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enc_sse41: add Disto4x4 / Disto16x16
direct translation from sse2; minor gain, fewer instructions Change-Id: I60288a842fac1a686b82b5cab637931789fe29f2
This commit is contained in:
James Zern
parent
94055503e3
commit
1a338fb306
@ -15,6 +15,7 @@
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#if defined(WEBP_USE_SSE41)
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#include <smmintrin.h>
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#include <stdlib.h> // for abs()
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#include "../enc/vp8enci.h"
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@ -107,6 +108,166 @@ static int SSE16x8(const uint8_t* a, const uint8_t* b) {
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return SSE_16xN(a, b, 4);
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}
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//------------------------------------------------------------------------------
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// Texture distortion
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//
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// We try to match the spectral content (weighted) between source and
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// reconstructed samples.
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// Hadamard transform
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// Returns the difference between the weighted sum of the absolute value of
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// transformed coefficients.
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static int TTransform(const uint8_t* inA, const uint8_t* inB,
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const uint16_t* const w) {
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__m128i tmp_0, tmp_1, tmp_2, tmp_3;
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// Load, combine and transpose inputs.
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{
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const __m128i inA_0 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 0]);
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const __m128i inA_1 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 1]);
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const __m128i inA_2 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 2]);
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const __m128i inA_3 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 3]);
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const __m128i inB_0 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 0]);
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const __m128i inB_1 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 1]);
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const __m128i inB_2 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 2]);
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const __m128i inB_3 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 3]);
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// Combine inA and inB (we'll do two transforms in parallel).
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const __m128i inAB_0 = _mm_unpacklo_epi8(inA_0, inB_0);
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const __m128i inAB_1 = _mm_unpacklo_epi8(inA_1, inB_1);
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const __m128i inAB_2 = _mm_unpacklo_epi8(inA_2, inB_2);
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const __m128i inAB_3 = _mm_unpacklo_epi8(inA_3, inB_3);
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// a00 b00 a01 b01 a02 b03 a03 b03 0 0 0 0 0 0 0 0
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// a10 b10 a11 b11 a12 b12 a13 b13 0 0 0 0 0 0 0 0
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// a20 b20 a21 b21 a22 b22 a23 b23 0 0 0 0 0 0 0 0
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// a30 b30 a31 b31 a32 b32 a33 b33 0 0 0 0 0 0 0 0
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// Transpose the two 4x4, discarding the filling zeroes.
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const __m128i transpose0_0 = _mm_unpacklo_epi8(inAB_0, inAB_2);
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const __m128i transpose0_1 = _mm_unpacklo_epi8(inAB_1, inAB_3);
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// a00 a20 b00 b20 a01 a21 b01 b21 a02 a22 b02 b22 a03 a23 b03 b23
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// a10 a30 b10 b30 a11 a31 b11 b31 a12 a32 b12 b32 a13 a33 b13 b33
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const __m128i transpose1_0 = _mm_unpacklo_epi8(transpose0_0, transpose0_1);
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const __m128i transpose1_1 = _mm_unpackhi_epi8(transpose0_0, transpose0_1);
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// a00 a10 a20 a30 b00 b10 b20 b30 a01 a11 a21 a31 b01 b11 b21 b31
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// a02 a12 a22 a32 b02 b12 b22 b32 a03 a13 a23 a33 b03 b13 b23 b33
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// Convert to 16b.
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tmp_0 = _mm_cvtepu8_epi16(transpose1_0);
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tmp_1 = _mm_cvtepu8_epi16(_mm_srli_si128(transpose1_0, 8));
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tmp_2 = _mm_cvtepu8_epi16(transpose1_1);
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tmp_3 = _mm_cvtepu8_epi16(_mm_srli_si128(transpose1_1, 8));
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// a00 a10 a20 a30 b00 b10 b20 b30
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// a01 a11 a21 a31 b01 b11 b21 b31
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// a02 a12 a22 a32 b02 b12 b22 b32
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// a03 a13 a23 a33 b03 b13 b23 b33
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}
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// Horizontal pass and subsequent transpose.
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{
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// Calculate a and b (two 4x4 at once).
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const __m128i a0 = _mm_add_epi16(tmp_0, tmp_2);
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const __m128i a1 = _mm_add_epi16(tmp_1, tmp_3);
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const __m128i a2 = _mm_sub_epi16(tmp_1, tmp_3);
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const __m128i a3 = _mm_sub_epi16(tmp_0, tmp_2);
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const __m128i b0 = _mm_add_epi16(a0, a1);
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const __m128i b1 = _mm_add_epi16(a3, a2);
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const __m128i b2 = _mm_sub_epi16(a3, a2);
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const __m128i b3 = _mm_sub_epi16(a0, a1);
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// a00 a01 a02 a03 b00 b01 b02 b03
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// a10 a11 a12 a13 b10 b11 b12 b13
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// a20 a21 a22 a23 b20 b21 b22 b23
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// a30 a31 a32 a33 b30 b31 b32 b33
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// Transpose the two 4x4.
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const __m128i transpose0_0 = _mm_unpacklo_epi16(b0, b1);
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const __m128i transpose0_1 = _mm_unpacklo_epi16(b2, b3);
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const __m128i transpose0_2 = _mm_unpackhi_epi16(b0, b1);
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const __m128i transpose0_3 = _mm_unpackhi_epi16(b2, b3);
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// a00 a10 a01 a11 a02 a12 a03 a13
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// a20 a30 a21 a31 a22 a32 a23 a33
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// b00 b10 b01 b11 b02 b12 b03 b13
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// b20 b30 b21 b31 b22 b32 b23 b33
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const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1);
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const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3);
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const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1);
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const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3);
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// a00 a10 a20 a30 a01 a11 a21 a31
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// b00 b10 b20 b30 b01 b11 b21 b31
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// a02 a12 a22 a32 a03 a13 a23 a33
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// b02 b12 a22 b32 b03 b13 b23 b33
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tmp_0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1);
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tmp_1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1);
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tmp_2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3);
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tmp_3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3);
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// a00 a10 a20 a30 b00 b10 b20 b30
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// a01 a11 a21 a31 b01 b11 b21 b31
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// a02 a12 a22 a32 b02 b12 b22 b32
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// a03 a13 a23 a33 b03 b13 b23 b33
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}
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// Vertical pass and difference of weighted sums.
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{
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// Load all inputs.
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const __m128i w_0 = _mm_loadu_si128((const __m128i*)&w[0]);
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const __m128i w_8 = _mm_loadu_si128((const __m128i*)&w[8]);
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// Calculate a and b (two 4x4 at once).
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const __m128i a0 = _mm_add_epi16(tmp_0, tmp_2);
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const __m128i a1 = _mm_add_epi16(tmp_1, tmp_3);
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const __m128i a2 = _mm_sub_epi16(tmp_1, tmp_3);
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const __m128i a3 = _mm_sub_epi16(tmp_0, tmp_2);
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const __m128i b0 = _mm_add_epi16(a0, a1);
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const __m128i b1 = _mm_add_epi16(a3, a2);
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const __m128i b2 = _mm_sub_epi16(a3, a2);
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const __m128i b3 = _mm_sub_epi16(a0, a1);
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// Separate the transforms of inA and inB.
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__m128i A_b0 = _mm_unpacklo_epi64(b0, b1);
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__m128i A_b2 = _mm_unpacklo_epi64(b2, b3);
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__m128i B_b0 = _mm_unpackhi_epi64(b0, b1);
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__m128i B_b2 = _mm_unpackhi_epi64(b2, b3);
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A_b0 = _mm_abs_epi16(A_b0);
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A_b2 = _mm_abs_epi16(A_b2);
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B_b0 = _mm_abs_epi16(B_b0);
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B_b2 = _mm_abs_epi16(B_b2);
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// weighted sums
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A_b0 = _mm_madd_epi16(A_b0, w_0);
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A_b2 = _mm_madd_epi16(A_b2, w_8);
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B_b0 = _mm_madd_epi16(B_b0, w_0);
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B_b2 = _mm_madd_epi16(B_b2, w_8);
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A_b0 = _mm_add_epi32(A_b0, A_b2);
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B_b0 = _mm_add_epi32(B_b0, B_b2);
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// difference of weighted sums
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A_b2 = _mm_sub_epi32(A_b0, B_b0);
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// cascading summation of the differences
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B_b0 = _mm_hadd_epi32(A_b2, A_b2);
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B_b2 = _mm_hadd_epi32(B_b0, B_b0);
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return _mm_cvtsi128_si32(B_b2);
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}
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}
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static int Disto4x4(const uint8_t* const a, const uint8_t* const b,
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const uint16_t* const w) {
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const int diff_sum = TTransform(a, b, w);
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return abs(diff_sum) >> 5;
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}
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static int Disto16x16(const uint8_t* const a, const uint8_t* const b,
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const uint16_t* const w) {
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int D = 0;
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int x, y;
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for (y = 0; y < 16 * BPS; y += 4 * BPS) {
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for (x = 0; x < 16; x += 4) {
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D += Disto4x4(a + x + y, b + x + y, w);
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}
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}
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return D;
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}
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//------------------------------------------------------------------------------
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// Quantization
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//
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@ -253,6 +414,8 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitSSE41(void) {
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VP8EncQuantizeBlockWHT = QuantizeBlockWHT;
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VP8SSE16x16 = SSE16x16;
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VP8SSE16x8 = SSE16x8;
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VP8TDisto4x4 = Disto4x4;
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VP8TDisto16x16 = Disto16x16;
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}
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#else // !WEBP_USE_SSE41
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