nb_kernel314_ppc_altivec.c

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/* -*- mode: c; tab-width: 4; indent-tabs-mode: n; c-basic-offset: 4 -*- 
 *
 * $Id: nb_kernel314_ppc_altivec.c,v 1.1 2004/12/26 19:26:00 lindahl Exp $
 * 
 * This file is part of Gromacs        Copyright (c) 1991-2004
 * David van der Spoel, Erik Lindahl, University of Groningen.
 *
 * 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.
 *
 * To help us fund GROMACS development, we humbly ask that you cite
 * the research papers on the package. Check out http://www.gromacs.org
 * 
 * And Hey:
 * Gnomes, ROck Monsters And Chili Sauce
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

/* Must come directly after config.h */
#include <gmx_thread.h>


#include "ppc_altivec_util.h"
#include "nb_kernel314_ppc_altivec.h"



void 
nb_kernel314_ppc_altivec  (int *             p_nri,
                       int               iinr[],
                       int               jindex[],
                       int               jjnr[],
                       int               shift[],
                       float             shiftvec[],
                       float             fshift[],
                       int               gid[],
                       float             pos[],
                       float             faction[],
                       float             charge[],
                       float *           p_facel,
                       float *           p_krf,
                       float *           p_crf,
                       float             Vc[],
                       int               type[],
                       int *             p_ntype,
                       float             vdwparam[],
                       float             Vvdw[],
                       float *           p_tabscale,
                       float             VFtab[],
                       float             invsqrta[],
                       float             dvda[],
                       float *           p_gbtabscale,
                       float             GBtab[],
                       int *             p_nthreads,
                       int *             count,
                       void *            mtx,
                       int *             outeriter,
                       int *             inneriter,
					   float *           work)
{
	vector float ix1,iy1,iz1,ix2,iy2,iz2,ix3,iy3,iz3,ix4,iy4,iz4;
	vector float jx1,jy1,jz1,jx2,jy2,jz2,jx3,jy3,jz3,jx4,jy4,jz4;

	vector float dx11,dy11,dz11;
	vector float dx22,dy22,dz22,dx23,dy23,dz23,dx24,dy24,dz24;
	vector float dx32,dy32,dz32,dx33,dy33,dz33,dx34,dy34,dz34;
	vector float dx42,dy42,dz42,dx43,dy43,dz43,dx44,dy44,dz44;

	vector float rsq11,rsq22,rsq23,rsq24,rsq32,rsq33,rsq34,rsq42,rsq43,rsq44;
	vector float r22,r23,r24,r32,r33,r34,r42,r43,r44;
	vector float rinvsq11,rinv22,rinv23,rinv24,rinv32,rinv33;
	vector float rinv34,rinv42,rinv43,rinv44;

	vector float vfacel,nul;
	vector float fs11,fs22,fs23,fs24,fs32,fs33,fs34,fs42,fs43,fs44;
	vector float fix1,fiy1,fiz1,fix2,fiy2,fiz2,fix3,fiy3,fiz3,fix4,fiy4,fiz4;
	vector float fjx1,fjy1,fjz1,fjx2,fjy2,fjz2,fjx3,fjy3,fjz3,fjx4,fjy4,fjz4;
	vector float vctot,qqMM,qqMH,qqHH,qM,qH,c6,c12,Vvdw6,Vvdw12,rinvsix;
	vector float Vvdwtot,tsc,qqMMt,qqMHt,qqHHt,c6t,c12t;
	vector float VV22c,FF22c,VV23c,FF23c,VV24c,FF24c;
	vector float VV32c,FF32c,VV33c,FF33c,VV34c,FF34c;
	vector float VV42c,FF42c,VV43c,FF43c,VV44c,FF44c;

	int n,k,ii,is3,ii3,nj0,nj1;
	int jnra,jnrb,jnrc,jnrd,tp,tj;
	int j3a,j3b,j3c,j3d;
	int nri, ntype, nouter, ninner;
#ifdef GMX_THREADS
	int nn0, nn1;
#endif

    nouter   = 0;
    ninner   = 0;
    nri      = *p_nri;
    ntype    = *p_ntype;
	nul=vec_zero();
	vfacel=load_float_and_splat(p_facel);
	tsc=load_float_and_splat(p_tabscale);
	ii        = iinr[0];
	qH        = load_float_and_splat(charge+ii+1);
	qM        = load_float_and_splat(charge+ii+3);
	qqMM      = vec_madd(qM,qM,nul);
	qqMH      = vec_madd(qM,qH,nul);
	qqHH      = vec_madd(qH,qH,nul);
	qqMM      = vec_madd(qqMM,vfacel,nul);
	qqMH      = vec_madd(qqMH,vfacel,nul);
	qqHH      = vec_madd(qqHH,vfacel,nul);
	tp        = 2*type[ii];
	tj        = (ntype+1)*tp;
	load_1_pair(vdwparam+tj,&c6,&c12);
	c6        = vec_splat(c6,0);
	c12       = vec_splat(c12,0);

#ifdef GMX_THREADS
    nthreads = *p_nthreads;
	do {
		gmx_thread_mutex_lock((gmx_thread_mutex_t *)mtx);
		nn0              = *count;
		nn1              = nn0+(nri-nn0)/(2*nthreads)+3;
		*count           = nn1;
		gmx_thread_mutex_unlock((gmx_thread_mutex_t *)mtx);
		if(nn1>nri) nn1=nri;
		for(n=nn0; (n<nn1); n++) {
#if 0
		} /* maintain correct indentation even with conditional left braces */
#endif
#else /* without gmx_threads */
		for(n=0;n<nri;n++) {
#endif  
			is3        = 3*shift[n];
			ii         = iinr[n];
			ii3        = 3*ii;
			load_1_4atoms_shift_and_splat(pos+ii3,shiftvec+is3,&ix1,&iy1,&iz1,
										  &ix2,&iy2,&iz2,&ix3,&iy3,&iz3,
										  &ix4,&iy4,&iz4);

			vctot      = nul;
			Vvdwtot     = nul;
			fix1       = nul;
			fiy1       = nul;
			fiz1       = nul;
			fix2       = nul;
			fiy2       = nul;
			fiz2       = nul;
			fix3       = nul;
			fiy3       = nul;
			fiz3       = nul;
			fix4       = nul;
			fiy4       = nul;
			fiz4       = nul;
			nj0        = jindex[n];
			nj1        = jindex[n+1];
    
			for(k=nj0; k<(nj1-3); k+=4) {
				jnra            = jjnr[k];
				jnrb            = jjnr[k+1];
				jnrc            = jjnr[k+2];
				jnrd            = jjnr[k+3];
				j3a             = 3*jnra;
				j3b             = 3*jnrb;
				j3c             = 3*jnrc;
				j3d             = 3*jnrd;
				load_4_4atoms(pos+j3a,pos+j3b,pos+j3c,pos+j3d,
							  &jx1,&jy1,&jz1,&jx2,&jy2,&jz2,&jx3,&jy3,&jz3,
							  &jx4,&jy4,&jz4);

				dx11            = vec_sub(ix1,jx1);
				dy11            = vec_sub(iy1,jy1);
				dz11            = vec_sub(iz1,jz1);
				dx22            = vec_sub(ix2,jx2);
				dy22            = vec_sub(iy2,jy2);
				dz22            = vec_sub(iz2,jz2);
				dx23            = vec_sub(ix2,jx3);
				dy23            = vec_sub(iy2,jy3);
				dz23            = vec_sub(iz2,jz3);
				dx24            = vec_sub(ix2,jx4);
				dy24            = vec_sub(iy2,jy4);
				dz24            = vec_sub(iz2,jz4);
				dx32            = vec_sub(ix3,jx2);
				dy32            = vec_sub(iy3,jy2);
				dz32            = vec_sub(iz3,jz2);
				dx33            = vec_sub(ix3,jx3);
				dy33            = vec_sub(iy3,jy3);
				dz33            = vec_sub(iz3,jz3);
				dx34            = vec_sub(ix3,jx4);
				dy34            = vec_sub(iy3,jy4);
				dz34            = vec_sub(iz3,jz4);
				dx42            = vec_sub(ix4,jx2);
				dy42            = vec_sub(iy4,jy2);
				dz42            = vec_sub(iz4,jz2);
				dx43            = vec_sub(ix4,jx3);
				dy43            = vec_sub(iy4,jy3);
				dz43            = vec_sub(iz4,jz3);
				dx44            = vec_sub(ix4,jx4);
				dy44            = vec_sub(iy4,jy4);
				dz44            = vec_sub(iz4,jz4);

				rsq11           = vec_madd(dx11,dx11,nul);
				rsq22           = vec_madd(dx22,dx22,nul);
				rsq23           = vec_madd(dx23,dx23,nul);
				rsq24           = vec_madd(dx24,dx24,nul);
				rsq32           = vec_madd(dx32,dx32,nul);
				rsq33           = vec_madd(dx33,dx33,nul);
				rsq34           = vec_madd(dx34,dx34,nul);
				rsq42           = vec_madd(dx42,dx42,nul);
				rsq43           = vec_madd(dx43,dx43,nul);
				rsq44           = vec_madd(dx44,dx44,nul);

				rsq11           = vec_madd(dy11,dy11,rsq11);
				rsq22           = vec_madd(dy22,dy22,rsq22);
				rsq23           = vec_madd(dy23,dy23,rsq23);
				rsq24           = vec_madd(dy24,dy24,rsq24);
				rsq32           = vec_madd(dy32,dy32,rsq32);
				rsq33           = vec_madd(dy33,dy33,rsq33);
				rsq34           = vec_madd(dy34,dy34,rsq34);
				rsq42           = vec_madd(dy42,dy42,rsq42);
				rsq43           = vec_madd(dy43,dy43,rsq43);
				rsq44           = vec_madd(dy44,dy44,rsq44);
     
				rsq11           = vec_madd(dz11,dz11,rsq11);
				rsq22           = vec_madd(dz22,dz22,rsq22);
				rsq23           = vec_madd(dz23,dz23,rsq23);
				rsq24           = vec_madd(dz24,dz24,rsq24);
				rsq32           = vec_madd(dz32,dz32,rsq32);
				rsq33           = vec_madd(dz33,dz33,rsq33);
				rsq34           = vec_madd(dz34,dz34,rsq34);
				rsq42           = vec_madd(dz42,dz42,rsq42);
				rsq43           = vec_madd(dz43,dz43,rsq43);
				rsq44           = vec_madd(dz44,dz44,rsq44);

				rinvsq11        = do_recip(rsq11);
				do_9_invsqrt(rsq22,rsq23,rsq24,
							 rsq32,rsq33,rsq34,
							 rsq42,rsq43,rsq44,
							 &rinv22,&rinv23,&rinv24,
							 &rinv32,&rinv33,&rinv34,
							 &rinv42,&rinv43,&rinv44);

				rinvsix         = vec_madd(rinvsq11,rinvsq11,nul);
				rinvsix         = vec_madd(rinvsix,rinvsq11,nul);
				r22             = vec_madd(rsq22,rinv22,nul); 
				r23             = vec_madd(rsq23,rinv23,nul); 
				r24             = vec_madd(rsq24,rinv24,nul); 
				r32             = vec_madd(rsq32,rinv32,nul); 
				r33             = vec_madd(rsq33,rinv33,nul); 
				r34             = vec_madd(rsq34,rinv34,nul); 
				r42             = vec_madd(rsq42,rinv42,nul); 
				r43             = vec_madd(rsq43,rinv43,nul); 
				r44             = vec_madd(rsq44,rinv44,nul); 
				Vvdw6            = vec_madd(c6,rinvsix,nul);
				Vvdw12           = vec_madd(c12,vec_madd(rinvsix,rinvsix,nul),
										   nul);
				fs11            = vec_madd(vec_twelve(),Vvdw12,nul);
				fs11            = vec_nmsub(vec_six(),Vvdw6,fs11);
				Vvdwtot          = vec_add(Vvdwtot,Vvdw12);
				Vvdwtot          = vec_sub(Vvdwtot,Vvdw6);
 
				do_4_ctable_coul(VFtab,vec_madd(r22,tsc,nul),&VV22c,&FF22c);
				do_4_ctable_coul(VFtab,vec_madd(r23,tsc,nul),&VV23c,&FF23c);
				do_4_ctable_coul(VFtab,vec_madd(r24,tsc,nul),&VV24c,&FF24c);
				do_4_ctable_coul(VFtab,vec_madd(r32,tsc,nul),&VV32c,&FF32c);
				do_4_ctable_coul(VFtab,vec_madd(r33,tsc,nul),&VV33c,&FF33c);
				do_4_ctable_coul(VFtab,vec_madd(r34,tsc,nul),&VV34c,&FF34c);
				do_4_ctable_coul(VFtab,vec_madd(r42,tsc,nul),&VV42c,&FF42c);
				do_4_ctable_coul(VFtab,vec_madd(r43,tsc,nul),&VV43c,&FF43c);
				do_4_ctable_coul(VFtab,vec_madd(r44,tsc,nul),&VV44c,&FF44c);

				fs22            = vec_nmsub(qqHH,FF22c,nul);
				fs23            = vec_nmsub(qqHH,FF23c,nul);
				fs24            = vec_nmsub(qqMH,FF24c,nul);
				fs32            = vec_nmsub(qqHH,FF32c,nul);
				fs33            = vec_nmsub(qqHH,FF33c,nul);
				fs34            = vec_nmsub(qqMH,FF34c,nul);
				fs42            = vec_nmsub(qqMH,FF42c,nul);
				fs43            = vec_nmsub(qqMH,FF43c,nul);
				fs44            = vec_nmsub(qqMM,FF44c,nul);

				vctot           = vec_madd(qqHH,VV22c,vctot);
				vctot           = vec_madd(qqHH,VV23c,vctot);
				vctot           = vec_madd(qqMH,VV24c,vctot);
				vctot           = vec_madd(qqHH,VV32c,vctot);
				vctot           = vec_madd(qqHH,VV33c,vctot);
				vctot           = vec_madd(qqMH,VV34c,vctot);
				vctot           = vec_madd(qqMH,VV42c,vctot);
				vctot           = vec_madd(qqMH,VV43c,vctot);
				vctot           = vec_madd(qqMM,VV44c,vctot);

				fs22            = vec_madd(fs22,tsc,nul);
				fs23            = vec_madd(fs23,tsc,nul);
				fs24            = vec_madd(fs24,tsc,nul);
				fs32            = vec_madd(fs32,tsc,nul);
				fs33            = vec_madd(fs33,tsc,nul);
				fs34            = vec_madd(fs34,tsc,nul);
				fs42            = vec_madd(fs42,tsc,nul);
				fs43            = vec_madd(fs43,tsc,nul);
				fs44            = vec_madd(fs44,tsc,nul);
      
				fs11            = vec_madd(fs11,rinvsq11,nul);
				fs22            = vec_madd(fs22,rinv22,nul);
				fs23            = vec_madd(fs23,rinv23,nul);
				fs24            = vec_madd(fs24,rinv24,nul);
				fs32            = vec_madd(fs32,rinv32,nul);
				fs33            = vec_madd(fs33,rinv33,nul);
				fs34            = vec_madd(fs34,rinv34,nul);
				fs42            = vec_madd(fs42,rinv42,nul);
				fs43            = vec_madd(fs43,rinv43,nul);
				fs44            = vec_madd(fs44,rinv44,nul);      

				fix1            = vec_madd(fs11,dx11,fix1);
				fiy1            = vec_madd(fs11,dy11,fiy1);
				fiz1            = vec_madd(fs11,dz11,fiz1);

				fix2            = vec_madd(fs22,dx22,fix2);
				fiy2            = vec_madd(fs22,dy22,fiy2);
				fiz2            = vec_madd(fs22,dz22,fiz2);
				fix3            = vec_madd(fs32,dx32,fix3);
				fiy3            = vec_madd(fs32,dy32,fiy3);