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revision 1614, Tue May 17 15:40:11 2005 UTC revision 1620, Tue Jun 14 13:58:21 2005 UTC
# Line 19  Line 19 
19   *  along with this program; if not, write to the Free Software   *  along with this program; if not, write to the Free Software
20   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
21   *   *
22   * $Id: xvid_bench.c,v 1.17 2005-05-17 15:40:11 Skal Exp $   * $Id: xvid_bench.c,v 1.21 2005-06-14 13:58:21 Skal Exp $
23   *   *
24   ****************************************************************************/   ****************************************************************************/
25    
# Line 527  Line 527 
527  }                                         \  }                                         \
528  emms();                                   \  emms();                                   \
529  t = (gettime_usec()-t -overhead) / nb_tests;\  t = (gettime_usec()-t -overhead) / nb_tests;\
530  s = calc_crc((uint8_t*)(DST), sizeof((DST)), CRC32_INITIAL)  s = calc_crc((uint8_t*)(DST), 8*32*sizeof((DST)[0]), CRC32_INITIAL)
531    
532  #define TEST_TRANSFER(FUNC, DST, SRC)         \  #define TEST_TRANSFER(FUNC, DST, SRC)         \
533  TEST_TRANSFER_BEGIN(DST);                 \  TEST_TRANSFER_BEGIN(DST);                 \
# Line 553  Line 553 
553  }                                         \  }                                         \
554  emms();                                   \  emms();                                   \
555  t = (gettime_usec()-t -overhead) / nb_tests;\  t = (gettime_usec()-t -overhead) / nb_tests;\
556  s = calc_crc((uint8_t*)(DST), sizeof((DST)), CRC32_INITIAL)  s = calc_crc((uint8_t*)(DST), 8*32*sizeof((DST)[0]), CRC32_INITIAL)
557    
558  #define TEST_TRANSFER2(FUNC, DST, SRC, R1)    \  #define TEST_TRANSFER2(FUNC, DST, SRC, R1)    \
559  TEST_TRANSFER2_BEGIN(DST,SRC);            \  TEST_TRANSFER2_BEGIN(DST,SRC);            \
# Line 570  Line 570 
570          const int nb_tests = 4000*speed_ref;          const int nb_tests = 4000*speed_ref;
571          int i;          int i;
572          CPU *cpu;          CPU *cpu;
573          uint8_t  Src8[8*32], Dst8[8*32], Ref1[8*32], Ref2[8*32];  //      uint8_t  Src8[8*32], Dst8[8*32], Ref1[8*32], Ref2[8*32];
574          int16_t Src16[8*32], Dst16[8*32];  //      int16_t Src16[8*32], Dst16[8*32];
575      DECLARE_ALIGNED_MATRIX(Src8, 8, 32, uint8_t, CACHE_LINE);
576      DECLARE_ALIGNED_MATRIX(Dst8, 8, 32, uint8_t, CACHE_LINE);
577      DECLARE_ALIGNED_MATRIX(Ref1, 8, 32, uint8_t, CACHE_LINE);
578      DECLARE_ALIGNED_MATRIX(Ref2, 8, 32, uint8_t, CACHE_LINE);
579      DECLARE_ALIGNED_MATRIX(Src16, 8, 32, uint16_t, CACHE_LINE);
580      DECLARE_ALIGNED_MATRIX(Dst16, 8, 32, uint16_t, CACHE_LINE);
581    
582          printf( "\n ===  test transfer ===\n" );          printf( "\n ===  test transfer ===\n" );
583    
# Line 606  Line 612 
612                  TEST_TRANSFER2(transfer_8to16sub, Dst16, Src8, Ref1);                  TEST_TRANSFER2(transfer_8to16sub, Dst16, Src8, Ref1);
613                  {                  {
614                          int s1, s2;                          int s1, s2;
615                          s1 = calc_crc((uint8_t*)Dst16, sizeof(Dst16), CRC32_INITIAL);                          s1 = calc_crc((uint8_t*)Dst16, 8*32*sizeof(Dst16[0]), CRC32_INITIAL);
616                          s2 = calc_crc((uint8_t*)Src8, sizeof(Src8), CRC32_INITIAL);                          s2 = calc_crc((uint8_t*)Src8, 8*32*sizeof(Src8[0]), CRC32_INITIAL);
617                          printf("%s - 8to16sub  %.3f usec       crc32(1)=0x%08x crc32(2)=0x%08x %s %s\n",                          printf("%s - 8to16sub  %.3f usec       crc32(1)=0x%08x crc32(2)=0x%08x %s %s\n",
618                                     cpu->name, t, s1, s2,                                     cpu->name, t, s1, s2,
619                                     (s1!=0xa1e07163)?"| ERROR1": "",                                     (s1!=0xa1e07163)?"| ERROR1": "",
# Line 1588  Line 1594 
1594          }          }
1595  #endif  #endif
1596  }  }
1597    /*********************************************************************/
1598    
1599    static uint32_t __inline log2bin_v1(uint32_t value)
1600    {
1601      int n = 0;
1602      while (value) {
1603        value >>= 1;
1604        n++;
1605      }
1606      return n;
1607    }
1608    
1609    static const uint8_t log2_tab_16[16] =  { 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4 };
1610    
1611    static uint32_t __inline log2bin_v2(uint32_t value)
1612    {
1613      int n = 0;
1614      if (value & 0xffff0000) {
1615        value >>= 16;
1616        n += 16;
1617      }
1618      if (value & 0xff00) {
1619        value >>= 8;
1620        n += 8;
1621      }
1622      if (value & 0xf0) {
1623        value >>= 4;
1624        n += 4;
1625      }
1626     return n + log2_tab_16[value];
1627    }
1628    
1629    void test_log2bin()
1630    {
1631            const int nb_tests = 3000*speed_ref;
1632      int n, crc1=0, crc2=0;
1633      uint32_t s, s0;
1634      double t1, t2;
1635    
1636      t1 = gettime_usec();
1637      s0 = (int)(t1*31.241);
1638      for(s=s0, n=0; n<nb_tests; ++n, s=(s*12363+31)&0x7fffffff)
1639        crc1 += log2bin_v1(s);
1640      t1 = (gettime_usec()-t1) / nb_tests;
1641    
1642      t2 = gettime_usec();
1643      for(s=s0, n=0; n<nb_tests; ++n, s=(s*12363+31)&0x7fffffff)
1644        crc2 += log2bin_v2(s);
1645      t2 = (gettime_usec() - t2) / nb_tests;
1646    
1647      printf( "log2bin_v1: %.3f sec  crc=%d\n", t1, crc1 );
1648      printf( "log2bin_v2: %.3f sec  crc=%d\n", t2, crc2 );
1649      if (crc1!=crc2) printf( " CRC ERROR !\n" );
1650    }
1651    
1652    /*********************************************************************/
1653    
1654    static void __inline old_gcd(int *num, int *den)
1655    {
1656     int i = *num;
1657      while (i > 1) {
1658        if (*num % i == 0 && *den % i == 0) {
1659          *num /= i;
1660          *den /= i;
1661          i = *num;
1662          continue;
1663        }
1664        i--;
1665      }
1666    }
1667    
1668    static uint32_t gcd(int num, int den)
1669    {
1670      int tmp;
1671      while( (tmp=num%den) ) { num = den; den = tmp; }
1672      return den;
1673    }
1674    static void __inline new_gcd(int *num, int *den)
1675    {
1676      const int div = gcd(*num, *den);
1677      if (num) {
1678        *num /= div;
1679        *den /= div;
1680      }
1681    }
1682    
1683    void test_gcd()
1684    {
1685            const int nb_tests = 10*speed_ref;
1686      int i;
1687      uint32_t crc1=0, crc2=0;
1688      uint32_t n0, n, d0, d;
1689      double t1, t2;
1690    
1691      t1 = gettime_usec();
1692      n0 = 0xfffff & (int)(t1*31.241);
1693      d0 = 0xfffff & (int)( ((n0*4123)%17) | 1 );
1694      for(n=n0, d=d0, i=0; i<nb_tests; ++i) {
1695        old_gcd(&n, &d);
1696        crc1 = (((crc1>>4)^d) + ((crc1<<2)^n) ) & 0xffffff;
1697        n = d;
1698        d = (d*12363+31) & 0xffff;
1699        d |= !d;
1700      }
1701      t1 = (gettime_usec()-t1) / nb_tests;
1702    
1703      t2 = gettime_usec();
1704      for(n=n0, d=d0, i=0; i<nb_tests; ++i) {
1705        new_gcd(&n, &d);
1706        crc2 = (((crc2>>4)^d) + ((crc2<<2)^n) ) & 0xffffff;
1707        n = d;
1708        d = (d*12363+31) & 0xffff;
1709        d |= !d;
1710      }
1711      t2 = (gettime_usec() - t2) / nb_tests;
1712    
1713      printf( "old_gcd: %.3f sec  crc=%d\n", t1, crc1 );
1714      printf( "new_gcd: %.3f sec  crc=%d\n", t2, crc2 );
1715      if (crc1!=crc2) printf( " CRC ERROR !\n" );
1716    }
1717    
1718  /*********************************************************************  /*********************************************************************
1719   * main   * main
# Line 1613  Line 1739 
1739            else if (!strcmp(argv[c], "-c"))      cpu_mask = 0 /* PLAIN_C */ | XVID_CPU_FORCE;            else if (!strcmp(argv[c], "-c"))      cpu_mask = 0 /* PLAIN_C */ | XVID_CPU_FORCE;
1740            else if (!strcmp(argv[c], "-mmx"))    cpu_mask = XVID_CPU_MMX    | XVID_CPU_FORCE;            else if (!strcmp(argv[c], "-mmx"))    cpu_mask = XVID_CPU_MMX    | XVID_CPU_FORCE;
1741            else if (!strcmp(argv[c], "-mmxext")) cpu_mask = XVID_CPU_MMXEXT | XVID_CPU_MMX | XVID_CPU_FORCE;            else if (!strcmp(argv[c], "-mmxext")) cpu_mask = XVID_CPU_MMXEXT | XVID_CPU_MMX | XVID_CPU_FORCE;
1742            else if (!strcmp(argv[c], "-sse2"))   cpu_mask = XVID_CPU_SSE2   | XVID_CPU_MMX | XVID_CPU_FORCE;            else if (!strcmp(argv[c], "-sse2"))   cpu_mask = XVID_CPU_SSE2   | XVID_CPU_MMXEXT | XVID_CPU_MMX | XVID_CPU_FORCE;
1743            else if (!strcmp(argv[c], "-3dnow"))  cpu_mask = XVID_CPU_3DNOW  | XVID_CPU_FORCE;            else if (!strcmp(argv[c], "-3dnow"))  cpu_mask = XVID_CPU_3DNOW  | XVID_CPU_FORCE;
1744            else if (!strcmp(argv[c], "-3dnowe")) cpu_mask = XVID_CPU_3DNOW  | XVID_CPU_3DNOWEXT | XVID_CPU_FORCE;            else if (!strcmp(argv[c], "-3dnowe")) cpu_mask = XVID_CPU_3DNOW  | XVID_CPU_3DNOWEXT | XVID_CPU_FORCE;
1745            else if (!strcmp(argv[c], "-altivec")) cpu_mask = XVID_CPU_ALTIVEC | XVID_CPU_FORCE;            else if (!strcmp(argv[c], "-altivec")) cpu_mask = XVID_CPU_ALTIVEC | XVID_CPU_FORCE;
# Line 1655  Line 1781 
1781          if (what==0 || what==5) test_quant();          if (what==0 || what==5) test_quant();
1782          if (what==0 || what==6) test_cbp();          if (what==0 || what==6) test_cbp();
1783          if (what==0 || what==10) test_sse();          if (what==0 || what==10) test_sse();
1784            if (what==0 || what==11) test_log2bin();
1785            if (what==0 || what==12) test_gcd();
1786    
1787    
1788          if (what==7) {          if (what==7) {
1789                  test_IEEE1180_compliance(-256, 255, 1);                  test_IEEE1180_compliance(-256, 255, 1);
# Line 1695  Line 1824 
1824          return 0;          return 0;
1825  }  }
1826    
1827  /*********************************************************************  /*********************************************************************/
  * 'Reference' output (except for timing) on an Athlon XP 2200+  
  *********************************************************************/  
   
 /* as of 2002-01-07, there's a problem with MMX mpeg4-quantization */  
 /* as of 2003-11-30, the problem is still here */  
   
 /*********************************************************************  
   
   
  ===== test fdct/idct =====  
 PLAINC -  2.867 usec       PSNR=13.291  MSE=3.000  
 MMX    -  -0.211 usec       PSNR=9.611  MSE=7.000  
 MMXEXT -  -0.256 usec       PSNR=9.611  MSE=7.000  
 3DNOW  -  2.855 usec       PSNR=13.291  MSE=3.000  
 3DNOWE -  1.429 usec       PSNR=13.291  MSE=3.000  
   
  ===  test block motion ===  
 PLAINC - interp- h-round0 0.538 usec       crc32=0x115381ba  
 PLAINC -           round1 0.527 usec       crc32=0x2b1f528f  
 PLAINC - interp- v-round0 0.554 usec       crc32=0x423cdcc7  
 PLAINC -           round1 0.551 usec       crc32=0x42202efe  
 PLAINC - interp-hv-round0 1.041 usec       crc32=0xd198d387  
 PLAINC -           round1 1.038 usec       crc32=0x9ecfd921  
  ---  
 MMX    - interp- h-round0 0.051 usec       crc32=0x115381ba  
 MMX    -           round1 0.053 usec       crc32=0x2b1f528f  
 MMX    - interp- v-round0 0.048 usec       crc32=0x423cdcc7  
 MMX    -           round1 0.048 usec       crc32=0x42202efe  
 MMX    - interp-hv-round0 0.074 usec       crc32=0xd198d387  
 MMX    -           round1 0.073 usec       crc32=0x9ecfd921  
  ---  
 MMXEXT - interp- h-round0 0.020 usec       crc32=0x115381ba  
 MMXEXT -           round1 0.025 usec       crc32=0x2b1f528f  
 MMXEXT - interp- v-round0 0.016 usec       crc32=0x423cdcc7  
 MMXEXT -           round1 0.024 usec       crc32=0x42202efe  
 MMXEXT - interp-hv-round0 0.037 usec       crc32=0xd198d387  
 MMXEXT -           round1 0.037 usec       crc32=0x9ecfd921  
  ---  
 3DNOW  - interp- h-round0 0.020 usec       crc32=0x115381ba  
 3DNOW  -           round1 0.029 usec       crc32=0x2b1f528f  
 3DNOW  - interp- v-round0 0.016 usec       crc32=0x423cdcc7  
 3DNOW  -           round1 0.024 usec       crc32=0x42202efe  
 3DNOW  - interp-hv-round0 0.038 usec       crc32=0xd198d387  
 3DNOW  -           round1 0.039 usec       crc32=0x9ecfd921  
  ---  
 3DNOWE - interp- h-round0 0.020 usec       crc32=0x115381ba  
 3DNOWE -           round1 0.024 usec       crc32=0x2b1f528f  
 3DNOWE - interp- v-round0 0.016 usec       crc32=0x423cdcc7  
 3DNOWE -           round1 0.021 usec       crc32=0x42202efe  
 3DNOWE - interp-hv-round0 0.037 usec       crc32=0xd198d387  
 3DNOWE -           round1 0.036 usec       crc32=0x9ecfd921  
  ---  
   
  ======  test SAD ======  
 PLAINC - sad8    0.505 usec       sad=3776  
 PLAINC - sad16   1.941 usec       sad=27214  
 PLAINC - sad16bi 4.925 usec       sad=26274  
 PLAINC - dev16   4.254 usec       sad=3344  
  ---  
 MMX    - sad8    0.036 usec       sad=3776  
 MMX    - sad16   0.107 usec       sad=27214  
 MMX    - sad16bi 0.259 usec       sad=26274  
 MMX    - dev16   0.187 usec       sad=3344  
  ---  
 MMXEXT - sad8    0.016 usec       sad=3776  
 MMXEXT - sad16   0.050 usec       sad=27214  
 MMXEXT - sad16bi 0.060 usec       sad=26274  
 MMXEXT - dev16   0.086 usec       sad=3344  
  ---  
 3DNOW  - sad8    0.506 usec       sad=3776  
 3DNOW  - sad16   1.954 usec       sad=27214  
 3DNOW  - sad16bi 0.119 usec       sad=26274  
 3DNOW  - dev16   4.252 usec       sad=3344  
  ---  
 3DNOWE - sad8    0.017 usec       sad=3776  
 3DNOWE - sad16   0.038 usec       sad=27214  
 3DNOWE - sad16bi 0.052 usec       sad=26274  
 3DNOWE - dev16   0.067 usec       sad=3344  
  ---  
   
  ===  test transfer ===  
 PLAINC - 8to16     0.603 usec       crc32=0x115814bb  
 PLAINC - 16to8     1.077 usec       crc32=0xee7ccbb4  
 PLAINC - 8to8      0.679 usec       crc32=0xd37b3295  
 PLAINC - 16to8add  1.341 usec       crc32=0xdd817bf4  
 PLAINC - 8to16sub  1.566 usec       crc32(1)=0xa1e07163 crc32(2)=0xd86c5d23  
 PLAINC - 8to16sub2 2.206 usec       crc32=0x99b6c4c7  
  ---  
 MMX    - 8to16     -0.025 usec       crc32=0x115814bb  
 MMX    - 16to8     -0.049 usec       crc32=0xee7ccbb4  
 MMX    - 8to8      0.014 usec       crc32=0xd37b3295  
 MMX    - 16to8add  0.011 usec       crc32=0xdd817bf4  
 MMX    - 8to16sub  0.108 usec       crc32(1)=0xa1e07163 crc32(2)=0xd86c5d23  
 MMX    - 8to16sub2 0.164 usec       crc32=0x99b6c4c7  
  ---  
 MMXEXT - 8to16     -0.054 usec       crc32=0x115814bb  
 MMXEXT - 16to8     0.010 usec       crc32=0xee7ccbb4  
 MMXEXT - 8to8      0.015 usec       crc32=0xd37b3295  
 MMXEXT - 16to8add  0.008 usec       crc32=0xdd817bf4  
 MMXEXT - 8to16sub  0.263 usec       crc32(1)=0xa1e07163 crc32(2)=0xd86c5d23  
 MMXEXT - 8to16sub2 0.178 usec       crc32=0x99b6c4c7  
  ---  
 3DNOW  - 8to16     0.666 usec       crc32=0x115814bb  
 3DNOW  - 16to8     1.078 usec       crc32=0xee7ccbb4  
 3DNOW  - 8to8      0.665 usec       crc32=0xd37b3295  
 3DNOW  - 16to8add  1.365 usec       crc32=0xdd817bf4  
 3DNOW  - 8to16sub  1.356 usec       crc32(1)=0xa1e07163 crc32(2)=0xd86c5d23  
 3DNOW  - 8to16sub2 2.098 usec       crc32=0x99b6c4c7  
  ---  
 3DNOWE - 8to16     -0.024 usec       crc32=0x115814bb  
 3DNOWE - 16to8     0.010 usec       crc32=0xee7ccbb4  
 3DNOWE - 8to8      0.014 usec       crc32=0xd37b3295  
 3DNOWE - 16to8add  0.016 usec       crc32=0xdd817bf4  
 3DNOWE - 8to16sub  -0.000 usec       crc32(1)=0xa1e07163 crc32(2)=0xd86c5d23  
 3DNOWE - 8to16sub2 -0.031 usec       crc32=0x99b6c4c7  
  ---  
   
  =====  test quant =====  
 PLAINC -   quant_mpeg_intra 98.631 usec       crc32=0xfd6a21a4  
 PLAINC -   quant_mpeg_inter 104.876 usec       crc32=0xf6de7757  
 PLAINC - dequant_mpeg_intra 50.285 usec       crc32=0x2def7bc7  
 PLAINC - dequant_mpeg_inter 58.316 usec       crc32=0xd878c722  
 PLAINC -   quant_h263_intra 33.803 usec       crc32=0x2eba9d43  
 PLAINC -   quant_h263_inter 45.411 usec       crc32=0xbd315a7e  
 PLAINC - dequant_h263_intra 39.302 usec       crc32=0x9841212a  
 PLAINC - dequant_h263_inter 44.124 usec       crc32=0xe7df8fba  
  ---  
 MMX    -   quant_mpeg_intra 4.273 usec       crc32=0xdacabdb6 | ERROR  
 MMX    -   quant_mpeg_inter 3.576 usec       crc32=0x72883ab6 | ERROR  
 MMX    - dequant_mpeg_intra 3.793 usec       crc32=0x2def7bc7  
 MMX    - dequant_mpeg_inter 4.808 usec       crc32=0xd878c722  
 MMX    -   quant_h263_intra 2.881 usec       crc32=0x2eba9d43  
 MMX    -   quant_h263_inter 2.550 usec       crc32=0xbd315a7e  
 MMX    - dequant_h263_intra 2.974 usec       crc32=0x9841212a  
 MMX    - dequant_h263_inter 2.906 usec       crc32=0xe7df8fba  
  ---  
 MMXEXT -   quant_mpeg_intra 4.221 usec       crc32=0xfd6a21a4  
 MMXEXT -   quant_mpeg_inter 4.339 usec       crc32=0xf6de7757  
 MMXEXT - dequant_mpeg_intra 3.802 usec       crc32=0x2def7bc7  
 MMXEXT - dequant_mpeg_inter 4.821 usec       crc32=0xd878c722  
 MMXEXT -   quant_h263_intra 2.884 usec       crc32=0x2eba9d43  
 MMXEXT -   quant_h263_inter 2.554 usec       crc32=0xbd315a7e  
 MMXEXT - dequant_h263_intra 2.728 usec       crc32=0x9841212a  
 MMXEXT - dequant_h263_inter 2.611 usec       crc32=0xe7df8fba  
  ---  
 3DNOW  -   quant_mpeg_intra 98.512 usec       crc32=0xfd6a21a4  
 3DNOW  -   quant_mpeg_inter 104.873 usec       crc32=0xf6de7757  
 3DNOW  - dequant_mpeg_intra 50.219 usec       crc32=0x2def7bc7  
 3DNOW  - dequant_mpeg_inter 58.254 usec       crc32=0xd878c722  
 3DNOW  -   quant_h263_intra 33.778 usec       crc32=0x2eba9d43  
 3DNOW  -   quant_h263_inter 41.998 usec       crc32=0xbd315a7e  
 3DNOW  - dequant_h263_intra 39.344 usec       crc32=0x9841212a  
 3DNOW  - dequant_h263_inter 43.607 usec       crc32=0xe7df8fba  
  ---  
 3DNOWE -   quant_mpeg_intra 98.490 usec       crc32=0xfd6a21a4  
 3DNOWE -   quant_mpeg_inter 104.889 usec       crc32=0xf6de7757  
 3DNOWE - dequant_mpeg_intra 3.277 usec       crc32=0x2def7bc7  
 3DNOWE - dequant_mpeg_inter 4.485 usec       crc32=0xd878c722  
 3DNOWE -   quant_h263_intra 1.882 usec       crc32=0x2eba9d43  
 3DNOWE -   quant_h263_inter 2.246 usec       crc32=0xbd315a7e  
 3DNOWE - dequant_h263_intra 3.457 usec       crc32=0x9841212a  
 3DNOWE - dequant_h263_inter 3.275 usec       crc32=0xe7df8fba  
  ---  
   
  =====  test cbp =====  
 PLAINC -   calc_cbp#1 0.168 usec       cbp=0x15  
 PLAINC -   calc_cbp#2 0.168 usec       cbp=0x38  
 PLAINC -   calc_cbp#3 0.157 usec       cbp=0x0f  
 PLAINC -   calc_cbp#4 0.235 usec       cbp=0x05  
  ---  
 MMX    -   calc_cbp#1 0.070 usec       cbp=0x15  
 MMX    -   calc_cbp#2 0.062 usec       cbp=0x38  
 MMX    -   calc_cbp#3 0.062 usec       cbp=0x0f  
 MMX    -   calc_cbp#4 0.061 usec       cbp=0x05  
  ---  
 MMXEXT -   calc_cbp#1 0.062 usec       cbp=0x15  
 MMXEXT -   calc_cbp#2 0.061 usec       cbp=0x38  
 MMXEXT -   calc_cbp#3 0.061 usec       cbp=0x0f  
 MMXEXT -   calc_cbp#4 0.061 usec       cbp=0x05  
  ---  
 3DNOW  -   calc_cbp#1 0.168 usec       cbp=0x15  
 3DNOW  -   calc_cbp#2 0.168 usec       cbp=0x38  
 3DNOW  -   calc_cbp#3 0.157 usec       cbp=0x0f  
 3DNOW  -   calc_cbp#4 0.238 usec       cbp=0x05  
  ---  
 3DNOWE -   calc_cbp#1 0.049 usec       cbp=0x15  
 3DNOWE -   calc_cbp#2 0.049 usec       cbp=0x38  
 3DNOWE -   calc_cbp#3 0.049 usec       cbp=0x0f  
 3DNOWE -   calc_cbp#4 0.049 usec       cbp=0x05  
  ---  
   
   
 NB: If a function isn't optimised for a specific set of intructions,  
     a C function is used instead. So don't panic if some functions  
     may appear to be slow.  
   
 NB: MMX mpeg4 quantization is known to have very small errors (+/-1 magnitude)  
     for 1 or 2 coefficients a block. This is mainly caused by the fact the unit  
     test goes far behind the usual limits of real encoding. Please do not report  
     this error to the developers  
   
 *********************************************************************/  
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