60 lines
1.9 KiB
C
60 lines
1.9 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 <assert.h>
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#include "./vpx_dsp_rtcd.h"
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#include "vpx_dsp/arm/idct_neon.h"
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#include "vpx_dsp/arm/mem_neon.h"
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#include "vpx_dsp/txfm_common.h"
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void vpx_idct4x4_16_add_neon(const tran_low_t *input, uint8_t *dest,
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int stride) {
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const uint8_t *dst = dest;
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uint32x2_t s32 = vdup_n_u32(0);
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int16x8_t a[2];
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uint8x8_t s, d[2];
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uint16x8_t sum[2];
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assert(!((intptr_t)dest % sizeof(uint32_t)));
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assert(!(stride % sizeof(uint32_t)));
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// Rows
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a[0] = load_tran_low_to_s16q(input);
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a[1] = load_tran_low_to_s16q(input + 8);
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transpose_idct4x4_16_bd8(a);
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// Columns
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a[1] = vcombine_s16(vget_high_s16(a[1]), vget_low_s16(a[1]));
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transpose_idct4x4_16_bd8(a);
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a[0] = vrshrq_n_s16(a[0], 4);
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a[1] = vrshrq_n_s16(a[1], 4);
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s = load_u8(dst, stride);
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dst += 2 * stride;
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// The elements are loaded in reverse order.
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s32 = vld1_lane_u32((const uint32_t *)dst, s32, 1);
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dst += stride;
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s32 = vld1_lane_u32((const uint32_t *)dst, s32, 0);
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sum[0] = vaddw_u8(vreinterpretq_u16_s16(a[0]), s);
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sum[1] = vaddw_u8(vreinterpretq_u16_s16(a[1]), vreinterpret_u8_u32(s32));
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d[0] = vqmovun_s16(vreinterpretq_s16_u16(sum[0]));
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d[1] = vqmovun_s16(vreinterpretq_s16_u16(sum[1]));
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store_u8(dest, stride, d[0]);
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dest += 2 * stride;
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// The elements are stored in reverse order.
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vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d[1]), 1);
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dest += stride;
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vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d[1]), 0);
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}
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