/* * Copyright (c) 2022 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. */ #ifndef VPX_VPX_DSP_ARM_FDCT4X4_NEON_H_ #define VPX_VPX_DSP_ARM_FDCT4X4_NEON_H_ #include static INLINE void vpx_fdct4x4_pass1_neon(int16x4_t *in) { int16x4_t out[4]; const int16x8_t input_01 = vcombine_s16(in[0], in[1]); const int16x8_t input_32 = vcombine_s16(in[3], in[2]); // in_0 +/- in_3, in_1 +/- in_2 const int16x8_t s_01 = vaddq_s16(input_01, input_32); const int16x8_t s_32 = vsubq_s16(input_01, input_32); // step_0 +/- step_1, step_2 +/- step_3 const int16x4_t s_0 = vget_low_s16(s_01); const int16x4_t s_1 = vget_high_s16(s_01); const int16x4_t s_2 = vget_high_s16(s_32); const int16x4_t s_3 = vget_low_s16(s_32); // fdct_round_shift(s_0 +/- s_1) * cospi_16_64 butterfly_one_coeff_s16_fast_half(s_0, s_1, cospi_16_64, &out[0], &out[2]); // s_3 * cospi_8_64 + s_2 * cospi_24_64 // s_3 * cospi_24_64 - s_2 * cospi_8_64 butterfly_two_coeff_half(s_3, s_2, cospi_8_64, cospi_24_64, &out[1], &out[3]); transpose_s16_4x4d(&out[0], &out[1], &out[2], &out[3]); in[0] = out[0]; in[1] = out[1]; in[2] = out[2]; in[3] = out[3]; } static INLINE void vpx_fdct4x4_pass2_neon(int16x4_t *in) { int16x4_t out[4]; const int16x8_t input_01 = vcombine_s16(in[0], in[1]); const int16x8_t input_32 = vcombine_s16(in[3], in[2]); // in_0 +/- in_3, in_1 +/- in_2 const int16x8_t s_01 = vaddq_s16(input_01, input_32); const int16x8_t s_32 = vsubq_s16(input_01, input_32); // step_0 +/- step_1, step_2 +/- step_3 const int16x4_t s_0 = vget_low_s16(s_01); const int16x4_t s_1 = vget_high_s16(s_01); const int16x4_t s_2 = vget_high_s16(s_32); const int16x4_t s_3 = vget_low_s16(s_32); // fdct_round_shift(s_0 +/- s_1) * cospi_16_64 butterfly_one_coeff_s16_s32_fast_narrow_half(s_0, s_1, cospi_16_64, &out[0], &out[2]); // s_3 * cospi_8_64 + s_2 * cospi_24_64 // s_3 * cospi_24_64 - s_2 * cospi_8_64 butterfly_two_coeff_half(s_3, s_2, cospi_8_64, cospi_24_64, &out[1], &out[3]); transpose_s16_4x4d(&out[0], &out[1], &out[2], &out[3]); in[0] = out[0]; in[1] = out[1]; in[2] = out[2]; in[3] = out[3]; } #if CONFIG_VP9_HIGHBITDEPTH static INLINE void vpx_highbd_fdct4x4_pass1_neon(int32x4_t *in) { int32x4_t out[4]; // in_0 +/- in_3, in_1 +/- in_2 const int32x4_t s_0 = vaddq_s32(in[0], in[3]); const int32x4_t s_1 = vaddq_s32(in[1], in[2]); const int32x4_t s_2 = vsubq_s32(in[1], in[2]); const int32x4_t s_3 = vsubq_s32(in[0], in[3]); butterfly_one_coeff_s32_fast_half(s_0, s_1, cospi_16_64, &out[0], &out[2]); // out[1] = s_3 * cospi_8_64 + s_2 * cospi_24_64 // out[3] = s_3 * cospi_24_64 - s_2 * cospi_8_64 butterfly_two_coeff_s32_s64_narrow_half(s_3, s_2, cospi_8_64, cospi_24_64, &out[1], &out[3]); transpose_s32_4x4(&out[0], &out[1], &out[2], &out[3]); in[0] = out[0]; in[1] = out[1]; in[2] = out[2]; in[3] = out[3]; } #endif // CONFIG_VP9_HIGHBITDEPTH #endif // VPX_VPX_DSP_ARM_FDCT4X4_NEON_H_