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fhb_8.c

/*
 * 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 20:45:12 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 8 */

/*
 * This function contains 108 FP additions, 50 FP multiplications,
 * (or, 90 additions, 32 multiplications, 18 fused multiply/add),
 * 31 stack variables, and 64 memory accesses
 */
static const fftw_real K765366864 = FFTW_KONST(+0.765366864730179543456919968060797733522689125);
static const fftw_real K1_847759065 = FFTW_KONST(+1.847759065022573512256366378793576573644833252);
static const fftw_real K707106781 = FFTW_KONST(+0.707106781186547524400844362104849039284835938);
static const fftw_real K1_414213562 = FFTW_KONST(+1.414213562373095048801688724209698078569671875);
static const fftw_real K2_000000000 = FFTW_KONST(+2.000000000000000000000000000000000000000000000);

/*
 * Generator Id's : 
 * $Id: exprdag.ml,v 1.41 1999/05/26 15:44:14 fftw Exp $
 * $Id: fft.ml,v 1.43 1999/05/17 19:44:18 fftw Exp $
 * $Id: to_c.ml,v 1.25 1999/10/26 21:41:32 stevenj Exp $
 */

void fftw_hc2hc_backward_8(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 + (8 * iostride);
     {
        fftw_real tmp107;
        fftw_real tmp118;
        fftw_real tmp105;
        fftw_real tmp116;
        fftw_real tmp111;
        fftw_real tmp120;
        fftw_real tmp115;
        fftw_real tmp121;
        fftw_real tmp108;
        fftw_real tmp112;
        ASSERT_ALIGNED_DOUBLE;
        {
             fftw_real tmp106;
             fftw_real tmp117;
             fftw_real tmp103;
             fftw_real tmp104;
             ASSERT_ALIGNED_DOUBLE;
             tmp106 = X[2 * iostride];
             tmp107 = K2_000000000 * tmp106;
             tmp117 = Y[-2 * iostride];
             tmp118 = K2_000000000 * tmp117;
             tmp103 = X[0];
             tmp104 = X[4 * iostride];
             tmp105 = tmp103 + tmp104;
             tmp116 = tmp103 - tmp104;
             {
                fftw_real tmp109;
                fftw_real tmp110;
                fftw_real tmp113;
                fftw_real tmp114;
                ASSERT_ALIGNED_DOUBLE;
                tmp109 = X[iostride];
                tmp110 = X[3 * iostride];
                tmp111 = K2_000000000 * (tmp109 + tmp110);
                tmp120 = tmp109 - tmp110;
                tmp113 = Y[-iostride];
                tmp114 = Y[-3 * iostride];
                tmp115 = K2_000000000 * (tmp113 - tmp114);
                tmp121 = tmp114 + tmp113;
             }
        }
        tmp108 = tmp105 + tmp107;
        X[4 * iostride] = tmp108 - tmp111;
        X[0] = tmp108 + tmp111;
        tmp112 = tmp105 - tmp107;
        X[6 * iostride] = tmp112 + tmp115;
        X[2 * iostride] = tmp112 - tmp115;
        {
             fftw_real tmp119;
             fftw_real tmp122;
             fftw_real tmp123;
             fftw_real tmp124;
             ASSERT_ALIGNED_DOUBLE;
             tmp119 = tmp116 - tmp118;
             tmp122 = K1_414213562 * (tmp120 - tmp121);
             X[5 * iostride] = tmp119 - tmp122;
             X[iostride] = tmp119 + tmp122;
             tmp123 = tmp116 + tmp118;
             tmp124 = K1_414213562 * (tmp120 + tmp121);
             X[3 * iostride] = tmp123 - tmp124;
             X[7 * iostride] = tmp123 + tmp124;
        }
     }
     X = X + dist;
     Y = Y - dist;
     for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 7) {
        fftw_real tmp29;
        fftw_real tmp60;
        fftw_real tmp46;
        fftw_real tmp56;
        fftw_real tmp70;
        fftw_real tmp96;
        fftw_real tmp82;
        fftw_real tmp92;
        fftw_real tmp36;
        fftw_real tmp57;
        fftw_real tmp53;
        fftw_real tmp61;
        fftw_real tmp73;
        fftw_real tmp83;
        fftw_real tmp76;
        fftw_real tmp84;
        ASSERT_ALIGNED_DOUBLE;
        {
             fftw_real tmp25;
             fftw_real tmp68;
             fftw_real tmp42;
             fftw_real tmp81;
             fftw_real tmp28;
             fftw_real tmp80;
             fftw_real tmp45;
             fftw_real tmp69;
             ASSERT_ALIGNED_DOUBLE;
             {
                fftw_real tmp23;
                fftw_real tmp24;
                fftw_real tmp40;
                fftw_real tmp41;
                ASSERT_ALIGNED_DOUBLE;
                tmp23 = X[0];
                tmp24 = Y[-4 * iostride];
                tmp25 = tmp23 + tmp24;
                tmp68 = tmp23 - tmp24;
                tmp40 = Y[0];
                tmp41 = X[4 * iostride];
                tmp42 = tmp40 - tmp41;
                tmp81 = tmp40 + tmp41;
             }
             {
                fftw_real tmp26;
                fftw_real tmp27;
                fftw_real tmp43;
                fftw_real tmp44;
                ASSERT_ALIGNED_DOUBLE;
                tmp26 = X[2 * iostride];
                tmp27 = Y[-6 * iostride];
                tmp28 = tmp26 + tmp27;
                tmp80 = tmp26 - tmp27;
                tmp43 = Y[-2 * iostride];
                tmp44 = X[6 * iostride];
                tmp45 = tmp43 - tmp44;
                tmp69 = tmp43 + tmp44;
             }
             tmp29 = tmp25 + tmp28;
             tmp60 = tmp25 - tmp28;
             tmp46 = tmp42 + tmp45;
             tmp56 = tmp42 - tmp45;
             tmp70 = tmp68 - tmp69;
             tmp96 = tmp68 + tmp69;
             tmp82 = tmp80 + tmp81;
             tmp92 = tmp81 - tmp80;
        }
        {
             fftw_real tmp32;
             fftw_real tmp71;
             fftw_real tmp49;
             fftw_real tmp72;
             fftw_real tmp35;
             fftw_real tmp74;
             fftw_real tmp52;
             fftw_real tmp75;
             ASSERT_ALIGNED_DOUBLE;
             {
                fftw_real tmp30;
                fftw_real tmp31;
                fftw_real tmp47;
                fftw_real tmp48;
                ASSERT_ALIGNED_DOUBLE;
                tmp30 = X[iostride];
                tmp31 = Y[-5 * iostride];
                tmp32 = tmp30 + tmp31;
                tmp71 = tmp30 - tmp31;
                tmp47 = Y[-iostride];
                tmp48 = X[5 * iostride];
                tmp49 = tmp47 - tmp48;
                tmp72 = tmp47 + tmp48;
             }
             {
                fftw_real tmp33;
                fftw_real tmp34;
                fftw_real tmp50;
                fftw_real tmp51;
                ASSERT_ALIGNED_DOUBLE;
                tmp33 = Y[-7 * iostride];
                tmp34 = X[3 * iostride];
                tmp35 = tmp33 + tmp34;
                tmp74 = tmp33 - tmp34;
                tmp50 = Y[-3 * iostride];
                tmp51 = X[7 * iostride];
                tmp52 = tmp50 - tmp51;
                tmp75 = tmp50 + tmp51;
             }
             tmp36 = tmp32 + tmp35;
             tmp57 = tmp32 - tmp35;
             tmp53 = tmp49 + tmp52;
             tmp61 = tmp52 - tmp49;
             tmp73 = tmp71 - tmp72;
             tmp83 = tmp71 + tmp72;
             tmp76 = tmp74 - tmp75;
             tmp84 = tmp74 + tmp75;
        }
        X[0] = tmp29 + tmp36;
        Y[-7 * iostride] = tmp46 + tmp53;
        {
             fftw_real tmp38;
             fftw_real tmp54;
             fftw_real tmp37;
             fftw_real tmp39;
             ASSERT_ALIGNED_DOUBLE;
             tmp38 = tmp29 - tmp36;
             tmp54 = tmp46 - tmp53;
             tmp37 = c_re(W[3]);
             tmp39 = c_im(W[3]);
             X[4 * iostride] = (tmp37 * tmp38) + (tmp39 * tmp54);
             Y[-3 * iostride] = (tmp37 * tmp54) - (tmp39 * tmp38);
        }
        {
             fftw_real tmp64;
             fftw_real tmp66;
             fftw_real tmp63;
             fftw_real tmp65;
             ASSERT_ALIGNED_DOUBLE;
             tmp64 = tmp57 + tmp56;
             tmp66 = tmp60 + tmp61;
             tmp63 = c_re(W[1]);
             tmp65 = c_im(W[1]);
             Y[-5 * iostride] = (tmp63 * tmp64) - (tmp65 * tmp66);
             X[2 * iostride] = (tmp65 * tmp64) + (tmp63 * tmp66);
        }
        {
             fftw_real tmp58;
             fftw_real tmp62;
             fftw_real tmp55;
             fftw_real tmp59;
             ASSERT_ALIGNED_DOUBLE;
             tmp58 = tmp56 - tmp57;
             tmp62 = tmp60 - tmp61;
             tmp55 = c_re(W[5]);
             tmp59 = c_im(W[5]);
             Y[-iostride] = (tmp55 * tmp58) - (tmp59 * tmp62);
             X[6 * iostride] = (tmp59 * tmp58) + (tmp55 * tmp62);
        }
        {
             fftw_real tmp94;
             fftw_real tmp100;
             fftw_real tmp98;
             fftw_real tmp102;
             fftw_real tmp93;
             fftw_real tmp97;
             ASSERT_ALIGNED_DOUBLE;
             tmp93 = K707106781 * (tmp73 - tmp76);
             tmp94 = tmp92 + tmp93;
             tmp100 = tmp92 - tmp93;
             tmp97 = K707106781 * (tmp83 + tmp84);
             tmp98 = tmp96 - tmp97;
             tmp102 = tmp96 + tmp97;
             {
                fftw_real tmp91;
                fftw_real tmp95;
                fftw_real tmp99;
                fftw_real tmp101;
                ASSERT_ALIGNED_DOUBLE;
                tmp91 = c_re(W[2]);
                tmp95 = c_im(W[2]);
                Y[-4 * iostride] = (tmp91 * tmp94) - (tmp95 * tmp98);
                X[3 * iostride] = (tmp95 * tmp94) + (tmp91 * tmp98);
                tmp99 = c_re(W[6]);
                tmp101 = c_im(W[6]);
                Y[0] = (tmp99 * tmp100) - (tmp101 * tmp102);
                X[7 * iostride] = (tmp101 * tmp100) + (tmp99 * tmp102);
             }
        }
        {
             fftw_real tmp78;
             fftw_real tmp88;
             fftw_real tmp86;
             fftw_real tmp90;
             fftw_real tmp77;
             fftw_real tmp85;
             ASSERT_ALIGNED_DOUBLE;
             tmp77 = K707106781 * (tmp73 + tmp76);
             tmp78 = tmp70 - tmp77;
             tmp88 = tmp70 + tmp77;
             tmp85 = K707106781 * (tmp83 - tmp84);
             tmp86 = tmp82 - tmp85;
             tmp90 = tmp82 + tmp85;
             {
                fftw_real tmp67;
                fftw_real tmp79;
                fftw_real tmp87;
                fftw_real tmp89;
                ASSERT_ALIGNED_DOUBLE;
                tmp67 = c_re(W[4]);
                tmp79 = c_im(W[4]);
                X[5 * iostride] = (tmp67 * tmp78) + (tmp79 * tmp86);
                Y[-2 * iostride] = (tmp67 * tmp86) - (tmp79 * tmp78);
                tmp87 = c_re(W[0]);
                tmp89 = c_im(W[0]);
                X[iostride] = (tmp87 * tmp88) + (tmp89 * tmp90);
                Y[-6 * iostride] = (tmp87 * tmp90) - (tmp89 * tmp88);
             }
        }
     }
     if (i == m) {
        fftw_real tmp3;
        fftw_real tmp7;
        fftw_real tmp15;
        fftw_real tmp20;
        fftw_real tmp6;
        fftw_real tmp12;
        fftw_real tmp10;
        fftw_real tmp21;
        fftw_real tmp19;
        fftw_real tmp22;
        ASSERT_ALIGNED_DOUBLE;
        {
             fftw_real tmp1;
             fftw_real tmp2;
             fftw_real tmp13;
             fftw_real tmp14;
             ASSERT_ALIGNED_DOUBLE;
             tmp1 = X[0];
             tmp2 = X[3 * iostride];
             tmp3 = tmp1 + tmp2;
             tmp7 = tmp1 - tmp2;
             tmp13 = Y[0];
             tmp14 = Y[-3 * iostride];
             tmp15 = tmp13 + tmp14;
             tmp20 = tmp13 - tmp14;
        }
        {
             fftw_real tmp4;
             fftw_real tmp5;
             fftw_real tmp8;
             fftw_real tmp9;
             ASSERT_ALIGNED_DOUBLE;
             tmp4 = X[2 * iostride];
             tmp5 = X[iostride];
             tmp6 = tmp4 + tmp5;
             tmp12 = tmp4 - tmp5;
             tmp8 = Y[-2 * iostride];
             tmp9 = Y[-iostride];
             tmp10 = tmp8 + tmp9;
             tmp21 = tmp8 - tmp9;
        }
        X[0] = K2_000000000 * (tmp3 + tmp6);
        tmp19 = tmp3 - tmp6;
        tmp22 = tmp20 - tmp21;
        X[2 * iostride] = K1_414213562 * (tmp19 - tmp22);
        X[6 * iostride] = -(K1_414213562 * (tmp19 + tmp22));
        X[4 * iostride] = -(K2_000000000 * (tmp21 + tmp20));
        {
             fftw_real tmp11;
             fftw_real tmp16;
             fftw_real tmp17;
             fftw_real tmp18;
             ASSERT_ALIGNED_DOUBLE;
             tmp11 = tmp7 - tmp10;
             tmp16 = tmp12 + tmp15;
             X[iostride] = (K1_847759065 * tmp11) - (K765366864 * tmp16);
             X[5 * iostride] = -((K765366864 * tmp11) + (K1_847759065 * tmp16));
             tmp17 = tmp7 + tmp10;
             tmp18 = tmp15 - tmp12;
             X[3 * iostride] = (K765366864 * tmp17) - (K1_847759065 * tmp18);
             X[7 * iostride] = -((K1_847759065 * tmp17) + (K765366864 * tmp18));
        }
     }
}

static const int twiddle_order[] =
{1, 2, 3, 4, 5, 6, 7};
fftw_codelet_desc fftw_hc2hc_backward_8_desc =
{
     "fftw_hc2hc_backward_8",
     (void (*)()) fftw_hc2hc_backward_8,
     8,
     FFTW_BACKWARD,
     FFTW_HC2HC,
     190,
     7,
     twiddle_order,
};

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