libvpx/vpx_dsp/x86/inv_txfm_sse2.h

/*
 *  Copyright (c) 2015 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.
 */

#ifndef VPX_DSP_X86_INV_TXFM_SSE2_H_
#define VPX_DSP_X86_INV_TXFM_SSE2_H_

#include <emmintrin.h>  // SSE2
#include "./vpx_config.h"
#include "vpx/vpx_integer.h"
#include "vpx_dsp/inv_txfm.h"
#include "vpx_dsp/x86/txfm_common_sse2.h"

// perform 8x8 transpose
static INLINE void array_transpose_8x8(__m128i *in, __m128i *res) {
  const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);
  const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);
  const __m128i tr0_2 = _mm_unpackhi_epi16(in[0], in[1]);
  const __m128i tr0_3 = _mm_unpackhi_epi16(in[2], in[3]);
  const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);
  const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);
  const __m128i tr0_6 = _mm_unpackhi_epi16(in[4], in[5]);
  const __m128i tr0_7 = _mm_unpackhi_epi16(in[6], in[7]);

  const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
  const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_4, tr0_5);
  const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
  const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_4, tr0_5);
  const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_2, tr0_3);
  const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);
  const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_2, tr0_3);
  const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

  res[0] = _mm_unpacklo_epi64(tr1_0, tr1_1);
  res[1] = _mm_unpackhi_epi64(tr1_0, tr1_1);
  res[2] = _mm_unpacklo_epi64(tr1_2, tr1_3);
  res[3] = _mm_unpackhi_epi64(tr1_2, tr1_3);
  res[4] = _mm_unpacklo_epi64(tr1_4, tr1_5);
  res[5] = _mm_unpackhi_epi64(tr1_4, tr1_5);
  res[6] = _mm_unpacklo_epi64(tr1_6, tr1_7);
  res[7] = _mm_unpackhi_epi64(tr1_6, tr1_7);
}
#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_epi16(in0, in1);                   \
    const __m128i tr0_1 = _mm_unpacklo_epi16(in2, in3);                   \
    const __m128i tr0_2 = _mm_unpackhi_epi16(in0, in1);                   \
    const __m128i tr0_3 = _mm_unpackhi_epi16(in2, in3);                   \
    const __m128i tr0_4 = _mm_unpacklo_epi16(in4, in5);                   \
    const __m128i tr0_5 = _mm_unpacklo_epi16(in6, in7);                   \
    const __m128i tr0_6 = _mm_unpackhi_epi16(in4, in5);                   \
    const __m128i tr0_7 = _mm_unpackhi_epi16(in6, in7);                   \
                                                                          \
    const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);               \
    const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);               \
    const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);               \
    const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);               \
    const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);               \
    const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);               \
    const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);               \
    const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);               \
                                                                          \
    out0 = _mm_unpacklo_epi64(tr1_0, tr1_4);                              \
    out1 = _mm_unpackhi_epi64(tr1_0, tr1_4);                              \
    out2 = _mm_unpacklo_epi64(tr1_2, tr1_6);                              \
    out3 = _mm_unpackhi_epi64(tr1_2, tr1_6);                              \
    out4 = _mm_unpacklo_epi64(tr1_1, tr1_5);                              \
    out5 = _mm_unpackhi_epi64(tr1_1, tr1_5);                              \
    out6 = _mm_unpacklo_epi64(tr1_3, tr1_7);                              \
    out7 = _mm_unpackhi_epi64(tr1_3, tr1_7);                              \
  }

#define TRANSPOSE_8X4(in0, in1, in2, in3, out0, out1)   \
  {                                                     \
    const __m128i tr0_0 = _mm_unpacklo_epi16(in0, in1); \
    const __m128i tr0_1 = _mm_unpacklo_epi16(in2, in3); \
                                                        \
    in0 = _mm_unpacklo_epi32(tr0_0, tr0_1); /* i1 i0 */ \
    in1 = _mm_unpackhi_epi32(tr0_0, tr0_1); /* i3 i2 */ \
  }

static INLINE void array_transpose_4X8(__m128i *in, __m128i *out) {
  const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);
  const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);
  const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);
  const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);

  const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
  const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
  const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);
  const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);

  out[0] = _mm_unpacklo_epi64(tr1_0, tr1_4);
  out[1] = _mm_unpackhi_epi64(tr1_0, tr1_4);
  out[2] = _mm_unpacklo_epi64(tr1_2, tr1_6);
  out[3] = _mm_unpackhi_epi64(tr1_2, tr1_6);
}

static INLINE void array_transpose_16x16(__m128i *res0, __m128i *res1) {
  __m128i tbuf[8];
  array_transpose_8x8(res0, res0);
  array_transpose_8x8(res1, tbuf);
  array_transpose_8x8(res0 + 8, res1);
  array_transpose_8x8(res1 + 8, res1 + 8);

  res0[8] = tbuf[0];
  res0[9] = tbuf[1];
  res0[10] = tbuf[2];
  res0[11] = tbuf[3];
  res0[12] = tbuf[4];
  res0[13] = tbuf[5];
  res0[14] = tbuf[6];
  res0[15] = tbuf[7];
}

// Function to allow 8 bit optimisations to be used when profile 0 is used with
// highbitdepth enabled
static INLINE __m128i load_input_data(const tran_low_t *data) {
#if CONFIG_VP9_HIGHBITDEPTH
  return octa_set_epi16(data[0], data[1], data[2], data[3], data[4], data[5],
                        data[6], data[7]);
#else
  return _mm_load_si128((const __m128i *)data);
#endif
}

static INLINE void load_buffer_8x16(const tran_low_t *input, __m128i *in) {
  in[0] = load_input_data(input + 0 * 16);
  in[1] = load_input_data(input + 1 * 16);
  in[2] = load_input_data(input + 2 * 16);
  in[3] = load_input_data(input + 3 * 16);
  in[4] = load_input_data(input + 4 * 16);
  in[5] = load_input_data(input + 5 * 16);
  in[6] = load_input_data(input + 6 * 16);
  in[7] = load_input_data(input + 7 * 16);

  in[8] = load_input_data(input + 8 * 16);
  in[9] = load_input_data(input + 9 * 16);
  in[10] = load_input_data(input + 10 * 16);
  in[11] = load_input_data(input + 11 * 16);
  in[12] = load_input_data(input + 12 * 16);
  in[13] = load_input_data(input + 13 * 16);
  in[14] = load_input_data(input + 14 * 16);
  in[15] = load_input_data(input + 15 * 16);
}

#define RECON_AND_STORE(dest, in_x)                  \
  {                                                  \
    __m128i d0 = _mm_loadl_epi64((__m128i *)(dest)); \
    d0 = _mm_unpacklo_epi8(d0, zero);                \
    d0 = _mm_add_epi16(in_x, d0);                    \
    d0 = _mm_packus_epi16(d0, d0);                   \
    _mm_storel_epi64((__m128i *)(dest), d0);         \
  }

static INLINE void write_buffer_8x16(uint8_t *dest, __m128i *in, int stride) {
  const __m128i final_rounding = _mm_set1_epi16(1 << 5);
  const __m128i zero = _mm_setzero_si128();
  // Final rounding and shift
  in[0] = _mm_adds_epi16(in[0], final_rounding);
  in[1] = _mm_adds_epi16(in[1], final_rounding);
  in[2] = _mm_adds_epi16(in[2], final_rounding);
  in[3] = _mm_adds_epi16(in[3], final_rounding);
  in[4] = _mm_adds_epi16(in[4], final_rounding);
  in[5] = _mm_adds_epi16(in[5], final_rounding);
  in[6] = _mm_adds_epi16(in[6], final_rounding);
  in[7] = _mm_adds_epi16(in[7], final_rounding);
  in[8] = _mm_adds_epi16(in[8], final_rounding);
  in[9] = _mm_adds_epi16(in[9], final_rounding);
  in[10] = _mm_adds_epi16(in[10], final_rounding);
  in[11] = _mm_adds_epi16(in[11], final_rounding);
  in[12] = _mm_adds_epi16(in[12], final_rounding);
  in[13] = _mm_adds_epi16(in[13], final_rounding);
  in[14] = _mm_adds_epi16(in[14], final_rounding);
  in[15] = _mm_adds_epi16(in[15], final_rounding);

  in[0] = _mm_srai_epi16(in[0], 6);
  in[1] = _mm_srai_epi16(in[1], 6);
  in[2] = _mm_srai_epi16(in[2], 6);
  in[3] = _mm_srai_epi16(in[3], 6);
  in[4] = _mm_srai_epi16(in[4], 6);
  in[5] = _mm_srai_epi16(in[5], 6);
  in[6] = _mm_srai_epi16(in[6], 6);
  in[7] = _mm_srai_epi16(in[7], 6);
  in[8] = _mm_srai_epi16(in[8], 6);
  in[9] = _mm_srai_epi16(in[9], 6);
  in[10] = _mm_srai_epi16(in[10], 6);
  in[11] = _mm_srai_epi16(in[11], 6);
  in[12] = _mm_srai_epi16(in[12], 6);
  in[13] = _mm_srai_epi16(in[13], 6);
  in[14] = _mm_srai_epi16(in[14], 6);
  in[15] = _mm_srai_epi16(in[15], 6);

  RECON_AND_STORE(dest + 0 * stride, in[0]);
  RECON_AND_STORE(dest + 1 * stride, in[1]);
  RECON_AND_STORE(dest + 2 * stride, in[2]);
  RECON_AND_STORE(dest + 3 * stride, in[3]);
  RECON_AND_STORE(dest + 4 * stride, in[4]);
  RECON_AND_STORE(dest + 5 * stride, in[5]);
  RECON_AND_STORE(dest + 6 * stride, in[6]);
  RECON_AND_STORE(dest + 7 * stride, in[7]);
  RECON_AND_STORE(dest + 8 * stride, in[8]);
  RECON_AND_STORE(dest + 9 * stride, in[9]);
  RECON_AND_STORE(dest + 10 * stride, in[10]);
  RECON_AND_STORE(dest + 11 * stride, in[11]);
  RECON_AND_STORE(dest + 12 * stride, in[12]);
  RECON_AND_STORE(dest + 13 * stride, in[13]);
  RECON_AND_STORE(dest + 14 * stride, in[14]);
  RECON_AND_STORE(dest + 15 * stride, in[15]);
}

#define TRANSPOSE_4X8_10(tmp0, tmp1, tmp2, tmp3, out0, out1, out2, out3) \
  {                                                                      \
    const __m128i tr0_0 = _mm_unpackhi_epi16(tmp0, tmp1);                \
    const __m128i tr0_1 = _mm_unpacklo_epi16(tmp1, tmp0);                \
    const __m128i tr0_4 = _mm_unpacklo_epi16(tmp2, tmp3);                \
    const __m128i tr0_5 = _mm_unpackhi_epi16(tmp3, tmp2);                \
                                                                         \
    const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);              \
    const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);              \
    const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);              \
    const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);              \
                                                                         \
    out0 = _mm_unpacklo_epi64(tr1_0, tr1_4);                             \
    out1 = _mm_unpackhi_epi64(tr1_0, tr1_4);                             \
    out2 = _mm_unpacklo_epi64(tr1_2, tr1_6);                             \
    out3 = _mm_unpackhi_epi64(tr1_2, tr1_6);                             \
  }

#define TRANSPOSE_8X8_10(in0, in1, in2, in3, out0, out1) \
  {                                                      \
    const __m128i tr0_0 = _mm_unpacklo_epi16(in0, in1);  \
    const __m128i tr0_1 = _mm_unpacklo_epi16(in2, in3);  \
    out0 = _mm_unpacklo_epi32(tr0_0, tr0_1);             \
    out1 = _mm_unpackhi_epi32(tr0_0, tr0_1);             \
  }

// Define Macro for multiplying elements by constants and adding them together.
#define MULTIPLICATION_AND_ADD(lo_0, hi_0, lo_1, hi_1, cst0, cst1, cst2, cst3, \
                               res0, res1, res2, res3)                         \
  {                                                                            \
    tmp0 = _mm_madd_epi16(lo_0, cst0);                                         \
    tmp1 = _mm_madd_epi16(hi_0, cst0);                                         \
    tmp2 = _mm_madd_epi16(lo_0, cst1);                                         \
    tmp3 = _mm_madd_epi16(hi_0, cst1);                                         \
    tmp4 = _mm_madd_epi16(lo_1, cst2);                                         \
    tmp5 = _mm_madd_epi16(hi_1, cst2);                                         \
    tmp6 = _mm_madd_epi16(lo_1, cst3);                                         \
    tmp7 = _mm_madd_epi16(hi_1, cst3);                                         \
                                                                               \
    tmp0 = _mm_add_epi32(tmp0, rounding);                                      \
    tmp1 = _mm_add_epi32(tmp1, rounding);                                      \
    tmp2 = _mm_add_epi32(tmp2, rounding);                                      \
    tmp3 = _mm_add_epi32(tmp3, rounding);                                      \
    tmp4 = _mm_add_epi32(tmp4, rounding);                                      \
    tmp5 = _mm_add_epi32(tmp5, rounding);                                      \
    tmp6 = _mm_add_epi32(tmp6, rounding);                                      \
    tmp7 = _mm_add_epi32(tmp7, rounding);                                      \
                                                                               \
    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);                               \
    tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS);                               \
    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);                               \
    tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS);                               \
    tmp4 = _mm_srai_epi32(tmp4, DCT_CONST_BITS);                               \
    tmp5 = _mm_srai_epi32(tmp5, DCT_CONST_BITS);                               \
    tmp6 = _mm_srai_epi32(tmp6, DCT_CONST_BITS);                               \
    tmp7 = _mm_srai_epi32(tmp7, DCT_CONST_BITS);                               \
                                                                               \
    res0 = _mm_packs_epi32(tmp0, tmp1);                                        \
    res1 = _mm_packs_epi32(tmp2, tmp3);                                        \
    res2 = _mm_packs_epi32(tmp4, tmp5);                                        \
    res3 = _mm_packs_epi32(tmp6, tmp7);                                        \
  }

static INLINE void recon_and_store4x4_sse2(const __m128i *const in,
                                           uint8_t *const dest,
                                           const int stride) {
  const __m128i zero = _mm_setzero_si128();
  __m128i d[2];

  // Reconstruction and Store
  d[0] = _mm_cvtsi32_si128(*(const int *)(dest));
  d[1] = _mm_cvtsi32_si128(*(const int *)(dest + stride * 3));
  d[0] = _mm_unpacklo_epi32(d[0],
                            _mm_cvtsi32_si128(*(const int *)(dest + stride)));
  d[1] = _mm_unpacklo_epi32(
      _mm_cvtsi32_si128(*(const int *)(dest + stride * 2)), d[1]);
  d[0] = _mm_unpacklo_epi8(d[0], zero);
  d[1] = _mm_unpacklo_epi8(d[1], zero);
  d[0] = _mm_add_epi16(d[0], in[0]);
  d[1] = _mm_add_epi16(d[1], in[1]);
  d[0] = _mm_packus_epi16(d[0], d[1]);

  *(int *)dest = _mm_cvtsi128_si32(d[0]);
  d[0] = _mm_srli_si128(d[0], 4);
  *(int *)(dest + stride) = _mm_cvtsi128_si32(d[0]);
  d[0] = _mm_srli_si128(d[0], 4);
  *(int *)(dest + stride * 2) = _mm_cvtsi128_si32(d[0]);
  d[0] = _mm_srli_si128(d[0], 4);
  *(int *)(dest + stride * 3) = _mm_cvtsi128_si32(d[0]);
}

void idct4_sse2(__m128i *in);
void idct8_sse2(__m128i *in);
void idct16_sse2(__m128i *in0, __m128i *in1);
void iadst4_sse2(__m128i *in);
void iadst8_sse2(__m128i *in);
void iadst16_sse2(__m128i *in0, __m128i *in1);

#endif  // VPX_DSP_X86_INV_TXFM_SSE2_H_