Add m-esr52 at 52.6.0

1 files changed, 927 insertions, 0 deletions

diff --git a/gfx/2d/convolverLS3.cpp b/gfx/2d/convolverLS3.cpp
new file mode 100644
index 000000000..a1a41c98b
--- /dev/null
+++ b/gfx/2d/convolverLS3.cpp
@@ -0,0 +1,927 @@
+// Copyright (c) 2014-2015 The Chromium Authors. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+//  * Neither the name of Google, Inc. nor the names of its contributors
+//    may be used to endorse or promote products derived from this
+//    software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+
+#include "convolver.h"
+#include <algorithm>
+#include "skia/include/core/SkTypes.h"
+
+#if defined(_MIPS_ARCH_LOONGSON3A)
+
+#include "MMIHelpers.h"
+
+namespace skia {
+
+// Convolves horizontally along a single row. The row data is given in
+// |src_data| and continues for the num_values() of the filter.
+void ConvolveHorizontally_LS3(const unsigned char* src_data,
+                               const ConvolutionFilter1D& filter,
+                               unsigned char* out_row) {
+  int num_values = filter.num_values();
+  int tmp, filter_offset, filter_length;
+  double zero, mask[4], shuf_50, shuf_fa;
+
+  asm volatile (
+    ".set push \n\t"
+    ".set arch=loongson3a \n\t"
+    "xor %[zero], %[zero], %[zero] \n\t"
+    // |mask| will be used to decimate all extra filter coefficients that are
+    // loaded by SIMD when |filter_length| is not divisible by 4.
+    // mask[0] is not used in following algorithm.
+    "li %[tmp], 1 \n\t"
+    "dsll32 %[tmp], 0x10 \n\t"
+    "daddiu %[tmp], -1 \n\t"
+    "dmtc1 %[tmp], %[mask3] \n\t"
+    "dsrl %[tmp], 0x10 \n\t"
+    "mtc1 %[tmp], %[mask2] \n\t"
+    "dsrl %[tmp], 0x10 \n\t"
+    "mtc1 %[tmp], %[mask1] \n\t"
+    "ori %[tmp], $0, 0x50 \n\t"
+    "mtc1 %[tmp], %[shuf_50] \n\t"
+    "ori %[tmp], $0, 0xfa \n\t"
+    "mtc1 %[tmp], %[shuf_fa] \n\t"
+    ".set pop \n\t"
+    :[zero]"=f"(zero), [mask1]"=f"(mask[1]),
+     [mask2]"=f"(mask[2]), [mask3]"=f"(mask[3]),
+     [shuf_50]"=f"(shuf_50), [shuf_fa]"=f"(shuf_fa),
+     [tmp]"=&r"(tmp)
+  );
+
+  // Output one pixel each iteration, calculating all channels (RGBA) together.
+  for (int out_x = 0; out_x < num_values; out_x++) {
+    const ConvolutionFilter1D::Fixed* filter_values =
+        filter.FilterForValue(out_x, &filter_offset, &filter_length);
+    double accumh, accuml;
+    // Compute the first pixel in this row that the filter affects. It will
+    // touch |filter_length| pixels (4 bytes each) after this.
+    const void *row_to_filter =
+        reinterpret_cast<const void*>(&src_data[filter_offset << 2]);
+
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      _mm_xor(accum, accum, accum)
+      ".set pop \n\t"
+      :[accumh]"=f"(accumh), [accuml]"=f"(accuml)
+    );
+
+    // We will load and accumulate with four coefficients per iteration.
+    for (int filter_x = 0; filter_x < filter_length >> 2; filter_x++) {
+      double src16h, src16l, mul_hih, mul_hil, mul_loh, mul_lol;
+      double coeffh, coeffl, src8h, src8l, th, tl, coeff16h, coeff16l;
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        // Load 4 coefficients => duplicate 1st and 2nd of them for all channels.
+        // [16] xx xx xx xx c3 c2 c1 c0
+        "gsldlc1 %[coeffl], 7(%[fval]) \n\t"
+        "gsldrc1 %[coeffl], (%[fval]) \n\t"
+        "xor %[coeffh], %[coeffh], %[coeffh] \n\t"
+        // [16] xx xx xx xx c1 c1 c0 c0
+        _mm_pshuflh(coeff16, coeff, shuf_50)
+        // [16] c1 c1 c1 c1 c0 c0 c0 c0
+        _mm_punpcklhw(coeff16, coeff16, coeff16)
+        // Load four pixels => unpack the first two pixels to 16 bits =>
+        // multiply with coefficients => accumulate the convolution result.
+        // [8] a3 b3 g3 r3 a2 b2 g2 r2 a1 b1 g1 r1 a0 b0 g0 r0
+        "gsldlc1 %[src8h], 0xf(%[rtf]) \n\t"
+        "gsldrc1 %[src8h], 0x8(%[rtf]) \n\t"
+        "gsldlc1 %[src8l], 0x7(%[rtf]) \n\t"
+        "gsldrc1 %[src8l], 0x0(%[rtf]) \n\t"
+        // [16] a1 b1 g1 r1 a0 b0 g0 r0
+        _mm_punpcklbh(src16, src8, zero)
+        _mm_pmulhh(mul_hi, src16, coeff16)
+        _mm_pmullh(mul_lo, src16, coeff16)
+        // [32]  a0*c0 b0*c0 g0*c0 r0*c0
+        _mm_punpcklhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum, accum, t)
+        // [32]  a1*c1 b1*c1 g1*c1 r1*c1
+        _mm_punpckhhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum, accum, t)
+        // Duplicate 3rd and 4th coefficients for all channels =>
+        // unpack the 3rd and 4th pixels to 16 bits => multiply with coefficients
+        // => accumulate the convolution results.
+        // [16] xx xx xx xx c3 c3 c2 c2
+        _mm_pshuflh(coeff16, coeff, shuf_fa)
+        // [16] c3 c3 c3 c3 c2 c2 c2 c2
+        _mm_punpcklhw(coeff16, coeff16, coeff16)
+        // [16] a3 g3 b3 r3 a2 g2 b2 r2
+        _mm_punpckhbh(src16, src8, zero)
+        _mm_pmulhh(mul_hi, src16, coeff16)
+        _mm_pmullh(mul_lo, src16, coeff16)
+        // [32]  a2*c2 b2*c2 g2*c2 r2*c2
+        _mm_punpcklhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum, accum, t)
+        // [32]  a3*c3 b3*c3 g3*c3 r3*c3
+        _mm_punpckhhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum, accum, t)
+        ".set pop \n\t"
+        :[th]"=&f"(th), [tl]"=&f"(tl),
+         [src8h]"=&f"(src8h), [src8l]"=&f"(src8l),
+         [accumh]"+f"(accumh), [accuml]"+f"(accuml),
+         [src16h]"=&f"(src16h), [src16l]"=&f"(src16l),
+         [coeffh]"=&f"(coeffh), [coeffl]"=&f"(coeffl),
+         [coeff16h]"=&f"(coeff16h), [coeff16l]"=&f"(coeff16l),
+         [mul_hih]"=&f"(mul_hih), [mul_hil]"=&f"(mul_hil),
+         [mul_loh]"=&f"(mul_loh), [mul_lol]"=&f"(mul_lol)
+        :[zeroh]"f"(zero), [zerol]"f"(zero),
+         [shuf_50]"f"(shuf_50), [shuf_fa]"f"(shuf_fa),
+         [fval]"r"(filter_values), [rtf]"r"(row_to_filter)
+      );
+
+      // Advance the pixel and coefficients pointers.
+      row_to_filter += 16;
+      filter_values += 4;
+    }
+
+    // When |filter_length| is not divisible by 4, we need to decimate some of
+    // the filter coefficient that was loaded incorrectly to zero; Other than
+    // that the algorithm is same with above, except that the 4th pixel will be
+    // always absent.
+    int r = filter_length & 3;
+    if (r) {
+      double coeffh, coeffl, th, tl, coeff16h, coeff16l;
+      double src8h, src8l, src16h, src16l, mul_hih, mul_hil, mul_loh, mul_lol;
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        "gsldlc1 %[coeffl], 7(%[fval]) \n\t"
+        "gsldrc1 %[coeffl], (%[fval]) \n\t"
+        "xor %[coeffh], %[coeffh], %[coeffh] \n\t"
+        // Mask out extra filter taps.
+        "and %[coeffl], %[coeffl], %[mask] \n\t"
+        _mm_pshuflh(coeff16, coeff, shuf_50)
+        _mm_punpcklhw(coeff16, coeff16, coeff16)
+        "gsldlc1 %[src8h], 0xf(%[rtf]) \n\t"
+        "gsldrc1 %[src8h], 0x8(%[rtf]) \n\t"
+        "gsldlc1 %[src8l], 0x7(%[rtf]) \n\t"
+        "gsldrc1 %[src8l], 0x0(%[rtf]) \n\t"
+        _mm_punpcklbh(src16, src8, zero)
+        _mm_pmulhh(mul_hi, src16, coeff16)
+        _mm_pmullh(mul_lo, src16, coeff16)
+        _mm_punpcklhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum, accum, t)
+        _mm_punpckhhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum, accum, t)
+        _mm_punpckhbh(src16, src8, zero)
+        _mm_pshuflh(coeff16, coeff, shuf_fa)
+        _mm_punpcklhw(coeff16, coeff16, coeff16)
+        _mm_pmulhh(mul_hi, src16, coeff16)
+        _mm_pmullh(mul_lo, src16, coeff16)
+        _mm_punpcklhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum, accum, t)
+        ".set pop \n\t"
+        :[th]"=&f"(th), [tl]"=&f"(tl),
+         [src8h]"=&f"(src8h), [src8l]"=&f"(src8l),
+         [accumh]"+f"(accumh), [accuml]"+f"(accuml),
+         [src16h]"=&f"(src16h), [src16l]"=&f"(src16l),
+         [coeffh]"=&f"(coeffh), [coeffl]"=&f"(coeffl),
+         [coeff16h]"=&f"(coeff16h), [coeff16l]"=&f"(coeff16l),
+         [mul_hih]"=&f"(mul_hih), [mul_hil]"=&f"(mul_hil),
+         [mul_loh]"=&f"(mul_loh), [mul_lol]"=&f"(mul_lol)
+        :[fval]"r"(filter_values), [rtf]"r"(row_to_filter),
+         [zeroh]"f"(zero), [zerol]"f"(zero), [mask]"f"(mask[r]),
+         [shuf_50]"f"(shuf_50), [shuf_fa]"f"(shuf_fa)
+      );
+    }
+
+    double t, sra;
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      "ori %[tmp], $0, %[sk_sra] \n\t"
+      "mtc1 %[tmp], %[sra] \n\t"
+      // Shift right for fixed point implementation.
+      _mm_psraw(accum, accum, sra)
+      // Packing 32 bits |accum| to 16 bits per channel (signed saturation).
+      _mm_packsswh(accum, accum, zero, t)
+      // Packing 16 bits |accum| to 8 bits per channel (unsigned saturation).
+      _mm_packushb(accum, accum, zero, t)
+      // Store the pixel value of 32 bits.
+      "swc1 %[accuml], (%[out_row]) \n\t"
+      ".set pop \n\t"
+      :[sra]"=&f"(sra), [t]"=&f"(t), [tmp]"=&r"(tmp),
+       [accumh]"+f"(accumh), [accuml]"+f"(accuml)
+      :[sk_sra]"i"(ConvolutionFilter1D::kShiftBits),
+       [out_row]"r"(out_row), [zeroh]"f"(zero), [zerol]"f"(zero)
+      :"memory"
+    );
+
+    out_row += 4;
+  }
+}
+
+// Convolves horizontally along a single row. The row data is given in
+// |src_data| and continues for the [begin, end) of the filter.
+// Process one pixel at a time.
+void ConvolveHorizontally1_LS3(const unsigned char* src_data,
+                               const ConvolutionFilter1D& filter,
+                               unsigned char* out_row) {
+  int num_values = filter.num_values();
+  double zero;
+  double sra;
+
+  asm volatile (
+    ".set push \n"
+    ".set arch=loongson3a \n"
+    "xor %[zero], %[zero], %[zero] \n"
+    "mtc1 %[sk_sra], %[sra] \n"
+    ".set pop \n"
+    :[zero]"=&f"(zero), [sra]"=&f"(sra)
+    :[sk_sra]"r"(ConvolutionFilter1D::kShiftBits)
+  );
+  // Loop over each pixel on this row in the output image.
+  for (int out_x = 0; out_x < num_values; out_x++) {
+    // Get the filter that determines the current output pixel.
+    int filter_offset;
+    int filter_length;
+    const ConvolutionFilter1D::Fixed* filter_values =
+        filter.FilterForValue(out_x, &filter_offset, &filter_length);
+
+    // Compute the first pixel in this row that the filter affects. It will
+    // touch |filter_length| pixels (4 bytes each) after this.
+    const unsigned char* row_to_filter = &src_data[filter_offset * 4];
+
+    // Apply the filter to the row to get the destination pixel in |accum|.
+    double accuml;
+    double accumh;
+    asm volatile (
+      ".set push \n"
+      ".set arch=loongson3a \n"
+      "xor %[accuml], %[accuml], %[accuml] \n"
+      "xor %[accumh], %[accumh], %[accumh] \n"
+      ".set pop \n"
+      :[accuml]"=&f"(accuml), [accumh]"=&f"(accumh)
+    );
+    for (int filter_x = 0; filter_x < filter_length; filter_x++) {
+      double src8;
+      double src16;
+      double coeff;
+      double coeff16;
+      asm volatile (
+        ".set push \n"
+        ".set arch=loongson3a \n"
+        "lwc1 %[src8], %[rtf] \n"
+        "mtc1 %[fv], %[coeff] \n"
+        "pshufh %[coeff16], %[coeff], %[zero] \n"
+        "punpcklbh %[src16], %[src8], %[zero] \n"
+        "pmullh %[src8], %[src16], %[coeff16] \n"
+        "pmulhh %[coeff], %[src16], %[coeff16] \n"
+        "punpcklhw %[src16], %[src8], %[coeff] \n"
+        "punpckhhw %[coeff16], %[src8], %[coeff] \n"
+        "paddw %[accuml], %[accuml], %[src16] \n"
+        "paddw %[accumh], %[accumh], %[coeff16] \n"
+        ".set pop \n"
+        :[accuml]"+f"(accuml), [accumh]"+f"(accumh),
+         [src8]"=&f"(src8), [src16]"=&f"(src16),
+         [coeff]"=&f"(coeff), [coeff16]"=&f"(coeff16)
+        :[rtf]"m"(row_to_filter[filter_x * 4]),
+         [fv]"r"(filter_values[filter_x]), [zero]"f"(zero)
+      );
+    }
+
+    asm volatile (
+      ".set push \n"
+      ".set arch=loongson3a \n"
+      // Bring this value back in range. All of the filter scaling factors
+      // are in fixed point with kShiftBits bits of fractional part.
+      "psraw %[accuml], %[accuml], %[sra] \n"
+      "psraw %[accumh], %[accumh], %[sra] \n"
+      // Store the new pixel.
+      "packsswh %[accuml], %[accuml], %[accumh] \n"
+      "packushb %[accuml], %[accuml], %[zero] \n"
+      "swc1 %[accuml], %[out_row] \n"
+      ".set pop \n"
+      :[accuml]"+f"(accuml), [accumh]"+f"(accumh)
+      :[sra]"f"(sra), [zero]"f"(zero), [out_row]"m"(out_row[out_x * 4])
+      :"memory"
+    );
+  }
+}
+
+// Convolves horizontally along four rows. The row data is given in
+// |src_data| and continues for the num_values() of the filter.
+// The algorithm is almost same as |ConvolveHorizontally_LS3|. Please
+// refer to that function for detailed comments.
+void ConvolveHorizontally4_LS3(const unsigned char* src_data[4],
+                                const ConvolutionFilter1D& filter,
+                                unsigned char* out_row[4]) {
+  int num_values = filter.num_values();
+  int tmp, filter_offset, filter_length;
+  double zero, mask[4], shuf_50, shuf_fa;
+
+  asm volatile (
+    ".set push \n\t"
+    ".set arch=loongson3a \n\t"
+    "xor %[zero], %[zero], %[zero] \n\t"
+    // |mask| will be used to decimate all extra filter coefficients that are
+    // loaded by SIMD when |filter_length| is not divisible by 4.
+    // mask[0] is not used in following algorithm.
+    "li %[tmp], 1 \n\t"
+    "dsll32 %[tmp], 0x10 \n\t"
+    "daddiu %[tmp], -1 \n\t"
+    "dmtc1 %[tmp], %[mask3] \n\t"
+    "dsrl %[tmp], 0x10 \n\t"
+    "mtc1 %[tmp], %[mask2] \n\t"
+    "dsrl %[tmp], 0x10 \n\t"
+    "mtc1 %[tmp], %[mask1] \n\t"
+    "ori %[tmp], $0, 0x50 \n\t"
+    "mtc1 %[tmp], %[shuf_50] \n\t"
+    "ori %[tmp], $0, 0xfa \n\t"
+    "mtc1 %[tmp], %[shuf_fa] \n\t"
+    ".set pop \n\t"
+    :[zero]"=f"(zero), [mask1]"=f"(mask[1]),
+     [mask2]"=f"(mask[2]), [mask3]"=f"(mask[3]),
+     [shuf_50]"=f"(shuf_50), [shuf_fa]"=f"(shuf_fa),
+     [tmp]"=&r"(tmp)
+  );
+
+  // Output one pixel each iteration, calculating all channels (RGBA) together.
+  for (int out_x = 0; out_x < num_values; out_x++) {
+    const ConvolutionFilter1D::Fixed* filter_values =
+        filter.FilterForValue(out_x, &filter_offset, &filter_length);
+    double accum0h, accum0l, accum1h, accum1l;
+    double accum2h, accum2l, accum3h, accum3l;
+
+    // four pixels in a column per iteration.
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      _mm_xor(accum0, accum0, accum0)
+      _mm_xor(accum1, accum1, accum1)
+      _mm_xor(accum2, accum2, accum2)
+      _mm_xor(accum3, accum3, accum3)
+      ".set pop \n\t"
+      :[accum0h]"=f"(accum0h), [accum0l]"=f"(accum0l),
+       [accum1h]"=f"(accum1h), [accum1l]"=f"(accum1l),
+       [accum2h]"=f"(accum2h), [accum2l]"=f"(accum2l),
+       [accum3h]"=f"(accum3h), [accum3l]"=f"(accum3l)
+    );
+
+    int start = (filter_offset<<2);
+    // We will load and accumulate with four coefficients per iteration.
+    for (int filter_x = 0; filter_x < (filter_length >> 2); filter_x++) {
+      double src8h, src8l, src16h, src16l;
+      double mul_hih, mul_hil, mul_loh, mul_lol, th, tl;
+      double coeffh, coeffl, coeff16loh, coeff16lol, coeff16hih, coeff16hil;
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        // [16] xx xx xx xx c3 c2 c1 c0
+        "gsldlc1 %[coeffl], 7(%[fval]) \n\t"
+        "gsldrc1 %[coeffl], (%[fval]) \n\t"
+        "xor %[coeffh], %[coeffh], %[coeffh] \n\t"
+        // [16] xx xx xx xx c1 c1 c0 c0
+        _mm_pshuflh(coeff16lo, coeff, shuf_50)
+        // [16] c1 c1 c1 c1 c0 c0 c0 c0
+        _mm_punpcklhw(coeff16lo, coeff16lo, coeff16lo)
+        // [16] xx xx xx xx c3 c3 c2 c2
+        _mm_pshuflh(coeff16hi, coeff, shuf_fa)
+        // [16] c3 c3 c3 c3 c2 c2 c2 c2
+        _mm_punpcklhw(coeff16hi, coeff16hi, coeff16hi)
+        ".set pop \n\t"
+        :[coeffh]"=&f"(coeffh), [coeffl]"=&f"(coeffl),
+         [coeff16loh]"=&f"(coeff16loh), [coeff16lol]"=&f"(coeff16lol),
+         [coeff16hih]"=&f"(coeff16hih), [coeff16hil]"=&f"(coeff16hil)
+        :[fval]"r"(filter_values), [shuf_50]"f"(shuf_50), [shuf_fa]"f"(shuf_fa)
+      );
+
+#define ITERATION(_src, _accumh, _accuml)                              \
+      asm volatile (                                                   \
+        ".set push \n\t"                                               \
+        ".set arch=loongson3a \n\t"                                    \
+        "gsldlc1 %[src8h], 0xf(%[src]) \n\t"                           \
+        "gsldrc1 %[src8h], 0x8(%[src]) \n\t"                           \
+        "gsldlc1 %[src8l], 0x7(%[src]) \n\t"                           \
+        "gsldrc1 %[src8l], 0x0(%[src]) \n\t"                           \
+        _mm_punpcklbh(src16, src8, zero)                               \
+        _mm_pmulhh(mul_hi, src16, coeff16lo)                           \
+        _mm_pmullh(mul_lo, src16, coeff16lo)                           \
+        _mm_punpcklhw(t, mul_lo, mul_hi)                               \
+        _mm_paddw(accum, accum, t)                                     \
+        _mm_punpckhhw(t, mul_lo, mul_hi)                               \
+        _mm_paddw(accum, accum, t)                                     \
+        _mm_punpckhbh(src16, src8, zero)                               \
+        _mm_pmulhh(mul_hi, src16, coeff16hi)                           \
+        _mm_pmullh(mul_lo, src16, coeff16hi)                           \
+        _mm_punpcklhw(t, mul_lo, mul_hi)                               \
+        _mm_paddw(accum, accum, t)                                     \
+        _mm_punpckhhw(t, mul_lo, mul_hi)                               \
+        _mm_paddw(accum, accum, t)                                     \
+        ".set pop \n\t"                                                \
+        :[th]"=&f"(th), [tl]"=&f"(tl),                                 \
+         [src8h]"=&f"(src8h), [src8l]"=&f"(src8l),                     \
+         [src16h]"=&f"(src16h), [src16l]"=&f"(src16l),                 \
+         [mul_hih]"=&f"(mul_hih), [mul_hil]"=&f"(mul_hil),             \
+         [mul_loh]"=&f"(mul_loh), [mul_lol]"=&f"(mul_lol),             \
+         [accumh]"+f"(_accumh), [accuml]"+f"(_accuml)                  \
+        :[zeroh]"f"(zero), [zerol]"f"(zero), [src]"r"(_src),           \
+         [coeff16loh]"f"(coeff16loh), [coeff16lol]"f"(coeff16lol),     \
+         [coeff16hih]"f"(coeff16hih), [coeff16hil]"f"(coeff16hil)      \
+      );
+
+      ITERATION(src_data[0] + start, accum0h, accum0l);
+      ITERATION(src_data[1] + start, accum1h, accum1l);
+      ITERATION(src_data[2] + start, accum2h, accum2l);
+      ITERATION(src_data[3] + start, accum3h, accum3l);
+
+      start += 16;
+      filter_values += 4;
+    }
+
+    int r = filter_length & 3;
+    if (r) {
+      double src8h, src8l, src16h, src16l;
+      double mul_hih, mul_hil, mul_loh, mul_lol, th, tl;
+      double coeffh, coeffl, coeff16loh, coeff16lol, coeff16hih, coeff16hil;
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        "gsldlc1 %[coeffl], 7(%[fval]) \n\t"
+        "gsldrc1 %[coeffl], (%[fval]) \n\t"
+        "xor %[coeffh], %[coeffh], %[coeffh] \n\t"
+        // Mask out extra filter taps.
+        "and %[coeffl], %[coeffl], %[mask] \n\t"
+        _mm_pshuflh(coeff16lo, coeff, shuf_50)
+        /* c1 c1 c1 c1 c0 c0 c0 c0 */
+        _mm_punpcklhw(coeff16lo, coeff16lo, coeff16lo)
+        _mm_pshuflh(coeff16hi, coeff, shuf_fa)
+        _mm_punpcklhw(coeff16hi, coeff16hi, coeff16hi)
+        ".set pop \n\t"
+        :[coeffh]"=&f"(coeffh), [coeffl]"=&f"(coeffl),
+         [coeff16loh]"=&f"(coeff16loh), [coeff16lol]"=&f"(coeff16lol),
+         [coeff16hih]"=&f"(coeff16hih), [coeff16hil]"=&f"(coeff16hil)
+        :[fval]"r"(filter_values), [mask]"f"(mask[r]),
+         [shuf_50]"f"(shuf_50), [shuf_fa]"f"(shuf_fa)
+      );
+
+      ITERATION(src_data[0] + start, accum0h, accum0l);
+      ITERATION(src_data[1] + start, accum1h, accum1l);
+      ITERATION(src_data[2] + start, accum2h, accum2l);
+      ITERATION(src_data[3] + start, accum3h, accum3l);
+    }
+
+    double t, sra;
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      "ori %[tmp], $0, %[sk_sra] \n\t"
+      "mtc1 %[tmp], %[sra] \n\t"
+      _mm_psraw(accum0, accum0, sra)
+      _mm_packsswh(accum0, accum0, zero, t)
+      _mm_packushb(accum0, accum0, zero, t)
+      _mm_psraw(accum1, accum1, sra)
+      _mm_packsswh(accum1, accum1, zero, t)
+      _mm_packushb(accum1, accum1, zero, t)
+      _mm_psraw(accum2, accum2, sra)
+      _mm_packsswh(accum2, accum2, zero, t)
+      _mm_packushb(accum2, accum2, zero, t)
+      _mm_psraw(accum3, accum3, sra)
+      _mm_packsswh(accum3, accum3, zero, t)
+      _mm_packushb(accum3, accum3, zero, t)
+      "swc1 %[accum0l], (%[out_row0]) \n\t"
+      "swc1 %[accum1l], (%[out_row1]) \n\t"
+      "swc1 %[accum2l], (%[out_row2]) \n\t"
+      "swc1 %[accum3l], (%[out_row3]) \n\t"
+      ".set pop \n\t"
+      :[accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l),
+       [accum1h]"+f"(accum1h), [accum1l]"+f"(accum1l),
+       [accum2h]"+f"(accum2h), [accum2l]"+f"(accum2l),
+       [accum3h]"+f"(accum3h), [accum3l]"+f"(accum3l),
+       [sra]"=&f"(sra), [t]"=&f"(t), [tmp]"=&r"(tmp)
+      :[zeroh]"f"(zero), [zerol]"f"(zero),
+       [out_row0]"r"(out_row[0]), [out_row1]"r"(out_row[1]),
+       [out_row2]"r"(out_row[2]), [out_row3]"r"(out_row[3]),
+       [sk_sra]"i"(ConvolutionFilter1D::kShiftBits)
+      :"memory"
+    );
+
+    out_row[0] += 4;
+    out_row[1] += 4;
+    out_row[2] += 4;
+    out_row[3] += 4;
+  }
+}
+
+// Does vertical convolution to produce one output row. The filter values and
+// length are given in the first two parameters. These are applied to each
+// of the rows pointed to in the |source_data_rows| array, with each row
+// being |pixel_width| wide.
+//
+// The output must have room for |pixel_width * 4| bytes.
+template<bool has_alpha>
+void ConvolveVertically_LS3_impl(const ConvolutionFilter1D::Fixed* filter_values,
+                                  int filter_length,
+                                  unsigned char* const* source_data_rows,
+                                  int pixel_width,
+                                  unsigned char* out_row) {
+  uint64_t tmp;
+  int width = pixel_width & ~3;
+  double zero, sra, coeff16h, coeff16l;
+  double accum0h, accum0l, accum1h, accum1l;
+  double accum2h, accum2l, accum3h, accum3l;
+  const void *src;
+  int out_x;
+
+  asm volatile (
+    ".set push \n\t"
+    ".set arch=loongson3a \n\t"
+    "xor %[zero], %[zero], %[zero] \n\t"
+    "ori %[tmp], $0, %[sk_sra] \n\t"
+    "mtc1 %[tmp], %[sra] \n\t"
+    ".set pop \n\t"
+    :[zero]"=f"(zero), [sra]"=f"(sra), [tmp]"=&r"(tmp)
+    :[sk_sra]"i"(ConvolutionFilter1D::kShiftBits)
+  );
+
+  // Output four pixels per iteration (16 bytes).
+  for (out_x = 0; out_x < width; out_x += 4) {
+    // Accumulated result for each pixel. 32 bits per RGBA channel.
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      _mm_xor(accum0, accum0, accum0)
+      _mm_xor(accum1, accum1, accum1)
+      _mm_xor(accum2, accum2, accum2)
+      _mm_xor(accum3, accum3, accum3)
+      ".set pop \n\t"
+      :[accum0h]"=f"(accum0h), [accum0l]"=f"(accum0l),
+       [accum1h]"=f"(accum1h), [accum1l]"=f"(accum1l),
+       [accum2h]"=f"(accum2h), [accum2l]"=f"(accum2l),
+       [accum3h]"=f"(accum3h), [accum3l]"=f"(accum3l)
+    );
+
+    // Convolve with one filter coefficient per iteration.
+    for (int filter_y = 0; filter_y < filter_length; filter_y++) {
+      double src8h, src8l, src16h, src16l;
+      double mul_hih, mul_hil, mul_loh, mul_lol, th, tl;
+
+      src = reinterpret_cast<const void*>(
+          &source_data_rows[filter_y][out_x << 2]);
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        // Duplicate the filter coefficient 8 times.
+        // [16] cj cj cj cj cj cj cj cj
+        "gsldlc1 %[coeff16l], 7+%[fval] \n\t"
+        "gsldrc1 %[coeff16l], %[fval] \n\t"
+        "pshufh %[coeff16l], %[coeff16l], %[zerol] \n\t"
+        "mov.d %[coeff16h], %[coeff16l] \n\t"
+        // Load four pixels (16 bytes) together.
+        // [8] a3 b3 g3 r3 a2 b2 g2 r2 a1 b1 g1 r1 a0 b0 g0 r0
+        "gsldlc1 %[src8h], 0xf(%[src]) \n\t"
+        "gsldrc1 %[src8h], 0x8(%[src]) \n\t"
+        "gsldlc1 %[src8l], 0x7(%[src]) \n\t"
+        "gsldrc1 %[src8l], 0x0(%[src]) \n\t"
+        // Unpack 1st and 2nd pixels from 8 bits to 16 bits for each channels =>
+        // multiply with current coefficient => accumulate the result.
+        // [16] a1 b1 g1 r1 a0 b0 g0 r0
+        _mm_punpcklbh(src16, src8, zero)
+        _mm_pmulhh(mul_hi, src16, coeff16)
+        _mm_pmullh(mul_lo, src16, coeff16)
+        // [32] a0 b0 g0 r0
+        _mm_punpcklhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum0, accum0, t)
+        // [32] a1 b1 g1 r1
+        _mm_punpckhhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum1, accum1, t)
+        // Unpack 3rd and 4th pixels from 8 bits to 16 bits for each channels =>
+        // multiply with current coefficient => accumulate the result.
+        // [16] a3 b3 g3 r3 a2 b2 g2 r2
+        _mm_punpckhbh(src16, src8, zero)
+        _mm_pmulhh(mul_hi, src16, coeff16)
+        _mm_pmullh(mul_lo, src16, coeff16)
+        ".set pop \n\t"
+        :[th]"=&f"(th), [tl]"=&f"(tl),
+         [src8h]"=&f"(src8h), [src8l]"=&f"(src8l),
+         [src16h]"=&f"(src16h), [src16l]"=&f"(src16l),
+         [mul_hih]"=&f"(mul_hih), [mul_hil]"=&f"(mul_hil),
+         [mul_loh]"=&f"(mul_loh), [mul_lol]"=&f"(mul_lol),
+         [accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l),
+         [accum1h]"+f"(accum1h), [accum1l]"+f"(accum1l),
+         [coeff16h]"=&f"(coeff16h), [coeff16l]"=&f"(coeff16l)
+        :[zeroh]"f"(zero), [zerol]"f"(zero),
+         [fval]"m"(filter_values[filter_y]),
+         [src]"r"(src)
+      );
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        // [32] a2 b2 g2 r2
+        _mm_punpcklhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum2, accum2, t)
+        // [32] a3 b3 g3 r3
+        _mm_punpckhhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum3, accum3, t)
+        ".set pop \n\t"
+        :[th]"=&f"(th), [tl]"=&f"(tl),
+         [mul_hih]"+f"(mul_hih), [mul_hil]"+f"(mul_hil),
+         [mul_loh]"+f"(mul_loh), [mul_lol]"+f"(mul_lol),
+         [accum2h]"+f"(accum2h), [accum2l]"+f"(accum2l),
+         [accum3h]"+f"(accum3h), [accum3l]"+f"(accum3l)
+      );
+    }
+
+    double t;
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      // Shift right for fixed point implementation.
+      _mm_psraw(accum0, accum0, sra)
+      _mm_psraw(accum1, accum1, sra)
+      _mm_psraw(accum2, accum2, sra)
+      _mm_psraw(accum3, accum3, sra)
+      // Packing 32 bits |accum| to 16 bits per channel (signed saturation).
+      // [16] a1 b1 g1 r1 a0 b0 g0 r0
+      _mm_packsswh(accum0, accum0, accum1, t)
+      // [16] a3 b3 g3 r3 a2 b2 g2 r2
+      _mm_packsswh(accum2, accum2, accum3, t)
+      // Packing 16 bits |accum| to 8 bits per channel (unsigned saturation).
+      // [8] a3 b3 g3 r3 a2 b2 g2 r2 a1 b1 g1 r1 a0 b0 g0 r0
+      _mm_packushb(accum0, accum0, accum2, t)
+      ".set pop \n\t"
+      :[accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l),
+       [accum1h]"+f"(accum1h), [accum1l]"+f"(accum1l),
+       [accum2h]"+f"(accum2h), [accum2l]"+f"(accum2l),
+       [accum3h]"+f"(accum3h), [accum3l]"+f"(accum3l),
+       [t]"=&f"(t)
+      :[sra]"f"(sra)
+    );
+
+    if (has_alpha) {
+      double ah, al, bh, bl, srl8, srl16, sll24;
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        "li %[tmp], 8 \n\t"
+        "mtc1 %[tmp], %[srl8] \n\t"
+        "li %[tmp], 16 \n\t"
+        "mtc1 %[tmp], %[srl16] \n\t"
+        "li %[tmp], 24 \n\t"
+        "mtc1 %[tmp], %[sll24] \n\t"
+        // Compute the max(ri, gi, bi) for each pixel.
+        // [8] xx a3 b3 g3 xx a2 b2 g2 xx a1 b1 g1 xx a0 b0 g0
+        _mm_psraw(a, accum0, srl8)
+        // [8] xx xx xx max3 xx xx xx max2 xx xx xx max1 xx xx xx max0
+        _mm_pmaxub(b, a, accum0) // Max of r and g.
+        // [8] xx xx a3 b3 xx xx a2 b2 xx xx a1 b1 xx xx a0 b0
+        _mm_psrlw(a, accum0, srl16)
+        // [8] xx xx xx max3 xx xx xx max2 xx xx xx max1 xx xx xx max0
+        _mm_pmaxub(b, a, b) // Max of r and g and b.
+        // [8] max3 00 00 00 max2 00 00 00 max1 00 00 00 max0 00 00 00
+        _mm_psllw(b, b, sll24)
+        // Make sure the value of alpha channel is always larger than maximum
+        // value of color channels.
+        _mm_pmaxub(accum0, b, accum0)
+        ".set pop \n\t"
+        :[accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l),
+         [tmp]"=&r"(tmp), [ah]"=&f"(ah), [al]"=&f"(al),
+         [bh]"=&f"(bh), [bl]"=&f"(bl), [srl8]"=&f"(srl8),
+         [srl16]"=&f"(srl16), [sll24]"=&f"(sll24)
+      );
+    } else {
+      double maskh, maskl;
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        // Set value of alpha channels to 0xFF.
+        "li %[tmp], 0xff000000 \n\t"
+        "mtc1 %[tmp], %[maskl] \n\t"
+        "punpcklwd %[maskl], %[maskl], %[maskl] \n\t"
+        "mov.d %[maskh], %[maskl] \n\t"
+        _mm_or(accum0, accum0, mask)
+      ".set pop \n\t"
+      :[maskh]"=&f"(maskh), [maskl]"=&f"(maskl),
+       [accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l),
+       [tmp]"=&r"(tmp)
+      );
+    }
+
+    // Store the convolution result (16 bytes) and advance the pixel pointers.
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      "gssdlc1 %[accum0h], 0xf(%[out_row]) \n\t"
+      "gssdrc1 %[accum0h], 0x8(%[out_row]) \n\t"
+      "gssdlc1 %[accum0l], 0x7(%[out_row]) \n\t"
+      "gssdrc1 %[accum0l], 0x0(%[out_row]) \n\t"
+      ".set pop \n\t"
+      ::[accum0h]"f"(accum0h), [accum0l]"f"(accum0l),
+        [out_row]"r"(out_row)
+      :"memory"
+    );
+    out_row += 16;
+  }
+
+  // When the width of the output is not divisible by 4, We need to save one
+  // pixel (4 bytes) each time. And also the fourth pixel is always absent.
+  if (pixel_width & 3) {
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      _mm_xor(accum0, accum0, accum0)
+      _mm_xor(accum1, accum1, accum1)
+      _mm_xor(accum2, accum2, accum2)
+      ".set pop \n\t"
+      :[accum0h]"=&f"(accum0h), [accum0l]"=&f"(accum0l),
+       [accum1h]"=&f"(accum1h), [accum1l]"=&f"(accum1l),
+       [accum2h]"=&f"(accum2h), [accum2l]"=&f"(accum2l)
+    );
+    for (int filter_y = 0; filter_y < filter_length; ++filter_y) {
+      double src8h, src8l, src16h, src16l;
+      double th, tl, mul_hih, mul_hil, mul_loh, mul_lol;
+      src = reinterpret_cast<const void*>(
+          &source_data_rows[filter_y][out_x<<2]);
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        "gsldlc1 %[coeff16l], 7+%[fval] \n\t"
+        "gsldrc1 %[coeff16l], %[fval] \n\t"
+        "pshufh %[coeff16l], %[coeff16l], %[zerol] \n\t"
+        "mov.d %[coeff16h], %[coeff16l] \n\t"
+        // [8] a3 b3 g3 r3 a2 b2 g2 r2 a1 b1 g1 r1 a0 b0 g0 r0
+        "gsldlc1 %[src8h], 0xf(%[src]) \n\t"
+        "gsldrc1 %[src8h], 0x8(%[src]) \n\t"
+        "gsldlc1 %[src8l], 0x7(%[src]) \n\t"
+        "gsldrc1 %[src8l], 0x0(%[src]) \n\t"
+        // [16] a1 b1 g1 r1 a0 b0 g0 r0
+        _mm_punpcklbh(src16, src8, zero)
+        _mm_pmulhh(mul_hi, src16, coeff16)
+        _mm_pmullh(mul_lo, src16, coeff16)
+        // [32] a0 b0 g0 r0
+        _mm_punpcklhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum0, accum0, t)
+        // [32] a1 b1 g1 r1
+        _mm_punpckhhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum1, accum1, t)
+        // [16] a3 b3 g3 r3 a2 b2 g2 r2
+        _mm_punpckhbh(src16, src8, zero)
+        _mm_pmulhh(mul_hi, src16, coeff16)
+        _mm_pmullh(mul_lo, src16, coeff16)
+        // [32] a2 b2 g2 r2
+        _mm_punpcklhw(t, mul_lo, mul_hi)
+        _mm_paddw(accum2, accum2, t)
+        ".set pop \n\t"
+        :[th]"=&f"(th), [tl]"=&f"(tl),
+         [src8h]"=&f"(src8h), [src8l]"=&f"(src8l),
+         [src16h]"=&f"(src16h), [src16l]"=&f"(src16l),
+         [mul_hih]"=&f"(mul_hih), [mul_hil]"=&f"(mul_hil),
+         [mul_loh]"=&f"(mul_loh), [mul_lol]"=&f"(mul_lol),
+         [accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l),
+         [accum1h]"+f"(accum1h), [accum1l]"+f"(accum1l),
+         [accum2h]"+f"(accum2h), [accum2l]"+f"(accum2l),
+         [coeff16h]"=&f"(coeff16h), [coeff16l]"=&f"(coeff16l)
+        :[zeroh]"f"(zero), [zerol]"f"(zero),
+         [fval]"m"(filter_values[filter_y]),
+         [src]"r"(src)
+      );
+    }
+
+    double t;
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      _mm_psraw(accum0, accum0, sra)
+      _mm_psraw(accum1, accum1, sra)
+      _mm_psraw(accum2, accum2, sra)
+      // [16] a1 b1 g1 r1 a0 b0 g0 r0
+      _mm_packsswh(accum0, accum0, accum1, t)
+      // [16] a3 b3 g3 r3 a2 b2 g2 r2
+      _mm_packsswh(accum2, accum2, zero, t)
+      // [8] a3 b3 g3 r3 a2 b2 g2 r2 a1 b1 g1 r1 a0 b0 g0 r0
+      _mm_packushb(accum0, accum0, accum2, t)
+      ".set pop \n\t"
+      :[accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l),
+       [accum1h]"+f"(accum1h), [accum1l]"+f"(accum1l),
+       [accum2h]"+f"(accum2h), [accum2l]"+f"(accum2l),
+       [t]"=&f"(t)
+      :[zeroh]"f"(zero), [zerol]"f"(zero), [sra]"f"(sra)
+    );
+    if (has_alpha) {
+      double ah, al, bh, bl, srl8, srl16, sll24;
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        "li %[tmp], 8 \n\t"
+        "mtc1 %[tmp], %[srl8] \n\t"
+        "li %[tmp], 16 \n\t"
+        "mtc1 %[tmp], %[srl16] \n\t"
+        "li %[tmp], 24 \n\t"
+        "mtc1 %[tmp], %[sll24] \n\t"
+        // [8] xx a3 b3 g3 xx a2 b2 g2 xx a1 b1 g1 xx a0 b0 g0
+        _mm_psrlw(a, accum0, srl8)
+        // [8] xx xx xx max3 xx xx xx max2 xx xx xx max1 xx xx xx max0
+        _mm_pmaxub(b, a, accum0) // Max of r and g.
+        // [8] xx xx a3 b3 xx xx a2 b2 xx xx a1 b1 xx xx a0 b0
+        _mm_psrlw(a, accum0, srl16)
+        // [8] xx xx xx max3 xx xx xx max2 xx xx xx max1 xx xx xx max0
+        _mm_pmaxub(b, a, b) // Max of r and g and b.
+        // [8] max3 00 00 00 max2 00 00 00 max1 00 00 00 max0 00 00 00
+        _mm_psllw(b, b, sll24)
+        _mm_pmaxub(accum0, b, accum0)
+        ".set pop \n\t"
+        :[ah]"=&f"(ah), [al]"=&f"(al), [bh]"=&f"(bh), [bl]"=&f"(bl),
+         [accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l), [tmp]"=&r"(tmp),
+         [srl8]"=&f"(srl8), [srl16]"=&f"(srl16), [sll24]"=&f"(sll24)
+      );
+    } else {
+      double maskh, maskl;
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        // Set value of alpha channels to 0xFF.
+        "li %[tmp], 0xff000000 \n\t"
+        "mtc1 %[tmp], %[maskl] \n\t"
+        "punpcklwd %[maskl], %[maskl], %[maskl] \n\t"
+        "mov.d %[maskh], %[maskl] \n\t"
+        _mm_or(accum0, accum0, mask)
+        ".set pop \n\t"
+        :[maskh]"=&f"(maskh), [maskl]"=&f"(maskl),
+         [accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l),
+         [tmp]"=&r"(tmp)
+      );
+    }
+
+    double s4, s64;
+    asm volatile (
+      ".set push \n\t"
+      ".set arch=loongson3a \n\t"
+      "li %[tmp], 4 \n\t"
+      "mtc1 %[tmp], %[s4] \n\t"
+      "li %[tmp], 64 \n\t"
+      "mtc1 %[tmp], %[s64] \n\t"
+      ".set pop \n\t"
+      :[s4]"=f"(s4), [s64]"=f"(s64),
+       [tmp]"=&r"(tmp)
+    );
+    for (int out_x = width; out_x < pixel_width; out_x++) {
+      double t;
+
+      asm volatile (
+        ".set push \n\t"
+        ".set arch=loongson3a \n\t"
+        "swc1 %[accum0l], (%[out_row]) \n\t"
+        _mm_psrlq(accum0, accum0, s4, s64, t)
+        ".set pop \n\t"
+        :[t]"=&f"(t),
+         [accum0h]"+f"(accum0h), [accum0l]"+f"(accum0l)
+        :[out_row]"r"(out_row), [s4]"f"(s4), [s64]"f"(s64)
+        :"memory"
+      );
+      out_row += 4;
+    }
+  }
+}
+
+void ConvolveVertically_LS3(const ConvolutionFilter1D::Fixed* filter_values,
+                             int filter_length,
+                             unsigned char* const* source_data_rows,
+                             int pixel_width,
+                             unsigned char* out_row, bool has_alpha) {
+  if (has_alpha) {
+    ConvolveVertically_LS3_impl<true>(filter_values, filter_length,
+                                       source_data_rows, pixel_width, out_row);
+  } else {
+    ConvolveVertically_LS3_impl<false>(filter_values, filter_length,
+                                       source_data_rows, pixel_width, out_row);
+  }
+}
+
+}  // namespace skia
+
+#endif /* _MIPS_ARCH_LOONGSON3A */