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FFmpeg/libavcodec/x86/mpegvideo.c

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  1. /*

  2.  * Optimized for ia32 CPUs by Nick Kurshev <nickols_k@mail.ru>

  3.  * h263, mpeg1, mpeg2 dequantizer & draw_edges by Michael Niedermayer <michaelni@gmx.at>

  4.  *

  5.  * This file is part of Libav.

  6.  *

  7.  * Libav is free software; you can redistribute it and/or

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

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

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

  11.  *

  12.  * Libav is distributed in the hope that it will be useful,

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

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

  15.  * Lesser General Public License for more details.

  16.  *

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

  18.  * License along with Libav; if not, write to the Free Software

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

  20.  */

  21. 

  22. #include "libavutil/attributes.h"

  23. #include "libavutil/cpu.h"

  24. #include "libavutil/x86/asm.h"

  25. #include "libavcodec/avcodec.h"

  26. #include "libavcodec/dsputil.h"

  27. #include "libavcodec/mpegvideo.h"

  28. #include "dsputil_mmx.h"

  29. 

  30. #if HAVE_INLINE_ASM

  31. 

  32. static void dct_unquantize_h263_intra_mmx(MpegEncContext *s,

  33.                                   int16_t *block, int n, int qscale)

  34. {

  35.     x86_reg level, qmul, qadd, nCoeffs;

  36. 

  37.     qmul = qscale << 1;

  38. 

  39.     assert(s->block_last_index[n]>=0 || s->h263_aic);

  40. 

  41.     if (!s->h263_aic) {

  42.         if (n < 4)

  43.             level = block[0] * s->y_dc_scale;

  44.         else

  45.             level = block[0] * s->c_dc_scale;

  46.         qadd = (qscale - 1) | 1;

  47.     }else{

  48.         qadd = 0;

  49.         level= block[0];

  50.     }

  51.     if(s->ac_pred)

  52.         nCoeffs=63;

  53.     else

  54.         nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];

  55. 

  56. __asm__ volatile(

  57.                 "movd %1, %%mm6                 \n\t" //qmul

  58.                 "packssdw %%mm6, %%mm6          \n\t"

  59.                 "packssdw %%mm6, %%mm6          \n\t"

  60.                 "movd %2, %%mm5                 \n\t" //qadd

  61.                 "pxor %%mm7, %%mm7              \n\t"

  62.                 "packssdw %%mm5, %%mm5          \n\t"

  63.                 "packssdw %%mm5, %%mm5          \n\t"

  64.                 "psubw %%mm5, %%mm7             \n\t"

  65.                 "pxor %%mm4, %%mm4              \n\t"

  66.                 ".p2align 4                     \n\t"

  67.                 "1:                             \n\t"

  68.                 "movq (%0, %3), %%mm0           \n\t"

  69.                 "movq 8(%0, %3), %%mm1          \n\t"

  70. 

  71.                 "pmullw %%mm6, %%mm0            \n\t"

  72.                 "pmullw %%mm6, %%mm1            \n\t"

  73. 

  74.                 "movq (%0, %3), %%mm2           \n\t"

  75.                 "movq 8(%0, %3), %%mm3          \n\t"

  76. 

  77.                 "pcmpgtw %%mm4, %%mm2           \n\t" // block[i] < 0 ? -1 : 0

  78.                 "pcmpgtw %%mm4, %%mm3           \n\t" // block[i] < 0 ? -1 : 0

  79. 

  80.                 "pxor %%mm2, %%mm0              \n\t"

  81.                 "pxor %%mm3, %%mm1              \n\t"

  82. 

  83.                 "paddw %%mm7, %%mm0             \n\t"

  84.                 "paddw %%mm7, %%mm1             \n\t"

  85. 

  86.                 "pxor %%mm0, %%mm2              \n\t"

  87.                 "pxor %%mm1, %%mm3              \n\t"

  88. 

  89.                 "pcmpeqw %%mm7, %%mm0           \n\t" // block[i] == 0 ? -1 : 0

  90.                 "pcmpeqw %%mm7, %%mm1           \n\t" // block[i] == 0 ? -1 : 0

  91. 

  92.                 "pandn %%mm2, %%mm0             \n\t"

  93.                 "pandn %%mm3, %%mm1             \n\t"

  94. 

  95.                 "movq %%mm0, (%0, %3)           \n\t"

  96.                 "movq %%mm1, 8(%0, %3)          \n\t"

  97. 

  98.                 "add $16, %3                    \n\t"

  99.                 "jng 1b                         \n\t"

  100.                 ::"r" (block+nCoeffs), "rm"(qmul), "rm" (qadd), "r" (2*(-nCoeffs))

  101.                 : "memory"

  102.         );

  103.         block[0]= level;

  104. }

  105. 

  106. 

  107. static void dct_unquantize_h263_inter_mmx(MpegEncContext *s,

  108.                                   int16_t *block, int n, int qscale)

  109. {

  110.     x86_reg qmul, qadd, nCoeffs;

  111. 

  112.     qmul = qscale << 1;

  113.     qadd = (qscale - 1) | 1;

  114. 

  115.     assert(s->block_last_index[n]>=0 || s->h263_aic);

  116. 

  117.     nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];

  118. 

  119. __asm__ volatile(

  120.                 "movd %1, %%mm6                 \n\t" //qmul

  121.                 "packssdw %%mm6, %%mm6          \n\t"

  122.                 "packssdw %%mm6, %%mm6          \n\t"

  123.                 "movd %2, %%mm5                 \n\t" //qadd

  124.                 "pxor %%mm7, %%mm7              \n\t"

  125.                 "packssdw %%mm5, %%mm5          \n\t"

  126.                 "packssdw %%mm5, %%mm5          \n\t"

  127.                 "psubw %%mm5, %%mm7             \n\t"

  128.                 "pxor %%mm4, %%mm4              \n\t"

  129.                 ".p2align 4                     \n\t"

  130.                 "1:                             \n\t"

  131.                 "movq (%0, %3), %%mm0           \n\t"

  132.                 "movq 8(%0, %3), %%mm1          \n\t"

  133. 

  134.                 "pmullw %%mm6, %%mm0            \n\t"

  135.                 "pmullw %%mm6, %%mm1            \n\t"

  136. 

  137.                 "movq (%0, %3), %%mm2           \n\t"

  138.                 "movq 8(%0, %3), %%mm3          \n\t"

  139. 

  140.                 "pcmpgtw %%mm4, %%mm2           \n\t" // block[i] < 0 ? -1 : 0

  141.                 "pcmpgtw %%mm4, %%mm3           \n\t" // block[i] < 0 ? -1 : 0

  142. 

  143.                 "pxor %%mm2, %%mm0              \n\t"

  144.                 "pxor %%mm3, %%mm1              \n\t"

  145. 

  146.                 "paddw %%mm7, %%mm0             \n\t"

  147.                 "paddw %%mm7, %%mm1             \n\t"

  148. 

  149.                 "pxor %%mm0, %%mm2              \n\t"

  150.                 "pxor %%mm1, %%mm3              \n\t"

  151. 

  152.                 "pcmpeqw %%mm7, %%mm0           \n\t" // block[i] == 0 ? -1 : 0

  153.                 "pcmpeqw %%mm7, %%mm1           \n\t" // block[i] == 0 ? -1 : 0

  154. 

  155.                 "pandn %%mm2, %%mm0             \n\t"

  156.                 "pandn %%mm3, %%mm1             \n\t"

  157. 

  158.                 "movq %%mm0, (%0, %3)           \n\t"

  159.                 "movq %%mm1, 8(%0, %3)          \n\t"

  160. 

  161.                 "add $16, %3                    \n\t"

  162.                 "jng 1b                         \n\t"

  163.                 ::"r" (block+nCoeffs), "rm"(qmul), "rm" (qadd), "r" (2*(-nCoeffs))

  164.                 : "memory"

  165.         );

  166. }

  167. 

  168. 

  169. /*

  170.   NK:

  171.   Note: looking at PARANOID:

  172.   "enable all paranoid tests for rounding, overflows, etc..."

  173. 

  174. #ifdef PARANOID

  175.                 if (level < -2048 || level > 2047)

  176.                     fprintf(stderr, "unquant error %d %d\n", i, level);

  177. #endif

  178.   We can suppose that result of two multiplications can't be greater than 0xFFFF

  179.   i.e. is 16-bit, so we use here only PMULLW instruction and can avoid

  180.   a complex multiplication.

  181. =====================================================

  182.  Full formula for multiplication of 2 integer numbers

  183.  which are represent as high:low words:

  184.  input: value1 = high1:low1

  185.         value2 = high2:low2

  186.  output: value3 = value1*value2

  187.  value3=high3:low3 (on overflow: modulus 2^32 wrap-around)

  188.  this mean that for 0x123456 * 0x123456 correct result is 0x766cb0ce4

  189.  but this algorithm will compute only 0x66cb0ce4

  190.  this limited by 16-bit size of operands

  191.  ---------------------------------

  192.  tlow1 = high1*low2

  193.  tlow2 = high2*low1

  194.  tlow1 = tlow1 + tlow2

  195.  high3:low3 = low1*low2

  196.  high3 += tlow1

  197. */

  198. static void dct_unquantize_mpeg1_intra_mmx(MpegEncContext *s,

  199.                                      int16_t *block, int n, int qscale)

  200. {

  201.     x86_reg nCoeffs;

  202.     const uint16_t *quant_matrix;

  203.     int block0;

  204. 

  205.     assert(s->block_last_index[n]>=0);

  206. 

  207.     nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ]+1;

  208. 

  209.     if (n < 4)

  210.         block0 = block[0] * s->y_dc_scale;

  211.     else

  212.         block0 = block[0] * s->c_dc_scale;

  213.     /* XXX: only mpeg1 */

  214.     quant_matrix = s->intra_matrix;

  215. __asm__ volatile(

  216.                 "pcmpeqw %%mm7, %%mm7           \n\t"

  217.                 "psrlw $15, %%mm7               \n\t"

  218.                 "movd %2, %%mm6                 \n\t"

  219.                 "packssdw %%mm6, %%mm6          \n\t"

  220.                 "packssdw %%mm6, %%mm6          \n\t"

  221.                 "mov %3, %%"REG_a"              \n\t"

  222.                 ".p2align 4                     \n\t"

  223.                 "1:                             \n\t"

  224.                 "movq (%0, %%"REG_a"), %%mm0    \n\t"

  225.                 "movq 8(%0, %%"REG_a"), %%mm1   \n\t"

  226.                 "movq (%1, %%"REG_a"), %%mm4    \n\t"

  227.                 "movq 8(%1, %%"REG_a"), %%mm5   \n\t"

  228.                 "pmullw %%mm6, %%mm4            \n\t" // q=qscale*quant_matrix[i]

  229.                 "pmullw %%mm6, %%mm5            \n\t" // q=qscale*quant_matrix[i]

  230.                 "pxor %%mm2, %%mm2              \n\t"

  231.                 "pxor %%mm3, %%mm3              \n\t"

  232.                 "pcmpgtw %%mm0, %%mm2           \n\t" // block[i] < 0 ? -1 : 0

  233.                 "pcmpgtw %%mm1, %%mm3           \n\t" // block[i] < 0 ? -1 : 0

  234.                 "pxor %%mm2, %%mm0              \n\t"

  235.                 "pxor %%mm3, %%mm1              \n\t"

  236.                 "psubw %%mm2, %%mm0             \n\t" // abs(block[i])

  237.                 "psubw %%mm3, %%mm1             \n\t" // abs(block[i])

  238.                 "pmullw %%mm4, %%mm0            \n\t" // abs(block[i])*q

  239.                 "pmullw %%mm5, %%mm1            \n\t" // abs(block[i])*q

  240.                 "pxor %%mm4, %%mm4              \n\t"

  241.                 "pxor %%mm5, %%mm5              \n\t" // FIXME slow

  242.                 "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0

  243.                 "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0

  244.                 "psraw $3, %%mm0                \n\t"

  245.                 "psraw $3, %%mm1                \n\t"

  246.                 "psubw %%mm7, %%mm0             \n\t"

  247.                 "psubw %%mm7, %%mm1             \n\t"

  248.                 "por %%mm7, %%mm0               \n\t"

  249.                 "por %%mm7, %%mm1               \n\t"

  250.                 "pxor %%mm2, %%mm0              \n\t"

  251.                 "pxor %%mm3, %%mm1              \n\t"

  252.                 "psubw %%mm2, %%mm0             \n\t"

  253.                 "psubw %%mm3, %%mm1             \n\t"

  254.                 "pandn %%mm0, %%mm4             \n\t"

  255.                 "pandn %%mm1, %%mm5             \n\t"

  256.                 "movq %%mm4, (%0, %%"REG_a")    \n\t"

  257.                 "movq %%mm5, 8(%0, %%"REG_a")   \n\t"

  258. 

  259.                 "add $16, %%"REG_a"             \n\t"

  260.                 "js 1b                          \n\t"

  261.                 ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "g" (-2*nCoeffs)

  262.                 : "%"REG_a, "memory"

  263.         );

  264.     block[0]= block0;

  265. }

  266. 

  267. static void dct_unquantize_mpeg1_inter_mmx(MpegEncContext *s,

  268.                                      int16_t *block, int n, int qscale)

  269. {

  270.     x86_reg nCoeffs;

  271.     const uint16_t *quant_matrix;

  272. 

  273.     assert(s->block_last_index[n]>=0);

  274. 

  275.     nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ]+1;

  276. 

  277.         quant_matrix = s->inter_matrix;

  278. __asm__ volatile(

  279.                 "pcmpeqw %%mm7, %%mm7           \n\t"

  280.                 "psrlw $15, %%mm7               \n\t"

  281.                 "movd %2, %%mm6                 \n\t"

  282.                 "packssdw %%mm6, %%mm6          \n\t"

  283.                 "packssdw %%mm6, %%mm6          \n\t"

  284.                 "mov %3, %%"REG_a"              \n\t"

  285.                 ".p2align 4                     \n\t"

  286.                 "1:                             \n\t"

  287.                 "movq (%0, %%"REG_a"), %%mm0    \n\t"

  288.                 "movq 8(%0, %%"REG_a"), %%mm1   \n\t"

  289.                 "movq (%1, %%"REG_a"), %%mm4    \n\t"

  290.                 "movq 8(%1, %%"REG_a"), %%mm5   \n\t"

  291.                 "pmullw %%mm6, %%mm4            \n\t" // q=qscale*quant_matrix[i]

  292.                 "pmullw %%mm6, %%mm5            \n\t" // q=qscale*quant_matrix[i]

  293.                 "pxor %%mm2, %%mm2              \n\t"

  294.                 "pxor %%mm3, %%mm3              \n\t"

  295.                 "pcmpgtw %%mm0, %%mm2           \n\t" // block[i] < 0 ? -1 : 0

  296.                 "pcmpgtw %%mm1, %%mm3           \n\t" // block[i] < 0 ? -1 : 0

  297.                 "pxor %%mm2, %%mm0              \n\t"

  298.                 "pxor %%mm3, %%mm1              \n\t"

  299.                 "psubw %%mm2, %%mm0             \n\t" // abs(block[i])

  300.                 "psubw %%mm3, %%mm1             \n\t" // abs(block[i])

  301.                 "paddw %%mm0, %%mm0             \n\t" // abs(block[i])*2

  302.                 "paddw %%mm1, %%mm1             \n\t" // abs(block[i])*2

  303.                 "paddw %%mm7, %%mm0             \n\t" // abs(block[i])*2 + 1

  304.                 "paddw %%mm7, %%mm1             \n\t" // abs(block[i])*2 + 1

  305.                 "pmullw %%mm4, %%mm0            \n\t" // (abs(block[i])*2 + 1)*q

  306.                 "pmullw %%mm5, %%mm1            \n\t" // (abs(block[i])*2 + 1)*q

  307.                 "pxor %%mm4, %%mm4              \n\t"

  308.                 "pxor %%mm5, %%mm5              \n\t" // FIXME slow

  309.                 "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0

  310.                 "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0

  311.                 "psraw $4, %%mm0                \n\t"

  312.                 "psraw $4, %%mm1                \n\t"

  313.                 "psubw %%mm7, %%mm0             \n\t"

  314.                 "psubw %%mm7, %%mm1             \n\t"

  315.                 "por %%mm7, %%mm0               \n\t"

  316.                 "por %%mm7, %%mm1               \n\t"

  317.                 "pxor %%mm2, %%mm0              \n\t"

  318.                 "pxor %%mm3, %%mm1              \n\t"

  319.                 "psubw %%mm2, %%mm0             \n\t"

  320.                 "psubw %%mm3, %%mm1             \n\t"

  321.                 "pandn %%mm0, %%mm4             \n\t"

  322.                 "pandn %%mm1, %%mm5             \n\t"

  323.                 "movq %%mm4, (%0, %%"REG_a")    \n\t"

  324.                 "movq %%mm5, 8(%0, %%"REG_a")   \n\t"

  325. 

  326.                 "add $16, %%"REG_a"             \n\t"

  327.                 "js 1b                          \n\t"

  328.                 ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "g" (-2*nCoeffs)

  329.                 : "%"REG_a, "memory"

  330.         );

  331. }

  332. 

  333. static void dct_unquantize_mpeg2_intra_mmx(MpegEncContext *s,

  334.                                      int16_t *block, int n, int qscale)

  335. {

  336.     x86_reg nCoeffs;

  337.     const uint16_t *quant_matrix;

  338.     int block0;

  339. 

  340.     assert(s->block_last_index[n]>=0);

  341. 

  342.     if(s->alternate_scan) nCoeffs= 63; //FIXME

  343.     else nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];

  344. 

  345.     if (n < 4)

  346.         block0 = block[0] * s->y_dc_scale;

  347.     else

  348.         block0 = block[0] * s->c_dc_scale;

  349.     quant_matrix = s->intra_matrix;

  350. __asm__ volatile(

  351.                 "pcmpeqw %%mm7, %%mm7           \n\t"

  352.                 "psrlw $15, %%mm7               \n\t"

  353.                 "movd %2, %%mm6                 \n\t"

  354.                 "packssdw %%mm6, %%mm6          \n\t"

  355.                 "packssdw %%mm6, %%mm6          \n\t"

  356.                 "mov %3, %%"REG_a"              \n\t"

  357.                 ".p2align 4                     \n\t"

  358.                 "1:                             \n\t"

  359.                 "movq (%0, %%"REG_a"), %%mm0    \n\t"

  360.                 "movq 8(%0, %%"REG_a"), %%mm1   \n\t"

  361.                 "movq (%1, %%"REG_a"), %%mm4    \n\t"

  362.                 "movq 8(%1, %%"REG_a"), %%mm5   \n\t"

  363.                 "pmullw %%mm6, %%mm4            \n\t" // q=qscale*quant_matrix[i]

  364.                 "pmullw %%mm6, %%mm5            \n\t" // q=qscale*quant_matrix[i]

  365.                 "pxor %%mm2, %%mm2              \n\t"

  366.                 "pxor %%mm3, %%mm3              \n\t"

  367.                 "pcmpgtw %%mm0, %%mm2           \n\t" // block[i] < 0 ? -1 : 0

  368.                 "pcmpgtw %%mm1, %%mm3           \n\t" // block[i] < 0 ? -1 : 0

  369.                 "pxor %%mm2, %%mm0              \n\t"

  370.                 "pxor %%mm3, %%mm1              \n\t"

  371.                 "psubw %%mm2, %%mm0             \n\t" // abs(block[i])

  372.                 "psubw %%mm3, %%mm1             \n\t" // abs(block[i])

  373.                 "pmullw %%mm4, %%mm0            \n\t" // abs(block[i])*q

  374.                 "pmullw %%mm5, %%mm1            \n\t" // abs(block[i])*q

  375.                 "pxor %%mm4, %%mm4              \n\t"

  376.                 "pxor %%mm5, %%mm5              \n\t" // FIXME slow

  377.                 "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0

  378.                 "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0

  379.                 "psraw $3, %%mm0                \n\t"

  380.                 "psraw $3, %%mm1                \n\t"

  381.                 "pxor %%mm2, %%mm0              \n\t"

  382.                 "pxor %%mm3, %%mm1              \n\t"

  383.                 "psubw %%mm2, %%mm0             \n\t"

  384.                 "psubw %%mm3, %%mm1             \n\t"

  385.                 "pandn %%mm0, %%mm4             \n\t"

  386.                 "pandn %%mm1, %%mm5             \n\t"

  387.                 "movq %%mm4, (%0, %%"REG_a")    \n\t"

  388.                 "movq %%mm5, 8(%0, %%"REG_a")   \n\t"

  389. 

  390.                 "add $16, %%"REG_a"             \n\t"

  391.                 "jng 1b                         \n\t"

  392.                 ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "g" (-2*nCoeffs)

  393.                 : "%"REG_a, "memory"

  394.         );

  395.     block[0]= block0;

  396.         //Note, we do not do mismatch control for intra as errors cannot accumulate

  397. }

  398. 

  399. static void dct_unquantize_mpeg2_inter_mmx(MpegEncContext *s,

  400.                                      int16_t *block, int n, int qscale)

  401. {

  402.     x86_reg nCoeffs;

  403.     const uint16_t *quant_matrix;

  404. 

  405.     assert(s->block_last_index[n]>=0);

  406. 

  407.     if(s->alternate_scan) nCoeffs= 63; //FIXME

  408.     else nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];

  409. 

  410.         quant_matrix = s->inter_matrix;

  411. __asm__ volatile(

  412.                 "pcmpeqw %%mm7, %%mm7           \n\t"

  413.                 "psrlq $48, %%mm7               \n\t"

  414.                 "movd %2, %%mm6                 \n\t"

  415.                 "packssdw %%mm6, %%mm6          \n\t"

  416.                 "packssdw %%mm6, %%mm6          \n\t"

  417.                 "mov %3, %%"REG_a"              \n\t"

  418.                 ".p2align 4                     \n\t"

  419.                 "1:                             \n\t"

  420.                 "movq (%0, %%"REG_a"), %%mm0    \n\t"

  421.                 "movq 8(%0, %%"REG_a"), %%mm1   \n\t"

  422.                 "movq (%1, %%"REG_a"), %%mm4    \n\t"

  423.                 "movq 8(%1, %%"REG_a"), %%mm5   \n\t"

  424.                 "pmullw %%mm6, %%mm4            \n\t" // q=qscale*quant_matrix[i]

  425.                 "pmullw %%mm6, %%mm5            \n\t" // q=qscale*quant_matrix[i]

  426.                 "pxor %%mm2, %%mm2              \n\t"

  427.                 "pxor %%mm3, %%mm3              \n\t"

  428.                 "pcmpgtw %%mm0, %%mm2           \n\t" // block[i] < 0 ? -1 : 0

  429.                 "pcmpgtw %%mm1, %%mm3           \n\t" // block[i] < 0 ? -1 : 0

  430.                 "pxor %%mm2, %%mm0              \n\t"

  431.                 "pxor %%mm3, %%mm1              \n\t"

  432.                 "psubw %%mm2, %%mm0             \n\t" // abs(block[i])

  433.                 "psubw %%mm3, %%mm1             \n\t" // abs(block[i])

  434.                 "paddw %%mm0, %%mm0             \n\t" // abs(block[i])*2

  435.                 "paddw %%mm1, %%mm1             \n\t" // abs(block[i])*2

  436.                 "pmullw %%mm4, %%mm0            \n\t" // abs(block[i])*2*q

  437.                 "pmullw %%mm5, %%mm1            \n\t" // abs(block[i])*2*q

  438.                 "paddw %%mm4, %%mm0             \n\t" // (abs(block[i])*2 + 1)*q

  439.                 "paddw %%mm5, %%mm1             \n\t" // (abs(block[i])*2 + 1)*q

  440.                 "pxor %%mm4, %%mm4              \n\t"

  441.                 "pxor %%mm5, %%mm5              \n\t" // FIXME slow

  442.                 "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0

  443.                 "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0

  444.                 "psrlw $4, %%mm0                \n\t"

  445.                 "psrlw $4, %%mm1                \n\t"

  446.                 "pxor %%mm2, %%mm0              \n\t"

  447.                 "pxor %%mm3, %%mm1              \n\t"

  448.                 "psubw %%mm2, %%mm0             \n\t"

  449.                 "psubw %%mm3, %%mm1             \n\t"

  450.                 "pandn %%mm0, %%mm4             \n\t"

  451.                 "pandn %%mm1, %%mm5             \n\t"

  452.                 "pxor %%mm4, %%mm7              \n\t"

  453.                 "pxor %%mm5, %%mm7              \n\t"

  454.                 "movq %%mm4, (%0, %%"REG_a")    \n\t"

  455.                 "movq %%mm5, 8(%0, %%"REG_a")   \n\t"

  456. 

  457.                 "add $16, %%"REG_a"             \n\t"

  458.                 "jng 1b                         \n\t"

  459.                 "movd 124(%0, %3), %%mm0        \n\t"

  460.                 "movq %%mm7, %%mm6              \n\t"

  461.                 "psrlq $32, %%mm7               \n\t"

  462.                 "pxor %%mm6, %%mm7              \n\t"

  463.                 "movq %%mm7, %%mm6              \n\t"

  464.                 "psrlq $16, %%mm7               \n\t"

  465.                 "pxor %%mm6, %%mm7              \n\t"

  466.                 "pslld $31, %%mm7               \n\t"

  467.                 "psrlq $15, %%mm7               \n\t"

  468.                 "pxor %%mm7, %%mm0              \n\t"

  469.                 "movd %%mm0, 124(%0, %3)        \n\t"

  470. 

  471.                 ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "r" (-2*nCoeffs)

  472.                 : "%"REG_a, "memory"

  473.         );

  474. }

  475. 

  476. static void  denoise_dct_mmx(MpegEncContext *s, int16_t *block){

  477.     const int intra= s->mb_intra;

  478.     int *sum= s->dct_error_sum[intra];

  479.     uint16_t *offset= s->dct_offset[intra];

  480. 

  481.     s->dct_count[intra]++;

  482. 

  483.     __asm__ volatile(

  484.         "pxor %%mm7, %%mm7                      \n\t"

  485.         "1:                                     \n\t"

  486.         "pxor %%mm0, %%mm0                      \n\t"

  487.         "pxor %%mm1, %%mm1                      \n\t"

  488.         "movq (%0), %%mm2                       \n\t"

  489.         "movq 8(%0), %%mm3                      \n\t"

  490.         "pcmpgtw %%mm2, %%mm0                   \n\t"

  491.         "pcmpgtw %%mm3, %%mm1                   \n\t"

  492.         "pxor %%mm0, %%mm2                      \n\t"

  493.         "pxor %%mm1, %%mm3                      \n\t"

  494.         "psubw %%mm0, %%mm2                     \n\t"

  495.         "psubw %%mm1, %%mm3                     \n\t"

  496.         "movq %%mm2, %%mm4                      \n\t"

  497.         "movq %%mm3, %%mm5                      \n\t"

  498.         "psubusw (%2), %%mm2                    \n\t"

  499.         "psubusw 8(%2), %%mm3                   \n\t"

  500.         "pxor %%mm0, %%mm2                      \n\t"

  501.         "pxor %%mm1, %%mm3                      \n\t"

  502.         "psubw %%mm0, %%mm2                     \n\t"

  503.         "psubw %%mm1, %%mm3                     \n\t"

  504.         "movq %%mm2, (%0)                       \n\t"

  505.         "movq %%mm3, 8(%0)                      \n\t"

  506.         "movq %%mm4, %%mm2                      \n\t"

  507.         "movq %%mm5, %%mm3                      \n\t"

  508.         "punpcklwd %%mm7, %%mm4                 \n\t"

  509.         "punpckhwd %%mm7, %%mm2                 \n\t"

  510.         "punpcklwd %%mm7, %%mm5                 \n\t"

  511.         "punpckhwd %%mm7, %%mm3                 \n\t"

  512.         "paddd (%1), %%mm4                      \n\t"

  513.         "paddd 8(%1), %%mm2                     \n\t"

  514.         "paddd 16(%1), %%mm5                    \n\t"

  515.         "paddd 24(%1), %%mm3                    \n\t"

  516.         "movq %%mm4, (%1)                       \n\t"

  517.         "movq %%mm2, 8(%1)                      \n\t"

  518.         "movq %%mm5, 16(%1)                     \n\t"

  519.         "movq %%mm3, 24(%1)                     \n\t"

  520.         "add $16, %0                            \n\t"

  521.         "add $32, %1                            \n\t"

  522.         "add $16, %2                            \n\t"

  523.         "cmp %3, %0                             \n\t"

  524.             " jb 1b                             \n\t"

  525.         : "+r" (block), "+r" (sum), "+r" (offset)

  526.         : "r"(block+64)

  527.     );

  528. }

  529. 

  530. static void  denoise_dct_sse2(MpegEncContext *s, int16_t *block){

  531.     const int intra= s->mb_intra;

  532.     int *sum= s->dct_error_sum[intra];

  533.     uint16_t *offset= s->dct_offset[intra];

  534. 

  535.     s->dct_count[intra]++;

  536. 

  537.     __asm__ volatile(

  538.         "pxor %%xmm7, %%xmm7                    \n\t"

  539.         "1:                                     \n\t"

  540.         "pxor %%xmm0, %%xmm0                    \n\t"

  541.         "pxor %%xmm1, %%xmm1                    \n\t"

  542.         "movdqa (%0), %%xmm2                    \n\t"

  543.         "movdqa 16(%0), %%xmm3                  \n\t"

  544.         "pcmpgtw %%xmm2, %%xmm0                 \n\t"

  545.         "pcmpgtw %%xmm3, %%xmm1                 \n\t"

  546.         "pxor %%xmm0, %%xmm2                    \n\t"

  547.         "pxor %%xmm1, %%xmm3                    \n\t"

  548.         "psubw %%xmm0, %%xmm2                   \n\t"

  549.         "psubw %%xmm1, %%xmm3                   \n\t"

  550.         "movdqa %%xmm2, %%xmm4                  \n\t"

  551.         "movdqa %%xmm3, %%xmm5                  \n\t"

  552.         "psubusw (%2), %%xmm2                   \n\t"

  553.         "psubusw 16(%2), %%xmm3                 \n\t"

  554.         "pxor %%xmm0, %%xmm2                    \n\t"

  555.         "pxor %%xmm1, %%xmm3                    \n\t"

  556.         "psubw %%xmm0, %%xmm2                   \n\t"

  557.         "psubw %%xmm1, %%xmm3                   \n\t"

  558.         "movdqa %%xmm2, (%0)                    \n\t"

  559.         "movdqa %%xmm3, 16(%0)                  \n\t"

  560.         "movdqa %%xmm4, %%xmm6                  \n\t"

  561.         "movdqa %%xmm5, %%xmm0                  \n\t"

  562.         "punpcklwd %%xmm7, %%xmm4               \n\t"

  563.         "punpckhwd %%xmm7, %%xmm6               \n\t"

  564.         "punpcklwd %%xmm7, %%xmm5               \n\t"

  565.         "punpckhwd %%xmm7, %%xmm0               \n\t"

  566.         "paddd (%1), %%xmm4                     \n\t"

  567.         "paddd 16(%1), %%xmm6                   \n\t"

  568.         "paddd 32(%1), %%xmm5                   \n\t"

  569.         "paddd 48(%1), %%xmm0                   \n\t"

  570.         "movdqa %%xmm4, (%1)                    \n\t"

  571.         "movdqa %%xmm6, 16(%1)                  \n\t"

  572.         "movdqa %%xmm5, 32(%1)                  \n\t"

  573.         "movdqa %%xmm0, 48(%1)                  \n\t"

  574.         "add $32, %0                            \n\t"

  575.         "add $64, %1                            \n\t"

  576.         "add $32, %2                            \n\t"

  577.         "cmp %3, %0                             \n\t"

  578.             " jb 1b                             \n\t"

  579.         : "+r" (block), "+r" (sum), "+r" (offset)

  580.         : "r"(block+64)

  581.           XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",

  582.                             "%xmm4", "%xmm5", "%xmm6", "%xmm7")

  583.     );

  584. }

  585. 

  586. #endif /* HAVE_INLINE_ASM */

  587. 

  588. av_cold void ff_MPV_common_init_x86(MpegEncContext *s)

  589. {

  590. #if HAVE_INLINE_ASM

  591.     int mm_flags = av_get_cpu_flags();

  592. 

  593.     if (mm_flags & AV_CPU_FLAG_MMX) {

  594.         s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_mmx;

  595.         s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_mmx;

  596.         s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_mmx;

  597.         s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_mmx;

  598.         if(!(s->flags & CODEC_FLAG_BITEXACT))

  599.             s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_mmx;

  600.         s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_mmx;

  601. 

  602.         if (mm_flags & AV_CPU_FLAG_SSE2) {

  603.             s->denoise_dct= denoise_dct_sse2;

  604.         } else {

  605.                 s->denoise_dct= denoise_dct_mmx;

  606.         }

  607.     }

  608. #endif /* HAVE_INLINE_ASM */

  609. }