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 15void x86SP_FFT_CToC_FC32_Inv_Radix2_ls_sse( 16 const OMX_F32 *in, 17 OMX_F32 *out, 18 const OMX_F32 *twiddle, 19 OMX_INT n) { 20 OMX_F32 *out0 =out; 21 OMX_INT i; 22 23 for (i = 0; i < n; i += 8) { 24 VC v_tw; 25 VC v_t0; 26 VC v_t1; 27 VC v_temp; 28 29 // Load twiddle 30 const OMX_F32 *tw = twiddle + i; 31 v_tw.real = _mm_set_ps(tw[6], tw[4], tw[2], tw[0]); 32 const OMX_F32 * twi = tw + (n << 1); 33 v_tw.imag = _mm_set_ps(twi[6], twi[4], twi[2], twi[0]); 34 35 // Load real part 36 const OMX_F32 *t = in + i; 37 VC_LOAD_SHUFFLE(&(v_t0.real), &(v_t1.real), t); 38 39 // Load imag part 40 t = t + n; 41 VC_LOAD_SHUFFLE(&(v_t0.imag), &(v_t1.imag), t); 42 43 OMX_F32 *out1 = out0 + (n >> 1); 44 VC_CONJ_MUL(&v_temp, &v_tw, &v_t1); 45 46 VC_SUB_STORE_SPLIT(out1, &v_t0, &v_temp, n); 47 48 VC_ADD_STORE_SPLIT(out0, &v_t0, &v_temp, n); 49 50 out0 += 4; 51 } 52} 53