1 /* 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 * 10 */ 11 12 #include "dl/api/omxtypes.h" 13 #include "dl/sp/src/x86/x86SP_SSE_Math.h" 14 15 void x86SP_FFT_CToC_FC32_Fwd_Radix4_fs_sse( 16 const OMX_F32 *in, 17 OMX_F32 *out, 18 OMX_INT n) { 19 OMX_INT i; 20 OMX_INT n_by_2 = n >> 1; 21 OMX_INT n_by_4 = n >> 2; 22 OMX_F32 *out0 = out; 23 24 for (i = 0; i < n_by_2; i += 8) { 25 VC v_t0; 26 VC v_t1; 27 VC v_t2; 28 VC v_t3; 29 VC v_t4; 30 VC v_t5; 31 VC v_t6; 32 VC v_t7; 33 34 const OMX_F32 *in0 = in + i; 35 const OMX_F32 *in1 = in0 + n_by_2; 36 const OMX_F32 *in2 = in1 + n_by_2; 37 const OMX_F32 *in3 = in2 + n_by_2; 38 39 OMX_F32 *out1 = out0 + n_by_4; 40 OMX_F32 *out2 = out1 + n_by_4; 41 OMX_F32 *out3 = out2 + n_by_4; 42 43 VC_LOAD_SHUFFLE(&(v_t0.real), &(v_t0.imag), in0); 44 VC_LOAD_SHUFFLE(&(v_t1.real), &(v_t1.imag), in1); 45 VC_LOAD_SHUFFLE(&(v_t2.real), &(v_t2.imag), in2); 46 VC_LOAD_SHUFFLE(&(v_t3.real), &(v_t3.imag), in3); 47 48 RADIX4_BUTTERFLY_FS(&v_t4, &v_t5, &v_t6, &v_t7, 49 &v_t0, &v_t1, &v_t2, &v_t3); 50 51 RADIX4_FWD_BUTTERFLY_STORE(out0, out1, out2, out3, 52 &v_t4, &v_t5, &v_t6, &v_t7, n); 53 54 out0 += 4; 55 } 56 } 57
