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/*
* Copyright (c) 2014 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 <arm_neon.h>
#include "vpx_ports/mem.h"
#include "vp9/common/vp9_idct.h"
void vp9_idct4x4_1_add_neon(
int16_t *input,
uint8_t *dest,
int dest_stride) {
uint8x8_t d6u8;
uint32x2_t d2u32 = vdup_n_u32(0);
uint16x8_t q8u16;
int16x8_t q0s16;
uint8_t *d1, *d2;
int16_t i, a1, cospi_16_64 = 11585;
int16_t out = dct_const_round_shift(input[0] * cospi_16_64);
out = dct_const_round_shift(out * cospi_16_64);
a1 = ROUND_POWER_OF_TWO(out, 4);
q0s16 = vdupq_n_s16(a1);
// dc_only_idct_add
d1 = d2 = dest;
for (i = 0; i < 2; i++) {
d2u32 = vld1_lane_u32((const uint32_t *)d1, d2u32, 0);
d1 += dest_stride;
d2u32 = vld1_lane_u32((const uint32_t *)d1, d2u32, 1);
d1 += dest_stride;
q8u16 = vaddw_u8(vreinterpretq_u16_s16(q0s16),
vreinterpret_u8_u32(d2u32));
d6u8 = vqmovun_s16(vreinterpretq_s16_u16(q8u16));
vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 0);
d2 += dest_stride;
vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 1);
d2 += dest_stride;
}
return;
}
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