n2bv_20.c

快速fft变换

/*
 * Copyright (c) 2003, 2007-8 Matteo Frigo
 * Copyright (c) 2003, 2007-8 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 Nov 15 20:46:18 EST 2008 */

#include "codelet-dft.h"

#ifdef HAVE_FMA

/* Generated by: ../../../genfft/gen_notw_c -fma -reorder-insns -schedule-for-pipeline -simd -compact -variables 4 -pipeline-latency 8 -sign 1 -n 20 -name n2bv_20 -with-ostride 2 -include n2b.h -store-multiple 2 */

/*
 * This function contains 104 FP additions, 50 FP multiplications,
 * (or, 58 additions, 4 multiplications, 46 fused multiply/add),
 * 79 stack variables, 4 constants, and 50 memory accesses
 */
#include "n2b.h"

static void n2bv_20(const R *ri, const R *ii, R *ro, R *io, stride is, stride os, INT v, INT ivs, INT ovs)
{
     DVK(KP559016994, +0.559016994374947424102293417182819058860154590);
     DVK(KP618033988, +0.618033988749894848204586834365638117720309180);
     DVK(KP951056516, +0.951056516295153572116439333379382143405698634);
     DVK(KP250000000, +0.250000000000000000000000000000000000000000000);
     INT i;
     const R *xi;
     R *xo;
     xi = ii;
     xo = io;
     for (i = v; i > 0; i = i - VL, xi = xi + (VL * ivs), xo = xo + (VL * ovs), MAKE_VOLATILE_STRIDE(is), MAKE_VOLATILE_STRIDE(os)) {
	  V T1H, T1I, TS, TA, TN, TV, T1M, T1N, T1O, T1P, T1R, T1S, TK, TU, TR;
	  V Tl;
	  {
	       V T3, TE, T1r, T13, Ta, TL, Tz, TG, Ts, TF, Th, TM, T1u, T1C, T1n;
	       V T1a, T1m, T1h, T1x, T1D, Tk, Ti;
	       {
		    V T1, T2, TC, TD;
		    T1 = LD(&(xi[0]), ivs, &(xi[0]));
		    T2 = LD(&(xi[WS(is, 10)]), ivs, &(xi[0]));
		    TC = LD(&(xi[WS(is, 5)]), ivs, &(xi[WS(is, 1)]));
		    TD = LD(&(xi[WS(is, 15)]), ivs, &(xi[WS(is, 1)]));
		    {
			 V T14, T6, T1c, Tv, Tm, T1f, Ty, T17, T9, Tn, Tp, T1b, Td, Tq, Te;
			 V Tf, T15, To;
			 {
			      V Tw, Tx, T7, T8, Tb, Tc;
			      {
				   V T4, T5, Tt, Tu, T11, T12;
				   T4 = LD(&(xi[WS(is, 4)]), ivs, &(xi[0]));
				   T5 = LD(&(xi[WS(is, 14)]), ivs, &(xi[0]));
				   Tt = LD(&(xi[WS(is, 13)]), ivs, &(xi[WS(is, 1)]));
				   Tu = LD(&(xi[WS(is, 3)]), ivs, &(xi[WS(is, 1)]));
				   Tw = LD(&(xi[WS(is, 17)]), ivs, &(xi[WS(is, 1)]));
				   T3 = VSUB(T1, T2);
				   T11 = VADD(T1, T2);
				   TE = VSUB(TC, TD);
				   T12 = VADD(TC, TD);
				   T14 = VADD(T4, T5);
				   T6 = VSUB(T4, T5);
				   T1c = VADD(Tt, Tu);
				   Tv = VSUB(Tt, Tu);
				   Tx = LD(&(xi[WS(is, 7)]), ivs, &(xi[WS(is, 1)]));
				   T7 = LD(&(xi[WS(is, 16)]), ivs, &(xi[0]));
				   T8 = LD(&(xi[WS(is, 6)]), ivs, &(xi[0]));
				   T1r = VADD(T11, T12);
				   T13 = VSUB(T11, T12);
			      }
			      Tb = LD(&(xi[WS(is, 8)]), ivs, &(xi[0]));
			      Tc = LD(&(xi[WS(is, 18)]), ivs, &(xi[0]));
			      Tm = LD(&(xi[WS(is, 9)]), ivs, &(xi[WS(is, 1)]));
			      T1f = VADD(Tw, Tx);
			      Ty = VSUB(Tw, Tx);
			      T17 = VADD(T7, T8);
			      T9 = VSUB(T7, T8);
			      Tn = LD(&(xi[WS(is, 19)]), ivs, &(xi[WS(is, 1)]));
			      Tp = LD(&(xi[WS(is, 1)]), ivs, &(xi[WS(is, 1)]));
			      T1b = VADD(Tb, Tc);
			      Td = VSUB(Tb, Tc);
			      Tq = LD(&(xi[WS(is, 11)]), ivs, &(xi[WS(is, 1)]));
			      Te = LD(&(xi[WS(is, 12)]), ivs, &(xi[0]));
			      Tf = LD(&(xi[WS(is, 2)]), ivs, &(xi[0]));
			 }
			 Ta = VADD(T6, T9);
			 TL = VSUB(T6, T9);
			 T15 = VADD(Tm, Tn);
			 To = VSUB(Tm, Tn);
			 Tz = VSUB(Tv, Ty);
			 TG = VADD(Tv, Ty);
			 {
			      V T1d, T1v, T18, Tr, T1e, Tg, T16, T1s;
			      T1d = VSUB(T1b, T1c);
			      T1v = VADD(T1b, T1c);
			      T18 = VADD(Tp, Tq);
			      Tr = VSUB(Tp, Tq);
			      T1e = VADD(Te, Tf);
			      Tg = VSUB(Te, Tf);
			      T16 = VSUB(T14, T15);
			      T1s = VADD(T14, T15);
			      {
				   V T1t, T19, T1w, T1g;
				   T1t = VADD(T17, T18);
				   T19 = VSUB(T17, T18);
				   Ts = VSUB(To, Tr);
				   TF = VADD(To, Tr);
				   T1w = VADD(T1e, T1f);
				   T1g = VSUB(T1e, T1f);
				   Th = VADD(Td, Tg);
				   TM = VSUB(Td, Tg);
				   T1u = VADD(T1s, T1t);
				   T1C = VSUB(T1s, T1t);
				   T1n = VSUB(T16, T19);
				   T1a = VADD(T16, T19);
				   T1m = VSUB(T1d, T1g);
				   T1h = VADD(T1d, T1g);
				   T1x = VADD(T1v, T1w);
				   T1D = VSUB(T1v, T1w);
			      }
			 }
		    }
	       }
	       Tk = VSUB(Ta, Th);
	       Ti = VADD(Ta, Th);
	       {
		    V TJ, T1k, T1A, TZ, Tj, T1E, T1G, TI, T10, T1j, T1z, T1i, T1y, TH;
		    TJ = VSUB(TF, TG);
		    TH = VADD(TF, TG);
		    T1i = VADD(T1a, T1h);
		    T1k = VSUB(T1a, T1h);
		    T1y = VADD(T1u, T1x);
		    T1A = VSUB(T1u, T1x);
		    TZ = VADD(T3, Ti);
		    Tj = VFNMS(LDK(KP250000000), Ti, T3);
		    T1E = VMUL(LDK(KP951056516), VFMA(LDK(KP618033988), T1D, T1C));
		    T1G = VMUL(LDK(KP951056516), VFNMS(LDK(KP618033988), T1C, T1D));
		    TI = VFNMS(LDK(KP250000000), TH, TE);
		    T10 = VADD(TE, TH);
		    T1j = VFNMS(LDK(KP250000000), T1i, T13);
		    T1H = VADD(T1r, T1y);
		    STM2(&(xo[0]), T1H, ovs, &(xo[0]));
		    T1z = VFNMS(LDK(KP250000000), T1y, T1r);
		    T1I = VADD(T13, T1i);
		    STM2(&(xo[20]), T1I, ovs, &(xo[0]));
		    {
			 V T1J, T1K, T1p, T1l, T1o, T1q, T1F, T1B, T1L, T1Q;
			 TS = VFNMS(LDK(KP618033988), Ts, Tz);
			 TA = VFMA(LDK(KP618033988), Tz, Ts);
			 TN = VFMA(LDK(KP618033988), TM, TL);
			 TV = VFNMS(LDK(KP618033988), TL, TM);
			 T1J = VFMAI(T10, TZ);
			 STM2(&(xo[10]), T1J, ovs, &(xo[2]));
			 T1K = VFNMSI(T10, TZ);
			 STM2(&(xo[30]), T1K, ovs, &(xo[2]));
			 T1p = VFMA(LDK(KP559016994), T1k, T1j);
			 T1l = VFNMS(LDK(KP559016994), T1k, T1j);
			 T1o = VMUL(LDK(KP951056516), VFNMS(LDK(KP618033988), T1n, T1m));
			 T1q = VMUL(LDK(KP951056516), VFMA(LDK(KP618033988), T1m, T1n));
			 T1F = VFNMS(LDK(KP559016994), T1A, T1z);
			 T1B = VFMA(LDK(KP559016994), T1A, T1z);
			 T1L = VFNMSI(T1q, T1p);
			 STM2(&(xo[28]), T1L, ovs, &(xo[0]));
			 STN2(&(xo[28]), T1L, T1K, ovs);
			 T1M = VFMAI(T1q, T1p);
			 STM2(&(xo[12]), T1M, ovs, &(xo[0]));
			 T1N = VFMAI(T1o, T1l);
			 STM2(&(xo[36]), T1N, ovs, &(xo[0]));
			 T1O = VFNMSI(T1o, T1l);
			 STM2(&(xo[4]), T1O, ovs, &(xo[0]));
			 T1P = VFMAI(T1E, T1B);
			 STM2(&(xo[32]), T1P, ovs, &(xo[0]));
			 T1Q = VFNMSI(T1E, T1B);
			 STM2(&(xo[8]), T1Q, ovs, &(xo[0]));
			 STN2(&(xo[8]), T1Q, T1J, ovs);
			 T1R = VFNMSI(T1G, T1F);
			 STM2(&(xo[24]), T1R, ovs, &(xo[0]));
			 T1S = VFMAI(T1G, T1F);
			 STM2(&(xo[16]), T1S, ovs, &(xo[0]));
			 TK = VFMA(LDK(KP559016994), TJ, TI);
			 TU = VFNMS(LDK(KP559016994), TJ, TI);
			 TR = VFNMS(LDK(KP559016994), Tk, Tj);
			 Tl = VFMA(LDK(KP559016994), Tk, Tj);
		    }
	       }
	  }
	  {
	       V TY, TW, TO, TQ, TB, TP, TX, TT;
	       TY = VFMA(LDK(KP951056516), TV, TU);
	       TW = VFNMS(LDK(KP951056516), TV, TU);
	       TO = VFMA(LDK(KP951056516), TN, TK);
	       TQ = VFNMS(LDK(KP951056516), TN, TK);
	       TB = VFNMS(LDK(KP951056516), TA, Tl);
	       TP = VFMA(LDK(KP951056516), TA, Tl);
	       TX = VFNMS(LDK(KP951056516), TS, TR);
	       TT = VFMA(LDK(KP951056516), TS, TR);
	       {
		    V T1T, T1U, T1V, T1W;
		    T1T = VFMAI(TQ, TP);
		    STM2(&(xo[18]), T1T, ovs, &(xo[2]));
		    STN2(&(xo[16]), T1S, T1T, ovs);
		    T1U = VFNMSI(TQ, TP);
		    STM2(&(xo[22]), T1U, ovs, &(xo[2]));
		    STN2(&(xo[20]), T1I, T1U, ovs);
		    T1V = VFMAI(TO, TB);
		    STM2(&(xo[2]), T1V, ovs, &(xo[2]));
		    STN2(&(xo[0]), T1H, T1V, ovs);
		    T1W = VFNMSI(TO, TB);
		    STM2(&(xo[38]), T1W, ovs, &(xo[2]));
		    STN2(&(xo[36]), T1N, T1W, ovs);
		    {
			 V T1X, T1Y, T1Z, T20;
			 T1X = VFMAI(TW, TT);
			 STM2(&(xo[34]), T1X, ovs, &(xo[2]));
			 STN2(&(xo[32]), T1P, T1X, ovs);
			 T1Y = VFNMSI(TW, TT);
			 STM2(&(xo[6]), T1Y, ovs, &(xo[2]));
			 STN2(&(xo[4]), T1O, T1Y, ovs);
			 T1Z = VFMAI(TY, TX);
			 STM2(&(xo[26]), T1Z, ovs, &(xo[2]));
			 STN2(&(xo[24]), T1R, T1Z, ovs);
			 T20 = VFNMSI(TY, TX);
			 STM2(&(xo[14]), T20, ovs, &(xo[2]));
			 STN2(&(xo[12]), T1M, T20, ovs);
		    }
	       }
	  }
     }
}