xref: /external/libvpx/libvpx/vpx_dsp/mips/itrans32_cols_dspr2.c

/*
 *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "./vpx_config.h"
#include "vpx_dsp/mips/inv_txfm_dspr2.h"
#include "vpx_dsp/txfm_common.h"

#if HAVE_DSPR2
void vpx_idct32_cols_add_blk_dspr2(int16_t *input, uint8_t *dest,
                                   int dest_stride) {
  int16_t step1_0, step1_1, step1_2, step1_3, step1_4, step1_5, step1_6;
  int16_t step1_7, step1_8, step1_9, step1_10, step1_11, step1_12, step1_13;
  int16_t step1_14, step1_15, step1_16, step1_17, step1_18, step1_19;
  int16_t step1_20, step1_21, step1_22, step1_23, step1_24, step1_25, step1_26;
  int16_t step1_27, step1_28, step1_29, step1_30, step1_31;
  int16_t step2_0, step2_1, step2_2, step2_3, step2_4, step2_5, step2_6;
  int16_t step2_7, step2_8, step2_9, step2_10, step2_11, step2_12, step2_13;
  int16_t step2_14, step2_15, step2_16, step2_17, step2_18, step2_19, step2_20;
  int16_t step2_21, step2_22, step2_23, step2_24, step2_25, step2_26, step2_27;
  int16_t step2_28, step2_29, step2_30, step2_31;
  int16_t step3_8, step3_9, step3_10, step3_11, step3_12, step3_13, step3_14;
  int16_t step3_15, step3_16, step3_17, step3_18, step3_19, step3_20, step3_21;
  int16_t step3_22, step3_23, step3_24, step3_25, step3_26, step3_27;
  int16_t step3_28, step3_29, step3_30, step3_31;
  int temp0, temp1, temp2, temp3;
  int load1, load2, load3, load4;
  int result1, result2;
  int i, temp21;
  uint8_t *dest_pix, *dest_pix1;
  const int const_2_power_13 = 8192;
  uint8_t *cm = vpx_ff_cropTbl;

  /* prefetch vpx_ff_cropTbl */
  prefetch_load(vpx_ff_cropTbl);
  prefetch_load(vpx_ff_cropTbl +  32);
  prefetch_load(vpx_ff_cropTbl +  64);
  prefetch_load(vpx_ff_cropTbl +  96);
  prefetch_load(vpx_ff_cropTbl + 128);
  prefetch_load(vpx_ff_cropTbl + 160);
  prefetch_load(vpx_ff_cropTbl + 192);
  prefetch_load(vpx_ff_cropTbl + 224);

  for (i = 0; i < 32; ++i) {
    dest_pix = dest + i;
    dest_pix1 = dest + i + 31 * dest_stride;

    __asm__ __volatile__ (
        "lh       %[load1],             2(%[input])                     \n\t"
        "lh       %[load2],             62(%[input])                    \n\t"
        "lh       %[load3],             34(%[input])                    \n\t"
        "lh       %[load4],             30(%[input])                    \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "madd     $ac1,                 %[load1],       %[cospi_31_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_1_64]   \n\t"
        "extp     %[temp0],             $ac1,           31              \n\t"

        "madd     $ac3,                 %[load1],       %[cospi_1_64]   \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_31_64]  \n\t"
        "extp     %[temp3],             $ac3,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac2                            \n\t"
        "mthi     $zero,                $ac2                            \n\t"

        "madd     $ac2,                 %[load3],       %[cospi_15_64]  \n\t"
        "msub     $ac2,                 %[load4],       %[cospi_17_64]  \n\t"
        "extp     %[temp1],             $ac2,           31              \n\t"

        "madd     $ac1,                 %[load3],       %[cospi_17_64]  \n\t"
        "madd     $ac1,                 %[load4],       %[cospi_15_64]  \n\t"
        "extp     %[temp2],             $ac1,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "sub      %[load1],             %[temp3],       %[temp2]        \n\t"
        "sub      %[load2],             %[temp0],       %[temp1]        \n\t"

        "madd     $ac1,                 %[load1],       %[cospi_28_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_4_64]   \n\t"
        "madd     $ac3,                 %[load1],       %[cospi_4_64]   \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_28_64]  \n\t"

        "extp     %[step1_17],          $ac1,           31              \n\t"
        "extp     %[step1_30],          $ac3,           31              \n\t"
        "add      %[step1_16],          %[temp0],       %[temp1]        \n\t"
        "add      %[step1_31],          %[temp2],       %[temp3]        \n\t"

        : [load1] "=&r" (load1), [load2] "=&r" (load2), [load3] "=&r" (load3),
          [load4] "=&r" (load4), [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
          [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
          [step1_16] "=r" (step1_16), [step1_17] "=r" (step1_17),
          [step1_30] "=r" (step1_30), [step1_31] "=r" (step1_31)
        : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
          [cospi_31_64] "r" (cospi_31_64), [cospi_1_64] "r" (cospi_1_64),
          [cospi_4_64] "r" (cospi_4_64), [cospi_17_64] "r" (cospi_17_64),
          [cospi_15_64] "r" (cospi_15_64), [cospi_28_64] "r" (cospi_28_64)
    );

    __asm__ __volatile__ (
        "lh       %[load1],             18(%[input])                    \n\t"
        "lh       %[load2],             46(%[input])                    \n\t"
        "lh       %[load3],             50(%[input])                    \n\t"
        "lh       %[load4],             14(%[input])                    \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "madd     $ac1,                 %[load1],       %[cospi_23_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_9_64]   \n\t"
        "extp     %[temp0],             $ac1,           31              \n\t"

        "madd     $ac3,                 %[load1],       %[cospi_9_64]   \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_23_64]  \n\t"
        "extp     %[temp3],             $ac3,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac2                            \n\t"
        "mthi     $zero,                $ac2                            \n\t"

        "madd     $ac2,                 %[load3],       %[cospi_7_64]   \n\t"
        "msub     $ac2,                 %[load4],       %[cospi_25_64]  \n\t"
        "extp     %[temp1],             $ac2,           31              \n\t"

        "madd     $ac1,                 %[load3],       %[cospi_25_64]  \n\t"
        "madd     $ac1,                 %[load4],       %[cospi_7_64]   \n\t"
        "extp     %[temp2],             $ac1,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "sub      %[load1],             %[temp1],       %[temp0]        \n\t"
        "sub      %[load2],             %[temp2],       %[temp3]        \n\t"

        "msub     $ac1,                 %[load1],       %[cospi_28_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_4_64]   \n\t"
        "msub     $ac3,                 %[load1],       %[cospi_4_64]   \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_28_64]  \n\t"

        "extp     %[step1_18],          $ac1,           31              \n\t"
        "extp     %[step1_29],          $ac3,           31              \n\t"
        "add      %[step1_19],          %[temp0],       %[temp1]        \n\t"
        "add      %[step1_28],          %[temp2],       %[temp3]        \n\t"

        : [load1] "=&r" (load1), [load2] "=&r" (load2), [load3] "=&r" (load3),
          [load4] "=&r" (load4), [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
          [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
          [step1_18] "=r" (step1_18), [step1_19] "=r" (step1_19),
          [step1_28] "=r" (step1_28), [step1_29] "=r" (step1_29)
        : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
          [cospi_23_64] "r" (cospi_23_64), [cospi_9_64] "r" (cospi_9_64),
          [cospi_4_64] "r" (cospi_4_64), [cospi_7_64] "r" (cospi_7_64),
          [cospi_25_64] "r" (cospi_25_64), [cospi_28_64] "r" (cospi_28_64)
    );

    __asm__ __volatile__ (
        "lh       %[load1],             10(%[input])                    \n\t"
        "lh       %[load2],             54(%[input])                    \n\t"
        "lh       %[load3],             42(%[input])                    \n\t"
        "lh       %[load4],             22(%[input])                    \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "madd     $ac1,                 %[load1],       %[cospi_27_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_5_64]   \n\t"
        "extp     %[temp0],             $ac1,           31              \n\t"

        "madd     $ac3,                 %[load1],       %[cospi_5_64]   \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_27_64]  \n\t"
        "extp     %[temp3],             $ac3,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac2                            \n\t"
        "mthi     $zero,                $ac2                            \n\t"

        "madd     $ac2,                 %[load3],       %[cospi_11_64]  \n\t"
        "msub     $ac2,                 %[load4],       %[cospi_21_64]  \n\t"
        "extp     %[temp1],             $ac2,           31              \n\t"

        "madd     $ac1,                 %[load3],       %[cospi_21_64]  \n\t"
        "madd     $ac1,                 %[load4],       %[cospi_11_64]  \n\t"
        "extp     %[temp2],             $ac1,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "sub      %[load1],             %[temp0],       %[temp1]        \n\t"
        "sub      %[load2],             %[temp3],       %[temp2]        \n\t"

        "madd     $ac1,                 %[load2],       %[cospi_12_64]  \n\t"
        "msub     $ac1,                 %[load1],       %[cospi_20_64]  \n\t"
        "madd     $ac3,                 %[load1],       %[cospi_12_64]  \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_20_64]  \n\t"

        "extp     %[step1_21],          $ac1,           31              \n\t"
        "extp     %[step1_26],          $ac3,           31              \n\t"
        "add      %[step1_20],          %[temp0],       %[temp1]        \n\t"
        "add      %[step1_27],          %[temp2],       %[temp3]        \n\t"

        : [load1] "=&r" (load1), [load2] "=&r" (load2), [load3] "=&r" (load3),
          [load4] "=&r" (load4), [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
          [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
          [step1_20] "=r" (step1_20), [step1_21] "=r" (step1_21),
          [step1_26] "=r" (step1_26), [step1_27] "=r" (step1_27)
        : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
          [cospi_27_64] "r" (cospi_27_64), [cospi_5_64] "r" (cospi_5_64),
          [cospi_11_64] "r" (cospi_11_64), [cospi_21_64] "r" (cospi_21_64),
          [cospi_12_64] "r" (cospi_12_64), [cospi_20_64] "r" (cospi_20_64)
    );

    __asm__ __volatile__ (
        "lh       %[load1],             26(%[input])                    \n\t"
        "lh       %[load2],             38(%[input])                    \n\t"
        "lh       %[load3],             58(%[input])                    \n\t"
        "lh       %[load4],              6(%[input])                    \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "madd     $ac1,                 %[load1],       %[cospi_19_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_13_64]  \n\t"
        "extp     %[temp0],             $ac1,           31              \n\t"
        "madd     $ac3,                 %[load1],       %[cospi_13_64]  \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_19_64]  \n\t"
        "extp     %[temp3],             $ac3,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac2                            \n\t"
        "mthi     $zero,                $ac2                            \n\t"

        "madd     $ac2,                 %[load3],       %[cospi_3_64]   \n\t"
        "msub     $ac2,                 %[load4],       %[cospi_29_64]  \n\t"
        "extp     %[temp1],             $ac2,           31              \n\t"
        "madd     $ac1,                 %[load3],       %[cospi_29_64]  \n\t"
        "madd     $ac1,                 %[load4],       %[cospi_3_64]   \n\t"
        "extp     %[temp2],             $ac1,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "sub      %[load1],             %[temp1],       %[temp0]        \n\t"
        "sub      %[load2],             %[temp2],       %[temp3]        \n\t"
        "msub     $ac1,                 %[load1],       %[cospi_12_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_20_64]  \n\t"
        "msub     $ac3,                 %[load1],       %[cospi_20_64]  \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_12_64]  \n\t"
        "extp     %[step1_22],          $ac1,           31              \n\t"
        "extp     %[step1_25],          $ac3,           31              \n\t"
        "add      %[step1_23],          %[temp0],       %[temp1]        \n\t"
        "add      %[step1_24],          %[temp2],       %[temp3]        \n\t"

        : [load1] "=&r" (load1), [load2] "=&r" (load2), [load3] "=&r" (load3),
          [load4] "=&r" (load4), [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
          [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
          [step1_22] "=r" (step1_22), [step1_23] "=r" (step1_23),
          [step1_24] "=r" (step1_24), [step1_25] "=r" (step1_25)
        : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
          [cospi_19_64] "r" (cospi_19_64), [cospi_13_64] "r" (cospi_13_64),
          [cospi_3_64] "r" (cospi_3_64), [cospi_29_64] "r" (cospi_29_64),
          [cospi_12_64] "r" (cospi_12_64), [cospi_20_64] "r" (cospi_20_64)
    );

    __asm__ __volatile__ (
        "lh       %[load1],              4(%[input])                    \n\t"
        "lh       %[load2],             60(%[input])                    \n\t"
        "lh       %[load3],             36(%[input])                    \n\t"
        "lh       %[load4],             28(%[input])                    \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "madd     $ac1,                 %[load1],       %[cospi_30_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_2_64]   \n\t"
        "extp     %[temp0],             $ac1,           31              \n\t"
        "madd     $ac3,                 %[load1],       %[cospi_2_64]   \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_30_64]  \n\t"
        "extp     %[temp3],             $ac3,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac2                            \n\t"
        "mthi     $zero,                $ac2                            \n\t"

        "madd     $ac2,                 %[load3],       %[cospi_14_64]  \n\t"
        "msub     $ac2,                 %[load4],       %[cospi_18_64]  \n\t"
        "extp     %[temp1],             $ac2,           31              \n\t"
        "madd     $ac1,                 %[load3],       %[cospi_18_64]  \n\t"
        "madd     $ac1,                 %[load4],       %[cospi_14_64]  \n\t"
        "extp     %[temp2],             $ac1,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "sub      %[load1],             %[temp0],       %[temp1]        \n\t"
        "sub      %[load2],             %[temp3],       %[temp2]        \n\t"
        "msub     $ac1,                 %[load1],       %[cospi_8_64]   \n\t"
        "madd     $ac1,                 %[load2],       %[cospi_24_64]  \n\t"
        "madd     $ac3,                 %[load1],       %[cospi_24_64]  \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_8_64]   \n\t"
        "extp     %[step2_9],           $ac1,           31              \n\t"
        "extp     %[step2_14],          $ac3,           31              \n\t"
        "add      %[step2_8],           %[temp0],       %[temp1]        \n\t"
        "add      %[step2_15],          %[temp2],       %[temp3]        \n\t"

        : [load1] "=&r" (load1), [load2] "=&r" (load2), [load3] "=&r" (load3),
          [load4] "=&r" (load4), [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
          [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
          [step2_8] "=r" (step2_8), [step2_9] "=r" (step2_9),
          [step2_14] "=r" (step2_14), [step2_15] "=r" (step2_15)
        : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
          [cospi_30_64] "r" (cospi_30_64), [cospi_2_64] "r" (cospi_2_64),
          [cospi_14_64] "r" (cospi_14_64), [cospi_18_64] "r" (cospi_18_64),
          [cospi_8_64] "r" (cospi_8_64), [cospi_24_64] "r" (cospi_24_64)
    );

    __asm__ __volatile__ (
        "lh       %[load1],             20(%[input])                    \n\t"
        "lh       %[load2],             44(%[input])                    \n\t"
        "lh       %[load3],             52(%[input])                    \n\t"
        "lh       %[load4],             12(%[input])                    \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "madd     $ac1,                 %[load1],       %[cospi_22_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_10_64]  \n\t"
        "extp     %[temp0],             $ac1,           31              \n\t"
        "madd     $ac3,                 %[load1],       %[cospi_10_64]  \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_22_64]  \n\t"
        "extp     %[temp3],             $ac3,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac2                            \n\t"
        "mthi     $zero,                $ac2                            \n\t"

        "madd     $ac2,                 %[load3],       %[cospi_6_64]   \n\t"
        "msub     $ac2,                 %[load4],       %[cospi_26_64]  \n\t"
        "extp     %[temp1],             $ac2,           31              \n\t"
        "madd     $ac1,                 %[load3],       %[cospi_26_64]  \n\t"
        "madd     $ac1,                 %[load4],       %[cospi_6_64]   \n\t"
        "extp     %[temp2],             $ac1,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "sub      %[load1],             %[temp1],       %[temp0]        \n\t"
        "sub      %[load2],             %[temp2],       %[temp3]        \n\t"
        "msub     $ac1,                 %[load1],       %[cospi_24_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_8_64]   \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_24_64]  \n\t"
        "msub     $ac3,                 %[load1],       %[cospi_8_64]   \n\t"
        "extp     %[step2_10],          $ac1,           31              \n\t"
        "extp     %[step2_13],          $ac3,           31              \n\t"
        "add      %[step2_11],          %[temp0],       %[temp1]        \n\t"
        "add      %[step2_12],          %[temp2],       %[temp3]        \n\t"

        : [load1] "=&r" (load1), [load2] "=&r" (load2), [load3] "=&r" (load3),
          [load4] "=&r" (load4), [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
          [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
          [step2_10] "=r" (step2_10), [step2_11] "=r" (step2_11),
          [step2_12] "=r" (step2_12), [step2_13] "=r" (step2_13)
        : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
          [cospi_22_64] "r" (cospi_22_64), [cospi_10_64] "r" (cospi_10_64),
          [cospi_6_64] "r" (cospi_6_64), [cospi_26_64] "r" (cospi_26_64),
          [cospi_8_64] "r" (cospi_8_64), [cospi_24_64] "r" (cospi_24_64)
    );

    __asm__ __volatile__ (
        "mtlo     %[const_2_power_13],  $ac0                            \n\t"
        "mthi     $zero,                $ac0                            \n\t"
        "sub      %[temp0],             %[step2_14],    %[step2_13]     \n\t"
        "sub      %[temp0],             %[temp0],       %[step2_9]      \n\t"
        "add      %[temp0],             %[temp0],       %[step2_10]     \n\t"
        "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "sub      %[temp1],             %[step2_14],    %[step2_13]     \n\t"
        "add      %[temp1],             %[temp1],       %[step2_9]      \n\t"
        "sub      %[temp1],             %[temp1],       %[step2_10]     \n\t"
        "madd     $ac1,                 %[temp1],       %[cospi_16_64]  \n\t"
        "mtlo     %[const_2_power_13],  $ac2                            \n\t"
        "mthi     $zero,                $ac2                            \n\t"
        "sub      %[temp0],             %[step2_15],    %[step2_12]     \n\t"
        "sub      %[temp0],             %[temp0],       %[step2_8]      \n\t"
        "add      %[temp0],             %[temp0],       %[step2_11]     \n\t"
        "madd     $ac2,                 %[temp0],       %[cospi_16_64]  \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"
        "sub      %[temp1],             %[step2_15],    %[step2_12]     \n\t"
        "add      %[temp1],             %[temp1],       %[step2_8]      \n\t"
        "sub      %[temp1],             %[temp1],       %[step2_11]     \n\t"
        "madd     $ac3,                 %[temp1],       %[cospi_16_64]  \n\t"

        "add      %[step3_8],           %[step2_8],     %[step2_11]     \n\t"
        "add      %[step3_9],           %[step2_9],     %[step2_10]     \n\t"
        "add      %[step3_14],          %[step2_13],    %[step2_14]     \n\t"
        "add      %[step3_15],          %[step2_12],    %[step2_15]     \n\t"
        "extp     %[step3_10],          $ac0,           31              \n\t"
        "extp     %[step3_13],          $ac1,           31              \n\t"
        "extp     %[step3_11],          $ac2,           31              \n\t"
        "extp     %[step3_12],          $ac3,           31              \n\t"

        : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
          [step3_8] "=r" (step3_8), [step3_9] "=r" (step3_9),
          [step3_10] "=r" (step3_10), [step3_11] "=r" (step3_11),
          [step3_12] "=r" (step3_12), [step3_13] "=r" (step3_13),
          [step3_14] "=r" (step3_14), [step3_15] "=r" (step3_15)
        : [const_2_power_13] "r" (const_2_power_13), [step2_8] "r" (step2_8),
          [step2_9] "r" (step2_9), [step2_10] "r" (step2_10),
          [step2_11] "r" (step2_11), [step2_12] "r" (step2_12),
          [step2_13] "r" (step2_13), [step2_14] "r" (step2_14),
          [step2_15] "r" (step2_15), [cospi_16_64] "r" (cospi_16_64)
    );

    step2_18 = step1_17 - step1_18;
    step2_29 = step1_30 - step1_29;

    __asm__ __volatile__ (
        "mtlo     %[const_2_power_13],  $ac0                            \n\t"
        "mthi     $zero,                $ac0                            \n\t"
        "msub     $ac0,                 %[step2_18],    %[cospi_8_64]   \n\t"
        "madd     $ac0,                 %[step2_29],    %[cospi_24_64]  \n\t"
        "extp     %[step3_18],          $ac0,           31              \n\t"

        : [step3_18] "=r" (step3_18)
        : [const_2_power_13] "r" (const_2_power_13),
          [step2_18] "r" (step2_18), [step2_29] "r" (step2_29),
          [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64)
    );

    temp21 = step2_18 * cospi_24_64 + step2_29 * cospi_8_64;
    step3_29 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;

    step2_19 = step1_16 - step1_19;
    step2_28 = step1_31 - step1_28;

    __asm__ __volatile__ (
        "mtlo     %[const_2_power_13],  $ac0                            \n\t"
        "mthi     $zero,                $ac0                            \n\t"
        "msub     $ac0,                 %[step2_19],    %[cospi_8_64]   \n\t"
        "madd     $ac0,                 %[step2_28],    %[cospi_24_64]  \n\t"
        "extp     %[step3_19],          $ac0,           31              \n\t"

        : [step3_19] "=r" (step3_19)
        : [const_2_power_13] "r" (const_2_power_13),
          [step2_19] "r" (step2_19), [step2_28] "r" (step2_28),
          [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64)
    );

    temp21 = step2_19 * cospi_24_64 + step2_28 * cospi_8_64;
    step3_28 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;

    step3_16 = step1_16 + step1_19;
    step3_17 = step1_17 + step1_18;
    step3_30 = step1_29 + step1_30;
    step3_31 = step1_28 + step1_31;

    step2_20 = step1_23 - step1_20;
    step2_27 = step1_24 - step1_27;

    __asm__ __volatile__ (
        "mtlo     %[const_2_power_13],  $ac0                            \n\t"
        "mthi     $zero,                $ac0                            \n\t"
        "msub     $ac0,                 %[step2_20],    %[cospi_24_64]  \n\t"
        "msub     $ac0,                 %[step2_27],    %[cospi_8_64]   \n\t"
        "extp     %[step3_20],          $ac0,           31              \n\t"

        : [step3_20] "=r" (step3_20)
        : [const_2_power_13] "r" (const_2_power_13),
          [step2_20] "r" (step2_20), [step2_27] "r" (step2_27),
          [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64)
    );

    temp21 = -step2_20 * cospi_8_64 + step2_27 * cospi_24_64;
    step3_27 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;

    step2_21 = step1_22 - step1_21;
    step2_26 = step1_25 - step1_26;

    __asm__ __volatile__ (
        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "msub     $ac1,                 %[step2_21],    %[cospi_24_64]  \n\t"
        "msub     $ac1,                 %[step2_26],    %[cospi_8_64]   \n\t"
        "extp     %[step3_21],          $ac1,           31              \n\t"

        : [step3_21] "=r" (step3_21)
        : [const_2_power_13] "r" (const_2_power_13),
          [step2_21] "r" (step2_21), [step2_26] "r" (step2_26),
          [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64)
    );

    temp21 = -step2_21 * cospi_8_64 + step2_26 * cospi_24_64;
    step3_26 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;

    step3_22 = step1_21 + step1_22;
    step3_23 = step1_20 + step1_23;
    step3_24 = step1_24 + step1_27;
    step3_25 = step1_25 + step1_26;

    step2_16 = step3_16 + step3_23;
    step2_17 = step3_17 + step3_22;
    step2_18 = step3_18 + step3_21;
    step2_19 = step3_19 + step3_20;
    step2_20 = step3_19 - step3_20;
    step2_21 = step3_18 - step3_21;
    step2_22 = step3_17 - step3_22;
    step2_23 = step3_16 - step3_23;

    step2_24 = step3_31 - step3_24;
    step2_25 = step3_30 - step3_25;
    step2_26 = step3_29 - step3_26;
    step2_27 = step3_28 - step3_27;
    step2_28 = step3_28 + step3_27;
    step2_29 = step3_29 + step3_26;
    step2_30 = step3_30 + step3_25;
    step2_31 = step3_31 + step3_24;

    __asm__ __volatile__ (
        "lh       %[load1],             0(%[input])                     \n\t"
        "lh       %[load2],             32(%[input])                    \n\t"
        "lh       %[load3],             16(%[input])                    \n\t"
        "lh       %[load4],             48(%[input])                    \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac2                            \n\t"
        "mthi     $zero,                $ac2                            \n\t"
        "add      %[result1],           %[load1],       %[load2]        \n\t"
        "sub      %[result2],           %[load1],       %[load2]        \n\t"
        "madd     $ac1,                 %[result1],     %[cospi_16_64]  \n\t"
        "madd     $ac2,                 %[result2],     %[cospi_16_64]  \n\t"
        "extp     %[temp0],             $ac1,           31              \n\t"
        "extp     %[temp1],             $ac2,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"
        "madd     $ac3,                 %[load3],       %[cospi_24_64]  \n\t"
        "msub     $ac3,                 %[load4],       %[cospi_8_64]   \n\t"
        "extp     %[temp2],             $ac3,           31              \n\t"
        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "madd     $ac1,                 %[load3],       %[cospi_8_64]   \n\t"
        "madd     $ac1,                 %[load4],       %[cospi_24_64]  \n\t"
        "extp     %[temp3],             $ac1,           31              \n\t"
        "add      %[step1_0],           %[temp0],       %[temp3]        \n\t"
        "add      %[step1_1],           %[temp1],       %[temp2]        \n\t"
        "sub      %[step1_2],           %[temp1],       %[temp2]        \n\t"
        "sub      %[step1_3],           %[temp0],       %[temp3]        \n\t"

        : [load1] "=&r" (load1), [load2] "=&r" (load2),
          [load3] "=&r" (load3), [load4] "=&r" (load4),
          [result1] "=&r" (result1), [result2] "=&r" (result2),
          [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
          [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
          [step1_0] "=r" (step1_0), [step1_1] "=r" (step1_1),
          [step1_2] "=r" (step1_2), [step1_3] "=r" (step1_3)
        : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
          [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64),
          [cospi_16_64] "r" (cospi_16_64)
    );

    __asm__ __volatile__ (
        "lh       %[load1],             8(%[input])                     \n\t"
        "lh       %[load2],             56(%[input])                    \n\t"
        "lh       %[load3],             40(%[input])                    \n\t"
        "lh       %[load4],             24(%[input])                    \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "madd     $ac1,                 %[load1],       %[cospi_28_64]  \n\t"
        "msub     $ac1,                 %[load2],       %[cospi_4_64]   \n\t"
        "extp     %[temp0],             $ac1,           31              \n\t"
        "madd     $ac3,                 %[load1],       %[cospi_4_64]   \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_28_64]  \n\t"
        "extp     %[temp3],             $ac3,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac2                            \n\t"
        "mthi     $zero,                $ac2                            \n\t"

        "madd     $ac2,                 %[load3],       %[cospi_12_64]  \n\t"
        "msub     $ac2,                 %[load4],       %[cospi_20_64]  \n\t"
        "extp     %[temp1],             $ac2,           31              \n\t"
        "madd     $ac1,                 %[load3],       %[cospi_20_64]  \n\t"
        "madd     $ac1,                 %[load4],       %[cospi_12_64]  \n\t"
        "extp     %[temp2],             $ac1,           31              \n\t"

        "mtlo     %[const_2_power_13],  $ac1                            \n\t"
        "mthi     $zero,                $ac1                            \n\t"
        "mtlo     %[const_2_power_13],  $ac3                            \n\t"
        "mthi     $zero,                $ac3                            \n\t"

        "sub      %[load1],             %[temp3],       %[temp2]        \n\t"
        "sub      %[load1],             %[load1],       %[temp0]        \n\t"
        "add      %[load1],             %[load1],       %[temp1]        \n\t"
        "sub      %[load2],             %[temp0],       %[temp1]        \n\t"
        "sub      %[load2],             %[load2],       %[temp2]        \n\t"
        "add      %[load2],             %[load2],       %[temp3]        \n\t"
        "madd     $ac1,                 %[load1],       %[cospi_16_64]  \n\t"
        "madd     $ac3,                 %[load2],       %[cospi_16_64]  \n\t"

        "extp     %[step1_5],           $ac1,           31              \n\t"
        "extp     %[step1_6],           $ac3,           31              \n\t"
        "add      %[step1_4],           %[temp0],       %[temp1]        \n\t"
        "add      %[step1_7],           %[temp3],       %[temp2]        \n\t"

        : [load1] "=&r" (load1), [load2] "=&r" (load2),
          [load3] "=&r" (load3), [load4] "=&r" (load4),
          [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
          [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
          [step1_4] "=r" (step1_4), [step1_5] "=r" (step1_5),
          [step1_6] "=r" (step1_6), [step1_7] "=r" (step1_7)
        : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
          [cospi_20_64] "r" (cospi_20_64), [cospi_12_64] "r" (cospi_12_64),
          [cospi_4_64] "r" (cospi_4_64), [cospi_28_64] "r" (cospi_28_64),
          [cospi_16_64] "r" (cospi_16_64)
    );

    step2_0 = step1_0 + step1_7;
    step2_1 = step1_1 + step1_6;
    step2_2 = step1_2 + step1_5;
    step2_3 = step1_3 + step1_4;
    step2_4 = step1_3 - step1_4;
    step2_5 = step1_2 - step1_5;
    step2_6 = step1_1 - step1_6;
    step2_7 = step1_0 - step1_7;

    // stage 7
    step1_0 = step2_0 + step3_15;
    step1_1 = step2_1 + step3_14;
    step1_2 = step2_2 + step3_13;
    step1_3 = step2_3 + step3_12;
    step1_4 = step2_4 + step3_11;
    step1_5 = step2_5 + step3_10;
    step1_6 = step2_6 + step3_9;
    step1_7 = step2_7 + step3_8;
    step1_8 = step2_7 - step3_8;
    step1_9 = step2_6 - step3_9;
    step1_10 = step2_5 - step3_10;
    step1_11 = step2_4 - step3_11;
    step1_12 = step2_3 - step3_12;
    step1_13 = step2_2 - step3_13;
    step1_14 = step2_1 - step3_14;
    step1_15 = step2_0 - step3_15;

    __asm__ __volatile__ (
        "sub      %[temp0],             %[step2_27],    %[step2_20]     \n\t"
        "mtlo     %[const_2_power_13],  $ac0                            \n\t"
        "mthi     $zero,                $ac0                            \n\t"
        "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
        "extp     %[step1_20],          $ac0,           31              \n\t"

        : [temp0] "=&r" (temp0), [step1_20] "=r" (step1_20)
        : [const_2_power_13] "r" (const_2_power_13), [step2_20] "r" (step2_20),
          [step2_27] "r" (step2_27), [cospi_16_64] "r" (cospi_16_64)
    );

    temp21 = (step2_20 + step2_27) * cospi_16_64;
    step1_27 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;

    __asm__ __volatile__ (
        "sub      %[temp0],             %[step2_26],    %[step2_21]     \n\t"
        "mtlo     %[const_2_power_13],  $ac0                            \n\t"
        "mthi     $zero,                $ac0                            \n\t"
        "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
        "extp     %[step1_21],          $ac0,           31              \n\t"

        : [temp0] "=&r" (temp0), [step1_21] "=r" (step1_21)
        : [const_2_power_13] "r" (const_2_power_13), [step2_26] "r" (step2_26),
          [step2_21] "r" (step2_21), [cospi_16_64] "r" (cospi_16_64)
    );

    temp21 = (step2_21 + step2_26) * cospi_16_64;
    step1_26 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;

    __asm__ __volatile__ (
        "sub      %[temp0],             %[step2_25],    %[step2_22]     \n\t"
        "mtlo     %[const_2_power_13],  $ac0                            \n\t"
        "mthi     $zero,                $ac0                            \n\t"
        "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
        "extp     %[step1_22],          $ac0,           31              \n\t"

        : [temp0] "=&r" (temp0), [step1_22] "=r" (step1_22)
        : [const_2_power_13] "r" (const_2_power_13), [step2_25] "r" (step2_25),
          [step2_22] "r" (step2_22), [cospi_16_64] "r" (cospi_16_64)
    );

    temp21 = (step2_22 + step2_25) * cospi_16_64;
    step1_25 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;

    __asm__ __volatile__ (
        "sub      %[temp0],             %[step2_24],    %[step2_23]     \n\t"
        "mtlo     %[const_2_power_13],  $ac0                            \n\t"
        "mthi     $zero,                $ac0                            \n\t"
        "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
        "extp     %[step1_23],          $ac0,           31              \n\t"

        : [temp0] "=&r" (temp0), [step1_23] "=r" (step1_23)
        : [const_2_power_13] "r" (const_2_power_13), [step2_24] "r" (step2_24),
          [step2_23] "r" (step2_23), [cospi_16_64] "r" (cospi_16_64)
    );

    temp21 = (step2_23 + step2_24) * cospi_16_64;
    step1_24 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;

    __asm__ __volatile__ (
        "lbu      %[temp2],         0(%[dest_pix])                      \n\t"
        "add      %[temp0],         %[step1_0],         %[step2_31]     \n\t"
        "addi     %[temp0],         %[temp0],           32              \n\t"
        "sra      %[temp0],         %[temp0],           6               \n\t"
        "add      %[temp2],         %[temp2],           %[temp0]        \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "add      %[temp1],         %[step1_1],         %[step2_30]     \n\t"
        "sb       %[temp0],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix])                      \n\t"
        "addi     %[temp1],         %[temp1],           32              \n\t"
        "sra      %[temp1],         %[temp1],           6               \n\t"
        "add      %[temp3],         %[temp3],           %[temp1]        \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"

        "lbu      %[temp2],         0(%[dest_pix])                      \n\t"
        "add      %[temp0],         %[step1_2],         %[step2_29]     \n\t"
        "addi     %[temp0],         %[temp0],           32              \n\t"
        "sra      %[temp0],         %[temp0],           6               \n\t"
        "add      %[temp2],         %[temp2],           %[temp0]        \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "add      %[temp1],         %[step1_3],         %[step2_28]     \n\t"
        "sb       %[temp0],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix])                      \n\t"
        "addi     %[temp1],         %[temp1],           32              \n\t"
        "sra      %[temp1],         %[temp1],           6               \n\t"
        "add      %[temp3],         %[temp3],           %[temp1]        \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"

        : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1), [temp2] "=&r" (temp2),
          [temp3] "=&r" (temp3), [dest_pix] "+r" (dest_pix)
        : [cm] "r" (cm), [dest_stride] "r" (dest_stride),
          [step1_0] "r" (step1_0), [step1_1] "r" (step1_1),
          [step1_2] "r" (step1_2), [step1_3] "r" (step1_3),
          [step2_28] "r" (step2_28), [step2_29] "r" (step2_29),
          [step2_30] "r" (step2_30), [step2_31] "r" (step2_31)
    );

    step3_12 = ROUND_POWER_OF_TWO((step1_3 - step2_28), 6);
    step3_13 = ROUND_POWER_OF_TWO((step1_2 - step2_29), 6);
    step3_14 = ROUND_POWER_OF_TWO((step1_1 - step2_30), 6);
    step3_15 = ROUND_POWER_OF_TWO((step1_0 - step2_31), 6);

    __asm__ __volatile__ (
        "lbu      %[temp2],         0(%[dest_pix1])                     \n\t"
        "add      %[temp2],         %[temp2],           %[step3_15]     \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "sb       %[temp0],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix1])                     \n\t"
        "add      %[temp3],         %[temp3],           %[step3_14]     \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"

        "lbu      %[temp2],         0(%[dest_pix1])                     \n\t"
        "add      %[temp2],         %[temp2],           %[step3_13]     \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "sb       %[temp0],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix1])                     \n\t"
        "add      %[temp3],         %[temp3],           %[step3_12]     \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"

        : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1), [temp2] "=&r" (temp2),
          [temp3] "=&r" (temp3), [dest_pix1] "+r" (dest_pix1)
        : [cm] "r" (cm), [dest_stride] "r" (dest_stride),
          [step3_12] "r" (step3_12), [step3_13] "r" (step3_13),
          [step3_14] "r" (step3_14), [step3_15] "r" (step3_15)
    );

    __asm__ __volatile__ (
        "lbu      %[temp2],         0(%[dest_pix])                      \n\t"
        "add      %[temp0],         %[step1_4],         %[step1_27]     \n\t"
        "addi     %[temp0],         %[temp0],           32              \n\t"
        "sra      %[temp0],         %[temp0],           6               \n\t"
        "add      %[temp2],         %[temp2],           %[temp0]        \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "add      %[temp1],         %[step1_5],         %[step1_26]     \n\t"
        "sb       %[temp0],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix])                      \n\t"
        "addi     %[temp1],         %[temp1],           32              \n\t"
        "sra      %[temp1],         %[temp1],           6               \n\t"
        "add      %[temp3],         %[temp3],           %[temp1]        \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"

        "lbu      %[temp2],         0(%[dest_pix])                      \n\t"
        "add      %[temp0],         %[step1_6],         %[step1_25]     \n\t"
        "addi     %[temp0],         %[temp0],           32              \n\t"
        "sra      %[temp0],         %[temp0],           6               \n\t"
        "add      %[temp2],         %[temp2],           %[temp0]        \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "add      %[temp1],         %[step1_7],         %[step1_24]     \n\t"
        "sb       %[temp0],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix])                      \n\t"
        "addi     %[temp1],         %[temp1],           32              \n\t"
        "sra      %[temp1],         %[temp1],           6               \n\t"
        "add      %[temp3],         %[temp3],           %[temp1]        \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"

        : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1), [temp2] "=&r" (temp2),
          [temp3] "=&r" (temp3), [dest_pix] "+r" (dest_pix)
        : [cm] "r" (cm), [dest_stride] "r" (dest_stride),
          [step1_4] "r" (step1_4), [step1_5] "r" (step1_5),
          [step1_6] "r" (step1_6), [step1_7] "r" (step1_7),
          [step1_24] "r" (step1_24), [step1_25] "r" (step1_25),
          [step1_26] "r" (step1_26), [step1_27] "r" (step1_27)
    );

    step3_12 = ROUND_POWER_OF_TWO((step1_7 - step1_24), 6);
    step3_13 = ROUND_POWER_OF_TWO((step1_6 - step1_25), 6);
    step3_14 = ROUND_POWER_OF_TWO((step1_5 - step1_26), 6);
    step3_15 = ROUND_POWER_OF_TWO((step1_4 - step1_27), 6);

    __asm__ __volatile__ (
        "lbu      %[temp2],         0(%[dest_pix1])                     \n\t"
        "add      %[temp2],         %[temp2],           %[step3_15]     \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "sb       %[temp0],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix1])                     \n\t"
        "add      %[temp3],         %[temp3],           %[step3_14]     \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"

        "lbu      %[temp2],         0(%[dest_pix1])                     \n\t"
        "add      %[temp2],         %[temp2],           %[step3_13]     \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "sb       %[temp0],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix1])                     \n\t"
        "add      %[temp3],         %[temp3],           %[step3_12]     \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"

        : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1), [temp2] "=&r" (temp2),
          [temp3] "=&r" (temp3), [dest_pix1] "+r" (dest_pix1)
        : [cm] "r" (cm), [dest_stride] "r" (dest_stride),
          [step3_12] "r" (step3_12), [step3_13] "r" (step3_13),
          [step3_14] "r" (step3_14), [step3_15] "r" (step3_15)
    );

    __asm__ __volatile__ (
        "lbu      %[temp2],         0(%[dest_pix])                      \n\t"
        "add      %[temp0],         %[step1_8],         %[step1_23]     \n\t"
        "addi     %[temp0],         %[temp0],           32              \n\t"
        "sra      %[temp0],         %[temp0],           6               \n\t"
        "add      %[temp2],         %[temp2],           %[temp0]        \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "add      %[temp1],         %[step1_9],         %[step1_22]     \n\t"
        "sb       %[temp0],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix])                      \n\t"
        "addi     %[temp1],         %[temp1],           32              \n\t"
        "sra      %[temp1],         %[temp1],           6               \n\t"
        "add      %[temp3],         %[temp3],           %[temp1]        \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"

        "lbu      %[temp2],         0(%[dest_pix])                      \n\t"
        "add      %[temp0],         %[step1_10],        %[step1_21]     \n\t"
        "addi     %[temp0],         %[temp0],           32              \n\t"
        "sra      %[temp0],         %[temp0],           6               \n\t"
        "add      %[temp2],         %[temp2],           %[temp0]        \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "add      %[temp1],         %[step1_11],        %[step1_20]     \n\t"
        "sb       %[temp0],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix])                      \n\t"
        "addi     %[temp1],         %[temp1],           32              \n\t"
        "sra      %[temp1],         %[temp1],           6               \n\t"
        "add      %[temp3],         %[temp3],           %[temp1]        \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"

        : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1), [temp2] "=&r" (temp2),
          [temp3] "=&r" (temp3), [dest_pix] "+r" (dest_pix)
        : [cm] "r" (cm), [dest_stride] "r" (dest_stride),
          [step1_8] "r" (step1_8), [step1_9] "r" (step1_9),
          [step1_10] "r" (step1_10), [step1_11] "r" (step1_11),
          [step1_20] "r" (step1_20), [step1_21] "r" (step1_21),
          [step1_22] "r" (step1_22), [step1_23] "r" (step1_23)
    );

    step3_12 = ROUND_POWER_OF_TWO((step1_11 - step1_20), 6);
    step3_13 = ROUND_POWER_OF_TWO((step1_10 - step1_21), 6);
    step3_14 = ROUND_POWER_OF_TWO((step1_9 - step1_22), 6);
    step3_15 = ROUND_POWER_OF_TWO((step1_8 - step1_23), 6);

    __asm__ __volatile__ (
        "lbu      %[temp2],         0(%[dest_pix1])                     \n\t"
        "add      %[temp2],         %[temp2],           %[step3_15]     \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "sb       %[temp0],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix1])                     \n\t"
        "add      %[temp3],         %[temp3],           %[step3_14]     \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"

        "lbu      %[temp2],         0(%[dest_pix1])                     \n\t"
        "add      %[temp2],         %[temp2],           %[step3_13]     \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "sb       %[temp0],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix1])                     \n\t"
        "add      %[temp3],         %[temp3],           %[step3_12]     \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"

        : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1), [temp2] "=&r" (temp2),
          [temp3] "=&r" (temp3), [dest_pix1] "+r" (dest_pix1)
        : [cm] "r" (cm), [dest_stride] "r" (dest_stride),
          [step3_12] "r" (step3_12), [step3_13] "r" (step3_13),
          [step3_14] "r" (step3_14), [step3_15] "r" (step3_15)
    );

    __asm__ __volatile__ (
        "lbu      %[temp2],         0(%[dest_pix])                      \n\t"
        "add      %[temp0],         %[step1_12],        %[step2_19]     \n\t"
        "addi     %[temp0],         %[temp0],           32              \n\t"
        "sra      %[temp0],         %[temp0],           6               \n\t"
        "add      %[temp2],         %[temp2],           %[temp0]        \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "add      %[temp1],         %[step1_13],        %[step2_18]     \n\t"
        "sb       %[temp0],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix])                      \n\t"
        "addi     %[temp1],         %[temp1],           32              \n\t"
        "sra      %[temp1],         %[temp1],           6               \n\t"
        "add      %[temp3],         %[temp3],           %[temp1]        \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"

        "lbu      %[temp2],         0(%[dest_pix])                      \n\t"
        "add      %[temp0],         %[step1_14],        %[step2_17]     \n\t"
        "addi     %[temp0],         %[temp0],           32              \n\t"
        "sra      %[temp0],         %[temp0],           6               \n\t"
        "add      %[temp2],         %[temp2],           %[temp0]        \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "add      %[temp1],         %[step1_15],        %[step2_16]     \n\t"
        "sb       %[temp0],         0(%[dest_pix])                      \n\t"
        "addu     %[dest_pix],      %[dest_pix],        %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix])                      \n\t"
        "addi     %[temp1],         %[temp1],           32              \n\t"
        "sra      %[temp1],         %[temp1],           6               \n\t"
        "add      %[temp3],         %[temp3],           %[temp1]        \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix])                      \n\t"

        : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1), [temp2] "=&r" (temp2),
          [temp3] "=&r" (temp3), [dest_pix] "+r" (dest_pix)
        : [cm] "r" (cm), [dest_stride] "r" (dest_stride),
          [step1_12] "r" (step1_12), [step1_13] "r" (step1_13),
          [step1_14] "r" (step1_14), [step1_15] "r" (step1_15),
          [step2_16] "r" (step2_16), [step2_17] "r" (step2_17),
          [step2_18] "r" (step2_18), [step2_19] "r" (step2_19)
    );

    step3_12 = ROUND_POWER_OF_TWO((step1_15 - step2_16), 6);
    step3_13 = ROUND_POWER_OF_TWO((step1_14 - step2_17), 6);
    step3_14 = ROUND_POWER_OF_TWO((step1_13 - step2_18), 6);
    step3_15 = ROUND_POWER_OF_TWO((step1_12 - step2_19), 6);

    __asm__ __volatile__ (
        "lbu      %[temp2],         0(%[dest_pix1])                     \n\t"
        "add      %[temp2],         %[temp2],           %[step3_15]     \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "sb       %[temp0],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix1])                     \n\t"
        "add      %[temp3],         %[temp3],           %[step3_14]     \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"

        "lbu      %[temp2],         0(%[dest_pix1])                     \n\t"
        "add      %[temp2],         %[temp2],           %[step3_13]     \n\t"
        "lbux     %[temp0],         %[temp2](%[cm])                     \n\t"
        "sb       %[temp0],         0(%[dest_pix1])                     \n\t"
        "subu     %[dest_pix1],     %[dest_pix1],       %[dest_stride]  \n\t"
        "lbu      %[temp3],         0(%[dest_pix1])                     \n\t"
        "add      %[temp3],         %[temp3],           %[step3_12]     \n\t"
        "lbux     %[temp1],         %[temp3](%[cm])                     \n\t"
        "sb       %[temp1],         0(%[dest_pix1])                     \n\t"

        : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1), [temp2] "=&r" (temp2),
          [temp3] "=&r" (temp3), [dest_pix1] "+r" (dest_pix1)
        : [cm] "r" (cm), [dest_stride] "r" (dest_stride),
          [step3_12] "r" (step3_12), [step3_13] "r" (step3_13),
          [step3_14] "r" (step3_14), [step3_15] "r" (step3_15)
    );

    input += 32;
  }
}
#endif  // #if HAVE_DSPR2