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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. #include "dsputil_altivec.h"

  32. 

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

  34. {

  35.     int i;

  36.     int s;

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

  38.     vector unsigned char *tv;

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

  40.     vector unsigned int sad;

  41.     vector signed int sumdiffs;

  42. 

  43.     s = 0;

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

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

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

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

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

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

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

  51. 

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

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

  54. 

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

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

  57. 

  58.         /* Calculate the average vector */

  59.         avgv = vec_avg(pix2v, pix2iv);

  60. 

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

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

  63. 

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

  65.         sad = vec_sum4s(t5, sad);

  66. 

  67.         pix1 += line_size;

  68.         pix2 += line_size;

  69.     }

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

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

  72.     sumdiffs = vec_splat(sumdiffs, 3);

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

  74. 

  75.     return s;

  76. }

  77. 

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

  79. {

  80.     int i;

  81.     int s;

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

  83.     vector unsigned char *tv;

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

  85.     vector unsigned int sad;

  86.     vector signed int sumdiffs;

  87.     uint8_t *pix3 = pix2 + line_size;

  88. 

  89.     s = 0;

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

  91. 

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

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

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

  95.        time around the loop.

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

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

  98.        Split the pixel vectors into shorts */

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

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

  101. 

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

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

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

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

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

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

  108. 

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

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

  111. 

  112.         /* Calculate the average vector */

  113.         avgv = vec_avg(pix2v, pix3v);

  114. 

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

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

  117. 

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

  119.         sad = vec_sum4s(t5, sad);

  120. 

  121.         pix1 += line_size;

  122.         pix2v = pix3v;

  123.         pix3 += line_size;

  124. 

  125.     }

  126. 

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

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

  129.     sumdiffs = vec_splat(sumdiffs, 3);

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

  131.     return s;

  132. }

  133. 

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

  135. {

  136.     int i;

  137.     int s;

  138.     uint8_t *pix3 = pix2 + line_size;

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

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

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

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

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

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

  145.     vector unsigned short avghv, avglv;

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

  147.     vector unsigned int sad;

  148.     vector signed int sumdiffs;

  149. 

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

  151. 

  152.     s = 0;

  153. 

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

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

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

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

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

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

  160.        Split the pixel vectors into shorts */

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

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

  163. 

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

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

  166. 

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

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

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

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

  171.     t1 = vec_add(pix2hv, pix2ihv);

  172.     t2 = vec_add(pix2lv, pix2ilv);

  173. 

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

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

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

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

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

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

  180. 

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

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

  183. 

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

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

  186. 

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

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

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

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

  191.            and do the averaging by hand. */

  192. 

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

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

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

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

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

  198. 

  199.         /* Do the averaging on them */

  200.         t3 = vec_add(pix3hv, pix3ihv);

  201.         t4 = vec_add(pix3lv, pix3ilv);

  202. 

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

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

  205. 

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

  207.         avgv = vec_pack(avghv, avglv);

  208. 

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

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

  211. 

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

  213.         sad = vec_sum4s(t5, sad);

  214. 

  215.         pix1 += line_size;

  216.         pix3 += line_size;

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

  218.         t1 = t3;

  219.         t2 = t4;

  220.     }

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

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

  223.     sumdiffs = vec_splat(sumdiffs, 3);

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

  225. 

  226.     return s;

  227. }

  228. 

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

  230. {

  231.     int i;

  232.     int s;

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

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

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

  236.     vector unsigned int sad;

  237.     vector signed int sumdiffs;

  238. 

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

  240. 

  241. 

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

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

  244.         perm1 = vec_lvsl(0, pix1);

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

  246.         perm2 = vec_lvsl(0, pix2);

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

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

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

  250. 

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

  252.         t3 = vec_max(t1, t2);

  253.         t4 = vec_min(t1, t2);

  254.         t5 = vec_sub(t3, t4);

  255. 

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

  257.         sad = vec_sum4s(t5, sad);

  258. 

  259.         pix1 += line_size;

  260.         pix2 += line_size;

  261.     }

  262. 

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

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

  265.     sumdiffs = vec_splat(sumdiffs, 3);

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

  267. 

  268.     return s;

  269. }

  270. 

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

  272. {

  273.     int i;

  274.     int s;

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

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

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

  278.     vector unsigned int sad;

  279.     vector signed int sumdiffs;

  280. 

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

  282. 

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

  284. 

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

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

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

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

  289.         perm1 = vec_lvsl(0, pix1);

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

  291.         perm2 = vec_lvsl(0, pix2);

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

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

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

  295. 

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

  297.         t3 = vec_max(t1, t2);

  298.         t4 = vec_min(t1, t2);

  299.         t5 = vec_sub(t3, t4);

  300. 

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

  302.         sad = vec_sum4s(t5, sad);

  303. 

  304.         pix1 += line_size;

  305.         pix2 += line_size;

  306.     }

  307. 

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

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

  310.     sumdiffs = vec_splat(sumdiffs, 3);

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

  312. 

  313.     return s;

  314. }

  315. 

  316. static int pix_norm1_altivec(uint8_t *pix, int line_size)

  317. {

  318.     int i;

  319.     int s;

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

  321.     vector unsigned char *tv;

  322.     vector unsigned char pixv;

  323.     vector unsigned int sv;

  324.     vector signed int sum;

  325. 

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

  327. 

  328.     s = 0;

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

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

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

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

  333. 

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

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

  336. 

  337.         pix += line_size;

  338.     }

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

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

  341.     sum = vec_splat(sum, 3);

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

  343. 

  344.     return s;

  345. }

  346. 

  347. /**

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

  349.  * AltiVec-enhanced.

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

  351.  */

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

  353. {

  354.     int i;

  355.     int s;

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

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

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

  359.     vector unsigned int sum;

  360.     vector signed int sumsqr;

  361. 

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

  363. 

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

  365. 

  366. 

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

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

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

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

  371.         perm1 = vec_lvsl(0, pix1);

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

  373.         perm2 = vec_lvsl(0, pix2);

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

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

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

  377. 

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

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

  380. 

  381.         /* Calculate abs differences vector */

  382.         t3 = vec_max(t1, t2);

  383.         t4 = vec_min(t1, t2);

  384.         t5 = vec_sub(t3, t4);

  385. 

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

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

  388. 

  389.         pix1 += line_size;

  390.         pix2 += line_size;

  391.     }

  392. 

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

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

  395.     sumsqr = vec_splat(sumsqr, 3);

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

  397. 

  398.     return s;

  399. }

  400. 

  401. /**

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

  403.  * AltiVec-enhanced.

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

  405.  */

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

  407. {

  408.     int i;

  409.     int s;

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

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

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

  413.     vector unsigned int sum;

  414.     vector signed int sumsqr;

  415. 

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

  417. 

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

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

  420.         perm1 = vec_lvsl(0, pix1);

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

  422.         perm2 = vec_lvsl(0, pix2);

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

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

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

  426. 

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

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

  429. 

  430.         /* Calculate abs differences vector */

  431.         t3 = vec_max(t1, t2);

  432.         t4 = vec_min(t1, t2);

  433.         t5 = vec_sub(t3, t4);

  434. 

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

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

  437. 

  438.         pix1 += line_size;

  439.         pix2 += line_size;

  440.     }

  441. 

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

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

  444.     sumsqr = vec_splat(sumsqr, 3);

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

  446. 

  447.     return s;

  448. }

  449. 

  450. static int pix_sum_altivec(uint8_t * pix, int line_size)

  451. {

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

  453.     vector unsigned char perm, *pixv;

  454.     vector unsigned char t1;

  455.     vector unsigned int sad;

  456.     vector signed int sumdiffs;

  457. 

  458.     int i;

  459.     int s;

  460. 

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

  462. 

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

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

  465.         perm = vec_lvsl(0, pix);

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

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

  468. 

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

  470.         sad = vec_sum4s(t1, sad);

  471. 

  472.         pix += line_size;

  473.     }

  474. 

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

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

  477.     sumdiffs = vec_splat(sumdiffs, 3);

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

  479. 

  480.     return s;

  481. }

  482. 

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

  484. {

  485.     int i;

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

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

  488.     vector signed short shorts;

  489. 

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

  491.         // Read potentially unaligned pixels.

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

  493.         // but we simply ignore the extras.

  494.         perm = vec_lvsl(0, pixels);

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

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

  497. 

  498.         // convert the bytes into shorts

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

  500. 

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

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

  503. 

  504.         pixels += line_size;

  505.     }

  506. }

  507. 

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

  509.         const uint8_t *s2, int stride)

  510. {

  511.     int i;

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

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

  514.     vector signed short shorts1, shorts2;

  515. 

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

  517.         // Read potentially unaligned pixels

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

  519.         // but we simply ignore the extras.

  520.         perm = vec_lvsl(0, s1);

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

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

  523. 

  524.         // convert the bytes into shorts

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

  526. 

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

  528.         perm = vec_lvsl(0, s2);

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

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

  531. 

  532.         // convert the bytes into shorts

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

  534. 

  535.         // Do the subtraction

  536.         shorts1 = vec_sub(shorts1, shorts2);

  537. 

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

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

  540. 

  541.         s1 += stride;

  542.         s2 += stride;

  543.         block += 8;

  544. 

  545. 

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

  547.         // unroll.

  548. 

  549.         // Read potentially unaligned pixels

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

  551.         // but we simply ignore the extras.

  552.         perm = vec_lvsl(0, s1);

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

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

  555. 

  556.         // convert the bytes into shorts

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

  558. 

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

  560.         perm = vec_lvsl(0, s2);

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

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

  563. 

  564.         // convert the bytes into shorts

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

  566. 

  567.         // Do the subtraction

  568.         shorts1 = vec_sub(shorts1, shorts2);

  569. 

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

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

  572. 

  573.         s1 += stride;

  574.         s2 += stride;

  575.         block += 8;

  576.     }

  577. }

  578. 

  579. 

  580. static void clear_block_altivec(DCTELEM *block) {

  581.     LOAD_ZERO;

  582.     vec_st(zero_s16v,   0, block);

  583.     vec_st(zero_s16v,  16, block);

  584.     vec_st(zero_s16v,  32, block);

  585.     vec_st(zero_s16v,  48, block);

  586.     vec_st(zero_s16v,  64, block);

  587.     vec_st(zero_s16v,  80, block);

  588.     vec_st(zero_s16v,  96, block);

  589.     vec_st(zero_s16v, 112, block);

  590. }

  591. 

  592. 

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

  594.     register int i;

  595.     register vector unsigned char vdst, vsrc;

  596. 

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

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

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

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

  601.         vdst = vec_add(vsrc, vdst);

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

  603.     }

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

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

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

  607.     }

  608. }

  609. 

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

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

  612. {

  613. POWERPC_PERF_DECLARE(altivec_put_pixels16_num, 1);

  614.     register vector unsigned char pixelsv1, pixelsv2;

  615.     register vector unsigned char pixelsv1B, pixelsv2B;

  616.     register vector unsigned char pixelsv1C, pixelsv2C;

  617.     register vector unsigned char pixelsv1D, pixelsv2D;

  618. 

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

  620.     int i;

  621.     register int line_size_2 = line_size << 1;

  622.     register int line_size_3 = line_size + line_size_2;

  623.     register int line_size_4 = line_size << 2;

  624. 

  625. POWERPC_PERF_START_COUNT(altivec_put_pixels16_num, 1);

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

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

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

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

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

  631. #if 0

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

  633.         pixelsv1 = vec_ld(0, pixels);

  634.         pixelsv2 = vec_ld(16, pixels);

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

  636.                0, block);

  637.         pixels+=line_size;

  638.         block +=line_size;

  639.     }

  640. #else

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

  642.         pixelsv1  = vec_ld( 0, pixels);

  643.         pixelsv2  = vec_ld(15, pixels);

  644.         pixelsv1B = vec_ld(line_size, pixels);

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

  646.         pixelsv1C = vec_ld(line_size_2, pixels);

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

  648.         pixelsv1D = vec_ld(line_size_3, pixels);

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

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

  651.                0, (unsigned char*)block);

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

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

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

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

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

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

  658.         pixels+=line_size_4;

  659.         block +=line_size_4;

  660.     }

  661. #endif

  662. POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_num, 1);

  663. }

  664. 

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

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

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

  668. {

  669. POWERPC_PERF_DECLARE(altivec_avg_pixels16_num, 1);

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

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

  672.     int i;

  673. 

  674. POWERPC_PERF_START_COUNT(altivec_avg_pixels16_num, 1);

  675. 

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

  677.         pixelsv1 = vec_ld( 0, pixels);

  678.         pixelsv2 = vec_ld(16,pixels);

  679.         blockv = vec_ld(0, block);

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

  681.         blockv = vec_avg(blockv,pixelsv);

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

  683.         pixels+=line_size;

  684.         block +=line_size;

  685.     }

  686. 

  687. POWERPC_PERF_STOP_COUNT(altivec_avg_pixels16_num, 1);

  688. }

  689. 

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

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

  692. {

  693. POWERPC_PERF_DECLARE(altivec_avg_pixels8_num, 1);

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

  695.     int i;

  696. 

  697. POWERPC_PERF_START_COUNT(altivec_avg_pixels8_num, 1);

  698. 

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

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

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

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

  703. 

  704.        blockv = vec_ld(0, block);

  705.        pixelsv1 = vec_ld( 0, pixels);

  706.        pixelsv2 = vec_ld(16, pixels);

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

  708. 

  709.        if (rightside) {

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

  711.        } else {

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

  713.        }

  714. 

  715.        blockv = vec_avg(blockv, pixelsv);

  716. 

  717.        vec_st(blockv, 0, block);

  718. 

  719.        pixels += line_size;

  720.        block += line_size;

  721.    }

  722. 

  723. POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_num, 1);

  724. }

  725. 

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

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

  728. {

  729. POWERPC_PERF_DECLARE(altivec_put_pixels8_xy2_num, 1);

  730.     register int i;

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

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

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

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

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

  736. 

  737.     temp1 = vec_ld(0, pixels);

  738.     temp2 = vec_ld(16, pixels);

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

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

  741.         pixelsv2 = temp2;

  742.     } else {

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

  744.     }

  745.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  746.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

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

  748.                          (vector unsigned short)pixelsv2);

  749.     pixelssum1 = vec_add(pixelssum1, vctwo);

  750. 

  751. POWERPC_PERF_START_COUNT(altivec_put_pixels8_xy2_num, 1);

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

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

  754.         blockv = vec_ld(0, block);

  755. 

  756.         temp1 = vec_ld(line_size, pixels);

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

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

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

  760.             pixelsv2 = temp2;

  761.         } else {

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

  763.         }

  764. 

  765.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  766.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

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

  768.                              (vector unsigned short)pixelsv2);

  769.         temp3 = vec_add(pixelssum1, pixelssum2);

  770.         temp3 = vec_sra(temp3, vctwo);

  771.         pixelssum1 = vec_add(pixelssum2, vctwo);

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

  773. 

  774.         if (rightside) {

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

  776.         } else {

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

  778.         }

  779. 

  780.         vec_st(blockv, 0, block);

  781. 

  782.         block += line_size;

  783.         pixels += line_size;

  784.     }

  785. 

  786. POWERPC_PERF_STOP_COUNT(altivec_put_pixels8_xy2_num, 1);

  787. }

  788. 

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

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

  791. {

  792. POWERPC_PERF_DECLARE(altivec_put_no_rnd_pixels8_xy2_num, 1);

  793.     register int i;

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

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

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

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

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

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

  800. 

  801.     temp1 = vec_ld(0, pixels);

  802.     temp2 = vec_ld(16, pixels);

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

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

  805.         pixelsv2 = temp2;

  806.     } else {

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

  808.     }

  809.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  810.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

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

  812.                          (vector unsigned short)pixelsv2);

  813.     pixelssum1 = vec_add(pixelssum1, vcone);

  814. 

  815. POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);

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

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

  818.         blockv = vec_ld(0, block);

  819. 

  820.         temp1 = vec_ld(line_size, pixels);

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

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

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

  824.             pixelsv2 = temp2;

  825.         } else {

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

  827.         }

  828. 

  829.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  830.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

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

  832.                              (vector unsigned short)pixelsv2);

  833.         temp3 = vec_add(pixelssum1, pixelssum2);

  834.         temp3 = vec_sra(temp3, vctwo);

  835.         pixelssum1 = vec_add(pixelssum2, vcone);

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

  837. 

  838.         if (rightside) {

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

  840.         } else {

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

  842.         }

  843. 

  844.         vec_st(blockv, 0, block);

  845. 

  846.         block += line_size;

  847.         pixels += line_size;

  848.     }

  849. 

  850. POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);

  851. }

  852. 

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

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

  855. {

  856. POWERPC_PERF_DECLARE(altivec_put_pixels16_xy2_num, 1);

  857.     register int i;

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

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

  860.     register vector unsigned short temp3, temp4,

  861.         pixelssum1, pixelssum2, pixelssum3, pixelssum4;

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

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

  864. 

  865. POWERPC_PERF_START_COUNT(altivec_put_pixels16_xy2_num, 1);

  866. 

  867.     temp1 = vec_ld(0, pixels);

  868.     temp2 = vec_ld(16, pixels);

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

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

  871.         pixelsv2 = temp2;

  872.     } else {

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

  874.     }

  875.     pixelsv3 = vec_mergel(vczero, pixelsv1);

  876.     pixelsv4 = vec_mergel(vczero, pixelsv2);

  877.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  878.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

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

  880.                          (vector unsigned short)pixelsv4);

  881.     pixelssum3 = vec_add(pixelssum3, vctwo);

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

  883.                          (vector unsigned short)pixelsv2);

  884.     pixelssum1 = vec_add(pixelssum1, vctwo);

  885. 

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

  887.         blockv = vec_ld(0, block);

  888. 

  889.         temp1 = vec_ld(line_size, pixels);

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

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

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

  893.             pixelsv2 = temp2;

  894.         } else {

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

  896.         }

  897. 

  898.         pixelsv3 = vec_mergel(vczero, pixelsv1);

  899.         pixelsv4 = vec_mergel(vczero, pixelsv2);

  900.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  901.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

  902. 

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

  904.                              (vector unsigned short)pixelsv4);

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

  906.                              (vector unsigned short)pixelsv2);

  907.         temp4 = vec_add(pixelssum3, pixelssum4);

  908.         temp4 = vec_sra(temp4, vctwo);

  909.         temp3 = vec_add(pixelssum1, pixelssum2);

  910.         temp3 = vec_sra(temp3, vctwo);

  911. 

  912.         pixelssum3 = vec_add(pixelssum4, vctwo);

  913.         pixelssum1 = vec_add(pixelssum2, vctwo);

  914. 

  915.         blockv = vec_packsu(temp3, temp4);

  916. 

  917.         vec_st(blockv, 0, block);

  918. 

  919.         block += line_size;

  920.         pixels += line_size;

  921.     }

  922. 

  923. POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_xy2_num, 1);

  924. }

  925. 

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

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

  928. {

  929. POWERPC_PERF_DECLARE(altivec_put_no_rnd_pixels16_xy2_num, 1);

  930.     register int i;

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

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

  933.     register vector unsigned short temp3, temp4,

  934.         pixelssum1, pixelssum2, pixelssum3, pixelssum4;

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

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

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

  938. 

  939. POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);

  940. 

  941.     temp1 = vec_ld(0, pixels);

  942.     temp2 = vec_ld(16, pixels);

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

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

  945.         pixelsv2 = temp2;

  946.     } else {

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

  948.     }

  949.     pixelsv3 = vec_mergel(vczero, pixelsv1);

  950.     pixelsv4 = vec_mergel(vczero, pixelsv2);

  951.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  952.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

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

  954.                          (vector unsigned short)pixelsv4);

  955.     pixelssum3 = vec_add(pixelssum3, vcone);

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

  957.                          (vector unsigned short)pixelsv2);

  958.     pixelssum1 = vec_add(pixelssum1, vcone);

  959. 

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

  961.         blockv = vec_ld(0, block);

  962. 

  963.         temp1 = vec_ld(line_size, pixels);

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

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

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

  967.             pixelsv2 = temp2;

  968.         } else {

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

  970.         }

  971. 

  972.         pixelsv3 = vec_mergel(vczero, pixelsv1);

  973.         pixelsv4 = vec_mergel(vczero, pixelsv2);

  974.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  975.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

  976. 

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

  978.                              (vector unsigned short)pixelsv4);

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

  980.                              (vector unsigned short)pixelsv2);

  981.         temp4 = vec_add(pixelssum3, pixelssum4);

  982.         temp4 = vec_sra(temp4, vctwo);

  983.         temp3 = vec_add(pixelssum1, pixelssum2);

  984.         temp3 = vec_sra(temp3, vctwo);

  985. 

  986.         pixelssum3 = vec_add(pixelssum4, vcone);

  987.         pixelssum1 = vec_add(pixelssum2, vcone);

  988. 

  989.         blockv = vec_packsu(temp3, temp4);

  990. 

  991.         vec_st(blockv, 0, block);

  992. 

  993.         block += line_size;

  994.         pixels += line_size;

  995.     }

  996. 

  997. POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);

  998. }

  999. 

  1000. static int hadamard8_diff8x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){

  1001. POWERPC_PERF_DECLARE(altivec_hadamard8_diff8x8_num, 1);

  1002.     int sum;

  1003.     register const vector unsigned char vzero =

  1004.                             (const vector unsigned char)vec_splat_u8(0);

  1005.     register vector signed short temp0, temp1, temp2, temp3, temp4,

  1006.                                  temp5, temp6, temp7;

  1007. POWERPC_PERF_START_COUNT(altivec_hadamard8_diff8x8_num, 1);

  1008.     {

  1009.     register const vector signed short vprod1 =(const vector signed short)

  1010.                                                { 1,-1, 1,-1, 1,-1, 1,-1 };

  1011.     register const vector signed short vprod2 =(const vector signed short)

  1012.                                                { 1, 1,-1,-1, 1, 1,-1,-1 };

  1013.     register const vector signed short vprod3 =(const vector signed short)

  1014.                                                { 1, 1, 1, 1,-1,-1,-1,-1 };

  1015.     register const vector unsigned char perm1 = (const vector unsigned char)

  1016.         {0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,

  1017.          0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};

  1018.     register const vector unsigned char perm2 = (const vector unsigned char)

  1019.         {0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,

  1020.          0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};

  1021.     register const vector unsigned char perm3 = (const vector unsigned char)

  1022.         {0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,

  1023.          0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};

  1024. 

  1025. #define ONEITERBUTTERFLY(i, res)                                          \

  1026.     {                                                                     \

  1027.     register vector unsigned char src1, src2, srcO;                   \

  1028.     register vector unsigned char dst1, dst2, dstO;                   \

  1029.     register vector signed short srcV, dstV;                          \

  1030.     register vector signed short but0, but1, but2, op1, op2, op3;     \

  1031.     src1 = vec_ld(stride * i, src);                                   \

  1032.     src2 = vec_ld((stride * i) + 15, src);                            \

  1033.     srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src));           \

  1034.     dst1 = vec_ld(stride * i, dst);                                   \

  1035.     dst2 = vec_ld((stride * i) + 15, dst);                            \

  1036.     dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));           \

  1037.     /* promote the unsigned chars to signed shorts */                 \

  1038.     /* we're in the 8x8 function, we only care for the first 8 */     \

  1039.     srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \

  1040.            (vector signed char)srcO);                                 \

  1041.     dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \

  1042.            (vector signed char)dstO);                                 \

  1043.     /* subtractions inside the first butterfly */                     \

  1044.     but0 = vec_sub(srcV, dstV);                                       \

  1045.     op1  = vec_perm(but0, but0, perm1);                               \

  1046.     but1 = vec_mladd(but0, vprod1, op1);                              \

  1047.     op2  = vec_perm(but1, but1, perm2);                               \

  1048.     but2 = vec_mladd(but1, vprod2, op2);                              \

  1049.     op3  = vec_perm(but2, but2, perm3);                               \

  1050.     res  = vec_mladd(but2, vprod3, op3);                              \

  1051.     }

  1052.     ONEITERBUTTERFLY(0, temp0);

  1053.     ONEITERBUTTERFLY(1, temp1);

  1054.     ONEITERBUTTERFLY(2, temp2);

  1055.     ONEITERBUTTERFLY(3, temp3);

  1056.     ONEITERBUTTERFLY(4, temp4);

  1057.     ONEITERBUTTERFLY(5, temp5);

  1058.     ONEITERBUTTERFLY(6, temp6);

  1059.     ONEITERBUTTERFLY(7, temp7);

  1060.     }

  1061. #undef ONEITERBUTTERFLY

  1062.     {

  1063.     register vector signed int vsum;

  1064.     register vector signed short line0 = vec_add(temp0, temp1);

  1065.     register vector signed short line1 = vec_sub(temp0, temp1);

  1066.     register vector signed short line2 = vec_add(temp2, temp3);

  1067.     register vector signed short line3 = vec_sub(temp2, temp3);

  1068.     register vector signed short line4 = vec_add(temp4, temp5);

  1069.     register vector signed short line5 = vec_sub(temp4, temp5);

  1070.     register vector signed short line6 = vec_add(temp6, temp7);

  1071.     register vector signed short line7 = vec_sub(temp6, temp7);

  1072. 

  1073.     register vector signed short line0B = vec_add(line0, line2);

  1074.     register vector signed short line2B = vec_sub(line0, line2);

  1075.     register vector signed short line1B = vec_add(line1, line3);

  1076.     register vector signed short line3B = vec_sub(line1, line3);

  1077.     register vector signed short line4B = vec_add(line4, line6);

  1078.     register vector signed short line6B = vec_sub(line4, line6);

  1079.     register vector signed short line5B = vec_add(line5, line7);

  1080.     register vector signed short line7B = vec_sub(line5, line7);

  1081. 

  1082.     register vector signed short line0C = vec_add(line0B, line4B);

  1083.     register vector signed short line4C = vec_sub(line0B, line4B);

  1084.     register vector signed short line1C = vec_add(line1B, line5B);

  1085.     register vector signed short line5C = vec_sub(line1B, line5B);

  1086.     register vector signed short line2C = vec_add(line2B, line6B);

  1087.     register vector signed short line6C = vec_sub(line2B, line6B);

  1088.     register vector signed short line3C = vec_add(line3B, line7B);

  1089.     register vector signed short line7C = vec_sub(line3B, line7B);

  1090. 

  1091.     vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));

  1092.     vsum = vec_sum4s(vec_abs(line1C), vsum);

  1093.     vsum = vec_sum4s(vec_abs(line2C), vsum);

  1094.     vsum = vec_sum4s(vec_abs(line3C), vsum);

  1095.     vsum = vec_sum4s(vec_abs(line4C), vsum);

  1096.     vsum = vec_sum4s(vec_abs(line5C), vsum);

  1097.     vsum = vec_sum4s(vec_abs(line6C), vsum);

  1098.     vsum = vec_sum4s(vec_abs(line7C), vsum);

  1099.     vsum = vec_sums(vsum, (vector signed int)vzero);

  1100.     vsum = vec_splat(vsum, 3);

  1101.     vec_ste(vsum, 0, &sum);

  1102.     }

  1103. POWERPC_PERF_STOP_COUNT(altivec_hadamard8_diff8x8_num, 1);

  1104.     return sum;

  1105. }

  1106. 

  1107. /*

  1108. 16x8 works with 16 elements; it allows to avoid replicating loads, and

  1109. give the compiler more rooms for scheduling.  It's only used from

  1110. inside hadamard8_diff16_altivec.

  1111. 

  1112. Unfortunately, it seems gcc-3.3 is a bit dumb, and the compiled code has a LOT

  1113. of spill code, it seems gcc (unlike xlc) cannot keep everything in registers

  1114. by itself. The following code include hand-made registers allocation. It's not

  1115. clean, but on a 7450 the resulting code is much faster (best case fall from

  1116. 700+ cycles to 550).

  1117. 

  1118. xlc doesn't add spill code, but it doesn't know how to schedule for the 7450,

  1119. and its code isn't much faster than gcc-3.3 on the 7450 (but uses 25% less

  1120. instructions...)

  1121. 

  1122. On the 970, the hand-made RA is still a win (around 690 vs. around 780), but

  1123. xlc goes to around 660 on the regular C code...

  1124. */

  1125. 

  1126. static int hadamard8_diff16x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h) {

  1127.     int sum;

  1128.     register vector signed short

  1129.         temp0 __asm__ ("v0"),

  1130.         temp1 __asm__ ("v1"),

  1131.         temp2 __asm__ ("v2"),

  1132.         temp3 __asm__ ("v3"),

  1133.         temp4 __asm__ ("v4"),

  1134.         temp5 __asm__ ("v5"),

  1135.         temp6 __asm__ ("v6"),

  1136.         temp7 __asm__ ("v7");

  1137.     register vector signed short

  1138.         temp0S __asm__ ("v8"),

  1139.         temp1S __asm__ ("v9"),

  1140.         temp2S __asm__ ("v10"),

  1141.         temp3S __asm__ ("v11"),

  1142.         temp4S __asm__ ("v12"),

  1143.         temp5S __asm__ ("v13"),

  1144.         temp6S __asm__ ("v14"),

  1145.         temp7S __asm__ ("v15");

  1146.     register const vector unsigned char vzero __asm__ ("v31") =

  1147.         (const vector unsigned char)vec_splat_u8(0);

  1148.     {

  1149.     register const vector signed short vprod1 __asm__ ("v16") =

  1150.         (const vector signed short){ 1,-1, 1,-1, 1,-1, 1,-1 };

  1151.     register const vector signed short vprod2 __asm__ ("v17") =

  1152.         (const vector signed short){ 1, 1,-1,-1, 1, 1,-1,-1 };

  1153.     register const vector signed short vprod3 __asm__ ("v18") =

  1154.         (const vector signed short){ 1, 1, 1, 1,-1,-1,-1,-1 };

  1155.     register const vector unsigned char perm1 __asm__ ("v19") =

  1156.         (const vector unsigned char)

  1157.         {0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,

  1158.          0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};

  1159.     register const vector unsigned char perm2 __asm__ ("v20") =

  1160.         (const vector unsigned char)

  1161.         {0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,

  1162.          0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};

  1163.     register const vector unsigned char perm3 __asm__ ("v21") =

  1164.         (const vector unsigned char)

  1165.         {0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,

  1166.          0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};

  1167. 

  1168. #define ONEITERBUTTERFLY(i, res1, res2)                               \

  1169.     {                                                                 \

  1170.     register vector unsigned char src1 __asm__ ("v22"),               \

  1171.                                   src2 __asm__ ("v23"),               \

  1172.                                   dst1 __asm__ ("v24"),               \

  1173.                                   dst2 __asm__ ("v25"),               \

  1174.                                   srcO __asm__ ("v22"),               \

  1175.                                   dstO __asm__ ("v23");               \

  1176.                                                                       \

  1177.     register vector signed short  srcV  __asm__ ("v24"),              \

  1178.                                   dstV  __asm__ ("v25"),              \

  1179.                                   srcW  __asm__ ("v26"),              \

  1180.                                   dstW  __asm__ ("v27"),              \

  1181.                                   but0  __asm__ ("v28"),              \

  1182.                                   but0S __asm__ ("v29"),              \

  1183.                                   op1   __asm__ ("v30"),              \

  1184.                                   but1  __asm__ ("v22"),              \

  1185.                                   op1S  __asm__ ("v23"),              \

  1186.                                   but1S __asm__ ("v24"),              \

  1187.                                   op2   __asm__ ("v25"),              \

  1188.                                   but2  __asm__ ("v26"),              \

  1189.                                   op2S  __asm__ ("v27"),              \

  1190.                                   but2S __asm__ ("v28"),              \

  1191.                                   op3   __asm__ ("v29"),              \

  1192.                                   op3S  __asm__ ("v30");              \

  1193.                                                                       \

  1194.     src1 = vec_ld(stride * i, src);                                   \

  1195.     src2 = vec_ld((stride * i) + 16, src);                            \

  1196.     srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src));           \

  1197.     dst1 = vec_ld(stride * i, dst);                                   \

  1198.     dst2 = vec_ld((stride * i) + 16, dst);                            \

  1199.     dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));           \

  1200.     /* promote the unsigned chars to signed shorts */                 \

  1201.     srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \

  1202.            (vector signed char)srcO);                                 \

  1203.     dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \

  1204.            (vector signed char)dstO);                                 \

  1205.     srcW = (vector signed short)vec_mergel((vector signed char)vzero, \

  1206.            (vector signed char)srcO);                                 \

  1207.     dstW = (vector signed short)vec_mergel((vector signed char)vzero, \

  1208.            (vector signed char)dstO);                                 \

  1209.     /* subtractions inside the first butterfly */                     \

  1210.     but0 = vec_sub(srcV, dstV);                                       \

  1211.     but0S = vec_sub(srcW, dstW);                                      \

  1212.     op1 = vec_perm(but0, but0, perm1);                                \

  1213.     but1 = vec_mladd(but0, vprod1, op1);                              \

  1214.     op1S = vec_perm(but0S, but0S, perm1);                             \

  1215.     but1S = vec_mladd(but0S, vprod1, op1S);                           \

  1216.     op2 = vec_perm(but1, but1, perm2);                                \

  1217.     but2 = vec_mladd(but1, vprod2, op2);                              \

  1218.     op2S = vec_perm(but1S, but1S, perm2);                             \

  1219.     but2S = vec_mladd(but1S, vprod2, op2S);                           \

  1220.     op3 = vec_perm(but2, but2, perm3);                                \

  1221.     res1 = vec_mladd(but2, vprod3, op3);                              \

  1222.     op3S = vec_perm(but2S, but2S, perm3);                             \

  1223.     res2 = vec_mladd(but2S, vprod3, op3S);                            \

  1224.     }

  1225.     ONEITERBUTTERFLY(0, temp0, temp0S);

  1226.     ONEITERBUTTERFLY(1, temp1, temp1S);

  1227.     ONEITERBUTTERFLY(2, temp2, temp2S);

  1228.     ONEITERBUTTERFLY(3, temp3, temp3S);

  1229.     ONEITERBUTTERFLY(4, temp4, temp4S);

  1230.     ONEITERBUTTERFLY(5, temp5, temp5S);

  1231.     ONEITERBUTTERFLY(6, temp6, temp6S);

  1232.     ONEITERBUTTERFLY(7, temp7, temp7S);

  1233.     }

  1234. #undef ONEITERBUTTERFLY

  1235.     {

  1236.     register vector signed int vsum;

  1237.     register vector signed short line0S, line1S, line2S, line3S, line4S,

  1238.                                  line5S, line6S, line7S, line0BS,line2BS,

  1239.                                  line1BS,line3BS,line4BS,line6BS,line5BS,

  1240.                                  line7BS,line0CS,line4CS,line1CS,line5CS,

  1241.                                  line2CS,line6CS,line3CS,line7CS;

  1242. 

  1243.     register vector signed short line0 = vec_add(temp0, temp1);

  1244.     register vector signed short line1 = vec_sub(temp0, temp1);

  1245.     register vector signed short line2 = vec_add(temp2, temp3);

  1246.     register vector signed short line3 = vec_sub(temp2, temp3);

  1247.     register vector signed short line4 = vec_add(temp4, temp5);

  1248.     register vector signed short line5 = vec_sub(temp4, temp5);

  1249.     register vector signed short line6 = vec_add(temp6, temp7);

  1250.     register vector signed short line7 = vec_sub(temp6, temp7);

  1251. 

  1252.     register vector signed short line0B = vec_add(line0, line2);

  1253.     register vector signed short line2B = vec_sub(line0, line2);

  1254.     register vector signed short line1B = vec_add(line1, line3);

  1255.     register vector signed short line3B = vec_sub(line1, line3);

  1256.     register vector signed short line4B = vec_add(line4, line6);

  1257.     register vector signed short line6B = vec_sub(line4, line6);

  1258.     register vector signed short line5B = vec_add(line5, line7);

  1259.     register vector signed short line7B = vec_sub(line5, line7);

  1260. 

  1261.     register vector signed short line0C = vec_add(line0B, line4B);

  1262.     register vector signed short line4C = vec_sub(line0B, line4B);

  1263.     register vector signed short line1C = vec_add(line1B, line5B);

  1264.     register vector signed short line5C = vec_sub(line1B, line5B);

  1265.     register vector signed short line2C = vec_add(line2B, line6B);

  1266.     register vector signed short line6C = vec_sub(line2B, line6B);

  1267.     register vector signed short line3C = vec_add(line3B, line7B);

  1268.     register vector signed short line7C = vec_sub(line3B, line7B);

  1269. 

  1270.     vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));

  1271.     vsum = vec_sum4s(vec_abs(line1C), vsum);

  1272.     vsum = vec_sum4s(vec_abs(line2C), vsum);

  1273.     vsum = vec_sum4s(vec_abs(line3C), vsum);

  1274.     vsum = vec_sum4s(vec_abs(line4C), vsum);

  1275.     vsum = vec_sum4s(vec_abs(line5C), vsum);

  1276.     vsum = vec_sum4s(vec_abs(line6C), vsum);

  1277.     vsum = vec_sum4s(vec_abs(line7C), vsum);

  1278. 

  1279.     line0S = vec_add(temp0S, temp1S);

  1280.     line1S = vec_sub(temp0S, temp1S);

  1281.     line2S = vec_add(temp2S, temp3S);

  1282.     line3S = vec_sub(temp2S, temp3S);

  1283.     line4S = vec_add(temp4S, temp5S);

  1284.     line5S = vec_sub(temp4S, temp5S);

  1285.     line6S = vec_add(temp6S, temp7S);

  1286.     line7S = vec_sub(temp6S, temp7S);

  1287. 

  1288.     line0BS = vec_add(line0S, line2S);

  1289.     line2BS = vec_sub(line0S, line2S);

  1290.     line1BS = vec_add(line1S, line3S);

  1291.     line3BS = vec_sub(line1S, line3S);

  1292.     line4BS = vec_add(line4S, line6S);

  1293.     line6BS = vec_sub(line4S, line6S);

  1294.     line5BS = vec_add(line5S, line7S);

  1295.     line7BS = vec_sub(line5S, line7S);

  1296. 

  1297.     line0CS = vec_add(line0BS, line4BS);

  1298.     line4CS = vec_sub(line0BS, line4BS);

  1299.     line1CS = vec_add(line1BS, line5BS);

  1300.     line5CS = vec_sub(line1BS, line5BS);

  1301.     line2CS = vec_add(line2BS, line6BS);

  1302.     line6CS = vec_sub(line2BS, line6BS);

  1303.     line3CS = vec_add(line3BS, line7BS);

  1304.     line7CS = vec_sub(line3BS, line7BS);

  1305. 

  1306.     vsum = vec_sum4s(vec_abs(line0CS), vsum);

  1307.     vsum = vec_sum4s(vec_abs(line1CS), vsum);

  1308.     vsum = vec_sum4s(vec_abs(line2CS), vsum);

  1309.     vsum = vec_sum4s(vec_abs(line3CS), vsum);

  1310.     vsum = vec_sum4s(vec_abs(line4CS), vsum);

  1311.     vsum = vec_sum4s(vec_abs(line5CS), vsum);

  1312.     vsum = vec_sum4s(vec_abs(line6CS), vsum);

  1313.     vsum = vec_sum4s(vec_abs(line7CS), vsum);

  1314.     vsum = vec_sums(vsum, (vector signed int)vzero);

  1315.     vsum = vec_splat(vsum, 3);

  1316.     vec_ste(vsum, 0, &sum);

  1317.     }

  1318.     return sum;

  1319. }

  1320. 

  1321. static int hadamard8_diff16_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){

  1322. POWERPC_PERF_DECLARE(altivec_hadamard8_diff16_num, 1);

  1323.     int score;

  1324. POWERPC_PERF_START_COUNT(altivec_hadamard8_diff16_num, 1);

  1325.     score = hadamard8_diff16x8_altivec(s, dst, src, stride, 8);

  1326.     if (h==16) {

  1327.         dst += 8*stride;

  1328.         src += 8*stride;

  1329.         score += hadamard8_diff16x8_altivec(s, dst, src, stride, 8);

  1330.     }

  1331. POWERPC_PERF_STOP_COUNT(altivec_hadamard8_diff16_num, 1);

  1332.     return score;

  1333. }

  1334. 

  1335. static void vorbis_inverse_coupling_altivec(float *mag, float *ang,

  1336.                                             int blocksize)

  1337. {

  1338.     int i;

  1339.     vector float m, a;

  1340.     vector bool int t0, t1;

  1341.     const vector unsigned int v_31 = //XXX

  1342.         vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));

  1343.     for (i = 0; i < blocksize; i += 4) {

  1344.         m = vec_ld(0, mag+i);

  1345.         a = vec_ld(0, ang+i);

  1346.         t0 = vec_cmple(m, (vector float)vec_splat_u32(0));

  1347.         t1 = vec_cmple(a, (vector float)vec_splat_u32(0));

  1348.         a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));

  1349.         t0 = (vector bool int)vec_and(a, t1);

  1350.         t1 = (vector bool int)vec_andc(a, t1);

  1351.         a = vec_sub(m, (vector float)t1);

  1352.         m = vec_add(m, (vector float)t0);

  1353.         vec_stl(a, 0, ang+i);

  1354.         vec_stl(m, 0, mag+i);

  1355.     }

  1356. }

  1357. 

  1358. /* next one assumes that ((line_size % 8) == 0) */

  1359. static void avg_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)

  1360. {

  1361. POWERPC_PERF_DECLARE(altivec_avg_pixels8_xy2_num, 1);

  1362.     register int i;

  1363.     register vector unsigned char pixelsv1, pixelsv2, pixelsavg;

  1364.     register vector unsigned char blockv, temp1, temp2, blocktemp;

  1365.     register vector unsigned short pixelssum1, pixelssum2, temp3;

  1366. 

  1367.     register const vector unsigned char vczero = (const vector unsigned char)

  1368.                                         vec_splat_u8(0);

  1369.     register const vector unsigned short vctwo = (const vector unsigned short)

  1370.                                         vec_splat_u16(2);

  1371. 

  1372.     temp1 = vec_ld(0, pixels);

  1373.     temp2 = vec_ld(16, pixels);

  1374.     pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));

  1375.     if ((((unsigned long)pixels) & 0x0000000F) ==  0x0000000F) {

  1376.         pixelsv2 = temp2;

  1377.     } else {

  1378.         pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));

  1379.     }

  1380.     pixelsv1 = vec_mergeh(vczero, pixelsv1);

  1381.     pixelsv2 = vec_mergeh(vczero, pixelsv2);

  1382.     pixelssum1 = vec_add((vector unsigned short)pixelsv1,

  1383.                          (vector unsigned short)pixelsv2);

  1384.     pixelssum1 = vec_add(pixelssum1, vctwo);

  1385. 

  1386. POWERPC_PERF_START_COUNT(altivec_avg_pixels8_xy2_num, 1);

  1387.     for (i = 0; i < h ; i++) {

  1388.         int rightside = ((unsigned long)block & 0x0000000F);

  1389.         blockv = vec_ld(0, block);

  1390. 

  1391.         temp1 = vec_ld(line_size, pixels);

  1392.         temp2 = vec_ld(line_size + 16, pixels);

  1393.         pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));

  1394.         if (((((unsigned long)pixels) + line_size) & 0x0000000F) ==  0x0000000F) {

  1395.             pixelsv2 = temp2;

  1396.         } else {

  1397.             pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));

  1398.         }

  1399. 

  1400.         pixelsv1 = vec_mergeh(vczero, pixelsv1);

  1401.         pixelsv2 = vec_mergeh(vczero, pixelsv2);

  1402.         pixelssum2 = vec_add((vector unsigned short)pixelsv1,

  1403.                              (vector unsigned short)pixelsv2);

  1404.         temp3 = vec_add(pixelssum1, pixelssum2);

  1405.         temp3 = vec_sra(temp3, vctwo);

  1406.         pixelssum1 = vec_add(pixelssum2, vctwo);

  1407.         pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);

  1408. 

  1409.         if (rightside) {

  1410.             blocktemp = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));

  1411.         } else {

  1412.             blocktemp = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));

  1413.         }

  1414. 

  1415.         blockv = vec_avg(blocktemp, blockv);

  1416.         vec_st(blockv, 0, block);

  1417. 

  1418.         block += line_size;

  1419.         pixels += line_size;

  1420.     }

  1421. 

  1422. POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_xy2_num, 1);

  1423. }

  1424. 

  1425. void dsputil_init_altivec(DSPContext* c, AVCodecContext *avctx)

  1426. {

  1427.     c->pix_abs[0][1] = sad16_x2_altivec;

  1428.     c->pix_abs[0][2] = sad16_y2_altivec;

  1429.     c->pix_abs[0][3] = sad16_xy2_altivec;

  1430.     c->pix_abs[0][0] = sad16_altivec;

  1431.     c->pix_abs[1][0] = sad8_altivec;

  1432.     c->sad[0]= sad16_altivec;

  1433.     c->sad[1]= sad8_altivec;

  1434.     c->pix_norm1 = pix_norm1_altivec;

  1435.     c->sse[1]= sse8_altivec;

  1436.     c->sse[0]= sse16_altivec;

  1437.     c->pix_sum = pix_sum_altivec;

  1438.     c->diff_pixels = diff_pixels_altivec;

  1439.     c->get_pixels = get_pixels_altivec;

  1440.     c->clear_block = clear_block_altivec;

  1441.     c->add_bytes= add_bytes_altivec;

  1442.     c->put_pixels_tab[0][0] = put_pixels16_altivec;

  1443.     /* the two functions do the same thing, so use the same code */

  1444.     c->put_no_rnd_pixels_tab[0][0] = put_pixels16_altivec;

  1445.     c->avg_pixels_tab[0][0] = avg_pixels16_altivec;

  1446.     c->avg_pixels_tab[1][0] = avg_pixels8_altivec;

  1447.     c->avg_pixels_tab[1][3] = avg_pixels8_xy2_altivec;

  1448.     c->put_pixels_tab[1][3] = put_pixels8_xy2_altivec;

  1449.     c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_altivec;

  1450.     c->put_pixels_tab[0][3] = put_pixels16_xy2_altivec;

  1451.     c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_altivec;

  1452. 

  1453.     c->hadamard8_diff[0] = hadamard8_diff16_altivec;

  1454.     c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;

  1455.     if (CONFIG_VORBIS_DECODER)

  1456.         c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;

  1457. }