diff --git a/src/dsp/rescaler_mips32.c b/src/dsp/rescaler_mips32.c
index aef9165c..cb544046 100644
--- a/src/dsp/rescaler_mips32.c
+++ b/src/dsp/rescaler_mips32.c
@@ -17,6 +17,113 @@
 
 #include "../utils/rescaler.h"
 
+static void ImportRow(WebPRescaler* const wrk,
+                      const uint8_t* const src, int channel) {
+  const int x_stride = wrk->num_channels;
+  const int x_out_max = wrk->dst_width * wrk->num_channels;
+  const int fx_scale = wrk->fx_scale;
+  const int x_add = wrk->x_add;
+  const int x_sub = wrk->x_sub;
+  const int src_width = wrk->src_width;
+  int* frow = wrk->frow + channel;
+  int* irow = wrk->irow + channel;
+  const uint8_t* src1 = src + channel;
+  int temp1, temp2, temp3, temp4;
+  int base, frac, sum;
+  int accum, accum1;
+  const int x_stride1 = x_stride << 2;
+  int loop_c = x_out_max - channel;
+  int x_out = channel;
+
+  if (!wrk->x_expand) {
+    __asm__ volatile (
+      "li     %[temp1],   0x8000                    \n\t"
+      "li     %[temp2],   0x10000                   \n\t"
+      "li     %[sum],     0                         \n\t"
+      "li     %[accum],   0                         \n\t"
+    "1:                                             \n\t"
+      "addu   %[accum],   %[accum],   %[x_add]      \n\t"
+      "li     %[base],    0                         \n\t"
+      "blez   %[accum],   3f                        \n\t"
+    "2:                                             \n\t"
+      "lbu    %[base],    0(%[src1])                \n\t"
+      "subu   %[accum],   %[accum],   %[x_sub]      \n\t"
+      "addu   %[src1],    %[src1],    %[x_stride]   \n\t"
+      "addu   %[sum],     %[sum],     %[base]       \n\t"
+      "bgtz   %[accum],   2b                        \n\t"
+    "3:                                             \n\t"
+      "negu   %[accum1],  %[accum]                  \n\t"
+      "mul    %[frac],    %[base],    %[accum1]     \n\t"
+      "mul    %[temp3],   %[sum],     %[x_sub]      \n\t"
+      "lw     %[base],    0(%[irow])                \n\t"
+      "subu   %[loop_c],  %[loop_c],  %[x_stride]   \n\t"
+      "sll    %[accum1],  %[frac],    2             \n\t"
+      "mult   %[temp1],   %[temp2]                  \n\t"
+      "madd   %[accum1],  %[fx_scale]               \n\t"
+      "mfhi   %[sum]                                \n\t"
+      "subu   %[temp3],   %[temp3],   %[frac]       \n\t"
+      "sw     %[temp3],   0(%[frow])                \n\t"
+      "addu   %[base],    %[base],    %[temp3]      \n\t"
+      "sw     %[base],    0(%[irow])                \n\t"
+      "addu   %[irow],    %[irow],    %[x_stride1]  \n\t"
+      "addu   %[frow],    %[frow],    %[x_stride1]  \n\t"
+      "bgtz   %[loop_c],  1b                        \n\t"
+      : [accum] "=&r" (accum), [src1] "+r" (src1), [temp3] "=&r" (temp3),
+        [sum] "=&r" (sum), [base] "=&r" (base), [frac] "=&r" (frac),
+        [frow] "+r" (frow), [irow] "+r" (irow), [accum1] "=&r" (accum1),
+        [temp2] "=&r" (temp2), [temp1] "=&r" (temp1)
+      : [x_stride] "r" (x_stride), [fx_scale] "r" (fx_scale),
+        [x_sub] "r" (x_sub), [x_add] "r" (x_add),
+        [loop_c] "r" (loop_c), [x_stride1] "r" (x_stride1)
+      : "memory", "hi", "lo"
+    );
+  } else {
+    __asm__ volatile (
+      "addiu  %[temp3],   %[src_width], -1            \n\t"
+      "lbu    %[temp2],   0(%[src1])                  \n\t"
+      "addu   %[src1],    %[src1],      %[x_stride]   \n\t"
+      "bgtz   %[temp3],   0f                          \n\t"
+      "addiu  %[temp1],   %[temp2],     0             \n\t"
+      "b      3f                                      \n\t"
+    "0:                                               \n\t"
+      "lbu    %[temp1],   0(%[src1])                  \n\t"
+    "3:                                               \n\t"
+      "addiu  %[accum],   %[x_add],     0             \n\t"
+    "1:                                               \n\t"
+      "subu   %[temp3],   %[temp2],     %[temp1]      \n\t"
+      "mul    %[temp3],   %[temp3],     %[accum]      \n\t"
+      "mul    %[temp4],   %[temp1],     %[x_add]      \n\t"
+      "lw     %[frac],    0(%[irow])                  \n\t"
+      "addu   %[temp3],   %[temp4],     %[temp3]      \n\t"
+      "sw     %[temp3],   0(%[frow])                  \n\t"
+      "addu   %[frow],    %[frow],      %[x_stride1]  \n\t"
+      "addu   %[frac],    %[frac],      %[temp3]      \n\t"
+      "addu   %[x_out],   %[x_out],     %[x_stride]   \n\t"
+      "sw     %[frac],    0(%[irow])                  \n\t"
+      "subu   %[temp3],   %[x_out],     %[x_out_max]  \n\t"
+      "addu   %[irow],    %[irow],      %[x_stride1]  \n\t"
+      "bgez   %[temp3],   2f                          \n\t"
+      "subu   %[accum],   %[accum],     %[x_sub]      \n\t"
+      "bgez   %[accum],   4f                          \n\t"
+      "addiu  %[temp2],   %[temp1],     0             \n\t"
+      "addu   %[src1],    %[src1],      %[x_stride]   \n\t"
+      "lbu    %[temp1],   0(%[src1])                  \n\t"
+      "addu   %[accum],   %[accum],     %[x_add]      \n\t"
+    "4:                                               \n\t"
+      "b      1b                                      \n\t"
+    "2:                                               \n\t"
+      : [src1] "+r" (src1), [accum] "=&r" (accum), [temp1] "=&r" (temp1),
+        [temp2] "=&r" (temp2), [temp3] "=&r" (temp3), [temp4] "=&r" (temp4),
+        [x_out] "+r" (x_out), [frac] "=&r" (frac), [frow] "+r" (frow),
+        [irow] "+r" (irow)
+      : [x_stride] "r" (x_stride), [x_add] "r" (x_add), [x_sub] "r" (x_sub),
+        [x_stride1] "r" (x_stride1), [src_width] "r" (src_width),
+        [x_out_max] "r" (x_out_max)
+      : "memory", "hi", "lo"
+    );
+  }
+}
+
 static void ExportRow(WebPRescaler* const wrk, int x_out) {
   if (wrk->y_accum <= 0) {
     uint8_t* const dst = wrk->dst;
@@ -86,6 +193,7 @@ static void ExportRow(WebPRescaler* const wrk, int x_out) {
 extern void WebPRescalerDspInitMIPS32(void);
 
 WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPS32(void) {
+  WebPRescalerImportRow = ImportRow;
   WebPRescalerExportRow = ExportRow;
 }
 
diff --git a/src/dsp/rescaler_mips_dsp_r2.c b/src/dsp/rescaler_mips_dsp_r2.c
index e5f9c28b..ed2fd496 100644
--- a/src/dsp/rescaler_mips_dsp_r2.c
+++ b/src/dsp/rescaler_mips_dsp_r2.c
@@ -17,6 +17,108 @@
 
 #include "../utils/rescaler.h"
 
+static void ImportRow(WebPRescaler* const wrk,
+                      const uint8_t* const src, int channel) {
+  const int x_stride = wrk->num_channels;
+  const int x_out_max = wrk->dst_width * wrk->num_channels;
+  const int fx_scale = wrk->fx_scale;
+  const int x_add = wrk->x_add;
+  const int x_sub = wrk->x_sub;
+  const int src_width = wrk->src_width;
+  int* frow = wrk->frow + channel;
+  int* irow = wrk->irow + channel;
+  const uint8_t* src1 = src + channel;
+  int temp1, temp2, temp3, temp4;
+  int base, frac, sum;
+  int accum, accum1;
+  const int x_stride1 = x_stride << 2;
+  int loop_c = x_out_max - channel;
+  int x_out = channel;
+
+  if (!wrk->x_expand) {
+    __asm__ volatile (
+      "li         %[sum],     0                         \n\t"
+      "li         %[accum],   0                         \n\t"
+    "1:                                                 \n\t"
+      "addu       %[accum],   %[accum],   %[x_add]      \n\t"
+      "li         %[base],    0                         \n\t"
+      "blez       %[accum],   3f                        \n\t"
+    "2:                                                 \n\t"
+      "lbu        %[base],    0(%[src1])                \n\t"
+      "subu       %[accum],   %[accum],   %[x_sub]      \n\t"
+      "addu       %[src1],    %[src1],    %[x_stride]   \n\t"
+      "addu       %[sum],     %[sum],     %[base]       \n\t"
+      "bgtz       %[accum],   2b                        \n\t"
+    "3:                                                 \n\t"
+      "negu       %[accum1],  %[accum]                  \n\t"
+      "mul        %[frac],    %[base],    %[accum1]     \n\t"
+      "mul        %[temp3],   %[sum],     %[x_sub]      \n\t"
+      "lw         %[base],    0(%[irow])                \n\t"
+      "sll        %[accum1],  %[frac],    1             \n\t"
+      "subu       %[loop_c],  %[loop_c],  %[x_stride]   \n\t"
+      "mulq_rs.w  %[sum],     %[accum1],  %[fx_scale]   \n\t"
+      "subu       %[temp3],   %[temp3],   %[frac]       \n\t"
+      "sw         %[temp3],   0(%[frow])                \n\t"
+      "addu       %[base],    %[base],    %[temp3]      \n\t"
+      "sw         %[base],    0(%[irow])                \n\t"
+      "addu       %[irow],    %[irow],    %[x_stride1]  \n\t"
+      "addu       %[frow],    %[frow],    %[x_stride1]  \n\t"
+      "bgtz       %[loop_c],  1b                        \n\t"
+      : [accum]"=&r"(accum), [src1]"+&r"(src1), [temp3]"=&r"(temp3),
+        [sum]"=&r"(sum), [base]"=&r"(base), [frac]"=&r"(frac),
+        [frow]"+&r"(frow), [irow]"+&r"(irow), [accum1]"=&r"(accum1),
+        [loop_c]"+&r"(loop_c)
+      : [x_stride]"r"(x_stride), [fx_scale]"r"(fx_scale), [x_sub]"r"(x_sub),
+        [x_add] "r" (x_add), [x_stride1] "r" (x_stride1)
+      : "memory", "hi", "lo"
+    );
+  } else {
+    __asm__ volatile (
+      "addiu  %[temp3],   %[src_width], -1            \n\t"
+      "lbu    %[temp2],   0(%[src1])                  \n\t"
+      "addu   %[src1],    %[src1],      %[x_stride]   \n\t"
+      "bgtz   %[temp3],   0f                          \n\t"
+      "addiu  %[temp1],   %[temp2],     0             \n\t"
+      "b      3f                                      \n\t"
+    "0:                                               \n\t"
+      "lbu    %[temp1],   0(%[src1])                  \n\t"
+    "3:                                               \n\t"
+      "addiu  %[accum],   %[x_add],     0             \n\t"
+    "1:                                               \n\t"
+      "subu   %[temp3],   %[temp2],     %[temp1]      \n\t"
+      "mul    %[temp3],   %[temp3],     %[accum]      \n\t"
+      "mul    %[temp4],   %[temp1],     %[x_add]      \n\t"
+      "lw     %[frac],    0(%[irow])                  \n\t"
+      "addu   %[temp3],   %[temp4],     %[temp3]      \n\t"
+      "sw     %[temp3],   0(%[frow])                  \n\t"
+      "addu   %[frow],    %[frow],      %[x_stride1]  \n\t"
+      "addu   %[frac],    %[frac],      %[temp3]      \n\t"
+      "addu   %[x_out],   %[x_out],     %[x_stride]   \n\t"
+      "sw     %[frac],    0(%[irow])                  \n\t"
+      "subu   %[temp3],   %[x_out],     %[x_out_max]  \n\t"
+      "addu   %[irow],    %[irow],      %[x_stride1]  \n\t"
+      "bgez   %[temp3],   2f                          \n\t"
+      "subu   %[accum],   %[accum],     %[x_sub]      \n\t"
+      "bgez   %[accum],   4f                          \n\t"
+      "addiu  %[temp2],   %[temp1],     0             \n\t"
+      "addu   %[src1],    %[src1],      %[x_stride]   \n\t"
+      "lbu    %[temp1],   0(%[src1])                  \n\t"
+      "addu   %[accum],   %[accum],     %[x_add]      \n\t"
+    "4:                                               \n\t"
+      "b      1b                                      \n\t"
+    "2:                                               \n\t"
+      : [src1] "+r" (src1), [accum] "=&r" (accum), [temp1] "=&r" (temp1),
+        [temp2] "=&r" (temp2), [temp3] "=&r" (temp3), [temp4] "=&r" (temp4),
+        [x_out] "+r" (x_out), [frac] "=&r" (frac), [frow] "+r" (frow),
+        [irow] "+r" (irow)
+      : [x_stride] "r" (x_stride), [x_add] "r" (x_add), [x_sub] "r" (x_sub),
+        [x_stride1] "r" (x_stride1), [src_width] "r" (src_width),
+        [x_out_max] "r" (x_out_max)
+      : "memory", "hi", "lo"
+    );
+  }
+}
+
 static void ExportRow(WebPRescaler* const wrk, int x_out) {
   if (wrk->y_accum <= 0) {
     // if wrk->fxy_scale can fit into 32 bits use optimized code,
@@ -108,6 +210,7 @@ static void ExportRow(WebPRescaler* const wrk, int x_out) {
 extern void WebPRescalerDspInitMIPSdspR2(void);
 
 WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPSdspR2(void) {
+  WebPRescalerImportRow = ImportRow;
   WebPRescalerExportRow = ExportRow;
 }