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fhf_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 20:44:46 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-forward 8 */

/*
 * This function contains 108 FP additions, 44 FP multiplications,
 * (or, 90 additions, 26 multiplications, 18 fused multiply/add),
 * 29 stack variables, and 64 memory accesses
 */
static const fftw_real K382683432 = FFTW_KONST(+0.382683432365089771728459984030398866761344562);
static const fftw_real K923879532 = FFTW_KONST(+0.923879532511286756128183189396788286822416626);
static const fftw_real K707106781 = FFTW_KONST(+0.707106781186547524400844362104849039284835938);

/*
 * 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_forward_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 tmp105;
        fftw_real tmp109;
        fftw_real tmp115;
        fftw_real tmp121;
        fftw_real tmp108;
        fftw_real tmp118;
        fftw_real tmp112;
        fftw_real tmp120;
        ASSERT_ALIGNED_DOUBLE;
        {
             fftw_real tmp103;
             fftw_real tmp104;
             fftw_real tmp113;
             fftw_real tmp114;
             ASSERT_ALIGNED_DOUBLE;
             tmp103 = X[0];
             tmp104 = X[4 * iostride];
             tmp105 = tmp103 + tmp104;
             tmp109 = tmp103 - tmp104;
             tmp113 = X[7 * iostride];
             tmp114 = X[3 * iostride];
             tmp115 = tmp113 - tmp114;
             tmp121 = tmp113 + tmp114;
        }
        {
             fftw_real tmp106;
             fftw_real tmp107;
             fftw_real tmp110;
             fftw_real tmp111;
             ASSERT_ALIGNED_DOUBLE;
             tmp106 = X[2 * iostride];
             tmp107 = X[6 * iostride];
             tmp108 = tmp106 + tmp107;
             tmp118 = tmp106 - tmp107;
             tmp110 = X[iostride];
             tmp111 = X[5 * iostride];
             tmp112 = tmp110 - tmp111;
             tmp120 = tmp110 + tmp111;
        }
        {
             fftw_real tmp119;
             fftw_real tmp122;
             fftw_real tmp116;
             fftw_real tmp117;
             ASSERT_ALIGNED_DOUBLE;
             X[2 * iostride] = tmp105 - tmp108;
             tmp119 = tmp105 + tmp108;
             tmp122 = tmp120 + tmp121;
             X[4 * iostride] = tmp119 - tmp122;
             X[0] = tmp119 + tmp122;
             Y[-2 * iostride] = tmp121 - tmp120;
             tmp116 = K707106781 * (tmp112 + tmp115);
             X[3 * iostride] = tmp109 - tmp116;
             X[iostride] = tmp109 + tmp116;
             tmp117 = K707106781 * (tmp115 - tmp112);
             Y[-iostride] = tmp117 - tmp118;
             Y[-3 * iostride] = tmp118 + tmp117;
        }
     }
     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 tmp65;
        fftw_real tmp92;
        fftw_real tmp97;
        fftw_real tmp63;
        fftw_real tmp75;
        fftw_real tmp78;
        fftw_real tmp87;
        fftw_real tmp40;
        fftw_real tmp98;
        fftw_real tmp68;
        fftw_real tmp89;
        fftw_real tmp52;
        fftw_real tmp70;
        fftw_real tmp73;
        fftw_real tmp86;
        ASSERT_ALIGNED_DOUBLE;
        {
             fftw_real tmp23;
             fftw_real tmp91;
             fftw_real tmp28;
             fftw_real tmp90;
             ASSERT_ALIGNED_DOUBLE;
             tmp23 = X[0];
             tmp91 = Y[-7 * iostride];
             {
                fftw_real tmp25;
                fftw_real tmp27;
                fftw_real tmp24;
                fftw_real tmp26;
                ASSERT_ALIGNED_DOUBLE;
                tmp25 = X[4 * iostride];
                tmp27 = Y[-3 * iostride];
                tmp24 = c_re(W[3]);
                tmp26 = c_im(W[3]);
                tmp28 = (tmp24 * tmp25) - (tmp26 * tmp27);
                tmp90 = (tmp26 * tmp25) + (tmp24 * tmp27);
             }
             tmp29 = tmp23 + tmp28;
             tmp65 = tmp23 - tmp28;
             tmp92 = tmp90 + tmp91;
             tmp97 = tmp91 - tmp90;
        }
        {
             fftw_real tmp57;
             fftw_real tmp76;
             fftw_real tmp62;
             fftw_real tmp77;
             ASSERT_ALIGNED_DOUBLE;
             {
                fftw_real tmp54;
                fftw_real tmp56;
                fftw_real tmp53;
                fftw_real tmp55;
                ASSERT_ALIGNED_DOUBLE;
                tmp54 = X[7 * iostride];
                tmp56 = Y[0];
                tmp53 = c_re(W[6]);
                tmp55 = c_im(W[6]);
                tmp57 = (tmp53 * tmp54) - (tmp55 * tmp56);
                tmp76 = (tmp55 * tmp54) + (tmp53 * tmp56);
             }
             {
                fftw_real tmp59;
                fftw_real tmp61;
                fftw_real tmp58;
                fftw_real tmp60;
                ASSERT_ALIGNED_DOUBLE;
                tmp59 = X[3 * iostride];
                tmp61 = Y[-4 * iostride];
                tmp58 = c_re(W[2]);
                tmp60 = c_im(W[2]);
                tmp62 = (tmp58 * tmp59) - (tmp60 * tmp61);
                tmp77 = (tmp60 * tmp59) + (tmp58 * tmp61);
             }
             tmp63 = tmp57 + tmp62;
             tmp75 = tmp57 - tmp62;
             tmp78 = tmp76 - tmp77;
             tmp87 = tmp76 + tmp77;
        }
        {
             fftw_real tmp34;
             fftw_real tmp66;
             fftw_real tmp39;
             fftw_real tmp67;
             ASSERT_ALIGNED_DOUBLE;
             {
                fftw_real tmp31;
                fftw_real tmp33;
                fftw_real tmp30;
                fftw_real tmp32;
                ASSERT_ALIGNED_DOUBLE;
                tmp31 = X[2 * iostride];
                tmp33 = Y[-5 * iostride];
                tmp30 = c_re(W[1]);
                tmp32 = c_im(W[1]);
                tmp34 = (tmp30 * tmp31) - (tmp32 * tmp33);
                tmp66 = (tmp32 * tmp31) + (tmp30 * tmp33);
             }
             {
                fftw_real tmp36;
                fftw_real tmp38;
                fftw_real tmp35;
                fftw_real tmp37;
                ASSERT_ALIGNED_DOUBLE;
                tmp36 = X[6 * iostride];
                tmp38 = Y[-iostride];
                tmp35 = c_re(W[5]);
                tmp37 = c_im(W[5]);
                tmp39 = (tmp35 * tmp36) - (tmp37 * tmp38);
                tmp67 = (tmp37 * tmp36) + (tmp35 * tmp38);
             }
             tmp40 = tmp34 + tmp39;
             tmp98 = tmp34 - tmp39;
             tmp68 = tmp66 - tmp67;
             tmp89 = tmp66 + tmp67;
        }
        {
             fftw_real tmp46;
             fftw_real tmp71;
             fftw_real tmp51;
             fftw_real tmp72;
             ASSERT_ALIGNED_DOUBLE;
             {
                fftw_real tmp43;
                fftw_real tmp45;
                fftw_real tmp42;
                fftw_real tmp44;
                ASSERT_ALIGNED_DOUBLE;
                tmp43 = X[iostride];
                tmp45 = Y[-6 * iostride];
                tmp42 = c_re(W[0]);
                tmp44 = c_im(W[0]);
                tmp46 = (tmp42 * tmp43) - (tmp44 * tmp45);
                tmp71 = (tmp44 * tmp43) + (tmp42 * tmp45);
             }
             {
                fftw_real tmp48;
                fftw_real tmp50;
                fftw_real tmp47;
                fftw_real tmp49;
                ASSERT_ALIGNED_DOUBLE;
                tmp48 = X[5 * iostride];
                tmp50 = Y[-2 * iostride];
                tmp47 = c_re(W[4]);
                tmp49 = c_im(W[4]);
                tmp51 = (tmp47 * tmp48) - (tmp49 * tmp50);
                tmp72 = (tmp49 * tmp48) + (tmp47 * tmp50);
             }
             tmp52 = tmp46 + tmp51;
             tmp70 = tmp46 - tmp51;
             tmp73 = tmp71 - tmp72;
             tmp86 = tmp71 + tmp72;
        }
        {
             fftw_real tmp41;
             fftw_real tmp64;
             fftw_real tmp85;
             fftw_real tmp88;
             ASSERT_ALIGNED_DOUBLE;
             tmp41 = tmp29 + tmp40;
             tmp64 = tmp52 + tmp63;
             Y[-4 * iostride] = tmp41 - tmp64;
             X[0] = tmp41 + tmp64;
             {
                fftw_real tmp95;
                fftw_real tmp96;
                fftw_real tmp93;
                fftw_real tmp94;
                ASSERT_ALIGNED_DOUBLE;
                tmp95 = tmp92 - tmp89;
                tmp96 = tmp63 - tmp52;
                X[6 * iostride] = -(tmp95 - tmp96);
                Y[-2 * iostride] = tmp96 + tmp95;
                tmp93 = tmp89 + tmp92;
                tmp94 = tmp86 + tmp87;
                X[4 * iostride] = -(tmp93 - tmp94);
                Y[0] = tmp94 + tmp93;
             }
             tmp85 = tmp29 - tmp40;
             tmp88 = tmp86 - tmp87;
             Y[-6 * iostride] = tmp85 - tmp88;
             X[2 * iostride] = tmp85 + tmp88;
             {
                fftw_real tmp81;
                fftw_real tmp99;
                fftw_real tmp84;
                fftw_real tmp100;
                fftw_real tmp82;
                fftw_real tmp83;
                ASSERT_ALIGNED_DOUBLE;
                tmp81 = tmp65 - tmp68;
                tmp99 = tmp97 - tmp98;
                tmp82 = tmp73 - tmp70;
                tmp83 = tmp75 + tmp78;
                tmp84 = K707106781 * (tmp82 - tmp83);
                tmp100 = K707106781 * (tmp82 + tmp83);
                Y[-7 * iostride] = tmp81 - tmp84;
                X[3 * iostride] = tmp81 + tmp84;
                X[5 * iostride] = -(tmp99 - tmp100);
                Y[-iostride] = tmp100 + tmp99;
             }
             {
                fftw_real tmp69;
                fftw_real tmp101;
                fftw_real tmp80;
                fftw_real tmp102;
                fftw_real tmp74;
                fftw_real tmp79;
                ASSERT_ALIGNED_DOUBLE;
                tmp69 = tmp65 + tmp68;
                tmp101 = tmp98 + tmp97;
                tmp74 = tmp70 + tmp73;
                tmp79 = tmp75 - tmp78;
                tmp80 = K707106781 * (tmp74 + tmp79);
                tmp102 = K707106781 * (tmp79 - tmp74);
                Y[-5 * iostride] = tmp69 - tmp80;
                X[iostride] = tmp69 + tmp80;
                X[7 * iostride] = -(tmp101 - tmp102);
                Y[-3 * iostride] = tmp102 + tmp101;
             }
        }
     }
     if (i == m) {
        fftw_real tmp1;
        fftw_real tmp19;
        fftw_real tmp4;
        fftw_real tmp18;
        fftw_real tmp8;
        fftw_real tmp14;
        fftw_real tmp11;
        fftw_real tmp15;
        fftw_real tmp2;
        fftw_real tmp3;
        ASSERT_ALIGNED_DOUBLE;
        tmp1 = X[0];
        tmp19 = X[4 * iostride];
        tmp2 = X[2 * iostride];
        tmp3 = X[6 * iostride];
        tmp4 = K707106781 * (tmp2 - tmp3);
        tmp18 = K707106781 * (tmp2 + tmp3);
        {
             fftw_real tmp6;
             fftw_real tmp7;
             fftw_real tmp9;
             fftw_real tmp10;
             ASSERT_ALIGNED_DOUBLE;
             tmp6 = X[iostride];
             tmp7 = X[5 * iostride];
             tmp8 = (K923879532 * tmp6) - (K382683432 * tmp7);
             tmp14 = (K382683432 * tmp6) + (K923879532 * tmp7);
             tmp9 = X[3 * iostride];
             tmp10 = X[7 * iostride];
             tmp11 = (K382683432 * tmp9) - (K923879532 * tmp10);
             tmp15 = (K923879532 * tmp9) + (K382683432 * tmp10);
        }
        {
             fftw_real tmp5;
             fftw_real tmp12;
             fftw_real tmp21;
             fftw_real tmp22;
             ASSERT_ALIGNED_DOUBLE;
             tmp5 = tmp1 + tmp4;
             tmp12 = tmp8 + tmp11;
             X[3 * iostride] = tmp5 - tmp12;
             X[0] = tmp5 + tmp12;
             tmp21 = tmp11 - tmp8;
             tmp22 = tmp19 - tmp18;
             Y[-2 * iostride] = tmp21 - tmp22;
             Y[-iostride] = tmp21 + tmp22;
        }
        {
             fftw_real tmp17;
             fftw_real tmp20;
             fftw_real tmp13;
             fftw_real tmp16;
             ASSERT_ALIGNED_DOUBLE;
             tmp17 = tmp14 + tmp15;
             tmp20 = tmp18 + tmp19;
             Y[0] = -(tmp17 + tmp20);
             Y[-3 * iostride] = tmp20 - tmp17;
             tmp13 = tmp1 - tmp4;
             tmp16 = tmp14 - tmp15;
             X[2 * iostride] = tmp13 - tmp16;
             X[iostride] = tmp13 + tmp16;
        }
     }
}

static const int twiddle_order[] =
{1, 2, 3, 4, 5, 6, 7};
fftw_codelet_desc fftw_hc2hc_forward_8_desc =
{
     "fftw_hc2hc_forward_8",
     (void (*)()) fftw_hc2hc_forward_8,
     8,
     FFTW_FORWARD,
     FFTW_HC2HC,
     179,
     7,
     twiddle_order,
};

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