ref: a93705f7f9c15cdc2a1e62f6142e99f794923826
dir: /vpx_dsp/arm/idct8x8_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_config.h" #include "./vpx_dsp_rtcd.h" #include "vpx_dsp/arm/idct_neon.h" #include "vpx_dsp/arm/mem_neon.h" #include "vpx_dsp/arm/transpose_neon.h" #include "vpx_dsp/txfm_common.h" void vpx_idct8x8_64_add_neon(const tran_low_t *input, uint8_t *dest, int stride) { const int16x8_t cospis = vld1q_s16(kCospi); const int16x4_t cospis0 = vget_low_s16(cospis); // cospi 0, 8, 16, 24 const int16x4_t cospis1 = vget_high_s16(cospis); // cospi 4, 12, 20, 28 int16x8_t a[8]; a[0] = load_tran_low_to_s16q(input); a[1] = load_tran_low_to_s16q(input + 8); a[2] = load_tran_low_to_s16q(input + 16); a[3] = load_tran_low_to_s16q(input + 24); a[4] = load_tran_low_to_s16q(input + 32); a[5] = load_tran_low_to_s16q(input + 40); a[6] = load_tran_low_to_s16q(input + 48); a[7] = load_tran_low_to_s16q(input + 56); idct8x8_64_1d_bd8(cospis0, cospis1, a); idct8x8_64_1d_bd8(cospis0, cospis1, a); idct8x8_add8x8_neon(a, dest, stride); } void vpx_idct8x8_12_add_neon(const tran_low_t *input, uint8_t *dest, int stride) { const int16x8_t cospis = vld1q_s16(kCospi); const int16x8_t cospisd = vaddq_s16(cospis, cospis); const int16x4_t cospis0 = vget_low_s16(cospis); // cospi 0, 8, 16, 24 const int16x4_t cospisd0 = vget_low_s16(cospisd); // doubled 0, 8, 16, 24 const int16x4_t cospisd1 = vget_high_s16(cospisd); // doubled 4, 12, 20, 28 int16x4_t a[8]; int16x8_t b[8]; a[0] = load_tran_low_to_s16d(input); a[1] = load_tran_low_to_s16d(input + 8); a[2] = load_tran_low_to_s16d(input + 16); a[3] = load_tran_low_to_s16d(input + 24); idct8x8_12_pass1_bd8(cospis0, cospisd0, cospisd1, a); idct8x8_12_pass2_bd8(cospis0, cospisd0, cospisd1, a, b); idct8x8_add8x8_neon(b, dest, stride); }