--- /dev/null
+/* -------------------------------------------------------------- */
+/* (C)Copyright 2001,2007, */
+/* International Business Machines Corporation, */
+/* Sony Computer Entertainment, Incorporated, */
+/* Toshiba Corporation, */
+/* */
+/* All Rights Reserved. */
+/* */
+/* Redistribution and use in source and binary forms, with or */
+/* without modification, are permitted provided that the */
+/* following conditions are met: */
+/* */
+/* - Redistributions of source code must retain the above copyright*/
+/* notice, this list of conditions and the following disclaimer. */
+/* */
+/* - Redistributions in binary form must reproduce the above */
+/* copyright notice, this list of conditions and the following */
+/* disclaimer in the documentation and/or other materials */
+/* provided with the distribution. */
+/* */
+/* - Neither the name of IBM Corporation nor the names of its */
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+/* derived from this software without specific prior written */
+/* permission. */
+/* */
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+/* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, */
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+/* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; */
+/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) */
+/* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN */
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+/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+/* -------------------------------------------------------------- */
+/* PROLOG END TAG zYx */
+#ifndef _FFT_1D_R2_H_
+#define _FFT_1D_R2_H_ 1
+
+#include "fft_1d.h"
+
+/* fft_1d_r2
+ * ---------
+ * Performs a single precision, complex Fast Fourier Transform using
+ * the DFT (Discrete Fourier Transform) with radix-2 decimation in time.
+ * The input <in> is an array of complex numbers of length (1<<log2_size)
+ * entries. The result is returned in the array of complex numbers specified
+ * by <out>. Note: This routine can support an in-place transformation
+ * by specifying <in> and <out> to be the same array.
+ *
+ * This implementation utilizes the Cooley-Tukey algorithm consisting
+ * of <log2_size> stages. The basic operation is the butterfly.
+ *
+ * p --------------------------> P = p + q*Wi
+ * \ /
+ * \ /
+ * \ /
+ * \/
+ * /\
+ * / \
+ * / \
+ * ____ / \
+ * q --| Wi |-----------------> Q = p - q*Wi
+ * ----
+ *
+ * This routine also requires pre-computed twiddle values, W. W is an
+ * array of single precision complex numbers of length 1<<(log2_size-2)
+ * and is computed as follows:
+ *
+ * for (i=0; i<n/4; i++)
+ * W[i].real = cos(i * 2*PI/n);
+ * W[i].imag = -sin(i * 2*PI/n);
+ * }
+ *
+ * This array actually only contains the first half of the twiddle
+ * factors. Due for symmetry, the second half of the twiddle factors
+ * are implied and equal:
+ *
+ * for (i=0; i<n/4; i++)
+ * W[i+n/4].real = W[i].imag = sin(i * 2*PI/n);
+ * W[i+n/4].imag = -W[i].real = -cos(i * 2*PI/n);
+ * }
+ *
+ * Further symmetry allows one to generate the twiddle factor table
+ * using half the number of trig computations as follows:
+ *
+ * W[0].real = 1.0;
+ * W[0].imag = 0.0;
+ * for (i=1; i<n/4; i++)
+ * W[i].real = cos(i * 2*PI/n);
+ * W[n/4 - i].imag = -W[i].real;
+ * }
+ *
+ * The complex numbers are packed into quadwords as follows:
+ *
+ * quadword complex
+ * array element array elements
+ * -----------------------------------------------------
+ * i | real 2*i | imag 2*i | real 2*i+1 | imag 2*i+1 |
+ * -----------------------------------------------------
+ *
+ */
+
+
+static __inline void _fft_1d_r2(vector float *out, vector float *in, vector float *W, int log2_size)
+{
+ int i, j, k;
+ int stage, offset;
+ int i_rev;
+ int n, n_2, n_4, n_8, n_16, n_3_16;
+ int w_stride, w_2stride, w_3stride, w_4stride;
+ int stride, stride_2, stride_4, stride_3_4;
+ vector float *W0, *W1, *W2, *W3;
+ vector float *re0, *re1, *re2, *re3;
+ vector float *im0, *im1, *im2, *im3;
+ vector float *in0, *in1, *in2, *in3, *in4, *in5, *in6, *in7;
+ vector float *out0, *out1, *out2, *out3;
+ vector float tmp0, tmp1;
+ vector float w0_re, w0_im, w1_re, w1_im;
+ vector float w0, w1, w2, w3;
+ vector float src_lo0, src_lo1, src_lo2, src_lo3;
+ vector float src_hi0, src_hi1, src_hi2, src_hi3;
+ vector float dst_lo0, dst_lo1, dst_lo2, dst_lo3;
+ vector float dst_hi0, dst_hi1, dst_hi2, dst_hi3;
+ vector float out_re_lo0, out_re_lo1, out_re_lo2, out_re_lo3;
+ vector float out_im_lo0, out_im_lo1, out_im_lo2, out_im_lo3;
+ vector float out_re_hi0, out_re_hi1, out_re_hi2, out_re_hi3;
+ vector float out_im_hi0, out_im_hi1, out_im_hi2, out_im_hi3;
+ vector float re_lo0, re_lo1, re_lo2, re_lo3;
+ vector float im_lo0, im_lo1, im_lo2, im_lo3;
+ vector float re_hi0, re_hi1, re_hi2, re_hi3;
+ vector float im_hi0, im_hi1, im_hi2, im_hi3;
+ vector float pq_lo0, pq_lo1, pq_lo2, pq_lo3;
+ vector float pq_hi0, pq_hi1, pq_hi2, pq_hi3;
+ vector float re[MAX_FFT_1D_SIZE/4], im[MAX_FFT_1D_SIZE/4]; /* real & imaginary working arrays */
+ vector float ppmm = (vector float) { 1.0f, 1.0f, -1.0f, -1.0f};
+ vector float pmmp = (vector float) { 1.0f, -1.0f, -1.0f, 1.0f};
+ vector unsigned char reverse;
+ vector unsigned char shuf_lo = (vector unsigned char) {
+ 0, 1, 2, 3, 4, 5, 6, 7,
+ 16,17,18,19, 20,21,22,23};
+ vector unsigned char shuf_hi = (vector unsigned char) {
+ 8, 9,10,11, 12,13,14,15,
+ 24,25,26,27, 28,29,30,31};
+ vector unsigned char shuf_0202 = (vector unsigned char) {
+ 0, 1, 2, 3, 8, 9,10,11,
+ 0, 1, 2, 3, 8, 9,10,11};
+ vector unsigned char shuf_1313 = (vector unsigned char) {
+ 4, 5, 6, 7, 12,13,14,15,
+ 4, 5, 6, 7, 12,13,14,15};
+ vector unsigned char shuf_0303 = (vector unsigned char) {
+ 0, 1, 2, 3, 12,13,14,15,
+ 0, 1, 2, 3, 12,13,14,15};
+ vector unsigned char shuf_1212 = (vector unsigned char) {
+ 4, 5, 6, 7, 8, 9,10,11,
+ 4, 5, 6, 7, 8, 9,10,11};
+ vector unsigned char shuf_0415 = (vector unsigned char) {
+ 0, 1, 2, 3, 16,17,18,19,
+ 4, 5, 6, 7, 20,21,22,23};
+ vector unsigned char shuf_2637 = (vector unsigned char) {
+ 8, 9,10,11, 24,25,26,27,
+ 12,13,14,15,28,29,30,31};
+ vector unsigned char shuf_0246 = (vector unsigned char) {
+ 0, 1, 2, 3, 8, 9,10,11,
+ 16,17,18,19,24,25,26,27};
+ vector unsigned char shuf_1357 = (vector unsigned char) {
+ 4, 5, 6, 7, 12,13,14,15,
+ 20,21,22,23,28,29,30,31};
+
+ n = 1 << log2_size;
+ n_2 = n >> 1;
+ n_4 = n >> 2;
+ n_8 = n >> 3;
+ n_16 = n >> 4;
+
+ n_3_16 = n_8 + n_16;
+
+ /* Compute a byte reverse shuffle pattern to be used to produce
+ * an address bit swap.
+ */
+ reverse = spu_or(spu_slqwbyte(spu_splats((unsigned char)0x80), log2_size),
+ spu_rlmaskqwbyte(((vec_uchar16){15,14,13,12, 11,10,9,8,
+ 7, 6, 5, 4, 3, 2,1,0}),
+ log2_size-16));
+
+ /* Perform the first 3 stages of the FFT. These stages differs from
+ * other stages in that the inputs are unscrambled and the data is
+ * reformated into parallel arrays (ie, seperate real and imaginary
+ * arrays). The term "unscramble" means the bit address reverse the
+ * data array. In addition, the first three stages have simple twiddle
+ * weighting factors.
+ * stage 1: (1, 0)
+ * stage 2: (1, 0) and (0, -1)
+ * stage 3: (1, 0), (0.707, -0.707), (0, -1), (-0.707, -0.707)
+ *
+ * The arrays are processed as two halves, simultaneously. The lo (first
+ * half) and hi (second half). This is done because the scramble
+ * shares source value between each half of the output arrays.
+ */
+ i = 0;
+ i_rev = 0;
+
+ in0 = in;
+ in1 = in + n_8;
+ in2 = in + n_16;
+ in3 = in + n_3_16;
+
+ in4 = in + n_4;
+ in5 = in1 + n_4;
+ in6 = in2 + n_4;
+ in7 = in3 + n_4;
+
+ re0 = re;
+ re1 = re + n_8;
+ im0 = im;
+ im1 = im + n_8;
+
+ w0_re = (vector float) { 1.0f, INV_SQRT_2, 0.0f, -INV_SQRT_2};
+ w0_im = (vector float) { 0.0f, -INV_SQRT_2, -1.0f, -INV_SQRT_2};
+
+ do {
+ src_lo0 = in0[i_rev];
+ src_lo1 = in1[i_rev];
+ src_lo2 = in2[i_rev];
+ src_lo3 = in3[i_rev];
+
+ src_hi0 = in4[i_rev];
+ src_hi1 = in5[i_rev];
+ src_hi2 = in6[i_rev];
+ src_hi3 = in7[i_rev];
+
+ /* Perform scramble.
+ */
+ dst_lo0 = spu_shuffle(src_lo0, src_hi0, shuf_lo);
+ dst_hi0 = spu_shuffle(src_lo0, src_hi0, shuf_hi);
+ dst_lo1 = spu_shuffle(src_lo1, src_hi1, shuf_lo);
+ dst_hi1 = spu_shuffle(src_lo1, src_hi1, shuf_hi);
+ dst_lo2 = spu_shuffle(src_lo2, src_hi2, shuf_lo);
+ dst_hi2 = spu_shuffle(src_lo2, src_hi2, shuf_hi);
+ dst_lo3 = spu_shuffle(src_lo3, src_hi3, shuf_lo);
+ dst_hi3 = spu_shuffle(src_lo3, src_hi3, shuf_hi);
+
+ /* Perform the stage 1 butterfly. The multiplier constant, ppmm,
+ * is used to control the sign of the operands since a single
+ * quadword contains both of P and Q valule of the butterfly.
+ */
+ pq_lo0 = spu_madd(ppmm, dst_lo0, spu_rlqwbyte(dst_lo0, 8));
+ pq_hi0 = spu_madd(ppmm, dst_hi0, spu_rlqwbyte(dst_hi0, 8));
+ pq_lo1 = spu_madd(ppmm, dst_lo1, spu_rlqwbyte(dst_lo1, 8));
+ pq_hi1 = spu_madd(ppmm, dst_hi1, spu_rlqwbyte(dst_hi1, 8));
+ pq_lo2 = spu_madd(ppmm, dst_lo2, spu_rlqwbyte(dst_lo2, 8));
+ pq_hi2 = spu_madd(ppmm, dst_hi2, spu_rlqwbyte(dst_hi2, 8));
+ pq_lo3 = spu_madd(ppmm, dst_lo3, spu_rlqwbyte(dst_lo3, 8));
+ pq_hi3 = spu_madd(ppmm, dst_hi3, spu_rlqwbyte(dst_hi3, 8));
+
+ /* Perfrom the stage 2 butterfly. For this stage, the
+ * inputs pq are still interleaved (p.real, p.imag, q.real,
+ * q.imag), so we must first re-order the data into
+ * parallel arrays as well as perform the reorder
+ * associated with the twiddle W[n/4], which equals
+ * (0, -1).
+ *
+ * ie. (A, B) * (0, -1) => (B, -A)
+ */
+ re_lo0 = spu_madd(ppmm,
+ spu_shuffle(pq_lo1, pq_lo1, shuf_0303),
+ spu_shuffle(pq_lo0, pq_lo0, shuf_0202));
+ im_lo0 = spu_madd(pmmp,
+ spu_shuffle(pq_lo1, pq_lo1, shuf_1212),
+ spu_shuffle(pq_lo0, pq_lo0, shuf_1313));
+
+ re_lo1 = spu_madd(ppmm,
+ spu_shuffle(pq_lo3, pq_lo3, shuf_0303),
+ spu_shuffle(pq_lo2, pq_lo2, shuf_0202));
+ im_lo1 = spu_madd(pmmp,
+ spu_shuffle(pq_lo3, pq_lo3, shuf_1212),
+ spu_shuffle(pq_lo2, pq_lo2, shuf_1313));
+
+
+ re_hi0 = spu_madd(ppmm,
+ spu_shuffle(pq_hi1, pq_hi1, shuf_0303),
+ spu_shuffle(pq_hi0, pq_hi0, shuf_0202));
+ im_hi0 = spu_madd(pmmp,
+ spu_shuffle(pq_hi1, pq_hi1, shuf_1212),
+ spu_shuffle(pq_hi0, pq_hi0, shuf_1313));
+
+ re_hi1 = spu_madd(ppmm,
+ spu_shuffle(pq_hi3, pq_hi3, shuf_0303),
+ spu_shuffle(pq_hi2, pq_hi2, shuf_0202));
+ im_hi1 = spu_madd(pmmp,
+ spu_shuffle(pq_hi3, pq_hi3, shuf_1212),
+ spu_shuffle(pq_hi2, pq_hi2, shuf_1313));
+
+
+ /* Perform stage 3 butterfly.
+ */
+ FFT_1D_BUTTERFLY(re0[0], im0[0], re0[1], im0[1], re_lo0, im_lo0, re_lo1, im_lo1, w0_re, w0_im);
+ FFT_1D_BUTTERFLY(re1[0], im1[0], re1[1], im1[1], re_hi0, im_hi0, re_hi1, im_hi1, w0_re, w0_im);
+
+ re0 += 2;
+ re1 += 2;
+ im0 += 2;
+ im1 += 2;
+
+ i += 8;
+ i_rev = BIT_SWAP(i, reverse) / 2;
+ } while (i < n_2);
+
+ /* Process stages 4 to log2_size-2
+ */
+ for (stage=4, stride=4; stage<log2_size-1; stage++, stride += stride) {
+ w_stride = n_2 >> stage;
+ w_2stride = n >> stage;
+ w_3stride = w_stride + w_2stride;
+ w_4stride = w_2stride + w_2stride;
+
+ W0 = W;
+ W1 = W + w_stride;
+ W2 = W + w_2stride;
+ W3 = W + w_3stride;
+
+ stride_2 = stride >> 1;
+ stride_4 = stride >> 2;
+ stride_3_4 = stride_2 + stride_4;
+
+ re0 = re; im0 = im;
+ re1 = re + stride_2; im1 = im + stride_2;
+ re2 = re + stride_4; im2 = im + stride_4;
+ re3 = re + stride_3_4; im3 = im + stride_3_4;
+
+ for (i=0, offset=0; i<stride_4; i++, offset += w_4stride) {
+ /* Compute the twiddle factors
+ */
+ w0 = W0[offset];
+ w1 = W1[offset];
+ w2 = W2[offset];
+ w3 = W3[offset];
+
+ tmp0 = spu_shuffle(w0, w2, shuf_0415);
+ tmp1 = spu_shuffle(w1, w3, shuf_0415);
+
+ w0_re = spu_shuffle(tmp0, tmp1, shuf_0415);
+ w0_im = spu_shuffle(tmp0, tmp1, shuf_2637);
+
+ j = i;
+ k = i + stride;
+ do {
+ re_lo0 = re0[j]; im_lo0 = im0[j];
+ re_lo1 = re1[j]; im_lo1 = im1[j];
+
+ re_hi0 = re2[j]; im_hi0 = im2[j];
+ re_hi1 = re3[j]; im_hi1 = im3[j];
+
+ re_lo2 = re0[k]; im_lo2 = im0[k];
+ re_lo3 = re1[k]; im_lo3 = im1[k];
+
+ re_hi2 = re2[k]; im_hi2 = im2[k];
+ re_hi3 = re3[k]; im_hi3 = im3[k];
+
+ FFT_1D_BUTTERFLY (re0[j], im0[j], re1[j], im1[j], re_lo0, im_lo0, re_lo1, im_lo1, w0_re, w0_im);
+ FFT_1D_BUTTERFLY_HI(re2[j], im2[j], re3[j], im3[j], re_hi0, im_hi0, re_hi1, im_hi1, w0_re, w0_im);
+
+ FFT_1D_BUTTERFLY (re0[k], im0[k], re1[k], im1[k], re_lo2, im_lo2, re_lo3, im_lo3, w0_re, w0_im);
+ FFT_1D_BUTTERFLY_HI(re2[k], im2[k], re3[k], im3[k], re_hi2, im_hi2, re_hi3, im_hi3, w0_re, w0_im);
+
+ j += 2 * stride;
+ k += 2 * stride;
+ } while (j < n_4);
+ }
+ }
+
+ /* Process stage log2_size-1. This is identical to the stage processing above
+ * except for this stage the inner loop is only executed once so it is removed
+ * entirely.
+ */
+ w_stride = n_2 >> stage;
+ w_2stride = n >> stage;
+ w_3stride = w_stride + w_2stride;
+ w_4stride = w_2stride + w_2stride;
+
+ stride_2 = stride >> 1;
+ stride_4 = stride >> 2;
+
+ stride_3_4 = stride_2 + stride_4;
+
+ re0 = re; im0 = im;
+ re1 = re + stride_2; im1 = im + stride_2;
+ re2 = re + stride_4; im2 = im + stride_4;
+ re3 = re + stride_3_4; im3 = im + stride_3_4;
+
+ for (i=0, offset=0; i<stride_4; i++, offset += w_4stride) {
+ /* Compute the twiddle factors
+ */
+ w0 = W[offset];
+ w1 = W[offset + w_stride];
+ w2 = W[offset + w_2stride];
+ w3 = W[offset + w_3stride];
+
+ tmp0 = spu_shuffle(w0, w2, shuf_0415);
+ tmp1 = spu_shuffle(w1, w3, shuf_0415);
+
+ w0_re = spu_shuffle(tmp0, tmp1, shuf_0415);
+ w0_im = spu_shuffle(tmp0, tmp1, shuf_2637);
+
+ j = i;
+ k = i + stride;
+
+ re_lo0 = re0[j]; im_lo0 = im0[j];
+ re_lo1 = re1[j]; im_lo1 = im1[j];
+
+ re_hi0 = re2[j]; im_hi0 = im2[j];
+ re_hi1 = re3[j]; im_hi1 = im3[j];
+
+ re_lo2 = re0[k]; im_lo2 = im0[k];
+ re_lo3 = re1[k]; im_lo3 = im1[k];
+
+ re_hi2 = re2[k]; im_hi2 = im2[k];
+ re_hi3 = re3[k]; im_hi3 = im3[k];
+
+ FFT_1D_BUTTERFLY (re0[j], im0[j], re1[j], im1[j], re_lo0, im_lo0, re_lo1, im_lo1, w0_re, w0_im);
+ FFT_1D_BUTTERFLY_HI(re2[j], im2[j], re3[j], im3[j], re_hi0, im_hi0, re_hi1, im_hi1, w0_re, w0_im);
+
+ FFT_1D_BUTTERFLY (re0[k], im0[k], re1[k], im1[k], re_lo2, im_lo2, re_lo3, im_lo3, w0_re, w0_im);
+ FFT_1D_BUTTERFLY_HI(re2[k], im2[k], re3[k], im3[k], re_hi2, im_hi2, re_hi3, im_hi3, w0_re, w0_im);
+ }
+
+
+ /* Process the final stage (stage log2_size). For this stage,
+ * reformat the data from parallel arrays back into
+ * interleaved arrays,storing the result into <in>.
+ *
+ * This loop has been manually unrolled by 2 to improve
+ * dual issue rates and reduce stalls. This unrolling
+ * forces a minimum FFT size of 32.
+ */
+ re0 = re;
+ re1 = re + n_8;
+ re2 = re + n_16;
+ re3 = re + n_3_16;
+
+ im0 = im;
+ im1 = im + n_8;
+ im2 = im + n_16;
+ im3 = im + n_3_16;
+
+ out0 = out;
+ out1 = out + n_4;
+ out2 = out + n_8;
+ out3 = out1 + n_8;
+
+ i = n_16;
+
+ do {
+ /* Fetch the twiddle factors
+ */
+ w0 = W[0];
+ w1 = W[1];
+ w2 = W[2];
+ w3 = W[3];
+
+ W += 4;
+
+ w0_re = spu_shuffle(w0, w1, shuf_0246);
+ w0_im = spu_shuffle(w0, w1, shuf_1357);
+ w1_re = spu_shuffle(w2, w3, shuf_0246);
+ w1_im = spu_shuffle(w2, w3, shuf_1357);
+
+ /* Fetch the butterfly inputs, reals and imaginaries
+ */
+ re_lo0 = re0[0]; im_lo0 = im0[0];
+ re_lo1 = re1[0]; im_lo1 = im1[0];
+ re_lo2 = re0[1]; im_lo2 = im0[1];
+ re_lo3 = re1[1]; im_lo3 = im1[1];
+
+ re_hi0 = re2[0]; im_hi0 = im2[0];
+ re_hi1 = re3[0]; im_hi1 = im3[0];
+ re_hi2 = re2[1]; im_hi2 = im2[1];
+ re_hi3 = re3[1]; im_hi3 = im3[1];
+
+ re0 += 2; im0 += 2;
+ re1 += 2; im1 += 2;
+ re2 += 2; im2 += 2;
+ re3 += 2; im3 += 2;
+
+ /* Perform the butterflys
+ */
+ FFT_1D_BUTTERFLY (out_re_lo0, out_im_lo0, out_re_lo1, out_im_lo1, re_lo0, im_lo0, re_lo1, im_lo1, w0_re, w0_im);
+ FFT_1D_BUTTERFLY (out_re_lo2, out_im_lo2, out_re_lo3, out_im_lo3, re_lo2, im_lo2, re_lo3, im_lo3, w1_re, w1_im);
+
+ FFT_1D_BUTTERFLY_HI(out_re_hi0, out_im_hi0, out_re_hi1, out_im_hi1, re_hi0, im_hi0, re_hi1, im_hi1, w0_re, w0_im);
+ FFT_1D_BUTTERFLY_HI(out_re_hi2, out_im_hi2, out_re_hi3, out_im_hi3, re_hi2, im_hi2, re_hi3, im_hi3, w1_re, w1_im);
+
+ /* Interleave the results and store them into the output buffers (ie,
+ * the original input buffers.
+ */
+ out0[0] = spu_shuffle(out_re_lo0, out_im_lo0, shuf_0415);
+ out0[1] = spu_shuffle(out_re_lo0, out_im_lo0, shuf_2637);
+ out0[2] = spu_shuffle(out_re_lo2, out_im_lo2, shuf_0415);
+ out0[3] = spu_shuffle(out_re_lo2, out_im_lo2, shuf_2637);
+
+ out1[0] = spu_shuffle(out_re_lo1, out_im_lo1, shuf_0415);
+ out1[1] = spu_shuffle(out_re_lo1, out_im_lo1, shuf_2637);
+ out1[2] = spu_shuffle(out_re_lo3, out_im_lo3, shuf_0415);
+ out1[3] = spu_shuffle(out_re_lo3, out_im_lo3, shuf_2637);
+
+ out2[0] = spu_shuffle(out_re_hi0, out_im_hi0, shuf_0415);
+ out2[1] = spu_shuffle(out_re_hi0, out_im_hi0, shuf_2637);
+ out2[2] = spu_shuffle(out_re_hi2, out_im_hi2, shuf_0415);
+ out2[3] = spu_shuffle(out_re_hi2, out_im_hi2, shuf_2637);
+
+ out3[0] = spu_shuffle(out_re_hi1, out_im_hi1, shuf_0415);
+ out3[1] = spu_shuffle(out_re_hi1, out_im_hi1, shuf_2637);
+ out3[2] = spu_shuffle(out_re_hi3, out_im_hi3, shuf_0415);
+ out3[3] = spu_shuffle(out_re_hi3, out_im_hi3, shuf_2637);
+
+ out0 += 4;
+ out1 += 4;
+ out2 += 4;
+ out3 += 4;
+
+ i -= 2;
+ } while (i);
+}
+
+#endif /* _FFT_1D_R2_H_ */
projects / debian / gnuradio / blobdiff