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36 * Note: this file was generated by the GROMACS sse4_1_single kernel generator.
44 #include "../nb_kernel.h"
45 #include "types/simple.h"
49 #include "gmx_math_x86_sse4_1_single.h"
50 #include "kernelutil_x86_sse4_1_single.h"
53 * Gromacs nonbonded kernel: nb_kernel_ElecGB_VdwLJ_GeomP1P1_VF_sse4_1_single
54 * Electrostatics interaction: GeneralizedBorn
55 * VdW interaction: LennardJones
56 * Geometry: Particle-Particle
57 * Calculate force/pot: PotentialAndForce
60 nb_kernel_ElecGB_VdwLJ_GeomP1P1_VF_sse4_1_single
61 (t_nblist * gmx_restrict nlist,
62 rvec * gmx_restrict xx,
63 rvec * gmx_restrict ff,
64 t_forcerec * gmx_restrict fr,
65 t_mdatoms * gmx_restrict mdatoms,
66 nb_kernel_data_t * gmx_restrict kernel_data,
67 t_nrnb * gmx_restrict nrnb)
69 /* Suffixes 0,1,2,3 refer to particle indices for waters in the inner or outer loop, or
70 * just 0 for non-waters.
71 * Suffixes A,B,C,D refer to j loop unrolling done with SSE, e.g. for the four different
72 * jnr indices corresponding to data put in the four positions in the SIMD register.
74 int i_shift_offset,i_coord_offset,outeriter,inneriter;
75 int j_index_start,j_index_end,jidx,nri,inr,ggid,iidx;
76 int jnrA,jnrB,jnrC,jnrD;
77 int jnrlistA,jnrlistB,jnrlistC,jnrlistD;
78 int j_coord_offsetA,j_coord_offsetB,j_coord_offsetC,j_coord_offsetD;
79 int *iinr,*jindex,*jjnr,*shiftidx,*gid;
81 real *shiftvec,*fshift,*x,*f;
82 real *fjptrA,*fjptrB,*fjptrC,*fjptrD;
84 __m128 tx,ty,tz,fscal,rcutoff,rcutoff2,jidxall;
86 __m128 ix0,iy0,iz0,fix0,fiy0,fiz0,iq0,isai0;
87 int vdwjidx0A,vdwjidx0B,vdwjidx0C,vdwjidx0D;
88 __m128 jx0,jy0,jz0,fjx0,fjy0,fjz0,jq0,isaj0;
89 __m128 dx00,dy00,dz00,rsq00,rinv00,rinvsq00,r00,qq00,c6_00,c12_00;
90 __m128 velec,felec,velecsum,facel,crf,krf,krf2;
93 __m128 vgb,fgb,vgbsum,dvdasum,gbscale,gbtabscale,isaprod,gbqqfactor,gbinvepsdiff,gbeps,dvdatmp;
94 __m128 minushalf = _mm_set1_ps(-0.5);
95 real *invsqrta,*dvda,*gbtab;
97 __m128 rinvsix,rvdw,vvdw,vvdw6,vvdw12,fvdw,fvdw6,fvdw12,vvdwsum,sh_vdw_invrcut6;
100 __m128 one_sixth = _mm_set1_ps(1.0/6.0);
101 __m128 one_twelfth = _mm_set1_ps(1.0/12.0);
103 __m128i ifour = _mm_set1_epi32(4);
104 __m128 rt,vfeps,vftabscale,Y,F,G,H,Heps,Fp,VV,FF;
106 __m128 dummy_mask,cutoff_mask;
107 __m128 signbit = _mm_castsi128_ps( _mm_set1_epi32(0x80000000) );
108 __m128 one = _mm_set1_ps(1.0);
109 __m128 two = _mm_set1_ps(2.0);
115 jindex = nlist->jindex;
117 shiftidx = nlist->shift;
119 shiftvec = fr->shift_vec[0];
120 fshift = fr->fshift[0];
121 facel = _mm_set1_ps(fr->epsfac);
122 charge = mdatoms->chargeA;
123 nvdwtype = fr->ntype;
125 vdwtype = mdatoms->typeA;
127 invsqrta = fr->invsqrta;
129 gbtabscale = _mm_set1_ps(fr->gbtab.scale);
130 gbtab = fr->gbtab.data;
131 gbinvepsdiff = _mm_set1_ps((1.0/fr->epsilon_r) - (1.0/fr->gb_epsilon_solvent));
133 /* Avoid stupid compiler warnings */
134 jnrA = jnrB = jnrC = jnrD = 0;
143 for(iidx=0;iidx<4*DIM;iidx++)
148 /* Start outer loop over neighborlists */
149 for(iidx=0; iidx<nri; iidx++)
151 /* Load shift vector for this list */
152 i_shift_offset = DIM*shiftidx[iidx];
154 /* Load limits for loop over neighbors */
155 j_index_start = jindex[iidx];
156 j_index_end = jindex[iidx+1];
158 /* Get outer coordinate index */
160 i_coord_offset = DIM*inr;
162 /* Load i particle coords and add shift vector */
163 gmx_mm_load_shift_and_1rvec_broadcast_ps(shiftvec+i_shift_offset,x+i_coord_offset,&ix0,&iy0,&iz0);
165 fix0 = _mm_setzero_ps();
166 fiy0 = _mm_setzero_ps();
167 fiz0 = _mm_setzero_ps();
169 /* Load parameters for i particles */
170 iq0 = _mm_mul_ps(facel,_mm_load1_ps(charge+inr+0));
171 isai0 = _mm_load1_ps(invsqrta+inr+0);
172 vdwioffset0 = 2*nvdwtype*vdwtype[inr+0];
174 /* Reset potential sums */
175 velecsum = _mm_setzero_ps();
176 vgbsum = _mm_setzero_ps();
177 vvdwsum = _mm_setzero_ps();
178 dvdasum = _mm_setzero_ps();
180 /* Start inner kernel loop */
181 for(jidx=j_index_start; jidx<j_index_end && jjnr[jidx+3]>=0; jidx+=4)
184 /* Get j neighbor index, and coordinate index */
189 j_coord_offsetA = DIM*jnrA;
190 j_coord_offsetB = DIM*jnrB;
191 j_coord_offsetC = DIM*jnrC;
192 j_coord_offsetD = DIM*jnrD;
194 /* load j atom coordinates */
195 gmx_mm_load_1rvec_4ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB,
196 x+j_coord_offsetC,x+j_coord_offsetD,
199 /* Calculate displacement vector */
200 dx00 = _mm_sub_ps(ix0,jx0);
201 dy00 = _mm_sub_ps(iy0,jy0);
202 dz00 = _mm_sub_ps(iz0,jz0);
204 /* Calculate squared distance and things based on it */
205 rsq00 = gmx_mm_calc_rsq_ps(dx00,dy00,dz00);
207 rinv00 = gmx_mm_invsqrt_ps(rsq00);
209 rinvsq00 = _mm_mul_ps(rinv00,rinv00);
211 /* Load parameters for j particles */
212 jq0 = gmx_mm_load_4real_swizzle_ps(charge+jnrA+0,charge+jnrB+0,
213 charge+jnrC+0,charge+jnrD+0);
214 isaj0 = gmx_mm_load_4real_swizzle_ps(invsqrta+jnrA+0,invsqrta+jnrB+0,
215 invsqrta+jnrC+0,invsqrta+jnrD+0);
216 vdwjidx0A = 2*vdwtype[jnrA+0];
217 vdwjidx0B = 2*vdwtype[jnrB+0];
218 vdwjidx0C = 2*vdwtype[jnrC+0];
219 vdwjidx0D = 2*vdwtype[jnrD+0];
221 /**************************
222 * CALCULATE INTERACTIONS *
223 **************************/
225 r00 = _mm_mul_ps(rsq00,rinv00);
227 /* Compute parameters for interactions between i and j atoms */
228 qq00 = _mm_mul_ps(iq0,jq0);
229 gmx_mm_load_4pair_swizzle_ps(vdwparam+vdwioffset0+vdwjidx0A,
230 vdwparam+vdwioffset0+vdwjidx0B,
231 vdwparam+vdwioffset0+vdwjidx0C,
232 vdwparam+vdwioffset0+vdwjidx0D,
235 /* GENERALIZED BORN AND COULOMB ELECTROSTATICS */
236 isaprod = _mm_mul_ps(isai0,isaj0);
237 gbqqfactor = _mm_xor_ps(signbit,_mm_mul_ps(qq00,_mm_mul_ps(isaprod,gbinvepsdiff)));
238 gbscale = _mm_mul_ps(isaprod,gbtabscale);
240 /* Calculate generalized born table index - this is a separate table from the normal one,
241 * but we use the same procedure by multiplying r with scale and truncating to integer.
243 rt = _mm_mul_ps(r00,gbscale);
244 gbitab = _mm_cvttps_epi32(rt);
245 gbeps = _mm_sub_ps(rt,_mm_round_ps(rt, _MM_FROUND_FLOOR));
246 gbitab = _mm_slli_epi32(gbitab,2);
247 Y = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,0) );
248 F = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,1) );
249 G = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,2) );
250 H = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,3) );
251 _MM_TRANSPOSE4_PS(Y,F,G,H);
252 Heps = _mm_mul_ps(gbeps,H);
253 Fp = _mm_add_ps(F,_mm_mul_ps(gbeps,_mm_add_ps(G,Heps)));
254 VV = _mm_add_ps(Y,_mm_mul_ps(gbeps,Fp));
255 vgb = _mm_mul_ps(gbqqfactor,VV);
257 FF = _mm_add_ps(Fp,_mm_mul_ps(gbeps,_mm_add_ps(G,_mm_add_ps(Heps,Heps))));
258 fgb = _mm_mul_ps(gbqqfactor,_mm_mul_ps(FF,gbscale));
259 dvdatmp = _mm_mul_ps(minushalf,_mm_add_ps(vgb,_mm_mul_ps(fgb,r00)));
260 dvdasum = _mm_add_ps(dvdasum,dvdatmp);
265 gmx_mm_increment_4real_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,_mm_mul_ps(dvdatmp,_mm_mul_ps(isaj0,isaj0)));
266 velec = _mm_mul_ps(qq00,rinv00);
267 felec = _mm_mul_ps(_mm_sub_ps(_mm_mul_ps(velec,rinv00),fgb),rinv00);
269 /* LENNARD-JONES DISPERSION/REPULSION */
271 rinvsix = _mm_mul_ps(_mm_mul_ps(rinvsq00,rinvsq00),rinvsq00);
272 vvdw6 = _mm_mul_ps(c6_00,rinvsix);
273 vvdw12 = _mm_mul_ps(c12_00,_mm_mul_ps(rinvsix,rinvsix));
274 vvdw = _mm_sub_ps( _mm_mul_ps(vvdw12,one_twelfth) , _mm_mul_ps(vvdw6,one_sixth) );
275 fvdw = _mm_mul_ps(_mm_sub_ps(vvdw12,vvdw6),rinvsq00);
277 /* Update potential sum for this i atom from the interaction with this j atom. */
278 velecsum = _mm_add_ps(velecsum,velec);
279 vgbsum = _mm_add_ps(vgbsum,vgb);
280 vvdwsum = _mm_add_ps(vvdwsum,vvdw);
282 fscal = _mm_add_ps(felec,fvdw);
284 /* Calculate temporary vectorial force */
285 tx = _mm_mul_ps(fscal,dx00);
286 ty = _mm_mul_ps(fscal,dy00);
287 tz = _mm_mul_ps(fscal,dz00);
289 /* Update vectorial force */
290 fix0 = _mm_add_ps(fix0,tx);
291 fiy0 = _mm_add_ps(fiy0,ty);
292 fiz0 = _mm_add_ps(fiz0,tz);
294 fjptrA = f+j_coord_offsetA;
295 fjptrB = f+j_coord_offsetB;
296 fjptrC = f+j_coord_offsetC;
297 fjptrD = f+j_coord_offsetD;
298 gmx_mm_decrement_1rvec_4ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,tx,ty,tz);
300 /* Inner loop uses 71 flops */
306 /* Get j neighbor index, and coordinate index */
307 jnrlistA = jjnr[jidx];
308 jnrlistB = jjnr[jidx+1];
309 jnrlistC = jjnr[jidx+2];
310 jnrlistD = jjnr[jidx+3];
311 /* Sign of each element will be negative for non-real atoms.
312 * This mask will be 0xFFFFFFFF for dummy entries and 0x0 for real ones,
313 * so use it as val = _mm_andnot_ps(mask,val) to clear dummy entries.
315 dummy_mask = gmx_mm_castsi128_ps(_mm_cmplt_epi32(_mm_loadu_si128((const __m128i *)(jjnr+jidx)),_mm_setzero_si128()));
316 jnrA = (jnrlistA>=0) ? jnrlistA : 0;
317 jnrB = (jnrlistB>=0) ? jnrlistB : 0;
318 jnrC = (jnrlistC>=0) ? jnrlistC : 0;
319 jnrD = (jnrlistD>=0) ? jnrlistD : 0;
320 j_coord_offsetA = DIM*jnrA;
321 j_coord_offsetB = DIM*jnrB;
322 j_coord_offsetC = DIM*jnrC;
323 j_coord_offsetD = DIM*jnrD;
325 /* load j atom coordinates */
326 gmx_mm_load_1rvec_4ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB,
327 x+j_coord_offsetC,x+j_coord_offsetD,
330 /* Calculate displacement vector */
331 dx00 = _mm_sub_ps(ix0,jx0);
332 dy00 = _mm_sub_ps(iy0,jy0);
333 dz00 = _mm_sub_ps(iz0,jz0);
335 /* Calculate squared distance and things based on it */
336 rsq00 = gmx_mm_calc_rsq_ps(dx00,dy00,dz00);
338 rinv00 = gmx_mm_invsqrt_ps(rsq00);
340 rinvsq00 = _mm_mul_ps(rinv00,rinv00);
342 /* Load parameters for j particles */
343 jq0 = gmx_mm_load_4real_swizzle_ps(charge+jnrA+0,charge+jnrB+0,
344 charge+jnrC+0,charge+jnrD+0);
345 isaj0 = gmx_mm_load_4real_swizzle_ps(invsqrta+jnrA+0,invsqrta+jnrB+0,
346 invsqrta+jnrC+0,invsqrta+jnrD+0);
347 vdwjidx0A = 2*vdwtype[jnrA+0];
348 vdwjidx0B = 2*vdwtype[jnrB+0];
349 vdwjidx0C = 2*vdwtype[jnrC+0];
350 vdwjidx0D = 2*vdwtype[jnrD+0];
352 /**************************
353 * CALCULATE INTERACTIONS *
354 **************************/
356 r00 = _mm_mul_ps(rsq00,rinv00);
357 r00 = _mm_andnot_ps(dummy_mask,r00);
359 /* Compute parameters for interactions between i and j atoms */
360 qq00 = _mm_mul_ps(iq0,jq0);
361 gmx_mm_load_4pair_swizzle_ps(vdwparam+vdwioffset0+vdwjidx0A,
362 vdwparam+vdwioffset0+vdwjidx0B,
363 vdwparam+vdwioffset0+vdwjidx0C,
364 vdwparam+vdwioffset0+vdwjidx0D,
367 /* GENERALIZED BORN AND COULOMB ELECTROSTATICS */
368 isaprod = _mm_mul_ps(isai0,isaj0);
369 gbqqfactor = _mm_xor_ps(signbit,_mm_mul_ps(qq00,_mm_mul_ps(isaprod,gbinvepsdiff)));
370 gbscale = _mm_mul_ps(isaprod,gbtabscale);
372 /* Calculate generalized born table index - this is a separate table from the normal one,
373 * but we use the same procedure by multiplying r with scale and truncating to integer.
375 rt = _mm_mul_ps(r00,gbscale);
376 gbitab = _mm_cvttps_epi32(rt);
377 gbeps = _mm_sub_ps(rt,_mm_round_ps(rt, _MM_FROUND_FLOOR));
378 gbitab = _mm_slli_epi32(gbitab,2);
379 Y = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,0) );
380 F = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,1) );
381 G = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,2) );
382 H = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,3) );
383 _MM_TRANSPOSE4_PS(Y,F,G,H);
384 Heps = _mm_mul_ps(gbeps,H);
385 Fp = _mm_add_ps(F,_mm_mul_ps(gbeps,_mm_add_ps(G,Heps)));
386 VV = _mm_add_ps(Y,_mm_mul_ps(gbeps,Fp));
387 vgb = _mm_mul_ps(gbqqfactor,VV);
389 FF = _mm_add_ps(Fp,_mm_mul_ps(gbeps,_mm_add_ps(G,_mm_add_ps(Heps,Heps))));
390 fgb = _mm_mul_ps(gbqqfactor,_mm_mul_ps(FF,gbscale));
391 dvdatmp = _mm_mul_ps(minushalf,_mm_add_ps(vgb,_mm_mul_ps(fgb,r00)));
392 dvdasum = _mm_add_ps(dvdasum,dvdatmp);
393 /* The pointers to scratch make sure that this code with compilers that take gmx_restrict seriously (e.g. icc 13) really can't screw things up. */
394 fjptrA = (jnrlistA>=0) ? dvda+jnrA : scratch;
395 fjptrB = (jnrlistB>=0) ? dvda+jnrB : scratch;
396 fjptrC = (jnrlistC>=0) ? dvda+jnrC : scratch;
397 fjptrD = (jnrlistD>=0) ? dvda+jnrD : scratch;
398 gmx_mm_increment_4real_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,_mm_mul_ps(dvdatmp,_mm_mul_ps(isaj0,isaj0)));
399 velec = _mm_mul_ps(qq00,rinv00);
400 felec = _mm_mul_ps(_mm_sub_ps(_mm_mul_ps(velec,rinv00),fgb),rinv00);
402 /* LENNARD-JONES DISPERSION/REPULSION */
404 rinvsix = _mm_mul_ps(_mm_mul_ps(rinvsq00,rinvsq00),rinvsq00);
405 vvdw6 = _mm_mul_ps(c6_00,rinvsix);
406 vvdw12 = _mm_mul_ps(c12_00,_mm_mul_ps(rinvsix,rinvsix));
407 vvdw = _mm_sub_ps( _mm_mul_ps(vvdw12,one_twelfth) , _mm_mul_ps(vvdw6,one_sixth) );
408 fvdw = _mm_mul_ps(_mm_sub_ps(vvdw12,vvdw6),rinvsq00);
410 /* Update potential sum for this i atom from the interaction with this j atom. */
411 velec = _mm_andnot_ps(dummy_mask,velec);
412 velecsum = _mm_add_ps(velecsum,velec);
413 vgb = _mm_andnot_ps(dummy_mask,vgb);
414 vgbsum = _mm_add_ps(vgbsum,vgb);
415 vvdw = _mm_andnot_ps(dummy_mask,vvdw);
416 vvdwsum = _mm_add_ps(vvdwsum,vvdw);
418 fscal = _mm_add_ps(felec,fvdw);
420 fscal = _mm_andnot_ps(dummy_mask,fscal);
422 /* Calculate temporary vectorial force */
423 tx = _mm_mul_ps(fscal,dx00);
424 ty = _mm_mul_ps(fscal,dy00);
425 tz = _mm_mul_ps(fscal,dz00);
427 /* Update vectorial force */
428 fix0 = _mm_add_ps(fix0,tx);
429 fiy0 = _mm_add_ps(fiy0,ty);
430 fiz0 = _mm_add_ps(fiz0,tz);
432 fjptrA = (jnrlistA>=0) ? f+j_coord_offsetA : scratch;
433 fjptrB = (jnrlistB>=0) ? f+j_coord_offsetB : scratch;
434 fjptrC = (jnrlistC>=0) ? f+j_coord_offsetC : scratch;
435 fjptrD = (jnrlistD>=0) ? f+j_coord_offsetD : scratch;
436 gmx_mm_decrement_1rvec_4ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,tx,ty,tz);
438 /* Inner loop uses 72 flops */
441 /* End of innermost loop */
443 gmx_mm_update_iforce_1atom_swizzle_ps(fix0,fiy0,fiz0,
444 f+i_coord_offset,fshift+i_shift_offset);
447 /* Update potential energies */
448 gmx_mm_update_1pot_ps(velecsum,kernel_data->energygrp_elec+ggid);
449 gmx_mm_update_1pot_ps(vgbsum,kernel_data->energygrp_polarization+ggid);
450 gmx_mm_update_1pot_ps(vvdwsum,kernel_data->energygrp_vdw+ggid);
451 dvdasum = _mm_mul_ps(dvdasum, _mm_mul_ps(isai0,isai0));
452 gmx_mm_update_1pot_ps(dvdasum,dvda+inr);
454 /* Increment number of inner iterations */
455 inneriter += j_index_end - j_index_start;
457 /* Outer loop uses 10 flops */
460 /* Increment number of outer iterations */
463 /* Update outer/inner flops */
465 inc_nrnb(nrnb,eNR_NBKERNEL_ELEC_VDW_VF,outeriter*10 + inneriter*72);
468 * Gromacs nonbonded kernel: nb_kernel_ElecGB_VdwLJ_GeomP1P1_F_sse4_1_single
469 * Electrostatics interaction: GeneralizedBorn
470 * VdW interaction: LennardJones
471 * Geometry: Particle-Particle
472 * Calculate force/pot: Force
475 nb_kernel_ElecGB_VdwLJ_GeomP1P1_F_sse4_1_single
476 (t_nblist * gmx_restrict nlist,
477 rvec * gmx_restrict xx,
478 rvec * gmx_restrict ff,
479 t_forcerec * gmx_restrict fr,
480 t_mdatoms * gmx_restrict mdatoms,
481 nb_kernel_data_t * gmx_restrict kernel_data,
482 t_nrnb * gmx_restrict nrnb)
484 /* Suffixes 0,1,2,3 refer to particle indices for waters in the inner or outer loop, or
485 * just 0 for non-waters.
486 * Suffixes A,B,C,D refer to j loop unrolling done with SSE, e.g. for the four different
487 * jnr indices corresponding to data put in the four positions in the SIMD register.
489 int i_shift_offset,i_coord_offset,outeriter,inneriter;
490 int j_index_start,j_index_end,jidx,nri,inr,ggid,iidx;
491 int jnrA,jnrB,jnrC,jnrD;
492 int jnrlistA,jnrlistB,jnrlistC,jnrlistD;
493 int j_coord_offsetA,j_coord_offsetB,j_coord_offsetC,j_coord_offsetD;
494 int *iinr,*jindex,*jjnr,*shiftidx,*gid;
496 real *shiftvec,*fshift,*x,*f;
497 real *fjptrA,*fjptrB,*fjptrC,*fjptrD;
499 __m128 tx,ty,tz,fscal,rcutoff,rcutoff2,jidxall;
501 __m128 ix0,iy0,iz0,fix0,fiy0,fiz0,iq0,isai0;
502 int vdwjidx0A,vdwjidx0B,vdwjidx0C,vdwjidx0D;
503 __m128 jx0,jy0,jz0,fjx0,fjy0,fjz0,jq0,isaj0;
504 __m128 dx00,dy00,dz00,rsq00,rinv00,rinvsq00,r00,qq00,c6_00,c12_00;
505 __m128 velec,felec,velecsum,facel,crf,krf,krf2;
508 __m128 vgb,fgb,vgbsum,dvdasum,gbscale,gbtabscale,isaprod,gbqqfactor,gbinvepsdiff,gbeps,dvdatmp;
509 __m128 minushalf = _mm_set1_ps(-0.5);
510 real *invsqrta,*dvda,*gbtab;
512 __m128 rinvsix,rvdw,vvdw,vvdw6,vvdw12,fvdw,fvdw6,fvdw12,vvdwsum,sh_vdw_invrcut6;
515 __m128 one_sixth = _mm_set1_ps(1.0/6.0);
516 __m128 one_twelfth = _mm_set1_ps(1.0/12.0);
518 __m128i ifour = _mm_set1_epi32(4);
519 __m128 rt,vfeps,vftabscale,Y,F,G,H,Heps,Fp,VV,FF;
521 __m128 dummy_mask,cutoff_mask;
522 __m128 signbit = _mm_castsi128_ps( _mm_set1_epi32(0x80000000) );
523 __m128 one = _mm_set1_ps(1.0);
524 __m128 two = _mm_set1_ps(2.0);
530 jindex = nlist->jindex;
532 shiftidx = nlist->shift;
534 shiftvec = fr->shift_vec[0];
535 fshift = fr->fshift[0];
536 facel = _mm_set1_ps(fr->epsfac);
537 charge = mdatoms->chargeA;
538 nvdwtype = fr->ntype;
540 vdwtype = mdatoms->typeA;
542 invsqrta = fr->invsqrta;
544 gbtabscale = _mm_set1_ps(fr->gbtab.scale);
545 gbtab = fr->gbtab.data;
546 gbinvepsdiff = _mm_set1_ps((1.0/fr->epsilon_r) - (1.0/fr->gb_epsilon_solvent));
548 /* Avoid stupid compiler warnings */
549 jnrA = jnrB = jnrC = jnrD = 0;
558 for(iidx=0;iidx<4*DIM;iidx++)
563 /* Start outer loop over neighborlists */
564 for(iidx=0; iidx<nri; iidx++)
566 /* Load shift vector for this list */
567 i_shift_offset = DIM*shiftidx[iidx];
569 /* Load limits for loop over neighbors */
570 j_index_start = jindex[iidx];
571 j_index_end = jindex[iidx+1];
573 /* Get outer coordinate index */
575 i_coord_offset = DIM*inr;
577 /* Load i particle coords and add shift vector */
578 gmx_mm_load_shift_and_1rvec_broadcast_ps(shiftvec+i_shift_offset,x+i_coord_offset,&ix0,&iy0,&iz0);
580 fix0 = _mm_setzero_ps();
581 fiy0 = _mm_setzero_ps();
582 fiz0 = _mm_setzero_ps();
584 /* Load parameters for i particles */
585 iq0 = _mm_mul_ps(facel,_mm_load1_ps(charge+inr+0));
586 isai0 = _mm_load1_ps(invsqrta+inr+0);
587 vdwioffset0 = 2*nvdwtype*vdwtype[inr+0];
589 dvdasum = _mm_setzero_ps();
591 /* Start inner kernel loop */
592 for(jidx=j_index_start; jidx<j_index_end && jjnr[jidx+3]>=0; jidx+=4)
595 /* Get j neighbor index, and coordinate index */
600 j_coord_offsetA = DIM*jnrA;
601 j_coord_offsetB = DIM*jnrB;
602 j_coord_offsetC = DIM*jnrC;
603 j_coord_offsetD = DIM*jnrD;
605 /* load j atom coordinates */
606 gmx_mm_load_1rvec_4ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB,
607 x+j_coord_offsetC,x+j_coord_offsetD,
610 /* Calculate displacement vector */
611 dx00 = _mm_sub_ps(ix0,jx0);
612 dy00 = _mm_sub_ps(iy0,jy0);
613 dz00 = _mm_sub_ps(iz0,jz0);
615 /* Calculate squared distance and things based on it */
616 rsq00 = gmx_mm_calc_rsq_ps(dx00,dy00,dz00);
618 rinv00 = gmx_mm_invsqrt_ps(rsq00);
620 rinvsq00 = _mm_mul_ps(rinv00,rinv00);
622 /* Load parameters for j particles */
623 jq0 = gmx_mm_load_4real_swizzle_ps(charge+jnrA+0,charge+jnrB+0,
624 charge+jnrC+0,charge+jnrD+0);
625 isaj0 = gmx_mm_load_4real_swizzle_ps(invsqrta+jnrA+0,invsqrta+jnrB+0,
626 invsqrta+jnrC+0,invsqrta+jnrD+0);
627 vdwjidx0A = 2*vdwtype[jnrA+0];
628 vdwjidx0B = 2*vdwtype[jnrB+0];
629 vdwjidx0C = 2*vdwtype[jnrC+0];
630 vdwjidx0D = 2*vdwtype[jnrD+0];
632 /**************************
633 * CALCULATE INTERACTIONS *
634 **************************/
636 r00 = _mm_mul_ps(rsq00,rinv00);
638 /* Compute parameters for interactions between i and j atoms */
639 qq00 = _mm_mul_ps(iq0,jq0);
640 gmx_mm_load_4pair_swizzle_ps(vdwparam+vdwioffset0+vdwjidx0A,
641 vdwparam+vdwioffset0+vdwjidx0B,
642 vdwparam+vdwioffset0+vdwjidx0C,
643 vdwparam+vdwioffset0+vdwjidx0D,
646 /* GENERALIZED BORN AND COULOMB ELECTROSTATICS */
647 isaprod = _mm_mul_ps(isai0,isaj0);
648 gbqqfactor = _mm_xor_ps(signbit,_mm_mul_ps(qq00,_mm_mul_ps(isaprod,gbinvepsdiff)));
649 gbscale = _mm_mul_ps(isaprod,gbtabscale);
651 /* Calculate generalized born table index - this is a separate table from the normal one,
652 * but we use the same procedure by multiplying r with scale and truncating to integer.
654 rt = _mm_mul_ps(r00,gbscale);
655 gbitab = _mm_cvttps_epi32(rt);
656 gbeps = _mm_sub_ps(rt,_mm_round_ps(rt, _MM_FROUND_FLOOR));
657 gbitab = _mm_slli_epi32(gbitab,2);
658 Y = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,0) );
659 F = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,1) );
660 G = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,2) );
661 H = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,3) );
662 _MM_TRANSPOSE4_PS(Y,F,G,H);
663 Heps = _mm_mul_ps(gbeps,H);
664 Fp = _mm_add_ps(F,_mm_mul_ps(gbeps,_mm_add_ps(G,Heps)));
665 VV = _mm_add_ps(Y,_mm_mul_ps(gbeps,Fp));
666 vgb = _mm_mul_ps(gbqqfactor,VV);
668 FF = _mm_add_ps(Fp,_mm_mul_ps(gbeps,_mm_add_ps(G,_mm_add_ps(Heps,Heps))));
669 fgb = _mm_mul_ps(gbqqfactor,_mm_mul_ps(FF,gbscale));
670 dvdatmp = _mm_mul_ps(minushalf,_mm_add_ps(vgb,_mm_mul_ps(fgb,r00)));
671 dvdasum = _mm_add_ps(dvdasum,dvdatmp);
676 gmx_mm_increment_4real_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,_mm_mul_ps(dvdatmp,_mm_mul_ps(isaj0,isaj0)));
677 velec = _mm_mul_ps(qq00,rinv00);
678 felec = _mm_mul_ps(_mm_sub_ps(_mm_mul_ps(velec,rinv00),fgb),rinv00);
680 /* LENNARD-JONES DISPERSION/REPULSION */
682 rinvsix = _mm_mul_ps(_mm_mul_ps(rinvsq00,rinvsq00),rinvsq00);
683 fvdw = _mm_mul_ps(_mm_sub_ps(_mm_mul_ps(c12_00,rinvsix),c6_00),_mm_mul_ps(rinvsix,rinvsq00));
685 fscal = _mm_add_ps(felec,fvdw);
687 /* Calculate temporary vectorial force */
688 tx = _mm_mul_ps(fscal,dx00);
689 ty = _mm_mul_ps(fscal,dy00);
690 tz = _mm_mul_ps(fscal,dz00);
692 /* Update vectorial force */
693 fix0 = _mm_add_ps(fix0,tx);
694 fiy0 = _mm_add_ps(fiy0,ty);
695 fiz0 = _mm_add_ps(fiz0,tz);
697 fjptrA = f+j_coord_offsetA;
698 fjptrB = f+j_coord_offsetB;
699 fjptrC = f+j_coord_offsetC;
700 fjptrD = f+j_coord_offsetD;
701 gmx_mm_decrement_1rvec_4ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,tx,ty,tz);
703 /* Inner loop uses 64 flops */
709 /* Get j neighbor index, and coordinate index */
710 jnrlistA = jjnr[jidx];
711 jnrlistB = jjnr[jidx+1];
712 jnrlistC = jjnr[jidx+2];
713 jnrlistD = jjnr[jidx+3];
714 /* Sign of each element will be negative for non-real atoms.
715 * This mask will be 0xFFFFFFFF for dummy entries and 0x0 for real ones,
716 * so use it as val = _mm_andnot_ps(mask,val) to clear dummy entries.
718 dummy_mask = gmx_mm_castsi128_ps(_mm_cmplt_epi32(_mm_loadu_si128((const __m128i *)(jjnr+jidx)),_mm_setzero_si128()));
719 jnrA = (jnrlistA>=0) ? jnrlistA : 0;
720 jnrB = (jnrlistB>=0) ? jnrlistB : 0;
721 jnrC = (jnrlistC>=0) ? jnrlistC : 0;
722 jnrD = (jnrlistD>=0) ? jnrlistD : 0;
723 j_coord_offsetA = DIM*jnrA;
724 j_coord_offsetB = DIM*jnrB;
725 j_coord_offsetC = DIM*jnrC;
726 j_coord_offsetD = DIM*jnrD;
728 /* load j atom coordinates */
729 gmx_mm_load_1rvec_4ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB,
730 x+j_coord_offsetC,x+j_coord_offsetD,
733 /* Calculate displacement vector */
734 dx00 = _mm_sub_ps(ix0,jx0);
735 dy00 = _mm_sub_ps(iy0,jy0);
736 dz00 = _mm_sub_ps(iz0,jz0);
738 /* Calculate squared distance and things based on it */
739 rsq00 = gmx_mm_calc_rsq_ps(dx00,dy00,dz00);
741 rinv00 = gmx_mm_invsqrt_ps(rsq00);
743 rinvsq00 = _mm_mul_ps(rinv00,rinv00);
745 /* Load parameters for j particles */
746 jq0 = gmx_mm_load_4real_swizzle_ps(charge+jnrA+0,charge+jnrB+0,
747 charge+jnrC+0,charge+jnrD+0);
748 isaj0 = gmx_mm_load_4real_swizzle_ps(invsqrta+jnrA+0,invsqrta+jnrB+0,
749 invsqrta+jnrC+0,invsqrta+jnrD+0);
750 vdwjidx0A = 2*vdwtype[jnrA+0];
751 vdwjidx0B = 2*vdwtype[jnrB+0];
752 vdwjidx0C = 2*vdwtype[jnrC+0];
753 vdwjidx0D = 2*vdwtype[jnrD+0];
755 /**************************
756 * CALCULATE INTERACTIONS *
757 **************************/
759 r00 = _mm_mul_ps(rsq00,rinv00);
760 r00 = _mm_andnot_ps(dummy_mask,r00);
762 /* Compute parameters for interactions between i and j atoms */
763 qq00 = _mm_mul_ps(iq0,jq0);
764 gmx_mm_load_4pair_swizzle_ps(vdwparam+vdwioffset0+vdwjidx0A,
765 vdwparam+vdwioffset0+vdwjidx0B,
766 vdwparam+vdwioffset0+vdwjidx0C,
767 vdwparam+vdwioffset0+vdwjidx0D,
770 /* GENERALIZED BORN AND COULOMB ELECTROSTATICS */
771 isaprod = _mm_mul_ps(isai0,isaj0);
772 gbqqfactor = _mm_xor_ps(signbit,_mm_mul_ps(qq00,_mm_mul_ps(isaprod,gbinvepsdiff)));
773 gbscale = _mm_mul_ps(isaprod,gbtabscale);
775 /* Calculate generalized born table index - this is a separate table from the normal one,
776 * but we use the same procedure by multiplying r with scale and truncating to integer.
778 rt = _mm_mul_ps(r00,gbscale);
779 gbitab = _mm_cvttps_epi32(rt);
780 gbeps = _mm_sub_ps(rt,_mm_round_ps(rt, _MM_FROUND_FLOOR));
781 gbitab = _mm_slli_epi32(gbitab,2);
782 Y = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,0) );
783 F = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,1) );
784 G = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,2) );
785 H = _mm_load_ps( gbtab + gmx_mm_extract_epi32(gbitab,3) );
786 _MM_TRANSPOSE4_PS(Y,F,G,H);
787 Heps = _mm_mul_ps(gbeps,H);
788 Fp = _mm_add_ps(F,_mm_mul_ps(gbeps,_mm_add_ps(G,Heps)));
789 VV = _mm_add_ps(Y,_mm_mul_ps(gbeps,Fp));
790 vgb = _mm_mul_ps(gbqqfactor,VV);
792 FF = _mm_add_ps(Fp,_mm_mul_ps(gbeps,_mm_add_ps(G,_mm_add_ps(Heps,Heps))));
793 fgb = _mm_mul_ps(gbqqfactor,_mm_mul_ps(FF,gbscale));
794 dvdatmp = _mm_mul_ps(minushalf,_mm_add_ps(vgb,_mm_mul_ps(fgb,r00)));
795 dvdasum = _mm_add_ps(dvdasum,dvdatmp);
796 /* The pointers to scratch make sure that this code with compilers that take gmx_restrict seriously (e.g. icc 13) really can't screw things up. */
797 fjptrA = (jnrlistA>=0) ? dvda+jnrA : scratch;
798 fjptrB = (jnrlistB>=0) ? dvda+jnrB : scratch;
799 fjptrC = (jnrlistC>=0) ? dvda+jnrC : scratch;
800 fjptrD = (jnrlistD>=0) ? dvda+jnrD : scratch;
801 gmx_mm_increment_4real_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,_mm_mul_ps(dvdatmp,_mm_mul_ps(isaj0,isaj0)));
802 velec = _mm_mul_ps(qq00,rinv00);
803 felec = _mm_mul_ps(_mm_sub_ps(_mm_mul_ps(velec,rinv00),fgb),rinv00);
805 /* LENNARD-JONES DISPERSION/REPULSION */
807 rinvsix = _mm_mul_ps(_mm_mul_ps(rinvsq00,rinvsq00),rinvsq00);
808 fvdw = _mm_mul_ps(_mm_sub_ps(_mm_mul_ps(c12_00,rinvsix),c6_00),_mm_mul_ps(rinvsix,rinvsq00));
810 fscal = _mm_add_ps(felec,fvdw);
812 fscal = _mm_andnot_ps(dummy_mask,fscal);
814 /* Calculate temporary vectorial force */
815 tx = _mm_mul_ps(fscal,dx00);
816 ty = _mm_mul_ps(fscal,dy00);
817 tz = _mm_mul_ps(fscal,dz00);
819 /* Update vectorial force */
820 fix0 = _mm_add_ps(fix0,tx);
821 fiy0 = _mm_add_ps(fiy0,ty);
822 fiz0 = _mm_add_ps(fiz0,tz);
824 fjptrA = (jnrlistA>=0) ? f+j_coord_offsetA : scratch;
825 fjptrB = (jnrlistB>=0) ? f+j_coord_offsetB : scratch;
826 fjptrC = (jnrlistC>=0) ? f+j_coord_offsetC : scratch;
827 fjptrD = (jnrlistD>=0) ? f+j_coord_offsetD : scratch;
828 gmx_mm_decrement_1rvec_4ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,tx,ty,tz);
830 /* Inner loop uses 65 flops */
833 /* End of innermost loop */
835 gmx_mm_update_iforce_1atom_swizzle_ps(fix0,fiy0,fiz0,
836 f+i_coord_offset,fshift+i_shift_offset);
838 dvdasum = _mm_mul_ps(dvdasum, _mm_mul_ps(isai0,isai0));
839 gmx_mm_update_1pot_ps(dvdasum,dvda+inr);
841 /* Increment number of inner iterations */
842 inneriter += j_index_end - j_index_start;
844 /* Outer loop uses 7 flops */
847 /* Increment number of outer iterations */
850 /* Update outer/inner flops */
852 inc_nrnb(nrnb,eNR_NBKERNEL_ELEC_VDW_F,outeriter*7 + inneriter*65);