| /* |
| * Copyright (c) 2018, Alliance for Open Media. All rights reserved. |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| s * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #include <xmmintrin.h> |
| |
| #include "config/aom_dsp_rtcd.h" |
| #include "aom_dsp/aom_dsp_common.h" |
| #include "aom_dsp/fft_common.h" |
| |
| static inline void transpose4x4(const float *A, float *B, const int lda, |
| const int ldb) { |
| __m128 row1 = _mm_load_ps(&A[0 * lda]); |
| __m128 row2 = _mm_load_ps(&A[1 * lda]); |
| __m128 row3 = _mm_load_ps(&A[2 * lda]); |
| __m128 row4 = _mm_load_ps(&A[3 * lda]); |
| _MM_TRANSPOSE4_PS(row1, row2, row3, row4); |
| _mm_store_ps(&B[0 * ldb], row1); |
| _mm_store_ps(&B[1 * ldb], row2); |
| _mm_store_ps(&B[2 * ldb], row3); |
| _mm_store_ps(&B[3 * ldb], row4); |
| } |
| |
| // Referenced by fft_avx2.c. |
| void aom_transpose_float_sse2(const float *A, float *B, int n); |
| |
| void aom_transpose_float_sse2(const float *A, float *B, int n) { |
| for (int y = 0; y < n; y += 4) { |
| for (int x = 0; x < n; x += 4) { |
| transpose4x4(A + y * n + x, B + x * n + y, n, n); |
| } |
| } |
| } |
| |
| // Referenced by fft_avx2.c. |
| void aom_fft_unpack_2d_output_sse2(const float *packed, float *output, int n); |
| |
| void aom_fft_unpack_2d_output_sse2(const float *packed, float *output, int n) { |
| const int n2 = n / 2; |
| output[0] = packed[0]; |
| output[1] = 0; |
| output[2 * (n2 * n)] = packed[n2 * n]; |
| output[2 * (n2 * n) + 1] = 0; |
| |
| output[2 * n2] = packed[n2]; |
| output[2 * n2 + 1] = 0; |
| output[2 * (n2 * n + n2)] = packed[n2 * n + n2]; |
| output[2 * (n2 * n + n2) + 1] = 0; |
| |
| for (int c = 1; c < n2; ++c) { |
| output[2 * (0 * n + c)] = packed[c]; |
| output[2 * (0 * n + c) + 1] = packed[c + n2]; |
| output[2 * (n2 * n + c) + 0] = packed[n2 * n + c]; |
| output[2 * (n2 * n + c) + 1] = packed[n2 * n + c + n2]; |
| } |
| for (int r = 1; r < n2; ++r) { |
| output[2 * (r * n + 0)] = packed[r * n]; |
| output[2 * (r * n + 0) + 1] = packed[(r + n2) * n]; |
| output[2 * (r * n + n2) + 0] = packed[r * n + n2]; |
| output[2 * (r * n + n2) + 1] = packed[(r + n2) * n + n2]; |
| |
| for (int c = 1; c < AOMMIN(n2, 4); ++c) { |
| output[2 * (r * n + c)] = |
| packed[r * n + c] - packed[(r + n2) * n + c + n2]; |
| output[2 * (r * n + c) + 1] = |
| packed[(r + n2) * n + c] + packed[r * n + c + n2]; |
| } |
| |
| for (int c = 4; c < n2; c += 4) { |
| __m128 real1 = _mm_load_ps(packed + r * n + c); |
| __m128 real2 = _mm_load_ps(packed + (r + n2) * n + c + n2); |
| __m128 imag1 = _mm_load_ps(packed + (r + n2) * n + c); |
| __m128 imag2 = _mm_load_ps(packed + r * n + c + n2); |
| real1 = _mm_sub_ps(real1, real2); |
| imag1 = _mm_add_ps(imag1, imag2); |
| _mm_store_ps(output + 2 * (r * n + c), _mm_unpacklo_ps(real1, imag1)); |
| _mm_store_ps(output + 2 * (r * n + c + 2), _mm_unpackhi_ps(real1, imag1)); |
| } |
| |
| int r2 = r + n2; |
| int r3 = n - r2; |
| output[2 * (r2 * n + 0)] = packed[r3 * n]; |
| output[2 * (r2 * n + 0) + 1] = -packed[(r3 + n2) * n]; |
| output[2 * (r2 * n + n2)] = packed[r3 * n + n2]; |
| output[2 * (r2 * n + n2) + 1] = -packed[(r3 + n2) * n + n2]; |
| for (int c = 1; c < AOMMIN(4, n2); ++c) { |
| output[2 * (r2 * n + c)] = |
| packed[r3 * n + c] + packed[(r3 + n2) * n + c + n2]; |
| output[2 * (r2 * n + c) + 1] = |
| -packed[(r3 + n2) * n + c] + packed[r3 * n + c + n2]; |
| } |
| for (int c = 4; c < n2; c += 4) { |
| __m128 real1 = _mm_load_ps(packed + r3 * n + c); |
| __m128 real2 = _mm_load_ps(packed + (r3 + n2) * n + c + n2); |
| __m128 imag1 = _mm_load_ps(packed + (r3 + n2) * n + c); |
| __m128 imag2 = _mm_load_ps(packed + r3 * n + c + n2); |
| real1 = _mm_add_ps(real1, real2); |
| imag1 = _mm_sub_ps(imag2, imag1); |
| _mm_store_ps(output + 2 * (r2 * n + c), _mm_unpacklo_ps(real1, imag1)); |
| _mm_store_ps(output + 2 * (r2 * n + c + 2), |
| _mm_unpackhi_ps(real1, imag1)); |
| } |
| } |
| } |
| |
| // Generate definitions for 1d transforms using float and __mm128 |
| GEN_FFT_4(static inline void, sse2, float, __m128, _mm_load_ps, _mm_store_ps, |
| _mm_set1_ps, _mm_add_ps, _mm_sub_ps) |
| GEN_FFT_8(static inline void, sse2, float, __m128, _mm_load_ps, _mm_store_ps, |
| _mm_set1_ps, _mm_add_ps, _mm_sub_ps, _mm_mul_ps) |
| GEN_FFT_16(static inline void, sse2, float, __m128, _mm_load_ps, _mm_store_ps, |
| _mm_set1_ps, _mm_add_ps, _mm_sub_ps, _mm_mul_ps) |
| GEN_FFT_32(static inline void, sse2, float, __m128, _mm_load_ps, _mm_store_ps, |
| _mm_set1_ps, _mm_add_ps, _mm_sub_ps, _mm_mul_ps) |
| |
| void aom_fft4x4_float_sse2(const float *input, float *temp, float *output) { |
| aom_fft_2d_gen(input, temp, output, 4, aom_fft1d_4_sse2, |
| aom_transpose_float_sse2, aom_fft_unpack_2d_output_sse2, 4); |
| } |
| |
| void aom_fft8x8_float_sse2(const float *input, float *temp, float *output) { |
| aom_fft_2d_gen(input, temp, output, 8, aom_fft1d_8_sse2, |
| aom_transpose_float_sse2, aom_fft_unpack_2d_output_sse2, 4); |
| } |
| |
| void aom_fft16x16_float_sse2(const float *input, float *temp, float *output) { |
| aom_fft_2d_gen(input, temp, output, 16, aom_fft1d_16_sse2, |
| aom_transpose_float_sse2, aom_fft_unpack_2d_output_sse2, 4); |
| } |
| |
| void aom_fft32x32_float_sse2(const float *input, float *temp, float *output) { |
| aom_fft_2d_gen(input, temp, output, 32, aom_fft1d_32_sse2, |
| aom_transpose_float_sse2, aom_fft_unpack_2d_output_sse2, 4); |
| } |
| |
| // Generate definitions for 1d inverse transforms using float and mm128 |
| GEN_IFFT_4(static inline void, sse2, float, __m128, _mm_load_ps, _mm_store_ps, |
| _mm_set1_ps, _mm_add_ps, _mm_sub_ps) |
| GEN_IFFT_8(static inline void, sse2, float, __m128, _mm_load_ps, _mm_store_ps, |
| _mm_set1_ps, _mm_add_ps, _mm_sub_ps, _mm_mul_ps) |
| GEN_IFFT_16(static inline void, sse2, float, __m128, _mm_load_ps, _mm_store_ps, |
| _mm_set1_ps, _mm_add_ps, _mm_sub_ps, _mm_mul_ps) |
| GEN_IFFT_32(static inline void, sse2, float, __m128, _mm_load_ps, _mm_store_ps, |
| _mm_set1_ps, _mm_add_ps, _mm_sub_ps, _mm_mul_ps) |
| |
| void aom_ifft4x4_float_sse2(const float *input, float *temp, float *output) { |
| aom_ifft_2d_gen(input, temp, output, 4, aom_fft1d_4_float, aom_fft1d_4_sse2, |
| aom_ifft1d_4_sse2, aom_transpose_float_sse2, 4); |
| } |
| |
| void aom_ifft8x8_float_sse2(const float *input, float *temp, float *output) { |
| aom_ifft_2d_gen(input, temp, output, 8, aom_fft1d_8_float, aom_fft1d_8_sse2, |
| aom_ifft1d_8_sse2, aom_transpose_float_sse2, 4); |
| } |
| |
| void aom_ifft16x16_float_sse2(const float *input, float *temp, float *output) { |
| aom_ifft_2d_gen(input, temp, output, 16, aom_fft1d_16_float, |
| aom_fft1d_16_sse2, aom_ifft1d_16_sse2, |
| aom_transpose_float_sse2, 4); |
| } |
| |
| void aom_ifft32x32_float_sse2(const float *input, float *temp, float *output) { |
| aom_ifft_2d_gen(input, temp, output, 32, aom_fft1d_32_float, |
| aom_fft1d_32_sse2, aom_ifft1d_32_sse2, |
| aom_transpose_float_sse2, 4); |
| } |