2 * Note: this file was generated by the Gromacs avx_256_single kernel generator.
4 * This source code is part of
8 * Copyright (c) 2001-2012, The GROMACS Development Team
10 * Gromacs is a library for molecular simulation and trajectory analysis,
11 * written by Erik Lindahl, David van der Spoel, Berk Hess, and others - for
12 * a full list of developers and information, check out http://www.gromacs.org
14 * This program is free software; you can redistribute it and/or modify it under
15 * the terms of the GNU Lesser General Public License as published by the Free
16 * Software Foundation; either version 2 of the License, or (at your option) any
19 * To help fund GROMACS development, we humbly ask that you cite
20 * the papers people have written on it - you can find them on the website.
28 #include "../nb_kernel.h"
29 #include "types/simple.h"
33 #include "gmx_math_x86_avx_256_single.h"
34 #include "kernelutil_x86_avx_256_single.h"
37 * Gromacs nonbonded kernel: nb_kernel_ElecGB_VdwLJ_GeomP1P1_VF_avx_256_single
38 * Electrostatics interaction: GeneralizedBorn
39 * VdW interaction: LennardJones
40 * Geometry: Particle-Particle
41 * Calculate force/pot: PotentialAndForce
44 nb_kernel_ElecGB_VdwLJ_GeomP1P1_VF_avx_256_single
45 (t_nblist * gmx_restrict nlist,
46 rvec * gmx_restrict xx,
47 rvec * gmx_restrict ff,
48 t_forcerec * gmx_restrict fr,
49 t_mdatoms * gmx_restrict mdatoms,
50 nb_kernel_data_t * gmx_restrict kernel_data,
51 t_nrnb * gmx_restrict nrnb)
53 /* Suffixes 0,1,2,3 refer to particle indices for waters in the inner or outer loop, or
54 * just 0 for non-waters.
55 * Suffixes A,B,C,D,E,F,G,H refer to j loop unrolling done with AVX, e.g. for the eight different
56 * jnr indices corresponding to data put in the four positions in the SIMD register.
58 int i_shift_offset,i_coord_offset,outeriter,inneriter;
59 int j_index_start,j_index_end,jidx,nri,inr,ggid,iidx;
60 int jnrA,jnrB,jnrC,jnrD;
61 int jnrE,jnrF,jnrG,jnrH;
62 int jnrlistA,jnrlistB,jnrlistC,jnrlistD;
63 int jnrlistE,jnrlistF,jnrlistG,jnrlistH;
64 int j_coord_offsetA,j_coord_offsetB,j_coord_offsetC,j_coord_offsetD;
65 int j_coord_offsetE,j_coord_offsetF,j_coord_offsetG,j_coord_offsetH;
66 int *iinr,*jindex,*jjnr,*shiftidx,*gid;
68 real *shiftvec,*fshift,*x,*f;
69 real *fjptrA,*fjptrB,*fjptrC,*fjptrD,*fjptrE,*fjptrF,*fjptrG,*fjptrH;
71 __m256 tx,ty,tz,fscal,rcutoff,rcutoff2,jidxall;
72 real * vdwioffsetptr0;
73 __m256 ix0,iy0,iz0,fix0,fiy0,fiz0,iq0,isai0;
74 int vdwjidx0A,vdwjidx0B,vdwjidx0C,vdwjidx0D,vdwjidx0E,vdwjidx0F,vdwjidx0G,vdwjidx0H;
75 __m256 jx0,jy0,jz0,fjx0,fjy0,fjz0,jq0,isaj0;
76 __m256 dx00,dy00,dz00,rsq00,rinv00,rinvsq00,r00,qq00,c6_00,c12_00;
77 __m256 velec,felec,velecsum,facel,crf,krf,krf2;
80 __m128i gbitab_lo,gbitab_hi;
81 __m256 vgb,fgb,vgbsum,dvdasum,gbscale,gbtabscale,isaprod,gbqqfactor,gbinvepsdiff,gbeps,dvdatmp;
82 __m256 minushalf = _mm256_set1_ps(-0.5);
83 real *invsqrta,*dvda,*gbtab;
85 __m256 rinvsix,rvdw,vvdw,vvdw6,vvdw12,fvdw,fvdw6,fvdw12,vvdwsum,sh_vdw_invrcut6;
88 __m256 one_sixth = _mm256_set1_ps(1.0/6.0);
89 __m256 one_twelfth = _mm256_set1_ps(1.0/12.0);
91 __m128i vfitab_lo,vfitab_hi;
92 __m128i ifour = _mm_set1_epi32(4);
93 __m256 rt,vfeps,vftabscale,Y,F,G,H,Heps,Fp,VV,FF;
95 __m256 dummy_mask,cutoff_mask;
96 __m256 signbit = _mm256_castsi256_ps( _mm256_set1_epi32(0x80000000) );
97 __m256 one = _mm256_set1_ps(1.0);
98 __m256 two = _mm256_set1_ps(2.0);
104 jindex = nlist->jindex;
106 shiftidx = nlist->shift;
108 shiftvec = fr->shift_vec[0];
109 fshift = fr->fshift[0];
110 facel = _mm256_set1_ps(fr->epsfac);
111 charge = mdatoms->chargeA;
112 nvdwtype = fr->ntype;
114 vdwtype = mdatoms->typeA;
116 invsqrta = fr->invsqrta;
118 gbtabscale = _mm256_set1_ps(fr->gbtab.scale);
119 gbtab = fr->gbtab.data;
120 gbinvepsdiff = _mm256_set1_ps((1.0/fr->epsilon_r) - (1.0/fr->gb_epsilon_solvent));
122 /* Avoid stupid compiler warnings */
123 jnrA = jnrB = jnrC = jnrD = jnrE = jnrF = jnrG = jnrH = 0;
136 for(iidx=0;iidx<4*DIM;iidx++)
141 /* Start outer loop over neighborlists */
142 for(iidx=0; iidx<nri; iidx++)
144 /* Load shift vector for this list */
145 i_shift_offset = DIM*shiftidx[iidx];
147 /* Load limits for loop over neighbors */
148 j_index_start = jindex[iidx];
149 j_index_end = jindex[iidx+1];
151 /* Get outer coordinate index */
153 i_coord_offset = DIM*inr;
155 /* Load i particle coords and add shift vector */
156 gmx_mm256_load_shift_and_1rvec_broadcast_ps(shiftvec+i_shift_offset,x+i_coord_offset,&ix0,&iy0,&iz0);
158 fix0 = _mm256_setzero_ps();
159 fiy0 = _mm256_setzero_ps();
160 fiz0 = _mm256_setzero_ps();
162 /* Load parameters for i particles */
163 iq0 = _mm256_mul_ps(facel,_mm256_set1_ps(charge[inr+0]));
164 isai0 = _mm256_set1_ps(invsqrta[inr+0]);
165 vdwioffsetptr0 = vdwparam+2*nvdwtype*vdwtype[inr+0];
167 /* Reset potential sums */
168 velecsum = _mm256_setzero_ps();
169 vgbsum = _mm256_setzero_ps();
170 vvdwsum = _mm256_setzero_ps();
171 dvdasum = _mm256_setzero_ps();
173 /* Start inner kernel loop */
174 for(jidx=j_index_start; jidx<j_index_end && jjnr[jidx+7]>=0; jidx+=8)
177 /* Get j neighbor index, and coordinate index */
186 j_coord_offsetA = DIM*jnrA;
187 j_coord_offsetB = DIM*jnrB;
188 j_coord_offsetC = DIM*jnrC;
189 j_coord_offsetD = DIM*jnrD;
190 j_coord_offsetE = DIM*jnrE;
191 j_coord_offsetF = DIM*jnrF;
192 j_coord_offsetG = DIM*jnrG;
193 j_coord_offsetH = DIM*jnrH;
195 /* load j atom coordinates */
196 gmx_mm256_load_1rvec_8ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB,
197 x+j_coord_offsetC,x+j_coord_offsetD,
198 x+j_coord_offsetE,x+j_coord_offsetF,
199 x+j_coord_offsetG,x+j_coord_offsetH,
202 /* Calculate displacement vector */
203 dx00 = _mm256_sub_ps(ix0,jx0);
204 dy00 = _mm256_sub_ps(iy0,jy0);
205 dz00 = _mm256_sub_ps(iz0,jz0);
207 /* Calculate squared distance and things based on it */
208 rsq00 = gmx_mm256_calc_rsq_ps(dx00,dy00,dz00);
210 rinv00 = gmx_mm256_invsqrt_ps(rsq00);
212 rinvsq00 = _mm256_mul_ps(rinv00,rinv00);
214 /* Load parameters for j particles */
215 jq0 = gmx_mm256_load_8real_swizzle_ps(charge+jnrA+0,charge+jnrB+0,
216 charge+jnrC+0,charge+jnrD+0,
217 charge+jnrE+0,charge+jnrF+0,
218 charge+jnrG+0,charge+jnrH+0);
219 isaj0 = gmx_mm256_load_8real_swizzle_ps(invsqrta+jnrA+0,invsqrta+jnrB+0,
220 invsqrta+jnrC+0,invsqrta+jnrD+0,
221 invsqrta+jnrE+0,invsqrta+jnrF+0,
222 invsqrta+jnrG+0,invsqrta+jnrH+0);
223 vdwjidx0A = 2*vdwtype[jnrA+0];
224 vdwjidx0B = 2*vdwtype[jnrB+0];
225 vdwjidx0C = 2*vdwtype[jnrC+0];
226 vdwjidx0D = 2*vdwtype[jnrD+0];
227 vdwjidx0E = 2*vdwtype[jnrE+0];
228 vdwjidx0F = 2*vdwtype[jnrF+0];
229 vdwjidx0G = 2*vdwtype[jnrG+0];
230 vdwjidx0H = 2*vdwtype[jnrH+0];
232 /**************************
233 * CALCULATE INTERACTIONS *
234 **************************/
236 r00 = _mm256_mul_ps(rsq00,rinv00);
238 /* Compute parameters for interactions between i and j atoms */
239 qq00 = _mm256_mul_ps(iq0,jq0);
240 gmx_mm256_load_8pair_swizzle_ps(vdwioffsetptr0+vdwjidx0A,
241 vdwioffsetptr0+vdwjidx0B,
242 vdwioffsetptr0+vdwjidx0C,
243 vdwioffsetptr0+vdwjidx0D,
244 vdwioffsetptr0+vdwjidx0E,
245 vdwioffsetptr0+vdwjidx0F,
246 vdwioffsetptr0+vdwjidx0G,
247 vdwioffsetptr0+vdwjidx0H,
250 /* GENERALIZED BORN AND COULOMB ELECTROSTATICS */
251 isaprod = _mm256_mul_ps(isai0,isaj0);
252 gbqqfactor = _mm256_xor_ps(signbit,_mm256_mul_ps(qq00,_mm256_mul_ps(isaprod,gbinvepsdiff)));
253 gbscale = _mm256_mul_ps(isaprod,gbtabscale);
255 /* Calculate generalized born table index - this is a separate table from the normal one,
256 * but we use the same procedure by multiplying r with scale and truncating to integer.
258 rt = _mm256_mul_ps(r00,gbscale);
259 gbitab = _mm256_cvttps_epi32(rt);
260 gbeps = _mm256_sub_ps(rt,_mm256_round_ps(rt, _MM_FROUND_FLOOR));
261 /* AVX1 does not support 256-bit integer operations, so now we go to 128-bit mode... */
262 gbitab_lo = _mm256_extractf128_si256(gbitab,0x0);
263 gbitab_hi = _mm256_extractf128_si256(gbitab,0x1);
264 gbitab_lo = _mm_slli_epi32(gbitab_lo,2);
265 gbitab_hi = _mm_slli_epi32(gbitab_hi,2);
266 Y = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,0)),
267 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,0)));
268 F = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,1)),
269 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,1)));
270 G = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,2)),
271 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,2)));
272 H = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,3)),
273 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,3)));
274 GMX_MM256_HALFTRANSPOSE4_PS(Y,F,G,H);
275 Heps = _mm256_mul_ps(gbeps,H);
276 Fp = _mm256_add_ps(F,_mm256_mul_ps(gbeps,_mm256_add_ps(G,Heps)));
277 VV = _mm256_add_ps(Y,_mm256_mul_ps(gbeps,Fp));
278 vgb = _mm256_mul_ps(gbqqfactor,VV);
280 FF = _mm256_add_ps(Fp,_mm256_mul_ps(gbeps,_mm256_add_ps(G,_mm256_add_ps(Heps,Heps))));
281 fgb = _mm256_mul_ps(gbqqfactor,_mm256_mul_ps(FF,gbscale));
282 dvdatmp = _mm256_mul_ps(minushalf,_mm256_add_ps(vgb,_mm256_mul_ps(fgb,r00)));
283 dvdasum = _mm256_add_ps(dvdasum,dvdatmp);
292 gmx_mm256_increment_8real_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,fjptrE,fjptrF,fjptrG,fjptrH,
293 _mm256_mul_ps(dvdatmp,_mm256_mul_ps(isaj0,isaj0)));
294 velec = _mm256_mul_ps(qq00,rinv00);
295 felec = _mm256_mul_ps(_mm256_sub_ps(_mm256_mul_ps(velec,rinv00),fgb),rinv00);
297 /* LENNARD-JONES DISPERSION/REPULSION */
299 rinvsix = _mm256_mul_ps(_mm256_mul_ps(rinvsq00,rinvsq00),rinvsq00);
300 vvdw6 = _mm256_mul_ps(c6_00,rinvsix);
301 vvdw12 = _mm256_mul_ps(c12_00,_mm256_mul_ps(rinvsix,rinvsix));
302 vvdw = _mm256_sub_ps( _mm256_mul_ps(vvdw12,one_twelfth) , _mm256_mul_ps(vvdw6,one_sixth) );
303 fvdw = _mm256_mul_ps(_mm256_sub_ps(vvdw12,vvdw6),rinvsq00);
305 /* Update potential sum for this i atom from the interaction with this j atom. */
306 velecsum = _mm256_add_ps(velecsum,velec);
307 vgbsum = _mm256_add_ps(vgbsum,vgb);
308 vvdwsum = _mm256_add_ps(vvdwsum,vvdw);
310 fscal = _mm256_add_ps(felec,fvdw);
312 /* Calculate temporary vectorial force */
313 tx = _mm256_mul_ps(fscal,dx00);
314 ty = _mm256_mul_ps(fscal,dy00);
315 tz = _mm256_mul_ps(fscal,dz00);
317 /* Update vectorial force */
318 fix0 = _mm256_add_ps(fix0,tx);
319 fiy0 = _mm256_add_ps(fiy0,ty);
320 fiz0 = _mm256_add_ps(fiz0,tz);
322 fjptrA = f+j_coord_offsetA;
323 fjptrB = f+j_coord_offsetB;
324 fjptrC = f+j_coord_offsetC;
325 fjptrD = f+j_coord_offsetD;
326 fjptrE = f+j_coord_offsetE;
327 fjptrF = f+j_coord_offsetF;
328 fjptrG = f+j_coord_offsetG;
329 fjptrH = f+j_coord_offsetH;
330 gmx_mm256_decrement_1rvec_8ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,fjptrE,fjptrF,fjptrG,fjptrH,tx,ty,tz);
332 /* Inner loop uses 70 flops */
338 /* Get j neighbor index, and coordinate index */
339 jnrlistA = jjnr[jidx];
340 jnrlistB = jjnr[jidx+1];
341 jnrlistC = jjnr[jidx+2];
342 jnrlistD = jjnr[jidx+3];
343 jnrlistE = jjnr[jidx+4];
344 jnrlistF = jjnr[jidx+5];
345 jnrlistG = jjnr[jidx+6];
346 jnrlistH = jjnr[jidx+7];
347 /* Sign of each element will be negative for non-real atoms.
348 * This mask will be 0xFFFFFFFF for dummy entries and 0x0 for real ones,
349 * so use it as val = _mm_andnot_ps(mask,val) to clear dummy entries.
351 dummy_mask = gmx_mm256_set_m128(gmx_mm_castsi128_ps(_mm_cmplt_epi32(_mm_loadu_si128((const __m128i *)(jjnr+jidx+4)),_mm_setzero_si128())),
352 gmx_mm_castsi128_ps(_mm_cmplt_epi32(_mm_loadu_si128((const __m128i *)(jjnr+jidx)),_mm_setzero_si128())));
354 jnrA = (jnrlistA>=0) ? jnrlistA : 0;
355 jnrB = (jnrlistB>=0) ? jnrlistB : 0;
356 jnrC = (jnrlistC>=0) ? jnrlistC : 0;
357 jnrD = (jnrlistD>=0) ? jnrlistD : 0;
358 jnrE = (jnrlistE>=0) ? jnrlistE : 0;
359 jnrF = (jnrlistF>=0) ? jnrlistF : 0;
360 jnrG = (jnrlistG>=0) ? jnrlistG : 0;
361 jnrH = (jnrlistH>=0) ? jnrlistH : 0;
362 j_coord_offsetA = DIM*jnrA;
363 j_coord_offsetB = DIM*jnrB;
364 j_coord_offsetC = DIM*jnrC;
365 j_coord_offsetD = DIM*jnrD;
366 j_coord_offsetE = DIM*jnrE;
367 j_coord_offsetF = DIM*jnrF;
368 j_coord_offsetG = DIM*jnrG;
369 j_coord_offsetH = DIM*jnrH;
371 /* load j atom coordinates */
372 gmx_mm256_load_1rvec_8ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB,
373 x+j_coord_offsetC,x+j_coord_offsetD,
374 x+j_coord_offsetE,x+j_coord_offsetF,
375 x+j_coord_offsetG,x+j_coord_offsetH,
378 /* Calculate displacement vector */
379 dx00 = _mm256_sub_ps(ix0,jx0);
380 dy00 = _mm256_sub_ps(iy0,jy0);
381 dz00 = _mm256_sub_ps(iz0,jz0);
383 /* Calculate squared distance and things based on it */
384 rsq00 = gmx_mm256_calc_rsq_ps(dx00,dy00,dz00);
386 rinv00 = gmx_mm256_invsqrt_ps(rsq00);
388 rinvsq00 = _mm256_mul_ps(rinv00,rinv00);
390 /* Load parameters for j particles */
391 jq0 = gmx_mm256_load_8real_swizzle_ps(charge+jnrA+0,charge+jnrB+0,
392 charge+jnrC+0,charge+jnrD+0,
393 charge+jnrE+0,charge+jnrF+0,
394 charge+jnrG+0,charge+jnrH+0);
395 isaj0 = gmx_mm256_load_8real_swizzle_ps(invsqrta+jnrA+0,invsqrta+jnrB+0,
396 invsqrta+jnrC+0,invsqrta+jnrD+0,
397 invsqrta+jnrE+0,invsqrta+jnrF+0,
398 invsqrta+jnrG+0,invsqrta+jnrH+0);
399 vdwjidx0A = 2*vdwtype[jnrA+0];
400 vdwjidx0B = 2*vdwtype[jnrB+0];
401 vdwjidx0C = 2*vdwtype[jnrC+0];
402 vdwjidx0D = 2*vdwtype[jnrD+0];
403 vdwjidx0E = 2*vdwtype[jnrE+0];
404 vdwjidx0F = 2*vdwtype[jnrF+0];
405 vdwjidx0G = 2*vdwtype[jnrG+0];
406 vdwjidx0H = 2*vdwtype[jnrH+0];
408 /**************************
409 * CALCULATE INTERACTIONS *
410 **************************/
412 r00 = _mm256_mul_ps(rsq00,rinv00);
413 r00 = _mm256_andnot_ps(dummy_mask,r00);
415 /* Compute parameters for interactions between i and j atoms */
416 qq00 = _mm256_mul_ps(iq0,jq0);
417 gmx_mm256_load_8pair_swizzle_ps(vdwioffsetptr0+vdwjidx0A,
418 vdwioffsetptr0+vdwjidx0B,
419 vdwioffsetptr0+vdwjidx0C,
420 vdwioffsetptr0+vdwjidx0D,
421 vdwioffsetptr0+vdwjidx0E,
422 vdwioffsetptr0+vdwjidx0F,
423 vdwioffsetptr0+vdwjidx0G,
424 vdwioffsetptr0+vdwjidx0H,
427 /* GENERALIZED BORN AND COULOMB ELECTROSTATICS */
428 isaprod = _mm256_mul_ps(isai0,isaj0);
429 gbqqfactor = _mm256_xor_ps(signbit,_mm256_mul_ps(qq00,_mm256_mul_ps(isaprod,gbinvepsdiff)));
430 gbscale = _mm256_mul_ps(isaprod,gbtabscale);
432 /* Calculate generalized born table index - this is a separate table from the normal one,
433 * but we use the same procedure by multiplying r with scale and truncating to integer.
435 rt = _mm256_mul_ps(r00,gbscale);
436 gbitab = _mm256_cvttps_epi32(rt);
437 gbeps = _mm256_sub_ps(rt,_mm256_round_ps(rt, _MM_FROUND_FLOOR));
438 /* AVX1 does not support 256-bit integer operations, so now we go to 128-bit mode... */
439 gbitab_lo = _mm256_extractf128_si256(gbitab,0x0);
440 gbitab_hi = _mm256_extractf128_si256(gbitab,0x1);
441 gbitab_lo = _mm_slli_epi32(gbitab_lo,2);
442 gbitab_hi = _mm_slli_epi32(gbitab_hi,2);
443 Y = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,0)),
444 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,0)));
445 F = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,1)),
446 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,1)));
447 G = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,2)),
448 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,2)));
449 H = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,3)),
450 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,3)));
451 GMX_MM256_HALFTRANSPOSE4_PS(Y,F,G,H);
452 Heps = _mm256_mul_ps(gbeps,H);
453 Fp = _mm256_add_ps(F,_mm256_mul_ps(gbeps,_mm256_add_ps(G,Heps)));
454 VV = _mm256_add_ps(Y,_mm256_mul_ps(gbeps,Fp));
455 vgb = _mm256_mul_ps(gbqqfactor,VV);
457 FF = _mm256_add_ps(Fp,_mm256_mul_ps(gbeps,_mm256_add_ps(G,_mm256_add_ps(Heps,Heps))));
458 fgb = _mm256_mul_ps(gbqqfactor,_mm256_mul_ps(FF,gbscale));
459 dvdatmp = _mm256_mul_ps(minushalf,_mm256_add_ps(vgb,_mm256_mul_ps(fgb,r00)));
460 dvdasum = _mm256_add_ps(dvdasum,dvdatmp);
461 /* 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. */
462 fjptrA = (jnrlistA>=0) ? dvda+jnrA : scratch;
463 fjptrB = (jnrlistB>=0) ? dvda+jnrB : scratch;
464 fjptrC = (jnrlistC>=0) ? dvda+jnrC : scratch;
465 fjptrD = (jnrlistD>=0) ? dvda+jnrD : scratch;
466 fjptrE = (jnrlistE>=0) ? dvda+jnrE : scratch;
467 fjptrF = (jnrlistF>=0) ? dvda+jnrF : scratch;
468 fjptrG = (jnrlistG>=0) ? dvda+jnrG : scratch;
469 fjptrH = (jnrlistH>=0) ? dvda+jnrH : scratch;
470 gmx_mm256_increment_8real_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,fjptrE,fjptrF,fjptrG,fjptrH,
471 _mm256_mul_ps(dvdatmp,_mm256_mul_ps(isaj0,isaj0)));
472 velec = _mm256_mul_ps(qq00,rinv00);
473 felec = _mm256_mul_ps(_mm256_sub_ps(_mm256_mul_ps(velec,rinv00),fgb),rinv00);
475 /* LENNARD-JONES DISPERSION/REPULSION */
477 rinvsix = _mm256_mul_ps(_mm256_mul_ps(rinvsq00,rinvsq00),rinvsq00);
478 vvdw6 = _mm256_mul_ps(c6_00,rinvsix);
479 vvdw12 = _mm256_mul_ps(c12_00,_mm256_mul_ps(rinvsix,rinvsix));
480 vvdw = _mm256_sub_ps( _mm256_mul_ps(vvdw12,one_twelfth) , _mm256_mul_ps(vvdw6,one_sixth) );
481 fvdw = _mm256_mul_ps(_mm256_sub_ps(vvdw12,vvdw6),rinvsq00);
483 /* Update potential sum for this i atom from the interaction with this j atom. */
484 velec = _mm256_andnot_ps(dummy_mask,velec);
485 velecsum = _mm256_add_ps(velecsum,velec);
486 vgb = _mm256_andnot_ps(dummy_mask,vgb);
487 vgbsum = _mm256_add_ps(vgbsum,vgb);
488 vvdw = _mm256_andnot_ps(dummy_mask,vvdw);
489 vvdwsum = _mm256_add_ps(vvdwsum,vvdw);
491 fscal = _mm256_add_ps(felec,fvdw);
493 fscal = _mm256_andnot_ps(dummy_mask,fscal);
495 /* Calculate temporary vectorial force */
496 tx = _mm256_mul_ps(fscal,dx00);
497 ty = _mm256_mul_ps(fscal,dy00);
498 tz = _mm256_mul_ps(fscal,dz00);
500 /* Update vectorial force */
501 fix0 = _mm256_add_ps(fix0,tx);
502 fiy0 = _mm256_add_ps(fiy0,ty);
503 fiz0 = _mm256_add_ps(fiz0,tz);
505 fjptrA = (jnrlistA>=0) ? f+j_coord_offsetA : scratch;
506 fjptrB = (jnrlistB>=0) ? f+j_coord_offsetB : scratch;
507 fjptrC = (jnrlistC>=0) ? f+j_coord_offsetC : scratch;
508 fjptrD = (jnrlistD>=0) ? f+j_coord_offsetD : scratch;
509 fjptrE = (jnrlistE>=0) ? f+j_coord_offsetE : scratch;
510 fjptrF = (jnrlistF>=0) ? f+j_coord_offsetF : scratch;
511 fjptrG = (jnrlistG>=0) ? f+j_coord_offsetG : scratch;
512 fjptrH = (jnrlistH>=0) ? f+j_coord_offsetH : scratch;
513 gmx_mm256_decrement_1rvec_8ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,fjptrE,fjptrF,fjptrG,fjptrH,tx,ty,tz);
515 /* Inner loop uses 71 flops */
518 /* End of innermost loop */
520 gmx_mm256_update_iforce_1atom_swizzle_ps(fix0,fiy0,fiz0,
521 f+i_coord_offset,fshift+i_shift_offset);
524 /* Update potential energies */
525 gmx_mm256_update_1pot_ps(velecsum,kernel_data->energygrp_elec+ggid);
526 gmx_mm256_update_1pot_ps(vgbsum,kernel_data->energygrp_polarization+ggid);
527 gmx_mm256_update_1pot_ps(vvdwsum,kernel_data->energygrp_vdw+ggid);
528 dvdasum = _mm256_mul_ps(dvdasum, _mm256_mul_ps(isai0,isai0));
529 gmx_mm256_update_1pot_ps(dvdasum,dvda+inr);
531 /* Increment number of inner iterations */
532 inneriter += j_index_end - j_index_start;
534 /* Outer loop uses 10 flops */
537 /* Increment number of outer iterations */
540 /* Update outer/inner flops */
542 inc_nrnb(nrnb,eNR_NBKERNEL_ELEC_VDW_VF,outeriter*10 + inneriter*71);
545 * Gromacs nonbonded kernel: nb_kernel_ElecGB_VdwLJ_GeomP1P1_F_avx_256_single
546 * Electrostatics interaction: GeneralizedBorn
547 * VdW interaction: LennardJones
548 * Geometry: Particle-Particle
549 * Calculate force/pot: Force
552 nb_kernel_ElecGB_VdwLJ_GeomP1P1_F_avx_256_single
553 (t_nblist * gmx_restrict nlist,
554 rvec * gmx_restrict xx,
555 rvec * gmx_restrict ff,
556 t_forcerec * gmx_restrict fr,
557 t_mdatoms * gmx_restrict mdatoms,
558 nb_kernel_data_t * gmx_restrict kernel_data,
559 t_nrnb * gmx_restrict nrnb)
561 /* Suffixes 0,1,2,3 refer to particle indices for waters in the inner or outer loop, or
562 * just 0 for non-waters.
563 * Suffixes A,B,C,D,E,F,G,H refer to j loop unrolling done with AVX, e.g. for the eight different
564 * jnr indices corresponding to data put in the four positions in the SIMD register.
566 int i_shift_offset,i_coord_offset,outeriter,inneriter;
567 int j_index_start,j_index_end,jidx,nri,inr,ggid,iidx;
568 int jnrA,jnrB,jnrC,jnrD;
569 int jnrE,jnrF,jnrG,jnrH;
570 int jnrlistA,jnrlistB,jnrlistC,jnrlistD;
571 int jnrlistE,jnrlistF,jnrlistG,jnrlistH;
572 int j_coord_offsetA,j_coord_offsetB,j_coord_offsetC,j_coord_offsetD;
573 int j_coord_offsetE,j_coord_offsetF,j_coord_offsetG,j_coord_offsetH;
574 int *iinr,*jindex,*jjnr,*shiftidx,*gid;
576 real *shiftvec,*fshift,*x,*f;
577 real *fjptrA,*fjptrB,*fjptrC,*fjptrD,*fjptrE,*fjptrF,*fjptrG,*fjptrH;
579 __m256 tx,ty,tz,fscal,rcutoff,rcutoff2,jidxall;
580 real * vdwioffsetptr0;
581 __m256 ix0,iy0,iz0,fix0,fiy0,fiz0,iq0,isai0;
582 int vdwjidx0A,vdwjidx0B,vdwjidx0C,vdwjidx0D,vdwjidx0E,vdwjidx0F,vdwjidx0G,vdwjidx0H;
583 __m256 jx0,jy0,jz0,fjx0,fjy0,fjz0,jq0,isaj0;
584 __m256 dx00,dy00,dz00,rsq00,rinv00,rinvsq00,r00,qq00,c6_00,c12_00;
585 __m256 velec,felec,velecsum,facel,crf,krf,krf2;
588 __m128i gbitab_lo,gbitab_hi;
589 __m256 vgb,fgb,vgbsum,dvdasum,gbscale,gbtabscale,isaprod,gbqqfactor,gbinvepsdiff,gbeps,dvdatmp;
590 __m256 minushalf = _mm256_set1_ps(-0.5);
591 real *invsqrta,*dvda,*gbtab;
593 __m256 rinvsix,rvdw,vvdw,vvdw6,vvdw12,fvdw,fvdw6,fvdw12,vvdwsum,sh_vdw_invrcut6;
596 __m256 one_sixth = _mm256_set1_ps(1.0/6.0);
597 __m256 one_twelfth = _mm256_set1_ps(1.0/12.0);
599 __m128i vfitab_lo,vfitab_hi;
600 __m128i ifour = _mm_set1_epi32(4);
601 __m256 rt,vfeps,vftabscale,Y,F,G,H,Heps,Fp,VV,FF;
603 __m256 dummy_mask,cutoff_mask;
604 __m256 signbit = _mm256_castsi256_ps( _mm256_set1_epi32(0x80000000) );
605 __m256 one = _mm256_set1_ps(1.0);
606 __m256 two = _mm256_set1_ps(2.0);
612 jindex = nlist->jindex;
614 shiftidx = nlist->shift;
616 shiftvec = fr->shift_vec[0];
617 fshift = fr->fshift[0];
618 facel = _mm256_set1_ps(fr->epsfac);
619 charge = mdatoms->chargeA;
620 nvdwtype = fr->ntype;
622 vdwtype = mdatoms->typeA;
624 invsqrta = fr->invsqrta;
626 gbtabscale = _mm256_set1_ps(fr->gbtab.scale);
627 gbtab = fr->gbtab.data;
628 gbinvepsdiff = _mm256_set1_ps((1.0/fr->epsilon_r) - (1.0/fr->gb_epsilon_solvent));
630 /* Avoid stupid compiler warnings */
631 jnrA = jnrB = jnrC = jnrD = jnrE = jnrF = jnrG = jnrH = 0;
644 for(iidx=0;iidx<4*DIM;iidx++)
649 /* Start outer loop over neighborlists */
650 for(iidx=0; iidx<nri; iidx++)
652 /* Load shift vector for this list */
653 i_shift_offset = DIM*shiftidx[iidx];
655 /* Load limits for loop over neighbors */
656 j_index_start = jindex[iidx];
657 j_index_end = jindex[iidx+1];
659 /* Get outer coordinate index */
661 i_coord_offset = DIM*inr;
663 /* Load i particle coords and add shift vector */
664 gmx_mm256_load_shift_and_1rvec_broadcast_ps(shiftvec+i_shift_offset,x+i_coord_offset,&ix0,&iy0,&iz0);
666 fix0 = _mm256_setzero_ps();
667 fiy0 = _mm256_setzero_ps();
668 fiz0 = _mm256_setzero_ps();
670 /* Load parameters for i particles */
671 iq0 = _mm256_mul_ps(facel,_mm256_set1_ps(charge[inr+0]));
672 isai0 = _mm256_set1_ps(invsqrta[inr+0]);
673 vdwioffsetptr0 = vdwparam+2*nvdwtype*vdwtype[inr+0];
675 dvdasum = _mm256_setzero_ps();
677 /* Start inner kernel loop */
678 for(jidx=j_index_start; jidx<j_index_end && jjnr[jidx+7]>=0; jidx+=8)
681 /* Get j neighbor index, and coordinate index */
690 j_coord_offsetA = DIM*jnrA;
691 j_coord_offsetB = DIM*jnrB;
692 j_coord_offsetC = DIM*jnrC;
693 j_coord_offsetD = DIM*jnrD;
694 j_coord_offsetE = DIM*jnrE;
695 j_coord_offsetF = DIM*jnrF;
696 j_coord_offsetG = DIM*jnrG;
697 j_coord_offsetH = DIM*jnrH;
699 /* load j atom coordinates */
700 gmx_mm256_load_1rvec_8ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB,
701 x+j_coord_offsetC,x+j_coord_offsetD,
702 x+j_coord_offsetE,x+j_coord_offsetF,
703 x+j_coord_offsetG,x+j_coord_offsetH,
706 /* Calculate displacement vector */
707 dx00 = _mm256_sub_ps(ix0,jx0);
708 dy00 = _mm256_sub_ps(iy0,jy0);
709 dz00 = _mm256_sub_ps(iz0,jz0);
711 /* Calculate squared distance and things based on it */
712 rsq00 = gmx_mm256_calc_rsq_ps(dx00,dy00,dz00);
714 rinv00 = gmx_mm256_invsqrt_ps(rsq00);
716 rinvsq00 = _mm256_mul_ps(rinv00,rinv00);
718 /* Load parameters for j particles */
719 jq0 = gmx_mm256_load_8real_swizzle_ps(charge+jnrA+0,charge+jnrB+0,
720 charge+jnrC+0,charge+jnrD+0,
721 charge+jnrE+0,charge+jnrF+0,
722 charge+jnrG+0,charge+jnrH+0);
723 isaj0 = gmx_mm256_load_8real_swizzle_ps(invsqrta+jnrA+0,invsqrta+jnrB+0,
724 invsqrta+jnrC+0,invsqrta+jnrD+0,
725 invsqrta+jnrE+0,invsqrta+jnrF+0,
726 invsqrta+jnrG+0,invsqrta+jnrH+0);
727 vdwjidx0A = 2*vdwtype[jnrA+0];
728 vdwjidx0B = 2*vdwtype[jnrB+0];
729 vdwjidx0C = 2*vdwtype[jnrC+0];
730 vdwjidx0D = 2*vdwtype[jnrD+0];
731 vdwjidx0E = 2*vdwtype[jnrE+0];
732 vdwjidx0F = 2*vdwtype[jnrF+0];
733 vdwjidx0G = 2*vdwtype[jnrG+0];
734 vdwjidx0H = 2*vdwtype[jnrH+0];
736 /**************************
737 * CALCULATE INTERACTIONS *
738 **************************/
740 r00 = _mm256_mul_ps(rsq00,rinv00);
742 /* Compute parameters for interactions between i and j atoms */
743 qq00 = _mm256_mul_ps(iq0,jq0);
744 gmx_mm256_load_8pair_swizzle_ps(vdwioffsetptr0+vdwjidx0A,
745 vdwioffsetptr0+vdwjidx0B,
746 vdwioffsetptr0+vdwjidx0C,
747 vdwioffsetptr0+vdwjidx0D,
748 vdwioffsetptr0+vdwjidx0E,
749 vdwioffsetptr0+vdwjidx0F,
750 vdwioffsetptr0+vdwjidx0G,
751 vdwioffsetptr0+vdwjidx0H,
754 /* GENERALIZED BORN AND COULOMB ELECTROSTATICS */
755 isaprod = _mm256_mul_ps(isai0,isaj0);
756 gbqqfactor = _mm256_xor_ps(signbit,_mm256_mul_ps(qq00,_mm256_mul_ps(isaprod,gbinvepsdiff)));
757 gbscale = _mm256_mul_ps(isaprod,gbtabscale);
759 /* Calculate generalized born table index - this is a separate table from the normal one,
760 * but we use the same procedure by multiplying r with scale and truncating to integer.
762 rt = _mm256_mul_ps(r00,gbscale);
763 gbitab = _mm256_cvttps_epi32(rt);
764 gbeps = _mm256_sub_ps(rt,_mm256_round_ps(rt, _MM_FROUND_FLOOR));
765 /* AVX1 does not support 256-bit integer operations, so now we go to 128-bit mode... */
766 gbitab_lo = _mm256_extractf128_si256(gbitab,0x0);
767 gbitab_hi = _mm256_extractf128_si256(gbitab,0x1);
768 gbitab_lo = _mm_slli_epi32(gbitab_lo,2);
769 gbitab_hi = _mm_slli_epi32(gbitab_hi,2);
770 Y = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,0)),
771 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,0)));
772 F = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,1)),
773 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,1)));
774 G = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,2)),
775 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,2)));
776 H = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,3)),
777 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,3)));
778 GMX_MM256_HALFTRANSPOSE4_PS(Y,F,G,H);
779 Heps = _mm256_mul_ps(gbeps,H);
780 Fp = _mm256_add_ps(F,_mm256_mul_ps(gbeps,_mm256_add_ps(G,Heps)));
781 VV = _mm256_add_ps(Y,_mm256_mul_ps(gbeps,Fp));
782 vgb = _mm256_mul_ps(gbqqfactor,VV);
784 FF = _mm256_add_ps(Fp,_mm256_mul_ps(gbeps,_mm256_add_ps(G,_mm256_add_ps(Heps,Heps))));
785 fgb = _mm256_mul_ps(gbqqfactor,_mm256_mul_ps(FF,gbscale));
786 dvdatmp = _mm256_mul_ps(minushalf,_mm256_add_ps(vgb,_mm256_mul_ps(fgb,r00)));
787 dvdasum = _mm256_add_ps(dvdasum,dvdatmp);
796 gmx_mm256_increment_8real_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,fjptrE,fjptrF,fjptrG,fjptrH,
797 _mm256_mul_ps(dvdatmp,_mm256_mul_ps(isaj0,isaj0)));
798 velec = _mm256_mul_ps(qq00,rinv00);
799 felec = _mm256_mul_ps(_mm256_sub_ps(_mm256_mul_ps(velec,rinv00),fgb),rinv00);
801 /* LENNARD-JONES DISPERSION/REPULSION */
803 rinvsix = _mm256_mul_ps(_mm256_mul_ps(rinvsq00,rinvsq00),rinvsq00);
804 fvdw = _mm256_mul_ps(_mm256_sub_ps(_mm256_mul_ps(c12_00,rinvsix),c6_00),_mm256_mul_ps(rinvsix,rinvsq00));
806 fscal = _mm256_add_ps(felec,fvdw);
808 /* Calculate temporary vectorial force */
809 tx = _mm256_mul_ps(fscal,dx00);
810 ty = _mm256_mul_ps(fscal,dy00);
811 tz = _mm256_mul_ps(fscal,dz00);
813 /* Update vectorial force */
814 fix0 = _mm256_add_ps(fix0,tx);
815 fiy0 = _mm256_add_ps(fiy0,ty);
816 fiz0 = _mm256_add_ps(fiz0,tz);
818 fjptrA = f+j_coord_offsetA;
819 fjptrB = f+j_coord_offsetB;
820 fjptrC = f+j_coord_offsetC;
821 fjptrD = f+j_coord_offsetD;
822 fjptrE = f+j_coord_offsetE;
823 fjptrF = f+j_coord_offsetF;
824 fjptrG = f+j_coord_offsetG;
825 fjptrH = f+j_coord_offsetH;
826 gmx_mm256_decrement_1rvec_8ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,fjptrE,fjptrF,fjptrG,fjptrH,tx,ty,tz);
828 /* Inner loop uses 63 flops */
834 /* Get j neighbor index, and coordinate index */
835 jnrlistA = jjnr[jidx];
836 jnrlistB = jjnr[jidx+1];
837 jnrlistC = jjnr[jidx+2];
838 jnrlistD = jjnr[jidx+3];
839 jnrlistE = jjnr[jidx+4];
840 jnrlistF = jjnr[jidx+5];
841 jnrlistG = jjnr[jidx+6];
842 jnrlistH = jjnr[jidx+7];
843 /* Sign of each element will be negative for non-real atoms.
844 * This mask will be 0xFFFFFFFF for dummy entries and 0x0 for real ones,
845 * so use it as val = _mm_andnot_ps(mask,val) to clear dummy entries.
847 dummy_mask = gmx_mm256_set_m128(gmx_mm_castsi128_ps(_mm_cmplt_epi32(_mm_loadu_si128((const __m128i *)(jjnr+jidx+4)),_mm_setzero_si128())),
848 gmx_mm_castsi128_ps(_mm_cmplt_epi32(_mm_loadu_si128((const __m128i *)(jjnr+jidx)),_mm_setzero_si128())));
850 jnrA = (jnrlistA>=0) ? jnrlistA : 0;
851 jnrB = (jnrlistB>=0) ? jnrlistB : 0;
852 jnrC = (jnrlistC>=0) ? jnrlistC : 0;
853 jnrD = (jnrlistD>=0) ? jnrlistD : 0;
854 jnrE = (jnrlistE>=0) ? jnrlistE : 0;
855 jnrF = (jnrlistF>=0) ? jnrlistF : 0;
856 jnrG = (jnrlistG>=0) ? jnrlistG : 0;
857 jnrH = (jnrlistH>=0) ? jnrlistH : 0;
858 j_coord_offsetA = DIM*jnrA;
859 j_coord_offsetB = DIM*jnrB;
860 j_coord_offsetC = DIM*jnrC;
861 j_coord_offsetD = DIM*jnrD;
862 j_coord_offsetE = DIM*jnrE;
863 j_coord_offsetF = DIM*jnrF;
864 j_coord_offsetG = DIM*jnrG;
865 j_coord_offsetH = DIM*jnrH;
867 /* load j atom coordinates */
868 gmx_mm256_load_1rvec_8ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB,
869 x+j_coord_offsetC,x+j_coord_offsetD,
870 x+j_coord_offsetE,x+j_coord_offsetF,
871 x+j_coord_offsetG,x+j_coord_offsetH,
874 /* Calculate displacement vector */
875 dx00 = _mm256_sub_ps(ix0,jx0);
876 dy00 = _mm256_sub_ps(iy0,jy0);
877 dz00 = _mm256_sub_ps(iz0,jz0);
879 /* Calculate squared distance and things based on it */
880 rsq00 = gmx_mm256_calc_rsq_ps(dx00,dy00,dz00);
882 rinv00 = gmx_mm256_invsqrt_ps(rsq00);
884 rinvsq00 = _mm256_mul_ps(rinv00,rinv00);
886 /* Load parameters for j particles */
887 jq0 = gmx_mm256_load_8real_swizzle_ps(charge+jnrA+0,charge+jnrB+0,
888 charge+jnrC+0,charge+jnrD+0,
889 charge+jnrE+0,charge+jnrF+0,
890 charge+jnrG+0,charge+jnrH+0);
891 isaj0 = gmx_mm256_load_8real_swizzle_ps(invsqrta+jnrA+0,invsqrta+jnrB+0,
892 invsqrta+jnrC+0,invsqrta+jnrD+0,
893 invsqrta+jnrE+0,invsqrta+jnrF+0,
894 invsqrta+jnrG+0,invsqrta+jnrH+0);
895 vdwjidx0A = 2*vdwtype[jnrA+0];
896 vdwjidx0B = 2*vdwtype[jnrB+0];
897 vdwjidx0C = 2*vdwtype[jnrC+0];
898 vdwjidx0D = 2*vdwtype[jnrD+0];
899 vdwjidx0E = 2*vdwtype[jnrE+0];
900 vdwjidx0F = 2*vdwtype[jnrF+0];
901 vdwjidx0G = 2*vdwtype[jnrG+0];
902 vdwjidx0H = 2*vdwtype[jnrH+0];
904 /**************************
905 * CALCULATE INTERACTIONS *
906 **************************/
908 r00 = _mm256_mul_ps(rsq00,rinv00);
909 r00 = _mm256_andnot_ps(dummy_mask,r00);
911 /* Compute parameters for interactions between i and j atoms */
912 qq00 = _mm256_mul_ps(iq0,jq0);
913 gmx_mm256_load_8pair_swizzle_ps(vdwioffsetptr0+vdwjidx0A,
914 vdwioffsetptr0+vdwjidx0B,
915 vdwioffsetptr0+vdwjidx0C,
916 vdwioffsetptr0+vdwjidx0D,
917 vdwioffsetptr0+vdwjidx0E,
918 vdwioffsetptr0+vdwjidx0F,
919 vdwioffsetptr0+vdwjidx0G,
920 vdwioffsetptr0+vdwjidx0H,
923 /* GENERALIZED BORN AND COULOMB ELECTROSTATICS */
924 isaprod = _mm256_mul_ps(isai0,isaj0);
925 gbqqfactor = _mm256_xor_ps(signbit,_mm256_mul_ps(qq00,_mm256_mul_ps(isaprod,gbinvepsdiff)));
926 gbscale = _mm256_mul_ps(isaprod,gbtabscale);
928 /* Calculate generalized born table index - this is a separate table from the normal one,
929 * but we use the same procedure by multiplying r with scale and truncating to integer.
931 rt = _mm256_mul_ps(r00,gbscale);
932 gbitab = _mm256_cvttps_epi32(rt);
933 gbeps = _mm256_sub_ps(rt,_mm256_round_ps(rt, _MM_FROUND_FLOOR));
934 /* AVX1 does not support 256-bit integer operations, so now we go to 128-bit mode... */
935 gbitab_lo = _mm256_extractf128_si256(gbitab,0x0);
936 gbitab_hi = _mm256_extractf128_si256(gbitab,0x1);
937 gbitab_lo = _mm_slli_epi32(gbitab_lo,2);
938 gbitab_hi = _mm_slli_epi32(gbitab_hi,2);
939 Y = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,0)),
940 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,0)));
941 F = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,1)),
942 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,1)));
943 G = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,2)),
944 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,2)));
945 H = gmx_mm256_set_m128(_mm_load_ps(gbtab + _mm_extract_epi32(gbitab_hi,3)),
946 _mm_load_ps(gbtab + _mm_extract_epi32(gbitab_lo,3)));
947 GMX_MM256_HALFTRANSPOSE4_PS(Y,F,G,H);
948 Heps = _mm256_mul_ps(gbeps,H);
949 Fp = _mm256_add_ps(F,_mm256_mul_ps(gbeps,_mm256_add_ps(G,Heps)));
950 VV = _mm256_add_ps(Y,_mm256_mul_ps(gbeps,Fp));
951 vgb = _mm256_mul_ps(gbqqfactor,VV);
953 FF = _mm256_add_ps(Fp,_mm256_mul_ps(gbeps,_mm256_add_ps(G,_mm256_add_ps(Heps,Heps))));
954 fgb = _mm256_mul_ps(gbqqfactor,_mm256_mul_ps(FF,gbscale));
955 dvdatmp = _mm256_mul_ps(minushalf,_mm256_add_ps(vgb,_mm256_mul_ps(fgb,r00)));
956 dvdasum = _mm256_add_ps(dvdasum,dvdatmp);
957 /* 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. */
958 fjptrA = (jnrlistA>=0) ? dvda+jnrA : scratch;
959 fjptrB = (jnrlistB>=0) ? dvda+jnrB : scratch;
960 fjptrC = (jnrlistC>=0) ? dvda+jnrC : scratch;
961 fjptrD = (jnrlistD>=0) ? dvda+jnrD : scratch;
962 fjptrE = (jnrlistE>=0) ? dvda+jnrE : scratch;
963 fjptrF = (jnrlistF>=0) ? dvda+jnrF : scratch;
964 fjptrG = (jnrlistG>=0) ? dvda+jnrG : scratch;
965 fjptrH = (jnrlistH>=0) ? dvda+jnrH : scratch;
966 gmx_mm256_increment_8real_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,fjptrE,fjptrF,fjptrG,fjptrH,
967 _mm256_mul_ps(dvdatmp,_mm256_mul_ps(isaj0,isaj0)));
968 velec = _mm256_mul_ps(qq00,rinv00);
969 felec = _mm256_mul_ps(_mm256_sub_ps(_mm256_mul_ps(velec,rinv00),fgb),rinv00);
971 /* LENNARD-JONES DISPERSION/REPULSION */
973 rinvsix = _mm256_mul_ps(_mm256_mul_ps(rinvsq00,rinvsq00),rinvsq00);
974 fvdw = _mm256_mul_ps(_mm256_sub_ps(_mm256_mul_ps(c12_00,rinvsix),c6_00),_mm256_mul_ps(rinvsix,rinvsq00));
976 fscal = _mm256_add_ps(felec,fvdw);
978 fscal = _mm256_andnot_ps(dummy_mask,fscal);
980 /* Calculate temporary vectorial force */
981 tx = _mm256_mul_ps(fscal,dx00);
982 ty = _mm256_mul_ps(fscal,dy00);
983 tz = _mm256_mul_ps(fscal,dz00);
985 /* Update vectorial force */
986 fix0 = _mm256_add_ps(fix0,tx);
987 fiy0 = _mm256_add_ps(fiy0,ty);
988 fiz0 = _mm256_add_ps(fiz0,tz);
990 fjptrA = (jnrlistA>=0) ? f+j_coord_offsetA : scratch;
991 fjptrB = (jnrlistB>=0) ? f+j_coord_offsetB : scratch;
992 fjptrC = (jnrlistC>=0) ? f+j_coord_offsetC : scratch;
993 fjptrD = (jnrlistD>=0) ? f+j_coord_offsetD : scratch;
994 fjptrE = (jnrlistE>=0) ? f+j_coord_offsetE : scratch;
995 fjptrF = (jnrlistF>=0) ? f+j_coord_offsetF : scratch;
996 fjptrG = (jnrlistG>=0) ? f+j_coord_offsetG : scratch;
997 fjptrH = (jnrlistH>=0) ? f+j_coord_offsetH : scratch;
998 gmx_mm256_decrement_1rvec_8ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,fjptrE,fjptrF,fjptrG,fjptrH,tx,ty,tz);
1000 /* Inner loop uses 64 flops */
1003 /* End of innermost loop */
1005 gmx_mm256_update_iforce_1atom_swizzle_ps(fix0,fiy0,fiz0,
1006 f+i_coord_offset,fshift+i_shift_offset);
1008 dvdasum = _mm256_mul_ps(dvdasum, _mm256_mul_ps(isai0,isai0));
1009 gmx_mm256_update_1pot_ps(dvdasum,dvda+inr);
1011 /* Increment number of inner iterations */
1012 inneriter += j_index_end - j_index_start;
1014 /* Outer loop uses 7 flops */
1017 /* Increment number of outer iterations */
1020 /* Update outer/inner flops */
1022 inc_nrnb(nrnb,eNR_NBKERNEL_ELEC_VDW_F,outeriter*7 + inneriter*64);