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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 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. 

  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. 

  39. #if HAVE_BIGENDIAN

  40. #define GET_PERM(per1, per2, pix) {\

  41.     per1 = vec_lvsl(0, pix);\

  42.     per2 = vec_add(per1, vec_splat_u8(1));\

  43. }

  44. #define LOAD_PIX(v, iv, pix, per1, per2) {\

  45.     vector unsigned char pix2l  = vec_ld(0,  pix);\

  46.     vector unsigned char pix2r  = vec_ld(16, pix);\

  47.     v  = vec_perm(pix2l, pix2r, per1);\

  48.     iv = vec_perm(pix2l, pix2r, per2);\

  49. }

  50. #else

  51. #define GET_PERM(per1, per2, pix) {}

  52. #define LOAD_PIX(v, iv, pix, per1, per2) {\

  53.     v  = vec_vsx_ld(0,  pix);\

  54.     iv = vec_vsx_ld(1,  pix);\

  55. }

  56. #endif

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

  58.                             int line_size, int h)

  59. {

  60.     int i;

  61.     int __attribute__((aligned(16))) s = 0;

  62.     const vector unsigned char zero =

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

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

  65.     vector signed int sumdiffs;

  66.     vector unsigned char perm1, perm2, pix2v, pix2iv;

  67. 

  68.     GET_PERM(perm1, perm2, pix2);

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

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

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

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

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

  74.         LOAD_PIX(pix2v, pix2iv, pix2, perm1, perm2);

  75. 

  76.         /* Calculate the average vector. */

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

  78. 

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

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

  81.                                           vec_min(pix1v, avgv));

  82. 

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

  84.         sad = vec_sum4s(t5, sad);

  85. 

  86.         pix1 += line_size;

  87.         pix2 += line_size;

  88.     }

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

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

  91.     sumdiffs = vec_splat(sumdiffs, 3);

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

  93. 

  94.     return s;

  95. }

  96. 

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

  98.                             int line_size, int h)

  99. {

  100.     int i;

  101.     int  __attribute__((aligned(16))) s = 0;

  102.     const vector unsigned char zero =

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

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

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

  106.     vector signed int sumdiffs;

  107. 

  108.     uint8_t *pix3 = pix2 + line_size;

  109. 

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

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

  112.      * fact to avoid a potentially expensive unaligned read, each

  113.      * time around the loop.

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

  115.      * pix2v: pix2[0] - pix2[15]

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

  117.     vector unsigned char pix2v = VEC_LD(0, pix2);

  118. 

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

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

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

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

  123.         pix1v = vec_ld(0,  pix1);

  124.         pix3v = VEC_LD(0,  pix3);

  125. 

  126.         /* Calculate the average vector. */

  127.         avgv = vec_avg(pix2v, pix3v);

  128. 

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

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

  131. 

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

  133.         sad = vec_sum4s(t5, sad);

  134. 

  135.         pix1 += line_size;

  136.         pix2v = pix3v;

  137.         pix3 += line_size;

  138.     }

  139. 

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

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

  142.     sumdiffs = vec_splat(sumdiffs, 3);

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

  144.     return s;

  145. }

  146. 

  147. static int sad16_xy2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  148.                              int line_size, int h)

  149. {

  150.     int i;

  151.     int  __attribute__((aligned(16))) s = 0;

  152.     uint8_t *pix3 = pix2 + line_size;

  153.     const vector unsigned char zero =

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

  155.     const vector unsigned short two =

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

  157.     vector unsigned char avgv, t5;

  158.     vector unsigned char pix1v, pix3v, pix3iv;

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

  160.     vector unsigned short avghv, avglv;

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

  162.     vector signed int sumdiffs;

  163.     vector unsigned char perm1, perm2, pix2v, pix2iv;

  164.     GET_PERM(perm1, perm2, pix2);

  165. 

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

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

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

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

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

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

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

  173.     LOAD_PIX(pix2v, pix2iv, pix2, perm1, perm2);

  174.     vector unsigned short pix2hv  =

  175.         (vector unsigned short) VEC_MERGEH(zero, pix2v);

  176.     vector unsigned short pix2lv  =

  177.         (vector unsigned short) VEC_MERGEL(zero, pix2v);

  178.     vector unsigned short pix2ihv =

  179.         (vector unsigned short) VEC_MERGEH(zero, pix2iv);

  180.     vector unsigned short pix2ilv =

  181.         (vector unsigned short) VEC_MERGEL(zero, pix2iv);

  182. 

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

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

  185.     vector unsigned short t3, t4;

  186. 

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

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

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

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

  191.         pix1v  = vec_ld(0, pix1);

  192.         LOAD_PIX(pix3v, pix3iv, pix3, perm1, perm2);

  193. 

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

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

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

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

  198.          * vectors of shorts and do the averaging by hand. */

  199. 

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

  201.         pix3hv  = (vector unsigned short) VEC_MERGEH(zero, pix3v);

  202.         pix3lv  = (vector unsigned short) VEC_MERGEL(zero, pix3v);

  203.         pix3ihv = (vector unsigned short) VEC_MERGEH(zero, pix3iv);

  204.         pix3ilv = (vector unsigned short) VEC_MERGEL(zero, pix3iv);

  205. 

  206.         /* Do the averaging on them. */

  207.         t3 = vec_add(pix3hv, pix3ihv);

  208.         t4 = vec_add(pix3lv, pix3ilv);

  209. 

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

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

  212. 

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

  214.         avgv = vec_pack(avghv, avglv);

  215. 

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

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

  218. 

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

  220.         sad = vec_sum4s(t5, sad);

  221. 

  222.         pix1 += line_size;

  223.         pix3 += line_size;

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

  225.         t1 = t3;

  226.         t2 = t4;

  227.     }

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

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

  230.     sumdiffs = vec_splat(sumdiffs, 3);

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

  232. 

  233.     return s;

  234. }

  235. 

  236. static int sad16_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  237.                          int line_size, int h)

  238. {

  239.     int i;

  240.     int  __attribute__((aligned(16))) s;

  241.     const vector unsigned int zero =

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

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

  244.     vector signed int sumdiffs;

  245. 

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

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

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

  249.         vector unsigned char t2 = VEC_LD(0, pix2);

  250. 

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

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

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

  254.         vector unsigned char 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(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,

  272.                         int line_size, int h)

  273. {

  274.     int i;

  275.     int  __attribute__((aligned(16))) s;

  276.     const vector unsigned int zero =

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

  278.     const vector unsigned char permclear =

  279.         (vector unsigned char)

  280.         { 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0 };

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

  282.     vector signed int sumdiffs;

  283. 

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

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

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

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

  288.         vector unsigned char pix1l = VEC_LD(0, pix1);

  289.         vector unsigned char pix2l = VEC_LD(0, pix2);

  290.         vector unsigned char t1 = vec_and(pix1l, permclear);

  291.         vector unsigned char t2 = vec_and(pix2l, 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 += line_size;

  302.         pix2 += line_size;

  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.                         int line_size, int h)

  317. {

  318.     int i;

  319.     int  __attribute__((aligned(16))) s;

  320.     const vector unsigned int zero =

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

  322.     const vector unsigned char permclear =

  323.         (vector unsigned char)

  324.         { 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0 };

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

  326.     vector signed int sumsqr;

  327. 

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

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

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

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

  332.         vector unsigned char t1 = vec_and(VEC_LD(0, pix1), permclear);

  333.         vector unsigned char t2 = vec_and(VEC_LD(0, pix2), permclear);

  334. 

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

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

  337. 

  338.         /* Calculate abs differences vector. */

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

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

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

  342. 

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

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

  345. 

  346.         pix1 += line_size;

  347.         pix2 += line_size;

  348.     }

  349. 

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

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

  352.     sumsqr = vec_splat(sumsqr, 3);

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

  354. 

  355.     return s;

  356. }

  357. 

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

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

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

  361.                          int line_size, int h)

  362. {

  363.     int i;

  364.     int  __attribute__((aligned(16))) s;

  365.     const vector unsigned int zero =

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

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

  368.     vector signed int sumsqr;

  369. 

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

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

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

  373.         vector unsigned char t2 = VEC_LD(0, pix2);

  374. 

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

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

  377. 

  378.         /* Calculate abs differences vector. */

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

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

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

  382. 

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

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

  385. 

  386.         pix1 += line_size;

  387.         pix2 += line_size;

  388.     }

  389. 

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

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

  392.     sumsqr = vec_splat(sumsqr, 3);

  393. 

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

  395.     return s;

  396. }

  397. 

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

  399.                                      uint8_t *src, int stride, int h)

  400. {

  401.     int __attribute__((aligned(16))) sum;

  402.     register const vector unsigned char vzero =

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

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

  405.                                  temp5, temp6, temp7;

  406.     {

  407.         register const vector signed short vprod1 =

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

  409.         register const vector signed short vprod2 =

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

  411.         register const vector signed short vprod3 =

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

  413.         register const vector unsigned char perm1 =

  414.             (const vector unsigned char)

  415.             { 0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,

  416.               0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D };

  417.         register const vector unsigned char perm2 =

  418.             (const vector unsigned char)

  419.             { 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,

  420.               0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B };

  421.         register const vector unsigned char perm3 =

  422.             (const vector unsigned char)

  423.             { 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,

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

  425. 

  426. 

  427. #define ONEITERBUTTERFLY(i, res)                                            \

  428.     {                                                                       \

  429.         register vector unsigned char srcO =  unaligned_load(stride * i, src);  \

  430.         register vector unsigned char dstO = unaligned_load(stride * i, dst);\

  431.                                                                             \

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

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

  434.         register vector signed short srcV =                                 \

  435.             (vector signed short) VEC_MERGEH((vector signed char) vzero,    \

  436.                                              (vector signed char) srcO);    \

  437.         register vector signed short dstV =                                 \

  438.             (vector signed short) VEC_MERGEH((vector signed char) vzero,    \

  439.                                              (vector signed char) dstO);    \

  440.                                                                             \

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

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

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

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

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

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

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

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

  449.     }

  450. 

  451.         ONEITERBUTTERFLY(0, temp0);

  452.         ONEITERBUTTERFLY(1, temp1);

  453.         ONEITERBUTTERFLY(2, temp2);

  454.         ONEITERBUTTERFLY(3, temp3);

  455.         ONEITERBUTTERFLY(4, temp4);

  456.         ONEITERBUTTERFLY(5, temp5);

  457.         ONEITERBUTTERFLY(6, temp6);

  458.         ONEITERBUTTERFLY(7, temp7);

  459.     }

  460. #undef ONEITERBUTTERFLY

  461.     {

  462.         register vector signed int vsum;

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

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

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

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

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

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

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

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

  471. 

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

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

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

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

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

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

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

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

  480. 

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

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

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

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

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

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

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

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

  489. 

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

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

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

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

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

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

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

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

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

  499.         vsum = vec_splat(vsum, 3);

  500. 

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

  502.     }

  503.     return sum;

  504. }

  505. 

  506. /*

  507.  * 16x8 works with 16 elements; it allows to avoid replicating loads, and

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

  509.  * inside hadamard8_diff16_altivec.

  510.  *

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

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

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

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

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

  516.  *

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

  518.  * 7450, and its code isn't much faster than gcc-3.3 on the 7450 (but uses

  519.  * 25% fewer instructions...)

  520.  *

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

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

  523.  */

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

  525.                                       uint8_t *src, int stride, int h)

  526. {

  527.     int __attribute__((aligned(16))) sum;

  528.     register vector signed short

  529.         temp0 __asm__ ("v0"),

  530.         temp1 __asm__ ("v1"),

  531.         temp2 __asm__ ("v2"),

  532.         temp3 __asm__ ("v3"),

  533.         temp4 __asm__ ("v4"),

  534.         temp5 __asm__ ("v5"),

  535.         temp6 __asm__ ("v6"),

  536.         temp7 __asm__ ("v7");

  537.     register vector signed short

  538.         temp0S __asm__ ("v8"),

  539.         temp1S __asm__ ("v9"),

  540.         temp2S __asm__ ("v10"),

  541.         temp3S __asm__ ("v11"),

  542.         temp4S __asm__ ("v12"),

  543.         temp5S __asm__ ("v13"),

  544.         temp6S __asm__ ("v14"),

  545.         temp7S __asm__ ("v15");

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

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

  548.     {

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

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

  551. 

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

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

  554. 

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

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

  557. 

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

  559.             (const vector unsigned char)

  560.             { 0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,

  561.               0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D };

  562. 

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

  564.             (const vector unsigned char)

  565.             { 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,

  566.               0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B };

  567. 

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

  569.             (const vector unsigned char)

  570.             { 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,

  571.               0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };

  572. 

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

  574.     {                                                                       \

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

  576.             unaligned_load(stride * i, src);                                    \

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

  578.             unaligned_load(stride * i, dst);\

  579.                                                                             \

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

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

  582.             (vector signed short) VEC_MERGEH((vector signed char) vzero,    \

  583.                                              (vector signed char) srcO);    \

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

  585.             (vector signed short) VEC_MERGEH((vector signed char) vzero,    \

  586.                                              (vector signed char) dstO);    \

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

  588.             (vector signed short) VEC_MERGEL((vector signed char) vzero,    \

  589.                                              (vector signed char) srcO);    \

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

  591.             (vector signed short) VEC_MERGEL((vector signed char) vzero,    \

  592.                                              (vector signed char) dstO);    \

  593.                                                                             \

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

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

  596.             vec_sub(srcV, dstV);                                            \

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

  598.             vec_sub(srcW, dstW);                                            \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  621.     }

  622. 

  623.         ONEITERBUTTERFLY(0, temp0, temp0S);

  624.         ONEITERBUTTERFLY(1, temp1, temp1S);

  625.         ONEITERBUTTERFLY(2, temp2, temp2S);

  626.         ONEITERBUTTERFLY(3, temp3, temp3S);

  627.         ONEITERBUTTERFLY(4, temp4, temp4S);

  628.         ONEITERBUTTERFLY(5, temp5, temp5S);

  629.         ONEITERBUTTERFLY(6, temp6, temp6S);

  630.         ONEITERBUTTERFLY(7, temp7, temp7S);

  631.     }

  632. #undef ONEITERBUTTERFLY

  633.     {

  634.         register vector signed int vsum;

  635. 

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

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

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

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

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

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

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

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

  644. 

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

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

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

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

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

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

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

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

  653. 

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

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

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

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

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

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

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

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

  662. 

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

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

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

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

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

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

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

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

  671. 

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

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

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

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

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

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

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

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

  680. 

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

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

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

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

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

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

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

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

  689. 

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

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

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

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

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

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

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

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

  698. 

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

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

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

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

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

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

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

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

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

  708.         vsum = vec_splat(vsum, 3);

  709. 

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

  711.     }

  712.     return sum;

  713. }

  714. 

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

  716.                                     uint8_t *src, int stride, int h)

  717. {

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

  719. 

  720.     if (h == 16) {

  721.         dst   += 8 * stride;

  722.         src   += 8 * stride;

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

  724.     }

  725.     return score;

  726. }

  727. #endif /* HAVE_ALTIVEC */

  728. 

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

  730. {

  731. #if HAVE_ALTIVEC

  732.     if (!PPC_ALTIVEC(av_get_cpu_flags()))

  733.         return;

  734. 

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

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

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

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

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

  740. 

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

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

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

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

  745. 

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

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

  748. #endif /* HAVE_ALTIVEC */

  749. }