vector unsigned char vzero =

  1003.                             (const vector unsigned char)vec_splat_u8(0);

  1004.     register vector signed short temp0, temp1, temp2, temp3, temp4,

  1005.                                  temp5, temp6, temp7;

  1006. POWERPC_PERF_START_COUNT(altivec_hadamard8_diff8x8_num, 1);

  1007.     {

  1008.     register const vector signed short vprod1 =(const vector signed short)

  1009.                                                { 1,-1, 1,-1, 1,-1, 1,-1 };

  1010.     register const vector signed short vprod2 =(const vector signed short)

  1011.                                                { 1, 1,-1,-1, 1, 1,-1,-1 };

  1012.     register const vector signed short vprod3 =(const vector signed short)

  1013.                                                { 1, 1, 1, 1,-1,-1,-1,-1 };

  1014.     register const vector unsigned char perm1 = (const vector unsigned char)

  1015.         {0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,

  1016.          0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};

  1017.     register const vector unsigned char perm2 = (const vector unsigned char)

  1018.         {0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,

  1019.          0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};

  1020.     register const vector unsigned char perm3 = (const vector unsigned char)

  1021.         {0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,

  1022.          0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};

  1023. 

  1024. #define ONEITERBUTTERFLY(i, res)                                          \

  1025.     {                                                                     \

  1026.     register vector unsigned char src1, src2, srcO;                   \

  1027.     register vector unsigned char dst1, dst2, dstO;                   \

  1028.     register vector signed short srcV, dstV;                          \

  1029.     register vector signed short but0, but1, but2, op1, op2, op3;     \

  1030.     src1 = vec_ld(stride * i, src);                                   \

  1031.     src2 = vec_ld((stride * i) + 15, src);                            \

  1032.     srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src));           \

  1033.     dst1 = vec_ld(stride * i, dst);                                   \

  1034.     dst2 = vec_ld((stride * i) + 15, dst);                            \

  1035.     dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));           \

  1036.     /* promote the unsigned chars to signed shorts */                 \

  1037.     /* we're in the 8x8 function, we only care for the first 8 */     \

  1038.     srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \

  1039.            (vector signed char)srcO);                                 \

  1040.     dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \

  1041.            (vector signed char)dstO);                                 \

  1042.     /* subtractions inside the first butterfly */                     \

  1043.     but0 = vec_sub(srcV, dstV);                                       \

  1044.     op1  = vec_perm(but0, but0, perm1);                               \

  1045.     but1 = vec_mladd(but0, vprod1, op1);                              \

  1046.     op2  = vec_perm(but1, but1, perm2);                               \

  1047.     but2 = vec_mladd(but1, vprod2, op2);                              \

  1048.     op3  = vec_perm(but2, but2, perm3);                               \

  1049.     res  = vec_mladd(but2, vprod3, op3);                              \

  1050.     }

  1051.     ONEITERBUTTERFLY(0, temp0);

  1052.     ONEITERBUTTERFLY(1, temp1);

  1053.     ONEITERBUTTERFLY(2, temp2);

  1054.     ONEITERBUTTERFLY(3, temp3);

  1055.     ONEITERBUTTERFLY(4, temp4);

  1056.     ONEITERBUTTERFLY(5, temp5);

  1057.     ONEITERBUTTERFLY(6, temp6);

  1058.     ONEITERBUTTERFLY(7, temp7);

  1059.     }

  1060. #undef ONEITERBUTTERFLY

  1061.     {

  1062.     register vector signed int vsum;

  1063.     register vector signed short line0 = vec_add(temp0, temp1);

  1064.     register vector signed short line1 = vec_sub(temp0, temp1);

  1065.     register vector signed short line2 = vec_add(temp2, temp3);

  1066.     register vector signed short line3 = vec_sub(temp2, temp3);

  1067.     register vector signed short line4 = vec_add(temp4, temp5);

  1068.     register vector signed short line5 = vec_sub(temp4, temp5);

  1069.     register vector signed short line6 = vec_add(temp6, temp7);

  1070.     register vector signed short line7 = vec_sub(temp6, temp7);

  1071. 

  1072.     register vector signed short line0B = vec_add(line0, line2);

  1073.     register vector signed short line2B = vec_sub(line0, line2);

  1074.     register vector signed short line1B = vec_add(line1, line3);

  1075.     register vector signed short line3B = vec_sub(line1, line3);

  1076.     register vector signed short line4B = vec_add(line4, line6);

  1077.     register vector signed short line6B = vec_sub(line4, line6);

  1078.     register vector signed short line5B = vec_add(line5, line7);

  1079.     register vector signed short line7B = vec_sub(line5, line7);

  1080. 

  1081.     register vector signed short line0C = vec_add(line0B, line4B);

  1082.     register vector signed short line4C = vec_sub(line0B, line4B);

  1083.     register vector signed short line1C = vec_add(line1B, line5B);

  1084.     register vector signed short line5C = vec_sub(line1B, line5B);

  1085.     register vector signed short line2C = vec_add(line2B, line6B);

  1086.     register vector signed short line6C = vec_sub(line2B, line6B);

  1087.     register vector signed short line3C = vec_add(line3B, line7B);

  1088.     register vector signed short line7C = vec_sub(line3B, line7B);

  1089. 

  1090.     vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));

  1091.     vsum = vec_sum4s(vec_abs(line1C), vsum);

  1092.     vsum = vec_sum4s(vec_abs(line2C), vsum);

  1093.     vsum = vec_sum4s(vec_abs(line3C), vsum);

  1094.     vsum = vec_sum4s(vec_abs(line4C), vsum);

  1095.     vsum = vec_sum4s(vec_abs(line5C), vsum);

  1096.     vsum = vec_sum4s(vec_abs(line6C), vsum);

  1097.     vsum = vec_sum4s(vec_abs(line7C), vsum);

  1098.     vsum = vec_sums(vsum, (vector signed int)vzero);

  1099.     vsum = vec_splat(vsum, 3);

  1100.     vec_ste(vsum, 0, &sum);

  1101.     }

  1102. POWERPC_PERF_STOP_COUNT(altivec_hadamard8_diff8x8_num, 1);

  1103.     return sum;

  1104. }

  1105. 

  1106. /*

  1107. 16x8 works with 16 elements; it allows to avoid replicating loads, and

  1108. give the compiler more rooms for scheduling.  It's only used from

  1109. inside hadamard8_diff16_altivec.

  1110. 

  1111. Unfortunately, it seems gcc-3.3 is a bit dumb, and the compiled code has a LOT

  1112. of spill code, it seems gcc (unlike xlc) cannot keep everything in registers

  1113. by itself. The following code include hand-made registers allocation. It's not

  1114. clean, but on a 7450 the resulting code is much faster (best case fall from

  1115. 700+ cycles to 550).

  1116. 

  1117. xlc doesn't add spill code, but it doesn't know how to schedule for the 7450,

  1118. and its code isn't much faster than gcc-3.3 on the 7450 (but uses 25% less

  1119. instructions...)

  1120. 

  1121. On the 970, the hand-made RA is still a win (around 690 vs. around 780), but

  1122. xlc goes to around 660 on the regular C code...

  1123. */

  1124. 

  1125. static int hadamard8_diff16x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h) {

  1126.     int sum;

  1127.     register vector signed short

  1128.         temp0 __asm__ ("v0"),

  1129.         temp1 __asm__ ("v1"),

  1130.         temp2 __asm__ ("v2"),

  1131.         temp3 __asm__ ("v3"),

  1132.         temp4 __asm__ ("v4"),

  1133.         temp5 __asm__ ("v5"),

  1134.         temp6 __asm__ ("v6"),

  1135.         temp7 __asm__ ("v7");

  1136.     register vector signed short

  1137.         temp0S __asm__ ("v8"),

  1138.         temp1S __asm__ ("v9"),

  1139.         temp2S __asm__ ("v10"),

  1140.         temp3S __asm__ ("v11"),

  1141.         temp4S __asm__ ("v12"),

  1142.         temp5S __asm__ ("v13"),

  1143.         temp6S __asm__ ("v14"),

  1144.         temp7S __asm__ ("v15");

  1145.     register const vector unsigned char vzero __asm__ ("v31") =

  1146.         (const vector unsigned char)vec_splat_u8(0);

  1147.     {

  1148.     register const vector signed short vprod1 __asm__ ("v16") =

  1149.         (const vector signed short){ 1,-1, 1,-1, 1,-1, 1,-1 };

  1150.     register const vector signed short vprod2 __asm__ ("v17") =

  1151.         (const vector signed short){ 1, 1,-1,-1, 1, 1,-1,-1 };

  1152.     register const vector signed short vprod3 __asm__ ("v18") =

  1153.         (const vector signed short){ 1, 1, 1, 1,-1,-1,-1,-1 };

  1154.     register const vector unsigned char perm1 __asm__ ("v19") =

  1155.         (const vector unsigned char)

  1156.         {0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,

  1157.          0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};

  1158.     register const vector unsigned char perm2 __asm__ ("v20") =

  1159.         (const vector unsigned char)

  1160.         {0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,

  1161.          0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};

  1162.     register const vector unsigned char perm3 __asm__ ("v21") =

  1163.         (const vector unsigned char)

  1164.         {0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,

  1165.          0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};

  1166. 

  1167. #define ONEITERBUTTERFLY(i, res1, res2)                               \

  1168.     {                                                                 \

  1169.     register vector unsigned char src1 __asm__ ("v22"),               \

  1170.                                   src2 __asm__ ("v23"),               \

  1171.                                   dst1 __asm__ ("v24"),               \

  1172.                                   dst2 __asm__ ("v25"),               \

  1173.                                   srcO __asm__ ("v22"),               \

  1174.                                   dstO __asm__ ("v23");               \

  1175.                                                                       \

  1176.     register vector signed short  srcV  __asm__ ("v24"),              \

  1177.                                   dstV  __asm__ ("v25"),              \

  1178.                                   srcW  __asm__ ("v26"),              \

  1179.                                   dstW  __asm__ ("v27"),              \

  1180.                                   but0  __asm__ ("v28"),              \

  1181.                                   but0S __asm__ ("v29"),              \

  1182.                                   op1   __asm__ ("v30"),              \

  1183.                                   but1  __asm__ ("v22"),              \

  1184.                                   op1S  __asm__ ("v23"),              \

  1185.                                   but1S __asm__ ("v24"),              \

  1186.                                   op2   __asm__ ("v25"),              \

  1187.                                   but2  __asm__ ("v26"),              \

  1188.                                   op2S  __asm__ ("v27"),              \

  1189.                                   but2S __asm__ ("v28"),              \

  1190.                                   op3   __asm__ ("v29"),              \

  1191.                                   op3S  __asm__ ("v30");              \

  1192.                                                                       \

  1193.     src1 = vec_ld(stride * i, src);                                   \

  1194.     src2 = vec_ld((stride * i) + 16, src);                            \

  1195.     srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src));           \

  1196.     dst1 = vec_ld(stride * i, dst);                                   \

  1197.     dst2 = vec_ld((stride * i) + 16, dst);                            \

  1198.     dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));           \

  1199.     /* promote the unsigned chars to signed shorts */                 \

  1200.     srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \

  1201.            (vector signed char)srcO);                                 \

  1202.     dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \

  1203.            (vector signed char)dstO);                                 \

  1204.     srcW = (vector signed short)vec_mergel((vector signed char)vzero, \

  1205.            (vector signed char)srcO);                                 \

  1206.     dstW = (vector signed short)vec_mergel((vector signed char)vzero, \

  1207.            (vector signed char)dstO);                                 \

  1208.     /* subtractions inside the first butterfly */                     \

  1209.     but0 = vec_sub(srcV, dstV);                                       \

  1210.     but0S = vec_sub(srcW, dstW);                                      \

  1211.     op1 = vec_perm(but0, but0, perm1);                                \

  1212.     but1 = vec_mladd(but0, vprod1, op1);                              \

  1213.     op1S = vec_perm(but0S, but0S, perm1);                             \

  1214.     but1S = vec_mladd(but0S, vprod1, op1S);                           \

  1215.     op2 = vec_perm(but1, but1, perm2);                                \

  1216.     but2 = vec_mladd(but1, vprod2, op2);                              \

  1217.     op2S = vec_perm(but1S, but1S, perm2);                             \

  1218.     but2S = vec_mladd(but1S, vprod2, op2S);                           \

  1219.     op3 = vec_perm(but2, but2, perm3);                                \

  1220.     res1 = vec_mladd(but2, vprod3, op3);                              \

  1221.     op3S = vec_perm(but2S, but2S, perm3);                             \

  1222.     res2 = vec_mladd(but2S, vprod3, op3S);                            \

  1223.     }

  1224.     ONEITERBUTTERFLY(0, temp0, temp0S);

  1225.     ONEITERBUTTERFLY(1, temp1, temp1S);

  1226.     ONEITERBUTTERFLY(2, temp2, temp2S);

  1227.     ONEITERBUTTERFLY(3, temp3, temp3S);

  1228.     ONEITERBUTTERFLY(4, temp4, temp4S);

  1229.     ONEITERBUTTERFLY(5, temp5, temp5S);

  1230.     ONEITERBUTTERFLY(6, temp6, temp6S);

  1231.     ONEITERBUTTERFLY(7, temp7, temp7S);

  1232.     }

  1233. #undef ONEITERBUTTERFLY

  1234.     {

  1235.     register vector signed int vsum;

  1236.     register vector signed short line0S, line1S, line2S, line3S, line4S,

  1237.                                  line5S, line6S, line7S, line0BS,line2BS,

  1238.                                  line1BS,line3BS,line4BS,line6BS,line5BS,

  1239.                                  line7BS,line0CS,line4CS,line1CS,line5CS,

  1240.                                  line2CS,line6CS,line3CS,line7CS;

  1241. 

  1242.     register vector signed short line0 = vec_add(temp0, temp1);

  1243.     register vector signed short line1 = vec_sub(temp0, temp1);

  1244.     register vector signed short line2 = vec_add(temp2, temp3);

  1245.     register vector signed short line3 = vec_sub(temp2, temp3);

  1246.     register vector signed short line4 = vec_add(temp4, temp5);

  1247.     register vector signed short line5 = vec_sub(temp4, temp5);

  1248.     register vector signed short line6 = vec_add(temp6, temp7);

  1249.     register vector signed short line7 = vec_sub(temp6, temp7);

  1250. 

  1251.     register vector signed short line0B = vec_add(line0, line2);

  1252.     register vector signed short line2B = vec_sub(line0, line2);

  1253.     register vector signed short line1B = vec_add(line1, line3);

  1254.     register vector signed short line3B = vec_sub(line1, line3);

  1255.     register vector signed short line4B = vec_add(line4, line6);

  1256.     register vector signed short line6B = vec_sub(line4, line6);

  1257.     register vector signed short line5B = vec_add(line5, line7);

  1258.     register vector signed short line7B = vec_sub(line5, line7);

  1259. 

  1260.     register vector signed short line0C = vec_add(line0B, line4B);

  1261.     register vector signed short line4C = vec_sub(line0B, line4B);

  1262.     register vector signed short line1C = vec_add(line1B, line5B);

  1263.     register vector signed short line5C = vec_sub(line1B, line5B);

  1264.     register vector signed short line2C = vec_add(line2B, line6B);

  1265.     register vector signed short line6C = vec_sub(line2B, line6B);

  1266.     register vector signed short line3C = vec_add(line3B, line7B);

  1267.     register vector signed short line7C = vec_sub(line3B, line7B);

  1268. 

  1269.     vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));

  1270.     vsum = vec_sum4s(vec_abs(line1C), vsum);

  1271.     vsum = vec_sum4s(vec_abs(line2C), vsum);

  1272.     vsum = vec_sum4s(vec_abs(line3C), vsum);

  1273.     vsum = vec_sum4s(vec_abs(line4C), vsum);

  1274.     vsum = vec_sum4s(vec_abs(line5C), vsum);

  1275.     vsum = vec_sum4s(vec_abs(line6C), vsum);

  1276.     vsum = vec_sum4s(vec_abs(line7C), vsum);

  1277. 

  1278.     line0S = vec_add(temp0S, temp1S);

  1279.     line1S = vec_sub(temp0S, temp1S);

  1280.     line2S = vec_add(temp2S, temp3S);

  1281.     line3S = vec_sub(temp2S, temp3S);

  1282.     line4S = vec_add(temp4S, temp5S);

  1283.     line5S = vec_sub(temp4S, temp5S);

  1284.     line6S = vec_add(temp6S, temp7S);

  1285.     line7S = vec_sub(temp6S, temp7S);

  1286. 

  1287.     line0BS = vec_add(line0S, line2S);

  1288.     line2BS = vec_sub(line0S, line2S);

  1289.     line1BS = vec_add(line1S, line3S);

  1290.     line3BS = vec_sub(line1S, line3S);

  1291.     line4BS = vec_add(line4S, line6S);

  1292.     line6BS = vec_sub(line4S, line6S);

  1293.     line5BS = vec_add(line5S, line7S);

  1294.     line7BS = vec_sub(line5S, line7S);

  1295. 

  1296.     line0CS = vec_add(line0BS, line4BS);

  1297.     line4CS = vec_sub(line0BS, line4BS);

  1298.     line1CS = vec_add(line1BS, line5BS);

  1299.     line5CS = vec_sub(line1BS, line5BS);

  1300.     line2CS = vec_add(line2BS, line6BS);

  1301.     line6CS = vec_sub(line2BS, line6BS);

  1302.     line3CS = vec_add(line3BS, line7BS);

  1303.     line7CS = vec_sub(line3BS, line7BS);

  1304. 

  1305.     vsum = vec_sum4s(vec_abs(line0CS), vsum);

  1306.     vsum = vec_sum4s(vec_abs(line1CS), vsum);

  1307.     vsum = vec_sum4s(vec_abs(line2CS), vsum);

  1308.     vsum = vec_sum4s(vec_abs(line3CS), vsum);

  1309.     vsum = vec_sum4s(vec_abs(line4CS), vsum);

  1310.     vsum = vec_sum4s(vec_abs(line5CS), vsum);

  1311.     vsum = vec_sum4s(vec_abs(line6CS), vsum);

  1312.     vsum = vec_sum4s(vec_abs(line7CS), vsum);

  1313.     vsum = vec_sums(vsum, (vector signed int)vzero);

  1314.     vsum = vec_splat(vsum, 3);

  1315.     vec_ste(vsum, 0, &sum);

  1316.     }

  1317.     return sum;

  1318. }

  1319. 

  1320. int hadamard8_diff16_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){

  1321. POWERPC_PERF_DECLARE(altivec_hadamard8_diff16_num, 1);

  1322.     int score;

  1323. POWERPC_PERF_START_COUNT(altivec_hadamard8_diff16_num, 1);

  1324.     score = hadamard8_diff16x8_altivec(s, dst, src, stride, 8);

  1325.     if (h==16) {

  1326.         dst += 8*stride;

  1327.         src += 8*stride;

  1328.         score += hadamard8_diff16x8_altivec(s, dst, src, stride, 8);

  1329.     }

  1330. POWERPC_PERF_STOP_COUNT(altivec_hadamard8_diff16_num, 1);

  1331.     return score;

  1332. }

  1333. 

  1334. static void vorbis_inverse_coupling_altivec(float *mag, float *ang,

  1335.                                             int blocksize)

  1336. {

  1337.     int i;

  1338.     vector float m, a;

  1339.     vector bool int t0, t1;

  1340.     const vector unsigned int v_31 = //XXX

  1341.         vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));

  1342.     for (i = 0; i < blocksize; i += 4) {

  1343.         m = vec_ld(0, mag+i);

  1344.         a = vec_ld(0, ang+i);

  1345.         t0 = vec_cmple(m, (vector float)vec_splat_u32(0));

  1346.         t1 = vec_cmple(a, (vector float)vec_splat_u32(0));

  1347.         a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));

  1348.         t0 = (vector bool int)vec_and(a, t1);

  1349.         t1 = (vector bool int)vec_andc(a, t1);

  1350.         a = vec_sub(m, (vector float)t1);

  1351.         m = vec_add(m, (vector float)t0);

  1352.         vec_stl(a, 0, ang+i);

  1353.         vec_stl(m, 0, mag+i);

  1354.     }

  1355. }

  1356. 

  1357. /* next one assumes that ((line_size % 8) == 0) */

  1358. void avg_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)

  1359. {

  1360. POWERPC_PERF_DECLARE(altivec_avg_pixels8_xy2_num, 1);

  1361.     register int i;

  1362.     register vector unsigned char pixelsv1, pixelsv2, pixelsavg;

  1363.     register vector unsigned char blockv, temp1, temp2, blocktemp;

  1364.     register vector unsigned short pixelssum1, pixelssum2, temp3;

  1365. 

  1366.     register const vector unsigned char vczero = (const vector unsigned char)

  1367.                                         vec_splat_u8(0);

  1368.     register const vector unsigned short vctwo = (const vector unsigned short)

  1369.                                         vec_splat_u16(2);

  1370. 

  1371.     temp1 = vec_ld(0, pixels);

  1372.     temp2 = vec_ld(16, pixels);

  1373.     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));

  1374.     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {

  1375.         pixelsv2 = temp2;

  1376.     } else {

  1377.         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));

  1378.     }

  1379.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  1380.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

  1381.     pixelssum1 = vec_add((vector unsigned short)pixelsv1,

  1382.                          (vector unsigned short)pixelsv2);

  1383.     pixelssum1 = vec_add(pixelssum1, vctwo);

  1384. 

  1385. POWERPC_PERF_START_COUNT(altivec_avg_pixels8_xy2_num, 1);

  1386.     for (i = 0; i < h ; i++) {

  1387.         int rightside = ((unsigned long)block & 0x0000000F);

  1388.         blockv = vec_ld(0, block);

  1389. 

  1390.         temp1 = vec_ld(line_size, pixels);

  1391.         temp2 = vec_ld(line_size + 16, pixels);

  1392.         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));

  1393.         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {

  1394.             pixelsv2 = temp2;

  1395.         } else {

  1396.             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));

  1397.         }

  1398. 

  1399.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  1400.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

  1401.         pixelssum2 = vec_add((vector unsigned short)pixelsv1,

  1402.                              (vector unsigned short)pixelsv2);

  1403.         temp3 = vec_add(pixelssum1, pixelssum2);

  1404.         temp3 = vec_sra(temp3, vctwo);

  1405.         pixelssum1 = vec_add(pixelssum2, vctwo);

  1406.         pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);

  1407. 

  1408.         if (rightside) {

  1409.             blocktemp = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));

  1410.         } else {

  1411.             blocktemp = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));

  1412.         }

  1413. 

  1414.         blockv = vec_avg(blocktemp, blockv);

  1415.         vec_st(blockv, 0, block);

  1416. 

  1417.         block += line_size;

  1418.         pixels += line_size;

  1419.     }

  1420. 

  1421. POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_xy2_num, 1);

  1422. }

  1423. 

  1424. void dsputil_init_altivec(DSPContext* c, AVCodecContext *avctx)

  1425. {

  1426.     c->pix_abs[0][1] = sad16_x2_altivec;

  1427.     c->pix_abs[0][2] = sad16_y2_altivec;

  1428.     c->pix_abs[0][3] = sad16_xy2_altivec;

  1429.     c->pix_abs[0][0] = sad16_altivec;

  1430.     c->pix_abs[1][0] = sad8_altivec;

  1431.     c->sad[0]= sad16_altivec;

  1432.     c->sad[1]= sad8_altivec;

  1433.     c->pix_norm1 = pix_norm1_altivec;

  1434.     c->sse[1]= sse8_altivec;

  1435.     c->sse[0]= sse16_altivec;

  1436.     c->pix_sum = pix_sum_altivec;

  1437.     c->diff_pixels = diff_pixels_altivec;

  1438.     c->get_pixels = get_pixels_altivec;

  1439.     c->clear_block = clear_block_altivec;

  1440.     c->add_bytes= add_bytes_altivec;

  1441.     c->put_pixels_tab[0][0] = put_pixels16_altivec;

  1442.     /* the two functions do the same thing, so use the same code */

  1443.     c->put_no_rnd_pixels_tab[0][0] = put_pixels16_altivec;

  1444.     c->avg_pixels_tab[0][0] = avg_pixels16_altivec;

  1445.     c->avg_pixels_tab[1][0] = avg_pixels8_altivec;

  1446.     c->avg_pixels_tab[1][3] = avg_pixels8_xy2_altivec;

  1447.     c->put_pixels_tab[1][3] = put_pixels8_xy2_altivec;

  1448.     c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_altivec;

  1449.     c->put_pixels_tab[0][3] = put_pixels16_xy2_altivec;

  1450.     c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_altivec;

  1451. 

  1452.     c->hadamard8_diff[0] = hadamard8_diff16_altivec;

  1453.     c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;

  1454.     if (CONFIG_VORBIS_DECODER)

  1455.         c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;

  1456. }