1 files changed, 105 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/x86/sum_squares_sse2.c b/media/libvpx/libvpx/vpx_dsp/x86/sum_squares_sse2.c
new file mode 100644
index 0000000000..df6514b2c4
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/x86/sum_squares_sse2.c
@@ -0,0 +1,105 @@
+/*
+ *  Copyright (c) 2016 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <assert.h>
+#include <emmintrin.h>
+
+#include "./vpx_dsp_rtcd.h"
+#include "vpx_dsp/x86/mem_sse2.h"
+
+uint64_t vpx_sum_squares_2d_i16_sse2(const int16_t *src, int stride, int size) {
+  // Over 75% of all calls are with size == 4.
+  if (size == 4) {
+    __m128i s[2], sq[2], ss;
+
+    s[0] = _mm_loadl_epi64((const __m128i *)(src + 0 * stride));
+    s[0] = loadh_epi64(s[0], src + 1 * stride);
+    s[1] = _mm_loadl_epi64((const __m128i *)(src + 2 * stride));
+    s[1] = loadh_epi64(s[1], src + 3 * stride);
+    sq[0] = _mm_madd_epi16(s[0], s[0]);
+    sq[1] = _mm_madd_epi16(s[1], s[1]);
+    sq[0] = _mm_add_epi32(sq[0], sq[1]);
+    ss = _mm_add_epi32(sq[0], _mm_srli_si128(sq[0], 8));
+    ss = _mm_add_epi32(ss, _mm_srli_epi64(ss, 32));
+
+    return (uint64_t)_mm_cvtsi128_si32(ss);
+  } else {
+    // Generic case
+    int r = size;
+    const __m128i v_zext_mask_q = _mm_set_epi32(0, -1, 0, -1);
+    __m128i v_acc_q = _mm_setzero_si128();
+
+    assert(size % 8 == 0);
+
+    do {
+      int c = 0;
+      __m128i v_acc_d = _mm_setzero_si128();
+
+      do {
+        const int16_t *const b = src + c;
+        const __m128i v_val_0_w =
+            _mm_load_si128((const __m128i *)(b + 0 * stride));
+        const __m128i v_val_1_w =
+            _mm_load_si128((const __m128i *)(b + 1 * stride));
+        const __m128i v_val_2_w =
+            _mm_load_si128((const __m128i *)(b + 2 * stride));
+        const __m128i v_val_3_w =
+            _mm_load_si128((const __m128i *)(b + 3 * stride));
+        const __m128i v_val_4_w =
+            _mm_load_si128((const __m128i *)(b + 4 * stride));
+        const __m128i v_val_5_w =
+            _mm_load_si128((const __m128i *)(b + 5 * stride));
+        const __m128i v_val_6_w =
+            _mm_load_si128((const __m128i *)(b + 6 * stride));
+        const __m128i v_val_7_w =
+            _mm_load_si128((const __m128i *)(b + 7 * stride));
+
+        const __m128i v_sq_0_d = _mm_madd_epi16(v_val_0_w, v_val_0_w);
+        const __m128i v_sq_1_d = _mm_madd_epi16(v_val_1_w, v_val_1_w);
+        const __m128i v_sq_2_d = _mm_madd_epi16(v_val_2_w, v_val_2_w);
+        const __m128i v_sq_3_d = _mm_madd_epi16(v_val_3_w, v_val_3_w);
+        const __m128i v_sq_4_d = _mm_madd_epi16(v_val_4_w, v_val_4_w);
+        const __m128i v_sq_5_d = _mm_madd_epi16(v_val_5_w, v_val_5_w);
+        const __m128i v_sq_6_d = _mm_madd_epi16(v_val_6_w, v_val_6_w);
+        const __m128i v_sq_7_d = _mm_madd_epi16(v_val_7_w, v_val_7_w);
+
+        const __m128i v_sum_01_d = _mm_add_epi32(v_sq_0_d, v_sq_1_d);
+        const __m128i v_sum_23_d = _mm_add_epi32(v_sq_2_d, v_sq_3_d);
+        const __m128i v_sum_45_d = _mm_add_epi32(v_sq_4_d, v_sq_5_d);
+        const __m128i v_sum_67_d = _mm_add_epi32(v_sq_6_d, v_sq_7_d);
+
+        const __m128i v_sum_0123_d = _mm_add_epi32(v_sum_01_d, v_sum_23_d);
+        const __m128i v_sum_4567_d = _mm_add_epi32(v_sum_45_d, v_sum_67_d);
+
+        v_acc_d = _mm_add_epi32(v_acc_d, v_sum_0123_d);
+        v_acc_d = _mm_add_epi32(v_acc_d, v_sum_4567_d);
+        c += 8;
+      } while (c < size);
+
+      v_acc_q = _mm_add_epi64(v_acc_q, _mm_and_si128(v_acc_d, v_zext_mask_q));
+      v_acc_q = _mm_add_epi64(v_acc_q, _mm_srli_epi64(v_acc_d, 32));
+
+      src += 8 * stride;
+      r -= 8;
+    } while (r);
+
+    v_acc_q = _mm_add_epi64(v_acc_q, _mm_srli_si128(v_acc_q, 8));
+
+#if VPX_ARCH_X86_64
+    return (uint64_t)_mm_cvtsi128_si64(v_acc_q);
+#else
+    {
+      uint64_t tmp;
+      _mm_storel_epi64((__m128i *)&tmp, v_acc_q);
+      return tmp;
+    }
+#endif
+  }
+}