src/video/SDL_yuv_mmx.c

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[^][v][top][bottom][index][help] */

FUNCTIONS

This source file includes following functions.
  1. ASM_VAR
  2. ASM_VAR
  3. ColorRGBDitherYV12MMX1X
  4. Color565DitherYV12MMX1X

   1 /*
   2     SDL - Simple DirectMedia Layer
   3     Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
   4 
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Library General Public
   7     License as published by the Free Software Foundation; either
   8     version 2 of the License, or (at your option) any later version.
   9 
  10     This library is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13     Library General Public License for more details.
  14 
  15     You should have received a copy of the GNU Library General Public
  16     License along with this library; if not, write to the Free
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 
  19     Sam Lantinga
  20     slouken@devolution.com
  21 */
  22 
  23 #ifdef SAVE_RCSID
  24 static char rcsid =
  25  "@(#) $Id: SDL_yuv_mmx.c,v 1.1.2.5 2001/02/10 07:20:05 hercules Exp $";
  26 #endif
  27 
  28 
  29 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
  30 
  31 #include "SDL_types.h"
  32 
  33 #ifdef __ELF__
  34 #define ASM_VAR(X) _##X
     /* [<][>][^][v][top][bottom][index][help] */
  35 #else
  36 #define ASM_VAR(X) X
     /* [<][>][^][v][top][bottom][index][help] */
  37 #endif
  38 
  39 static unsigned int  ASM_VAR(MMX_0080w)[]    = {0x00800080, 0x00800080};
  40 static unsigned int  ASM_VAR(MMX_00FFw)[]    = {0x00ff00ff, 0x00ff00ff}; 
  41 static unsigned int  ASM_VAR(MMX_FF00w)[]    = {0xff00ff00, 0xff00ff00}; 
  42 
  43 static unsigned short ASM_VAR(MMX_Ycoeff)[]  = {0x004a, 0x004a, 0x004a, 0x004a}; 
  44 
  45 static unsigned short ASM_VAR(MMX_UbluRGB)[] = {0x0072, 0x0072, 0x0072, 0x0072};    
  46 static unsigned short ASM_VAR(MMX_VredRGB)[] = {0x0059, 0x0059, 0x0059, 0x0059};  
  47 static unsigned short ASM_VAR(MMX_UgrnRGB)[] = {0xffea, 0xffea, 0xffea, 0xffea}; 
  48 static unsigned short ASM_VAR(MMX_VgrnRGB)[] = {0xffd2, 0xffd2, 0xffd2, 0xffd2};  
  49 
  50 static unsigned short ASM_VAR(MMX_Ublu5x5)[] = {0x0081, 0x0081, 0x0081, 0x0081};
  51 static unsigned short ASM_VAR(MMX_Vred5x5)[] = {0x0066, 0x0066, 0x0066, 0x0066};
  52 static unsigned short ASM_VAR(MMX_Ugrn555)[] = {0xffe7, 0xffe7, 0xffe7, 0xffe7};
  53 static unsigned short ASM_VAR(MMX_Vgrn555)[] = {0xffcc, 0xffcc, 0xffcc, 0xffcc};
  54 static unsigned short ASM_VAR(MMX_Ugrn565)[] = {0xffe8, 0xffe8, 0xffe8, 0xffe8};
  55 static unsigned short ASM_VAR(MMX_Vgrn565)[] = {0xffcd, 0xffcd, 0xffcd, 0xffcd};
  56 
  57 static unsigned short ASM_VAR(MMX_red555)[]  = {0x7c00, 0x7c00, 0x7c00, 0x7c00};
  58 static unsigned short ASM_VAR(MMX_red565)[]  = {0xf800, 0xf800, 0xf800, 0xf800};
  59 static unsigned short ASM_VAR(MMX_grn555)[]  = {0x03e0, 0x03e0, 0x03e0, 0x03e0};
  60 static unsigned short ASM_VAR(MMX_grn565)[]  = {0x07e0, 0x07e0, 0x07e0, 0x07e0};
  61 static unsigned short ASM_VAR(MMX_blu5x5)[]  = {0x001f, 0x001f, 0x001f, 0x001f};
  62 
  63 /**
  64    This MMX assembler is my first assembler/MMX program ever.
  65    Thus it maybe buggy.
  66    Send patches to:
  67    mvogt@rhrk.uni-kl.de
  68 
  69    After it worked fine I have "obfuscated" the code a bit to have
  70    more parallism in the MMX units. This means I moved
  71    initilisation around and delayed other instruction.
  72    Performance measurement did not show that this brought any advantage
  73    but in theory it _should_ be faster this way.
  74 
  75    The overall performanve gain to the C based dither was 30%-40%.
  76    The MMX routine calculates 256bit=8RGB values in each cycle
  77    (4 for row1 & 4 for row2)
  78 
  79    The red/green/blue.. coefficents are taken from the mpeg_play 
  80    player. They look nice, but I dont know if you can have
  81    better values, to avoid integer rounding errors.
  82    
  83 
  84    IMPORTANT:
  85    ==========
  86 
  87    It is a requirement that the cr/cb/lum are 8 byte aligned and
  88    the out are 16byte aligned or you will/may get segfaults
  89 
  90 */
  91 
  92 void ColorRGBDitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
     /* [<][>][^][v][top][bottom][index][help] */
  93                               unsigned char *lum, unsigned char *cr,
  94                               unsigned char *cb, unsigned char *out,
  95                               int rows, int cols, int mod )
  96 {
  97     Uint32 *row1;
  98     Uint32 *row2;
  99 
 100     unsigned char* y = lum +cols*rows;    // Pointer to the end
 101     int x=0;
 102     row1 = (Uint32 *)out;                 // 32 bit target
 103     row2 = (Uint32 *)out+cols+mod;        // start of second row 
 104     mod = (mod+cols+mod)*4;               // increment for row1 in byte
 105 
 106     __asm__ __volatile__ (
 107 /* We don't really care about PIC - the code should be rewritten to use
 108    relative addressing for the static tables, so right now we take the
 109    COW hit on the pages this code resides. Big deal.
 110    This spill is just to reduce register pressure in the PIC case. */
 111                  "pushl %%ebx\n"
 112                  "movl %0, %%ebx\n"
 113 
 114                  ".align 8\n"
 115                  "1:\n"
 116                 
 117                  // create Cr (result in mm1)
 118                  "movd (%%ebx), %%mm1\n"   //         0  0  0  0  v3 v2 v1 v0
 119                  "pxor %%mm7,%%mm7\n"      //         00 00 00 00 00 00 00 00
 120                  "movd (%2), %%mm2\n"           //    0  0  0  0 l3 l2 l1 l0
 121                  "punpcklbw %%mm7,%%mm1\n" //         0  v3 0  v2 00 v1 00 v0
 122                  "punpckldq %%mm1,%%mm1\n" //         00 v1 00 v0 00 v1 00 v0
 123                  "psubw _MMX_0080w,%%mm1\n"  // mm1-128:r1 r1 r0 r0 r1 r1 r0 r0 
 124 
 125                  // create Cr_g (result in mm0)
 126                  "movq %%mm1,%%mm0\n"           // r1 r1 r0 r0 r1 r1 r0 r0
 127                  "pmullw _MMX_VgrnRGB,%%mm0\n"// red*-46dec=0.7136*64
 128                  "pmullw _MMX_VredRGB,%%mm1\n"// red*89dec=1.4013*64
 129                  "psraw  $6, %%mm0\n"           // red=red/64
 130                  "psraw  $6, %%mm1\n"           // red=red/64
 131                  
 132                  // create L1 L2 (result in mm2,mm4)
 133                  // L2=lum+cols
 134                  "movq (%2,%4),%%mm3\n"         //    0  0  0  0 L3 L2 L1 L0
 135                  "punpckldq %%mm3,%%mm2\n"      //   L3 L2 L1 L0 l3 l2 l1 l0
 136                  "movq %%mm2,%%mm4\n"           //   L3 L2 L1 L0 l3 l2 l1 l0
 137                  "pand _MMX_FF00w,%%mm2\n"      //   L3 0  L1  0 l3  0 l1  0
 138                  "pand _MMX_00FFw,%%mm4\n"      //   0  L2  0 L0  0 l2  0 l0
 139                  "psrlw $8,%%mm2\n"             //   0  L3  0 L1  0 l3  0 l1
 140 
 141                  // create R (result in mm6)
 142                  "movq %%mm2,%%mm5\n"           //   0 L3  0 L1  0 l3  0 l1
 143                  "movq %%mm4,%%mm6\n"           //   0 L2  0 L0  0 l2  0 l0
 144                  "paddsw  %%mm1, %%mm5\n"       // lum1+red:x R3 x R1 x r3 x r1
 145                  "paddsw  %%mm1, %%mm6\n"       // lum1+red:x R2 x R0 x r2 x r0
 146                  "packuswb %%mm5,%%mm5\n"       //  R3 R1 r3 r1 R3 R1 r3 r1
 147                  "packuswb %%mm6,%%mm6\n"       //  R2 R0 r2 r0 R2 R0 r2 r0
 148                  "pxor %%mm7,%%mm7\n"      //         00 00 00 00 00 00 00 00
 149                  "punpcklbw %%mm5,%%mm6\n"      //  R3 R2 R1 R0 r3 r2 r1 r0
 150 
 151                  // create Cb (result in mm1)
 152                  "movd (%1), %%mm1\n"      //         0  0  0  0  u3 u2 u1 u0
 153                  "punpcklbw %%mm7,%%mm1\n" //         0  u3 0  u2 00 u1 00 u0
 154                  "punpckldq %%mm1,%%mm1\n" //         00 u1 00 u0 00 u1 00 u0
 155                  "psubw _MMX_0080w,%%mm1\n"  // mm1-128:u1 u1 u0 u0 u1 u1 u0 u0 
 156                  // create Cb_g (result in mm5)
 157                  "movq %%mm1,%%mm5\n"            // u1 u1 u0 u0 u1 u1 u0 u0
 158                  "pmullw _MMX_UgrnRGB,%%mm5\n"    // blue*-109dec=1.7129*64
 159                  "pmullw _MMX_UbluRGB,%%mm1\n"    // blue*114dec=1.78125*64
 160                  "psraw  $6, %%mm5\n"            // blue=red/64
 161                  "psraw  $6, %%mm1\n"            // blue=blue/64
 162 
 163                  // create G (result in mm7)
 164                  "movq %%mm2,%%mm3\n"      //   0  L3  0 L1  0 l3  0 l1
 165                  "movq %%mm4,%%mm7\n"      //   0  L2  0 L0  0 l2  0 l1
 166                  "paddsw  %%mm5, %%mm3\n"  // lum1+Cb_g:x G3t x G1t x g3t x g1t
 167                  "paddsw  %%mm5, %%mm7\n"  // lum1+Cb_g:x G2t x G0t x g2t x g0t
 168                  "paddsw  %%mm0, %%mm3\n"  // lum1+Cr_g:x G3  x G1  x g3  x g1
 169                  "paddsw  %%mm0, %%mm7\n"  // lum1+blue:x G2  x G0  x g2  x g0
 170                  "packuswb %%mm3,%%mm3\n"  // G3 G1 g3 g1 G3 G1 g3 g1
 171                  "packuswb %%mm7,%%mm7\n"  // G2 G0 g2 g0 G2 G0 g2 g0
 172                  "punpcklbw %%mm3,%%mm7\n" // G3 G2 G1 G0 g3 g2 g1 g0
 173                  
 174                  // create B (result in mm5)
 175                  "movq %%mm2,%%mm3\n"         //   0  L3  0 L1  0 l3  0 l1
 176                  "movq %%mm4,%%mm5\n"         //   0  L2  0 L0  0 l2  0 l1
 177                  "paddsw  %%mm1, %%mm3\n"     // lum1+blue:x B3 x B1 x b3 x b1
 178                  "paddsw  %%mm1, %%mm5\n"     // lum1+blue:x B2 x B0 x b2 x b0
 179                  "packuswb %%mm3,%%mm3\n"     // B3 B1 b3 b1 B3 B1 b3 b1
 180                  "packuswb %%mm5,%%mm5\n"     // B2 B0 b2 b0 B2 B0 b2 b0
 181                  "punpcklbw %%mm3,%%mm5\n"    // B3 B2 B1 B0 b3 b2 b1 b0
 182 
 183                  // fill destination row1 (needed are mm6=Rr,mm7=Gg,mm5=Bb)
 184 
 185                  "pxor %%mm2,%%mm2\n"           //  0  0  0  0  0  0  0  0
 186                  "pxor %%mm4,%%mm4\n"           //  0  0  0  0  0  0  0  0
 187                  "movq %%mm6,%%mm1\n"           // R3 R2 R1 R0 r3 r2 r1 r0
 188                  "movq %%mm5,%%mm3\n"           // B3 B2 B1 B0 b3 b2 b1 b0
 189                  // process lower lum
 190                  "punpcklbw %%mm4,%%mm1\n"      //  0 r3  0 r2  0 r1  0 r0
 191                  "punpcklbw %%mm4,%%mm3\n"      //  0 b3  0 b2  0 b1  0 b0
 192                  "movq %%mm1,%%mm2\n"           //  0 r3  0 r2  0 r1  0 r0
 193                  "movq %%mm3,%%mm0\n"           //  0 b3  0 b2  0 b1  0 b0
 194                  "punpcklwd %%mm1,%%mm3\n"      //  0 r1  0 b1  0 r0  0 b0
 195                  "punpckhwd %%mm2,%%mm0\n"      //  0 r3  0 b3  0 r2  0 b2
 196 
 197                  "pxor %%mm2,%%mm2\n"           //  0  0  0  0  0  0  0  0
 198                  "movq %%mm7,%%mm1\n"           // G3 G2 G1 G0 g3 g2 g1 g0
 199                  "punpcklbw %%mm1,%%mm2\n"      // g3  0 g2  0 g1  0 g0  0
 200                  "punpcklwd %%mm4,%%mm2\n"      //  0  0 g1  0  0  0 g0  0 
 201                  "por  %%mm3, %%mm2\n"          //  0 r1 g1 b1  0 r0 g0 b0
 202                  "movq   %%mm2,(%3)\n"          // wrote out ! row1
 203 
 204                  "pxor %%mm2,%%mm2\n"           //  0  0  0  0  0  0  0  0
 205                  "punpcklbw %%mm1,%%mm4\n"      // g3  0 g2  0 g1  0 g0  0
 206                  "punpckhwd %%mm2,%%mm4\n"      //  0  0 g3  0  0  0 g2  0 
 207                  "por  %%mm0, %%mm4\n"          //  0 r3 g3 b3  0 r2 g2 b2
 208                  "movq   %%mm4,8(%3)\n"         // wrote out ! row1
 209                  
 210                  // fill destination row2 (needed are mm6=Rr,mm7=Gg,mm5=Bb)
 211                  // this can be done "destructive"
 212                  "pxor %%mm2,%%mm2\n"           //  0  0  0  0  0  0  0  0
 213                  "punpckhbw %%mm2,%%mm6\n"      //  0 R3  0 R2  0 R1  0 R0
 214                  "punpckhbw %%mm1,%%mm5\n"      // G3 B3 G2 B2 G1 B1 G0 B0
 215                  "movq %%mm5,%%mm1\n"           // G3 B3 G2 B2 G1 B1 G0 B0
 216                  "punpcklwd %%mm6,%%mm1\n"      //  0 R1 G1 B1  0 R0 G0 B0
 217                  "movq   %%mm1,(%5)\n"          // wrote out ! row2
 218                  "punpckhwd %%mm6,%%mm5\n"      //  0 R3 G3 B3  0 R2 G2 B2
 219                  "movq   %%mm5,8(%5)\n"         // wrote out ! row2
 220                  
 221                  "addl  $4,%2\n"            // lum+4
 222                  "leal  16(%3),%3\n"        // row1+16
 223                  "leal  16(%5),%5\n"        // row2+16
 224                  "addl  $2, %%ebx\n"        // cr+2
 225                  "addl  $2, %1\n"           // cb+2
 226 
 227                  "addl  $4,%6\n"            // x+4
 228                  "cmpl  %4,%6\n"
 229 
 230                  "jl    1b\n"
 231                  "addl           %4,     %2\n" // lum += cols 
 232                  "addl           %8,     %3\n" // row1+= mod
 233                  "addl           %8,     %5\n" // row2+= mod
 234                  "movl           $0,     %6\n" // x=0
 235                  "cmpl           %7,     %2\n"
 236                  "jl             1b\n"
 237                  "emms\n"
 238                  "popl %%ebx\n"
 239                  :
 240                  : "m" (cr), "r"(cb),"r"(lum),
 241                  "r"(row1),"r"(cols),"r"(row2),"m"(x),"m"(y),"m"(mod)
 242                  : "%ebx"
 243                  );
 244 }
 245 
 246 void Color565DitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
     /* [<][>][^][v][top][bottom][index][help] */
 247                              unsigned char *lum, unsigned char *cr,
 248                              unsigned char *cb, unsigned char *out,
 249                              int rows, int cols, int mod )
 250 {
 251     Uint16 *row1;
 252     Uint16 *row2;
 253 
 254     unsigned char* y = lum +cols*rows;    /* Pointer to the end */
 255     int x=0;
 256     row1 = (Uint16 *)out;                 /* 16 bit target */
 257     row2 = (Uint16 *)out+cols+mod;        /* start of second row  */
 258     mod = (mod+cols+mod)*2;               /* increment for row1 in byte */
 259 
 260 
 261       __asm__ __volatile__(
 262          "pushl %%ebx\n"
 263          "movl %0, %%ebx\n"
 264 
 265          ".align 8\n"
 266          "1:\n"
 267          "movd           (%1),                   %%mm0\n" // 4 Cb         0  0  0  0 u3 u2 u1 u0
 268          "pxor           %%mm7,                  %%mm7\n"
 269          "movd           (%%ebx),                %%mm1\n" // 4 Cr                0  0  0  0 v3 v2 v1 v0
 270          "punpcklbw      %%mm7,                  %%mm0\n" // 4 W cb   0 u3  0 u2  0 u1  0 u0
 271          "punpcklbw      %%mm7,                  %%mm1\n" // 4 W cr   0 v3  0 v2  0 v1  0 v0
 272          "psubw          _MMX_0080w,             %%mm0\n"
 273          "psubw          _MMX_0080w,             %%mm1\n"
 274          "movq           %%mm0,                  %%mm2\n" // Cb                   0 u3  0 u2  0 u1  0 u0
 275          "movq           %%mm1,                  %%mm3\n" // Cr
 276          "pmullw         _MMX_Ugrn565,           %%mm2\n" // Cb2green 0 R3  0 R2  0 R1  0 R0
 277          "movq           (%2),                   %%mm6\n" // L1      l7 L6 L5 L4 L3 L2 L1 L0
 278          "pmullw         _MMX_Ublu5x5,           %%mm0\n" // Cb2blue
 279          "pand           _MMX_00FFw,             %%mm6\n" // L1      00 L6 00 L4 00 L2 00 L0
 280          "pmullw         _MMX_Vgrn565,           %%mm3\n" // Cr2green
 281          "movq           (%2),                   %%mm7\n" // L2
 282          "pmullw         _MMX_Vred5x5,           %%mm1\n" // Cr2red
 283          "psrlw          $8,                     %%mm7\n"        // L2           00 L7 00 L5 00 L3 00 L1
 284          "pmullw         _MMX_Ycoeff,            %%mm6\n" // lum1
 285          "paddw          %%mm3,                  %%mm2\n" // Cb2green + Cr2green == green
 286          "pmullw         _MMX_Ycoeff,            %%mm7\n" // lum2
 287 
 288          "movq           %%mm6,                  %%mm4\n" // lum1
 289          "paddw          %%mm0,                  %%mm6\n" // lum1 +blue 00 B6 00 B4 00 B2 00 B0
 290          "movq           %%mm4,                  %%mm5\n" // lum1
 291          "paddw          %%mm1,                  %%mm4\n" // lum1 +red  00 R6 00 R4 00 R2 00 R0
 292          "paddw          %%mm2,                  %%mm5\n" // lum1 +green 00 G6 00 G4 00 G2 00 G0
 293          "psraw          $6,                     %%mm4\n" // R1 0 .. 64
 294          "movq           %%mm7,                  %%mm3\n" // lum2                       00 L7 00 L5 00 L3 00 L1
 295          "psraw          $6,                     %%mm5\n" // G1  - .. +
 296          "paddw          %%mm0,                  %%mm7\n" // Lum2 +blue 00 B7 00 B5 00 B3 00 B1
 297          "psraw          $6,                     %%mm6\n" // B1         0 .. 64
 298          "packuswb       %%mm4,                  %%mm4\n" // R1 R1
 299          "packuswb       %%mm5,                  %%mm5\n" // G1 G1
 300          "packuswb       %%mm6,                  %%mm6\n" // B1 B1
 301          "punpcklbw      %%mm4,                  %%mm4\n"
 302          "punpcklbw      %%mm5,                  %%mm5\n"
 303 
 304          "pand           _MMX_red565,            %%mm4\n"
 305          "psllw          $3,                     %%mm5\n" // GREEN       1
 306          "punpcklbw      %%mm6,                  %%mm6\n"
 307          "pand           _MMX_grn565,            %%mm5\n"
 308          "pand           _MMX_red565,            %%mm6\n"
 309          "por            %%mm5,                  %%mm4\n" //
 310          "psrlw          $11,                    %%mm6\n" // BLUE        1
 311          "movq           %%mm3,                  %%mm5\n" // lum2
 312          "paddw          %%mm1,                  %%mm3\n" // lum2 +red      00 R7 00 R5 00 R3 00 R1
 313          "paddw          %%mm2,                  %%mm5\n" // lum2 +green 00 G7 00 G5 00 G3 00 G1
 314          "psraw          $6,                     %%mm3\n" // R2
 315          "por            %%mm6,                  %%mm4\n" // MM4
 316          "psraw          $6,                     %%mm5\n" // G2
 317          "movq           (%2, %4),               %%mm6\n" // L3 load lum2
 318          "psraw          $6,                     %%mm7\n"
 319          "packuswb       %%mm3,                  %%mm3\n"
 320          "packuswb       %%mm5,                  %%mm5\n"
 321          "packuswb       %%mm7,                  %%mm7\n"
 322          "pand           _MMX_00FFw,             %%mm6\n" // L3
 323          "punpcklbw      %%mm3,                  %%mm3\n"
 324          "punpcklbw      %%mm5,                  %%mm5\n"
 325          "pmullw         _MMX_Ycoeff,            %%mm6\n" // lum3
 326          "punpcklbw      %%mm7,                  %%mm7\n"
 327          "psllw          $3,                     %%mm5\n" // GREEN 2
 328          "pand           _MMX_red565,            %%mm7\n"
 329          "pand           _MMX_red565,            %%mm3\n"
 330          "psrlw          $11,                    %%mm7\n" // BLUE  2
 331          "pand           _MMX_grn565,            %%mm5\n"
 332          "por            %%mm7,                  %%mm3\n"
 333          "movq           (%2,%4),                %%mm7\n" // L4 load lum2
 334          "por            %%mm5,                  %%mm3\n" //
 335          "psrlw          $8,                     %%mm7\n" // L4
 336          "movq           %%mm4,                  %%mm5\n"
 337          "punpcklwd      %%mm3,                  %%mm4\n"
 338          "pmullw         _MMX_Ycoeff,            %%mm7\n" // lum4
 339          "punpckhwd      %%mm3,                  %%mm5\n"
 340 
 341          "movq           %%mm4,                  (%3)\n"  // write row1
 342          "movq           %%mm5,                  8(%3)\n" // write row1
 343 
 344          "movq           %%mm6,                  %%mm4\n" // Lum3
 345          "paddw          %%mm0,                  %%mm6\n" // Lum3 +blue
 346 
 347          "movq           %%mm4,                  %%mm5\n" // Lum3
 348          "paddw          %%mm1,                  %%mm4\n" // Lum3 +red
 349          "paddw          %%mm2,                  %%mm5\n" // Lum3 +green
 350          "psraw          $6,                     %%mm4\n"
 351          "movq           %%mm7,                  %%mm3\n" // Lum4
 352          "psraw          $6,                     %%mm5\n"
 353          "paddw          %%mm0,                  %%mm7\n" // Lum4 +blue
 354          "psraw          $6,                     %%mm6\n" // Lum3 +blue
 355          "movq           %%mm3,                  %%mm0\n" // Lum4
 356          "packuswb       %%mm4,                  %%mm4\n"
 357          "paddw          %%mm1,                  %%mm3\n" // Lum4 +red
 358          "packuswb       %%mm5,                  %%mm5\n"
 359          "paddw          %%mm2,                  %%mm0\n" // Lum4 +green
 360          "packuswb       %%mm6,                  %%mm6\n"
 361          "punpcklbw      %%mm4,                  %%mm4\n"
 362          "punpcklbw      %%mm5,                  %%mm5\n"
 363          "punpcklbw      %%mm6,                  %%mm6\n"
 364          "psllw          $3,                     %%mm5\n" // GREEN 3
 365          "pand           _MMX_red565,            %%mm4\n"
 366          "psraw          $6,                     %%mm3\n" // psr 6
 367          "psraw          $6,                     %%mm0\n"
 368          "pand           _MMX_red565,            %%mm6\n" // BLUE
 369          "pand           _MMX_grn565,            %%mm5\n"
 370          "psrlw          $11,                    %%mm6\n" // BLUE  3
 371          "por            %%mm5,                  %%mm4\n"
 372          "psraw          $6,                     %%mm7\n"
 373          "por            %%mm6,                  %%mm4\n"
 374          "packuswb       %%mm3,                  %%mm3\n"
 375          "packuswb       %%mm0,                  %%mm0\n"
 376          "packuswb       %%mm7,                  %%mm7\n"
 377          "punpcklbw      %%mm3,                  %%mm3\n"
 378          "punpcklbw      %%mm0,                  %%mm0\n"
 379          "punpcklbw      %%mm7,                  %%mm7\n"
 380          "pand           _MMX_red565,            %%mm3\n"
 381          "pand           _MMX_red565,            %%mm7\n" // BLUE
 382          "psllw          $3,                     %%mm0\n" // GREEN 4
 383          "psrlw          $11,                    %%mm7\n"
 384          "pand           _MMX_grn565,            %%mm0\n"
 385          "por            %%mm7,                  %%mm3\n"
 386          "por            %%mm0,                  %%mm3\n"
 387 
 388          "movq           %%mm4,                  %%mm5\n"
 389 
 390          "punpcklwd      %%mm3,                  %%mm4\n"
 391          "punpckhwd      %%mm3,                  %%mm5\n"
 392 
 393          "movq           %%mm4,                  (%5)\n"
 394          "movq           %%mm5,                  8(%5)\n"
 395 
 396          "addl           $8,                     %6\n"
 397          "addl           $8,                     %2\n"
 398          "addl           $4,                     %%ebx\n"
 399          "addl           $4,                     %1\n"
 400          "cmpl           %4,                     %6\n"
 401          "leal           16(%3),                 %3\n"
 402          "leal           16(%5),%5\n" // row2+16
 403 
 404 
 405          "jl             1b\n"
 406          "addl           %4,     %2\n" // lum += cols 
 407          "addl           %8,     %3\n" // row1+= mod
 408          "addl           %8,     %5\n" // row2+= mod
 409          "movl           $0,     %6\n" // x=0
 410          "cmpl           %7,     %2\n"
 411          "jl             1b\n"
 412          "emms\n"
 413          "popl %%ebx\n"
 414          :
 415          :"m" (cr), "r"(cb),"r"(lum),
 416          "r"(row1),"r"(cols),"r"(row2),"m"(x),"m"(y),"m"(mod)
 417          : "%ebx"
 418          );
 419 }
 420 
 421 #endif /* GCC i386 inline assembly */

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