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_Inv_Radix4_ls_sse( 16 const OMX_F32 *in, 17 OMX_F32 *out, 18 const OMX_F32 *twiddle, 19 OMX_INT n) { 20 OMX_INT n_by_2 = n >> 1; 21 OMX_INT n_by_4 = n >> 2; 22 OMX_INT n_mul_2 = n << 1; 23 OMX_INT i; 24 25 OMX_F32 *out0 = out; 26 27 for (i = 0; i < n_by_2; i += 8) { 28 const OMX_F32 *tw1 = twiddle + i; 29 const OMX_F32 *tw2 = tw1 + i; 30 const OMX_F32 *tw3 = tw2 + i; 31 const OMX_F32 *in0 = in + (i << 1); 32 const OMX_F32 *in1 = in0 + 4; 33 const OMX_F32 *in2 = in1 + 4; 34 const OMX_F32 *in3 = in2 + 4; 35 OMX_F32 *out1 = out0 + n_by_4; 36 OMX_F32 *out2 = out1 + n_by_4; 37 OMX_F32 *out3 = out2 + n_by_4; 38 39 VC v_tw1; 40 VC v_tw2; 41 VC v_tw3; 42 VC v_t0; 43 VC v_t1; 44 VC v_t2; 45 VC v_t3; 46 VC v_t4; 47 VC v_t5; 48 VC v_t6; 49 VC v_t7; 50 51 v_tw1.real = _mm_set_ps(tw1[6], tw1[4], tw1[2], tw1[0]); 52 v_tw1.imag = _mm_set_ps( 53 tw1[6 + n_mul_2], 54 tw1[4 + n_mul_2], 55 tw1[2 + n_mul_2], 56 tw1[n_mul_2]); 57 v_tw2.real = _mm_set_ps(tw2[12], tw2[8], tw2[4], tw2[0]); 58 v_tw2.imag = _mm_set_ps( 59 tw2[12 + n_mul_2], 60 tw2[8 + n_mul_2], 61 tw2[4 + n_mul_2], 62 tw2[n_mul_2]); 63 v_tw3.real = _mm_set_ps(tw3[18], tw3[12], tw3[6], tw3[0]); 64 v_tw3.imag = _mm_set_ps( 65 tw3[18 + n_mul_2], 66 tw3[12 + n_mul_2], 67 tw3[6 + n_mul_2], 68 tw3[n_mul_2]); 69 70 VC_LOAD_MATRIX_TRANSPOSE(&v_t0, &v_t1, &v_t2, &v_t3, in0, in1, in2, in3, n); 71 72 RADIX4_INV_BUTTERFLY(&v_t4, &v_t5, &v_t6, &v_t7, 73 &v_tw1, &v_tw2, &v_tw3, 74 &v_t0, &v_t1, &v_t2, &v_t3); 75 76 RADIX4_INV_BUTTERFLY_STORE(out0, out1, out2, out3, 77 &v_t4, &v_t5, &v_t6, &v_t7, n); 78 79 out0 += 4; 80 } 81 } 82
