235 строки
7.5 KiB
C
235 строки
7.5 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#include <arm_neon.h>
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#include <assert.h>
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#include "./av1_rtcd.h"
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#include "./aom_config.h"
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#include "av1/common/common.h"
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static int16_t sinpi_1_9 = 0x14a3;
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static int16_t sinpi_2_9 = 0x26c9;
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static int16_t sinpi_3_9 = 0x3441;
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static int16_t sinpi_4_9 = 0x3b6c;
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static int16_t cospi_8_64 = 0x3b21;
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static int16_t cospi_16_64 = 0x2d41;
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static int16_t cospi_24_64 = 0x187e;
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static INLINE void TRANSPOSE4X4(int16x8_t *q8s16, int16x8_t *q9s16) {
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int32x4_t q8s32, q9s32;
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int16x4x2_t d0x2s16, d1x2s16;
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int32x4x2_t q0x2s32;
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d0x2s16 = vtrn_s16(vget_low_s16(*q8s16), vget_high_s16(*q8s16));
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d1x2s16 = vtrn_s16(vget_low_s16(*q9s16), vget_high_s16(*q9s16));
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q8s32 = vreinterpretq_s32_s16(vcombine_s16(d0x2s16.val[0], d0x2s16.val[1]));
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q9s32 = vreinterpretq_s32_s16(vcombine_s16(d1x2s16.val[0], d1x2s16.val[1]));
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q0x2s32 = vtrnq_s32(q8s32, q9s32);
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*q8s16 = vreinterpretq_s16_s32(q0x2s32.val[0]);
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*q9s16 = vreinterpretq_s16_s32(q0x2s32.val[1]);
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return;
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}
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static INLINE void GENERATE_COSINE_CONSTANTS(int16x4_t *d0s16, int16x4_t *d1s16,
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int16x4_t *d2s16) {
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*d0s16 = vdup_n_s16(cospi_8_64);
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*d1s16 = vdup_n_s16(cospi_16_64);
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*d2s16 = vdup_n_s16(cospi_24_64);
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return;
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}
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static INLINE void GENERATE_SINE_CONSTANTS(int16x4_t *d3s16, int16x4_t *d4s16,
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int16x4_t *d5s16, int16x8_t *q3s16) {
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*d3s16 = vdup_n_s16(sinpi_1_9);
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*d4s16 = vdup_n_s16(sinpi_2_9);
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*q3s16 = vdupq_n_s16(sinpi_3_9);
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*d5s16 = vdup_n_s16(sinpi_4_9);
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return;
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}
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static INLINE void IDCT4x4_1D(int16x4_t *d0s16, int16x4_t *d1s16,
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int16x4_t *d2s16, int16x8_t *q8s16,
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int16x8_t *q9s16) {
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int16x4_t d16s16, d17s16, d18s16, d19s16, d23s16, d24s16;
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int16x4_t d26s16, d27s16, d28s16, d29s16;
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int32x4_t q10s32, q13s32, q14s32, q15s32;
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int16x8_t q13s16, q14s16;
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d16s16 = vget_low_s16(*q8s16);
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d17s16 = vget_high_s16(*q8s16);
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d18s16 = vget_low_s16(*q9s16);
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d19s16 = vget_high_s16(*q9s16);
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d23s16 = vadd_s16(d16s16, d18s16);
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d24s16 = vsub_s16(d16s16, d18s16);
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q15s32 = vmull_s16(d17s16, *d2s16);
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q10s32 = vmull_s16(d17s16, *d0s16);
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q13s32 = vmull_s16(d23s16, *d1s16);
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q14s32 = vmull_s16(d24s16, *d1s16);
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q15s32 = vmlsl_s16(q15s32, d19s16, *d0s16);
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q10s32 = vmlal_s16(q10s32, d19s16, *d2s16);
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d26s16 = vqrshrn_n_s32(q13s32, 14);
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d27s16 = vqrshrn_n_s32(q14s32, 14);
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d29s16 = vqrshrn_n_s32(q15s32, 14);
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d28s16 = vqrshrn_n_s32(q10s32, 14);
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q13s16 = vcombine_s16(d26s16, d27s16);
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q14s16 = vcombine_s16(d28s16, d29s16);
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*q8s16 = vaddq_s16(q13s16, q14s16);
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*q9s16 = vsubq_s16(q13s16, q14s16);
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*q9s16 = vcombine_s16(vget_high_s16(*q9s16), vget_low_s16(*q9s16)); // vswp
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return;
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}
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static INLINE void IADST4x4_1D(int16x4_t *d3s16, int16x4_t *d4s16,
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int16x4_t *d5s16, int16x8_t *q3s16,
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int16x8_t *q8s16, int16x8_t *q9s16) {
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int16x4_t d6s16, d16s16, d17s16, d18s16, d19s16;
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int32x4_t q8s32, q9s32, q10s32, q11s32, q12s32, q13s32, q14s32, q15s32;
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d6s16 = vget_low_s16(*q3s16);
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d16s16 = vget_low_s16(*q8s16);
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d17s16 = vget_high_s16(*q8s16);
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d18s16 = vget_low_s16(*q9s16);
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d19s16 = vget_high_s16(*q9s16);
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q10s32 = vmull_s16(*d3s16, d16s16);
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q11s32 = vmull_s16(*d4s16, d16s16);
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q12s32 = vmull_s16(d6s16, d17s16);
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q13s32 = vmull_s16(*d5s16, d18s16);
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q14s32 = vmull_s16(*d3s16, d18s16);
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q15s32 = vmovl_s16(d16s16);
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q15s32 = vaddw_s16(q15s32, d19s16);
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q8s32 = vmull_s16(*d4s16, d19s16);
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q15s32 = vsubw_s16(q15s32, d18s16);
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q9s32 = vmull_s16(*d5s16, d19s16);
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q10s32 = vaddq_s32(q10s32, q13s32);
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q10s32 = vaddq_s32(q10s32, q8s32);
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q11s32 = vsubq_s32(q11s32, q14s32);
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q8s32 = vdupq_n_s32(sinpi_3_9);
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q11s32 = vsubq_s32(q11s32, q9s32);
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q15s32 = vmulq_s32(q15s32, q8s32);
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q13s32 = vaddq_s32(q10s32, q12s32);
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q10s32 = vaddq_s32(q10s32, q11s32);
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q14s32 = vaddq_s32(q11s32, q12s32);
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q10s32 = vsubq_s32(q10s32, q12s32);
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d16s16 = vqrshrn_n_s32(q13s32, 14);
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d17s16 = vqrshrn_n_s32(q14s32, 14);
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d18s16 = vqrshrn_n_s32(q15s32, 14);
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d19s16 = vqrshrn_n_s32(q10s32, 14);
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*q8s16 = vcombine_s16(d16s16, d17s16);
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*q9s16 = vcombine_s16(d18s16, d19s16);
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return;
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}
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void av1_iht4x4_16_add_neon(const tran_low_t *input, uint8_t *dest,
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int dest_stride, int tx_type) {
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uint8x8_t d26u8, d27u8;
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int16x4_t d0s16, d1s16, d2s16, d3s16, d4s16, d5s16;
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uint32x2_t d26u32, d27u32;
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int16x8_t q3s16, q8s16, q9s16;
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uint16x8_t q8u16, q9u16;
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d26u32 = d27u32 = vdup_n_u32(0);
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q8s16 = vld1q_s16(input);
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q9s16 = vld1q_s16(input + 8);
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TRANSPOSE4X4(&q8s16, &q9s16);
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switch (tx_type) {
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case 0: // idct_idct is not supported. Fall back to C
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av1_iht4x4_16_add_c(input, dest, dest_stride, tx_type);
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return;
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break;
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case 1: // iadst_idct
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// generate constants
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GENERATE_COSINE_CONSTANTS(&d0s16, &d1s16, &d2s16);
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GENERATE_SINE_CONSTANTS(&d3s16, &d4s16, &d5s16, &q3s16);
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// first transform rows
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IDCT4x4_1D(&d0s16, &d1s16, &d2s16, &q8s16, &q9s16);
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// transpose the matrix
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TRANSPOSE4X4(&q8s16, &q9s16);
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// then transform columns
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IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);
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break;
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case 2: // idct_iadst
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// generate constantsyy
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GENERATE_COSINE_CONSTANTS(&d0s16, &d1s16, &d2s16);
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GENERATE_SINE_CONSTANTS(&d3s16, &d4s16, &d5s16, &q3s16);
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// first transform rows
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IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);
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// transpose the matrix
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TRANSPOSE4X4(&q8s16, &q9s16);
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// then transform columns
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IDCT4x4_1D(&d0s16, &d1s16, &d2s16, &q8s16, &q9s16);
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break;
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case 3: // iadst_iadst
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// generate constants
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GENERATE_SINE_CONSTANTS(&d3s16, &d4s16, &d5s16, &q3s16);
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// first transform rows
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IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);
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// transpose the matrix
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TRANSPOSE4X4(&q8s16, &q9s16);
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// then transform columns
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IADST4x4_1D(&d3s16, &d4s16, &d5s16, &q3s16, &q8s16, &q9s16);
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break;
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default: // iadst_idct
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assert(0);
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break;
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}
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q8s16 = vrshrq_n_s16(q8s16, 4);
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q9s16 = vrshrq_n_s16(q9s16, 4);
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d26u32 = vld1_lane_u32((const uint32_t *)dest, d26u32, 0);
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dest += dest_stride;
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d26u32 = vld1_lane_u32((const uint32_t *)dest, d26u32, 1);
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dest += dest_stride;
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d27u32 = vld1_lane_u32((const uint32_t *)dest, d27u32, 0);
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dest += dest_stride;
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d27u32 = vld1_lane_u32((const uint32_t *)dest, d27u32, 1);
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q8u16 = vaddw_u8(vreinterpretq_u16_s16(q8s16), vreinterpret_u8_u32(d26u32));
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q9u16 = vaddw_u8(vreinterpretq_u16_s16(q9s16), vreinterpret_u8_u32(d27u32));
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d26u8 = vqmovun_s16(vreinterpretq_s16_u16(q8u16));
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d27u8 = vqmovun_s16(vreinterpretq_s16_u16(q9u16));
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vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d27u8), 1);
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dest -= dest_stride;
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vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d27u8), 0);
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dest -= dest_stride;
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vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d26u8), 1);
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dest -= dest_stride;
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vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d26u8), 0);
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return;
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}
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