t3bv_8.c

快速傅立叶变换库函数

/*
 * Copyright (c) 2003, 2006 Matteo Frigo
 * Copyright (c) 2003, 2006 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 Sat Oct  4 10:27:51 EDT 2008 */

#include "codelet-dft.h"

#ifdef HAVE_FMA

/* Generated by: ../../../genfft/gen_twiddle_c -fma -reorder-insns -schedule-for-pipeline -simd -compact -variables 4 -pipeline-latency 8 -twiddle-log3 -precompute-twiddles -no-generate-bytw -n 8 -name t3bv_8 -include t3b.h -sign 1 */

/*
 * This function contains 37 FP additions, 32 FP multiplications,
 * (or, 27 additions, 22 multiplications, 10 fused multiply/add),
 * 43 stack variables, and 16 memory accesses
 */
/*
 * Generator Id's : 
 * $Id: algsimp.ml,v 1.9 2006-02-12 23:34:12 athena Exp $
 * $Id: fft.ml,v 1.4 2006-01-05 03:04:27 stevenj Exp $
 * $Id: gen_twiddle_c.ml,v 1.14 2006-02-12 23:34:12 athena Exp $
 */

#include "t3b.h"

static const R *t3bv_8(R *ri, R *ii, const R *W, stride ios, INT m, INT dist)
{
     DVK(KP707106781, +0.707106781186547524400844362104849039284835938);
     INT i;
     R *x;
     x = ii;
     for (i = m; i > 0; i = i - VL, x = x + (VL * dist), W = W + (TWVL * 6), MAKE_VOLATILE_STRIDE(ios)) {
	  V T2, T3, Tb, T1, T5, Tn, Tq, T8, Td, T4, Ta, Tp, Tg, Ti, T9;
	  T2 = LDW(&(W[0]));
	  T3 = LDW(&(W[TWVL * 2]));
	  Tb = LDW(&(W[TWVL * 4]));
	  T1 = LD(&(x[0]), dist, &(x[0]));
	  T5 = LD(&(x[WS(ios, 4)]), dist, &(x[0]));
	  Tn = LD(&(x[WS(ios, 2)]), dist, &(x[0]));
	  Tq = LD(&(x[WS(ios, 6)]), dist, &(x[0]));
	  T8 = LD(&(x[WS(ios, 1)]), dist, &(x[WS(ios, 1)]));
	  Td = LD(&(x[WS(ios, 5)]), dist, &(x[WS(ios, 1)]));
	  T4 = VZMUL(T2, T3);
	  Ta = VZMULJ(T2, T3);
	  Tp = VZMULJ(T2, Tb);
	  Tg = LD(&(x[WS(ios, 7)]), dist, &(x[WS(ios, 1)]));
	  Ti = LD(&(x[WS(ios, 3)]), dist, &(x[WS(ios, 1)]));
	  T9 = VZMUL(T2, T8);
	  {
	       V T6, To, Tc, Tr, Th, Tj;
	       T6 = VZMUL(T4, T5);
	       To = VZMUL(Ta, Tn);
	       Tc = VZMULJ(Ta, Tb);
	       Tr = VZMUL(Tp, Tq);
	       Th = VZMUL(Tb, Tg);
	       Tj = VZMUL(T3, Ti);
	       {
		    V Tx, T7, Te, Ts, Ty, Tk, TB;
		    Tx = VADD(T1, T6);
		    T7 = VSUB(T1, T6);
		    Te = VZMUL(Tc, Td);
		    Ts = VSUB(To, Tr);
		    Ty = VADD(To, Tr);
		    Tk = VSUB(Th, Tj);
		    TB = VADD(Th, Tj);
		    {
			 V Tf, TA, Tz, TD;
			 Tf = VSUB(T9, Te);
			 TA = VADD(T9, Te);
			 Tz = VSUB(Tx, Ty);
			 TD = VADD(Tx, Ty);
			 {
			      V TC, TE, Tl, Tt;
			      TC = VSUB(TA, TB);
			      TE = VADD(TA, TB);
			      Tl = VADD(Tf, Tk);
			      Tt = VSUB(Tf, Tk);
			      {
				   V Tu, Tw, Tm, Tv;
				   ST(&(x[0]), VADD(TD, TE), dist, &(x[0]));
				   ST(&(x[WS(ios, 4)]), VSUB(TD, TE), dist, &(x[0]));
				   ST(&(x[WS(ios, 2)]), VFMAI(TC, Tz), dist, &(x[0]));
				   ST(&(x[WS(ios, 6)]), VFNMSI(TC, Tz), dist, &(x[0]));
				   Tu = VFNMS(LDK(KP707106781), Tt, Ts);
				   Tw = VFMA(LDK(KP707106781), Tt, Ts);
				   Tm = VFNMS(LDK(KP707106781), Tl, T7);
				   Tv = VFMA(LDK(KP707106781), Tl, T7);
				   ST(&(x[WS(ios, 1)]), VFMAI(Tw, Tv), dist, &(x[WS(ios, 1)]));
				   ST(&(x[WS(ios, 7)]), VFNMSI(Tw, Tv), dist, &(x[WS(ios, 1)]));
				   ST(&(x[WS(ios, 5)]), VFMAI(Tu, Tm), dist, &(x[WS(ios, 1)]));
				   ST(&(x[WS(ios, 3)]), VFNMSI(Tu, Tm), dist, &(x[WS(ios, 1)]));
			      }
			 }
		    }
	       }
	  }
     }
     return W;
}

static const tw_instr twinstr[] = {
     VTW(1),
     VTW(3),
     VTW(7),
     {TW_NEXT, VL, 0}
};

static const ct_desc desc = { 8, "t3bv_8", twinstr, &GENUS, {27, 22, 10, 0}, 0, 0, 0 };

void X(codelet_t3bv_8) (planner *p) {
     X(kdft_dit_register) (p, t3bv_8, &desc);
}
#else				/* HAVE_FMA */

/* Generated by: ../../../genfft/gen_twiddle_c -simd -compact -variables 4 -pipeline-latency 8 -twiddle-log3 -precompute-twiddles -no-generate-bytw -n 8 -name t3bv_8 -include t3b.h -sign 1 */

/*
 * This function contains 37 FP additions, 24 FP multiplications,
 * (or, 37 additions, 24 multiplications, 0 fused multiply/add),
 * 31 stack variables, and 16 memory accesses
 */
/*
 * Generator Id's : 
 * $Id: algsimp.ml,v 1.9 2006-02-12 23:34:12 athena Exp $
 * $Id: fft.ml,v 1.4 2006-01-05 03:04:27 stevenj Exp $
 * $Id: gen_twiddle_c.ml,v 1.14 2006-02-12 23:34:12 athena Exp $
 */

#include "t3b.h"

static const R *t3bv_8(R *ri, R *ii, const R *W, stride ios, INT m, INT dist)
{
     DVK(KP707106781, +0.707106781186547524400844362104849039284835938);
     INT i;
     R *x;
     x = ii;
     for (i = m; i > 0; i = i - VL, x = x + (VL * dist), W = W + (TWVL * 6), MAKE_VOLATILE_STRIDE(ios)) {
	  V T1, T4, T5, Tp, T6, T7, Tj;
	  T1 = LDW(&(W[0]));
	  T4 = LDW(&(W[TWVL * 2]));
	  T5 = VZMULJ(T1, T4);
	  Tp = VZMUL(T1, T4);
	  T6 = LDW(&(W[TWVL * 4]));
	  T7 = VZMULJ(T5, T6);
	  Tj = VZMULJ(T1, T6);
	  {
	       V Ts, Tx, Tm, Ty, Ta, TA, Tf, TB, To, Tr, Tq;
	       To = LD(&(x[0]), dist, &(x[0]));
	       Tq = LD(&(x[WS(ios, 4)]), dist, &(x[0]));
	       Tr = VZMUL(Tp, Tq);
	       Ts = VSUB(To, Tr);
	       Tx = VADD(To, Tr);
	       {
		    V Ti, Tl, Th, Tk;
		    Th = LD(&(x[WS(ios, 2)]), dist, &(x[0]));
		    Ti = VZMUL(T5, Th);
		    Tk = LD(&(x[WS(ios, 6)]), dist, &(x[0]));
		    Tl = VZMUL(Tj, Tk);
		    Tm = VSUB(Ti, Tl);
		    Ty = VADD(Ti, Tl);
	       }
	       {
		    V T3, T9, T2, T8;
		    T2 = LD(&(x[WS(ios, 1)]), dist, &(x[WS(ios, 1)]));
		    T3 = VZMUL(T1, T2);
		    T8 = LD(&(x[WS(ios, 5)]), dist, &(x[WS(ios, 1)]));
		    T9 = VZMUL(T7, T8);
		    Ta = VSUB(T3, T9);
		    TA = VADD(T3, T9);
	       }
	       {
		    V Tc, Te, Tb, Td;
		    Tb = LD(&(x[WS(ios, 7)]), dist, &(x[WS(ios, 1)]));
		    Tc = VZMUL(T6, Tb);
		    Td = LD(&(x[WS(ios, 3)]), dist, &(x[WS(ios, 1)]));
		    Te = VZMUL(T4, Td);
		    Tf = VSUB(Tc, Te);
		    TB = VADD(Tc, Te);
	       }
	       {
		    V Tz, TC, TD, TE;
		    Tz = VSUB(Tx, Ty);
		    TC = VBYI(VSUB(TA, TB));
		    ST(&(x[WS(ios, 6)]), VSUB(Tz, TC), dist, &(x[0]));
		    ST(&(x[WS(ios, 2)]), VADD(Tz, TC), dist, &(x[0]));
		    TD = VADD(Tx, Ty);
		    TE = VADD(TA, TB);
		    ST(&(x[WS(ios, 4)]), VSUB(TD, TE), dist, &(x[0]));
		    ST(&(x[0]), VADD(TD, TE), dist, &(x[0]));
		    {
			 V Tn, Tv, Tu, Tw, Tg, Tt;
			 Tg = VMUL(LDK(KP707106781), VSUB(Ta, Tf));
			 Tn = VBYI(VSUB(Tg, Tm));
			 Tv = VBYI(VADD(Tm, Tg));
			 Tt = VMUL(LDK(KP707106781), VADD(Ta, Tf));
			 Tu = VSUB(Ts, Tt);
			 Tw = VADD(Ts, Tt);
			 ST(&(x[WS(ios, 3)]), VADD(Tn, Tu), dist, &(x[WS(ios, 1)]));
			 ST(&(x[WS(ios, 7)]), VSUB(Tw, Tv), dist, &(x[WS(ios, 1)]));
			 ST(&(x[WS(ios, 5)]), VSUB(Tu, Tn), dist, &(x[WS(ios, 1)]));
			 ST(&(x[WS(ios, 1)]), VADD(Tv, Tw), dist, &(x[WS(ios, 1)]));
		    }
	       }
	  }
     }
     return W;
}

static const tw_instr twinstr[] = {
     VTW(1),
     VTW(3),
     VTW(7),
     {TW_NEXT, VL, 0}
};

static const ct_desc desc = { 8, "t3bv_8", twinstr, &GENUS, {37, 24, 0, 0}, 0, 0, 0 };

void X(codelet_t3bv_8) (planner *p) {
     X(kdft_dit_register) (p, t3bv_8, &desc);
}
#endif				/* HAVE_FMA */