/*

 *  Copyright (c) 2014 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>

#include <emmintrin.h>

#include <xmmintrin.h>

#include "./vp9_rtcd.h"

#include "vpx/vpx_integer.h"

#include "vpx_dsp/vpx_dsp_common.h"

#include "vpx_dsp/x86/bitdepth_conversion_sse2.h"

#include "vpx_dsp/x86/quantize_sse2.h"

#include "vp9/common/vp9_scan.h"

#include "vp9/encoder/vp9_block.h"

void vp9_quantize_fp_sse2(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();

  __m128i thr;

  int nzflag;

  int index = 16;

  __m128i round, quant, dequant;

  __m128i coeff0, coeff1, coeff0_sign, coeff1_sign;

  __m128i qcoeff0, qcoeff1;

  __m128i eob;

  const int16_t *iscan = scan_order->iscan;

  // Setup global values.

  load_fp_values(mb_plane, &round, &quant, dequant_ptr, &dequant);

  // Do DC and first 15 AC.

  coeff0 = load_tran_low(coeff_ptr);

  coeff1 = load_tran_low(coeff_ptr + 8);

  // Poor man's abs().

  coeff0_sign = _mm_srai_epi16(coeff0, 15);

  coeff1_sign = _mm_srai_epi16(coeff1, 15);

  qcoeff0 = invert_sign_sse2(coeff0, coeff0_sign);

  qcoeff1 = invert_sign_sse2(coeff1, coeff1_sign);

  qcoeff0 = _mm_adds_epi16(qcoeff0, round);

  qcoeff0 = _mm_mulhi_epi16(qcoeff0, quant);

  round = _mm_unpackhi_epi64(round, round);

  quant = _mm_unpackhi_epi64(quant, quant);

  qcoeff1 = _mm_adds_epi16(qcoeff1, round);

  qcoeff1 = _mm_mulhi_epi16(qcoeff1, quant);

  // Reinsert signs.

  qcoeff0 = invert_sign_sse2(qcoeff0, coeff0_sign);

  qcoeff1 = invert_sign_sse2(qcoeff1, coeff1_sign);

  store_tran_low(qcoeff0, qcoeff_ptr);

  store_tran_low(qcoeff1, qcoeff_ptr + 8);

  qcoeff0 = _mm_mullo_epi16(qcoeff0, dequant);

  dequant = _mm_unpackhi_epi64(dequant, dequant);

  qcoeff1 = _mm_mullo_epi16(qcoeff1, dequant);

  store_tran_low(qcoeff0, dqcoeff_ptr);

  store_tran_low(qcoeff1, dqcoeff_ptr + 8);

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

  thr = _mm_srai_epi16(dequant, 1);

  // AC only loop.

  while (index < n_coeffs) {

    coeff0 = load_tran_low(coeff_ptr + index);

    coeff1 = load_tran_low(coeff_ptr + index + 8);

    // Poor man's abs().

    coeff0_sign = _mm_srai_epi16(coeff0, 15);

    coeff1_sign = _mm_srai_epi16(coeff1, 15);

    qcoeff0 = invert_sign_sse2(coeff0, coeff0_sign);

    qcoeff1 = invert_sign_sse2(coeff1, coeff1_sign);

    nzflag = _mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff0, thr)) |

             _mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff1, thr));

    if (nzflag) {

      __m128i eob0;

      qcoeff0 = _mm_adds_epi16(qcoeff0, round);

      qcoeff1 = _mm_adds_epi16(qcoeff1, round);

      qcoeff0 = _mm_mulhi_epi16(qcoeff0, quant);

      qcoeff1 = _mm_mulhi_epi16(qcoeff1, quant);

      // Reinsert signs.

      qcoeff0 = invert_sign_sse2(qcoeff0, coeff0_sign);

      qcoeff1 = invert_sign_sse2(qcoeff1, coeff1_sign);

      store_tran_low(qcoeff0, qcoeff_ptr + index);

      store_tran_low(qcoeff1, qcoeff_ptr + index + 8);

      qcoeff0 = _mm_mullo_epi16(qcoeff0, dequant);

      qcoeff1 = _mm_mullo_epi16(qcoeff1, dequant);

      store_tran_low(qcoeff0, dqcoeff_ptr + index);

      store_tran_low(qcoeff1, dqcoeff_ptr + index + 8);

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

      eob = _mm_max_epi16(eob, eob0);

    } else {

      store_zero_tran_low(qcoeff_ptr + index);

      store_zero_tran_low(qcoeff_ptr + index + 8);

      store_zero_tran_low(dqcoeff_ptr + index);

      store_zero_tran_low(dqcoeff_ptr + index + 8);

    }

    index += 16;

  }

  *eob_ptr = accumulate_eob(eob);

}