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FFmpeg/libavcodec/ppc/me_cmp.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 Libav.

  7.  *

  8.  * Libav 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.  * Libav 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 Libav; 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. 

  28. #include "libavutil/attributes.h"

  29. #include "libavutil/cpu.h"

  30. #include "libavutil/ppc/cpu.h"

  31. #include "libavutil/ppc/types_altivec.h"

  32. #include "libavutil/ppc/util_altivec.h"

  33. #include "libavcodec/avcodec.h"

  34. #include "libavcodec/mpegvideo.h"

  35. #include "libavcodec/me_cmp.h"

  36. 

  37. #if HAVE_ALTIVEC

  38. static int sad16_x2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  39.                             ptrdiff_t stride, int h)

  40. {

  41.     int i, s = 0;

  42.     const vector unsigned char zero =

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

  44.     vector unsigned char perm1 = vec_lvsl(0, pix2);

  45.     vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));

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

  47.     vector signed int sumdiffs;

  48. 

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

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

  51.          * pix1v: pix1[0] - pix1[15]

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

  53.         vector unsigned char pix1v  = vec_ld(0,  pix1);

  54.         vector unsigned char pix2l  = vec_ld(0,  pix2);

  55.         vector unsigned char pix2r  = vec_ld(16, pix2);

  56.         vector unsigned char pix2v  = vec_perm(pix2l, pix2r, perm1);

  57.         vector unsigned char pix2iv = vec_perm(pix2l, pix2r, perm2);

  58. 

  59.         /* Calculate the average vector. */

  60.         vector unsigned char avgv = vec_avg(pix2v, pix2iv);

  61. 

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

  63.         vector unsigned char t5 = vec_sub(vec_max(pix1v, avgv),

  64.                                           vec_min(pix1v, avgv));

  65. 

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

  67.         sad = vec_sum4s(t5, sad);

  68. 

  69.         pix1 += stride;

  70.         pix2 += stride;

  71.     }

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

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

  74.     sumdiffs = vec_splat(sumdiffs, 3);

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

  76. 

  77.     return s;

  78. }

  79. 

  80. static int sad16_y2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  81.                             ptrdiff_t stride, int h)

  82. {

  83.     int i, s = 0;

  84.     const vector unsigned char zero =

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

  86.     vector unsigned char perm = vec_lvsl(0, pix2);

  87.     vector unsigned char pix1v, pix3v, avgv, t5;

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

  89.     vector signed int sumdiffs;

  90.     uint8_t *pix3 = pix2 + stride;

  91. 

  92.     /* Due to the fact that pix3 = pix2 + stride, 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.     vector unsigned char pix2l = vec_ld(0,  pix2);

  100.     vector unsigned char pix2r = vec_ld(15, pix2);

  101.     vector unsigned char pix2v = vec_perm(pix2l, pix2r, perm);

  102. 

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

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

  105.          * pix1v: pix1[0] - pix1[15]

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

  107.         pix1v = vec_ld(0,  pix1);

  108. 

  109.         pix2l = vec_ld(0,  pix3);

  110.         pix2r = vec_ld(15, pix3);

  111.         pix3v = vec_perm(pix2l, pix2r, perm);

  112. 

  113.         /* Calculate the average vector. */

  114.         avgv = vec_avg(pix2v, pix3v);

  115. 

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

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

  118. 

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

  120.         sad = vec_sum4s(t5, sad);

  121. 

  122.         pix1 += stride;

  123.         pix2v = pix3v;

  124.         pix3 += stride;

  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(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  135.                              ptrdiff_t stride, int h)

  136. {

  137.     int i, s = 0;

  138.     uint8_t *pix3 = pix2 + stride;

  139.     const vector unsigned char zero =

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

  141.     const vector unsigned short two =

  142.         (const vector unsigned short) vec_splat_u16(2);

  143.     vector unsigned char avgv, t5;

  144.     vector unsigned char perm1 = vec_lvsl(0, pix2);

  145.     vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));

  146.     vector unsigned char pix1v, pix3v, pix3iv;

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

  148.     vector unsigned short avghv, avglv;

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

  150.     vector signed int sumdiffs;

  151. 

  152.     /* Due to the fact that pix3 = pix2 + stride, the pix3 of one

  153.      * iteration becomes pix2 in the next iteration. We can use this

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

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

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

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

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

  159.     vector unsigned char pix2l  = vec_ld(0,  pix2);

  160.     vector unsigned char pix2r  = vec_ld(16, pix2);

  161.     vector unsigned char pix2v  = vec_perm(pix2l, pix2r, perm1);

  162.     vector unsigned char pix2iv = vec_perm(pix2l, pix2r, perm2);

  163. 

  164.     vector unsigned short pix2hv  =

  165.         (vector unsigned short) vec_mergeh(zero, pix2v);

  166.     vector unsigned short pix2lv  =

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

  168.     vector unsigned short pix2ihv =

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

  170.     vector unsigned short pix2ilv =

  171.         (vector unsigned short) vec_mergel(zero, pix2iv);

  172.     vector unsigned short t1 = vec_add(pix2hv, pix2ihv);

  173.     vector unsigned short t2 = vec_add(pix2lv, pix2ilv);

  174.     vector unsigned short t3, t4;

  175. 

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

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

  178.          * pix1v: pix1[0] - pix1[15]

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

  180.         pix1v  = vec_ld(0, pix1);

  181. 

  182.         pix2l  = vec_ld(0, pix3);

  183.         pix2r  = vec_ld(16, pix3);

  184.         pix3v  = vec_perm(pix2l, pix2r, perm1);

  185.         pix3iv = vec_perm(pix2l, pix2r, perm2);

  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

  189.          * rounding would mean that, for example, avg(3, 0, 0, 1) = 2, when

  190.          * it should be 1. Instead, we have to split the pixel vectors into

  191.          * vectors of shorts 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 += stride;

  216.         pix3 += stride;

  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(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  230.                          ptrdiff_t stride, int h)

  231. {

  232.     int i, s;

  233.     const vector unsigned int zero =

  234.         (const vector unsigned int) vec_splat_u32(0);

  235.     vector unsigned char perm = vec_lvsl(0, pix2);

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

  237.     vector signed int sumdiffs;

  238. 

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

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

  241.         vector unsigned char pix2l = vec_ld(0,  pix2);

  242.         vector unsigned char pix2r = vec_ld(15, pix2);

  243.         vector unsigned char t1 = vec_ld(0, pix1);

  244.         vector unsigned char t2 = vec_perm(pix2l, pix2r, perm);

  245. 

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

  247.         vector unsigned char t3 = vec_max(t1, t2);

  248.         vector unsigned char t4 = vec_min(t1, t2);

  249.         vector unsigned char t5 = vec_sub(t3, t4);

  250. 

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

  252.         sad = vec_sum4s(t5, sad);

  253. 

  254.         pix1 += stride;

  255.         pix2 += stride;

  256.     }

  257. 

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

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

  260.     sumdiffs = vec_splat(sumdiffs, 3);

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

  262. 

  263.     return s;

  264. }

  265. 

  266. static int sad8_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  267.                         ptrdiff_t stride, int h)

  268. {

  269.     int i, s;

  270.     const vector unsigned int zero =

  271.         (const vector unsigned int) vec_splat_u32(0);

  272.     const vector unsigned char permclear =

  273.         (vector unsigned char)

  274.         { 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0 };

  275.     vector unsigned char perm1 = vec_lvsl(0, pix1);

  276.     vector unsigned char perm2 = vec_lvsl(0, pix2);

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

  278.     vector signed int sumdiffs;

  279. 

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

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

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

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

  284.         vector unsigned char pix1l = vec_ld(0, pix1);

  285.         vector unsigned char pix1r = vec_ld(7, pix1);

  286.         vector unsigned char pix2l = vec_ld(0, pix2);

  287.         vector unsigned char pix2r = vec_ld(7, pix2);

  288.         vector unsigned char t1 = vec_and(vec_perm(pix1l, pix1r, perm1),

  289.                                           permclear);

  290.         vector unsigned char t2 = vec_and(vec_perm(pix2l, pix2r, perm2),

  291.                                           permclear);

  292. 

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

  294.         vector unsigned char t3 = vec_max(t1, t2);

  295.         vector unsigned char t4 = vec_min(t1, t2);

  296.         vector unsigned char t5 = vec_sub(t3, t4);

  297. 

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

  299.         sad = vec_sum4s(t5, sad);

  300. 

  301.         pix1 += stride;

  302.         pix2 += stride;

  303.     }

  304. 

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

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

  307.     sumdiffs = vec_splat(sumdiffs, 3);

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

  309. 

  310.     return s;

  311. }

  312. 

  313. /* Sum of Squared Errors for an 8x8 block, AltiVec-enhanced.

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

  315. static int sse8_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  316.                         ptrdiff_t stride, int h)

  317. {

  318.     int i, s;

  319.     const vector unsigned int zero =

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

  321.     const vector unsigned char permclear =

  322.         (vector unsigned char)

  323.         { 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0 };

  324.     vector unsigned char perm1 = vec_lvsl(0, pix1);

  325.     vector unsigned char perm2 = vec_lvsl(0, pix2);

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

  327.     vector signed int sumsqr;

  328. 

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

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

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

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

  333.         vector unsigned char pix1l = vec_ld(0, pix1);

  334.         vector unsigned char pix1r = vec_ld(7, pix1);

  335.         vector unsigned char pix2l = vec_ld(0, pix2);

  336.         vector unsigned char pix2r = vec_ld(7, pix2);

  337.         vector unsigned char t1 = vec_and(vec_perm(pix1l, pix1r, perm1),

  338.                                           permclear);

  339.         vector unsigned char t2 = vec_and(vec_perm(pix2l, pix2r, perm2),

  340.                                           permclear);

  341. 

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

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

  344. 

  345.         /* Calculate abs differences vector. */

  346.         vector unsigned char t3 = vec_max(t1, t2);

  347.         vector unsigned char t4 = vec_min(t1, t2);

  348.         vector unsigned char t5 = vec_sub(t3, t4);

  349. 

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

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

  352. 

  353.         pix1 += stride;

  354.         pix2 += stride;

  355.     }

  356. 

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

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

  359.     sumsqr = vec_splat(sumsqr, 3);

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

  361. 

  362.     return s;

  363. }

  364. 

  365. /* Sum of Squared Errors for a 16x16 block, AltiVec-enhanced.

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

  367. static int sse16_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  368.                          ptrdiff_t stride, int h)

  369. {

  370.     int i, s;

  371.     const vector unsigned int zero =

  372.         (const vector unsigned int) vec_splat_u32(0);

  373.     vector unsigned char perm = vec_lvsl(0, pix2);

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

  375.     vector signed int sumsqr;

  376. 

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

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

  379.         vector unsigned char pix2l = vec_ld(0,  pix2);

  380.         vector unsigned char pix2r = vec_ld(15, pix2);

  381.         vector unsigned char t1 = vec_ld(0, pix1);

  382.         vector unsigned char t2 = vec_perm(pix2l, pix2r, perm);

  383. 

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

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

  386. 

  387.         /* Calculate abs differences vector. */

  388.         vector unsigned char t3 = vec_max(t1, t2);

  389.         vector unsigned char t4 = vec_min(t1, t2);

  390.         vector unsigned char t5 = vec_sub(t3, t4);

  391. 

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

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

  394. 

  395.         pix1 += stride;

  396.         pix2 += stride;

  397.     }

  398. 

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

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

  401.     sumsqr = vec_splat(sumsqr, 3);

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

  403. 

  404.     return s;

  405. }

  406. 

  407. static int hadamard8_diff8x8_altivec(MpegEncContext *s, uint8_t *dst,

  408.                                      uint8_t *src, ptrdiff_t stride, int h)

  409. {

  410.     int sum;

  411.     register const vector unsigned char vzero =

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

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

  414.                                  temp5, temp6, temp7;

  415.     {

  416.         register const vector signed short vprod1 =

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

  418.         register const vector signed short vprod2 =

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

  420.         register const vector signed short vprod3 =

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

  422.         register const vector unsigned char perm1 =

  423.             (const vector unsigned char)

  424.             { 0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,

  425.               0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D };

  426.         register const vector unsigned char perm2 =

  427.             (const vector unsigned char)

  428.             { 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,

  429.               0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B };

  430.         register const vector unsigned char perm3 =

  431.             (const vector unsigned char)

  432.             { 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,

  433.               0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };

  434. 

  435. #define ONEITERBUTTERFLY(i, res)                                            \

  436.     {                                                                       \

  437.         register vector unsigned char src1 = vec_ld(stride * i, src);       \

  438.         register vector unsigned char src2 = vec_ld(stride * i + 15, src);  \

  439.         register vector unsigned char srcO =                                \

  440.             vec_perm(src1, src2, vec_lvsl(stride * i, src));                \

  441.         register vector unsigned char dst1 = vec_ld(stride * i, dst);       \

  442.         register vector unsigned char dst2 = vec_ld(stride * i + 15, dst);  \

  443.         register vector unsigned char dstO =                                \

  444.             vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));                \

  445.                                                                             \

  446.         /* Promote the unsigned chars to signed shorts. */                  \

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

  448.         register vector signed short srcV =                                 \

  449.             (vector signed short) vec_mergeh((vector signed char) vzero,    \

  450.                                              (vector signed char) srcO);    \

  451.         register vector signed short dstV =                                 \

  452.             (vector signed short) vec_mergeh((vector signed char) vzero,    \

  453.                                              (vector signed char) dstO);    \

  454.                                                                             \

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

  456.         register vector signed short but0 = vec_sub(srcV, dstV);            \

  457.         register vector signed short op1  = vec_perm(but0, but0, perm1);    \

  458.         register vector signed short but1 = vec_mladd(but0, vprod1, op1);   \

  459.         register vector signed short op2  = vec_perm(but1, but1, perm2);    \

  460.         register vector signed short but2 = vec_mladd(but1, vprod2, op2);   \

  461.         register vector signed short op3  = vec_perm(but2, but2, perm3);    \

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

  463.     }

  464.         ONEITERBUTTERFLY(0, temp0);

  465.         ONEITERBUTTERFLY(1, temp1);

  466.         ONEITERBUTTERFLY(2, temp2);

  467.         ONEITERBUTTERFLY(3, temp3);

  468.         ONEITERBUTTERFLY(4, temp4);

  469.         ONEITERBUTTERFLY(5, temp5);

  470.         ONEITERBUTTERFLY(6, temp6);

  471.         ONEITERBUTTERFLY(7, temp7);

  472.     }

  473. #undef ONEITERBUTTERFLY

  474.     {

  475.         register vector signed int vsum;

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

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

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

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

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

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

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

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

  484. 

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

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

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

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

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

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

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

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

  493. 

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

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

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

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

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

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

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

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

  502. 

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

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

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

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

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

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

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

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

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

  512.         vsum = vec_splat(vsum, 3);

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

  514.     }

  515.     return sum;

  516. }

  517. 

  518. /*

  519.  * 16x8 works with 16 elements; it allows to avoid replicating loads, and

  520.  * gives the compiler more room for scheduling. It's only used from

  521.  * inside hadamard8_diff16_altivec.

  522.  *

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

  524.  * a LOT of spill code, it seems gcc (unlike xlc) cannot keep everything in

  525.  * registers by itself. The following code includes hand-made register

  526.  * allocation. It's not clean, but on a 7450 the resulting code is much faster

  527.  * (best case falls from 700+ cycles to 550).

  528.  *

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

  530.  * 7450, and its code isn't much faster than gcc-3.3 on the 7450 (but uses

  531.  * 25% fewer instructions...)

  532.  *

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

  534.  * but xlc goes to around 660 on the regular C code...

  535.  */

  536. static int hadamard8_diff16x8_altivec(MpegEncContext *s, uint8_t *dst,

  537.                                       uint8_t *src, ptrdiff_t stride, int h)

  538. {

  539.     int sum;

  540.     register vector signed short

  541.         temp0 __asm__ ("v0"),

  542.         temp1 __asm__ ("v1"),

  543.         temp2 __asm__ ("v2"),

  544.         temp3 __asm__ ("v3"),

  545.         temp4 __asm__ ("v4"),

  546.         temp5 __asm__ ("v5"),

  547.         temp6 __asm__ ("v6"),

  548.         temp7 __asm__ ("v7");

  549.     register vector signed short

  550.         temp0S __asm__ ("v8"),

  551.         temp1S __asm__ ("v9"),

  552.         temp2S __asm__ ("v10"),

  553.         temp3S __asm__ ("v11"),

  554.         temp4S __asm__ ("v12"),

  555.         temp5S __asm__ ("v13"),

  556.         temp6S __asm__ ("v14"),

  557.         temp7S __asm__ ("v15");

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

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

  560.     {

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

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

  563. 

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

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

  566. 

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

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

  569. 

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

  571.             (const vector unsigned char)

  572.             { 0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,

  573.               0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D };

  574. 

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

  576.             (const vector unsigned char)

  577.             { 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,

  578.               0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B };

  579. 

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

  581.             (const vector unsigned char)

  582.             { 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,

  583.               0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };

  584. 

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

  586.     {                                                                       \

  587.         register vector unsigned char src1 __asm__ ("v22") =                \

  588.             vec_ld(stride * i, src);                                        \

  589.         register vector unsigned char src2 __asm__ ("v23") =                \

  590.             vec_ld(stride * i + 16, src);                                   \

  591.         register vector unsigned char srcO __asm__ ("v22") =                \

  592.             vec_perm(src1, src2, vec_lvsl(stride * i, src));                \

  593.         register vector unsigned char dst1 __asm__ ("v24") =                \

  594.             vec_ld(stride * i, dst);                                        \

  595.         register vector unsigned char dst2 __asm__ ("v25") =                \

  596.             vec_ld(stride * i + 16, dst);                                   \

  597.         register vector unsigned char dstO __asm__ ("v23") =                \

  598.             vec_perm(dst1, dst2, vec_lvsl(stride * i, dst));                \

  599.                                                                             \

  600.         /* Promote the unsigned chars to signed shorts. */                  \

  601.         register vector signed short srcV __asm__ ("v24") =                 \

  602.             (vector signed short) vec_mergeh((vector signed char) vzero,    \

  603.                                              (vector signed char) srcO);    \

  604.         register vector signed short dstV __asm__ ("v25") =                 \

  605.             (vector signed short) vec_mergeh((vector signed char) vzero,    \

  606.                                              (vector signed char) dstO);    \

  607.         register vector signed short srcW __asm__ ("v26") =                 \

  608.             (vector signed short) vec_mergel((vector signed char) vzero,    \

  609.                                              (vector signed char) srcO);    \

  610.         register vector signed short dstW __asm__ ("v27") =                 \

  611.             (vector signed short) vec_mergel((vector signed char) vzero,    \

  612.                                              (vector signed char) dstO);    \

  613.                                                                             \

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

  615.         register vector signed short but0  __asm__ ("v28") =                \

  616.             vec_sub(srcV, dstV);                                            \

  617.         register vector signed short but0S __asm__ ("v29") =                \

  618.             vec_sub(srcW, dstW);                                            \

  619.         register vector signed short op1   __asm__ ("v30") =                \

  620.             vec_perm(but0, but0, perm1);                                    \

  621.         register vector signed short but1  __asm__ ("v22") =                \

  622.             vec_mladd(but0, vprod1, op1);                                   \

  623.         register vector signed short op1S  __asm__ ("v23") =                \

  624.             vec_perm(but0S, but0S, perm1);                                  \

  625.         register vector signed short but1S __asm__ ("v24") =                \

  626.             vec_mladd(but0S, vprod1, op1S);                                 \

  627.         register vector signed short op2   __asm__ ("v25") =                \

  628.             vec_perm(but1, but1, perm2);                                    \

  629.         register vector signed short but2  __asm__ ("v26") =                \

  630.             vec_mladd(but1, vprod2, op2);                                   \

  631.         register vector signed short op2S  __asm__ ("v27") =                \

  632.             vec_perm(but1S, but1S, perm2);                                  \

  633.         register vector signed short but2S __asm__ ("v28") =                \

  634.             vec_mladd(but1S, vprod2, op2S);                                 \

  635.         register vector signed short op3   __asm__ ("v29") =                \

  636.             vec_perm(but2, but2, perm3);                                    \

  637.         register vector signed short op3S  __asm__ ("v30") =                \

  638.             vec_perm(but2S, but2S, perm3);                                  \

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

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

  641.     }

  642.         ONEITERBUTTERFLY(0, temp0, temp0S);

  643.         ONEITERBUTTERFLY(1, temp1, temp1S);

  644.         ONEITERBUTTERFLY(2, temp2, temp2S);

  645.         ONEITERBUTTERFLY(3, temp3, temp3S);

  646.         ONEITERBUTTERFLY(4, temp4, temp4S);

  647.         ONEITERBUTTERFLY(5, temp5, temp5S);

  648.         ONEITERBUTTERFLY(6, temp6, temp6S);

  649.         ONEITERBUTTERFLY(7, temp7, temp7S);

  650.     }

  651. #undef ONEITERBUTTERFLY

  652.     {

  653.         register vector signed int vsum;

  654. 

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

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

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

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

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

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

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

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

  663. 

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

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

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

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

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

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

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

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

  672. 

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

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

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

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

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

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

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

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

  681. 

  682.         register vector signed short line0S = vec_add(temp0S, temp1S);

  683.         register vector signed short line1S = vec_sub(temp0S, temp1S);

  684.         register vector signed short line2S = vec_add(temp2S, temp3S);

  685.         register vector signed short line3S = vec_sub(temp2S, temp3S);

  686.         register vector signed short line4S = vec_add(temp4S, temp5S);

  687.         register vector signed short line5S = vec_sub(temp4S, temp5S);

  688.         register vector signed short line6S = vec_add(temp6S, temp7S);

  689.         register vector signed short line7S = vec_sub(temp6S, temp7S);

  690. 

  691.         register vector signed short line0BS = vec_add(line0S, line2S);

  692.         register vector signed short line2BS = vec_sub(line0S, line2S);

  693.         register vector signed short line1BS = vec_add(line1S, line3S);

  694.         register vector signed short line3BS = vec_sub(line1S, line3S);

  695.         register vector signed short line4BS = vec_add(line4S, line6S);

  696.         register vector signed short line6BS = vec_sub(line4S, line6S);

  697.         register vector signed short line5BS = vec_add(line5S, line7S);

  698.         register vector signed short line7BS = vec_sub(line5S, line7S);

  699. 

  700.         register vector signed short line0CS = vec_add(line0BS, line4BS);

  701.         register vector signed short line4CS = vec_sub(line0BS, line4BS);

  702.         register vector signed short line1CS = vec_add(line1BS, line5BS);

  703.         register vector signed short line5CS = vec_sub(line1BS, line5BS);

  704.         register vector signed short line2CS = vec_add(line2BS, line6BS);

  705.         register vector signed short line6CS = vec_sub(line2BS, line6BS);

  706.         register vector signed short line3CS = vec_add(line3BS, line7BS);

  707.         register vector signed short line7CS = vec_sub(line3BS, line7BS);

  708. 

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

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

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

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

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

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

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

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

  717. 

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

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

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

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

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

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

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

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

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

  727.         vsum = vec_splat(vsum, 3);

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

  729.     }

  730.     return sum;

  731. }

  732. 

  733. static int hadamard8_diff16_altivec(MpegEncContext *s, uint8_t *dst,

  734.                                     uint8_t *src, ptrdiff_t stride, int h)

  735. {

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

  737. 

  738.     if (h == 16) {

  739.         dst   += 8 * stride;

  740.         src   += 8 * stride;

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

  742.     }

  743.     return score;

  744. }

  745. #endif /* HAVE_ALTIVEC */

  746. 

  747. av_cold void ff_me_cmp_init_ppc(MECmpContext *c, AVCodecContext *avctx)

  748. {

  749. #if HAVE_ALTIVEC

  750.     if (!PPC_ALTIVEC(av_get_cpu_flags()))

  751.         return;

  752. 

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

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

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

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

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

  758. 

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

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

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

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

  763. 

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

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

  766. #endif /* HAVE_ALTIVEC */

  767. }