libvpx: Pull from upstream

source/libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_ssse3.c

 /*
  *  Copyright (c) 2010 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.
  */
 
 // Due to a header conflict between math.h and intrinsics includes with ceil()
 // in certain configurations under vs9 this include needs to precede
 // tmmintrin.h.
 
 #include <tmmintrin.h>
 
 #include "./vpx_dsp_rtcd.h"
+#include "vpx_dsp/vpx_filter.h"
 #include "vpx_dsp/x86/convolve.h"
+#include "vpx_mem/vpx_mem.h"
 #include "vpx_ports/mem.h"
 #include "vpx_ports/emmintrin_compat.h"
 
 // filters only for the 4_h8 convolution
 DECLARE_ALIGNED(16, static const uint8_t, filt1_4_h8[16]) = {
   0, 1, 1, 2, 2, 3, 3, 4, 2, 3, 3, 4, 4, 5, 5, 6
 };
 
 DECLARE_ALIGNED(16, static const uint8_t, filt2_4_h8[16]) = {
   4, 5, 5, 6, 6, 7, 7, 8, 6, 7, 7, 8, 8, 9, 9, 10
@@ skipping 165 matching lines @@
 
     src_ptr+=src_pixels_per_line;
 
     // save only 8 bytes
     _mm_storel_epi64((__m128i*)&output_ptr[0], srcRegFilt1);
 
     output_ptr+=output_pitch;
   }
 }
 
+#if ARCH_X86_64
 static void vpx_filter_block1d16_h8_intrin_ssse3(const uint8_t *src_ptr,
                                                  ptrdiff_t src_pixels_per_line,
                                                  uint8_t *output_ptr,
                                                  ptrdiff_t output_pitch,
                                                  uint32_t output_height,
                                                  const int16_t *filter) {
   __m128i addFilterReg64, filtersReg, srcReg1, srcReg2;
   __m128i filt1Reg, filt2Reg, filt3Reg, filt4Reg;
   __m128i firstFilters, secondFilters, thirdFilters, forthFilters;
   __m128i srcRegFilt1_1, srcRegFilt2_1, srcRegFilt2, srcRegFilt3;
@@ skipping 96 matching lines @@
     srcRegFilt1_1 = _mm_packus_epi16(srcRegFilt1_1, srcRegFilt2_1);
 
     src_ptr+=src_pixels_per_line;
 
     // save 16 bytes
     _mm_store_si128((__m128i*)output_ptr, srcRegFilt1_1);
 
     output_ptr+=output_pitch;
   }
 }
+#endif  // ARCH_X86_64
 
 void vpx_filter_block1d8_v8_intrin_ssse3(const uint8_t *src_ptr,
                                          ptrdiff_t src_pitch,
                                          uint8_t *output_ptr,
                                          ptrdiff_t out_pitch,
                                          uint32_t output_height,
                                          const int16_t *filter) {
   __m128i addFilterReg64, filtersReg, minReg;
   __m128i firstFilters, secondFilters, thirdFilters, forthFilters;
   __m128i srcRegFilt1, srcRegFilt2, srcRegFilt3, srcRegFilt5;
@@ skipping 69 matching lines @@
     srcReg6 = srcReg7;
     srcReg7 = srcReg8;
 
     // save only 8 bytes convolve result
     _mm_storel_epi64((__m128i*)&output_ptr[0], srcRegFilt1);
 
     output_ptr+=out_pitch;
   }
 }
 
+#if ARCH_X86_64
 static void vpx_filter_block1d16_v8_intrin_ssse3(const uint8_t *src_ptr,
                                                  ptrdiff_t src_pitch,
                                                  uint8_t *output_ptr,
                                                  ptrdiff_t out_pitch,
                                                  uint32_t output_height,
                                                  const int16_t *filter) {
   __m128i addFilterReg64, filtersReg, srcRegFilt1, srcRegFilt3;
   __m128i firstFilters, secondFilters, thirdFilters, forthFilters;
   __m128i srcRegFilt5, srcRegFilt6, srcRegFilt7, srcRegFilt8;
   __m128i srcReg1, srcReg2, srcReg3, srcReg4, srcReg5, srcReg6, srcReg7;
@@ skipping 94 matching lines @@
     srcReg5 = srcReg6;
     srcReg6 = srcReg7;
     srcReg7 = srcReg8;
 
     // save 16 bytes convolve result
     _mm_store_si128((__m128i*)output_ptr, srcRegFilt1);
 
     output_ptr+=out_pitch;
   }
 }
+#endif  // ARCH_X86_64
 
 #if ARCH_X86_64
 filter8_1dfunction vpx_filter_block1d16_v8_intrin_ssse3;
 filter8_1dfunction vpx_filter_block1d16_h8_intrin_ssse3;
 filter8_1dfunction vpx_filter_block1d8_v8_intrin_ssse3;
 filter8_1dfunction vpx_filter_block1d8_h8_intrin_ssse3;
 filter8_1dfunction vpx_filter_block1d4_v8_ssse3;
 filter8_1dfunction vpx_filter_block1d4_h8_intrin_ssse3;
 #define vpx_filter_block1d16_v8_ssse3 vpx_filter_block1d16_v8_intrin_ssse3
 #define vpx_filter_block1d16_h8_ssse3 vpx_filter_block1d16_h8_intrin_ssse3
@@ skipping 47 matching lines @@
 //                                   uint8_t *dst, ptrdiff_t dst_stride,
 //                                   const int16_t *filter_x, int x_step_q4,
 //                                   const int16_t *filter_y, int y_step_q4,
 //                                   int w, int h);
 FUN_CONV_1D(horiz, x_step_q4, filter_x, h, src, , ssse3);
 FUN_CONV_1D(vert, y_step_q4, filter_y, v, src - src_stride * 3, , ssse3);
 FUN_CONV_1D(avg_horiz, x_step_q4, filter_x, h, src, avg_, ssse3);
 FUN_CONV_1D(avg_vert, y_step_q4, filter_y, v, src - src_stride * 3, avg_,
             ssse3);
 
-// void vpx_convolve8_ssse3(const uint8_t *src, ptrdiff_t src_stride,
+#define TRANSPOSE_8X8(in0, in1, in2, in3, in4, in5, in6, in7,           \
+                      out0, out1, out2, out3, out4, out5, out6, out7) { \
+  const __m128i tr0_0 = _mm_unpacklo_epi8(in0, in1);                    \
+  const __m128i tr0_1 = _mm_unpacklo_epi8(in2, in3);                    \
+  const __m128i tr0_2 = _mm_unpacklo_epi8(in4, in5);                    \
+  const __m128i tr0_3 = _mm_unpacklo_epi8(in6, in7);                    \
+                                                                        \
+  const __m128i tr1_0 = _mm_unpacklo_epi16(tr0_0, tr0_1);               \
+  const __m128i tr1_1 = _mm_unpackhi_epi16(tr0_0, tr0_1);               \
+  const __m128i tr1_2 = _mm_unpacklo_epi16(tr0_2, tr0_3);               \
+  const __m128i tr1_3 = _mm_unpackhi_epi16(tr0_2, tr0_3);               \
+                                                                        \
+  const __m128i tr2_0 = _mm_unpacklo_epi32(tr1_0, tr1_2);               \
+  const __m128i tr2_1 = _mm_unpackhi_epi32(tr1_0, tr1_2);               \
+  const __m128i tr2_2 = _mm_unpacklo_epi32(tr1_1, tr1_3);               \
+  const __m128i tr2_3 = _mm_unpackhi_epi32(tr1_1, tr1_3);               \
+                                                                        \
+  out0 = _mm_unpacklo_epi64(tr2_0, tr2_0);                              \
+  out1 = _mm_unpackhi_epi64(tr2_0, tr2_0);                              \
+  out2 = _mm_unpacklo_epi64(tr2_1, tr2_1);                              \
+  out3 = _mm_unpackhi_epi64(tr2_1, tr2_1);                              \
+  out4 = _mm_unpacklo_epi64(tr2_2, tr2_2);                              \
+  out5 = _mm_unpackhi_epi64(tr2_2, tr2_2);                              \
+  out6 = _mm_unpacklo_epi64(tr2_3, tr2_3);                              \
+  out7 = _mm_unpackhi_epi64(tr2_3, tr2_3);                              \
+}
+
+static void filter_horiz_w8_ssse3(const uint8_t *src_x, ptrdiff_t src_pitch,
+                                  uint8_t *dst, const int16_t *x_filter) {
+  const __m128i k_256 = _mm_set1_epi16(1 << 8);
+  const __m128i f_values = _mm_load_si128((const __m128i *)x_filter);
+  // pack and duplicate the filter values
+  const __m128i f1f0 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
+  const __m128i f3f2 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
+  const __m128i f5f4 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
+  const __m128i f7f6 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
+  const __m128i A = _mm_loadl_epi64((const __m128i *)src_x);
+  const __m128i B = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch));
+  const __m128i C = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 2));
+  const __m128i D = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 3));
+  const __m128i E = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 4));
+  const __m128i F = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 5));
+  const __m128i G = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 6));
+  const __m128i H = _mm_loadl_epi64((const __m128i *)(src_x + src_pitch * 7));
+  // 00 01 10 11 02 03 12 13 04 05 14 15 06 07 16 17
+  const __m128i tr0_0 = _mm_unpacklo_epi16(A, B);
+  // 20 21 30 31 22 23 32 33 24 25 34 35 26 27 36 37
+  const __m128i tr0_1 = _mm_unpacklo_epi16(C, D);
+  // 40 41 50 51 42 43 52 53 44 45 54 55 46 47 56 57
+  const __m128i tr0_2 = _mm_unpacklo_epi16(E, F);
+  // 60 61 70 71 62 63 72 73 64 65 74 75 66 67 76 77
+  const __m128i tr0_3 = _mm_unpacklo_epi16(G, H);
+  // 00 01 10 11 20 21 30 31 02 03 12 13 22 23 32 33
+  const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
+  // 04 05 14 15 24 25 34 35 06 07 16 17 26 27 36 37
+  const __m128i tr1_1 = _mm_unpackhi_epi32(tr0_0, tr0_1);
+  // 40 41 50 51 60 61 70 71 42 43 52 53 62 63 72 73
+  const __m128i tr1_2 = _mm_unpacklo_epi32(tr0_2, tr0_3);
+  // 44 45 54 55 64 65 74 75 46 47 56 57 66 67 76 77
+  const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);
+  // 00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71
+  const __m128i s1s0 = _mm_unpacklo_epi64(tr1_0, tr1_2);
+  const __m128i s3s2 = _mm_unpackhi_epi64(tr1_0, tr1_2);
+  const __m128i s5s4 = _mm_unpacklo_epi64(tr1_1, tr1_3);
+  const __m128i s7s6 = _mm_unpackhi_epi64(tr1_1, tr1_3);
+  // multiply 2 adjacent elements with the filter and add the result
+  const __m128i x0 = _mm_maddubs_epi16(s1s0, f1f0);
+  const __m128i x1 = _mm_maddubs_epi16(s3s2, f3f2);
+  const __m128i x2 = _mm_maddubs_epi16(s5s4, f5f4);
+  const __m128i x3 = _mm_maddubs_epi16(s7s6, f7f6);
+  // add and saturate the results together
+  const __m128i min_x2x1 = _mm_min_epi16(x2, x1);
+  const __m128i max_x2x1 = _mm_max_epi16(x2, x1);
+  __m128i temp = _mm_adds_epi16(x0, x3);
+  temp = _mm_adds_epi16(temp, min_x2x1);
+  temp = _mm_adds_epi16(temp, max_x2x1);
+  // round and shift by 7 bit each 16 bit
+  temp = _mm_mulhrs_epi16(temp, k_256);
+  // shrink to 8 bit each 16 bits
+  temp = _mm_packus_epi16(temp, temp);
+  // save only 8 bytes convolve result
+  _mm_storel_epi64((__m128i*)dst, temp);
+}
+
+static void transpose8x8_to_dst(const uint8_t *src, ptrdiff_t src_stride,
+                                uint8_t *dst, ptrdiff_t dst_stride) {
+  __m128i A, B, C, D, E, F, G, H;
+
+  A = _mm_loadl_epi64((const __m128i *)src);
+  B = _mm_loadl_epi64((const __m128i *)(src + src_stride));
+  C = _mm_loadl_epi64((const __m128i *)(src + src_stride * 2));
+  D = _mm_loadl_epi64((const __m128i *)(src + src_stride * 3));
+  E = _mm_loadl_epi64((const __m128i *)(src + src_stride * 4));
+  F = _mm_loadl_epi64((const __m128i *)(src + src_stride * 5));
+  G = _mm_loadl_epi64((const __m128i *)(src + src_stride * 6));
+  H = _mm_loadl_epi64((const __m128i *)(src + src_stride * 7));
+
+  TRANSPOSE_8X8(A, B, C, D, E, F, G, H,
+                A, B, C, D, E, F, G, H);
+
+  _mm_storel_epi64((__m128i*)dst, A);
+  _mm_storel_epi64((__m128i*)(dst + dst_stride * 1), B);
+  _mm_storel_epi64((__m128i*)(dst + dst_stride * 2), C);
+  _mm_storel_epi64((__m128i*)(dst + dst_stride * 3), D);
+  _mm_storel_epi64((__m128i*)(dst + dst_stride * 4), E);
+  _mm_storel_epi64((__m128i*)(dst + dst_stride * 5), F);
+  _mm_storel_epi64((__m128i*)(dst + dst_stride * 6), G);
+  _mm_storel_epi64((__m128i*)(dst + dst_stride * 7), H);
+}
+
+static void scaledconvolve_horiz_w8(const uint8_t *src, ptrdiff_t src_stride,
+                                    uint8_t *dst, ptrdiff_t dst_stride,
+                                    const InterpKernel *x_filters,
+                                    int x0_q4, int x_step_q4, int w, int h) {
+  DECLARE_ALIGNED(16, uint8_t, temp[8 * 8]);
+  int x, y, z;
+  src -= SUBPEL_TAPS / 2 - 1;
+
+  // This function processes 8x8 areas.  The intermediate height is not always
+  // a multiple of 8, so force it to be a multiple of 8 here.
+  y = h + (8 - (h & 0x7));
+
+  do {
+    int x_q4 = x0_q4;
+    for (x = 0; x < w; x += 8) {
+      // process 8 src_x steps
+      for (z = 0; z < 8; ++z) {
+        const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS];
+        const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK];
+        if (x_q4 & SUBPEL_MASK) {
+          filter_horiz_w8_ssse3(src_x, src_stride, temp + (z * 8), x_filter);
+        } else {
+          int i;
+          for (i = 0; i < 8; ++i) {
+            temp[z * 8 + i] = src_x[i * src_stride + 3];
+          }
+        }
+        x_q4 += x_step_q4;
+      }
+
+      // transpose the 8x8 filters values back to dst
+      transpose8x8_to_dst(temp, 8, dst + x, dst_stride);
+    }
+
+    src += src_stride * 8;
+    dst += dst_stride * 8;
+  } while (y -= 8);
+}
+
+static void filter_horiz_w4_ssse3(const uint8_t *src_ptr, ptrdiff_t src_pitch,
+                                  uint8_t *dst, const int16_t *filter) {
+  const __m128i k_256 = _mm_set1_epi16(1 << 8);
+  const __m128i f_values = _mm_load_si128((const __m128i *)filter);
+  // pack and duplicate the filter values
+  const __m128i f1f0 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
+  const __m128i f3f2 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
+  const __m128i f5f4 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
+  const __m128i f7f6 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
+  const __m128i A = _mm_loadl_epi64((const __m128i *)src_ptr);
+  const __m128i B = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch));
+  const __m128i C = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 2));
+  const __m128i D = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 3));
+  // TRANSPOSE...
+  // 00 01 02 03 04 05 06 07
+  // 10 11 12 13 14 15 16 17
+  // 20 21 22 23 24 25 26 27
+  // 30 31 32 33 34 35 36 37
+  //
+  // TO
+  //
+  // 00 10 20 30
+  // 01 11 21 31
+  // 02 12 22 32
+  // 03 13 23 33
+  // 04 14 24 34
+  // 05 15 25 35
+  // 06 16 26 36
+  // 07 17 27 37
+  //
+  // 00 01 10 11 02 03 12 13 04 05 14 15 06 07 16 17
+  const __m128i tr0_0 = _mm_unpacklo_epi16(A, B);
+  // 20 21 30 31 22 23 32 33 24 25 34 35 26 27 36 37
+  const __m128i tr0_1 = _mm_unpacklo_epi16(C, D);
+  // 00 01 10 11 20 21 30 31 02 03 12 13 22 23 32 33
+  const __m128i s1s0  = _mm_unpacklo_epi32(tr0_0, tr0_1);
+  // 04 05 14 15 24 25 34 35 06 07 16 17 26 27 36 37
+  const __m128i s5s4 = _mm_unpackhi_epi32(tr0_0, tr0_1);
+  // 02 03 12 13 22 23 32 33
+  const __m128i s3s2 = _mm_srli_si128(s1s0, 8);
+  // 06 07 16 17 26 27 36 37
+  const __m128i s7s6 = _mm_srli_si128(s5s4, 8);
+  // multiply 2 adjacent elements with the filter and add the result
+  const __m128i x0 = _mm_maddubs_epi16(s1s0, f1f0);
+  const __m128i x1 = _mm_maddubs_epi16(s3s2, f3f2);
+  const __m128i x2 = _mm_maddubs_epi16(s5s4, f5f4);
+  const __m128i x3 = _mm_maddubs_epi16(s7s6, f7f6);
+  // add and saturate the results together
+  const __m128i min_x2x1 = _mm_min_epi16(x2, x1);
+  const __m128i max_x2x1 = _mm_max_epi16(x2, x1);
+  __m128i temp = _mm_adds_epi16(x0, x3);
+  temp = _mm_adds_epi16(temp, min_x2x1);
+  temp = _mm_adds_epi16(temp, max_x2x1);
+  // round and shift by 7 bit each 16 bit
+  temp = _mm_mulhrs_epi16(temp, k_256);
+  // shrink to 8 bit each 16 bits
+  temp = _mm_packus_epi16(temp, temp);
+  // save only 4 bytes
+  *(int *)dst = _mm_cvtsi128_si32(temp);
+}
+
+static void transpose4x4_to_dst(const uint8_t *src, ptrdiff_t src_stride,
+                                uint8_t *dst, ptrdiff_t dst_stride) {
+  __m128i A = _mm_cvtsi32_si128(*(const int *)src);
+  __m128i B = _mm_cvtsi32_si128(*(const int *)(src + src_stride));
+  __m128i C = _mm_cvtsi32_si128(*(const int *)(src + src_stride * 2));
+  __m128i D = _mm_cvtsi32_si128(*(const int *)(src + src_stride * 3));
+  // 00 10 01 11 02 12 03 13
+  const __m128i tr0_0 = _mm_unpacklo_epi8(A, B);
+  // 20 30 21 31 22 32 23 33
+  const __m128i tr0_1 = _mm_unpacklo_epi8(C, D);
+  // 00 10 20 30 01 11 21 31 02 12 22 32 03 13 23 33
+  A = _mm_unpacklo_epi16(tr0_0, tr0_1);
+  B = _mm_srli_si128(A, 4);
+  C = _mm_srli_si128(A, 8);
+  D = _mm_srli_si128(A, 12);
+
+  *(int *)(dst) =  _mm_cvtsi128_si32(A);
+  *(int *)(dst + dst_stride) =  _mm_cvtsi128_si32(B);
+  *(int *)(dst + dst_stride * 2) =  _mm_cvtsi128_si32(C);
+  *(int *)(dst + dst_stride * 3) =  _mm_cvtsi128_si32(D);
+}
+
+static void scaledconvolve_horiz_w4(const uint8_t *src, ptrdiff_t src_stride,
+                                    uint8_t *dst, ptrdiff_t dst_stride,
+                                    const InterpKernel *x_filters,
+                                    int x0_q4, int x_step_q4, int w, int h) {
+  DECLARE_ALIGNED(16, uint8_t, temp[4 * 4]);
+  int x, y, z;
+  src -= SUBPEL_TAPS / 2 - 1;
+
+  for (y = 0; y < h; y += 4) {
+    int x_q4 = x0_q4;
+    for (x = 0; x < w; x += 4) {
+      // process 4 src_x steps
+      for (z = 0; z < 4; ++z) {
+        const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS];
+        const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK];
+        if (x_q4 & SUBPEL_MASK) {
+          filter_horiz_w4_ssse3(src_x, src_stride, temp + (z * 4), x_filter);
+        } else {
+          int i;
+          for (i = 0; i < 4; ++i) {
+            temp[z * 4 + i] = src_x[i * src_stride + 3];
+          }
+        }
+        x_q4 += x_step_q4;
+      }
+
+      // transpose the 4x4 filters values back to dst
+      transpose4x4_to_dst(temp, 4, dst + x, dst_stride);
+    }
+
+    src += src_stride * 4;
+    dst += dst_stride * 4;
+  }
+}
+
+static void filter_vert_w4_ssse3(const uint8_t *src_ptr, ptrdiff_t src_pitch,
+                                 uint8_t *dst, const int16_t *filter) {
+  const __m128i k_256 = _mm_set1_epi16(1 << 8);
+  const __m128i f_values = _mm_load_si128((const __m128i *)filter);
+  // pack and duplicate the filter values
+  const __m128i f1f0 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
+  const __m128i f3f2 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
+  const __m128i f5f4 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
+  const __m128i f7f6 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
+  const __m128i A = _mm_cvtsi32_si128(*(const int *)src_ptr);
+  const __m128i B = _mm_cvtsi32_si128(*(const int *)(src_ptr + src_pitch));
+  const __m128i C = _mm_cvtsi32_si128(*(const int *)(src_ptr + src_pitch * 2));
+  const __m128i D = _mm_cvtsi32_si128(*(const int *)(src_ptr + src_pitch * 3));
+  const __m128i E = _mm_cvtsi32_si128(*(const int *)(src_ptr + src_pitch * 4));
+  const __m128i F = _mm_cvtsi32_si128(*(const int *)(src_ptr + src_pitch * 5));
+  const __m128i G = _mm_cvtsi32_si128(*(const int *)(src_ptr + src_pitch * 6));
+  const __m128i H = _mm_cvtsi32_si128(*(const int *)(src_ptr + src_pitch * 7));
+  const __m128i s1s0 = _mm_unpacklo_epi8(A, B);
+  const __m128i s3s2 = _mm_unpacklo_epi8(C, D);
+  const __m128i s5s4 = _mm_unpacklo_epi8(E, F);
+  const __m128i s7s6 = _mm_unpacklo_epi8(G, H);
+  // multiply 2 adjacent elements with the filter and add the result
+  const __m128i x0 = _mm_maddubs_epi16(s1s0, f1f0);
+  const __m128i x1 = _mm_maddubs_epi16(s3s2, f3f2);
+  const __m128i x2 = _mm_maddubs_epi16(s5s4, f5f4);
+  const __m128i x3 = _mm_maddubs_epi16(s7s6, f7f6);
+  // add and saturate the results together
+  const __m128i min_x2x1 = _mm_min_epi16(x2, x1);
+  const __m128i max_x2x1 = _mm_max_epi16(x2, x1);
+  __m128i temp = _mm_adds_epi16(x0, x3);
+  temp = _mm_adds_epi16(temp, min_x2x1);
+  temp = _mm_adds_epi16(temp, max_x2x1);
+  // round and shift by 7 bit each 16 bit
+  temp = _mm_mulhrs_epi16(temp, k_256);
+  // shrink to 8 bit each 16 bits
+  temp = _mm_packus_epi16(temp, temp);
+  // save only 4 bytes
+  *(int *)dst = _mm_cvtsi128_si32(temp);
+}
+
+static void scaledconvolve_vert_w4(const uint8_t *src, ptrdiff_t src_stride,
+                                   uint8_t *dst, ptrdiff_t dst_stride,
+                                   const InterpKernel *y_filters,
+                                   int y0_q4, int y_step_q4, int w, int h) {
+  int y;
+  int y_q4 = y0_q4;
+
+  src -= src_stride * (SUBPEL_TAPS / 2 - 1);
+  for (y = 0; y < h; ++y) {
+    const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride];
+    const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK];
+
+    if (y_q4 & SUBPEL_MASK) {
+      filter_vert_w4_ssse3(src_y, src_stride, &dst[y * dst_stride], y_filter);
+    } else {
+      memcpy(&dst[y * dst_stride], &src_y[3 * src_stride], w);
+    }
+
+    y_q4 += y_step_q4;
+  }
+}
+
+static void filter_vert_w8_ssse3(const uint8_t *src_ptr, ptrdiff_t src_pitch,
+                                 uint8_t *dst, const int16_t *filter) {
+  const __m128i k_256 = _mm_set1_epi16(1 << 8);
+  const __m128i f_values = _mm_load_si128((const __m128i *)filter);
+  // pack and duplicate the filter values
+  const __m128i f1f0 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
+  const __m128i f3f2 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
+  const __m128i f5f4 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
+  const __m128i f7f6 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
+  const __m128i A = _mm_loadl_epi64((const __m128i *)src_ptr);
+  const __m128i B = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch));
+  const __m128i C = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 2));
+  const __m128i D = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 3));
+  const __m128i E = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 4));
+  const __m128i F = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 5));
+  const __m128i G = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 6));
+  const __m128i H = _mm_loadl_epi64((const __m128i *)(src_ptr + src_pitch * 7));
+  const __m128i s1s0 = _mm_unpacklo_epi8(A, B);
+  const __m128i s3s2 = _mm_unpacklo_epi8(C, D);
+  const __m128i s5s4 = _mm_unpacklo_epi8(E, F);
+  const __m128i s7s6 = _mm_unpacklo_epi8(G, H);
+  // multiply 2 adjacent elements with the filter and add the result
+  const __m128i x0 = _mm_maddubs_epi16(s1s0, f1f0);
+  const __m128i x1 = _mm_maddubs_epi16(s3s2, f3f2);
+  const __m128i x2 = _mm_maddubs_epi16(s5s4, f5f4);
+  const __m128i x3 = _mm_maddubs_epi16(s7s6, f7f6);
+  // add and saturate the results together
+  const __m128i min_x2x1 = _mm_min_epi16(x2, x1);
+  const __m128i max_x2x1 = _mm_max_epi16(x2, x1);
+  __m128i temp = _mm_adds_epi16(x0, x3);
+  temp = _mm_adds_epi16(temp, min_x2x1);
+  temp = _mm_adds_epi16(temp, max_x2x1);
+  // round and shift by 7 bit each 16 bit
+  temp = _mm_mulhrs_epi16(temp, k_256);
+  // shrink to 8 bit each 16 bits
+  temp = _mm_packus_epi16(temp, temp);
+  // save only 8 bytes convolve result
+  _mm_storel_epi64((__m128i*)dst, temp);
+}
+
+static void scaledconvolve_vert_w8(const uint8_t *src, ptrdiff_t src_stride,
+                                   uint8_t *dst, ptrdiff_t dst_stride,
+                                   const InterpKernel *y_filters,
+                                   int y0_q4, int y_step_q4, int w, int h) {
+  int y;
+  int y_q4 = y0_q4;
+
+  src -= src_stride * (SUBPEL_TAPS / 2 - 1);
+  for (y = 0; y < h; ++y) {
+    const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride];
+    const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK];
+    if (y_q4 & SUBPEL_MASK) {
+      filter_vert_w8_ssse3(src_y, src_stride, &dst[y * dst_stride], y_filter);
+    } else {
+      memcpy(&dst[y * dst_stride], &src_y[3 * src_stride], w);
+    }
+    y_q4 += y_step_q4;
+  }
+}
+
+static void filter_vert_w16_ssse3(const uint8_t *src_ptr, ptrdiff_t src_pitch,
+                                  uint8_t *dst, const int16_t *filter, int w) {
+  const __m128i k_256 = _mm_set1_epi16(1 << 8);
+  const __m128i f_values = _mm_load_si128((const __m128i *)filter);
+  // pack and duplicate the filter values
+  const __m128i f1f0 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0200u));
+  const __m128i f3f2 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0604u));
+  const __m128i f5f4 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0a08u));
+  const __m128i f7f6 = _mm_shuffle_epi8(f_values, _mm_set1_epi16(0x0e0cu));
+  int i;
+
+  for (i = 0; i < w; i += 16) {
+    const __m128i A = _mm_loadu_si128((const __m128i *)src_ptr);
+    const __m128i B = _mm_loadu_si128((const __m128i *)(src_ptr + src_pitch));
+    const __m128i C =
+        _mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 2));
+    const __m128i D =
+        _mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 3));
+    const __m128i E =
+        _mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 4));
+    const __m128i F =
+        _mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 5));
+    const __m128i G =
+        _mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 6));
+    const __m128i H =
+        _mm_loadu_si128((const __m128i *)(src_ptr + src_pitch * 7));
+    // merge the result together
+    const __m128i s1s0_lo = _mm_unpacklo_epi8(A, B);
+    const __m128i s7s6_lo = _mm_unpacklo_epi8(G, H);
+    const __m128i s1s0_hi = _mm_unpackhi_epi8(A, B);
+    const __m128i s7s6_hi = _mm_unpackhi_epi8(G, H);
+    // multiply 2 adjacent elements with the filter and add the result
+    const __m128i x0_lo = _mm_maddubs_epi16(s1s0_lo, f1f0);
+    const __m128i x3_lo = _mm_maddubs_epi16(s7s6_lo, f7f6);
+    const __m128i x0_hi = _mm_maddubs_epi16(s1s0_hi, f1f0);
+    const __m128i x3_hi = _mm_maddubs_epi16(s7s6_hi, f7f6);
+    // add and saturate the results together
+    const __m128i x3x0_lo = _mm_adds_epi16(x0_lo, x3_lo);
+    const __m128i x3x0_hi = _mm_adds_epi16(x0_hi, x3_hi);
+    // merge the result together
+    const __m128i s3s2_lo = _mm_unpacklo_epi8(C, D);
+    const __m128i s3s2_hi = _mm_unpackhi_epi8(C, D);
+    // multiply 2 adjacent elements with the filter and add the result
+    const __m128i x1_lo = _mm_maddubs_epi16(s3s2_lo, f3f2);
+    const __m128i x1_hi = _mm_maddubs_epi16(s3s2_hi, f3f2);
+    // merge the result together
+    const __m128i s5s4_lo = _mm_unpacklo_epi8(E, F);
+    const __m128i s5s4_hi = _mm_unpackhi_epi8(E, F);
+    // multiply 2 adjacent elements with the filter and add the result
+    const __m128i x2_lo = _mm_maddubs_epi16(s5s4_lo, f5f4);
+    const __m128i x2_hi = _mm_maddubs_epi16(s5s4_hi, f5f4);
+    // add and saturate the results together
+    __m128i temp_lo = _mm_adds_epi16(x3x0_lo, _mm_min_epi16(x1_lo, x2_lo));
+    __m128i temp_hi = _mm_adds_epi16(x3x0_hi, _mm_min_epi16(x1_hi, x2_hi));
+
+    // add and saturate the results together
+    temp_lo = _mm_adds_epi16(temp_lo, _mm_max_epi16(x1_lo, x2_lo));
+    temp_hi = _mm_adds_epi16(temp_hi, _mm_max_epi16(x1_hi, x2_hi));
+    // round and shift by 7 bit each 16 bit
+    temp_lo = _mm_mulhrs_epi16(temp_lo, k_256);
+    temp_hi = _mm_mulhrs_epi16(temp_hi, k_256);
+    // shrink to 8 bit each 16 bits, the first lane contain the first
+    // convolve result and the second lane contain the second convolve
+    // result
+    temp_hi = _mm_packus_epi16(temp_lo, temp_hi);
+    src_ptr += 16;
+     // save 16 bytes convolve result
+    _mm_store_si128((__m128i*)&dst[i], temp_hi);
+  }
+}
+
+static void scaledconvolve_vert_w16(const uint8_t *src, ptrdiff_t src_stride,
+                                    uint8_t *dst, ptrdiff_t dst_stride,
+                                    const InterpKernel *y_filters,
+                                    int y0_q4, int y_step_q4, int w, int h) {
+  int y;
+  int y_q4 = y0_q4;
+
+  src -= src_stride * (SUBPEL_TAPS / 2 - 1);
+  for (y = 0; y < h; ++y) {
+    const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride];
+    const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK];
+    if (y_q4 & SUBPEL_MASK) {
+      filter_vert_w16_ssse3(src_y, src_stride, &dst[y * dst_stride], y_filter,
+                            w);
+    } else {
+      memcpy(&dst[y * dst_stride], &src_y[3 * src_stride], w);
+    }
+    y_q4 += y_step_q4;
+  }
+}
+
+static void scaledconvolve2d(const uint8_t *src, ptrdiff_t src_stride,
+                             uint8_t *dst, ptrdiff_t dst_stride,
+                             const InterpKernel *const x_filters,
+                             int x0_q4, int x_step_q4,
+                             const InterpKernel *const y_filters,
+                             int y0_q4, int y_step_q4,
+                             int w, int h) {
+  // Note: Fixed size intermediate buffer, temp, places limits on parameters.
+  // 2d filtering proceeds in 2 steps:
+  //   (1) Interpolate horizontally into an intermediate buffer, temp.
+  //   (2) Interpolate temp vertically to derive the sub-pixel result.
+  // Deriving the maximum number of rows in the temp buffer (135):
+  // --Smallest scaling factor is x1/2 ==> y_step_q4 = 32 (Normative).
+  // --Largest block size is 64x64 pixels.
+  // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the
+  //   original frame (in 1/16th pixel units).
+  // --Must round-up because block may be located at sub-pixel position.
+  // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails.
+  // --((64 - 1) * 32 + 15) >> 4 + 8 = 135.
+  // --Require an additional 8 rows for the horiz_w8 transpose tail.
+  DECLARE_ALIGNED(16, uint8_t, temp[(135 + 8) * 64]);
+  const int intermediate_height =
+      (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS;
+
+  assert(w <= 64);
+  assert(h <= 64);
+  assert(y_step_q4 <= 32);
+  assert(x_step_q4 <= 32);
+
+  if (w >= 8) {
+    scaledconvolve_horiz_w8(src - src_stride * (SUBPEL_TAPS / 2 - 1),
+                            src_stride, temp, 64, x_filters, x0_q4, x_step_q4,
+                            w, intermediate_height);
+  } else {
+    scaledconvolve_horiz_w4(src - src_stride * (SUBPEL_TAPS / 2 - 1),
+                            src_stride, temp, 64, x_filters, x0_q4, x_step_q4,
+                            w, intermediate_height);
+  }
+
+  if (w >= 16) {
+    scaledconvolve_vert_w16(temp + 64 * (SUBPEL_TAPS / 2 - 1), 64, dst,
+                            dst_stride, y_filters, y0_q4, y_step_q4, w, h);
+  } else if (w == 8) {
+    scaledconvolve_vert_w8(temp + 64 * (SUBPEL_TAPS / 2 - 1), 64, dst,
+                           dst_stride, y_filters, y0_q4, y_step_q4, w, h);
+  } else {
+    scaledconvolve_vert_w4(temp + 64 * (SUBPEL_TAPS / 2 - 1), 64, dst,
+                           dst_stride, y_filters, y0_q4, y_step_q4, w, h);
+  }
+}
+
+static const InterpKernel *get_filter_base(const int16_t *filter) {
+  // NOTE: This assumes that the filter table is 256-byte aligned.
+  // TODO(agrange) Modify to make independent of table alignment.
+  return (const InterpKernel *)(((intptr_t)filter) & ~((intptr_t)0xFF));
+}
+
+static int get_filter_offset(const int16_t *f, const InterpKernel *base) {
+  return (int)((const InterpKernel *)(intptr_t)f - base);
+}
+
+void vpx_scaled_2d_ssse3(const uint8_t *src, ptrdiff_t src_stride,
+                         uint8_t *dst, ptrdiff_t dst_stride,
+                         const int16_t *filter_x, int x_step_q4,
+                         const int16_t *filter_y, int y_step_q4,
+                         int w, int h) {
+  const InterpKernel *const filters_x = get_filter_base(filter_x);
+  const int x0_q4 = get_filter_offset(filter_x, filters_x);
+
+  const InterpKernel *const filters_y = get_filter_base(filter_y);
+  const int y0_q4 = get_filter_offset(filter_y, filters_y);
+
+  scaledconvolve2d(src, src_stride, dst, dst_stride,
+                   filters_x, x0_q4, x_step_q4,
+                   filters_y, y0_q4, y_step_q4, w, h);
+}
+
+// void vp9_convolve8_ssse3(const uint8_t *src, ptrdiff_t src_stride,
 //                          uint8_t *dst, ptrdiff_t dst_stride,
 //                          const int16_t *filter_x, int x_step_q4,
 //                          const int16_t *filter_y, int y_step_q4,
 //                          int w, int h);
 // void vpx_convolve8_avg_ssse3(const uint8_t *src, ptrdiff_t src_stride,
 //                              uint8_t *dst, ptrdiff_t dst_stride,
 //                              const int16_t *filter_x, int x_step_q4,
 //                              const int16_t *filter_y, int y_step_q4,
 //                              int w, int h);
 FUN_CONV_2D(, ssse3);
 FUN_CONV_2D(avg_ , ssse3);