av1/common/x86/highbd_convolve_2d_avx2.c - aom - Git at Google

 /*
  * Copyright (c) 2017, 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 <immintrin.h>
 #include <assert.h>

 #include "config/av1_rtcd.h"

 #include "aom_dsp/x86/convolve_avx2.h"
 #include "aom_dsp/x86/synonyms.h"
 #include "aom_dsp/aom_dsp_common.h"
 #include "aom_dsp/aom_filter.h"
 #include "av1/common/convolve.h"

 void av1_highbd_convolve_2d_sr_ssse3(
     const uint16_t *src, int src_stride, uint16_t *dst, int dst_stride, int w,
     int h, const InterpFilterParams *filter_params_x,
     const InterpFilterParams *filter_params_y, const int subpel_x_qn,
     const int subpel_y_qn, ConvolveParams *conv_params, int bd);

 void av1_highbd_convolve_2d_sr_avx2(const uint16_t *src, int src_stride,
                                     uint16_t *dst, int dst_stride, int w, int h,
                                     const InterpFilterParams *filter_params_x,
                                     const InterpFilterParams *filter_params_y,
                                     const int subpel_x_qn,
                                     const int subpel_y_qn,
                                     ConvolveParams *conv_params, int bd) {
   if (filter_params_x->taps == 12) {
     av1_highbd_convolve_2d_sr_ssse3(src, src_stride, dst, dst_stride, w, h,
                                     filter_params_x, filter_params_y,
                                     subpel_x_qn, subpel_y_qn, conv_params, bd);
     return;
   }

   DECLARE_ALIGNED(32, int16_t, im_block[(MAX_SB_SIZE + MAX_FILTER_TAP) * 8]);
   int im_h = h + filter_params_y->taps - 1;
   int im_stride = 8;
   int i, j;
   const int fo_vert = filter_params_y->taps / 2 - 1;
   const int fo_horiz = filter_params_x->taps / 2 - 1;
   const uint16_t *const src_ptr = src - fo_vert * src_stride - fo_horiz;

   // Check that, even with 12-bit input, the intermediate values will fit
   // into an unsigned 16-bit intermediate array.
   assert(bd + FILTER_BITS + 2 - conv_params->round_0 <= 16);

   __m256i s[8], coeffs_y[4], coeffs_x[4];

   const __m256i round_const_x = _mm256_set1_epi32(
       ((1 << conv_params->round_0) >> 1) + (1 << (bd + FILTER_BITS - 1)));
   const __m128i round_shift_x = _mm_cvtsi32_si128(conv_params->round_0);

   const __m256i round_const_y = _mm256_set1_epi32(
       ((1 << conv_params->round_1) >> 1) -
       (1 << (bd + 2 * FILTER_BITS - conv_params->round_0 - 1)));
   const __m128i round_shift_y = _mm_cvtsi32_si128(conv_params->round_1);

   const int bits =
       FILTER_BITS * 2 - conv_params->round_0 - conv_params->round_1;
   const __m128i round_shift_bits = _mm_cvtsi32_si128(bits);
   const __m256i round_const_bits = _mm256_set1_epi32((1 << bits) >> 1);
   const __m256i clip_pixel =
       _mm256_set1_epi16(bd == 10 ? 1023 : (bd == 12 ? 4095 : 255));
   const __m256i zero = _mm256_setzero_si256();

   prepare_coeffs(filter_params_x, subpel_x_qn, coeffs_x);
   prepare_coeffs(filter_params_y, subpel_y_qn, coeffs_y);

   for (j = 0; j < w; j += 8) {
     /* Horizontal filter */
     {
       for (i = 0; i < im_h; i += 2) {
         const __m256i row0 =
             _mm256_loadu_si256((__m256i *)&src_ptr[i * src_stride + j]);
         __m256i row1 = _mm256_setzero_si256();
         if (i + 1 < im_h)
           row1 =
               _mm256_loadu_si256((__m256i *)&src_ptr[(i + 1) * src_stride + j]);

         const __m256i r0 = _mm256_permute2x128_si256(row0, row1, 0x20);
         const __m256i r1 = _mm256_permute2x128_si256(row0, row1, 0x31);

         // even pixels
         s[0] = _mm256_alignr_epi8(r1, r0, 0);
         s[1] = _mm256_alignr_epi8(r1, r0, 4);
         s[2] = _mm256_alignr_epi8(r1, r0, 8);
         s[3] = _mm256_alignr_epi8(r1, r0, 12);

         __m256i res_even = convolve(s, coeffs_x);
         res_even = _mm256_sra_epi32(_mm256_add_epi32(res_even, round_const_x),
                                     round_shift_x);

         // odd pixels
         s[0] = _mm256_alignr_epi8(r1, r0, 2);
         s[1] = _mm256_alignr_epi8(r1, r0, 6);
         s[2] = _mm256_alignr_epi8(r1, r0, 10);
         s[3] = _mm256_alignr_epi8(r1, r0, 14);

         __m256i res_odd = convolve(s, coeffs_x);
         res_odd = _mm256_sra_epi32(_mm256_add_epi32(res_odd, round_const_x),
                                    round_shift_x);

         __m256i res_even1 = _mm256_packs_epi32(res_even, res_even);
         __m256i res_odd1 = _mm256_packs_epi32(res_odd, res_odd);
         __m256i res = _mm256_unpacklo_epi16(res_even1, res_odd1);

         _mm256_store_si256((__m256i *)&im_block[i * im_stride], res);
       }
     }

     /* Vertical filter */
     {
       __m256i s0 = _mm256_loadu_si256((__m256i *)(im_block + 0 * im_stride));
       __m256i s1 = _mm256_loadu_si256((__m256i *)(im_block + 1 * im_stride));
       __m256i s2 = _mm256_loadu_si256((__m256i *)(im_block + 2 * im_stride));
       __m256i s3 = _mm256_loadu_si256((__m256i *)(im_block + 3 * im_stride));
       __m256i s4 = _mm256_loadu_si256((__m256i *)(im_block + 4 * im_stride));
       __m256i s5 = _mm256_loadu_si256((__m256i *)(im_block + 5 * im_stride));

       s[0] = _mm256_unpacklo_epi16(s0, s1);
       s[1] = _mm256_unpacklo_epi16(s2, s3);
       s[2] = _mm256_unpacklo_epi16(s4, s5);

       s[4] = _mm256_unpackhi_epi16(s0, s1);
       s[5] = _mm256_unpackhi_epi16(s2, s3);
       s[6] = _mm256_unpackhi_epi16(s4, s5);

       for (i = 0; i < h; i += 2) {
         const int16_t *data = &im_block[i * im_stride];

         const __m256i s6 =
             _mm256_loadu_si256((__m256i *)(data + 6 * im_stride));
         const __m256i s7 =
             _mm256_loadu_si256((__m256i *)(data + 7 * im_stride));

         s[3] = _mm256_unpacklo_epi16(s6, s7);
         s[7] = _mm256_unpackhi_epi16(s6, s7);

         const __m256i res_a = convolve(s, coeffs_y);
         __m256i res_a_round = _mm256_sra_epi32(
             _mm256_add_epi32(res_a, round_const_y), round_shift_y);

         res_a_round = _mm256_sra_epi32(
             _mm256_add_epi32(res_a_round, round_const_bits), round_shift_bits);

         if (w - j > 4) {
           const __m256i res_b = convolve(s + 4, coeffs_y);
           __m256i res_b_round = _mm256_sra_epi32(
               _mm256_add_epi32(res_b, round_const_y), round_shift_y);
           res_b_round =
               _mm256_sra_epi32(_mm256_add_epi32(res_b_round, round_const_bits),
                                round_shift_bits);

           __m256i res_16bit = _mm256_packs_epi32(res_a_round, res_b_round);
           res_16bit = _mm256_min_epi16(res_16bit, clip_pixel);
           res_16bit = _mm256_max_epi16(res_16bit, zero);

           _mm_storeu_si128((__m128i *)&dst[i * dst_stride + j],
                            _mm256_castsi256_si128(res_16bit));
           _mm_storeu_si128((__m128i *)&dst[i * dst_stride + j + dst_stride],
                            _mm256_extracti128_si256(res_16bit, 1));
         } else if (w == 4) {
           res_a_round = _mm256_packs_epi32(res_a_round, res_a_round);
           res_a_round = _mm256_min_epi16(res_a_round, clip_pixel);
           res_a_round = _mm256_max_epi16(res_a_round, zero);

           _mm_storel_epi64((__m128i *)&dst[i * dst_stride + j],
                            _mm256_castsi256_si128(res_a_round));
           _mm_storel_epi64((__m128i *)&dst[i * dst_stride + j + dst_stride],
                            _mm256_extracti128_si256(res_a_round, 1));
         } else {
           res_a_round = _mm256_packs_epi32(res_a_round, res_a_round);
           res_a_round = _mm256_min_epi16(res_a_round, clip_pixel);
           res_a_round = _mm256_max_epi16(res_a_round, zero);

           xx_storel_32(&dst[i * dst_stride + j],
                        _mm256_castsi256_si128(res_a_round));
           xx_storel_32(&dst[i * dst_stride + j + dst_stride],
                        _mm256_extracti128_si256(res_a_round, 1));
         }

         s[0] = s[1];
         s[1] = s[2];
         s[2] = s[3];

         s[4] = s[5];
         s[5] = s[6];
         s[6] = s[7];
       }
     }
   }
 }
	/*
	* Copyright (c) 2017, 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 <immintrin.h>
	#include <assert.h>

	#include "config/av1_rtcd.h"

	#include "aom_dsp/x86/convolve_avx2.h"
	#include "aom_dsp/x86/synonyms.h"
	#include "aom_dsp/aom_dsp_common.h"
	#include "aom_dsp/aom_filter.h"
	#include "av1/common/convolve.h"

	void av1_highbd_convolve_2d_sr_ssse3(
	const uint16_t src, int src_stride, uint16_t dst, int dst_stride, int w,
	int h, const InterpFilterParams *filter_params_x,
	const InterpFilterParams *filter_params_y, const int subpel_x_qn,
	const int subpel_y_qn, ConvolveParams *conv_params, int bd);

	void av1_highbd_convolve_2d_sr_avx2(const uint16_t *src, int src_stride,
	uint16_t *dst, int dst_stride, int w, int h,
	const InterpFilterParams *filter_params_x,
	const InterpFilterParams *filter_params_y,
	const int subpel_x_qn,
	const int subpel_y_qn,
	ConvolveParams *conv_params, int bd) {
	if (filter_params_x->taps == 12) {
	av1_highbd_convolve_2d_sr_ssse3(src, src_stride, dst, dst_stride, w, h,
	filter_params_x, filter_params_y,
	subpel_x_qn, subpel_y_qn, conv_params, bd);
	return;
	}

	DECLARE_ALIGNED(32, int16_t, im_block[(MAX_SB_SIZE + MAX_FILTER_TAP) * 8]);
	int im_h = h + filter_params_y->taps - 1;
	int im_stride = 8;
	int i, j;
	const int fo_vert = filter_params_y->taps / 2 - 1;
	const int fo_horiz = filter_params_x->taps / 2 - 1;
	const uint16_t const src_ptr = src - fo_vert src_stride - fo_horiz;

	// Check that, even with 12-bit input, the intermediate values will fit
	// into an unsigned 16-bit intermediate array.
	assert(bd + FILTER_BITS + 2 - conv_params->round_0 <= 16);

	__m256i s[8], coeffs_y[4], coeffs_x[4];

	const __m256i round_const_x = _mm256_set1_epi32(
	((1 << conv_params->round_0) >> 1) + (1 << (bd + FILTER_BITS - 1)));
	const __m128i round_shift_x = _mm_cvtsi32_si128(conv_params->round_0);

	const __m256i round_const_y = _mm256_set1_epi32(
	((1 << conv_params->round_1) >> 1) -
	(1 << (bd + 2 * FILTER_BITS - conv_params->round_0 - 1)));
	const __m128i round_shift_y = _mm_cvtsi32_si128(conv_params->round_1);

	const int bits =
	FILTER_BITS * 2 - conv_params->round_0 - conv_params->round_1;
	const __m128i round_shift_bits = _mm_cvtsi32_si128(bits);
	const __m256i round_const_bits = _mm256_set1_epi32((1 << bits) >> 1);
	const __m256i clip_pixel =
	_mm256_set1_epi16(bd == 10 ? 1023 : (bd == 12 ? 4095 : 255));
	const __m256i zero = _mm256_setzero_si256();

	prepare_coeffs(filter_params_x, subpel_x_qn, coeffs_x);
	prepare_coeffs(filter_params_y, subpel_y_qn, coeffs_y);

	for (j = 0; j < w; j += 8) {
	/* Horizontal filter */
	{
	for (i = 0; i < im_h; i += 2) {
	const __m256i row0 =
	_mm256_loadu_si256((__m256i )&src_ptr[i src_stride + j]);
	__m256i row1 = _mm256_setzero_si256();
	if (i + 1 < im_h)
	row1 =
	_mm256_loadu_si256((__m256i )&src_ptr[(i + 1) src_stride + j]);

	const __m256i r0 = _mm256_permute2x128_si256(row0, row1, 0x20);
	const __m256i r1 = _mm256_permute2x128_si256(row0, row1, 0x31);

	// even pixels
	s[0] = _mm256_alignr_epi8(r1, r0, 0);
	s[1] = _mm256_alignr_epi8(r1, r0, 4);
	s[2] = _mm256_alignr_epi8(r1, r0, 8);
	s[3] = _mm256_alignr_epi8(r1, r0, 12);

	__m256i res_even = convolve(s, coeffs_x);
	res_even = _mm256_sra_epi32(_mm256_add_epi32(res_even, round_const_x),
	round_shift_x);

	// odd pixels
	s[0] = _mm256_alignr_epi8(r1, r0, 2);
	s[1] = _mm256_alignr_epi8(r1, r0, 6);
	s[2] = _mm256_alignr_epi8(r1, r0, 10);
	s[3] = _mm256_alignr_epi8(r1, r0, 14);

	__m256i res_odd = convolve(s, coeffs_x);
	res_odd = _mm256_sra_epi32(_mm256_add_epi32(res_odd, round_const_x),
	round_shift_x);

	__m256i res_even1 = _mm256_packs_epi32(res_even, res_even);
	__m256i res_odd1 = _mm256_packs_epi32(res_odd, res_odd);
	__m256i res = _mm256_unpacklo_epi16(res_even1, res_odd1);

	_mm256_store_si256((__m256i )&im_block[i im_stride], res);
	}
	}

	/* Vertical filter */
	{
	__m256i s0 = _mm256_loadu_si256((__m256i )(im_block + 0 im_stride));
	__m256i s1 = _mm256_loadu_si256((__m256i )(im_block + 1 im_stride));
	__m256i s2 = _mm256_loadu_si256((__m256i )(im_block + 2 im_stride));
	__m256i s3 = _mm256_loadu_si256((__m256i )(im_block + 3 im_stride));
	__m256i s4 = _mm256_loadu_si256((__m256i )(im_block + 4 im_stride));
	__m256i s5 = _mm256_loadu_si256((__m256i )(im_block + 5 im_stride));

	s[0] = _mm256_unpacklo_epi16(s0, s1);
	s[1] = _mm256_unpacklo_epi16(s2, s3);
	s[2] = _mm256_unpacklo_epi16(s4, s5);

	s[4] = _mm256_unpackhi_epi16(s0, s1);
	s[5] = _mm256_unpackhi_epi16(s2, s3);
	s[6] = _mm256_unpackhi_epi16(s4, s5);

	for (i = 0; i < h; i += 2) {
	const int16_t data = &im_block[i im_stride];

	const __m256i s6 =
	_mm256_loadu_si256((__m256i )(data + 6 im_stride));
	const __m256i s7 =
	_mm256_loadu_si256((__m256i )(data + 7 im_stride));

	s[3] = _mm256_unpacklo_epi16(s6, s7);
	s[7] = _mm256_unpackhi_epi16(s6, s7);

	const __m256i res_a = convolve(s, coeffs_y);
	__m256i res_a_round = _mm256_sra_epi32(
	_mm256_add_epi32(res_a, round_const_y), round_shift_y);

	res_a_round = _mm256_sra_epi32(
	_mm256_add_epi32(res_a_round, round_const_bits), round_shift_bits);

	if (w - j > 4) {
	const __m256i res_b = convolve(s + 4, coeffs_y);
	__m256i res_b_round = _mm256_sra_epi32(
	_mm256_add_epi32(res_b, round_const_y), round_shift_y);
	res_b_round =
	_mm256_sra_epi32(_mm256_add_epi32(res_b_round, round_const_bits),
	round_shift_bits);

	__m256i res_16bit = _mm256_packs_epi32(res_a_round, res_b_round);
	res_16bit = _mm256_min_epi16(res_16bit, clip_pixel);
	res_16bit = _mm256_max_epi16(res_16bit, zero);

	_mm_storeu_si128((__m128i )&dst[i dst_stride + j],
	_mm256_castsi256_si128(res_16bit));
	_mm_storeu_si128((__m128i )&dst[i dst_stride + j + dst_stride],
	_mm256_extracti128_si256(res_16bit, 1));
	} else if (w == 4) {
	res_a_round = _mm256_packs_epi32(res_a_round, res_a_round);
	res_a_round = _mm256_min_epi16(res_a_round, clip_pixel);
	res_a_round = _mm256_max_epi16(res_a_round, zero);

	_mm_storel_epi64((__m128i )&dst[i dst_stride + j],
	_mm256_castsi256_si128(res_a_round));
	_mm_storel_epi64((__m128i )&dst[i dst_stride + j + dst_stride],
	_mm256_extracti128_si256(res_a_round, 1));
	} else {
	res_a_round = _mm256_packs_epi32(res_a_round, res_a_round);
	res_a_round = _mm256_min_epi16(res_a_round, clip_pixel);
	res_a_round = _mm256_max_epi16(res_a_round, zero);

	xx_storel_32(&dst[i * dst_stride + j],
	_mm256_castsi256_si128(res_a_round));
	xx_storel_32(&dst[i * dst_stride + j + dst_stride],
	_mm256_extracti128_si256(res_a_round, 1));
	}

	s[0] = s[1];
	s[1] = s[2];
	s[2] = s[3];

	s[4] = s[5];
	s[5] = s[6];
	s[6] = s[7];
	}
	}
	}
	}