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FFmpeg/libavcodec/x86/idct_mmx.c

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  1. /*

  2.  * idct_mmx.c

  3.  * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>

  4.  *

  5.  * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.

  6.  * See http://libmpeg2.sourceforge.net/ for updates.

  7.  *

  8.  * mpeg2dec is free software; you can redistribute it and/or modify

  9.  * it under the terms of the GNU General Public License as published by

  10.  * the Free Software Foundation; either version 2 of the License, or

  11.  * (at your option) any later version.

  12.  *

  13.  * mpeg2dec 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

  16.  * GNU General Public License for more details.

  17.  *

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

  19.  * along with mpeg2dec; if not, write to the Free Software

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

  21.  */

  22. 

  23. #include "libavutil/common.h"

  24. #include "libavcodec/dsputil.h"

  25. 

  26. #include "libavutil/x86_cpu.h"

  27. #include "dsputil_mmx.h"

  28. 

  29. #define ROW_SHIFT 11

  30. #define COL_SHIFT 6

  31. 

  32. #define round(bias) ((int)(((bias)+0.5) * (1<<ROW_SHIFT)))

  33. #define rounder(bias) {round (bias), round (bias)}

  34. 

  35. 

  36. #if 0

  37. /* C row IDCT - it is just here to document the MMXEXT and MMX versions */

  38. static inline void idct_row (int16_t * row, int offset,

  39.                              int16_t * table, int32_t * rounder)

  40. {

  41.     int C1, C2, C3, C4, C5, C6, C7;

  42.     int a0, a1, a2, a3, b0, b1, b2, b3;

  43. 

  44.     row += offset;

  45. 

  46.     C1 = table[1];

  47.     C2 = table[2];

  48.     C3 = table[3];

  49.     C4 = table[4];

  50.     C5 = table[5];

  51.     C6 = table[6];

  52.     C7 = table[7];

  53. 

  54.     a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6] + *rounder;

  55.     a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6] + *rounder;

  56.     a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6] + *rounder;

  57.     a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6] + *rounder;

  58. 

  59.     b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7];

  60.     b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7];

  61.     b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7];

  62.     b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7];

  63. 

  64.     row[0] = (a0 + b0) >> ROW_SHIFT;

  65.     row[1] = (a1 + b1) >> ROW_SHIFT;

  66.     row[2] = (a2 + b2) >> ROW_SHIFT;

  67.     row[3] = (a3 + b3) >> ROW_SHIFT;

  68.     row[4] = (a3 - b3) >> ROW_SHIFT;

  69.     row[5] = (a2 - b2) >> ROW_SHIFT;

  70.     row[6] = (a1 - b1) >> ROW_SHIFT;

  71.     row[7] = (a0 - b0) >> ROW_SHIFT;

  72. }

  73. #endif

  74. 

  75. 

  76. /* MMXEXT row IDCT */

  77. 

  78. #define mmxext_table(c1,c2,c3,c4,c5,c6,c7)      {  c4,  c2, -c4, -c2,   \

  79.                                                    c4,  c6,  c4,  c6,   \

  80.                                                    c1,  c3, -c1, -c5,   \

  81.                                                    c5,  c7,  c3, -c7,   \

  82.                                                    c4, -c6,  c4, -c6,   \

  83.                                                   -c4,  c2,  c4, -c2,   \

  84.                                                    c5, -c1,  c3, -c1,   \

  85.                                                    c7,  c3,  c7, -c5 }

  86. 

  87. static inline void mmxext_row_head (int16_t * const row, const int offset,

  88.                                     const int16_t * const table)

  89. {

  90.     __asm__ volatile(

  91.         "movq     (%0), %%mm2        \n\t"  /* mm2 = x6 x4 x2 x0 */

  92. 

  93.         "movq    8(%0), %%mm5        \n\t"  /* mm5 = x7 x5 x3 x1 */

  94.         "movq    %%mm2, %%mm0        \n\t"  /* mm0 = x6 x4 x2 x0 */

  95. 

  96.         "movq     (%1), %%mm3        \n\t"  /* mm3 = -C2 -C4 C2 C4 */

  97.         "movq    %%mm5, %%mm6        \n\t"  /* mm6 = x7 x5 x3 x1 */

  98. 

  99.         "movq    8(%1), %%mm4        \n\t"  /* mm4 = C6 C4 C6 C4 */

  100.         "pmaddwd %%mm0, %%mm3        \n\t"  /* mm3 = -C4*x4-C2*x6 C4*x0+C2*x2 */

  101. 

  102.         "pshufw  $0x4e, %%mm2, %%mm2 \n\t"  /* mm2 = x2 x0 x6 x4 */

  103.         :: "r" ((row+offset)), "r" (table)

  104.     );

  105. }

  106. 

  107. static inline void mmxext_row (const int16_t * const table,

  108.                                const int32_t * const rounder)

  109. {

  110.     __asm__ volatile (

  111.         "movq    16(%0), %%mm1         \n\t" /* mm1 = -C5 -C1 C3 C1 */

  112.         "pmaddwd  %%mm2, %%mm4         \n\t" /* mm4 = C4*x0+C6*x2 C4*x4+C6*x6 */

  113. 

  114.         "pmaddwd 32(%0), %%mm0         \n\t" /* mm0 = C4*x4-C6*x6 C4*x0-C6*x2 */

  115.         "pshufw   $0x4e, %%mm6, %%mm6  \n\t" /* mm6 = x3 x1 x7 x5 */

  116. 

  117.         "movq    24(%0), %%mm7         \n\t" /* mm7 = -C7 C3 C7 C5 */

  118.         "pmaddwd  %%mm5, %%mm1         \n\t" /* mm1= -C1*x5-C5*x7 C1*x1+C3*x3 */

  119. 

  120.         "paddd     (%1), %%mm3         \n\t" /* mm3 += rounder */

  121.         "pmaddwd  %%mm6, %%mm7         \n\t" /* mm7 = C3*x1-C7*x3 C5*x5+C7*x7 */

  122. 

  123.         "pmaddwd 40(%0), %%mm2         \n\t" /* mm2= C4*x0-C2*x2 -C4*x4+C2*x6 */

  124.         "paddd    %%mm4, %%mm3         \n\t" /* mm3 = a1 a0 + rounder */

  125. 

  126.         "pmaddwd 48(%0), %%mm5         \n\t" /* mm5 = C3*x5-C1*x7 C5*x1-C1*x3 */

  127.         "movq     %%mm3, %%mm4         \n\t" /* mm4 = a1 a0 + rounder */

  128. 

  129.         "pmaddwd 56(%0), %%mm6         \n\t" /* mm6 = C7*x1-C5*x3 C7*x5+C3*x7 */

  130.         "paddd    %%mm7, %%mm1         \n\t" /* mm1 = b1 b0 */

  131. 

  132.         "paddd     (%1), %%mm0         \n\t" /* mm0 += rounder */

  133.         "psubd    %%mm1, %%mm3         \n\t" /* mm3 = a1-b1 a0-b0 + rounder */

  134. 

  135.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm3         \n\t" /* mm3 = y6 y7 */

  136.         "paddd    %%mm4, %%mm1         \n\t" /* mm1 = a1+b1 a0+b0 + rounder */

  137. 

  138.         "paddd    %%mm2, %%mm0         \n\t" /* mm0 = a3 a2 + rounder */

  139.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm1         \n\t" /* mm1 = y1 y0 */

  140. 

  141.         "paddd    %%mm6, %%mm5         \n\t" /* mm5 = b3 b2 */

  142.         "movq     %%mm0, %%mm4         \n\t" /* mm4 = a3 a2 + rounder */

  143. 

  144.         "paddd    %%mm5, %%mm0         \n\t" /* mm0 = a3+b3 a2+b2 + rounder */

  145.         "psubd    %%mm5, %%mm4         \n\t" /* mm4 = a3-b3 a2-b2 + rounder */

  146.         : : "r" (table), "r" (rounder));

  147. }

  148. 

  149. static inline void mmxext_row_tail (int16_t * const row, const int store)

  150. {

  151.     __asm__ volatile (

  152.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm0        \n\t"  /* mm0 = y3 y2 */

  153. 

  154.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm4  \n\t"  /* mm4 = y4 y5 */

  155. 

  156.         "packssdw %%mm0, %%mm1        \n\t"  /* mm1 = y3 y2 y1 y0 */

  157. 

  158.         "packssdw %%mm3, %%mm4        \n\t"  /* mm4 = y6 y7 y4 y5 */

  159. 

  160.         "movq     %%mm1, (%0)         \n\t"  /* save y3 y2 y1 y0 */

  161.         "pshufw   $0xb1, %%mm4, %%mm4 \n\t"  /* mm4 = y7 y6 y5 y4 */

  162. 

  163.         /* slot */

  164. 

  165.         "movq     %%mm4, 8(%0)        \n\t"  /* save y7 y6 y5 y4 */

  166.         :: "r" (row+store)

  167.         );

  168. }

  169. 

  170. static inline void mmxext_row_mid (int16_t * const row, const int store,

  171.                                    const int offset,

  172.                                    const int16_t * const table)

  173. {

  174.     __asm__ volatile (

  175.         "movq     (%0,%1), %%mm2       \n\t" /* mm2 = x6 x4 x2 x0 */

  176.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm0 \n\t"   /* mm0 = y3 y2 */

  177. 

  178.         "movq    8(%0,%1), %%mm5       \n\t" /* mm5 = x7 x5 x3 x1 */

  179.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm4 \n\t" /* mm4 = y4 y5 */

  180. 

  181.         "packssdw   %%mm0, %%mm1       \n\t" /* mm1 = y3 y2 y1 y0 */

  182.         "movq       %%mm5, %%mm6       \n\t" /* mm6 = x7 x5 x3 x1 */

  183. 

  184.         "packssdw   %%mm3, %%mm4       \n\t" /* mm4 = y6 y7 y4 y5 */

  185.         "movq       %%mm2, %%mm0       \n\t" /* mm0 = x6 x4 x2 x0 */

  186. 

  187.         "movq       %%mm1, (%0,%2)     \n\t" /* save y3 y2 y1 y0 */

  188.         "pshufw     $0xb1, %%mm4, %%mm4\n\t" /* mm4 = y7 y6 y5 y4 */

  189. 

  190.         "movq        (%3), %%mm3       \n\t" /* mm3 = -C2 -C4 C2 C4 */

  191.         "movq       %%mm4, 8(%0,%2)    \n\t" /* save y7 y6 y5 y4 */

  192. 

  193.         "pmaddwd    %%mm0, %%mm3       \n\t" /* mm3= -C4*x4-C2*x6 C4*x0+C2*x2 */

  194. 

  195.         "movq       8(%3), %%mm4       \n\t" /* mm4 = C6 C4 C6 C4 */

  196.         "pshufw     $0x4e, %%mm2, %%mm2\n\t" /* mm2 = x2 x0 x6 x4 */

  197.         :: "r" (row), "r" ((x86_reg) (2*offset)), "r" ((x86_reg) (2*store)), "r" (table)

  198.         );

  199. }

  200. 

  201. 

  202. /* MMX row IDCT */

  203. 

  204. #define mmx_table(c1,c2,c3,c4,c5,c6,c7) {  c4,  c2,  c4,  c6,   \

  205.                                            c4,  c6, -c4, -c2,   \

  206.                                            c1,  c3,  c3, -c7,   \

  207.                                            c5,  c7, -c1, -c5,   \

  208.                                            c4, -c6,  c4, -c2,   \

  209.                                           -c4,  c2,  c4, -c6,   \

  210.                                            c5, -c1,  c7, -c5,   \

  211.                                            c7,  c3,  c3, -c1 }

  212. 

  213. static inline void mmx_row_head (int16_t * const row, const int offset,

  214.                                  const int16_t * const table)

  215. {

  216.     __asm__ volatile (

  217.         "movq (%0), %%mm2       \n\t"    /* mm2 = x6 x4 x2 x0 */

  218. 

  219.         "movq 8(%0), %%mm5      \n\t"    /* mm5 = x7 x5 x3 x1 */

  220.         "movq %%mm2, %%mm0      \n\t"    /* mm0 = x6 x4 x2 x0 */

  221. 

  222.         "movq (%1), %%mm3       \n\t"    /* mm3 = C6 C4 C2 C4 */

  223.         "movq %%mm5, %%mm6      \n\t"    /* mm6 = x7 x5 x3 x1 */

  224. 

  225.         "punpckldq %%mm0, %%mm0 \n\t"    /* mm0 = x2 x0 x2 x0 */

  226. 

  227.         "movq 8(%1), %%mm4      \n\t"    /* mm4 = -C2 -C4 C6 C4 */

  228.         "pmaddwd %%mm0, %%mm3   \n\t"    /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */

  229. 

  230.         "movq 16(%1), %%mm1     \n\t"    /* mm1 = -C7 C3 C3 C1 */

  231.         "punpckhdq %%mm2, %%mm2 \n\t"    /* mm2 = x6 x4 x6 x4 */

  232.         :: "r" ((row+offset)), "r" (table)

  233.         );

  234. }

  235. 

  236. static inline void mmx_row (const int16_t * const table,

  237.                             const int32_t * const rounder)

  238. {

  239.     __asm__ volatile (

  240.         "pmaddwd   %%mm2, %%mm4    \n\t"  /* mm4 = -C4*x4-C2*x6 C4*x4+C6*x6 */

  241.         "punpckldq %%mm5, %%mm5    \n\t"  /* mm5 = x3 x1 x3 x1 */

  242. 

  243.         "pmaddwd  32(%0), %%mm0    \n\t"  /* mm0 = C4*x0-C2*x2 C4*x0-C6*x2 */

  244.         "punpckhdq %%mm6, %%mm6    \n\t"  /* mm6 = x7 x5 x7 x5 */

  245. 

  246.         "movq     24(%0), %%mm7    \n\t"  /* mm7 = -C5 -C1 C7 C5 */

  247.         "pmaddwd   %%mm5, %%mm1    \n\t"  /* mm1 = C3*x1-C7*x3 C1*x1+C3*x3 */

  248. 

  249.         "paddd      (%1), %%mm3    \n\t"  /* mm3 += rounder */

  250.         "pmaddwd   %%mm6, %%mm7    \n\t"  /* mm7 = -C1*x5-C5*x7 C5*x5+C7*x7 */

  251. 

  252.         "pmaddwd  40(%0), %%mm2    \n\t"  /* mm2 = C4*x4-C6*x6 -C4*x4+C2*x6 */

  253.         "paddd     %%mm4, %%mm3    \n\t"  /* mm3 = a1 a0 + rounder */

  254. 

  255.         "pmaddwd  48(%0), %%mm5    \n\t"  /* mm5 = C7*x1-C5*x3 C5*x1-C1*x3 */

  256.         "movq      %%mm3, %%mm4    \n\t"  /* mm4 = a1 a0 + rounder */

  257. 

  258.         "pmaddwd  56(%0), %%mm6    \n\t"  /* mm6 = C3*x5-C1*x7 C7*x5+C3*x7 */

  259.         "paddd     %%mm7, %%mm1    \n\t"  /* mm1 = b1 b0 */

  260. 

  261.         "paddd      (%1), %%mm0    \n\t"  /* mm0 += rounder */

  262.         "psubd     %%mm1, %%mm3    \n\t"  /* mm3 = a1-b1 a0-b0 + rounder */

  263. 

  264.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm3    \n\t"  /* mm3 = y6 y7 */

  265.         "paddd     %%mm4, %%mm1    \n\t"  /* mm1 = a1+b1 a0+b0 + rounder */

  266. 

  267.         "paddd     %%mm2, %%mm0    \n\t"  /* mm0 = a3 a2 + rounder */

  268.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm1    \n\t"  /* mm1 = y1 y0 */

  269. 

  270.         "paddd     %%mm6, %%mm5    \n\t"  /* mm5 = b3 b2 */

  271.         "movq      %%mm0, %%mm7    \n\t"  /* mm7 = a3 a2 + rounder */

  272. 

  273.         "paddd     %%mm5, %%mm0    \n\t"  /* mm0 = a3+b3 a2+b2 + rounder */

  274.         "psubd     %%mm5, %%mm7    \n\t"  /* mm7 = a3-b3 a2-b2 + rounder */

  275.         :: "r" (table), "r" (rounder)

  276.         );

  277. }

  278. 

  279. static inline void mmx_row_tail (int16_t * const row, const int store)

  280. {

  281.     __asm__ volatile (

  282.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm0      \n\t" /* mm0 = y3 y2 */

  283. 

  284.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm7      \n\t" /* mm7 = y4 y5 */

  285. 

  286.         "packssdw %%mm0, %%mm1 \n\t" /* mm1 = y3 y2 y1 y0 */

  287. 

  288.         "packssdw %%mm3, %%mm7 \n\t" /* mm7 = y6 y7 y4 y5 */

  289. 

  290.         "movq %%mm1, (%0)      \n\t" /* save y3 y2 y1 y0 */

  291.         "movq %%mm7, %%mm4     \n\t" /* mm4 = y6 y7 y4 y5 */

  292. 

  293.         "pslld $16, %%mm7      \n\t" /* mm7 = y7 0 y5 0 */

  294. 

  295.         "psrld $16, %%mm4      \n\t" /* mm4 = 0 y6 0 y4 */

  296. 

  297.         "por %%mm4, %%mm7      \n\t" /* mm7 = y7 y6 y5 y4 */

  298. 

  299.         /* slot */

  300. 

  301.         "movq %%mm7, 8(%0)     \n\t" /* save y7 y6 y5 y4 */

  302.         :: "r" (row+store)

  303.         );

  304. }

  305. 

  306. static inline void mmx_row_mid (int16_t * const row, const int store,

  307.                                 const int offset, const int16_t * const table)

  308. {

  309. 

  310.     __asm__ volatile (

  311.         "movq    (%0,%1), %%mm2    \n\t" /* mm2 = x6 x4 x2 x0 */

  312.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm0 \n\t" /* mm0 = y3 y2 */

  313. 

  314.         "movq   8(%0,%1), %%mm5    \n\t" /* mm5 = x7 x5 x3 x1 */

  315.         "psrad $" AV_STRINGIFY(ROW_SHIFT) ", %%mm7 \n\t" /* mm7 = y4 y5 */

  316. 

  317.         "packssdw  %%mm0, %%mm1    \n\t" /* mm1 = y3 y2 y1 y0 */

  318.         "movq      %%mm5, %%mm6    \n\t" /* mm6 = x7 x5 x3 x1 */

  319. 

  320.         "packssdw  %%mm3, %%mm7    \n\t" /* mm7 = y6 y7 y4 y5 */

  321.         "movq      %%mm2, %%mm0    \n\t" /* mm0 = x6 x4 x2 x0 */

  322. 

  323.         "movq      %%mm1, (%0,%2)  \n\t" /* save y3 y2 y1 y0 */

  324.         "movq      %%mm7, %%mm1    \n\t" /* mm1 = y6 y7 y4 y5 */

  325. 

  326.         "punpckldq %%mm0, %%mm0    \n\t" /* mm0 = x2 x0 x2 x0 */

  327.         "psrld       $16, %%mm7    \n\t" /* mm7 = 0 y6 0 y4 */

  328. 

  329.         "movq       (%3), %%mm3    \n\t" /* mm3 = C6 C4 C2 C4 */

  330.         "pslld       $16, %%mm1    \n\t" /* mm1 = y7 0 y5 0 */

  331. 

  332.         "movq      8(%3), %%mm4    \n\t" /* mm4 = -C2 -C4 C6 C4 */

  333.         "por       %%mm1, %%mm7    \n\t" /* mm7 = y7 y6 y5 y4 */

  334. 

  335.         "movq     16(%3), %%mm1    \n\t" /* mm1 = -C7 C3 C3 C1 */

  336.         "punpckhdq %%mm2, %%mm2    \n\t" /* mm2 = x6 x4 x6 x4 */

  337. 

  338.         "movq      %%mm7, 8(%0,%2) \n\t" /* save y7 y6 y5 y4 */

  339.         "pmaddwd   %%mm0, %%mm3    \n\t" /* mm3 = C4*x0+C6*x2 C4*x0+C2*x2 */

  340.         : : "r" (row), "r" ((x86_reg) (2*offset)), "r" ((x86_reg) (2*store)), "r" (table)

  341.         );

  342. }

  343. 

  344. 

  345. #if 0

  346. /* C column IDCT - it is just here to document the MMXEXT and MMX versions */

  347. static inline void idct_col (int16_t * col, int offset)

  348. {

  349. /* multiplication - as implemented on mmx */

  350. #define F(c,x) (((c) * (x)) >> 16)

  351. 

  352. /* saturation - it helps us handle torture test cases */

  353. #define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x))

  354. 

  355.     int16_t x0, x1, x2, x3, x4, x5, x6, x7;

  356.     int16_t y0, y1, y2, y3, y4, y5, y6, y7;

  357.     int16_t a0, a1, a2, a3, b0, b1, b2, b3;

  358.     int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12;

  359. 

  360.     col += offset;

  361. 

  362.     x0 = col[0*8];

  363.     x1 = col[1*8];

  364.     x2 = col[2*8];

  365.     x3 = col[3*8];

  366.     x4 = col[4*8];

  367.     x5 = col[5*8];

  368.     x6 = col[6*8];

  369.     x7 = col[7*8];

  370. 

  371.     u04 = S (x0 + x4);

  372.     v04 = S (x0 - x4);

  373.     u26 = S (F (T2, x6) + x2);

  374.     v26 = S (F (T2, x2) - x6);

  375. 

  376.     a0 = S (u04 + u26);

  377.     a1 = S (v04 + v26);

  378.     a2 = S (v04 - v26);

  379.     a3 = S (u04 - u26);

  380. 

  381.     u17 = S (F (T1, x7) + x1);

  382.     v17 = S (F (T1, x1) - x7);

  383.     u35 = S (F (T3, x5) + x3);

  384.     v35 = S (F (T3, x3) - x5);

  385. 

  386.     b0 = S (u17 + u35);

  387.     b3 = S (v17 - v35);

  388.     u12 = S (u17 - u35);

  389.     v12 = S (v17 + v35);

  390.     u12 = S (2 * F (C4, u12));

  391.     v12 = S (2 * F (C4, v12));

  392.     b1 = S (u12 + v12);

  393.     b2 = S (u12 - v12);

  394. 

  395.     y0 = S (a0 + b0) >> COL_SHIFT;

  396.     y1 = S (a1 + b1) >> COL_SHIFT;

  397.     y2 = S (a2 + b2) >> COL_SHIFT;

  398.     y3 = S (a3 + b3) >> COL_SHIFT;

  399. 

  400.     y4 = S (a3 - b3) >> COL_SHIFT;

  401.     y5 = S (a2 - b2) >> COL_SHIFT;

  402.     y6 = S (a1 - b1) >> COL_SHIFT;

  403.     y7 = S (a0 - b0) >> COL_SHIFT;

  404. 

  405.     col[0*8] = y0;

  406.     col[1*8] = y1;

  407.     col[2*8] = y2;

  408.     col[3*8] = y3;

  409.     col[4*8] = y4;

  410.     col[5*8] = y5;

  411.     col[6*8] = y6;

  412.     col[7*8] = y7;

  413. }

  414. #endif

  415. 

  416. 

  417. /* MMX column IDCT */

  418. static inline void idct_col (int16_t * const col, const int offset)

  419. {

  420. #define T1 13036

  421. #define T2 27146

  422. #define T3 43790

  423. #define C4 23170

  424. 

  425.     DECLARE_ALIGNED(8, static const short, t1_vector)[] = {

  426.         T1,T1,T1,T1,

  427.         T2,T2,T2,T2,

  428.         T3,T3,T3,T3,

  429.         C4,C4,C4,C4

  430.     };

  431. 

  432.     /* column code adapted from Peter Gubanov */

  433.     /* http://www.elecard.com/peter/idct.shtml */

  434. 

  435.     __asm__ volatile (

  436.         "movq      (%0), %%mm0    \n\t" /* mm0 = T1 */

  437. 

  438.         "movq   2*8(%1), %%mm1    \n\t" /* mm1 = x1 */

  439.         "movq     %%mm0, %%mm2    \n\t" /* mm2 = T1 */

  440. 

  441.         "movq 7*2*8(%1), %%mm4    \n\t" /* mm4 = x7 */

  442.         "pmulhw   %%mm1, %%mm0    \n\t" /* mm0 = T1*x1 */

  443. 

  444.         "movq    16(%0), %%mm5    \n\t" /* mm5 = T3 */

  445.         "pmulhw   %%mm4, %%mm2    \n\t" /* mm2 = T1*x7 */

  446. 

  447.         "movq 2*5*8(%1), %%mm6    \n\t" /* mm6 = x5 */

  448.         "movq     %%mm5, %%mm7    \n\t" /* mm7 = T3-1 */

  449. 

  450.         "movq 3*8*2(%1), %%mm3    \n\t" /* mm3 = x3 */

  451.         "psubsw   %%mm4, %%mm0    \n\t" /* mm0 = v17 */

  452. 

  453.         "movq     8(%0), %%mm4    \n\t" /* mm4 = T2 */

  454.         "pmulhw   %%mm3, %%mm5    \n\t" /* mm5 = (T3-1)*x3 */

  455. 

  456.         "paddsw   %%mm2, %%mm1    \n\t" /* mm1 = u17 */

  457.         "pmulhw   %%mm6, %%mm7    \n\t" /* mm7 = (T3-1)*x5 */

  458. 

  459.         /* slot */

  460. 

  461.         "movq     %%mm4, %%mm2    \n\t" /* mm2 = T2 */

  462.         "paddsw   %%mm3, %%mm5    \n\t" /* mm5 = T3*x3 */

  463. 

  464.         "pmulhw 2*8*2(%1), %%mm4  \n\t" /* mm4 = T2*x2 */

  465.         "paddsw   %%mm6, %%mm7    \n\t" /* mm7 = T3*x5 */

  466. 

  467.         "psubsw   %%mm6, %%mm5    \n\t" /* mm5 = v35 */

  468.         "paddsw   %%mm3, %%mm7    \n\t" /* mm7 = u35 */

  469. 

  470.         "movq 6*8*2(%1), %%mm3    \n\t" /* mm3 = x6 */

  471.         "movq     %%mm0, %%mm6    \n\t" /* mm6 = v17 */

  472. 

  473.         "pmulhw   %%mm3, %%mm2    \n\t" /* mm2 = T2*x6 */

  474.         "psubsw   %%mm5, %%mm0    \n\t" /* mm0 = b3 */

  475. 

  476.         "psubsw   %%mm3, %%mm4    \n\t" /* mm4 = v26 */

  477.         "paddsw   %%mm6, %%mm5    \n\t" /* mm5 = v12 */

  478. 

  479.         "movq     %%mm0, 3*8*2(%1)\n\t" /* save b3 in scratch0 */

  480.         "movq     %%mm1, %%mm6    \n\t" /* mm6 = u17 */

  481. 

  482.         "paddsw 2*8*2(%1), %%mm2  \n\t" /* mm2 = u26 */

  483.         "paddsw   %%mm7, %%mm6    \n\t" /* mm6 = b0 */

  484. 

  485.         "psubsw   %%mm7, %%mm1    \n\t" /* mm1 = u12 */

  486.         "movq     %%mm1, %%mm7    \n\t" /* mm7 = u12 */

  487. 

  488.         "movq   0*8(%1), %%mm3    \n\t" /* mm3 = x0 */

  489.         "paddsw   %%mm5, %%mm1    \n\t" /* mm1 = u12+v12 */

  490. 

  491.         "movq    24(%0), %%mm0    \n\t" /* mm0 = C4/2 */

  492.         "psubsw   %%mm5, %%mm7    \n\t" /* mm7 = u12-v12 */

  493. 

  494.         "movq     %%mm6, 5*8*2(%1)\n\t" /* save b0 in scratch1 */

  495.         "pmulhw   %%mm0, %%mm1    \n\t" /* mm1 = b1/2 */

  496. 

  497.         "movq     %%mm4, %%mm6    \n\t" /* mm6 = v26 */

  498.         "pmulhw   %%mm0, %%mm7    \n\t" /* mm7 = b2/2 */

  499. 

  500.         "movq 4*8*2(%1), %%mm5    \n\t" /* mm5 = x4 */

  501.         "movq     %%mm3, %%mm0    \n\t" /* mm0 = x0 */

  502. 

  503.         "psubsw   %%mm5, %%mm3    \n\t" /* mm3 = v04 */

  504.         "paddsw   %%mm5, %%mm0    \n\t" /* mm0 = u04 */

  505. 

  506.         "paddsw   %%mm3, %%mm4    \n\t" /* mm4 = a1 */

  507.         "movq     %%mm0, %%mm5    \n\t" /* mm5 = u04 */

  508. 

  509.         "psubsw   %%mm6, %%mm3    \n\t" /* mm3 = a2 */

  510.         "paddsw   %%mm2, %%mm5    \n\t" /* mm5 = a0 */

  511. 

  512.         "paddsw   %%mm1, %%mm1    \n\t" /* mm1 = b1 */

  513.         "psubsw   %%mm2, %%mm0    \n\t" /* mm0 = a3 */

  514. 

  515.         "paddsw   %%mm7, %%mm7    \n\t" /* mm7 = b2 */

  516.         "movq     %%mm3, %%mm2    \n\t" /* mm2 = a2 */

  517. 

  518.         "movq     %%mm4, %%mm6    \n\t" /* mm6 = a1 */

  519.         "paddsw   %%mm7, %%mm3    \n\t" /* mm3 = a2+b2 */

  520. 

  521.         "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm3\n\t" /* mm3 = y2 */

  522.         "paddsw   %%mm1, %%mm4\n\t" /* mm4 = a1+b1 */

  523. 

  524.         "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm4\n\t" /* mm4 = y1 */

  525.         "psubsw   %%mm1, %%mm6    \n\t" /* mm6 = a1-b1 */

  526. 

  527.         "movq 5*8*2(%1), %%mm1    \n\t" /* mm1 = b0 */

  528.         "psubsw   %%mm7, %%mm2    \n\t" /* mm2 = a2-b2 */

  529. 

  530.         "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm6\n\t" /* mm6 = y6 */

  531.         "movq     %%mm5, %%mm7    \n\t" /* mm7 = a0 */

  532. 

  533.         "movq     %%mm4, 1*8*2(%1)\n\t" /* save y1 */

  534.         "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm2\n\t" /* mm2 = y5 */

  535. 

  536.         "movq     %%mm3, 2*8*2(%1)\n\t" /* save y2 */

  537.         "paddsw   %%mm1, %%mm5    \n\t" /* mm5 = a0+b0 */

  538. 

  539.         "movq 3*8*2(%1), %%mm4    \n\t" /* mm4 = b3 */

  540.         "psubsw   %%mm1, %%mm7    \n\t" /* mm7 = a0-b0 */

  541. 

  542.         "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm5\n\t" /* mm5 = y0 */

  543.         "movq     %%mm0, %%mm3    \n\t" /* mm3 = a3 */

  544. 

  545.         "movq     %%mm2, 5*8*2(%1)\n\t" /* save y5 */

  546.         "psubsw   %%mm4, %%mm3    \n\t" /* mm3 = a3-b3 */

  547. 

  548.         "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm7\n\t" /* mm7 = y7 */

  549.         "paddsw   %%mm0, %%mm4    \n\t" /* mm4 = a3+b3 */

  550. 

  551.         "movq     %%mm5, 0*8*2(%1)\n\t" /* save y0 */

  552.         "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm3\n\t" /* mm3 = y4 */

  553. 

  554.         "movq     %%mm6, 6*8*2(%1)\n\t" /* save y6 */

  555.         "psraw $" AV_STRINGIFY(COL_SHIFT) ", %%mm4\n\t" /* mm4 = y3 */

  556. 

  557.         "movq     %%mm7, 7*8*2(%1)\n\t" /* save y7 */

  558. 

  559.         "movq     %%mm3, 4*8*2(%1)\n\t" /* save y4 */

  560. 

  561.         "movq     %%mm4, 3*8*2(%1)\n\t" /* save y3 */

  562.         :: "r" (t1_vector), "r" (col+offset)

  563.         );

  564. 

  565. #undef T1

  566. #undef T2

  567. #undef T3

  568. #undef C4

  569. }

  570. 

  571. 

  572. DECLARE_ALIGNED(8, static const int32_t, rounder0)[] =

  573.     rounder ((1 << (COL_SHIFT - 1)) - 0.5);

  574. DECLARE_ALIGNED(8, static const int32_t, rounder4)[] = rounder (0);

  575. DECLARE_ALIGNED(8, static const int32_t, rounder1)[] =

  576.     rounder (1.25683487303);        /* C1*(C1/C4+C1+C7)/2 */

  577. DECLARE_ALIGNED(8, static const int32_t, rounder7)[] =

  578.     rounder (-0.25);                /* C1*(C7/C4+C7-C1)/2 */

  579. DECLARE_ALIGNED(8, static const int32_t, rounder2)[] =

  580.     rounder (0.60355339059);        /* C2 * (C6+C2)/2 */

  581. DECLARE_ALIGNED(8, static const int32_t, rounder6)[] =

  582.     rounder (-0.25);                /* C2 * (C6-C2)/2 */

  583. DECLARE_ALIGNED(8, static const int32_t, rounder3)[] =

  584.     rounder (0.087788325588);       /* C3*(-C3/C4+C3+C5)/2 */

  585. DECLARE_ALIGNED(8, static const int32_t, rounder5)[] =

  586.     rounder (-0.441341716183);      /* C3*(-C5/C4+C5-C3)/2 */

  587. 

  588. #undef COL_SHIFT

  589. #undef ROW_SHIFT

  590. 

  591. #define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \

  592. void idct (int16_t * const block)                                       \

  593. {                                                                       \

  594.     DECLARE_ALIGNED(16, static const int16_t, table04)[] =              \

  595.         table (22725, 21407, 19266, 16384, 12873,  8867, 4520);         \

  596.     DECLARE_ALIGNED(16, static const int16_t, table17)[] =              \

  597.         table (31521, 29692, 26722, 22725, 17855, 12299, 6270);         \

  598.     DECLARE_ALIGNED(16, static const int16_t, table26)[] =              \

  599.         table (29692, 27969, 25172, 21407, 16819, 11585, 5906);         \

  600.     DECLARE_ALIGNED(16, static const int16_t, table35)[] =              \

  601.         table (26722, 25172, 22654, 19266, 15137, 10426, 5315);         \

  602.                                                                         \

  603.     idct_row_head (block, 0*8, table04);                                \

  604.     idct_row (table04, rounder0);                                       \

  605.     idct_row_mid (block, 0*8, 4*8, table04);                            \

  606.     idct_row (table04, rounder4);                                       \

  607.     idct_row_mid (block, 4*8, 1*8, table17);                            \

  608.     idct_row (table17, rounder1);                                       \

  609.     idct_row_mid (block, 1*8, 7*8, table17);                            \

  610.     idct_row (table17, rounder7);                                       \

  611.     idct_row_mid (block, 7*8, 2*8, table26);                            \

  612.     idct_row (table26, rounder2);                                       \

  613.     idct_row_mid (block, 2*8, 6*8, table26);                            \

  614.     idct_row (table26, rounder6);                                       \

  615.     idct_row_mid (block, 6*8, 3*8, table35);                            \

  616.     idct_row (table35, rounder3);                                       \

  617.     idct_row_mid (block, 3*8, 5*8, table35);                            \

  618.     idct_row (table35, rounder5);                                       \

  619.     idct_row_tail (block, 5*8);                                         \

  620.                                                                         \

  621.     idct_col (block, 0);                                                \

  622.     idct_col (block, 4);                                                \

  623. }

  624. 

  625. declare_idct (ff_mmxext_idct, mmxext_table,

  626.               mmxext_row_head, mmxext_row, mmxext_row_tail, mmxext_row_mid)

  627. 

  628. declare_idct (ff_mmx_idct, mmx_table,

  629.               mmx_row_head, mmx_row, mmx_row_tail, mmx_row_mid)