av1/common/arm/neon/iht4x4_add_neon.c - aom - Git at Google

 /*
  * Copyright (c) 2016, 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 <arm_neon.h>
 #include <assert.h>

 #include "./aom_config.h"
 #include "./av1_rtcd.h"
 #include "aom_dsp/txfm_common.h"
 #include "av1/common/common.h"

 static INLINE void TRANSPOSE4X4(int16x8_t *q8s16, int16x8_t *q9s16) {
   int32x4_t q8s32, q9s32;
   int16x4x2_t d0x2s16, d1x2s16;
   int32x4x2_t q0x2s32;

   d0x2s16 = vtrn_s16(vget_low_s16(*q8s16), vget_high_s16(*q8s16));
   d1x2s16 = vtrn_s16(vget_low_s16(*q9s16), vget_high_s16(*q9s16));

   q8s32 = vreinterpretq_s32_s16(vcombine_s16(d0x2s16.val[0], d0x2s16.val[1]));
   q9s32 = vreinterpretq_s32_s16(vcombine_s16(d1x2s16.val[0], d1x2s16.val[1]));
   q0x2s32 = vtrnq_s32(q8s32, q9s32);

   *q8s16 = vreinterpretq_s16_s32(q0x2s32.val[0]);
   *q9s16 = vreinterpretq_s16_s32(q0x2s32.val[1]);
   return;
 }

 static INLINE void GENERATE_COSINE_CONSTANTS(int16x4_t *d0s16, int16x4_t *d1s16,
                                              int16x4_t *d2s16) {
   *d0s16 = vdup_n_s16((int16_t)cospi_8_64);
   *d1s16 = vdup_n_s16((int16_t)cospi_16_64);
   *d2s16 = vdup_n_s16((int16_t)cospi_24_64);
   return;
 }

 static INLINE void GENERATE_SINE_CONSTANTS(int16x4_t *d3s16, int16x4_t *d4s16,
                                            int16x4_t *d5s16, int16x8_t *q3s16) {
   *d3s16 = vdup_n_s16((int16_t)sinpi_1_9);
   *d4s16 = vdup_n_s16((int16_t)sinpi_2_9);
   *q3s16 = vdupq_n_s16((int16_t)sinpi_3_9);
   *d5s16 = vdup_n_s16((int16_t)sinpi_4_9);
   return;
 }

 static INLINE void IDCT4x4_1D(int16x4_t *d0s16, int16x4_t *d1s16,
                               int16x4_t *d2s16, int16x8_t *q8s16,
                               int16x8_t *q9s16) {
   int16x4_t d16s16, d17s16, d18s16, d19s16, d23s16, d24s16;
   int16x4_t d26s16, d27s16, d28s16, d29s16;
   int32x4_t q10s32, q13s32, q14s32, q15s32;
   int16x8_t q13s16, q14s16;

   d16s16 = vget_low_s16(*q8s16);
   d17s16 = vget_high_s16(*q8s16);
   d18s16 = vget_low_s16(*q9s16);
   d19s16 = vget_high_s16(*q9s16);

   d23s16 = vadd_s16(d16s16, d18s16);
   d24s16 = vsub_s16(d16s16, d18s16);

   q15s32 = vmull_s16(d17s16, *d2s16);
   q10s32 = vmull_s16(d17s16, *d0s16);
   q13s32 = vmull_s16(d23s16, *d1s16);
   q14s32 = vmull_s16(d24s16, *d1s16);
   q15s32 = vmlsl_s16(q15s32, d19s16, *d0s16);
   q10s32 = vmlal_s16(q10s32, d19s16, *d2s16);

   d26s16 = vqrshrn_n_s32(q13s32, 14);
   d27s16 = vqrshrn_n_s32(q14s32, 14);
   d29s16 = vqrshrn_n_s32(q15s32, 14);
   d28s16 = vqrshrn_n_s32(q10s32, 14);

   q13s16 = vcombine_s16(d26s16, d27s16);
   q14s16 = vcombine_s16(d28s16, d29s16);
   *q8s16 = vaddq_s16(q13s16, q14s16);
   *q9s16 = vsubq_s16(q13s16, q14s16);
   *q9s16 = vcombine_s16(vget_high_s16(*q9s16), vget_low_s16(*q9s16));  // vswp
   return;
 }

 static INLINE void IADST4x4_1D(int16x4_t *d3s16, int16x4_t *d4s16,
                                int16x4_t *d5s16, int16x8_t *q3s16,
                                int16x8_t *q8s16, int16x8_t *q9s16) {
   int16x4_t d6s16, d16s16, d17s16, d18s16, d19s16;
   int32x4_t q8s32, q9s32, q10s32, q11s32, q12s32, q13s32, q14s32, q15s32;

   d6s16 = vget_low_s16(*q3s16);

   d16s16 = vget_low_s16(*q8s16);
   d17s16 = vget_high_s16(*q8s16);
   d18s16 = vget_low_s16(*q9s16);
   d19s16 = vget_high_s16(*q9s16);

   q10s32 = vmull_s16(*d3s16, d16s16);
   q11s32 = vmull_s16(*d4s16, d16s16);
   q12s32 = vmull_s16(d6s16, d17s16);
   q13s32 = vmull_s16(*d5s16, d18s16);
   q14s32 = vmull_s16(*d3s16, d18s16);
   q15s32 = vmovl_s16(d16s16);
   q15s32 = vaddw_s16(q15s32, d19s16);
   q8s32 = vmull_s16(*d4s16, d19s16);
   q15s32 = vsubw_s16(q15s32, d18s16);
   q9s32 = vmull_s16(*d5s16, d19s16);

   q10s32 = vaddq_s32(q10s32, q13s32);
   q10s32 = vaddq_s32(q10s32, q8s32);
   q11s32 = vsubq_s32(q11s32, q14s32);
   q8s32 = vdupq_n_s32((int32_t)sinpi_3_9);
   q11s32 = vsubq_s32(q11s32, q9s32);
   q15s32 = vmulq_s32(q15s32, q8s32);

   q13s32 = vaddq_s32(q10s32, q12s32);
   q10s32 = vaddq_s32(q10s32, q11s32);
   q14s32 = vaddq_s32(q11s32, q12s32);
   q10s32 = vsubq_s32(q10s32, q12s32);

   d16s16 = vqrshrn_n_s32(q13s32, 14);
   d17s16 = vqrshrn_n_s32(q14s32, 14);
   d18s16 = vqrshrn_n_s32(q15s32, 14);
   d19s16 = vqrshrn_n_s32(q10s32, 14);

   *q8s16 = vcombine_s16(d16s16, d17s16);
   *q9s16 = vcombine_s16(d18s16, d19s16);
   return;
 }

 void av1_iht4x4_16_add_neon(const tran_low_t *input, uint8_t *dest,
                             int dest_stride, const TxfmParam *txfm_param) {
   uint8x8_t d26u8, d27u8;
   int16x4_t d0s16, d1s16, d2s16, d3s16, d4s16, d5s16;
   uint32x2_t d26u32, d27u32;
   int16x8_t q3s16, q8s16, q9s16;
   uint16x8_t q8u16, q9u16;

   d26u32 = d27u32 = vdup_n_u32(0);

   q8s16 = vld1q_s16(input);
   q9s16 = vld1q_s16(input + 8);

   TRANSPOSE4X4(&q8s16, &q9s16);

   int tx_type = txfm_param->tx_type;
   switch (tx_type) {
     case 0:  // idct_idct is not supported. Fall back to C
       av1_iht4x4_16_add_c(input, dest, dest_stride, txfm_param);
       return;
       break;
     case 1:  // iadst_idct
       // generate constants
       GENERATE_COSINE_CONSTANTS(&d0s16, &d1s16, &d2s16);
       GENERATE_SINE_CONSTANTS(&d3s16, &d4s16, &d5s16, &q3s16);

       // first transform rows
       IDCT4x4_1D(&d0s16, &d1s16, &d2s16, &q8s16, &q9s16);

       // transpose the matrix
       TRANSPOSE4X4(&q8s16, &q9s16);

       // then transform columns
       IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);
       break;
     case 2:  // idct_iadst
       // generate constantsyy
       GENERATE_COSINE_CONSTANTS(&d0s16, &d1s16, &d2s16);
       GENERATE_SINE_CONSTANTS(&d3s16, &d4s16, &d5s16, &q3s16);

       // first transform rows
       IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);

       // transpose the matrix
       TRANSPOSE4X4(&q8s16, &q9s16);

       // then transform columns
       IDCT4x4_1D(&d0s16, &d1s16, &d2s16, &q8s16, &q9s16);
       break;
     case 3:  // iadst_iadst
       // generate constants
       GENERATE_SINE_CONSTANTS(&d3s16, &d4s16, &d5s16, &q3s16);

       // first transform rows
       IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);

       // transpose the matrix
       TRANSPOSE4X4(&q8s16, &q9s16);

       // then transform columns
       IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);
       break;
     default:  // iadst_idct
       assert(0);
       break;
   }

   q8s16 = vrshrq_n_s16(q8s16, 4);
   q9s16 = vrshrq_n_s16(q9s16, 4);

   d26u32 = vld1_lane_u32((const uint32_t *)dest, d26u32, 0);
   dest += dest_stride;
   d26u32 = vld1_lane_u32((const uint32_t *)dest, d26u32, 1);
   dest += dest_stride;
   d27u32 = vld1_lane_u32((const uint32_t *)dest, d27u32, 0);
   dest += dest_stride;
   d27u32 = vld1_lane_u32((const uint32_t *)dest, d27u32, 1);

   q8u16 = vaddw_u8(vreinterpretq_u16_s16(q8s16), vreinterpret_u8_u32(d26u32));
   q9u16 = vaddw_u8(vreinterpretq_u16_s16(q9s16), vreinterpret_u8_u32(d27u32));

   d26u8 = vqmovun_s16(vreinterpretq_s16_u16(q8u16));
   d27u8 = vqmovun_s16(vreinterpretq_s16_u16(q9u16));

   vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d27u8), 1);
   dest -= dest_stride;
   vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d27u8), 0);
   dest -= dest_stride;
   vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d26u8), 1);
   dest -= dest_stride;
   vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d26u8), 0);
   return;
 }
	/*
	* Copyright (c) 2016, 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 <arm_neon.h>
	#include <assert.h>

	#include "./aom_config.h"
	#include "./av1_rtcd.h"
	#include "aom_dsp/txfm_common.h"
	#include "av1/common/common.h"

	static INLINE void TRANSPOSE4X4(int16x8_t q8s16, int16x8_t q9s16) {
	int32x4_t q8s32, q9s32;
	int16x4x2_t d0x2s16, d1x2s16;
	int32x4x2_t q0x2s32;

	d0x2s16 = vtrn_s16(vget_low_s16(q8s16), vget_high_s16(q8s16));
	d1x2s16 = vtrn_s16(vget_low_s16(q9s16), vget_high_s16(q9s16));

	q8s32 = vreinterpretq_s32_s16(vcombine_s16(d0x2s16.val[0], d0x2s16.val[1]));
	q9s32 = vreinterpretq_s32_s16(vcombine_s16(d1x2s16.val[0], d1x2s16.val[1]));
	q0x2s32 = vtrnq_s32(q8s32, q9s32);

	*q8s16 = vreinterpretq_s16_s32(q0x2s32.val[0]);
	*q9s16 = vreinterpretq_s16_s32(q0x2s32.val[1]);
	return;
	}

	static INLINE void GENERATE_COSINE_CONSTANTS(int16x4_t d0s16, int16x4_t d1s16,
	int16x4_t *d2s16) {
	*d0s16 = vdup_n_s16((int16_t)cospi_8_64);
	*d1s16 = vdup_n_s16((int16_t)cospi_16_64);
	*d2s16 = vdup_n_s16((int16_t)cospi_24_64);
	return;
	}

	static INLINE void GENERATE_SINE_CONSTANTS(int16x4_t d3s16, int16x4_t d4s16,
	int16x4_t d5s16, int16x8_t q3s16) {
	*d3s16 = vdup_n_s16((int16_t)sinpi_1_9);
	*d4s16 = vdup_n_s16((int16_t)sinpi_2_9);
	*q3s16 = vdupq_n_s16((int16_t)sinpi_3_9);
	*d5s16 = vdup_n_s16((int16_t)sinpi_4_9);
	return;
	}

	static INLINE void IDCT4x4_1D(int16x4_t d0s16, int16x4_t d1s16,
	int16x4_t d2s16, int16x8_t q8s16,
	int16x8_t *q9s16) {
	int16x4_t d16s16, d17s16, d18s16, d19s16, d23s16, d24s16;
	int16x4_t d26s16, d27s16, d28s16, d29s16;
	int32x4_t q10s32, q13s32, q14s32, q15s32;
	int16x8_t q13s16, q14s16;

	d16s16 = vget_low_s16(*q8s16);
	d17s16 = vget_high_s16(*q8s16);
	d18s16 = vget_low_s16(*q9s16);
	d19s16 = vget_high_s16(*q9s16);

	d23s16 = vadd_s16(d16s16, d18s16);
	d24s16 = vsub_s16(d16s16, d18s16);

	q15s32 = vmull_s16(d17s16, *d2s16);
	q10s32 = vmull_s16(d17s16, *d0s16);
	q13s32 = vmull_s16(d23s16, *d1s16);
	q14s32 = vmull_s16(d24s16, *d1s16);
	q15s32 = vmlsl_s16(q15s32, d19s16, *d0s16);
	q10s32 = vmlal_s16(q10s32, d19s16, *d2s16);

	d26s16 = vqrshrn_n_s32(q13s32, 14);
	d27s16 = vqrshrn_n_s32(q14s32, 14);
	d29s16 = vqrshrn_n_s32(q15s32, 14);
	d28s16 = vqrshrn_n_s32(q10s32, 14);

	q13s16 = vcombine_s16(d26s16, d27s16);
	q14s16 = vcombine_s16(d28s16, d29s16);
	*q8s16 = vaddq_s16(q13s16, q14s16);
	*q9s16 = vsubq_s16(q13s16, q14s16);
	q9s16 = vcombine_s16(vget_high_s16(q9s16), vget_low_s16(*q9s16)); // vswp
	return;
	}

	static INLINE void IADST4x4_1D(int16x4_t d3s16, int16x4_t d4s16,
	int16x4_t d5s16, int16x8_t q3s16,
	int16x8_t q8s16, int16x8_t q9s16) {
	int16x4_t d6s16, d16s16, d17s16, d18s16, d19s16;
	int32x4_t q8s32, q9s32, q10s32, q11s32, q12s32, q13s32, q14s32, q15s32;

	d6s16 = vget_low_s16(*q3s16);

	d16s16 = vget_low_s16(*q8s16);
	d17s16 = vget_high_s16(*q8s16);
	d18s16 = vget_low_s16(*q9s16);
	d19s16 = vget_high_s16(*q9s16);

	q10s32 = vmull_s16(*d3s16, d16s16);
	q11s32 = vmull_s16(*d4s16, d16s16);
	q12s32 = vmull_s16(d6s16, d17s16);
	q13s32 = vmull_s16(*d5s16, d18s16);
	q14s32 = vmull_s16(*d3s16, d18s16);
	q15s32 = vmovl_s16(d16s16);
	q15s32 = vaddw_s16(q15s32, d19s16);
	q8s32 = vmull_s16(*d4s16, d19s16);
	q15s32 = vsubw_s16(q15s32, d18s16);
	q9s32 = vmull_s16(*d5s16, d19s16);

	q10s32 = vaddq_s32(q10s32, q13s32);
	q10s32 = vaddq_s32(q10s32, q8s32);
	q11s32 = vsubq_s32(q11s32, q14s32);
	q8s32 = vdupq_n_s32((int32_t)sinpi_3_9);
	q11s32 = vsubq_s32(q11s32, q9s32);
	q15s32 = vmulq_s32(q15s32, q8s32);

	q13s32 = vaddq_s32(q10s32, q12s32);
	q10s32 = vaddq_s32(q10s32, q11s32);
	q14s32 = vaddq_s32(q11s32, q12s32);
	q10s32 = vsubq_s32(q10s32, q12s32);

	d16s16 = vqrshrn_n_s32(q13s32, 14);
	d17s16 = vqrshrn_n_s32(q14s32, 14);
	d18s16 = vqrshrn_n_s32(q15s32, 14);
	d19s16 = vqrshrn_n_s32(q10s32, 14);

	*q8s16 = vcombine_s16(d16s16, d17s16);
	*q9s16 = vcombine_s16(d18s16, d19s16);
	return;
	}

	void av1_iht4x4_16_add_neon(const tran_low_t input, uint8_t dest,
	int dest_stride, const TxfmParam *txfm_param) {
	uint8x8_t d26u8, d27u8;
	int16x4_t d0s16, d1s16, d2s16, d3s16, d4s16, d5s16;
	uint32x2_t d26u32, d27u32;
	int16x8_t q3s16, q8s16, q9s16;
	uint16x8_t q8u16, q9u16;

	d26u32 = d27u32 = vdup_n_u32(0);

	q8s16 = vld1q_s16(input);
	q9s16 = vld1q_s16(input + 8);

	TRANSPOSE4X4(&q8s16, &q9s16);

	int tx_type = txfm_param->tx_type;
	switch (tx_type) {
	case 0: // idct_idct is not supported. Fall back to C
	av1_iht4x4_16_add_c(input, dest, dest_stride, txfm_param);
	return;
	break;
	case 1: // iadst_idct
	// generate constants
	GENERATE_COSINE_CONSTANTS(&d0s16, &d1s16, &d2s16);
	GENERATE_SINE_CONSTANTS(&d3s16, &d4s16, &d5s16, &q3s16);

	// first transform rows
	IDCT4x4_1D(&d0s16, &d1s16, &d2s16, &q8s16, &q9s16);

	// transpose the matrix
	TRANSPOSE4X4(&q8s16, &q9s16);

	// then transform columns
	IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);
	break;
	case 2: // idct_iadst
	// generate constantsyy
	GENERATE_COSINE_CONSTANTS(&d0s16, &d1s16, &d2s16);
	GENERATE_SINE_CONSTANTS(&d3s16, &d4s16, &d5s16, &q3s16);

	// first transform rows
	IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);

	// transpose the matrix
	TRANSPOSE4X4(&q8s16, &q9s16);

	// then transform columns
	IDCT4x4_1D(&d0s16, &d1s16, &d2s16, &q8s16, &q9s16);
	break;
	case 3: // iadst_iadst
	// generate constants
	GENERATE_SINE_CONSTANTS(&d3s16, &d4s16, &d5s16, &q3s16);

	// first transform rows
	IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);

	// transpose the matrix
	TRANSPOSE4X4(&q8s16, &q9s16);

	// then transform columns
	IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);
	break;
	default: // iadst_idct
	assert(0);
	break;
	}

	q8s16 = vrshrq_n_s16(q8s16, 4);
	q9s16 = vrshrq_n_s16(q9s16, 4);

	d26u32 = vld1_lane_u32((const uint32_t *)dest, d26u32, 0);
	dest += dest_stride;
	d26u32 = vld1_lane_u32((const uint32_t *)dest, d26u32, 1);
	dest += dest_stride;
	d27u32 = vld1_lane_u32((const uint32_t *)dest, d27u32, 0);
	dest += dest_stride;
	d27u32 = vld1_lane_u32((const uint32_t *)dest, d27u32, 1);

	q8u16 = vaddw_u8(vreinterpretq_u16_s16(q8s16), vreinterpret_u8_u32(d26u32));
	q9u16 = vaddw_u8(vreinterpretq_u16_s16(q9s16), vreinterpret_u8_u32(d27u32));

	d26u8 = vqmovun_s16(vreinterpretq_s16_u16(q8u16));
	d27u8 = vqmovun_s16(vreinterpretq_s16_u16(q9u16));

	vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d27u8), 1);
	dest -= dest_stride;
	vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d27u8), 0);
	dest -= dest_stride;
	vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d26u8), 1);
	dest -= dest_stride;
	vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d26u8), 0);
	return;
	}