/*

 * Copyright (c) 2019, Alliance for Open Media. All rights reserved.

 *

 * This source code is subject to the terms of the BSD 2 Clause License and

 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License

 * was not distributed with this source code in the LICENSE file, you can

 * obtain it at www.aomedia.org/license/software. If the Alliance for Open

 * Media Patent License 1.0 was not distributed with this source code in the

 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.

 */

#include <assert.h>

#include <tmmintrin.h>

#include <emmintrin.h>

#include <xmmintrin.h>

#include "config/aom_dsp_rtcd.h"

#include "aom/aom_integer.h"

#include "aom_dsp/x86/quantize_x86.h"

static inline void calculate_qcoeff_64x64(__m128i *coeff, const __m128i round,

                                          const __m128i quant,

                                          const __m128i *shift) {

  __m128i tmp, qcoeff, tmp1;

  qcoeff = _mm_adds_epi16(*coeff, round);

  tmp = _mm_mulhi_epi16(qcoeff, quant);

  qcoeff = _mm_add_epi16(tmp, qcoeff);

  tmp = _mm_mullo_epi16(qcoeff, *shift);

  tmp = _mm_srli_epi16(tmp, 14);

  tmp1 = _mm_mulhi_epi16(qcoeff, *shift);

  tmp1 = _mm_slli_epi16(tmp1, 2);

  *coeff = _mm_or_si128(tmp, tmp1);

}

static inline void calculate_dqcoeff_and_store_64x64(const __m128i qcoeff,

                                                     const __m128i dequant,

                                                     const __m128i zero,

                                                     tran_low_t *dqcoeff) {

  // Un-sign to bias rounding like C.

  const __m128i coeff = _mm_abs_epi16(qcoeff);

  const __m128i sign_0 = _mm_unpacklo_epi16(zero, qcoeff);

  const __m128i sign_1 = _mm_unpackhi_epi16(zero, qcoeff);

  const __m128i low = _mm_mullo_epi16(coeff, dequant);

  const __m128i high = _mm_mulhi_epi16(coeff, dequant);

  __m128i dqcoeff32_0 = _mm_unpacklo_epi16(low, high);

  __m128i dqcoeff32_1 = _mm_unpackhi_epi16(low, high);

  // "Divide" by 4.

  dqcoeff32_0 = _mm_srli_epi32(dqcoeff32_0, 2);

  dqcoeff32_1 = _mm_srli_epi32(dqcoeff32_1, 2);

  dqcoeff32_0 = _mm_sign_epi32(dqcoeff32_0, sign_0);

  dqcoeff32_1 = _mm_sign_epi32(dqcoeff32_1, sign_1);

  _mm_store_si128((__m128i *)(dqcoeff), dqcoeff32_0);

  _mm_store_si128((__m128i *)(dqcoeff + 4), dqcoeff32_1);

}

void aom_quantize_b_64x64_ssse3(const tran_low_t *coeff_ptr, intptr_t n_coeffs,

                                const int16_t *zbin_ptr,

                                const int16_t *round_ptr,

                                const int16_t *quant_ptr,

                                const int16_t *quant_shift_ptr,

                                tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,

                                const int16_t *dequant_ptr, uint16_t *eob_ptr,

                                const int16_t *scan, const int16_t *iscan) {

  const __m128i zero = _mm_setzero_si128();

  const __m128i one = _mm_set1_epi16(1);

  const __m128i two = _mm_set1_epi16(2);

  int index;

  __m128i zbin, round, quant, dequant, shift;

  __m128i coeff0, coeff1, qcoeff0, qcoeff1;

  __m128i cmp_mask0, cmp_mask1, all_zero;

  __m128i eob = zero, eob0;

  (void)scan;

  (void)n_coeffs;

  // Setup global values.

  zbin = _mm_load_si128((const __m128i *)zbin_ptr);

  round = _mm_load_si128((const __m128i *)round_ptr);

  quant = _mm_load_si128((const __m128i *)quant_ptr);

  dequant = _mm_load_si128((const __m128i *)dequant_ptr);

  shift = _mm_load_si128((const __m128i *)quant_shift_ptr);

  // Shift with rounding.

  zbin = _mm_add_epi16(zbin, two);

  round = _mm_add_epi16(round, two);

  zbin = _mm_srli_epi16(zbin, 2);

  round = _mm_srli_epi16(round, 2);

  zbin = _mm_sub_epi16(zbin, one);

  // Do DC and first 15 AC.

  coeff0 = load_coefficients(coeff_ptr);

  coeff1 = load_coefficients(coeff_ptr + 8);

  qcoeff0 = _mm_abs_epi16(coeff0);

  qcoeff1 = _mm_abs_epi16(coeff1);

  cmp_mask0 = _mm_cmpgt_epi16(qcoeff0, zbin);

  zbin = _mm_unpackhi_epi64(zbin, zbin);

  cmp_mask1 = _mm_cmpgt_epi16(qcoeff1, zbin);

  all_zero = _mm_or_si128(cmp_mask0, cmp_mask1);

  if (_mm_movemask_epi8(all_zero) == 0) {

    _mm_store_si128((__m128i *)(qcoeff_ptr), zero);

    _mm_store_si128((__m128i *)(qcoeff_ptr + 4), zero);

    _mm_store_si128((__m128i *)(qcoeff_ptr + 8), zero);

    _mm_store_si128((__m128i *)(qcoeff_ptr + 12), zero);

    _mm_store_si128((__m128i *)(dqcoeff_ptr), zero);

    _mm_store_si128((__m128i *)(dqcoeff_ptr + 4), zero);

    _mm_store_si128((__m128i *)(dqcoeff_ptr + 8), zero);

    _mm_store_si128((__m128i *)(dqcoeff_ptr + 12), zero);

    round = _mm_unpackhi_epi64(round, round);

    quant = _mm_unpackhi_epi64(quant, quant);

    shift = _mm_unpackhi_epi64(shift, shift);

    dequant = _mm_unpackhi_epi64(dequant, dequant);

  } else {

    calculate_qcoeff_64x64(&qcoeff0, round, quant, &shift);

    round = _mm_unpackhi_epi64(round, round);

    quant = _mm_unpackhi_epi64(quant, quant);

    shift = _mm_unpackhi_epi64(shift, shift);

    calculate_qcoeff_64x64(&qcoeff1, round, quant, &shift);

    // Reinsert signs.

    qcoeff0 = _mm_sign_epi16(qcoeff0, coeff0);

    qcoeff1 = _mm_sign_epi16(qcoeff1, coeff1);

    // Mask out zbin threshold coeffs.

    qcoeff0 = _mm_and_si128(qcoeff0, cmp_mask0);

    qcoeff1 = _mm_and_si128(qcoeff1, cmp_mask1);

    store_coefficients(qcoeff0, qcoeff_ptr);

    store_coefficients(qcoeff1, qcoeff_ptr + 8);

    calculate_dqcoeff_and_store_64x64(qcoeff0, dequant, zero, dqcoeff_ptr);

    dequant = _mm_unpackhi_epi64(dequant, dequant);

    calculate_dqcoeff_and_store_64x64(qcoeff1, dequant, zero, dqcoeff_ptr + 8);

    eob =

        scan_for_eob(&qcoeff0, &qcoeff1, cmp_mask0, cmp_mask1, iscan, 0, zero);

  }

  // AC only loop.

  for (index = 16; index < 1024; index += 16) {

    coeff0 = load_coefficients(coeff_ptr + index);

    coeff1 = load_coefficients(coeff_ptr + index + 8);

    qcoeff0 = _mm_abs_epi16(coeff0);

    qcoeff1 = _mm_abs_epi16(coeff1);

    cmp_mask0 = _mm_cmpgt_epi16(qcoeff0, zbin);

    cmp_mask1 = _mm_cmpgt_epi16(qcoeff1, zbin);

    all_zero = _mm_or_si128(cmp_mask0, cmp_mask1);

    if (_mm_movemask_epi8(all_zero) == 0) {

      _mm_store_si128((__m128i *)(qcoeff_ptr + index), zero);

      _mm_store_si128((__m128i *)(qcoeff_ptr + index + 4), zero);

      _mm_store_si128((__m128i *)(qcoeff_ptr + index + 8), zero);

      _mm_store_si128((__m128i *)(qcoeff_ptr + index + 12), zero);

      _mm_store_si128((__m128i *)(dqcoeff_ptr + index), zero);

      _mm_store_si128((__m128i *)(dqcoeff_ptr + index + 4), zero);

      _mm_store_si128((__m128i *)(dqcoeff_ptr + index + 8), zero);

      _mm_store_si128((__m128i *)(dqcoeff_ptr + index + 12), zero);

      continue;

    }

    calculate_qcoeff_64x64(&qcoeff0, round, quant, &shift);

    calculate_qcoeff_64x64(&qcoeff1, round, quant, &shift);

    qcoeff0 = _mm_sign_epi16(qcoeff0, coeff0);

    qcoeff1 = _mm_sign_epi16(qcoeff1, coeff1);

    qcoeff0 = _mm_and_si128(qcoeff0, cmp_mask0);

    qcoeff1 = _mm_and_si128(qcoeff1, cmp_mask1);

    store_coefficients(qcoeff0, qcoeff_ptr + index);

    store_coefficients(qcoeff1, qcoeff_ptr + index + 8);

    calculate_dqcoeff_and_store_64x64(qcoeff0, dequant, zero,

                                      dqcoeff_ptr + index);

    calculate_dqcoeff_and_store_64x64(qcoeff1, dequant, zero,

                                      dqcoeff_ptr + 8 + index);

    eob0 = scan_for_eob(&qcoeff0, &qcoeff1, cmp_mask0, cmp_mask1, iscan, index,

                        zero);

    eob = _mm_max_epi16(eob, eob0);

  }

  *eob_ptr = accumulate_eob(eob);

}