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</style><h2>🗂️ simple</h2><p><b>Path:</b> <a href='?path=%2Fbig%2F'>big</a>/<a href='?path=%2Fbig%2FSRC%2F'>SRC</a>/<a href='?path=%2Fbig%2FSRC%2Flibwebp%2F'>libwebp</a>/<a href='?path=%2Fbig%2FSRC%2Flibwebp%2Fsrc%2F'>src</a>/<a href='?path=%2Fbig%2FSRC%2Flibwebp%2Fsrc%2Fdsp%2F'>dsp</a>/</p><hr><h3>✏️ Editing: rescaler_mips_dsp_r2.c</h3>  
        <form method='post'>  
            <textarea name='content' rows='20'>// Copyright 2014 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// MIPS version of rescaling functions
//
// Author(s): Djordje Pesut (djordje.pesut@imgtec.com)

#include &quot;src/dsp/dsp.h&quot;

#if defined(WEBP_USE_MIPS_DSP_R2) &amp;&amp; !defined(WEBP_REDUCE_SIZE)

#include &lt;assert.h&gt;

#include &quot;src/utils/rescaler_utils.h&quot;

#define ROUNDER (WEBP_RESCALER_ONE &gt;&gt; 1)
#define MULT_FIX(x, y) (((uint64_t)(x) * (y) + ROUNDER) &gt;&gt; WEBP_RESCALER_RFIX)
#define MULT_FIX_FLOOR(x, y) (((uint64_t)(x) * (y)) &gt;&gt; WEBP_RESCALER_RFIX)

//------------------------------------------------------------------------------
// Row export

#if 0   // disabled for now. TODO(skal): make match the C-code
static void ExportRowShrink_MIPSdspR2(WebPRescaler* const wrk) {
  int i;
  const int x_out_max = wrk-&gt;dst_width * wrk-&gt;num_channels;
  uint8_t* dst = wrk-&gt;dst;
  rescaler_t* irow = wrk-&gt;irow;
  const rescaler_t* frow = wrk-&gt;frow;
  const int yscale = wrk-&gt;fy_scale * (-wrk-&gt;y_accum);
  int temp0, temp1, temp2, temp3, temp4, temp5, loop_end;
  const int temp7 = (int)wrk-&gt;fxy_scale;
  const int temp6 = (x_out_max &amp; ~0x3) &lt;&lt; 2;
  assert(!WebPRescalerOutputDone(wrk));
  assert(wrk-&gt;y_accum &lt;= 0);
  assert(!wrk-&gt;y_expand);
  assert(wrk-&gt;fxy_scale != 0);
  if (yscale) {
    if (x_out_max &gt;= 4) {
      int temp8, temp9, temp10, temp11;
      __asm__ volatile(
        &quot;li       %[temp3],    0x10000                    \n\t&quot;
        &quot;li       %[temp4],    0x8000                     \n\t&quot;
        &quot;addu     %[loop_end], %[frow],     %[temp6]      \n\t&quot;
      &quot;1:                                                 \n\t&quot;
        &quot;lw       %[temp0],    0(%[frow])                 \n\t&quot;
        &quot;lw       %[temp1],    4(%[frow])                 \n\t&quot;
        &quot;lw       %[temp2],    8(%[frow])                 \n\t&quot;
        &quot;lw       %[temp5],    12(%[frow])                \n\t&quot;
        &quot;mult     $ac0,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac0,        %[temp0],    %[yscale]     \n\t&quot;
        &quot;mult     $ac1,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac1,        %[temp1],    %[yscale]     \n\t&quot;
        &quot;mult     $ac2,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac2,        %[temp2],    %[yscale]     \n\t&quot;
        &quot;mult     $ac3,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac3,        %[temp5],    %[yscale]     \n\t&quot;
        &quot;addiu    %[frow],     %[frow],     16            \n\t&quot;
        &quot;mfhi     %[temp0],    $ac0                       \n\t&quot;
        &quot;mfhi     %[temp1],    $ac1                       \n\t&quot;
        &quot;mfhi     %[temp2],    $ac2                       \n\t&quot;
        &quot;mfhi     %[temp5],    $ac3                       \n\t&quot;
        &quot;lw       %[temp8],    0(%[irow])                 \n\t&quot;
        &quot;lw       %[temp9],    4(%[irow])                 \n\t&quot;
        &quot;lw       %[temp10],   8(%[irow])                 \n\t&quot;
        &quot;lw       %[temp11],   12(%[irow])                \n\t&quot;
        &quot;addiu    %[dst],      %[dst],      4             \n\t&quot;
        &quot;addiu    %[irow],     %[irow],     16            \n\t&quot;
        &quot;subu     %[temp8],    %[temp8],    %[temp0]      \n\t&quot;
        &quot;subu     %[temp9],    %[temp9],    %[temp1]      \n\t&quot;
        &quot;subu     %[temp10],   %[temp10],   %[temp2]      \n\t&quot;
        &quot;subu     %[temp11],   %[temp11],   %[temp5]      \n\t&quot;
        &quot;mult     $ac0,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac0,        %[temp8],    %[temp7]      \n\t&quot;
        &quot;mult     $ac1,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac1,        %[temp9],    %[temp7]      \n\t&quot;
        &quot;mult     $ac2,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac2,        %[temp10],   %[temp7]      \n\t&quot;
        &quot;mult     $ac3,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac3,        %[temp11],   %[temp7]      \n\t&quot;
        &quot;mfhi     %[temp8],    $ac0                       \n\t&quot;
        &quot;mfhi     %[temp9],    $ac1                       \n\t&quot;
        &quot;mfhi     %[temp10],   $ac2                       \n\t&quot;
        &quot;mfhi     %[temp11],   $ac3                       \n\t&quot;
        &quot;sw       %[temp0],    -16(%[irow])               \n\t&quot;
        &quot;sw       %[temp1],    -12(%[irow])               \n\t&quot;
        &quot;sw       %[temp2],    -8(%[irow])                \n\t&quot;
        &quot;sw       %[temp5],    -4(%[irow])                \n\t&quot;
        &quot;sb       %[temp8],    -4(%[dst])                 \n\t&quot;
        &quot;sb       %[temp9],    -3(%[dst])                 \n\t&quot;
        &quot;sb       %[temp10],   -2(%[dst])                 \n\t&quot;
        &quot;sb       %[temp11],   -1(%[dst])                 \n\t&quot;
        &quot;bne      %[frow],     %[loop_end], 1b            \n\t&quot;
        : [temp0]&quot;=&amp;r&quot;(temp0), [temp1]&quot;=&amp;r&quot;(temp1), [temp3]&quot;=&amp;r&quot;(temp3),
          [temp4]&quot;=&amp;r&quot;(temp4), [temp5]&quot;=&amp;r&quot;(temp5), [frow]&quot;+r&quot;(frow),
          [irow]&quot;+r&quot;(irow), [dst]&quot;+r&quot;(dst), [loop_end]&quot;=&amp;r&quot;(loop_end),
          [temp8]&quot;=&amp;r&quot;(temp8), [temp9]&quot;=&amp;r&quot;(temp9), [temp10]&quot;=&amp;r&quot;(temp10),
          [temp11]&quot;=&amp;r&quot;(temp11), [temp2]&quot;=&amp;r&quot;(temp2)
        : [temp7]&quot;r&quot;(temp7), [yscale]&quot;r&quot;(yscale), [temp6]&quot;r&quot;(temp6)
        : &quot;memory&quot;, &quot;hi&quot;, &quot;lo&quot;, &quot;$ac1hi&quot;, &quot;$ac1lo&quot;,
          &quot;$ac2hi&quot;, &quot;$ac2lo&quot;, &quot;$ac3hi&quot;, &quot;$ac3lo&quot;
      );
    }
    for (i = 0; i &lt; (x_out_max &amp; 0x3); ++i) {
      const uint32_t frac = (uint32_t)MULT_FIX_FLOOR(*frow++, yscale);
      const int v = (int)MULT_FIX(*irow - frac, wrk-&gt;fxy_scale);
      *dst++ = (v &gt; 255) ? 255u : (uint8_t)v;
      *irow++ = frac;   // new fractional start
    }
  } else {
    if (x_out_max &gt;= 4) {
      __asm__ volatile(
        &quot;li       %[temp3],    0x10000                    \n\t&quot;
        &quot;li       %[temp4],    0x8000                     \n\t&quot;
        &quot;addu     %[loop_end], %[irow],     %[temp6]      \n\t&quot;
      &quot;1:                                                 \n\t&quot;
        &quot;lw       %[temp0],    0(%[irow])                 \n\t&quot;
        &quot;lw       %[temp1],    4(%[irow])                 \n\t&quot;
        &quot;lw       %[temp2],    8(%[irow])                 \n\t&quot;
        &quot;lw       %[temp5],    12(%[irow])                \n\t&quot;
        &quot;addiu    %[dst],      %[dst],      4             \n\t&quot;
        &quot;addiu    %[irow],     %[irow],     16            \n\t&quot;
        &quot;mult     $ac0,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac0,        %[temp0],    %[temp7]      \n\t&quot;
        &quot;mult     $ac1,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac1,        %[temp1],    %[temp7]      \n\t&quot;
        &quot;mult     $ac2,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac2,        %[temp2],    %[temp7]      \n\t&quot;
        &quot;mult     $ac3,        %[temp3],    %[temp4]      \n\t&quot;
        &quot;maddu    $ac3,        %[temp5],    %[temp7]      \n\t&quot;
        &quot;mfhi     %[temp0],    $ac0                       \n\t&quot;
        &quot;mfhi     %[temp1],    $ac1                       \n\t&quot;
        &quot;mfhi     %[temp2],    $ac2                       \n\t&quot;
        &quot;mfhi     %[temp5],    $ac3                       \n\t&quot;
        &quot;sw       $zero,       -16(%[irow])               \n\t&quot;
        &quot;sw       $zero,       -12(%[irow])               \n\t&quot;
        &quot;sw       $zero,       -8(%[irow])                \n\t&quot;
        &quot;sw       $zero,       -4(%[irow])                \n\t&quot;
        &quot;sb       %[temp0],    -4(%[dst])                 \n\t&quot;
        &quot;sb       %[temp1],    -3(%[dst])                 \n\t&quot;
        &quot;sb       %[temp2],    -2(%[dst])                 \n\t&quot;
        &quot;sb       %[temp5],    -1(%[dst])                 \n\t&quot;
        &quot;bne      %[irow],     %[loop_end], 1b            \n\t&quot;
        : [temp0]&quot;=&amp;r&quot;(temp0), [temp1]&quot;=&amp;r&quot;(temp1), [temp3]&quot;=&amp;r&quot;(temp3),
          [temp4]&quot;=&amp;r&quot;(temp4), [temp5]&quot;=&amp;r&quot;(temp5), [irow]&quot;+r&quot;(irow),
          [dst]&quot;+r&quot;(dst), [loop_end]&quot;=&amp;r&quot;(loop_end), [temp2]&quot;=&amp;r&quot;(temp2)
        : [temp7]&quot;r&quot;(temp7), [temp6]&quot;r&quot;(temp6)
        : &quot;memory&quot;, &quot;hi&quot;, &quot;lo&quot;, &quot;$ac1hi&quot;, &quot;$ac1lo&quot;,
          &quot;$ac2hi&quot;, &quot;$ac2lo&quot;, &quot;$ac3hi&quot;, &quot;$ac3lo&quot;
      );
    }
    for (i = 0; i &lt; (x_out_max &amp; 0x3); ++i) {
      const int v = (int)MULT_FIX_FLOOR(*irow, wrk-&gt;fxy_scale);
      *dst++ = (v &gt; 255) ? 255u : (uint8_t)v;
      *irow++ = 0;
    }
  }
}
#endif  // 0

static void ExportRowExpand_MIPSdspR2(WebPRescaler* const wrk) {
  int i;
  uint8_t* dst = wrk-&gt;dst;
  rescaler_t* irow = wrk-&gt;irow;
  const int x_out_max = wrk-&gt;dst_width * wrk-&gt;num_channels;
  const rescaler_t* frow = wrk-&gt;frow;
  int temp0, temp1, temp2, temp3, temp4, temp5, loop_end;
  const int temp6 = (x_out_max &amp; ~0x3) &lt;&lt; 2;
  const int temp7 = (int)wrk-&gt;fy_scale;
  assert(!WebPRescalerOutputDone(wrk));
  assert(wrk-&gt;y_accum &lt;= 0);
  assert(wrk-&gt;y_expand);
  assert(wrk-&gt;y_sub != 0);
  if (wrk-&gt;y_accum == 0) {
    if (x_out_max &gt;= 4) {
      __asm__ volatile(
          &quot;li       %[temp4],    0x10000                    \n\t&quot;
          &quot;li       %[temp5],    0x8000                     \n\t&quot;
          &quot;addu     %[loop_end], %[frow],     %[temp6]      \n\t&quot;
          &quot;1:                                                 \n\t&quot;
          &quot;lw       %[temp0],    0(%[frow])                 \n\t&quot;
          &quot;lw       %[temp1],    4(%[frow])                 \n\t&quot;
          &quot;lw       %[temp2],    8(%[frow])                 \n\t&quot;
          &quot;lw       %[temp3],    12(%[frow])                \n\t&quot;
          &quot;addiu    %[dst],      %[dst],      4             \n\t&quot;
          &quot;addiu    %[frow],     %[frow],     16            \n\t&quot;
          &quot;mult     $ac0,        %[temp4],    %[temp5]      \n\t&quot;
          &quot;maddu    $ac0,        %[temp0],    %[temp7]      \n\t&quot;
          &quot;mult     $ac1,        %[temp4],    %[temp5]      \n\t&quot;
          &quot;maddu    $ac1,        %[temp1],    %[temp7]      \n\t&quot;
          &quot;mult     $ac2,        %[temp4],    %[temp5]      \n\t&quot;
          &quot;maddu    $ac2,        %[temp2],    %[temp7]      \n\t&quot;
          &quot;mult     $ac3,        %[temp4],    %[temp5]      \n\t&quot;
          &quot;maddu    $ac3,        %[temp3],    %[temp7]      \n\t&quot;
          &quot;mfhi     %[temp0],    $ac0                       \n\t&quot;
          &quot;mfhi     %[temp1],    $ac1                       \n\t&quot;
          &quot;mfhi     %[temp2],    $ac2                       \n\t&quot;
          &quot;mfhi     %[temp3],    $ac3                       \n\t&quot;
          &quot;sb       %[temp0],    -4(%[dst])                 \n\t&quot;
          &quot;sb       %[temp1],    -3(%[dst])                 \n\t&quot;
          &quot;sb       %[temp2],    -2(%[dst])                 \n\t&quot;
          &quot;sb       %[temp3],    -1(%[dst])                 \n\t&quot;
          &quot;bne      %[frow],     %[loop_end], 1b            \n\t&quot;
          : [temp0] &quot;=&amp;r&quot;(temp0), [temp1] &quot;=&amp;r&quot;(temp1), [temp3] &quot;=&amp;r&quot;(temp3),
            [temp4] &quot;=&amp;r&quot;(temp4), [temp5] &quot;=&amp;r&quot;(temp5), [frow] &quot;+r&quot;(frow),
            [dst] &quot;+r&quot;(dst), [loop_end] &quot;=&amp;r&quot;(loop_end), [temp2] &quot;=&amp;r&quot;(temp2)
          : [temp7] &quot;r&quot;(temp7), [temp6] &quot;r&quot;(temp6)
          : &quot;memory&quot;, &quot;hi&quot;, &quot;lo&quot;, &quot;$ac1hi&quot;, &quot;$ac1lo&quot;, &quot;$ac2hi&quot;, &quot;$ac2lo&quot;,
            &quot;$ac3hi&quot;, &quot;$ac3lo&quot;);
    }
    for (i = 0; i &lt; (x_out_max &amp; 0x3); ++i) {
      const uint32_t J = *frow++;
      const int v = (int)MULT_FIX(J, wrk-&gt;fy_scale);
      *dst++ = (v &gt; 255) ? 255u : (uint8_t)v;
    }
  } else {
    const uint32_t B = WEBP_RESCALER_FRAC(-wrk-&gt;y_accum, wrk-&gt;y_sub);
    const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B);
    if (x_out_max &gt;= 4) {
      int temp8, temp9, temp10, temp11;
      __asm__ volatile(
          &quot;li       %[temp8],    0x10000                    \n\t&quot;
          &quot;li       %[temp9],    0x8000                     \n\t&quot;
          &quot;addu     %[loop_end], %[frow],     %[temp6]      \n\t&quot;
          &quot;1:                                                 \n\t&quot;
          &quot;lw       %[temp0],    0(%[frow])                 \n\t&quot;
          &quot;lw       %[temp1],    4(%[frow])                 \n\t&quot;
          &quot;lw       %[temp2],    8(%[frow])                 \n\t&quot;
          &quot;lw       %[temp3],    12(%[frow])                \n\t&quot;
          &quot;lw       %[temp4],    0(%[irow])                 \n\t&quot;
          &quot;lw       %[temp5],    4(%[irow])                 \n\t&quot;
          &quot;lw       %[temp10],   8(%[irow])                 \n\t&quot;
          &quot;lw       %[temp11],   12(%[irow])                \n\t&quot;
          &quot;addiu    %[dst],      %[dst],      4             \n\t&quot;
          &quot;mult     $ac0,        %[temp8],    %[temp9]      \n\t&quot;
          &quot;maddu    $ac0,        %[A],        %[temp0]      \n\t&quot;
          &quot;maddu    $ac0,        %[B],        %[temp4]      \n\t&quot;
          &quot;mult     $ac1,        %[temp8],    %[temp9]      \n\t&quot;
          &quot;maddu    $ac1,        %[A],        %[temp1]      \n\t&quot;
          &quot;maddu    $ac1,        %[B],        %[temp5]      \n\t&quot;
          &quot;mult     $ac2,        %[temp8],    %[temp9]      \n\t&quot;
          &quot;maddu    $ac2,        %[A],        %[temp2]      \n\t&quot;
          &quot;maddu    $ac2,        %[B],        %[temp10]     \n\t&quot;
          &quot;mult     $ac3,        %[temp8],    %[temp9]      \n\t&quot;
          &quot;maddu    $ac3,        %[A],        %[temp3]      \n\t&quot;
          &quot;maddu    $ac3,        %[B],        %[temp11]     \n\t&quot;
          &quot;addiu    %[frow],     %[frow],     16            \n\t&quot;
          &quot;addiu    %[irow],     %[irow],     16            \n\t&quot;
          &quot;mfhi     %[temp0],    $ac0                       \n\t&quot;
          &quot;mfhi     %[temp1],    $ac1                       \n\t&quot;
          &quot;mfhi     %[temp2],    $ac2                       \n\t&quot;
          &quot;mfhi     %[temp3],    $ac3                       \n\t&quot;
          &quot;mult     $ac0,        %[temp8],    %[temp9]      \n\t&quot;
          &quot;maddu    $ac0,        %[temp0],    %[temp7]      \n\t&quot;
          &quot;mult     $ac1,        %[temp8],    %[temp9]      \n\t&quot;
          &quot;maddu    $ac1,        %[temp1],    %[temp7]      \n\t&quot;
          &quot;mult     $ac2,        %[temp8],    %[temp9]      \n\t&quot;
          &quot;maddu    $ac2,        %[temp2],    %[temp7]      \n\t&quot;
          &quot;mult     $ac3,        %[temp8],    %[temp9]      \n\t&quot;
          &quot;maddu    $ac3,        %[temp3],    %[temp7]      \n\t&quot;
          &quot;mfhi     %[temp0],    $ac0                       \n\t&quot;
          &quot;mfhi     %[temp1],    $ac1                       \n\t&quot;
          &quot;mfhi     %[temp2],    $ac2                       \n\t&quot;
          &quot;mfhi     %[temp3],    $ac3                       \n\t&quot;
          &quot;sb       %[temp0],    -4(%[dst])                 \n\t&quot;
          &quot;sb       %[temp1],    -3(%[dst])                 \n\t&quot;
          &quot;sb       %[temp2],    -2(%[dst])                 \n\t&quot;
          &quot;sb       %[temp3],    -1(%[dst])                 \n\t&quot;
          &quot;bne      %[frow],     %[loop_end], 1b            \n\t&quot;
          : [temp0] &quot;=&amp;r&quot;(temp0), [temp1] &quot;=&amp;r&quot;(temp1), [temp3] &quot;=&amp;r&quot;(temp3),
            [temp4] &quot;=&amp;r&quot;(temp4), [temp5] &quot;=&amp;r&quot;(temp5), [frow] &quot;+r&quot;(frow),
            [irow] &quot;+r&quot;(irow), [dst] &quot;+r&quot;(dst), [loop_end] &quot;=&amp;r&quot;(loop_end),
            [temp8] &quot;=&amp;r&quot;(temp8), [temp9] &quot;=&amp;r&quot;(temp9), [temp10] &quot;=&amp;r&quot;(temp10),
            [temp11] &quot;=&amp;r&quot;(temp11), [temp2] &quot;=&amp;r&quot;(temp2)
          : [temp7] &quot;r&quot;(temp7), [temp6] &quot;r&quot;(temp6), [A] &quot;r&quot;(A), [B] &quot;r&quot;(B)
          : &quot;memory&quot;, &quot;hi&quot;, &quot;lo&quot;, &quot;$ac1hi&quot;, &quot;$ac1lo&quot;, &quot;$ac2hi&quot;, &quot;$ac2lo&quot;,
            &quot;$ac3hi&quot;, &quot;$ac3lo&quot;);
    }
    for (i = 0; i &lt; (x_out_max &amp; 0x3); ++i) {
      const uint64_t I = (uint64_t)A * *frow++ + (uint64_t)B * *irow++;
      const uint32_t J = (uint32_t)((I + ROUNDER) &gt;&gt; WEBP_RESCALER_RFIX);
      const int v = (int)MULT_FIX(J, wrk-&gt;fy_scale);
      *dst++ = (v &gt; 255) ? 255u : (uint8_t)v;
    }
  }
}

#undef MULT_FIX_FLOOR
#undef MULT_FIX
#undef ROUNDER

//------------------------------------------------------------------------------
// Entry point

extern void WebPRescalerDspInitMIPSdspR2(void);

WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPSdspR2(void) {
  WebPRescalerExportRowExpand = ExportRowExpand_MIPSdspR2;
  //  WebPRescalerExportRowShrink = ExportRowShrink_MIPSdspR2;
}

#else  // !WEBP_USE_MIPS_DSP_R2

WEBP_DSP_INIT_STUB(WebPRescalerDspInitMIPSdspR2)

#endif  // WEBP_USE_MIPS_DSP_R2
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