50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <arm_neon.h>
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#include "vpx_dsp/inv_txfm.h"
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#include "vpx_ports/mem.h"
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void vpx_idct4x4_1_add_neon(
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int16_t *input,
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uint8_t *dest,
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int dest_stride) {
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uint8x8_t d6u8;
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uint32x2_t d2u32 = vdup_n_u32(0);
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uint16x8_t q8u16;
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int16x8_t q0s16;
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uint8_t *d1, *d2;
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int16_t i, a1, cospi_16_64 = 11585;
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int16_t out = dct_const_round_shift(input[0] * cospi_16_64);
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out = dct_const_round_shift(out * cospi_16_64);
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a1 = ROUND_POWER_OF_TWO(out, 4);
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q0s16 = vdupq_n_s16(a1);
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// dc_only_idct_add
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d1 = d2 = dest;
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for (i = 0; i < 2; i++) {
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d2u32 = vld1_lane_u32((const uint32_t *)d1, d2u32, 0);
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d1 += dest_stride;
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d2u32 = vld1_lane_u32((const uint32_t *)d1, d2u32, 1);
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d1 += dest_stride;
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q8u16 = vaddw_u8(vreinterpretq_u16_s16(q0s16),
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vreinterpret_u8_u32(d2u32));
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d6u8 = vqmovun_s16(vreinterpretq_s16_u16(q8u16));
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vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 0);
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d2 += dest_stride;
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vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 1);
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d2 += dest_stride;
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}
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return;
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}
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