diff options
Diffstat (limited to 'sndobj/rfftw/fhb_3.c')
| -rw-r--r-- | sndobj/rfftw/fhb_3.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/sndobj/rfftw/fhb_3.c b/sndobj/rfftw/fhb_3.c new file mode 100644 index 0000000..abde8d0 --- /dev/null +++ b/sndobj/rfftw/fhb_3.c @@ -0,0 +1,158 @@ +/*
+ * Copyright (c) 1997-1999 Massachusetts Institute of Technology
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/* This file was automatically generated --- DO NOT EDIT */
+/* Generated on Sun Nov 7 20:45:09 EST 1999 */
+
+#include <fftw-int.h>
+#include <fftw.h>
+
+/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-backward 3 */
+
+/*
+ * This function contains 24 FP additions, 16 FP multiplications,
+ * (or, 16 additions, 8 multiplications, 8 fused multiply/add),
+ * 15 stack variables, and 24 memory accesses
+ */
+static const fftw_real K500000000 = FFTW_KONST(+0.500000000000000000000000000000000000000000000);
+static const fftw_real K866025403 = FFTW_KONST(+0.866025403784438646763723170752936183471402627);
+static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000);
+static const fftw_real K1_732050807 = FFTW_KONST(+1.732050807568877293527446341505872366942805254);
+
+/*
+ * Generator Id's :
+ * $Id: fhb_3.c,v 1.1.1.1 2006/05/12 15:14:52 veplaini Exp $
+ * $Id: fhb_3.c,v 1.1.1.1 2006/05/12 15:14:52 veplaini Exp $
+ * $Id: fhb_3.c,v 1.1.1.1 2006/05/12 15:14:52 veplaini Exp $
+ */
+
+void fftw_hc2hc_backward_3(fftw_real *A, const fftw_complex *W, int iostride, int m, int dist)
+{
+ int i;
+ fftw_real *X;
+ fftw_real *Y;
+ X = A;
+ Y = A + (3 * iostride);
+ {
+ fftw_real tmp30;
+ fftw_real tmp26;
+ fftw_real tmp27;
+ fftw_real tmp28;
+ fftw_real tmp29;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp29 = Y[-iostride];
+ tmp30 = K1_732050807 * tmp29;
+ tmp26 = X[0];
+ tmp27 = X[iostride];
+ tmp28 = tmp26 - tmp27;
+ X[0] = tmp26 + (K2_000000000 * tmp27);
+ X[iostride] = tmp28 - tmp30;
+ X[2 * iostride] = tmp28 + tmp30;
+ }
+ X = X + dist;
+ Y = Y - dist;
+ for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 2) {
+ fftw_real tmp6;
+ fftw_real tmp9;
+ fftw_real tmp15;
+ fftw_real tmp19;
+ fftw_real tmp10;
+ fftw_real tmp13;
+ fftw_real tmp16;
+ fftw_real tmp20;
+ ASSERT_ALIGNED_DOUBLE;
+ {
+ fftw_real tmp7;
+ fftw_real tmp8;
+ fftw_real tmp11;
+ fftw_real tmp12;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp6 = X[0];
+ tmp7 = X[iostride];
+ tmp8 = Y[-2 * iostride];
+ tmp9 = tmp7 + tmp8;
+ tmp15 = K866025403 * (tmp7 - tmp8);
+ tmp19 = tmp6 - (K500000000 * tmp9);
+ tmp10 = Y[0];
+ tmp11 = Y[-iostride];
+ tmp12 = X[2 * iostride];
+ tmp13 = tmp11 - tmp12;
+ tmp16 = tmp10 - (K500000000 * tmp13);
+ tmp20 = K866025403 * (tmp11 + tmp12);
+ }
+ X[0] = tmp6 + tmp9;
+ {
+ fftw_real tmp23;
+ fftw_real tmp25;
+ fftw_real tmp22;
+ fftw_real tmp24;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp23 = tmp16 - tmp15;
+ tmp25 = tmp19 + tmp20;
+ tmp22 = c_re(W[1]);
+ tmp24 = c_im(W[1]);
+ Y[0] = (tmp22 * tmp23) - (tmp24 * tmp25);
+ X[2 * iostride] = (tmp24 * tmp23) + (tmp22 * tmp25);
+ }
+ Y[-2 * iostride] = tmp10 + tmp13;
+ {
+ fftw_real tmp17;
+ fftw_real tmp21;
+ fftw_real tmp14;
+ fftw_real tmp18;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp17 = tmp15 + tmp16;
+ tmp21 = tmp19 - tmp20;
+ tmp14 = c_re(W[0]);
+ tmp18 = c_im(W[0]);
+ Y[-iostride] = (tmp14 * tmp17) - (tmp18 * tmp21);
+ X[iostride] = (tmp18 * tmp17) + (tmp14 * tmp21);
+ }
+ }
+ if (i == m) {
+ fftw_real tmp5;
+ fftw_real tmp1;
+ fftw_real tmp2;
+ fftw_real tmp3;
+ fftw_real tmp4;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp4 = Y[0];
+ tmp5 = K1_732050807 * tmp4;
+ tmp1 = X[iostride];
+ tmp2 = X[0];
+ tmp3 = tmp2 - tmp1;
+ X[0] = tmp1 + (K2_000000000 * tmp2);
+ X[2 * iostride] = -(tmp3 + tmp5);
+ X[iostride] = tmp3 - tmp5;
+ }
+}
+
+static const int twiddle_order[] =
+{1, 2};
+fftw_codelet_desc fftw_hc2hc_backward_3_desc =
+{
+ "fftw_hc2hc_backward_3",
+ (void (*)()) fftw_hc2hc_backward_3,
+ 3,
+ FFTW_BACKWARD,
+ FFTW_HC2HC,
+ 80,
+ 2,
+ twiddle_order,
+};
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