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FFmpeg/libavcodec/i386/mpegvideo_mmx_template.c

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  1. /*

  2.  * MPEG video MMX templates

  3.  *

  4.  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>

  5.  *

  6.  * This library is free software; you can redistribute it and/or

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

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

  9.  * version 2 of the License, or (at your option) any later version.

  10.  *

  11.  * This library is distributed in the hope that it will be useful,

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

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

  14.  * Lesser General Public License for more details.

  15.  *

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

  17.  * License along with this library; if not, write to the Free Software

  18.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  19.  */

  20. #undef SPREADW

  21. #undef PMAXW

  22. #ifdef HAVE_MMX2

  23. #define SPREADW(a) "pshufw $0, " #a ", " #a " \n\t"

  24. #define PMAXW(a,b) "pmaxsw " #a ", " #b " \n\t"

  25. 

  26. #else

  27. #define SPREADW(a) \

  28. 	"punpcklwd " #a ", " #a " \n\t"\

  29. 	"punpcklwd " #a ", " #a " \n\t"

  30. #define PMAXW(a,b) \

  31. 	"psubusw " #a ", " #b " \n\t"\

  32. 	"paddw " #a ", " #b " \n\t"

  33. #endif

  34. 

  35. static int RENAME(dct_quantize)(MpegEncContext *s,

  36.                             DCTELEM *block, int n,

  37.                             int qscale, int *overflow)

  38. {

  39.     int level=0, last_non_zero_p1, q; //=0 is cuz gcc says uninitalized ...

  40.     const UINT16 *qmat, *bias;

  41.     static __align8 INT16 temp_block[64];

  42. 

  43.     //s->fdct (block);

  44.     ff_fdct_mmx (block); //cant be anything else ...

  45. 

  46.     if (s->mb_intra) {

  47.         int dummy;

  48.         if (n < 4)

  49.             q = s->y_dc_scale;

  50.         else

  51.             q = s->c_dc_scale;

  52.         /* note: block[0] is assumed to be positive */

  53.         if (!s->h263_aic) {

  54. #if 1

  55.         asm volatile (

  56.         	"xorl %%edx, %%edx	\n\t"

  57.         	"mul %%ecx		\n\t"

  58.         	: "=d" (level), "=a"(dummy)

  59.         	: "a" ((block[0]>>2) + q), "c" (inverse[q<<1])

  60.         );

  61. #else

  62.         asm volatile (

  63.         	"xorl %%edx, %%edx	\n\t"

  64.         	"divw %%cx		\n\t"

  65.         	"movzwl %%ax, %%eax	\n\t"

  66.         	: "=a" (level)

  67.         	: "a" ((block[0]>>2) + q), "c" (q<<1)

  68.         	: "%edx"

  69.         );

  70. #endif

  71.         } else

  72.             /* For AIC we skip quant/dequant of INTRADC */

  73.             level = (block[0] + 4)>>3;

  74.             

  75.         block[0]=0; //avoid fake overflow

  76. //        temp_block[0] = (block[0] + (q >> 1)) / q;

  77.         last_non_zero_p1 = 1;

  78.         bias = s->q_intra_matrix16_bias[qscale];

  79.         qmat = s->q_intra_matrix16[qscale];

  80.     } else {

  81.         last_non_zero_p1 = 0;

  82.         bias = s->q_inter_matrix16_bias[qscale];

  83.         qmat = s->q_inter_matrix16[qscale];

  84.     }

  85. 

  86.     if(s->out_format == FMT_H263 && s->mpeg_quant==0){

  87.     

  88.         asm volatile(

  89.             "movd %%eax, %%mm3			\n\t" // last_non_zero_p1

  90.             SPREADW(%%mm3)

  91.             "pxor %%mm7, %%mm7			\n\t" // 0

  92.             "pxor %%mm4, %%mm4			\n\t" // 0

  93.             "movq (%2), %%mm5			\n\t" // qmat[0]

  94.             "pxor %%mm6, %%mm6			\n\t"

  95.             "psubw (%3), %%mm6			\n\t" // -bias[0]

  96.             "movl $-128, %%eax			\n\t"

  97.             ".balign 16				\n\t"

  98.             "1:					\n\t"

  99.             "pxor %%mm1, %%mm1			\n\t" // 0

  100.             "movq (%1, %%eax), %%mm0		\n\t" // block[i]

  101.             "pcmpgtw %%mm0, %%mm1		\n\t" // block[i] <= 0 ? 0xFF : 0x00

  102.             "pxor %%mm1, %%mm0			\n\t" 

  103.             "psubw %%mm1, %%mm0			\n\t" // ABS(block[i])

  104.             "psubusw %%mm6, %%mm0		\n\t" // ABS(block[i]) + bias[0]

  105.             "pmulhw %%mm5, %%mm0		\n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16

  106.             "por %%mm0, %%mm4			\n\t" 

  107.             "pxor %%mm1, %%mm0			\n\t" 

  108.             "psubw %%mm1, %%mm0			\n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])

  109.             "movq %%mm0, (%5, %%eax)		\n\t"

  110.             "pcmpeqw %%mm7, %%mm0		\n\t" // out==0 ? 0xFF : 0x00

  111.             "movq (%4, %%eax), %%mm1		\n\t" 

  112.             "movq %%mm7, (%1, %%eax)		\n\t" // 0

  113.             "pandn %%mm1, %%mm0			\n\t"

  114. 	    PMAXW(%%mm0, %%mm3)

  115.             "addl $8, %%eax			\n\t"

  116.             " js 1b				\n\t"

  117.             "movq %%mm3, %%mm0			\n\t"

  118.             "psrlq $32, %%mm3			\n\t"

  119. 	    PMAXW(%%mm0, %%mm3)

  120.             "movq %%mm3, %%mm0			\n\t"

  121.             "psrlq $16, %%mm3			\n\t"

  122. 	    PMAXW(%%mm0, %%mm3)

  123.             "movd %%mm3, %%eax			\n\t"

  124.             "movzbl %%al, %%eax			\n\t" // last_non_zero_p1

  125. 	    : "+a" (last_non_zero_p1)

  126.             : "r" (block+64), "r" (qmat), "r" (bias),

  127.               "r" (inv_zigzag_direct16+64), "r" (temp_block+64)

  128.         );

  129.         // note the asm is split cuz gcc doesnt like that many operands ...

  130.         asm volatile(

  131.             "movd %1, %%mm1			\n\t" // max_qcoeff

  132. 	    SPREADW(%%mm1)

  133.             "psubusw %%mm1, %%mm4		\n\t" 

  134.             "packuswb %%mm4, %%mm4		\n\t"

  135.             "movd %%mm4, %0			\n\t" // *overflow

  136.         : "=g" (*overflow)

  137.         : "g" (s->max_qcoeff)

  138.         );

  139.     }else{ // FMT_H263

  140.         asm volatile(

  141.             "movd %%eax, %%mm3			\n\t" // last_non_zero_p1

  142.             SPREADW(%%mm3)

  143.             "pxor %%mm7, %%mm7			\n\t" // 0

  144.             "pxor %%mm4, %%mm4			\n\t" // 0

  145.             "movl $-128, %%eax			\n\t"

  146.             ".balign 16				\n\t"

  147.             "1:					\n\t"

  148.             "pxor %%mm1, %%mm1			\n\t" // 0

  149.             "movq (%1, %%eax), %%mm0		\n\t" // block[i]

  150.             "pcmpgtw %%mm0, %%mm1		\n\t" // block[i] <= 0 ? 0xFF : 0x00

  151.             "pxor %%mm1, %%mm0			\n\t" 

  152.             "psubw %%mm1, %%mm0			\n\t" // ABS(block[i])

  153.             "movq (%3, %%eax), %%mm6		\n\t" // bias[0]

  154.             "paddusw %%mm6, %%mm0		\n\t" // ABS(block[i]) + bias[0]

  155.             "movq (%2, %%eax), %%mm5		\n\t" // qmat[i]

  156.             "pmulhw %%mm5, %%mm0		\n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16

  157.             "por %%mm0, %%mm4			\n\t" 

  158.             "pxor %%mm1, %%mm0			\n\t" 

  159.             "psubw %%mm1, %%mm0			\n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])

  160.             "movq %%mm0, (%5, %%eax)		\n\t"

  161.             "pcmpeqw %%mm7, %%mm0		\n\t" // out==0 ? 0xFF : 0x00

  162.             "movq (%4, %%eax), %%mm1		\n\t" 

  163.             "movq %%mm7, (%1, %%eax)		\n\t" // 0

  164.             "pandn %%mm1, %%mm0			\n\t"

  165. 	    PMAXW(%%mm0, %%mm3)

  166.             "addl $8, %%eax			\n\t"

  167.             " js 1b				\n\t"

  168.             "movq %%mm3, %%mm0			\n\t"

  169.             "psrlq $32, %%mm3			\n\t"

  170. 	    PMAXW(%%mm0, %%mm3)

  171.             "movq %%mm3, %%mm0			\n\t"

  172.             "psrlq $16, %%mm3			\n\t"

  173. 	    PMAXW(%%mm0, %%mm3)

  174.             "movd %%mm3, %%eax			\n\t"

  175.             "movzbl %%al, %%eax			\n\t" // last_non_zero_p1

  176. 	    : "+a" (last_non_zero_p1)

  177.             : "r" (block+64), "r" (qmat+64), "r" (bias+64),

  178.               "r" (inv_zigzag_direct16+64), "r" (temp_block+64)

  179.         );

  180.         // note the asm is split cuz gcc doesnt like that many operands ...

  181.         asm volatile(

  182.             "movd %1, %%mm1			\n\t" // max_qcoeff

  183. 	    SPREADW(%%mm1)

  184.             "psubusw %%mm1, %%mm4		\n\t" 

  185.             "packuswb %%mm4, %%mm4		\n\t"

  186.             "movd %%mm4, %0			\n\t" // *overflow

  187.         : "=g" (*overflow)

  188.         : "g" (s->max_qcoeff)

  189.         );

  190.     }

  191. 

  192.     if(s->mb_intra) block[0]= level;

  193.     else            block[0]= temp_block[0];

  194. 

  195.     if(s->idct_permutation[1]==8){

  196.         if(last_non_zero_p1 <= 1) goto end;

  197.         block[0x08] = temp_block[0x01]; block[0x10] = temp_block[0x08]; 

  198.         block[0x20] = temp_block[0x10]; 

  199.         if(last_non_zero_p1 <= 4) goto end;

  200.         block[0x18] = temp_block[0x09]; block[0x04] = temp_block[0x02]; 

  201.         block[0x09] = temp_block[0x03]; 

  202.         if(last_non_zero_p1 <= 7) goto end;

  203.         block[0x14] = temp_block[0x0A]; block[0x28] = temp_block[0x11]; 

  204.         block[0x12] = temp_block[0x18]; block[0x02] = temp_block[0x20]; 

  205.         if(last_non_zero_p1 <= 11) goto end;

  206.         block[0x1A] = temp_block[0x19]; block[0x24] = temp_block[0x12]; 

  207.         block[0x19] = temp_block[0x0B]; block[0x01] = temp_block[0x04]; 

  208.         block[0x0C] = temp_block[0x05]; 

  209.         if(last_non_zero_p1 <= 16) goto end;

  210.         block[0x11] = temp_block[0x0C]; block[0x29] = temp_block[0x13]; 

  211.         block[0x16] = temp_block[0x1A]; block[0x0A] = temp_block[0x21]; 

  212.         block[0x30] = temp_block[0x28]; block[0x22] = temp_block[0x30]; 

  213.         block[0x38] = temp_block[0x29]; block[0x06] = temp_block[0x22]; 

  214.         if(last_non_zero_p1 <= 24) goto end;

  215.         block[0x1B] = temp_block[0x1B]; block[0x21] = temp_block[0x14]; 

  216.         block[0x1C] = temp_block[0x0D]; block[0x05] = temp_block[0x06]; 

  217.         block[0x0D] = temp_block[0x07]; block[0x15] = temp_block[0x0E]; 

  218.         block[0x2C] = temp_block[0x15]; block[0x13] = temp_block[0x1C]; 

  219.         if(last_non_zero_p1 <= 32) goto end;

  220.         block[0x0B] = temp_block[0x23]; block[0x34] = temp_block[0x2A]; 

  221.         block[0x2A] = temp_block[0x31]; block[0x32] = temp_block[0x38]; 

  222.         block[0x3A] = temp_block[0x39]; block[0x26] = temp_block[0x32]; 

  223.         block[0x39] = temp_block[0x2B]; block[0x03] = temp_block[0x24]; 

  224.         if(last_non_zero_p1 <= 40) goto end;

  225.         block[0x1E] = temp_block[0x1D]; block[0x25] = temp_block[0x16]; 

  226.         block[0x1D] = temp_block[0x0F]; block[0x2D] = temp_block[0x17]; 

  227.         block[0x17] = temp_block[0x1E]; block[0x0E] = temp_block[0x25]; 

  228.         block[0x31] = temp_block[0x2C]; block[0x2B] = temp_block[0x33]; 

  229.         if(last_non_zero_p1 <= 48) goto end;

  230.         block[0x36] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B]; 

  231.         block[0x23] = temp_block[0x34]; block[0x3C] = temp_block[0x2D]; 

  232.         block[0x07] = temp_block[0x26]; block[0x1F] = temp_block[0x1F]; 

  233.         block[0x0F] = temp_block[0x27]; block[0x35] = temp_block[0x2E]; 

  234.         if(last_non_zero_p1 <= 56) goto end;

  235.         block[0x2E] = temp_block[0x35]; block[0x33] = temp_block[0x3C]; 

  236.         block[0x3E] = temp_block[0x3D]; block[0x27] = temp_block[0x36]; 

  237.         block[0x3D] = temp_block[0x2F]; block[0x2F] = temp_block[0x37]; 

  238.         block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];

  239.     }else if(s->idct_permutation[1]==4){

  240.         if(last_non_zero_p1 <= 1) goto end;

  241.         block[0x04] = temp_block[0x01]; 

  242.         block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10]; 

  243.         if(last_non_zero_p1 <= 4) goto end;

  244.         block[0x0C] = temp_block[0x09]; block[0x01] = temp_block[0x02]; 

  245.         block[0x05] = temp_block[0x03]; 

  246.         if(last_non_zero_p1 <= 7) goto end;

  247.         block[0x09] = temp_block[0x0A]; block[0x14] = temp_block[0x11]; 

  248.         block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20]; 

  249.         if(last_non_zero_p1 <= 11) goto end;

  250.         block[0x1C] = temp_block[0x19]; 

  251.         block[0x11] = temp_block[0x12]; block[0x0D] = temp_block[0x0B]; 

  252.         block[0x02] = temp_block[0x04]; block[0x06] = temp_block[0x05]; 

  253.         if(last_non_zero_p1 <= 16) goto end;

  254.         block[0x0A] = temp_block[0x0C]; block[0x15] = temp_block[0x13]; 

  255.         block[0x19] = temp_block[0x1A]; block[0x24] = temp_block[0x21]; 

  256.         block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30]; 

  257.         block[0x2C] = temp_block[0x29]; block[0x21] = temp_block[0x22]; 

  258.         if(last_non_zero_p1 <= 24) goto end;

  259.         block[0x1D] = temp_block[0x1B]; block[0x12] = temp_block[0x14]; 

  260.         block[0x0E] = temp_block[0x0D]; block[0x03] = temp_block[0x06]; 

  261.         block[0x07] = temp_block[0x07]; block[0x0B] = temp_block[0x0E]; 

  262.         block[0x16] = temp_block[0x15]; block[0x1A] = temp_block[0x1C]; 

  263.         if(last_non_zero_p1 <= 32) goto end;

  264.         block[0x25] = temp_block[0x23]; block[0x29] = temp_block[0x2A]; 

  265.         block[0x34] = temp_block[0x31]; block[0x38] = temp_block[0x38]; 

  266.         block[0x3C] = temp_block[0x39]; block[0x31] = temp_block[0x32]; 

  267.         block[0x2D] = temp_block[0x2B]; block[0x22] = temp_block[0x24]; 

  268.         if(last_non_zero_p1 <= 40) goto end;

  269.         block[0x1E] = temp_block[0x1D]; block[0x13] = temp_block[0x16]; 

  270.         block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17]; 

  271.         block[0x1B] = temp_block[0x1E]; block[0x26] = temp_block[0x25]; 

  272.         block[0x2A] = temp_block[0x2C]; block[0x35] = temp_block[0x33]; 

  273.         if(last_non_zero_p1 <= 48) goto end;

  274.         block[0x39] = temp_block[0x3A]; block[0x3D] = temp_block[0x3B]; 

  275.         block[0x32] = temp_block[0x34]; block[0x2E] = temp_block[0x2D]; 

  276.             block[0x23] = temp_block[0x26]; block[0x1F] = temp_block[0x1F]; 

  277.         block[0x27] = temp_block[0x27]; block[0x2B] = temp_block[0x2E]; 

  278.         if(last_non_zero_p1 <= 56) goto end;

  279.         block[0x36] = temp_block[0x35]; block[0x3A] = temp_block[0x3C]; 

  280.         block[0x3E] = temp_block[0x3D]; block[0x33] = temp_block[0x36]; 

  281.         block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37]; 

  282.         block[0x3B] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];

  283.     }else{

  284.         if(last_non_zero_p1 <= 1) goto end;

  285.         block[0x01] = temp_block[0x01]; 

  286.         block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10]; 

  287.         if(last_non_zero_p1 <= 4) goto end;

  288.         block[0x09] = temp_block[0x09]; block[0x02] = temp_block[0x02]; 

  289.         block[0x03] = temp_block[0x03]; 

  290.         if(last_non_zero_p1 <= 7) goto end;

  291.         block[0x0A] = temp_block[0x0A]; block[0x11] = temp_block[0x11]; 

  292.         block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20]; 

  293.         if(last_non_zero_p1 <= 11) goto end;

  294.         block[0x19] = temp_block[0x19]; 

  295.         block[0x12] = temp_block[0x12]; block[0x0B] = temp_block[0x0B]; 

  296.         block[0x04] = temp_block[0x04]; block[0x05] = temp_block[0x05]; 

  297.         if(last_non_zero_p1 <= 16) goto end;

  298.         block[0x0C] = temp_block[0x0C]; block[0x13] = temp_block[0x13]; 

  299.         block[0x1A] = temp_block[0x1A]; block[0x21] = temp_block[0x21]; 

  300.         block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30]; 

  301.         block[0x29] = temp_block[0x29]; block[0x22] = temp_block[0x22]; 

  302.         if(last_non_zero_p1 <= 24) goto end;

  303.         block[0x1B] = temp_block[0x1B]; block[0x14] = temp_block[0x14]; 

  304.         block[0x0D] = temp_block[0x0D]; block[0x06] = temp_block[0x06]; 

  305.         block[0x07] = temp_block[0x07]; block[0x0E] = temp_block[0x0E]; 

  306.         block[0x15] = temp_block[0x15]; block[0x1C] = temp_block[0x1C]; 

  307.         if(last_non_zero_p1 <= 32) goto end;

  308.         block[0x23] = temp_block[0x23]; block[0x2A] = temp_block[0x2A]; 

  309.         block[0x31] = temp_block[0x31]; block[0x38] = temp_block[0x38]; 

  310.         block[0x39] = temp_block[0x39]; block[0x32] = temp_block[0x32]; 

  311.         block[0x2B] = temp_block[0x2B]; block[0x24] = temp_block[0x24]; 

  312.         if(last_non_zero_p1 <= 40) goto end;

  313.         block[0x1D] = temp_block[0x1D]; block[0x16] = temp_block[0x16]; 

  314.         block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17]; 

  315.         block[0x1E] = temp_block[0x1E]; block[0x25] = temp_block[0x25]; 

  316.         block[0x2C] = temp_block[0x2C]; block[0x33] = temp_block[0x33]; 

  317.         if(last_non_zero_p1 <= 48) goto end;

  318.         block[0x3A] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B]; 

  319.         block[0x34] = temp_block[0x34]; block[0x2D] = temp_block[0x2D]; 

  320.         block[0x26] = temp_block[0x26]; block[0x1F] = temp_block[0x1F]; 

  321.         block[0x27] = temp_block[0x27]; block[0x2E] = temp_block[0x2E]; 

  322.         if(last_non_zero_p1 <= 56) goto end;

  323.         block[0x35] = temp_block[0x35]; block[0x3C] = temp_block[0x3C]; 

  324.         block[0x3D] = temp_block[0x3D]; block[0x36] = temp_block[0x36]; 

  325.         block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37]; 

  326.         block[0x3E] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];

  327.     }

  328.     end:

  329. /*

  330.     for(i=0; i<last_non_zero_p1; i++)

  331.     {

  332.        int j= zigzag_direct_noperm[i];

  333.        block[block_permute_op(j)]= temp_block[j];

  334.     }

  335. */

  336. 

  337.     return last_non_zero_p1 - 1;

  338. }