ref: 50dd3eb62c55d705ddc7b0f98658e9603c1dcc92
dir: /vpx_dsp/arm/idct32x32_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/arm/idct_neon.h" #include "vpx_dsp/inv_txfm.h" static INLINE void idct32x32_1_add_pos_kernel(uint8_t **dest, const int stride, const uint8x16_t res) { const uint8x16_t a0 = vld1q_u8(*dest); const uint8x16_t a1 = vld1q_u8(*dest + 16); const uint8x16_t b0 = vqaddq_u8(a0, res); const uint8x16_t b1 = vqaddq_u8(a1, res); vst1q_u8(*dest, b0); vst1q_u8(*dest + 16, b1); *dest += stride; } static INLINE void idct32x32_1_add_neg_kernel(uint8_t **dest, const int stride, const uint8x16_t res) { const uint8x16_t a0 = vld1q_u8(*dest); const uint8x16_t a1 = vld1q_u8(*dest + 16); const uint8x16_t b0 = vqsubq_u8(a0, res); const uint8x16_t b1 = vqsubq_u8(a1, res); vst1q_u8(*dest, b0); vst1q_u8(*dest + 16, b1); *dest += stride; } void vpx_idct32x32_1_add_neon(const tran_low_t *input, uint8_t *dest, int stride) { int i; 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, 6); if (a1 >= 0) { const uint8x16_t dc = create_dcq(a1); for (i = 0; i < 32; i++) { idct32x32_1_add_pos_kernel(&dest, stride, dc); } } else { const uint8x16_t dc = create_dcq(-a1); for (i = 0; i < 32; i++) { idct32x32_1_add_neg_kernel(&dest, stride, dc); } } }