| // Copyright 2016 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 code common to several files. |
| // |
| // Author: Vincent Rabaud (vrabaud@google.com) |
| |
| #ifndef WEBP_DSP_COMMON_SSE2_H_ |
| #define WEBP_DSP_COMMON_SSE2_H_ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #if defined(WEBP_USE_SSE2) |
| |
| #include <emmintrin.h> |
| |
| //------------------------------------------------------------------------------ |
| // Quite useful macro for debugging. Left here for convenience. |
| |
| #if 0 |
| #include <stdio.h> |
| static WEBP_INLINE void PrintReg(const __m128i r, const char* const name, |
| int size) { |
| int n; |
| union { |
| __m128i r; |
| uint8_t i8[16]; |
| uint16_t i16[8]; |
| uint32_t i32[4]; |
| uint64_t i64[2]; |
| } tmp; |
| tmp.r = r; |
| fprintf(stderr, "%s\t: ", name); |
| if (size == 8) { |
| for (n = 0; n < 16; ++n) fprintf(stderr, "%.2x ", tmp.i8[n]); |
| } else if (size == 16) { |
| for (n = 0; n < 8; ++n) fprintf(stderr, "%.4x ", tmp.i16[n]); |
| } else if (size == 32) { |
| for (n = 0; n < 4; ++n) fprintf(stderr, "%.8x ", tmp.i32[n]); |
| } else { |
| for (n = 0; n < 2; ++n) fprintf(stderr, "%.16lx ", tmp.i64[n]); |
| } |
| fprintf(stderr, "\n"); |
| } |
| #endif |
| |
| //------------------------------------------------------------------------------ |
| // Math functions. |
| |
| // Return the sum of all the 8b in the register. |
| static WEBP_INLINE int VP8HorizontalAdd8b(const __m128i* const a) { |
| const __m128i zero = _mm_setzero_si128(); |
| const __m128i sad8x2 = _mm_sad_epu8(*a, zero); |
| // sum the two sads: sad8x2[0:1] + sad8x2[8:9] |
| const __m128i sum = _mm_add_epi32(sad8x2, _mm_shuffle_epi32(sad8x2, 2)); |
| return _mm_cvtsi128_si32(sum); |
| } |
| |
| // Transpose two 4x4 16b matrices horizontally stored in registers. |
| static WEBP_INLINE void VP8Transpose_2_4x4_16b( |
| const __m128i* const in0, const __m128i* const in1, |
| const __m128i* const in2, const __m128i* const in3, __m128i* const out0, |
| __m128i* const out1, __m128i* const out2, __m128i* const out3) { |
| // 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(*in0, *in1); |
| const __m128i transpose0_1 = _mm_unpacklo_epi16(*in2, *in3); |
| const __m128i transpose0_2 = _mm_unpackhi_epi16(*in0, *in1); |
| const __m128i transpose0_3 = _mm_unpackhi_epi16(*in2, *in3); |
| // 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 |
| *out0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1); |
| *out1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1); |
| *out2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3); |
| *out3 = _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 |
| } |
| |
| //------------------------------------------------------------------------------ |
| // Channel mixing. |
| |
| // Function used several times in VP8PlanarTo24b. |
| // It samples the in buffer as follows: one every two unsigned char is stored |
| // at the beginning of the buffer, while the other half is stored at the end. |
| #define VP8PlanarTo24bHelper(IN, OUT) \ |
| do { \ |
| const __m128i v_mask = _mm_set1_epi16(0x00ff); \ |
| /* Take one every two upper 8b values.*/ \ |
| (OUT##0) = _mm_packus_epi16(_mm_and_si128((IN##0), v_mask), \ |
| _mm_and_si128((IN##1), v_mask)); \ |
| (OUT##1) = _mm_packus_epi16(_mm_and_si128((IN##2), v_mask), \ |
| _mm_and_si128((IN##3), v_mask)); \ |
| (OUT##2) = _mm_packus_epi16(_mm_and_si128((IN##4), v_mask), \ |
| _mm_and_si128((IN##5), v_mask)); \ |
| /* Take one every two lower 8b values.*/ \ |
| (OUT##3) = _mm_packus_epi16(_mm_srli_epi16((IN##0), 8), \ |
| _mm_srli_epi16((IN##1), 8)); \ |
| (OUT##4) = _mm_packus_epi16(_mm_srli_epi16((IN##2), 8), \ |
| _mm_srli_epi16((IN##3), 8)); \ |
| (OUT##5) = _mm_packus_epi16(_mm_srli_epi16((IN##4), 8), \ |
| _mm_srli_epi16((IN##5), 8)); \ |
| } while (0) |
| |
| // Pack the planar buffers |
| // rrrr... rrrr... gggg... gggg... bbbb... bbbb.... |
| // triplet by triplet in the output buffer rgb as rgbrgbrgbrgb ... |
| static WEBP_INLINE void VP8PlanarTo24b_SSE2( |
| __m128i* const in0, __m128i* const in1, __m128i* const in2, |
| __m128i* const in3, __m128i* const in4, __m128i* const in5) { |
| // The input is 6 registers of sixteen 8b but for the sake of explanation, |
| // let's take 6 registers of four 8b values. |
| // To pack, we will keep taking one every two 8b integer and move it |
| // around as follows: |
| // Input: |
| // r0r1r2r3 | r4r5r6r7 | g0g1g2g3 | g4g5g6g7 | b0b1b2b3 | b4b5b6b7 |
| // Split the 6 registers in two sets of 3 registers: the first set as the even |
| // 8b bytes, the second the odd ones: |
| // r0r2r4r6 | g0g2g4g6 | b0b2b4b6 | r1r3r5r7 | g1g3g5g7 | b1b3b5b7 |
| // Repeat the same permutations twice more: |
| // r0r4g0g4 | b0b4r1r5 | g1g5b1b5 | r2r6g2g6 | b2b6r3r7 | g3g7b3b7 |
| // r0g0b0r1 | g1b1r2g2 | b2r3g3b3 | r4g4b4r5 | g5b5r6g6 | b6r7g7b7 |
| __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5; |
| VP8PlanarTo24bHelper(*in, tmp); |
| VP8PlanarTo24bHelper(tmp, *in); |
| VP8PlanarTo24bHelper(*in, tmp); |
| // We need to do it two more times than the example as we have sixteen bytes. |
| { |
| __m128i out0, out1, out2, out3, out4, out5; |
| VP8PlanarTo24bHelper(tmp, out); |
| VP8PlanarTo24bHelper(out, *in); |
| } |
| } |
| |
| #undef VP8PlanarTo24bHelper |
| |
| // Convert four packed four-channel buffers like argbargbargbargb... into the |
| // split channels aaaaa ... rrrr ... gggg .... bbbbb ...... |
| static WEBP_INLINE void VP8L32bToPlanar_SSE2(__m128i* const in0, |
| __m128i* const in1, |
| __m128i* const in2, |
| __m128i* const in3) { |
| // Column-wise transpose. |
| const __m128i A0 = _mm_unpacklo_epi8(*in0, *in1); |
| const __m128i A1 = _mm_unpackhi_epi8(*in0, *in1); |
| const __m128i A2 = _mm_unpacklo_epi8(*in2, *in3); |
| const __m128i A3 = _mm_unpackhi_epi8(*in2, *in3); |
| const __m128i B0 = _mm_unpacklo_epi8(A0, A1); |
| const __m128i B1 = _mm_unpackhi_epi8(A0, A1); |
| const __m128i B2 = _mm_unpacklo_epi8(A2, A3); |
| const __m128i B3 = _mm_unpackhi_epi8(A2, A3); |
| // C0 = g7 g6 ... g1 g0 | b7 b6 ... b1 b0 |
| // C1 = a7 a6 ... a1 a0 | r7 r6 ... r1 r0 |
| const __m128i C0 = _mm_unpacklo_epi8(B0, B1); |
| const __m128i C1 = _mm_unpackhi_epi8(B0, B1); |
| const __m128i C2 = _mm_unpacklo_epi8(B2, B3); |
| const __m128i C3 = _mm_unpackhi_epi8(B2, B3); |
| // Gather the channels. |
| *in0 = _mm_unpackhi_epi64(C1, C3); |
| *in1 = _mm_unpacklo_epi64(C1, C3); |
| *in2 = _mm_unpackhi_epi64(C0, C2); |
| *in3 = _mm_unpacklo_epi64(C0, C2); |
| } |
| |
| #endif // WEBP_USE_SSE2 |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // WEBP_DSP_COMMON_SSE2_H_ |
