func: static int RENAME(dct_quantize)(MpegEncContext *s,
  
                              int16_t *block, int n,
  
                              int qscale, int *overflow)
  
  {
  
      x86_reg last_non_zero_p1;
  
      int level=0, q; //=0 is because gcc says uninitialized ...
  
      const uint16_t *qmat, *bias;
  
      LOCAL_ALIGNED_16(int16_t, temp_block, [64]);
  
  
  
      av_assert2((7&(int)(&temp_block[0])) == 0); //did gcc align it correctly?
  
  
  
      //s->fdct (block);
  
      RENAME_FDCT(ff_fdct)(block); // cannot be anything else ...
  
  
  
      if(s->dct_error_sum)
  
          s->denoise_dct(s, block);
  
  
  
      if (s->mb_intra) {
  
          int dummy;
  
          if (n < 4){
  
              q = s->y_dc_scale;
  
              bias = s->q_intra_matrix16[qscale][1];
  
              qmat = s->q_intra_matrix16[qscale][0];
  
          }else{
  
              q = s->c_dc_scale;
  
              bias = s->q_chroma_intra_matrix16[qscale][1];
  
              qmat = s->q_chroma_intra_matrix16[qscale][0];
  
          }
  
          /* note: block[0] is assumed to be positive */
  
          if (!s->h263_aic) {
  
          __asm__ volatile (
  
                  "mul %%ecx                \n\t"
  
                  : "=d" (level), "=a"(dummy)
  
                  : "a" ((block[0]>>2) + q), "c" (ff_inverse[q<<1])
  
          );
  
          } else
  
              /* For AIC we skip quant/dequant of INTRADC */
  
              level = (block[0] + 4)>>3;
  
  
  
          block[0]=0; //avoid fake overflow
  
  //        temp_block[0] = (block[0] + (q >> 1)) / q;
  
          last_non_zero_p1 = 1;
  
      } else {
  
          last_non_zero_p1 = 0;
  
          bias = s->q_inter_matrix16[qscale][1];
  
          qmat = s->q_inter_matrix16[qscale][0];
  
      }
  
  
  
      if((s->out_format == FMT_H263 || s->out_format == FMT_H261) && s->mpeg_quant==0){
  
  
  
          __asm__ volatile(
  
              "movd %%"FF_REG_a", "MM"3           \n\t" // last_non_zero_p1
  
              SPREADW(MM"3")
  
              "pxor "MM"7, "MM"7                  \n\t" // 0
  
              "pxor "MM"4, "MM"4                  \n\t" // 0
  
              MOVQ" (%2), "MM"5                   \n\t" // qmat[0]
  
              "pxor "MM"6, "MM"6                  \n\t"
  
              "psubw (%3), "MM"6                  \n\t" // -bias[0]
  
              "mov $-128, %%"FF_REG_a"            \n\t"
  
              ".p2align 4                         \n\t"
  
              "1:                                 \n\t"
  
              MOVQ" (%1, %%"FF_REG_a"), "MM"0     \n\t" // block[i]
  
              SAVE_SIGN(MM"1", MM"0")                   // ABS(block[i])
  
              "psubusw "MM"6, "MM"0               \n\t" // ABS(block[i]) + bias[0]
  
              "pmulhw "MM"5, "MM"0                \n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16
  
              "por "MM"0, "MM"4                   \n\t"
  
              RESTORE_SIGN(MM"1", MM"0")                // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
  
              MOVQ" "MM"0, (%5, %%"FF_REG_a")     \n\t"
  
              "pcmpeqw "MM"7, "MM"0               \n\t" // out==0 ? 0xFF : 0x00
  
              MOVQ" (%4, %%"FF_REG_a"), "MM"1     \n\t"
  
              MOVQ" "MM"7, (%1, %%"FF_REG_a")     \n\t" // 0
  
              "pandn "MM"1, "MM"0                 \n\t"
  
              PMAXW(MM"0", MM"3")
  
              "add $"MMREG_WIDTH", %%"FF_REG_a"   \n\t"
  
              " js 1b                             \n\t"
  
              PMAX(MM"3", MM"0")
  
              "movd "MM"3, %%"FF_REG_a"           \n\t"
  
              "movzbl %%al, %%eax                 \n\t" // last_non_zero_p1
  
              : "+a" (last_non_zero_p1)
  
              : "r" (block+64), "r" (qmat), "r" (bias),
  
                "r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
  
                XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
  
                                  "%xmm4", "%xmm5", "%xmm6", "%xmm7")
  
          );
  
      }else{ // FMT_H263
  
          __asm__ volatile(
  
              "movd %%"FF_REG_a", "MM"3           \n\t" // last_non_zero_p1
  
              SPREADW(MM"3")
  
              "pxor "MM"7, "MM"7                  \n\t" // 0
  
              "pxor "MM"4, "MM"4                  \n\t" // 0
  
              "mov $-128, %%"FF_REG_a"            \n\t"
  
              ".p2align 4                         \n\t"
  
              "1:                                 \n\t"
  
              MOVQ" (%1, %%"FF_REG_a"), "MM"0     \n\t" // block[i]
  
              SAVE_SIGN(MM"1", MM"0")                   // ABS(block[i])
  
              MOVQ" (%3, %%"FF_REG_a"), "MM"6     \n\t" // bias[0]
  
              "paddusw "MM"6, "MM"0               \n\t" // ABS(block[i]) + bias[0]
  
              MOVQ" (%2, %%"FF_REG_a"), "MM"5     \n\t" // qmat[i]
  
              "pmulhw "MM"5, "MM"0                \n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16
  
              "por "MM"0, "MM"4                   \n\t"
  
              RESTORE_SIGN(MM"1", MM"0")                // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
  
              MOVQ" "MM"0, (%5, %%"FF_REG_a")     \n\t"
  
              "pcmpeqw "MM"7, "MM"0               \n\t" // out==0 ? 0xFF : 0x00
  
              MOVQ" (%4, %%"FF_REG_a"), "MM"1     \n\t"
  
              MOVQ" "MM"7, (%1, %%"FF_REG_a")     \n\t" // 0
  
              "pandn "MM"1, "MM"0                 \n\t"
  
              PMAXW(MM"0", MM"3")
  
              "add $"MMREG_WIDTH", %%"FF_REG_a"   \n\t"
  
              " js 1b                             \n\t"
  
              PMAX(MM"3", MM"0")
  
              "movd "MM"3, %%"FF_REG_a"           \n\t"
  
              "movzbl %%al, %%eax                 \n\t" // last_non_zero_p1
  
              : "+a" (last_non_zero_p1)
  
              : "r" (block+64), "r" (qmat+64), "r" (bias+64),
  
                "r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
  
                XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
  
                                  "%xmm4", "%xmm5", "%xmm6", "%xmm7")
  
          );
  
      }
  
      __asm__ volatile(
  
          "movd %1, "MM"1                     \n\t" // max_qcoeff
  
          SPREADW(MM"1")
  
          "psubusw "MM"1, "MM"4               \n\t"
  
          "packuswb "MM"4, "MM"4              \n\t"
  
  #if COMPILE_TEMPLATE_SSE2
  
          "packsswb "MM"4, "MM"4              \n\t"
  
  #endif
  
          "movd "MM"4, %0                     \n\t" // *overflow
  
          : "=g" (*overflow)
  
          : "g" (s->max_qcoeff)
  
      );
  
  
  
      if(s->mb_intra) block[0]= level;
  
      else            block[0]= temp_block[0];
  
  
  
      if (s->idsp.perm_type == FF_IDCT_PERM_SIMPLE) {
  
          if(last_non_zero_p1 <= 1) goto end;
  
          block[0x08] = temp_block[0x01]; block[0x10] = temp_block[0x08];
  
          block[0x20] = temp_block[0x10];
  
          if(last_non_zero_p1 <= 4) goto end;
  
          block[0x18] = temp_block[0x09]; block[0x04] = temp_block[0x02];
  
          block[0x09] = temp_block[0x03];
  
          if(last_non_zero_p1 <= 7) goto end;
  
          block[0x14] = temp_block[0x0A]; block[0x28] = temp_block[0x11];
  
          block[0x12] = temp_block[0x18]; block[0x02] = temp_block[0x20];
  
          if(last_non_zero_p1 <= 11) goto end;
  
          block[0x1A] = temp_block[0x19]; block[0x24] = temp_block[0x12];
  
          block[0x19] = temp_block[0x0B]; block[0x01] = temp_block[0x04];
  
          block[0x0C] = temp_block[0x05];
  
          if(last_non_zero_p1 <= 16) goto end;
  
          block[0x11] = temp_block[0x0C]; block[0x29] = temp_block[0x13];
  
          block[0x16] = temp_block[0x1A]; block[0x0A] = temp_block[0x21];
  
          block[0x30] = temp_block[0x28]; block[0x22] = temp_block[0x30];
  
          block[0x38] = temp_block[0x29]; block[0x06] = temp_block[0x22];
  
          if(last_non_zero_p1 <= 24) goto end;
  
          block[0x1B] = temp_block[0x1B]; block[0x21] = temp_block[0x14];
  
          block[0x1C] = temp_block[0x0D]; block[0x05] = temp_block[0x06];
  
          block[0x0D] = temp_block[0x07]; block[0x15] = temp_block[0x0E];
  
          block[0x2C] = temp_block[0x15]; block[0x13] = temp_block[0x1C];
  
          if(last_non_zero_p1 <= 32) goto end;
  
          block[0x0B] = temp_block[0x23]; block[0x34] = temp_block[0x2A];
  
          block[0x2A] = temp_block[0x31]; block[0x32] = temp_block[0x38];
  
          block[0x3A] = temp_block[0x39]; block[0x26] = temp_block[0x32];
  
          block[0x39] = temp_block[0x2B]; block[0x03] = temp_block[0x24];
  
          if(last_non_zero_p1 <= 40) goto end;
  
          block[0x1E] = temp_block[0x1D]; block[0x25] = temp_block[0x16];
  
          block[0x1D] = temp_block[0x0F]; block[0x2D] = temp_block[0x17];
  
          block[0x17] = temp_block[0x1E]; block[0x0E] = temp_block[0x25];
  
          block[0x31] = temp_block[0x2C]; block[0x2B] = temp_block[0x33];
  
          if(last_non_zero_p1 <= 48) goto end;
  
          block[0x36] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
  
          block[0x23] = temp_block[0x34]; block[0x3C] = temp_block[0x2D];
  
          block[0x07] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
  
          block[0x0F] = temp_block[0x27]; block[0x35] = temp_block[0x2E];
  
          if(last_non_zero_p1 <= 56) goto end;
  
          block[0x2E] = temp_block[0x35]; block[0x33] = temp_block[0x3C];
  
          block[0x3E] = temp_block[0x3D]; block[0x27] = temp_block[0x36];
  
          block[0x3D] = temp_block[0x2F]; block[0x2F] = temp_block[0x37];
  
          block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
  
      }else if(s->idsp.perm_type == FF_IDCT_PERM_LIBMPEG2){
  
          if(last_non_zero_p1 <= 1) goto end;
  
          block[0x04] = temp_block[0x01];
  
          block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
  
          if(last_non_zero_p1 <= 4) goto end;
  
          block[0x0C] = temp_block[0x09]; block[0x01] = temp_block[0x02];
  
          block[0x05] = temp_block[0x03];
  
          if(last_non_zero_p1 <= 7) goto end;
  
          block[0x09] = temp_block[0x0A]; block[0x14] = temp_block[0x11];
  
          block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
  
          if(last_non_zero_p1 <= 11) goto end;
  
          block[0x1C] = temp_block[0x19];
  
          block[0x11] = temp_block[0x12]; block[0x0D] = temp_block[0x0B];
  
          block[0x02] = temp_block[0x04]; block[0x06] = temp_block[0x05];
  
          if(last_non_zero_p1 <= 16) goto end;
  
          block[0x0A] = temp_block[0x0C]; block[0x15] = temp_block[0x13];
  
          block[0x19] = temp_block[0x1A]; block[0x24] = temp_block[0x21];
  
          block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
  
          block[0x2C] = temp_block[0x29]; block[0x21] = temp_block[0x22];
  
          if(last_non_zero_p1 <= 24) goto end;
  
          block[0x1D] = temp_block[0x1B]; block[0x12] = temp_block[0x14];
  
          block[0x0E] = temp_block[0x0D]; block[0x03] = temp_block[0x06];
  
          block[0x07] = temp_block[0x07]; block[0x0B] = temp_block[0x0E];
  
          block[0x16] = temp_block[0x15]; block[0x1A] = temp_block[0x1C];
  
          if(last_non_zero_p1 <= 32) goto end;
  
          block[0x25] = temp_block[0x23]; block[0x29] = temp_block[0x2A];
  
          block[0x34] = temp_block[0x31]; block[0x38] = temp_block[0x38];
  
          block[0x3C] = temp_block[0x39]; block[0x31] = temp_block[0x32];
  
          block[0x2D] = temp_block[0x2B]; block[0x22] = temp_block[0x24];
  
          if(last_non_zero_p1 <= 40) goto end;
  
          block[0x1E] = temp_block[0x1D]; block[0x13] = temp_block[0x16];
  
          block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
  
          block[0x1B] = temp_block[0x1E]; block[0x26] = temp_block[0x25];
  
          block[0x2A] = temp_block[0x2C]; block[0x35] = temp_block[0x33];
  
          if(last_non_zero_p1 <= 48) goto end;
  
          block[0x39] = temp_block[0x3A]; block[0x3D] = temp_block[0x3B];
  
          block[0x32] = temp_block[0x34]; block[0x2E] = temp_block[0x2D];
  
              block[0x23] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
  
          block[0x27] = temp_block[0x27]; block[0x2B] = temp_block[0x2E];
  
          if(last_non_zero_p1 <= 56) goto end;
  
          block[0x36] = temp_block[0x35]; block[0x3A] = temp_block[0x3C];
  
          block[0x3E] = temp_block[0x3D]; block[0x33] = temp_block[0x36];
  
          block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
  
          block[0x3B] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
  
      }else{
  
          if(last_non_zero_p1 <= 1) goto end;
  
          block[0x01] = temp_block[0x01];
  
          block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
  
          if(last_non_zero_p1 <= 4) goto end;
  
          block[0x09] = temp_block[0x09]; block[0x02] = temp_block[0x02];
  
          block[0x03] = temp_block[0x03];
  
          if(last_non_zero_p1 <= 7) goto end;
  
          block[0x0A] = temp_block[0x0A]; block[0x11] = temp_block[0x11];
  
          block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
  
          if(last_non_zero_p1 <= 11) goto end;
  
          block[0x19] = temp_block[0x19];
  
          block[0x12] = temp_block[0x12]; block[0x0B] = temp_block[0x0B];
  
          block[0x04] = temp_block[0x04]; block[0x05] = temp_block[0x05];
  
          if(last_non_zero_p1 <= 16) goto end;
  
          block[0x0C] = temp_block[0x0C]; block[0x13] = temp_block[0x13];
  
          block[0x1A] = temp_block[0x1A]; block[0x21] = temp_block[0x21];
  
          block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
  
          block[0x29] = temp_block[0x29]; block[0x22] = temp_block[0x22];
  
          if(last_non_zero_p1 <= 24) goto end;
  
          block[0x1B] = temp_block[0x1B]; block[0x14] = temp_block[0x14];
  
          block[0x0D] = temp_block[0x0D]; block[0x06] = temp_block[0x06];
  
          block[0x07] = temp_block[0x07]; block[0x0E] = temp_block[0x0E];
  
          block[0x15] = temp_block[0x15]; block[0x1C] = temp_block[0x1C];
  
          if(last_non_zero_p1 <= 32) goto end;
  
          block[0x23] = temp_block[0x23]; block[0x2A] = temp_block[0x2A];
  
          block[0x31] = temp_block[0x31]; block[0x38] = temp_block[0x38];
  
          block[0x39] = temp_block[0x39]; block[0x32] = temp_block[0x32];
  
          block[0x2B] = temp_block[0x2B]; block[0x24] = temp_block[0x24];
  
          if(last_non_zero_p1 <= 40) goto end;
  
          block[0x1D] = temp_block[0x1D]; block[0x16] = temp_block[0x16];
  
          block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
  
          block[0x1E] = temp_block[0x1E]; block[0x25] = temp_block[0x25];
  
          block[0x2C] = temp_block[0x2C]; block[0x33] = temp_block[0x33];
  
          if(last_non_zero_p1 <= 48) goto end;
  
          block[0x3A] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
  
          block[0x34] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];
  
          block[0x26] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
  
          block[0x27] = temp_block[0x27]; block[0x2E] = temp_block[0x2E];
  
          if(last_non_zero_p1 <= 56) goto end;
  
          block[0x35] = temp_block[0x35]; block[0x3C] = temp_block[0x3C];
  
          block[0x3D] = temp_block[0x3D]; block[0x36] = temp_block[0x36];
  
          block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
  
          block[0x3E] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
  
      }
  
      end:
  
      return last_non_zero_p1 - 1;
  
  }
  