| /* |
| * Copyright (c) 2013 The WebRTC 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 "dl/api/omxtypes.h" |
| #include "dl/sp/src/x86/x86SP_SSE_Math.h" |
| |
| void x86SP_FFT_CToC_FC32_Fwd_Radix4_ls_sse( |
| const OMX_F32 *in, |
| OMX_F32 *out, |
| const OMX_F32 *twiddle, |
| OMX_INT n) { |
| OMX_INT n_by_2 = n >> 1; |
| OMX_INT n_by_4 = n >> 2; |
| OMX_INT n_mul_2 = n << 1; |
| OMX_INT i; |
| |
| OMX_F32 *out0 = out; |
| |
| for (i = 0; i < n_by_2; i += 8) { |
| const OMX_F32 *tw1 = twiddle + i; |
| const OMX_F32 *tw2 = tw1 + i; |
| const OMX_F32 *tw3 = tw2 + i; |
| const OMX_F32 *in0 = in + (i << 1); |
| const OMX_F32 *in1 = in0 + 4; |
| const OMX_F32 *in2 = in1 + 4; |
| const OMX_F32 *in3 = in2 + 4; |
| OMX_F32 *out1 = out0 + n_by_4; |
| OMX_F32 *out2 = out1 + n_by_4; |
| OMX_F32 *out3 = out2 + n_by_4; |
| |
| VC v_tw1; |
| VC v_tw2; |
| VC v_tw3; |
| VC v_t0; |
| VC v_t1; |
| VC v_t2; |
| VC v_t3; |
| VC v_t4; |
| VC v_t5; |
| VC v_t6; |
| VC v_t7; |
| |
| v_tw1.real = _mm_set_ps(tw1[6], tw1[4], tw1[2], tw1[0]); |
| v_tw1.imag = _mm_set_ps( |
| tw1[6 + n_mul_2], |
| tw1[4 + n_mul_2], |
| tw1[2 + n_mul_2], |
| tw1[n_mul_2]); |
| v_tw2.real = _mm_set_ps(tw2[12], tw2[8], tw2[4], tw2[0]); |
| v_tw2.imag = _mm_set_ps( |
| tw2[12 + n_mul_2], |
| tw2[8 + n_mul_2], |
| tw2[4 + n_mul_2], |
| tw2[n_mul_2]); |
| v_tw3.real = _mm_set_ps(tw3[18], tw3[12], tw3[6], tw3[0]); |
| v_tw3.imag = _mm_set_ps( |
| tw3[18 + n_mul_2], |
| tw3[12 + n_mul_2], |
| tw3[6 + n_mul_2], |
| tw3[n_mul_2]); |
| |
| VC_LOAD_MATRIX_TRANSPOSE(&v_t0, &v_t1, &v_t2, &v_t3, in0, in1, in2, in3, n); |
| |
| RADIX4_FWD_BUTTERFLY(&v_t4, &v_t5, &v_t6, &v_t7, |
| &v_tw1, &v_tw2, &v_tw3, |
| &v_t0, &v_t1, &v_t2, &v_t3); |
| |
| RADIX4_FWD_BUTTERFLY_STORE(out0, out1, out2, out3, |
| &v_t4, &v_t5, &v_t6, &v_t7, n); |
| |
| out0 += 4; |
| } |
| } |