ref: defe094e9e5e081028b0d4fcbf61f5a49ff1c34e
dir: /vpx_dsp/arm/idct8x8_1_add_neon.c/
/* * 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_dsp_rtcd.h" #include "vpx_dsp/inv_txfm.h" static INLINE uint8x8_t create_dcd(const int16_t dc) { int16x8_t t = vdupq_n_s16(dc); return vqmovun_s16(t); } static INLINE void idct8x8_1_add_pos_kernel(uint8_t **dest, const int stride, const uint8x8_t res) { const uint8x8_t a = vld1_u8(*dest); const uint8x8_t b = vqadd_u8(a, res); vst1_u8(*dest, b); *dest += stride; } static INLINE void idct8x8_1_add_neg_kernel(uint8_t **dest, const int stride, const uint8x8_t res) { const uint8x8_t a = vld1_u8(*dest); const uint8x8_t b = vqsub_u8(a, res); vst1_u8(*dest, b); *dest += stride; } void vpx_idct8x8_1_add_neon(const tran_low_t *input, uint8_t *dest, int stride) { const int16_t out0 = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64)); const int16_t out1 = WRAPLOW(dct_const_round_shift(out0 * cospi_16_64)); const int16_t a1 = ROUND_POWER_OF_TWO(out1, 5); if (a1 >= 0) { const uint8x8_t dc = create_dcd(a1); idct8x8_1_add_pos_kernel(&dest, stride, dc); idct8x8_1_add_pos_kernel(&dest, stride, dc); idct8x8_1_add_pos_kernel(&dest, stride, dc); idct8x8_1_add_pos_kernel(&dest, stride, dc); idct8x8_1_add_pos_kernel(&dest, stride, dc); idct8x8_1_add_pos_kernel(&dest, stride, dc); idct8x8_1_add_pos_kernel(&dest, stride, dc); idct8x8_1_add_pos_kernel(&dest, stride, dc); } else { const uint8x8_t dc = create_dcd(-a1); idct8x8_1_add_neg_kernel(&dest, stride, dc); idct8x8_1_add_neg_kernel(&dest, stride, dc); idct8x8_1_add_neg_kernel(&dest, stride, dc); idct8x8_1_add_neg_kernel(&dest, stride, dc); idct8x8_1_add_neg_kernel(&dest, stride, dc); idct8x8_1_add_neg_kernel(&dest, stride, dc); idct8x8_1_add_neg_kernel(&dest, stride, dc); idct8x8_1_add_neg_kernel(&dest, stride, dc); } }