vpx_dsp/x86/highbd_quantize_intrin_avx2.c - platform/external/libvpx - Git at Google

 /*
  *  Copyright (c) 2022 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 <immintrin.h>

 #include "./vpx_dsp_rtcd.h"

 static VPX_FORCE_INLINE void init_one_qp(const __m128i *p, __m256i *qp) {
   const __m128i sign = _mm_srai_epi16(*p, 15);
   const __m128i dc = _mm_unpacklo_epi16(*p, sign);
   const __m128i ac = _mm_unpackhi_epi16(*p, sign);
   *qp = _mm256_insertf128_si256(_mm256_castsi128_si256(dc), ac, 1);
 }

 static VPX_FORCE_INLINE void update_qp(__m256i *qp) {
   int i;
   for (i = 0; i < 5; ++i) {
     qp[i] = _mm256_permute2x128_si256(qp[i], qp[i], 0x11);
   }
 }

 static VPX_FORCE_INLINE void init_qp(const int16_t *zbin_ptr,
                                      const int16_t *round_ptr,
                                      const int16_t *quant_ptr,
                                      const int16_t *dequant_ptr,
                                      const int16_t *quant_shift_ptr,
                                      __m256i *qp, int log_scale) {
   const __m128i zbin = _mm_loadu_si128((const __m128i *)zbin_ptr);
   const __m128i round = _mm_loadu_si128((const __m128i *)round_ptr);
   const __m128i quant = _mm_loadu_si128((const __m128i *)quant_ptr);
   const __m128i dequant = _mm_loadu_si128((const __m128i *)dequant_ptr);
   const __m128i quant_shift = _mm_loadu_si128((const __m128i *)quant_shift_ptr);
   init_one_qp(&zbin, &qp[0]);
   init_one_qp(&round, &qp[1]);
   init_one_qp(&quant, &qp[2]);
   init_one_qp(&dequant, &qp[3]);
   init_one_qp(&quant_shift, &qp[4]);
   if (log_scale > 0) {
     const __m256i rnd = _mm256_set1_epi32((int16_t)(1 << (log_scale - 1)));
     qp[0] = _mm256_add_epi32(qp[0], rnd);
     qp[0] = _mm256_srai_epi32(qp[0], log_scale);

     qp[1] = _mm256_add_epi32(qp[1], rnd);
     qp[1] = _mm256_srai_epi32(qp[1], log_scale);
   }
   // Subtracting 1 here eliminates a _mm256_cmpeq_epi32() instruction when
   // calculating the zbin mask.
   qp[0] = _mm256_sub_epi32(qp[0], _mm256_set1_epi32(1));
 }

 // Note:
 // *x is vector multiplied by *y which is 16 int32_t parallel multiplication
 // and right shift 16.  The output, 16 int32_t is save in *p.
 static VPX_FORCE_INLINE __m256i mm256_mul_shift_epi32(const __m256i *x,
                                                       const __m256i *y) {
   __m256i prod_lo = _mm256_mul_epi32(*x, *y);
   __m256i prod_hi = _mm256_srli_epi64(*x, 32);
   const __m256i mult_hi = _mm256_srli_epi64(*y, 32);
   const __m256i mask = _mm256_set_epi32(0, -1, 0, -1, 0, -1, 0, -1);
   prod_hi = _mm256_mul_epi32(prod_hi, mult_hi);
   prod_lo = _mm256_srli_epi64(prod_lo, 16);
   prod_lo = _mm256_and_si256(prod_lo, mask);
   prod_hi = _mm256_srli_epi64(prod_hi, 16);
   prod_hi = _mm256_slli_epi64(prod_hi, 32);
   return _mm256_or_si256(prod_lo, prod_hi);
 }

 static VPX_FORCE_INLINE __m256i get_max_lane_eob(const int16_t *iscan_ptr,
                                                  __m256i eobmax,
                                                  __m256i nz_mask) {
   const __m256i packed_nz_mask = _mm256_packs_epi32(nz_mask, nz_mask);
   const __m256i packed_nz_mask_perm =
       _mm256_permute4x64_epi64(packed_nz_mask, 0xD8);
   const __m256i iscan =
       _mm256_castsi128_si256(_mm_loadu_si128((const __m128i *)iscan_ptr));
   const __m256i iscan_plus1 = _mm256_sub_epi16(iscan, packed_nz_mask_perm);
   const __m256i nz_iscan = _mm256_and_si256(iscan_plus1, packed_nz_mask_perm);
   return _mm256_max_epi16(eobmax, nz_iscan);
 }

 // Get the max eob from the lower 128 bits.
 static VPX_FORCE_INLINE uint16_t get_max_eob(__m256i eob) {
   __m256i eob_s;
   eob_s = _mm256_shuffle_epi32(eob, 0xe);
   eob = _mm256_max_epi16(eob, eob_s);
   eob_s = _mm256_shufflelo_epi16(eob, 0xe);
   eob = _mm256_max_epi16(eob, eob_s);
   eob_s = _mm256_shufflelo_epi16(eob, 1);
   eob = _mm256_max_epi16(eob, eob_s);
 #if defined(_MSC_VER) && (_MSC_VER < 1910)
   return _mm_cvtsi128_si32(_mm256_extracti128_si256(eob, 0)) & 0xffff;
 #else
   return (uint16_t)_mm256_extract_epi16(eob, 0);
 #endif
 }

 static VPX_FORCE_INLINE void quantize(const __m256i *qp,
                                       const tran_low_t *coeff_ptr,
                                       const int16_t *iscan_ptr,
                                       tran_low_t *qcoeff, tran_low_t *dqcoeff,
                                       __m256i *eob) {
   const __m256i coeff = _mm256_loadu_si256((const __m256i *)coeff_ptr);
   const __m256i abs_coeff = _mm256_abs_epi32(coeff);
   const __m256i zbin_mask = _mm256_cmpgt_epi32(abs_coeff, qp[0]);

   if (_mm256_movemask_epi8(zbin_mask) == 0) {
     const __m256i zero = _mm256_setzero_si256();
     _mm256_storeu_si256((__m256i *)qcoeff, zero);
     _mm256_storeu_si256((__m256i *)dqcoeff, zero);
     return;
   }
   {
     const __m256i tmp_rnd =
         _mm256_and_si256(_mm256_add_epi32(abs_coeff, qp[1]), zbin_mask);
     const __m256i tmp = mm256_mul_shift_epi32(&tmp_rnd, &qp[2]);
     const __m256i tmp2 = _mm256_add_epi32(tmp, tmp_rnd);
     const __m256i abs_q = mm256_mul_shift_epi32(&tmp2, &qp[4]);
     const __m256i abs_dq = _mm256_mullo_epi32(abs_q, qp[3]);
     const __m256i nz_mask = _mm256_cmpgt_epi32(abs_q, _mm256_setzero_si256());
     const __m256i q = _mm256_sign_epi32(abs_q, coeff);
     const __m256i dq = _mm256_sign_epi32(abs_dq, coeff);

     _mm256_storeu_si256((__m256i *)qcoeff, q);
     _mm256_storeu_si256((__m256i *)dqcoeff, dq);

     *eob = get_max_lane_eob(iscan_ptr, *eob, nz_mask);
   }
 }

 void vpx_highbd_quantize_b_avx2(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 int step = 8;
   __m256i eob = _mm256_setzero_si256();
   __m256i qp[5];
   (void)scan;

   init_qp(zbin_ptr, round_ptr, quant_ptr, dequant_ptr, quant_shift_ptr, qp, 0);

   quantize(qp, coeff_ptr, iscan, qcoeff_ptr, dqcoeff_ptr, &eob);

   coeff_ptr += step;
   qcoeff_ptr += step;
   dqcoeff_ptr += step;
   iscan += step;
   n_coeffs -= step;

   update_qp(qp);

   while (n_coeffs > 0) {
     quantize(qp, coeff_ptr, iscan, qcoeff_ptr, dqcoeff_ptr, &eob);

     coeff_ptr += step;
     qcoeff_ptr += step;
     dqcoeff_ptr += step;
     iscan += step;
     n_coeffs -= step;
   }

   *eob_ptr = get_max_eob(eob);
 }

 static VPX_FORCE_INLINE __m256i mm256_mul_shift_epi32_logscale(const __m256i *x,
                                                                const __m256i *y,
                                                                int log_scale) {
   __m256i prod_lo = _mm256_mul_epi32(*x, *y);
   __m256i prod_hi = _mm256_srli_epi64(*x, 32);
   const __m256i mult_hi = _mm256_srli_epi64(*y, 32);
   const __m256i mask = _mm256_set_epi32(0, -1, 0, -1, 0, -1, 0, -1);
   prod_hi = _mm256_mul_epi32(prod_hi, mult_hi);
   prod_lo = _mm256_srli_epi64(prod_lo, 16 - log_scale);
   prod_lo = _mm256_and_si256(prod_lo, mask);
   prod_hi = _mm256_srli_epi64(prod_hi, 16 - log_scale);
   prod_hi = _mm256_slli_epi64(prod_hi, 32);
   return _mm256_or_si256(prod_lo, prod_hi);
 }

 static VPX_FORCE_INLINE void quantize_b_32x32(
     const __m256i *qp, const tran_low_t *coeff_ptr, const int16_t *iscan_ptr,
     tran_low_t *qcoeff, tran_low_t *dqcoeff, __m256i *eob) {
   const __m256i coeff = _mm256_loadu_si256((const __m256i *)coeff_ptr);
   const __m256i abs_coeff = _mm256_abs_epi32(coeff);
   const __m256i zbin_mask = _mm256_cmpgt_epi32(abs_coeff, qp[0]);

   if (_mm256_movemask_epi8(zbin_mask) == 0) {
     const __m256i zero = _mm256_setzero_si256();
     _mm256_storeu_si256((__m256i *)qcoeff, zero);
     _mm256_storeu_si256((__m256i *)dqcoeff, zero);
     return;
   }

   {
     const __m256i tmp_rnd =
         _mm256_and_si256(_mm256_add_epi32(abs_coeff, qp[1]), zbin_mask);
     // const int64_t tmp2 = ((tmpw * quant_ptr[rc != 0]) >> 16) + tmpw;
     const __m256i tmp = mm256_mul_shift_epi32_logscale(&tmp_rnd, &qp[2], 0);
     const __m256i tmp2 = _mm256_add_epi32(tmp, tmp_rnd);
     // const int abs_qcoeff = (int)((tmp2 * quant_shift_ptr[rc != 0]) >> 15);
     const __m256i abs_q = mm256_mul_shift_epi32_logscale(&tmp2, &qp[4], 1);
     const __m256i abs_dq =
         _mm256_srli_epi32(_mm256_mullo_epi32(abs_q, qp[3]), 1);
     const __m256i nz_mask = _mm256_cmpgt_epi32(abs_q, _mm256_setzero_si256());
     const __m256i q = _mm256_sign_epi32(abs_q, coeff);
     const __m256i dq = _mm256_sign_epi32(abs_dq, coeff);

     _mm256_storeu_si256((__m256i *)qcoeff, q);
     _mm256_storeu_si256((__m256i *)dqcoeff, dq);

     *eob = get_max_lane_eob(iscan_ptr, *eob, nz_mask);
   }
 }

 void vpx_highbd_quantize_b_32x32_avx2(
     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 unsigned int step = 8;
   __m256i eob = _mm256_setzero_si256();
   __m256i qp[5];
   (void)scan;

   init_qp(zbin_ptr, round_ptr, quant_ptr, dequant_ptr, quant_shift_ptr, qp, 1);

   quantize_b_32x32(qp, coeff_ptr, iscan, qcoeff_ptr, dqcoeff_ptr, &eob);

   coeff_ptr += step;
   qcoeff_ptr += step;
   dqcoeff_ptr += step;
   iscan += step;
   n_coeffs -= step;

   update_qp(qp);

   while (n_coeffs > 0) {
     quantize_b_32x32(qp, coeff_ptr, iscan, qcoeff_ptr, dqcoeff_ptr, &eob);

     coeff_ptr += step;
     qcoeff_ptr += step;
     dqcoeff_ptr += step;
     iscan += step;
     n_coeffs -= step;
   }

   *eob_ptr = get_max_eob(eob);
 }
	/*
	* Copyright (c) 2022 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 <immintrin.h>

	#include "./vpx_dsp_rtcd.h"

	static VPX_FORCE_INLINE void init_one_qp(const __m128i p, __m256i qp) {
	const __m128i sign = _mm_srai_epi16(*p, 15);
	const __m128i dc = _mm_unpacklo_epi16(*p, sign);
	const __m128i ac = _mm_unpackhi_epi16(*p, sign);
	*qp = _mm256_insertf128_si256(_mm256_castsi128_si256(dc), ac, 1);
	}

	static VPX_FORCE_INLINE void update_qp(__m256i *qp) {
	int i;
	for (i = 0; i < 5; ++i) {
	qp[i] = _mm256_permute2x128_si256(qp[i], qp[i], 0x11);
	}
	}

	static VPX_FORCE_INLINE void init_qp(const int16_t *zbin_ptr,
	const int16_t *round_ptr,
	const int16_t *quant_ptr,
	const int16_t *dequant_ptr,
	const int16_t *quant_shift_ptr,
	__m256i *qp, int log_scale) {
	const __m128i zbin = _mm_loadu_si128((const __m128i *)zbin_ptr);
	const __m128i round = _mm_loadu_si128((const __m128i *)round_ptr);
	const __m128i quant = _mm_loadu_si128((const __m128i *)quant_ptr);
	const __m128i dequant = _mm_loadu_si128((const __m128i *)dequant_ptr);
	const __m128i quant_shift = _mm_loadu_si128((const __m128i *)quant_shift_ptr);
	init_one_qp(&zbin, &qp[0]);
	init_one_qp(&round, &qp[1]);
	init_one_qp(&quant, &qp[2]);
	init_one_qp(&dequant, &qp[3]);
	init_one_qp(&quant_shift, &qp[4]);
	if (log_scale > 0) {
	const __m256i rnd = _mm256_set1_epi32((int16_t)(1 << (log_scale - 1)));
	qp[0] = _mm256_add_epi32(qp[0], rnd);
	qp[0] = _mm256_srai_epi32(qp[0], log_scale);

	qp[1] = _mm256_add_epi32(qp[1], rnd);
	qp[1] = _mm256_srai_epi32(qp[1], log_scale);
	}
	// Subtracting 1 here eliminates a _mm256_cmpeq_epi32() instruction when
	// calculating the zbin mask.
	qp[0] = _mm256_sub_epi32(qp[0], _mm256_set1_epi32(1));
	}

	// Note:
	// x is vector multiplied by y which is 16 int32_t parallel multiplication
	// and right shift 16. The output, 16 int32_t is save in *p.
	static VPX_FORCE_INLINE __m256i mm256_mul_shift_epi32(const __m256i *x,
	const __m256i *y) {
	__m256i prod_lo = _mm256_mul_epi32(x, y);
	__m256i prod_hi = _mm256_srli_epi64(*x, 32);
	const __m256i mult_hi = _mm256_srli_epi64(*y, 32);
	const __m256i mask = _mm256_set_epi32(0, -1, 0, -1, 0, -1, 0, -1);
	prod_hi = _mm256_mul_epi32(prod_hi, mult_hi);
	prod_lo = _mm256_srli_epi64(prod_lo, 16);
	prod_lo = _mm256_and_si256(prod_lo, mask);
	prod_hi = _mm256_srli_epi64(prod_hi, 16);
	prod_hi = _mm256_slli_epi64(prod_hi, 32);
	return _mm256_or_si256(prod_lo, prod_hi);
	}

	static VPX_FORCE_INLINE __m256i get_max_lane_eob(const int16_t *iscan_ptr,
	__m256i eobmax,
	__m256i nz_mask) {
	const __m256i packed_nz_mask = _mm256_packs_epi32(nz_mask, nz_mask);
	const __m256i packed_nz_mask_perm =
	_mm256_permute4x64_epi64(packed_nz_mask, 0xD8);
	const __m256i iscan =
	_mm256_castsi128_si256(_mm_loadu_si128((const __m128i *)iscan_ptr));
	const __m256i iscan_plus1 = _mm256_sub_epi16(iscan, packed_nz_mask_perm);
	const __m256i nz_iscan = _mm256_and_si256(iscan_plus1, packed_nz_mask_perm);
	return _mm256_max_epi16(eobmax, nz_iscan);
	}

	// Get the max eob from the lower 128 bits.
	static VPX_FORCE_INLINE uint16_t get_max_eob(__m256i eob) {
	__m256i eob_s;
	eob_s = _mm256_shuffle_epi32(eob, 0xe);
	eob = _mm256_max_epi16(eob, eob_s);
	eob_s = _mm256_shufflelo_epi16(eob, 0xe);
	eob = _mm256_max_epi16(eob, eob_s);
	eob_s = _mm256_shufflelo_epi16(eob, 1);
	eob = _mm256_max_epi16(eob, eob_s);
	#if defined(_MSC_VER) && (_MSC_VER < 1910)
	return _mm_cvtsi128_si32(_mm256_extracti128_si256(eob, 0)) & 0xffff;
	#else
	return (uint16_t)_mm256_extract_epi16(eob, 0);
	#endif
	}

	static VPX_FORCE_INLINE void quantize(const __m256i *qp,
	const tran_low_t *coeff_ptr,
	const int16_t *iscan_ptr,
	tran_low_t qcoeff, tran_low_t dqcoeff,
	__m256i *eob) {
	const __m256i coeff = _mm256_loadu_si256((const __m256i *)coeff_ptr);
	const __m256i abs_coeff = _mm256_abs_epi32(coeff);
	const __m256i zbin_mask = _mm256_cmpgt_epi32(abs_coeff, qp[0]);

	if (_mm256_movemask_epi8(zbin_mask) == 0) {
	const __m256i zero = _mm256_setzero_si256();
	_mm256_storeu_si256((__m256i *)qcoeff, zero);
	_mm256_storeu_si256((__m256i *)dqcoeff, zero);
	return;
	}
	{
	const __m256i tmp_rnd =
	_mm256_and_si256(_mm256_add_epi32(abs_coeff, qp[1]), zbin_mask);
	const __m256i tmp = mm256_mul_shift_epi32(&tmp_rnd, &qp[2]);
	const __m256i tmp2 = _mm256_add_epi32(tmp, tmp_rnd);
	const __m256i abs_q = mm256_mul_shift_epi32(&tmp2, &qp[4]);
	const __m256i abs_dq = _mm256_mullo_epi32(abs_q, qp[3]);
	const __m256i nz_mask = _mm256_cmpgt_epi32(abs_q, _mm256_setzero_si256());
	const __m256i q = _mm256_sign_epi32(abs_q, coeff);
	const __m256i dq = _mm256_sign_epi32(abs_dq, coeff);

	_mm256_storeu_si256((__m256i *)qcoeff, q);
	_mm256_storeu_si256((__m256i *)dqcoeff, dq);

	eob = get_max_lane_eob(iscan_ptr, eob, nz_mask);
	}
	}

	void vpx_highbd_quantize_b_avx2(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 int step = 8;
	__m256i eob = _mm256_setzero_si256();
	__m256i qp[5];
	(void)scan;

	init_qp(zbin_ptr, round_ptr, quant_ptr, dequant_ptr, quant_shift_ptr, qp, 0);

	quantize(qp, coeff_ptr, iscan, qcoeff_ptr, dqcoeff_ptr, &eob);

	coeff_ptr += step;
	qcoeff_ptr += step;
	dqcoeff_ptr += step;
	iscan += step;
	n_coeffs -= step;

	update_qp(qp);

	while (n_coeffs > 0) {
	quantize(qp, coeff_ptr, iscan, qcoeff_ptr, dqcoeff_ptr, &eob);

	coeff_ptr += step;
	qcoeff_ptr += step;
	dqcoeff_ptr += step;
	iscan += step;
	n_coeffs -= step;
	}

	*eob_ptr = get_max_eob(eob);
	}

	static VPX_FORCE_INLINE __m256i mm256_mul_shift_epi32_logscale(const __m256i *x,
	const __m256i *y,
	int log_scale) {
	__m256i prod_lo = _mm256_mul_epi32(x, y);
	__m256i prod_hi = _mm256_srli_epi64(*x, 32);
	const __m256i mult_hi = _mm256_srli_epi64(*y, 32);
	const __m256i mask = _mm256_set_epi32(0, -1, 0, -1, 0, -1, 0, -1);
	prod_hi = _mm256_mul_epi32(prod_hi, mult_hi);
	prod_lo = _mm256_srli_epi64(prod_lo, 16 - log_scale);
	prod_lo = _mm256_and_si256(prod_lo, mask);
	prod_hi = _mm256_srli_epi64(prod_hi, 16 - log_scale);
	prod_hi = _mm256_slli_epi64(prod_hi, 32);
	return _mm256_or_si256(prod_lo, prod_hi);
	}

	static VPX_FORCE_INLINE void quantize_b_32x32(
	const __m256i qp, const tran_low_t coeff_ptr, const int16_t *iscan_ptr,
	tran_low_t qcoeff, tran_low_t dqcoeff, __m256i *eob) {
	const __m256i coeff = _mm256_loadu_si256((const __m256i *)coeff_ptr);
	const __m256i abs_coeff = _mm256_abs_epi32(coeff);
	const __m256i zbin_mask = _mm256_cmpgt_epi32(abs_coeff, qp[0]);

	if (_mm256_movemask_epi8(zbin_mask) == 0) {
	const __m256i zero = _mm256_setzero_si256();
	_mm256_storeu_si256((__m256i *)qcoeff, zero);
	_mm256_storeu_si256((__m256i *)dqcoeff, zero);
	return;
	}

	{
	const __m256i tmp_rnd =
	_mm256_and_si256(_mm256_add_epi32(abs_coeff, qp[1]), zbin_mask);
	// const int64_t tmp2 = ((tmpw * quant_ptr[rc != 0]) >> 16) + tmpw;
	const __m256i tmp = mm256_mul_shift_epi32_logscale(&tmp_rnd, &qp[2], 0);
	const __m256i tmp2 = _mm256_add_epi32(tmp, tmp_rnd);
	// const int abs_qcoeff = (int)((tmp2 * quant_shift_ptr[rc != 0]) >> 15);
	const __m256i abs_q = mm256_mul_shift_epi32_logscale(&tmp2, &qp[4], 1);
	const __m256i abs_dq =
	_mm256_srli_epi32(_mm256_mullo_epi32(abs_q, qp[3]), 1);
	const __m256i nz_mask = _mm256_cmpgt_epi32(abs_q, _mm256_setzero_si256());
	const __m256i q = _mm256_sign_epi32(abs_q, coeff);
	const __m256i dq = _mm256_sign_epi32(abs_dq, coeff);

	_mm256_storeu_si256((__m256i *)qcoeff, q);
	_mm256_storeu_si256((__m256i *)dqcoeff, dq);

	eob = get_max_lane_eob(iscan_ptr, eob, nz_mask);
	}
	}

	void vpx_highbd_quantize_b_32x32_avx2(
	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 unsigned int step = 8;
	__m256i eob = _mm256_setzero_si256();
	__m256i qp[5];
	(void)scan;

	init_qp(zbin_ptr, round_ptr, quant_ptr, dequant_ptr, quant_shift_ptr, qp, 1);

	quantize_b_32x32(qp, coeff_ptr, iscan, qcoeff_ptr, dqcoeff_ptr, &eob);

	coeff_ptr += step;
	qcoeff_ptr += step;
	dqcoeff_ptr += step;
	iscan += step;
	n_coeffs -= step;

	update_qp(qp);

	while (n_coeffs > 0) {
	quantize_b_32x32(qp, coeff_ptr, iscan, qcoeff_ptr, dqcoeff_ptr, &eob);

	coeff_ptr += step;
	qcoeff_ptr += step;
	dqcoeff_ptr += step;
	iscan += step;
	n_coeffs -= step;
	}

	*eob_ptr = get_max_eob(eob);
	}