diff options
Diffstat (limited to 'src/sndobj/rfftw/fhb_4.c')
| -rw-r--r-- | src/sndobj/rfftw/fhb_4.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/src/sndobj/rfftw/fhb_4.c b/src/sndobj/rfftw/fhb_4.c new file mode 100644 index 0000000..5400df3 --- /dev/null +++ b/src/sndobj/rfftw/fhb_4.c @@ -0,0 +1,193 @@ +/*
+ * 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 20:45:10 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 4 */
+
+/*
+ * This function contains 34 FP additions, 18 FP multiplications,
+ * (or, 28 additions, 12 multiplications, 6 fused multiply/add),
+ * 15 stack variables, and 32 memory accesses
+ */
+static const fftw_real K1_414213562 = FFTW_KONST(+1.414213562373095048801688724209698078569671875);
+static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000);
+
+/*
+ * Generator Id's :
+ * $Id: fhb_4.c,v 1.1.1.1 2006/05/12 15:14:46 veplaini Exp $
+ * $Id: fhb_4.c,v 1.1.1.1 2006/05/12 15:14:46 veplaini Exp $
+ * $Id: fhb_4.c,v 1.1.1.1 2006/05/12 15:14:46 veplaini Exp $
+ */
+
+void fftw_hc2hc_backward_4(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 + (4 * iostride);
+ {
+ fftw_real tmp39;
+ fftw_real tmp42;
+ fftw_real tmp37;
+ fftw_real tmp40;
+ ASSERT_ALIGNED_DOUBLE;
+ {
+ fftw_real tmp38;
+ fftw_real tmp41;
+ fftw_real tmp35;
+ fftw_real tmp36;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp38 = X[iostride];
+ tmp39 = K2_000000000 * tmp38;
+ tmp41 = Y[-iostride];
+ tmp42 = K2_000000000 * tmp41;
+ tmp35 = X[0];
+ tmp36 = X[2 * iostride];
+ tmp37 = tmp35 + tmp36;
+ tmp40 = tmp35 - tmp36;
+ }
+ X[2 * iostride] = tmp37 - tmp39;
+ X[0] = tmp37 + tmp39;
+ X[3 * iostride] = tmp40 + tmp42;
+ X[iostride] = tmp40 - tmp42;
+ }
+ X = X + dist;
+ Y = Y - dist;
+ for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 3) {
+ fftw_real tmp9;
+ fftw_real tmp28;
+ fftw_real tmp18;
+ fftw_real tmp25;
+ fftw_real tmp12;
+ fftw_real tmp24;
+ fftw_real tmp21;
+ fftw_real tmp29;
+ ASSERT_ALIGNED_DOUBLE;
+ {
+ fftw_real tmp7;
+ fftw_real tmp8;
+ fftw_real tmp16;
+ fftw_real tmp17;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp7 = X[0];
+ tmp8 = Y[-2 * iostride];
+ tmp9 = tmp7 + tmp8;
+ tmp28 = tmp7 - tmp8;
+ tmp16 = Y[0];
+ tmp17 = X[2 * iostride];
+ tmp18 = tmp16 - tmp17;
+ tmp25 = tmp16 + tmp17;
+ }
+ {
+ fftw_real tmp10;
+ fftw_real tmp11;
+ fftw_real tmp19;
+ fftw_real tmp20;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp10 = X[iostride];
+ tmp11 = Y[-3 * iostride];
+ tmp12 = tmp10 + tmp11;
+ tmp24 = tmp10 - tmp11;
+ tmp19 = Y[-iostride];
+ tmp20 = X[3 * iostride];
+ tmp21 = tmp19 - tmp20;
+ tmp29 = tmp19 + tmp20;
+ }
+ X[0] = tmp9 + tmp12;
+ {
+ fftw_real tmp14;
+ fftw_real tmp22;
+ fftw_real tmp13;
+ fftw_real tmp15;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp14 = tmp9 - tmp12;
+ tmp22 = tmp18 - tmp21;
+ tmp13 = c_re(W[1]);
+ tmp15 = c_im(W[1]);
+ X[2 * iostride] = (tmp13 * tmp14) + (tmp15 * tmp22);
+ Y[-iostride] = (tmp13 * tmp22) - (tmp15 * tmp14);
+ }
+ Y[-3 * iostride] = tmp18 + tmp21;
+ {
+ fftw_real tmp26;
+ fftw_real tmp30;
+ fftw_real tmp23;
+ fftw_real tmp27;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp26 = tmp24 + tmp25;
+ tmp30 = tmp28 - tmp29;
+ tmp23 = c_re(W[0]);
+ tmp27 = c_im(W[0]);
+ Y[-2 * iostride] = (tmp23 * tmp26) - (tmp27 * tmp30);
+ X[iostride] = (tmp27 * tmp26) + (tmp23 * tmp30);
+ }
+ {
+ fftw_real tmp32;
+ fftw_real tmp34;
+ fftw_real tmp31;
+ fftw_real tmp33;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp32 = tmp25 - tmp24;
+ tmp34 = tmp28 + tmp29;
+ tmp31 = c_re(W[2]);
+ tmp33 = c_im(W[2]);
+ Y[0] = (tmp31 * tmp32) - (tmp33 * tmp34);
+ X[3 * iostride] = (tmp33 * tmp32) + (tmp31 * tmp34);
+ }
+ }
+ if (i == m) {
+ fftw_real tmp1;
+ fftw_real tmp2;
+ fftw_real tmp3;
+ fftw_real tmp4;
+ fftw_real tmp5;
+ fftw_real tmp6;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp1 = X[0];
+ tmp2 = X[iostride];
+ tmp3 = tmp1 - tmp2;
+ tmp4 = Y[0];
+ tmp5 = Y[-iostride];
+ tmp6 = tmp4 + tmp5;
+ X[0] = K2_000000000 * (tmp1 + tmp2);
+ X[2 * iostride] = -(K2_000000000 * (tmp4 - tmp5));
+ X[iostride] = K1_414213562 * (tmp3 - tmp6);
+ X[3 * iostride] = -(K1_414213562 * (tmp3 + tmp6));
+ }
+}
+
+static const int twiddle_order[] =
+{1, 2, 3};
+fftw_codelet_desc fftw_hc2hc_backward_4_desc =
+{
+ "fftw_hc2hc_backward_4",
+ (void (*)()) fftw_hc2hc_backward_4,
+ 4,
+ FFTW_BACKWARD,
+ FFTW_HC2HC,
+ 102,
+ 3,
+ twiddle_order,
+};
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