/*
 *  Copyright (c) 2017 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.
 */

#include <assert.h>
#if defined(_MSC_VER)
#include <intrin.h>
#endif
#include <immintrin.h>

#include "./vpx_dsp_rtcd.h"
#include "vpx/vpx_integer.h"
#include "vpx_dsp/x86/bitdepth_conversion_sse2.h"
#include "vpx_dsp/x86/quantize_sse2.h"
#include "vpx_dsp/x86/quantize_ssse3.h"
#include "vp9/common/vp9_scan.h"
#include "vp9/encoder/vp9_block.h"

void vpx_quantize_b_avx(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
                        const struct macroblock_plane *const mb_plane,
                        tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
                        const int16_t *dequant_ptr, uint16_t *eob_ptr,
                        const struct ScanOrder *const scan_order) {
  const __m128i zero = _mm_setzero_si128();
  const __m256i big_zero = _mm256_setzero_si256();
  int index;
  const int16_t *iscan = scan_order->iscan;

  __m128i zbin, round, quant, dequant, shift;
  __m128i coeff0, coeff1;
  __m128i qcoeff0, qcoeff1;
  __m128i cmp_mask0, cmp_mask1;
  __m128i all_zero;
  __m128i eob = zero, eob0;

  *eob_ptr = 0;

  load_b_values(mb_plane, &zbin, &round, &quant, dequant_ptr, &dequant, &shift);

  // Do DC and first 15 AC.
  coeff0 = load_tran_low(coeff_ptr);
  coeff1 = load_tran_low(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);  // Switch DC to AC
  cmp_mask1 = _mm_cmpgt_epi16(qcoeff1, zbin);

  all_zero = _mm_or_si128(cmp_mask0, cmp_mask1);
  if (_mm_test_all_zeros(all_zero, all_zero)) {
    _mm256_store_si256((__m256i *)(qcoeff_ptr), big_zero);
    _mm256_store_si256((__m256i *)(dqcoeff_ptr), big_zero);
#if CONFIG_VP9_HIGHBITDEPTH
    _mm256_store_si256((__m256i *)(qcoeff_ptr + 8), big_zero);
    _mm256_store_si256((__m256i *)(dqcoeff_ptr + 8), big_zero);
#endif  // CONFIG_VP9_HIGHBITDEPTH

    if (n_coeffs == 16) return;

    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(&qcoeff0, round, quant, shift);
    round = _mm_unpackhi_epi64(round, round);
    quant = _mm_unpackhi_epi64(quant, quant);
    shift = _mm_unpackhi_epi64(shift, shift);
    calculate_qcoeff(&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_tran_low(qcoeff0, qcoeff_ptr);
    store_tran_low(qcoeff1, qcoeff_ptr + 8);

    calculate_dqcoeff_and_store(qcoeff0, dequant, dqcoeff_ptr);
    dequant = _mm_unpackhi_epi64(dequant, dequant);
    calculate_dqcoeff_and_store(qcoeff1, dequant, dqcoeff_ptr + 8);

    eob = scan_for_eob(&qcoeff0, &qcoeff1, iscan, 0, zero);
  }

  // AC only loop.
  for (index = 16; index < n_coeffs; index += 16) {
    coeff0 = load_tran_low(coeff_ptr + index);
    coeff1 = load_tran_low(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_test_all_zeros(all_zero, all_zero)) {
      _mm256_store_si256((__m256i *)(qcoeff_ptr + index), big_zero);
      _mm256_store_si256((__m256i *)(dqcoeff_ptr + index), big_zero);
#if CONFIG_VP9_HIGHBITDEPTH
      _mm256_store_si256((__m256i *)(qcoeff_ptr + index + 8), big_zero);
      _mm256_store_si256((__m256i *)(dqcoeff_ptr + index + 8), big_zero);
#endif  // CONFIG_VP9_HIGHBITDEPTH
      continue;
    }

    calculate_qcoeff(&qcoeff0, round, quant, shift);
    calculate_qcoeff(&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_tran_low(qcoeff0, qcoeff_ptr + index);
    store_tran_low(qcoeff1, qcoeff_ptr + index + 8);

    calculate_dqcoeff_and_store(qcoeff0, dequant, dqcoeff_ptr + index);
    calculate_dqcoeff_and_store(qcoeff1, dequant, dqcoeff_ptr + index + 8);

    eob0 = scan_for_eob(&qcoeff0, &qcoeff1, iscan, index, zero);
    eob = _mm_max_epi16(eob, eob0);
  }

  *eob_ptr = accumulate_eob(eob);
}

void vpx_quantize_b_32x32_avx(const tran_low_t *coeff_ptr,
                              const struct macroblock_plane *const mb_plane,
                              tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
                              const int16_t *dequant_ptr, uint16_t *eob_ptr,
                              const struct ScanOrder *const scan_order) {
  const __m128i zero = _mm_setzero_si128();
  const __m256i big_zero = _mm256_setzero_si256();
  int index;
  const int16_t *iscan = scan_order->iscan;

  __m128i zbin, round, quant, dequant, shift;
  __m128i coeff0, coeff1;
  __m128i qcoeff0, qcoeff1;
  __m128i cmp_mask0, cmp_mask1;
  __m128i all_zero;
  __m128i eob = zero, eob0;

  load_b_values32x32(mb_plane, &zbin, &round, &quant, dequant_ptr, &dequant,
                     &shift);

  // Do DC and first 15 AC.
  coeff0 = load_tran_low(coeff_ptr);
  coeff1 = load_tran_low(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);  // Switch DC to AC.
  cmp_mask1 = _mm_cmpgt_epi16(qcoeff1, zbin);

  all_zero = _mm_or_si128(cmp_mask0, cmp_mask1);
  if (_mm_test_all_zeros(all_zero, all_zero)) {
    _mm256_store_si256((__m256i *)(qcoeff_ptr), big_zero);
    _mm256_store_si256((__m256i *)(dqcoeff_ptr), big_zero);
#if CONFIG_VP9_HIGHBITDEPTH
    _mm256_store_si256((__m256i *)(qcoeff_ptr + 8), big_zero);
    _mm256_store_si256((__m256i *)(dqcoeff_ptr + 8), big_zero);
#endif  // CONFIG_VP9_HIGHBITDEPTH

    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(&qcoeff0, round, quant, shift);
    round = _mm_unpackhi_epi64(round, round);
    quant = _mm_unpackhi_epi64(quant, quant);
    shift = _mm_unpackhi_epi64(shift, shift);
    calculate_qcoeff(&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_tran_low(qcoeff0, qcoeff_ptr);
    store_tran_low(qcoeff1, qcoeff_ptr + 8);

    calculate_dqcoeff_and_store_32x32(qcoeff0, dequant, zero, dqcoeff_ptr);
    dequant = _mm_unpackhi_epi64(dequant, dequant);
    calculate_dqcoeff_and_store_32x32(qcoeff1, dequant, zero, dqcoeff_ptr + 8);

    eob = scan_for_eob(&qcoeff0, &qcoeff1, iscan, 0, zero);
  }

  // AC only loop.
  for (index = 16; index < 32 * 32; index += 16) {
    coeff0 = load_tran_low(coeff_ptr + index);
    coeff1 = load_tran_low(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_test_all_zeros(all_zero, all_zero)) {
      _mm256_store_si256((__m256i *)(qcoeff_ptr + index), big_zero);
      _mm256_store_si256((__m256i *)(dqcoeff_ptr + index), big_zero);
#if CONFIG_VP9_HIGHBITDEPTH
      _mm256_store_si256((__m256i *)(qcoeff_ptr + index + 8), big_zero);
      _mm256_store_si256((__m256i *)(dqcoeff_ptr + index + 8), big_zero);
#endif  // CONFIG_VP9_HIGHBITDEPTH
      continue;
    }

    calculate_qcoeff(&qcoeff0, round, quant, shift);
    calculate_qcoeff(&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_tran_low(qcoeff0, qcoeff_ptr + index);
    store_tran_low(qcoeff1, qcoeff_ptr + index + 8);

    calculate_dqcoeff_and_store_32x32(qcoeff0, dequant, zero,
                                      dqcoeff_ptr + index);
    calculate_dqcoeff_and_store_32x32(qcoeff1, dequant, zero,
                                      dqcoeff_ptr + index + 8);

    eob0 = scan_for_eob(&qcoeff0, &qcoeff1, iscan, index, zero);
    eob = _mm_max_epi16(eob, eob0);
  }

  *eob_ptr = accumulate_eob(eob);
}