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+// Copyright 2011 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.
+// -----------------------------------------------------------------------------
+//
+// SSE2 version of some decoding functions (idct, loop filtering).
+//
+// Author: somnath@google.com (Somnath Banerjee)
+// cduvivier@google.com (Christian Duvivier)
+
+#include "./dsp.h"
+
+#if defined(WEBP_USE_SSE2)
+
+// The 3-coeff sparse transform in SSE2 is not really faster than the plain-C
+// one it seems => disable it by default. Uncomment the following to enable:
+// #define USE_TRANSFORM_AC3
+
+#include <emmintrin.h>
+#include "../dec/vp8i.h"
+
+//------------------------------------------------------------------------------
+// Transforms (Paragraph 14.4)
+
+static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) {
+ // This implementation makes use of 16-bit fixed point versions of two
+ // multiply constants:
+ // K1 = sqrt(2) * cos (pi/8) ~= 85627 / 2^16
+ // K2 = sqrt(2) * sin (pi/8) ~= 35468 / 2^16
+ //
+ // To be able to use signed 16-bit integers, we use the following trick to
+ // have constants within range:
+ // - Associated constants are obtained by subtracting the 16-bit fixed point
+ // version of one:
+ // k = K - (1 << 16) => K = k + (1 << 16)
+ // K1 = 85267 => k1 = 20091
+ // K2 = 35468 => k2 = -30068
+ // - The multiplication of a variable by a constant become the sum of the
+ // variable and the multiplication of that variable by the associated
+ // constant:
+ // (x * K) >> 16 = (x * (k + (1 << 16))) >> 16 = ((x * k ) >> 16) + x
+ const __m128i k1 = _mm_set1_epi16(20091);
+ const __m128i k2 = _mm_set1_epi16(-30068);
+ __m128i T0, T1, T2, T3;
+
+ // Load and concatenate the transform coefficients (we'll do two transforms
+ // in parallel). In the case of only one transform, the second half of the
+ // vectors will just contain random value we'll never use nor store.
+ __m128i in0, in1, in2, in3;
+ {
+ in0 = _mm_loadl_epi64((__m128i*)&in[0]);
+ in1 = _mm_loadl_epi64((__m128i*)&in[4]);
+ in2 = _mm_loadl_epi64((__m128i*)&in[8]);
+ in3 = _mm_loadl_epi64((__m128i*)&in[12]);
+ // a00 a10 a20 a30 x x x x
+ // a01 a11 a21 a31 x x x x
+ // a02 a12 a22 a32 x x x x
+ // a03 a13 a23 a33 x x x x
+ if (do_two) {
+ const __m128i inB0 = _mm_loadl_epi64((__m128i*)&in[16]);
+ const __m128i inB1 = _mm_loadl_epi64((__m128i*)&in[20]);
+ const __m128i inB2 = _mm_loadl_epi64((__m128i*)&in[24]);
+ const __m128i inB3 = _mm_loadl_epi64((__m128i*)&in[28]);
+ in0 = _mm_unpacklo_epi64(in0, inB0);
+ in1 = _mm_unpacklo_epi64(in1, inB1);
+ in2 = _mm_unpacklo_epi64(in2, inB2);
+ in3 = _mm_unpacklo_epi64(in3, inB3);
+ // a00 a10 a20 a30 b00 b10 b20 b30
+ // a01 a11 a21 a31 b01 b11 b21 b31
+ // a02 a12 a22 a32 b02 b12 b22 b32
+ // a03 a13 a23 a33 b03 b13 b23 b33
+ }
+ }
+
+ // Vertical pass and subsequent transpose.
+ {
+ // First pass, c and d calculations are longer because of the "trick"
+ // multiplications.
+ const __m128i a = _mm_add_epi16(in0, in2);
+ const __m128i b = _mm_sub_epi16(in0, in2);
+ // c = MUL(in1, K2) - MUL(in3, K1) = MUL(in1, k2) - MUL(in3, k1) + in1 - in3
+ const __m128i c1 = _mm_mulhi_epi16(in1, k2);
+ const __m128i c2 = _mm_mulhi_epi16(in3, k1);
+ const __m128i c3 = _mm_sub_epi16(in1, in3);
+ const __m128i c4 = _mm_sub_epi16(c1, c2);
+ const __m128i c = _mm_add_epi16(c3, c4);
+ // d = MUL(in1, K1) + MUL(in3, K2) = MUL(in1, k1) + MUL(in3, k2) + in1 + in3
+ const __m128i d1 = _mm_mulhi_epi16(in1, k1);
+ const __m128i d2 = _mm_mulhi_epi16(in3, k2);
+ const __m128i d3 = _mm_add_epi16(in1, in3);
+ const __m128i d4 = _mm_add_epi16(d1, d2);
+ const __m128i d = _mm_add_epi16(d3, d4);
+
+ // Second pass.
+ const __m128i tmp0 = _mm_add_epi16(a, d);
+ const __m128i tmp1 = _mm_add_epi16(b, c);
+ const __m128i tmp2 = _mm_sub_epi16(b, c);
+ const __m128i tmp3 = _mm_sub_epi16(a, d);
+
+ // Transpose the two 4x4.
+ // a00 a01 a02 a03 b00 b01 b02 b03
+ // a10 a11 a12 a13 b10 b11 b12 b13
+ // a20 a21 a22 a23 b20 b21 b22 b23
+ // a30 a31 a32 a33 b30 b31 b32 b33
+ const __m128i transpose0_0 = _mm_unpacklo_epi16(tmp0, tmp1);
+ const __m128i transpose0_1 = _mm_unpacklo_epi16(tmp2, tmp3);
+ const __m128i transpose0_2 = _mm_unpackhi_epi16(tmp0, tmp1);
+ const __m128i transpose0_3 = _mm_unpackhi_epi16(tmp2, tmp3);
+ // a00 a10 a01 a11 a02 a12 a03 a13
+ // a20 a30 a21 a31 a22 a32 a23 a33
+ // b00 b10 b01 b11 b02 b12 b03 b13
+ // b20 b30 b21 b31 b22 b32 b23 b33
+ const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1);
+ const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3);
+ const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1);
+ const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3);
+ // a00 a10 a20 a30 a01 a11 a21 a31
+ // b00 b10 b20 b30 b01 b11 b21 b31
+ // a02 a12 a22 a32 a03 a13 a23 a33
+ // b02 b12 a22 b32 b03 b13 b23 b33
+ T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1);
+ T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1);
+ T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3);
+ T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3);
+ // a00 a10 a20 a30 b00 b10 b20 b30
+ // a01 a11 a21 a31 b01 b11 b21 b31
+ // a02 a12 a22 a32 b02 b12 b22 b32
+ // a03 a13 a23 a33 b03 b13 b23 b33
+ }
+
+ // Horizontal pass and subsequent transpose.
+ {
+ // First pass, c and d calculations are longer because of the "trick"
+ // multiplications.
+ const __m128i four = _mm_set1_epi16(4);
+ const __m128i dc = _mm_add_epi16(T0, four);
+ const __m128i a = _mm_add_epi16(dc, T2);
+ const __m128i b = _mm_sub_epi16(dc, T2);
+ // c = MUL(T1, K2) - MUL(T3, K1) = MUL(T1, k2) - MUL(T3, k1) + T1 - T3
+ const __m128i c1 = _mm_mulhi_epi16(T1, k2);
+ const __m128i c2 = _mm_mulhi_epi16(T3, k1);
+ const __m128i c3 = _mm_sub_epi16(T1, T3);
+ const __m128i c4 = _mm_sub_epi16(c1, c2);
+ const __m128i c = _mm_add_epi16(c3, c4);
+ // d = MUL(T1, K1) + MUL(T3, K2) = MUL(T1, k1) + MUL(T3, k2) + T1 + T3
+ const __m128i d1 = _mm_mulhi_epi16(T1, k1);
+ const __m128i d2 = _mm_mulhi_epi16(T3, k2);
+ const __m128i d3 = _mm_add_epi16(T1, T3);
+ const __m128i d4 = _mm_add_epi16(d1, d2);
+ const __m128i d = _mm_add_epi16(d3, d4);
+
+ // Second pass.
+ const __m128i tmp0 = _mm_add_epi16(a, d);
+ const __m128i tmp1 = _mm_add_epi16(b, c);
+ const __m128i tmp2 = _mm_sub_epi16(b, c);
+ const __m128i tmp3 = _mm_sub_epi16(a, d);
+ const __m128i shifted0 = _mm_srai_epi16(tmp0, 3);
+ const __m128i shifted1 = _mm_srai_epi16(tmp1, 3);
+ const __m128i shifted2 = _mm_srai_epi16(tmp2, 3);
+ const __m128i shifted3 = _mm_srai_epi16(tmp3, 3);
+
+ // Transpose the two 4x4.
+ // a00 a01 a02 a03 b00 b01 b02 b03
+ // a10 a11 a12 a13 b10 b11 b12 b13
+ // a20 a21 a22 a23 b20 b21 b22 b23
+ // a30 a31 a32 a33 b30 b31 b32 b33
+ const __m128i transpose0_0 = _mm_unpacklo_epi16(shifted0, shifted1);
+ const __m128i transpose0_1 = _mm_unpacklo_epi16(shifted2, shifted3);
+ const __m128i transpose0_2 = _mm_unpackhi_epi16(shifted0, shifted1);
+ const __m128i transpose0_3 = _mm_unpackhi_epi16(shifted2, shifted3);
+ // a00 a10 a01 a11 a02 a12 a03 a13
+ // a20 a30 a21 a31 a22 a32 a23 a33
+ // b00 b10 b01 b11 b02 b12 b03 b13
+ // b20 b30 b21 b31 b22 b32 b23 b33
+ const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1);
+ const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3);
+ const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1);
+ const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3);
+ // a00 a10 a20 a30 a01 a11 a21 a31
+ // b00 b10 b20 b30 b01 b11 b21 b31
+ // a02 a12 a22 a32 a03 a13 a23 a33
+ // b02 b12 a22 b32 b03 b13 b23 b33
+ T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1);
+ T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1);
+ T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3);
+ T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3);
+ // a00 a10 a20 a30 b00 b10 b20 b30
+ // a01 a11 a21 a31 b01 b11 b21 b31
+ // a02 a12 a22 a32 b02 b12 b22 b32
+ // a03 a13 a23 a33 b03 b13 b23 b33
+ }
+
+ // Add inverse transform to 'dst' and store.
+ {
+ const __m128i zero = _mm_setzero_si128();
+ // Load the reference(s).
+ __m128i dst0, dst1, dst2, dst3;
+ if (do_two) {
+ // Load eight bytes/pixels per line.
+ dst0 = _mm_loadl_epi64((__m128i*)(dst + 0 * BPS));
+ dst1 = _mm_loadl_epi64((__m128i*)(dst + 1 * BPS));
+ dst2 = _mm_loadl_epi64((__m128i*)(dst + 2 * BPS));
+ dst3 = _mm_loadl_epi64((__m128i*)(dst + 3 * BPS));
+ } else {
+ // Load four bytes/pixels per line.
+ dst0 = _mm_cvtsi32_si128(*(int*)(dst + 0 * BPS));
+ dst1 = _mm_cvtsi32_si128(*(int*)(dst + 1 * BPS));
+ dst2 = _mm_cvtsi32_si128(*(int*)(dst + 2 * BPS));
+ dst3 = _mm_cvtsi32_si128(*(int*)(dst + 3 * BPS));
+ }
+ // Convert to 16b.
+ dst0 = _mm_unpacklo_epi8(dst0, zero);
+ dst1 = _mm_unpacklo_epi8(dst1, zero);
+ dst2 = _mm_unpacklo_epi8(dst2, zero);
+ dst3 = _mm_unpacklo_epi8(dst3, zero);
+ // Add the inverse transform(s).
+ dst0 = _mm_add_epi16(dst0, T0);
+ dst1 = _mm_add_epi16(dst1, T1);
+ dst2 = _mm_add_epi16(dst2, T2);
+ dst3 = _mm_add_epi16(dst3, T3);
+ // Unsigned saturate to 8b.
+ dst0 = _mm_packus_epi16(dst0, dst0);
+ dst1 = _mm_packus_epi16(dst1, dst1);
+ dst2 = _mm_packus_epi16(dst2, dst2);
+ dst3 = _mm_packus_epi16(dst3, dst3);
+ // Store the results.
+ if (do_two) {
+ // Store eight bytes/pixels per line.
+ _mm_storel_epi64((__m128i*)(dst + 0 * BPS), dst0);
+ _mm_storel_epi64((__m128i*)(dst + 1 * BPS), dst1);
+ _mm_storel_epi64((__m128i*)(dst + 2 * BPS), dst2);
+ _mm_storel_epi64((__m128i*)(dst + 3 * BPS), dst3);
+ } else {
+ // Store four bytes/pixels per line.
+ *(int*)(dst + 0 * BPS) = _mm_cvtsi128_si32(dst0);
+ *(int*)(dst + 1 * BPS) = _mm_cvtsi128_si32(dst1);
+ *(int*)(dst + 2 * BPS) = _mm_cvtsi128_si32(dst2);
+ *(int*)(dst + 3 * BPS) = _mm_cvtsi128_si32(dst3);
+ }
+ }
+}
+
+#if defined(USE_TRANSFORM_AC3)
+#define MUL(a, b) (((a) * (b)) >> 16)
+static void TransformAC3SSE2(const int16_t* in, uint8_t* dst) {
+ static const int kC1 = 20091 + (1 << 16);
+ static const int kC2 = 35468;
+ const __m128i A = _mm_set1_epi16(in[0] + 4);
+ const __m128i c4 = _mm_set1_epi16(MUL(in[4], kC2));
+ const __m128i d4 = _mm_set1_epi16(MUL(in[4], kC1));
+ const int c1 = MUL(in[1], kC2);
+ const int d1 = MUL(in[1], kC1);
+ const __m128i CD = _mm_set_epi16(0, 0, 0, 0, -d1, -c1, c1, d1);
+ const __m128i B = _mm_adds_epi16(A, CD);
+ const __m128i m0 = _mm_adds_epi16(B, d4);
+ const __m128i m1 = _mm_adds_epi16(B, c4);
+ const __m128i m2 = _mm_subs_epi16(B, c4);
+ const __m128i m3 = _mm_subs_epi16(B, d4);
+ const __m128i zero = _mm_setzero_si128();
+ // Load the source pixels.
+ __m128i dst0 = _mm_cvtsi32_si128(*(int*)(dst + 0 * BPS));
+ __m128i dst1 = _mm_cvtsi32_si128(*(int*)(dst + 1 * BPS));
+ __m128i dst2 = _mm_cvtsi32_si128(*(int*)(dst + 2 * BPS));
+ __m128i dst3 = _mm_cvtsi32_si128(*(int*)(dst + 3 * BPS));
+ // Convert to 16b.
+ dst0 = _mm_unpacklo_epi8(dst0, zero);
+ dst1 = _mm_unpacklo_epi8(dst1, zero);
+ dst2 = _mm_unpacklo_epi8(dst2, zero);
+ dst3 = _mm_unpacklo_epi8(dst3, zero);
+ // Add the inverse transform.
+ dst0 = _mm_adds_epi16(dst0, _mm_srai_epi16(m0, 3));
+ dst1 = _mm_adds_epi16(dst1, _mm_srai_epi16(m1, 3));
+ dst2 = _mm_adds_epi16(dst2, _mm_srai_epi16(m2, 3));
+ dst3 = _mm_adds_epi16(dst3, _mm_srai_epi16(m3, 3));
+ // Unsigned saturate to 8b.
+ dst0 = _mm_packus_epi16(dst0, dst0);
+ dst1 = _mm_packus_epi16(dst1, dst1);
+ dst2 = _mm_packus_epi16(dst2, dst2);
+ dst3 = _mm_packus_epi16(dst3, dst3);
+ // Store the results.
+ *(int*)(dst + 0 * BPS) = _mm_cvtsi128_si32(dst0);
+ *(int*)(dst + 1 * BPS) = _mm_cvtsi128_si32(dst1);
+ *(int*)(dst + 2 * BPS) = _mm_cvtsi128_si32(dst2);
+ *(int*)(dst + 3 * BPS) = _mm_cvtsi128_si32(dst3);
+}
+#undef MUL
+#endif // USE_TRANSFORM_AC3
+
+//------------------------------------------------------------------------------
+// Loop Filter (Paragraph 15)
+
+// Compute abs(p - q) = subs(p - q) OR subs(q - p)
+#define MM_ABS(p, q) _mm_or_si128( \
+ _mm_subs_epu8((q), (p)), \
+ _mm_subs_epu8((p), (q)))
+
+// Shift each byte of "a" by N bits while preserving by the sign bit.
+//
+// It first shifts the lower bytes of the words and then the upper bytes and
+// then merges the results together.
+#define SIGNED_SHIFT_N(a, N) { \
+ __m128i t = a; \
+ t = _mm_slli_epi16(t, 8); \
+ t = _mm_srai_epi16(t, N); \
+ t = _mm_srli_epi16(t, 8); \
+ \
+ a = _mm_srai_epi16(a, N + 8); \
+ a = _mm_slli_epi16(a, 8); \
+ \
+ a = _mm_or_si128(t, a); \
+}
+
+#define FLIP_SIGN_BIT2(a, b) { \
+ a = _mm_xor_si128(a, sign_bit); \
+ b = _mm_xor_si128(b, sign_bit); \
+}
+
+#define FLIP_SIGN_BIT4(a, b, c, d) { \
+ FLIP_SIGN_BIT2(a, b); \
+ FLIP_SIGN_BIT2(c, d); \
+}
+
+#define GET_NOTHEV(p1, p0, q0, q1, hev_thresh, not_hev) { \
+ const __m128i zero = _mm_setzero_si128(); \
+ const __m128i t_1 = MM_ABS(p1, p0); \
+ const __m128i t_2 = MM_ABS(q1, q0); \
+ \
+ const __m128i h = _mm_set1_epi8(hev_thresh); \
+ const __m128i t_3 = _mm_subs_epu8(t_1, h); /* abs(p1 - p0) - hev_tresh */ \
+ const __m128i t_4 = _mm_subs_epu8(t_2, h); /* abs(q1 - q0) - hev_tresh */ \
+ \
+ not_hev = _mm_or_si128(t_3, t_4); \
+ not_hev = _mm_cmpeq_epi8(not_hev, zero); /* not_hev <= t1 && not_hev <= t2 */\
+}
+
+#define GET_BASE_DELTA(p1, p0, q0, q1, o) { \
+ const __m128i qp0 = _mm_subs_epi8(q0, p0); /* q0 - p0 */ \
+ o = _mm_subs_epi8(p1, q1); /* p1 - q1 */ \
+ o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 1 * (q0 - p0) */ \
+ o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 2 * (q0 - p0) */ \
+ o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 3 * (q0 - p0) */ \
+}
+
+#define DO_SIMPLE_FILTER(p0, q0, fl) { \
+ const __m128i three = _mm_set1_epi8(3); \
+ const __m128i four = _mm_set1_epi8(4); \
+ __m128i v3 = _mm_adds_epi8(fl, three); \
+ __m128i v4 = _mm_adds_epi8(fl, four); \
+ \
+ /* Do +4 side */ \
+ SIGNED_SHIFT_N(v4, 3); /* v4 >> 3 */ \
+ q0 = _mm_subs_epi8(q0, v4); /* q0 -= v4 */ \
+ \
+ /* Now do +3 side */ \
+ SIGNED_SHIFT_N(v3, 3); /* v3 >> 3 */ \
+ p0 = _mm_adds_epi8(p0, v3); /* p0 += v3 */ \
+}
+
+// Updates values of 2 pixels at MB edge during complex filtering.
+// Update operations:
+// q = q - delta and p = p + delta; where delta = [(a_hi >> 7), (a_lo >> 7)]
+#define UPDATE_2PIXELS(pi, qi, a_lo, a_hi) { \
+ const __m128i a_lo7 = _mm_srai_epi16(a_lo, 7); \
+ const __m128i a_hi7 = _mm_srai_epi16(a_hi, 7); \
+ const __m128i delta = _mm_packs_epi16(a_lo7, a_hi7); \
+ pi = _mm_adds_epi8(pi, delta); \
+ qi = _mm_subs_epi8(qi, delta); \
+}
+
+static void NeedsFilter(const __m128i* p1, const __m128i* p0, const __m128i* q0,
+ const __m128i* q1, int thresh, __m128i *mask) {
+ __m128i t1 = MM_ABS(*p1, *q1); // abs(p1 - q1)
+ *mask = _mm_set1_epi8(0xFE);
+ t1 = _mm_and_si128(t1, *mask); // set lsb of each byte to zero
+ t1 = _mm_srli_epi16(t1, 1); // abs(p1 - q1) / 2
+
+ *mask = MM_ABS(*p0, *q0); // abs(p0 - q0)
+ *mask = _mm_adds_epu8(*mask, *mask); // abs(p0 - q0) * 2
+ *mask = _mm_adds_epu8(*mask, t1); // abs(p0 - q0) * 2 + abs(p1 - q1) / 2
+
+ t1 = _mm_set1_epi8(thresh);
+ *mask = _mm_subs_epu8(*mask, t1); // mask <= thresh
+ *mask = _mm_cmpeq_epi8(*mask, _mm_setzero_si128());
+}
+
+//------------------------------------------------------------------------------
+// Edge filtering functions
+
+// Applies filter on 2 pixels (p0 and q0)
+static WEBP_INLINE void DoFilter2(const __m128i* p1, __m128i* p0, __m128i* q0,
+ const __m128i* q1, int thresh) {
+ __m128i a, mask;
+ const __m128i sign_bit = _mm_set1_epi8(0x80);
+ const __m128i p1s = _mm_xor_si128(*p1, sign_bit);
+ const __m128i q1s = _mm_xor_si128(*q1, sign_bit);
+
+ NeedsFilter(p1, p0, q0, q1, thresh, &mask);
+
+ // convert to signed values
+ FLIP_SIGN_BIT2(*p0, *q0);
+
+ GET_BASE_DELTA(p1s, *p0, *q0, q1s, a);
+ a = _mm_and_si128(a, mask); // mask filter values we don't care about
+ DO_SIMPLE_FILTER(*p0, *q0, a);
+
+ // unoffset
+ FLIP_SIGN_BIT2(*p0, *q0);
+}
+
+// Applies filter on 4 pixels (p1, p0, q0 and q1)
+static WEBP_INLINE void DoFilter4(__m128i* p1, __m128i *p0,
+ __m128i* q0, __m128i* q1,
+ const __m128i* mask, int hev_thresh) {
+ __m128i not_hev;
+ __m128i t1, t2, t3;
+ const __m128i sign_bit = _mm_set1_epi8(0x80);
+
+ // compute hev mask
+ GET_NOTHEV(*p1, *p0, *q0, *q1, hev_thresh, not_hev);
+
+ // convert to signed values
+ FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1);
+
+ t1 = _mm_subs_epi8(*p1, *q1); // p1 - q1
+ t1 = _mm_andnot_si128(not_hev, t1); // hev(p1 - q1)
+ t2 = _mm_subs_epi8(*q0, *p0); // q0 - p0
+ t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 1 * (q0 - p0)
+ t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 2 * (q0 - p0)
+ t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 3 * (q0 - p0)
+ t1 = _mm_and_si128(t1, *mask); // mask filter values we don't care about
+
+ // Do +4 side
+ t2 = _mm_set1_epi8(4);
+ t2 = _mm_adds_epi8(t1, t2); // 3 * (q0 - p0) + (p1 - q1) + 4
+ SIGNED_SHIFT_N(t2, 3); // (3 * (q0 - p0) + hev(p1 - q1) + 4) >> 3
+ t3 = t2; // save t2
+ *q0 = _mm_subs_epi8(*q0, t2); // q0 -= t2
+
+ // Now do +3 side
+ t2 = _mm_set1_epi8(3);
+ t2 = _mm_adds_epi8(t1, t2); // +3 instead of +4
+ SIGNED_SHIFT_N(t2, 3); // (3 * (q0 - p0) + hev(p1 - q1) + 3) >> 3
+ *p0 = _mm_adds_epi8(*p0, t2); // p0 += t2
+
+ t2 = _mm_set1_epi8(1);
+ t3 = _mm_adds_epi8(t3, t2);
+ SIGNED_SHIFT_N(t3, 1); // (3 * (q0 - p0) + hev(p1 - q1) + 4) >> 4
+
+ t3 = _mm_and_si128(not_hev, t3); // if !hev
+ *q1 = _mm_subs_epi8(*q1, t3); // q1 -= t3
+ *p1 = _mm_adds_epi8(*p1, t3); // p1 += t3
+
+ // unoffset
+ FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1);
+}
+
+// Applies filter on 6 pixels (p2, p1, p0, q0, q1 and q2)
+static WEBP_INLINE void DoFilter6(__m128i *p2, __m128i* p1, __m128i *p0,
+ __m128i* q0, __m128i* q1, __m128i *q2,
+ const __m128i* mask, int hev_thresh) {
+ __m128i a, not_hev;
+ const __m128i sign_bit = _mm_set1_epi8(0x80);
+
+ // compute hev mask
+ GET_NOTHEV(*p1, *p0, *q0, *q1, hev_thresh, not_hev);
+
+ // convert to signed values
+ FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1);
+ FLIP_SIGN_BIT2(*p2, *q2);
+
+ GET_BASE_DELTA(*p1, *p0, *q0, *q1, a);
+
+ { // do simple filter on pixels with hev
+ const __m128i m = _mm_andnot_si128(not_hev, *mask);
+ const __m128i f = _mm_and_si128(a, m);
+ DO_SIMPLE_FILTER(*p0, *q0, f);
+ }
+ { // do strong filter on pixels with not hev
+ const __m128i zero = _mm_setzero_si128();
+ const __m128i nine = _mm_set1_epi16(0x0900);
+ const __m128i sixty_three = _mm_set1_epi16(63);
+
+ const __m128i m = _mm_and_si128(not_hev, *mask);
+ const __m128i f = _mm_and_si128(a, m);
+ const __m128i f_lo = _mm_unpacklo_epi8(zero, f);
+ const __m128i f_hi = _mm_unpackhi_epi8(zero, f);
+
+ const __m128i f9_lo = _mm_mulhi_epi16(f_lo, nine); // Filter (lo) * 9
+ const __m128i f9_hi = _mm_mulhi_epi16(f_hi, nine); // Filter (hi) * 9
+ const __m128i f18_lo = _mm_add_epi16(f9_lo, f9_lo); // Filter (lo) * 18
+ const __m128i f18_hi = _mm_add_epi16(f9_hi, f9_hi); // Filter (hi) * 18
+
+ const __m128i a2_lo = _mm_add_epi16(f9_lo, sixty_three); // Filter * 9 + 63
+ const __m128i a2_hi = _mm_add_epi16(f9_hi, sixty_three); // Filter * 9 + 63
+
+ const __m128i a1_lo = _mm_add_epi16(f18_lo, sixty_three); // F... * 18 + 63
+ const __m128i a1_hi = _mm_add_epi16(f18_hi, sixty_three); // F... * 18 + 63
+
+ const __m128i a0_lo = _mm_add_epi16(f18_lo, a2_lo); // Filter * 27 + 63
+ const __m128i a0_hi = _mm_add_epi16(f18_hi, a2_hi); // Filter * 27 + 63
+
+ UPDATE_2PIXELS(*p2, *q2, a2_lo, a2_hi);
+ UPDATE_2PIXELS(*p1, *q1, a1_lo, a1_hi);
+ UPDATE_2PIXELS(*p0, *q0, a0_lo, a0_hi);
+ }
+
+ // unoffset
+ FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1);
+ FLIP_SIGN_BIT2(*p2, *q2);
+}
+
+// reads 8 rows across a vertical edge.
+//
+// TODO(somnath): Investigate _mm_shuffle* also see if it can be broken into
+// two Load4x4() to avoid code duplication.
+static WEBP_INLINE void Load8x4(const uint8_t* b, int stride,
+ __m128i* p, __m128i* q) {
+ __m128i t1, t2;
+
+ // Load 0th, 1st, 4th and 5th rows
+ __m128i r0 = _mm_cvtsi32_si128(*((int*)&b[0 * stride])); // 03 02 01 00
+ __m128i r1 = _mm_cvtsi32_si128(*((int*)&b[1 * stride])); // 13 12 11 10
+ __m128i r4 = _mm_cvtsi32_si128(*((int*)&b[4 * stride])); // 43 42 41 40
+ __m128i r5 = _mm_cvtsi32_si128(*((int*)&b[5 * stride])); // 53 52 51 50
+
+ r0 = _mm_unpacklo_epi32(r0, r4); // 43 42 41 40 03 02 01 00
+ r1 = _mm_unpacklo_epi32(r1, r5); // 53 52 51 50 13 12 11 10
+
+ // t1 = 53 43 52 42 51 41 50 40 13 03 12 02 11 01 10 00
+ t1 = _mm_unpacklo_epi8(r0, r1);
+
+ // Load 2nd, 3rd, 6th and 7th rows
+ r0 = _mm_cvtsi32_si128(*((int*)&b[2 * stride])); // 23 22 21 22
+ r1 = _mm_cvtsi32_si128(*((int*)&b[3 * stride])); // 33 32 31 30
+ r4 = _mm_cvtsi32_si128(*((int*)&b[6 * stride])); // 63 62 61 60
+ r5 = _mm_cvtsi32_si128(*((int*)&b[7 * stride])); // 73 72 71 70
+
+ r0 = _mm_unpacklo_epi32(r0, r4); // 63 62 61 60 23 22 21 20
+ r1 = _mm_unpacklo_epi32(r1, r5); // 73 72 71 70 33 32 31 30
+
+ // t2 = 73 63 72 62 71 61 70 60 33 23 32 22 31 21 30 20
+ t2 = _mm_unpacklo_epi8(r0, r1);
+
+ // t1 = 33 23 13 03 32 22 12 02 31 21 11 01 30 20 10 00
+ // t2 = 73 63 53 43 72 62 52 42 71 61 51 41 70 60 50 40
+ r0 = t1;
+ t1 = _mm_unpacklo_epi16(t1, t2);
+ t2 = _mm_unpackhi_epi16(r0, t2);
+
+ // *p = 71 61 51 41 31 21 11 01 70 60 50 40 30 20 10 00
+ // *q = 73 63 53 43 33 23 13 03 72 62 52 42 32 22 12 02
+ *p = _mm_unpacklo_epi32(t1, t2);
+ *q = _mm_unpackhi_epi32(t1, t2);
+}
+
+static WEBP_INLINE void Load16x4(const uint8_t* r0, const uint8_t* r8,
+ int stride,
+ __m128i* p1, __m128i* p0,
+ __m128i* q0, __m128i* q1) {
+ __m128i t1, t2;
+ // Assume the pixels around the edge (|) are numbered as follows
+ // 00 01 | 02 03
+ // 10 11 | 12 13
+ // ... | ...
+ // e0 e1 | e2 e3
+ // f0 f1 | f2 f3
+ //
+ // r0 is pointing to the 0th row (00)
+ // r8 is pointing to the 8th row (80)
+
+ // Load
+ // p1 = 71 61 51 41 31 21 11 01 70 60 50 40 30 20 10 00
+ // q0 = 73 63 53 43 33 23 13 03 72 62 52 42 32 22 12 02
+ // p0 = f1 e1 d1 c1 b1 a1 91 81 f0 e0 d0 c0 b0 a0 90 80
+ // q1 = f3 e3 d3 c3 b3 a3 93 83 f2 e2 d2 c2 b2 a2 92 82
+ Load8x4(r0, stride, p1, q0);
+ Load8x4(r8, stride, p0, q1);
+
+ t1 = *p1;
+ t2 = *q0;
+ // p1 = f0 e0 d0 c0 b0 a0 90 80 70 60 50 40 30 20 10 00
+ // p0 = f1 e1 d1 c1 b1 a1 91 81 71 61 51 41 31 21 11 01
+ // q0 = f2 e2 d2 c2 b2 a2 92 82 72 62 52 42 32 22 12 02
+ // q1 = f3 e3 d3 c3 b3 a3 93 83 73 63 53 43 33 23 13 03
+ *p1 = _mm_unpacklo_epi64(t1, *p0);
+ *p0 = _mm_unpackhi_epi64(t1, *p0);
+ *q0 = _mm_unpacklo_epi64(t2, *q1);
+ *q1 = _mm_unpackhi_epi64(t2, *q1);
+}
+
+static WEBP_INLINE void Store4x4(__m128i* x, uint8_t* dst, int stride) {
+ int i;
+ for (i = 0; i < 4; ++i, dst += stride) {
+ *((int32_t*)dst) = _mm_cvtsi128_si32(*x);
+ *x = _mm_srli_si128(*x, 4);
+ }
+}
+
+// Transpose back and store
+static WEBP_INLINE void Store16x4(uint8_t* r0, uint8_t* r8, int stride,
+ __m128i* p1, __m128i* p0,
+ __m128i* q0, __m128i* q1) {
+ __m128i t1;
+
+ // p0 = 71 70 61 60 51 50 41 40 31 30 21 20 11 10 01 00
+ // p1 = f1 f0 e1 e0 d1 d0 c1 c0 b1 b0 a1 a0 91 90 81 80
+ t1 = *p0;
+ *p0 = _mm_unpacklo_epi8(*p1, t1);
+ *p1 = _mm_unpackhi_epi8(*p1, t1);
+
+ // q0 = 73 72 63 62 53 52 43 42 33 32 23 22 13 12 03 02
+ // q1 = f3 f2 e3 e2 d3 d2 c3 c2 b3 b2 a3 a2 93 92 83 82
+ t1 = *q0;
+ *q0 = _mm_unpacklo_epi8(t1, *q1);
+ *q1 = _mm_unpackhi_epi8(t1, *q1);
+
+ // p0 = 33 32 31 30 23 22 21 20 13 12 11 10 03 02 01 00
+ // q0 = 73 72 71 70 63 62 61 60 53 52 51 50 43 42 41 40
+ t1 = *p0;
+ *p0 = _mm_unpacklo_epi16(t1, *q0);
+ *q0 = _mm_unpackhi_epi16(t1, *q0);
+
+ // p1 = b3 b2 b1 b0 a3 a2 a1 a0 93 92 91 90 83 82 81 80
+ // q1 = f3 f2 f1 f0 e3 e2 e1 e0 d3 d2 d1 d0 c3 c2 c1 c0
+ t1 = *p1;
+ *p1 = _mm_unpacklo_epi16(t1, *q1);
+ *q1 = _mm_unpackhi_epi16(t1, *q1);
+
+ Store4x4(p0, r0, stride);
+ r0 += 4 * stride;
+ Store4x4(q0, r0, stride);
+
+ Store4x4(p1, r8, stride);
+ r8 += 4 * stride;
+ Store4x4(q1, r8, stride);
+}
+
+//------------------------------------------------------------------------------
+// Simple In-loop filtering (Paragraph 15.2)
+
+static void SimpleVFilter16SSE2(uint8_t* p, int stride, int thresh) {
+ // Load
+ __m128i p1 = _mm_loadu_si128((__m128i*)&p[-2 * stride]);
+ __m128i p0 = _mm_loadu_si128((__m128i*)&p[-stride]);
+ __m128i q0 = _mm_loadu_si128((__m128i*)&p[0]);
+ __m128i q1 = _mm_loadu_si128((__m128i*)&p[stride]);
+
+ DoFilter2(&p1, &p0, &q0, &q1, thresh);
+
+ // Store
+ _mm_storeu_si128((__m128i*)&p[-stride], p0);
+ _mm_storeu_si128((__m128i*)p, q0);
+}
+
+static void SimpleHFilter16SSE2(uint8_t* p, int stride, int thresh) {
+ __m128i p1, p0, q0, q1;
+
+ p -= 2; // beginning of p1
+
+ Load16x4(p, p + 8 * stride, stride, &p1, &p0, &q0, &q1);
+ DoFilter2(&p1, &p0, &q0, &q1, thresh);
+ Store16x4(p, p + 8 * stride, stride, &p1, &p0, &q0, &q1);
+}
+
+static void SimpleVFilter16iSSE2(uint8_t* p, int stride, int thresh) {
+ int k;
+ for (k = 3; k > 0; --k) {
+ p += 4 * stride;
+ SimpleVFilter16SSE2(p, stride, thresh);
+ }
+}
+
+static void SimpleHFilter16iSSE2(uint8_t* p, int stride, int thresh) {
+ int k;
+ for (k = 3; k > 0; --k) {
+ p += 4;
+ SimpleHFilter16SSE2(p, stride, thresh);
+ }
+}
+
+//------------------------------------------------------------------------------
+// Complex In-loop filtering (Paragraph 15.3)
+
+#define MAX_DIFF1(p3, p2, p1, p0, m) { \
+ m = MM_ABS(p3, p2); \
+ m = _mm_max_epu8(m, MM_ABS(p2, p1)); \
+ m = _mm_max_epu8(m, MM_ABS(p1, p0)); \
+}
+
+#define MAX_DIFF2(p3, p2, p1, p0, m) { \
+ m = _mm_max_epu8(m, MM_ABS(p3, p2)); \
+ m = _mm_max_epu8(m, MM_ABS(p2, p1)); \
+ m = _mm_max_epu8(m, MM_ABS(p1, p0)); \
+}
+
+#define LOAD_H_EDGES4(p, stride, e1, e2, e3, e4) { \
+ e1 = _mm_loadu_si128((__m128i*)&(p)[0 * stride]); \
+ e2 = _mm_loadu_si128((__m128i*)&(p)[1 * stride]); \
+ e3 = _mm_loadu_si128((__m128i*)&(p)[2 * stride]); \
+ e4 = _mm_loadu_si128((__m128i*)&(p)[3 * stride]); \
+}
+
+#define LOADUV_H_EDGE(p, u, v, stride) { \
+ p = _mm_loadl_epi64((__m128i*)&(u)[(stride)]); \
+ p = _mm_unpacklo_epi64(p, _mm_loadl_epi64((__m128i*)&(v)[(stride)])); \
+}
+
+#define LOADUV_H_EDGES4(u, v, stride, e1, e2, e3, e4) { \
+ LOADUV_H_EDGE(e1, u, v, 0 * stride); \
+ LOADUV_H_EDGE(e2, u, v, 1 * stride); \
+ LOADUV_H_EDGE(e3, u, v, 2 * stride); \
+ LOADUV_H_EDGE(e4, u, v, 3 * stride); \
+}
+
+#define STOREUV(p, u, v, stride) { \
+ _mm_storel_epi64((__m128i*)&u[(stride)], p); \
+ p = _mm_srli_si128(p, 8); \
+ _mm_storel_epi64((__m128i*)&v[(stride)], p); \
+}
+
+#define COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask) { \
+ __m128i fl_yes; \
+ const __m128i it = _mm_set1_epi8(ithresh); \
+ mask = _mm_subs_epu8(mask, it); \
+ mask = _mm_cmpeq_epi8(mask, _mm_setzero_si128()); \
+ NeedsFilter(&p1, &p0, &q0, &q1, thresh, &fl_yes); \
+ mask = _mm_and_si128(mask, fl_yes); \
+}
+
+// on macroblock edges
+static void VFilter16SSE2(uint8_t* p, int stride,
+ int thresh, int ithresh, int hev_thresh) {
+ __m128i t1;
+ __m128i mask;
+ __m128i p2, p1, p0, q0, q1, q2;
+
+ // Load p3, p2, p1, p0
+ LOAD_H_EDGES4(p - 4 * stride, stride, t1, p2, p1, p0);
+ MAX_DIFF1(t1, p2, p1, p0, mask);
+
+ // Load q0, q1, q2, q3
+ LOAD_H_EDGES4(p, stride, q0, q1, q2, t1);
+ MAX_DIFF2(t1, q2, q1, q0, mask);
+
+ COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask);
+ DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh);
+
+ // Store
+ _mm_storeu_si128((__m128i*)&p[-3 * stride], p2);
+ _mm_storeu_si128((__m128i*)&p[-2 * stride], p1);
+ _mm_storeu_si128((__m128i*)&p[-1 * stride], p0);
+ _mm_storeu_si128((__m128i*)&p[0 * stride], q0);
+ _mm_storeu_si128((__m128i*)&p[1 * stride], q1);
+ _mm_storeu_si128((__m128i*)&p[2 * stride], q2);
+}
+
+static void HFilter16SSE2(uint8_t* p, int stride,
+ int thresh, int ithresh, int hev_thresh) {
+ __m128i mask;
+ __m128i p3, p2, p1, p0, q0, q1, q2, q3;
+
+ uint8_t* const b = p - 4;
+ Load16x4(b, b + 8 * stride, stride, &p3, &p2, &p1, &p0); // p3, p2, p1, p0
+ MAX_DIFF1(p3, p2, p1, p0, mask);
+
+ Load16x4(p, p + 8 * stride, stride, &q0, &q1, &q2, &q3); // q0, q1, q2, q3
+ MAX_DIFF2(q3, q2, q1, q0, mask);
+
+ COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask);
+ DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh);
+
+ Store16x4(b, b + 8 * stride, stride, &p3, &p2, &p1, &p0);
+ Store16x4(p, p + 8 * stride, stride, &q0, &q1, &q2, &q3);
+}
+
+// on three inner edges
+static void VFilter16iSSE2(uint8_t* p, int stride,
+ int thresh, int ithresh, int hev_thresh) {
+ int k;
+ __m128i mask;
+ __m128i t1, t2, p1, p0, q0, q1;
+
+ for (k = 3; k > 0; --k) {
+ // Load p3, p2, p1, p0
+ LOAD_H_EDGES4(p, stride, t2, t1, p1, p0);
+ MAX_DIFF1(t2, t1, p1, p0, mask);
+
+ p += 4 * stride;
+
+ // Load q0, q1, q2, q3
+ LOAD_H_EDGES4(p, stride, q0, q1, t1, t2);
+ MAX_DIFF2(t2, t1, q1, q0, mask);
+
+ COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask);
+ DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh);
+
+ // Store
+ _mm_storeu_si128((__m128i*)&p[-2 * stride], p1);
+ _mm_storeu_si128((__m128i*)&p[-1 * stride], p0);
+ _mm_storeu_si128((__m128i*)&p[0 * stride], q0);
+ _mm_storeu_si128((__m128i*)&p[1 * stride], q1);
+ }
+}
+
+static void HFilter16iSSE2(uint8_t* p, int stride,
+ int thresh, int ithresh, int hev_thresh) {
+ int k;
+ uint8_t* b;
+ __m128i mask;
+ __m128i t1, t2, p1, p0, q0, q1;
+
+ for (k = 3; k > 0; --k) {
+ b = p;
+ Load16x4(b, b + 8 * stride, stride, &t2, &t1, &p1, &p0); // p3, p2, p1, p0
+ MAX_DIFF1(t2, t1, p1, p0, mask);
+
+ b += 4; // beginning of q0
+ Load16x4(b, b + 8 * stride, stride, &q0, &q1, &t1, &t2); // q0, q1, q2, q3
+ MAX_DIFF2(t2, t1, q1, q0, mask);
+
+ COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask);
+ DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh);
+
+ b -= 2; // beginning of p1
+ Store16x4(b, b + 8 * stride, stride, &p1, &p0, &q0, &q1);
+
+ p += 4;
+ }
+}
+
+// 8-pixels wide variant, for chroma filtering
+static void VFilter8SSE2(uint8_t* u, uint8_t* v, int stride,
+ int thresh, int ithresh, int hev_thresh) {
+ __m128i mask;
+ __m128i t1, p2, p1, p0, q0, q1, q2;
+
+ // Load p3, p2, p1, p0
+ LOADUV_H_EDGES4(u - 4 * stride, v - 4 * stride, stride, t1, p2, p1, p0);
+ MAX_DIFF1(t1, p2, p1, p0, mask);
+
+ // Load q0, q1, q2, q3
+ LOADUV_H_EDGES4(u, v, stride, q0, q1, q2, t1);
+ MAX_DIFF2(t1, q2, q1, q0, mask);
+
+ COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask);
+ DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh);
+
+ // Store
+ STOREUV(p2, u, v, -3 * stride);
+ STOREUV(p1, u, v, -2 * stride);
+ STOREUV(p0, u, v, -1 * stride);
+ STOREUV(q0, u, v, 0 * stride);
+ STOREUV(q1, u, v, 1 * stride);
+ STOREUV(q2, u, v, 2 * stride);
+}
+
+static void HFilter8SSE2(uint8_t* u, uint8_t* v, int stride,
+ int thresh, int ithresh, int hev_thresh) {
+ __m128i mask;
+ __m128i p3, p2, p1, p0, q0, q1, q2, q3;
+
+ uint8_t* const tu = u - 4;
+ uint8_t* const tv = v - 4;
+ Load16x4(tu, tv, stride, &p3, &p2, &p1, &p0); // p3, p2, p1, p0
+ MAX_DIFF1(p3, p2, p1, p0, mask);
+
+ Load16x4(u, v, stride, &q0, &q1, &q2, &q3); // q0, q1, q2, q3
+ MAX_DIFF2(q3, q2, q1, q0, mask);
+
+ COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask);
+ DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh);
+
+ Store16x4(tu, tv, stride, &p3, &p2, &p1, &p0);
+ Store16x4(u, v, stride, &q0, &q1, &q2, &q3);
+}
+
+static void VFilter8iSSE2(uint8_t* u, uint8_t* v, int stride,
+ int thresh, int ithresh, int hev_thresh) {
+ __m128i mask;
+ __m128i t1, t2, p1, p0, q0, q1;
+
+ // Load p3, p2, p1, p0
+ LOADUV_H_EDGES4(u, v, stride, t2, t1, p1, p0);
+ MAX_DIFF1(t2, t1, p1, p0, mask);
+
+ u += 4 * stride;
+ v += 4 * stride;
+
+ // Load q0, q1, q2, q3
+ LOADUV_H_EDGES4(u, v, stride, q0, q1, t1, t2);
+ MAX_DIFF2(t2, t1, q1, q0, mask);
+
+ COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask);
+ DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh);
+
+ // Store
+ STOREUV(p1, u, v, -2 * stride);
+ STOREUV(p0, u, v, -1 * stride);
+ STOREUV(q0, u, v, 0 * stride);
+ STOREUV(q1, u, v, 1 * stride);
+}
+
+static void HFilter8iSSE2(uint8_t* u, uint8_t* v, int stride,
+ int thresh, int ithresh, int hev_thresh) {
+ __m128i mask;
+ __m128i t1, t2, p1, p0, q0, q1;
+ Load16x4(u, v, stride, &t2, &t1, &p1, &p0); // p3, p2, p1, p0
+ MAX_DIFF1(t2, t1, p1, p0, mask);
+
+ u += 4; // beginning of q0
+ v += 4;
+ Load16x4(u, v, stride, &q0, &q1, &t1, &t2); // q0, q1, q2, q3
+ MAX_DIFF2(t2, t1, q1, q0, mask);
+
+ COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask);
+ DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh);
+
+ u -= 2; // beginning of p1
+ v -= 2;
+ Store16x4(u, v, stride, &p1, &p0, &q0, &q1);
+}
+
+#endif // WEBP_USE_SSE2
+
+//------------------------------------------------------------------------------
+// Entry point
+
+extern void VP8DspInitSSE2(void);
+
+void VP8DspInitSSE2(void) {
+#if defined(WEBP_USE_SSE2)
+ VP8Transform = TransformSSE2;
+#if defined(USE_TRANSFORM_AC3)
+ VP8TransformAC3 = TransformAC3SSE2;
+#endif
+
+ VP8VFilter16 = VFilter16SSE2;
+ VP8HFilter16 = HFilter16SSE2;
+ VP8VFilter8 = VFilter8SSE2;
+ VP8HFilter8 = HFilter8SSE2;
+ VP8VFilter16i = VFilter16iSSE2;
+ VP8HFilter16i = HFilter16iSSE2;
+ VP8VFilter8i = VFilter8iSSE2;
+ VP8HFilter8i = HFilter8iSSE2;
+
+ VP8SimpleVFilter16 = SimpleVFilter16SSE2;
+ VP8SimpleHFilter16 = SimpleHFilter16SSE2;
+ VP8SimpleVFilter16i = SimpleVFilter16iSSE2;
+ VP8SimpleHFilter16i = SimpleHFilter16iSSE2;
+#endif // WEBP_USE_SSE2
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-02 09:15:50 +0000