| File: | gromacs/gmxlib/nonbonded/nb_kernel_sse4_1_single/nb_kernel_ElecNone_VdwLJEw_GeomP1P1_sse4_1_single.c |
| Location: | line 120, column 5 |
| Description: | Value stored to 'sh_lj_ewald' is never read |
| 1 | /* |
| 2 | * This file is part of the GROMACS molecular simulation package. |
| 3 | * |
| 4 | * Copyright (c) 2012,2013,2014, by the GROMACS development team, led by |
| 5 | * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl, |
| 6 | * and including many others, as listed in the AUTHORS file in the |
| 7 | * top-level source directory and at http://www.gromacs.org. |
| 8 | * |
| 9 | * GROMACS is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU Lesser General Public License |
| 11 | * as published by the Free Software Foundation; either version 2.1 |
| 12 | * of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * GROMACS is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with GROMACS; if not, see |
| 21 | * http://www.gnu.org/licenses, or write to the Free Software Foundation, |
| 22 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 23 | * |
| 24 | * If you want to redistribute modifications to GROMACS, please |
| 25 | * consider that scientific software is very special. Version |
| 26 | * control is crucial - bugs must be traceable. We will be happy to |
| 27 | * consider code for inclusion in the official distribution, but |
| 28 | * derived work must not be called official GROMACS. Details are found |
| 29 | * in the README & COPYING files - if they are missing, get the |
| 30 | * official version at http://www.gromacs.org. |
| 31 | * |
| 32 | * To help us fund GROMACS development, we humbly ask that you cite |
| 33 | * the research papers on the package. Check out http://www.gromacs.org. |
| 34 | */ |
| 35 | /* |
| 36 | * Note: this file was generated by the GROMACS sse4_1_single kernel generator. |
| 37 | */ |
| 38 | #ifdef HAVE_CONFIG_H1 |
| 39 | #include <config.h> |
| 40 | #endif |
| 41 | |
| 42 | #include <math.h> |
| 43 | |
| 44 | #include "../nb_kernel.h" |
| 45 | #include "types/simple.h" |
| 46 | #include "gromacs/math/vec.h" |
| 47 | #include "nrnb.h" |
| 48 | |
| 49 | #include "gromacs/simd/math_x86_sse4_1_single.h" |
| 50 | #include "kernelutil_x86_sse4_1_single.h" |
| 51 | |
| 52 | /* |
| 53 | * Gromacs nonbonded kernel: nb_kernel_ElecNone_VdwLJEw_GeomP1P1_VF_sse4_1_single |
| 54 | * Electrostatics interaction: None |
| 55 | * VdW interaction: LJEwald |
| 56 | * Geometry: Particle-Particle |
| 57 | * Calculate force/pot: PotentialAndForce |
| 58 | */ |
| 59 | void |
| 60 | nb_kernel_ElecNone_VdwLJEw_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_unused__attribute__ ((unused)) * gmx_restrict kernel_data, |
| 67 | t_nrnb * gmx_restrict nrnb) |
| 68 | { |
| 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. |
| 73 | */ |
| 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; |
| 80 | real rcutoff_scalar; |
| 81 | real *shiftvec,*fshift,*x,*f; |
| 82 | real *fjptrA,*fjptrB,*fjptrC,*fjptrD; |
| 83 | real scratch[4*DIM3]; |
| 84 | __m128 tx,ty,tz,fscal,rcutoff,rcutoff2,jidxall; |
| 85 | int vdwioffset0; |
| 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 | int nvdwtype; |
| 91 | __m128 rinvsix,rvdw,vvdw,vvdw6,vvdw12,fvdw,fvdw6,fvdw12,vvdwsum,sh_vdw_invrcut6; |
| 92 | int *vdwtype; |
| 93 | real *vdwparam; |
| 94 | __m128 one_sixth = _mm_set1_ps(1.0/6.0); |
| 95 | __m128 one_twelfth = _mm_set1_ps(1.0/12.0); |
| 96 | __m128 c6grid_00; |
| 97 | __m128 ewclj,ewclj2,ewclj6,ewcljrsq,poly,exponent,f6A,f6B,sh_lj_ewald; |
| 98 | real *vdwgridparam; |
| 99 | __m128 one_half = _mm_set1_ps(0.5); |
| 100 | __m128 minus_one = _mm_set1_ps(-1.0); |
| 101 | __m128 dummy_mask,cutoff_mask; |
| 102 | __m128 signbit = _mm_castsi128_ps( _mm_set1_epi32(0x80000000) ); |
| 103 | __m128 one = _mm_set1_ps(1.0); |
| 104 | __m128 two = _mm_set1_ps(2.0); |
| 105 | x = xx[0]; |
| 106 | f = ff[0]; |
| 107 | |
| 108 | nri = nlist->nri; |
| 109 | iinr = nlist->iinr; |
| 110 | jindex = nlist->jindex; |
| 111 | jjnr = nlist->jjnr; |
| 112 | shiftidx = nlist->shift; |
| 113 | gid = nlist->gid; |
| 114 | shiftvec = fr->shift_vec[0]; |
| 115 | fshift = fr->fshift[0]; |
| 116 | nvdwtype = fr->ntype; |
| 117 | vdwparam = fr->nbfp; |
| 118 | vdwtype = mdatoms->typeA; |
| 119 | vdwgridparam = fr->ljpme_c6grid; |
| 120 | sh_lj_ewald = _mm_set1_ps(fr->ic->sh_lj_ewald); |
Value stored to 'sh_lj_ewald' is never read | |
| 121 | ewclj = _mm_set1_ps(fr->ewaldcoeff_lj); |
| 122 | ewclj2 = _mm_mul_ps(minus_one,_mm_mul_ps(ewclj,ewclj)); |
| 123 | |
| 124 | /* Avoid stupid compiler warnings */ |
| 125 | jnrA = jnrB = jnrC = jnrD = 0; |
| 126 | j_coord_offsetA = 0; |
| 127 | j_coord_offsetB = 0; |
| 128 | j_coord_offsetC = 0; |
| 129 | j_coord_offsetD = 0; |
| 130 | |
| 131 | outeriter = 0; |
| 132 | inneriter = 0; |
| 133 | |
| 134 | for(iidx=0;iidx<4*DIM3;iidx++) |
| 135 | { |
| 136 | scratch[iidx] = 0.0; |
| 137 | } |
| 138 | |
| 139 | /* Start outer loop over neighborlists */ |
| 140 | for(iidx=0; iidx<nri; iidx++) |
| 141 | { |
| 142 | /* Load shift vector for this list */ |
| 143 | i_shift_offset = DIM3*shiftidx[iidx]; |
| 144 | |
| 145 | /* Load limits for loop over neighbors */ |
| 146 | j_index_start = jindex[iidx]; |
| 147 | j_index_end = jindex[iidx+1]; |
| 148 | |
| 149 | /* Get outer coordinate index */ |
| 150 | inr = iinr[iidx]; |
| 151 | i_coord_offset = DIM3*inr; |
| 152 | |
| 153 | /* Load i particle coords and add shift vector */ |
| 154 | gmx_mm_load_shift_and_1rvec_broadcast_ps(shiftvec+i_shift_offset,x+i_coord_offset,&ix0,&iy0,&iz0); |
| 155 | |
| 156 | fix0 = _mm_setzero_ps(); |
| 157 | fiy0 = _mm_setzero_ps(); |
| 158 | fiz0 = _mm_setzero_ps(); |
| 159 | |
| 160 | /* Load parameters for i particles */ |
| 161 | vdwioffset0 = 2*nvdwtype*vdwtype[inr+0]; |
| 162 | |
| 163 | /* Reset potential sums */ |
| 164 | vvdwsum = _mm_setzero_ps(); |
| 165 | |
| 166 | /* Start inner kernel loop */ |
| 167 | for(jidx=j_index_start; jidx<j_index_end && jjnr[jidx+3]>=0; jidx+=4) |
| 168 | { |
| 169 | |
| 170 | /* Get j neighbor index, and coordinate index */ |
| 171 | jnrA = jjnr[jidx]; |
| 172 | jnrB = jjnr[jidx+1]; |
| 173 | jnrC = jjnr[jidx+2]; |
| 174 | jnrD = jjnr[jidx+3]; |
| 175 | j_coord_offsetA = DIM3*jnrA; |
| 176 | j_coord_offsetB = DIM3*jnrB; |
| 177 | j_coord_offsetC = DIM3*jnrC; |
| 178 | j_coord_offsetD = DIM3*jnrD; |
| 179 | |
| 180 | /* load j atom coordinates */ |
| 181 | gmx_mm_load_1rvec_4ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB, |
| 182 | x+j_coord_offsetC,x+j_coord_offsetD, |
| 183 | &jx0,&jy0,&jz0); |
| 184 | |
| 185 | /* Calculate displacement vector */ |
| 186 | dx00 = _mm_sub_ps(ix0,jx0); |
| 187 | dy00 = _mm_sub_ps(iy0,jy0); |
| 188 | dz00 = _mm_sub_ps(iz0,jz0); |
| 189 | |
| 190 | /* Calculate squared distance and things based on it */ |
| 191 | rsq00 = gmx_mm_calc_rsq_ps(dx00,dy00,dz00); |
| 192 | |
| 193 | rinv00 = gmx_mm_invsqrt_psgmx_simd_invsqrt_f(rsq00); |
| 194 | |
| 195 | rinvsq00 = _mm_mul_ps(rinv00,rinv00); |
| 196 | |
| 197 | /* Load parameters for j particles */ |
| 198 | vdwjidx0A = 2*vdwtype[jnrA+0]; |
| 199 | vdwjidx0B = 2*vdwtype[jnrB+0]; |
| 200 | vdwjidx0C = 2*vdwtype[jnrC+0]; |
| 201 | vdwjidx0D = 2*vdwtype[jnrD+0]; |
| 202 | |
| 203 | /************************** |
| 204 | * CALCULATE INTERACTIONS * |
| 205 | **************************/ |
| 206 | |
| 207 | r00 = _mm_mul_ps(rsq00,rinv00); |
| 208 | |
| 209 | /* Compute parameters for interactions between i and j atoms */ |
| 210 | gmx_mm_load_4pair_swizzle_ps(vdwparam+vdwioffset0+vdwjidx0A, |
| 211 | vdwparam+vdwioffset0+vdwjidx0B, |
| 212 | vdwparam+vdwioffset0+vdwjidx0C, |
| 213 | vdwparam+vdwioffset0+vdwjidx0D, |
| 214 | &c6_00,&c12_00); |
| 215 | |
| 216 | c6grid_00 = gmx_mm_load_4real_swizzle_ps(vdwgridparam+vdwioffset0+vdwjidx0A, |
| 217 | vdwgridparam+vdwioffset0+vdwjidx0B, |
| 218 | vdwgridparam+vdwioffset0+vdwjidx0C, |
| 219 | vdwgridparam+vdwioffset0+vdwjidx0D); |
| 220 | |
| 221 | /* Analytical LJ-PME */ |
| 222 | rinvsix = _mm_mul_ps(_mm_mul_ps(rinvsq00,rinvsq00),rinvsq00); |
| 223 | ewcljrsq = _mm_mul_ps(ewclj2,rsq00); |
| 224 | ewclj6 = _mm_mul_ps(ewclj2,_mm_mul_ps(ewclj2,ewclj2)); |
| 225 | exponent = gmx_simd_exp_rgmx_simd_exp_f(ewcljrsq); |
| 226 | /* poly = exp(-(beta*r)^2) * (1 + (beta*r)^2 + (beta*r)^4 /2) */ |
| 227 | poly = _mm_mul_ps(exponent,_mm_add_ps(_mm_sub_ps(one,ewcljrsq),_mm_mul_ps(_mm_mul_ps(ewcljrsq,ewcljrsq),one_half))); |
| 228 | /* vvdw6 = [C6 - C6grid * (1-poly)]/r6 */ |
| 229 | vvdw6 = _mm_mul_ps(_mm_sub_ps(c6_00,_mm_mul_ps(c6grid_00,_mm_sub_ps(one,poly))),rinvsix); |
| 230 | vvdw12 = _mm_mul_ps(c12_00,_mm_mul_ps(rinvsix,rinvsix)); |
| 231 | vvdw = _mm_sub_ps(_mm_mul_ps(vvdw12,one_twelfth),_mm_mul_ps(vvdw6,one_sixth)); |
| 232 | /* fvdw = vvdw12/r - (vvdw6/r + (C6grid * exponent * beta^6)/r) */ |
| 233 | fvdw = _mm_mul_ps(_mm_sub_ps(vvdw12,_mm_sub_ps(vvdw6,_mm_mul_ps(_mm_mul_ps(c6grid_00,one_sixth),_mm_mul_ps(exponent,ewclj6)))),rinvsq00); |
| 234 | |
| 235 | /* Update potential sum for this i atom from the interaction with this j atom. */ |
| 236 | vvdwsum = _mm_add_ps(vvdwsum,vvdw); |
| 237 | |
| 238 | fscal = fvdw; |
| 239 | |
| 240 | /* Calculate temporary vectorial force */ |
| 241 | tx = _mm_mul_ps(fscal,dx00); |
| 242 | ty = _mm_mul_ps(fscal,dy00); |
| 243 | tz = _mm_mul_ps(fscal,dz00); |
| 244 | |
| 245 | /* Update vectorial force */ |
| 246 | fix0 = _mm_add_ps(fix0,tx); |
| 247 | fiy0 = _mm_add_ps(fiy0,ty); |
| 248 | fiz0 = _mm_add_ps(fiz0,tz); |
| 249 | |
| 250 | fjptrA = f+j_coord_offsetA; |
| 251 | fjptrB = f+j_coord_offsetB; |
| 252 | fjptrC = f+j_coord_offsetC; |
| 253 | fjptrD = f+j_coord_offsetD; |
| 254 | gmx_mm_decrement_1rvec_4ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,tx,ty,tz); |
| 255 | |
| 256 | /* Inner loop uses 51 flops */ |
| 257 | } |
| 258 | |
| 259 | if(jidx<j_index_end) |
| 260 | { |
| 261 | |
| 262 | /* Get j neighbor index, and coordinate index */ |
| 263 | jnrlistA = jjnr[jidx]; |
| 264 | jnrlistB = jjnr[jidx+1]; |
| 265 | jnrlistC = jjnr[jidx+2]; |
| 266 | jnrlistD = jjnr[jidx+3]; |
| 267 | /* Sign of each element will be negative for non-real atoms. |
| 268 | * This mask will be 0xFFFFFFFF for dummy entries and 0x0 for real ones, |
| 269 | * so use it as val = _mm_andnot_ps(mask,val) to clear dummy entries. |
| 270 | */ |
| 271 | dummy_mask = gmx_mm_castsi128_ps_mm_castsi128_ps(_mm_cmplt_epi32(_mm_loadu_si128((const __m128i *)(jjnr+jidx)),_mm_setzero_si128())); |
| 272 | jnrA = (jnrlistA>=0) ? jnrlistA : 0; |
| 273 | jnrB = (jnrlistB>=0) ? jnrlistB : 0; |
| 274 | jnrC = (jnrlistC>=0) ? jnrlistC : 0; |
| 275 | jnrD = (jnrlistD>=0) ? jnrlistD : 0; |
| 276 | j_coord_offsetA = DIM3*jnrA; |
| 277 | j_coord_offsetB = DIM3*jnrB; |
| 278 | j_coord_offsetC = DIM3*jnrC; |
| 279 | j_coord_offsetD = DIM3*jnrD; |
| 280 | |
| 281 | /* load j atom coordinates */ |
| 282 | gmx_mm_load_1rvec_4ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB, |
| 283 | x+j_coord_offsetC,x+j_coord_offsetD, |
| 284 | &jx0,&jy0,&jz0); |
| 285 | |
| 286 | /* Calculate displacement vector */ |
| 287 | dx00 = _mm_sub_ps(ix0,jx0); |
| 288 | dy00 = _mm_sub_ps(iy0,jy0); |
| 289 | dz00 = _mm_sub_ps(iz0,jz0); |
| 290 | |
| 291 | /* Calculate squared distance and things based on it */ |
| 292 | rsq00 = gmx_mm_calc_rsq_ps(dx00,dy00,dz00); |
| 293 | |
| 294 | rinv00 = gmx_mm_invsqrt_psgmx_simd_invsqrt_f(rsq00); |
| 295 | |
| 296 | rinvsq00 = _mm_mul_ps(rinv00,rinv00); |
| 297 | |
| 298 | /* Load parameters for j particles */ |
| 299 | vdwjidx0A = 2*vdwtype[jnrA+0]; |
| 300 | vdwjidx0B = 2*vdwtype[jnrB+0]; |
| 301 | vdwjidx0C = 2*vdwtype[jnrC+0]; |
| 302 | vdwjidx0D = 2*vdwtype[jnrD+0]; |
| 303 | |
| 304 | /************************** |
| 305 | * CALCULATE INTERACTIONS * |
| 306 | **************************/ |
| 307 | |
| 308 | r00 = _mm_mul_ps(rsq00,rinv00); |
| 309 | r00 = _mm_andnot_ps(dummy_mask,r00); |
| 310 | |
| 311 | /* Compute parameters for interactions between i and j atoms */ |
| 312 | gmx_mm_load_4pair_swizzle_ps(vdwparam+vdwioffset0+vdwjidx0A, |
| 313 | vdwparam+vdwioffset0+vdwjidx0B, |
| 314 | vdwparam+vdwioffset0+vdwjidx0C, |
| 315 | vdwparam+vdwioffset0+vdwjidx0D, |
| 316 | &c6_00,&c12_00); |
| 317 | |
| 318 | c6grid_00 = gmx_mm_load_4real_swizzle_ps(vdwgridparam+vdwioffset0+vdwjidx0A, |
| 319 | vdwgridparam+vdwioffset0+vdwjidx0B, |
| 320 | vdwgridparam+vdwioffset0+vdwjidx0C, |
| 321 | vdwgridparam+vdwioffset0+vdwjidx0D); |
| 322 | |
| 323 | /* Analytical LJ-PME */ |
| 324 | rinvsix = _mm_mul_ps(_mm_mul_ps(rinvsq00,rinvsq00),rinvsq00); |
| 325 | ewcljrsq = _mm_mul_ps(ewclj2,rsq00); |
| 326 | ewclj6 = _mm_mul_ps(ewclj2,_mm_mul_ps(ewclj2,ewclj2)); |
| 327 | exponent = gmx_simd_exp_rgmx_simd_exp_f(ewcljrsq); |
| 328 | /* poly = exp(-(beta*r)^2) * (1 + (beta*r)^2 + (beta*r)^4 /2) */ |
| 329 | poly = _mm_mul_ps(exponent,_mm_add_ps(_mm_sub_ps(one,ewcljrsq),_mm_mul_ps(_mm_mul_ps(ewcljrsq,ewcljrsq),one_half))); |
| 330 | /* vvdw6 = [C6 - C6grid * (1-poly)]/r6 */ |
| 331 | vvdw6 = _mm_mul_ps(_mm_sub_ps(c6_00,_mm_mul_ps(c6grid_00,_mm_sub_ps(one,poly))),rinvsix); |
| 332 | vvdw12 = _mm_mul_ps(c12_00,_mm_mul_ps(rinvsix,rinvsix)); |
| 333 | vvdw = _mm_sub_ps(_mm_mul_ps(vvdw12,one_twelfth),_mm_mul_ps(vvdw6,one_sixth)); |
| 334 | /* fvdw = vvdw12/r - (vvdw6/r + (C6grid * exponent * beta^6)/r) */ |
| 335 | fvdw = _mm_mul_ps(_mm_sub_ps(vvdw12,_mm_sub_ps(vvdw6,_mm_mul_ps(_mm_mul_ps(c6grid_00,one_sixth),_mm_mul_ps(exponent,ewclj6)))),rinvsq00); |
| 336 | |
| 337 | /* Update potential sum for this i atom from the interaction with this j atom. */ |
| 338 | vvdw = _mm_andnot_ps(dummy_mask,vvdw); |
| 339 | vvdwsum = _mm_add_ps(vvdwsum,vvdw); |
| 340 | |
| 341 | fscal = fvdw; |
| 342 | |
| 343 | fscal = _mm_andnot_ps(dummy_mask,fscal); |
| 344 | |
| 345 | /* Calculate temporary vectorial force */ |
| 346 | tx = _mm_mul_ps(fscal,dx00); |
| 347 | ty = _mm_mul_ps(fscal,dy00); |
| 348 | tz = _mm_mul_ps(fscal,dz00); |
| 349 | |
| 350 | /* Update vectorial force */ |
| 351 | fix0 = _mm_add_ps(fix0,tx); |
| 352 | fiy0 = _mm_add_ps(fiy0,ty); |
| 353 | fiz0 = _mm_add_ps(fiz0,tz); |
| 354 | |
| 355 | fjptrA = (jnrlistA>=0) ? f+j_coord_offsetA : scratch; |
| 356 | fjptrB = (jnrlistB>=0) ? f+j_coord_offsetB : scratch; |
| 357 | fjptrC = (jnrlistC>=0) ? f+j_coord_offsetC : scratch; |
| 358 | fjptrD = (jnrlistD>=0) ? f+j_coord_offsetD : scratch; |
| 359 | gmx_mm_decrement_1rvec_4ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,tx,ty,tz); |
| 360 | |
| 361 | /* Inner loop uses 52 flops */ |
| 362 | } |
| 363 | |
| 364 | /* End of innermost loop */ |
| 365 | |
| 366 | gmx_mm_update_iforce_1atom_swizzle_ps(fix0,fiy0,fiz0, |
| 367 | f+i_coord_offset,fshift+i_shift_offset); |
| 368 | |
| 369 | ggid = gid[iidx]; |
| 370 | /* Update potential energies */ |
| 371 | gmx_mm_update_1pot_ps(vvdwsum,kernel_data->energygrp_vdw+ggid); |
| 372 | |
| 373 | /* Increment number of inner iterations */ |
| 374 | inneriter += j_index_end - j_index_start; |
| 375 | |
| 376 | /* Outer loop uses 7 flops */ |
| 377 | } |
| 378 | |
| 379 | /* Increment number of outer iterations */ |
| 380 | outeriter += nri; |
| 381 | |
| 382 | /* Update outer/inner flops */ |
| 383 | |
| 384 | inc_nrnb(nrnb,eNR_NBKERNEL_VDW_VF,outeriter*7 + inneriter*52)(nrnb)->n[eNR_NBKERNEL_VDW_VF] += outeriter*7 + inneriter* 52; |
| 385 | } |
| 386 | /* |
| 387 | * Gromacs nonbonded kernel: nb_kernel_ElecNone_VdwLJEw_GeomP1P1_F_sse4_1_single |
| 388 | * Electrostatics interaction: None |
| 389 | * VdW interaction: LJEwald |
| 390 | * Geometry: Particle-Particle |
| 391 | * Calculate force/pot: Force |
| 392 | */ |
| 393 | void |
| 394 | nb_kernel_ElecNone_VdwLJEw_GeomP1P1_F_sse4_1_single |
| 395 | (t_nblist * gmx_restrict nlist, |
| 396 | rvec * gmx_restrict xx, |
| 397 | rvec * gmx_restrict ff, |
| 398 | t_forcerec * gmx_restrict fr, |
| 399 | t_mdatoms * gmx_restrict mdatoms, |
| 400 | nb_kernel_data_t gmx_unused__attribute__ ((unused)) * gmx_restrict kernel_data, |
| 401 | t_nrnb * gmx_restrict nrnb) |
| 402 | { |
| 403 | /* Suffixes 0,1,2,3 refer to particle indices for waters in the inner or outer loop, or |
| 404 | * just 0 for non-waters. |
| 405 | * Suffixes A,B,C,D refer to j loop unrolling done with SSE, e.g. for the four different |
| 406 | * jnr indices corresponding to data put in the four positions in the SIMD register. |
| 407 | */ |
| 408 | int i_shift_offset,i_coord_offset,outeriter,inneriter; |
| 409 | int j_index_start,j_index_end,jidx,nri,inr,ggid,iidx; |
| 410 | int jnrA,jnrB,jnrC,jnrD; |
| 411 | int jnrlistA,jnrlistB,jnrlistC,jnrlistD; |
| 412 | int j_coord_offsetA,j_coord_offsetB,j_coord_offsetC,j_coord_offsetD; |
| 413 | int *iinr,*jindex,*jjnr,*shiftidx,*gid; |
| 414 | real rcutoff_scalar; |
| 415 | real *shiftvec,*fshift,*x,*f; |
| 416 | real *fjptrA,*fjptrB,*fjptrC,*fjptrD; |
| 417 | real scratch[4*DIM3]; |
| 418 | __m128 tx,ty,tz,fscal,rcutoff,rcutoff2,jidxall; |
| 419 | int vdwioffset0; |
| 420 | __m128 ix0,iy0,iz0,fix0,fiy0,fiz0,iq0,isai0; |
| 421 | int vdwjidx0A,vdwjidx0B,vdwjidx0C,vdwjidx0D; |
| 422 | __m128 jx0,jy0,jz0,fjx0,fjy0,fjz0,jq0,isaj0; |
| 423 | __m128 dx00,dy00,dz00,rsq00,rinv00,rinvsq00,r00,qq00,c6_00,c12_00; |
| 424 | int nvdwtype; |
| 425 | __m128 rinvsix,rvdw,vvdw,vvdw6,vvdw12,fvdw,fvdw6,fvdw12,vvdwsum,sh_vdw_invrcut6; |
| 426 | int *vdwtype; |
| 427 | real *vdwparam; |
| 428 | __m128 one_sixth = _mm_set1_ps(1.0/6.0); |
| 429 | __m128 one_twelfth = _mm_set1_ps(1.0/12.0); |
| 430 | __m128 c6grid_00; |
| 431 | __m128 ewclj,ewclj2,ewclj6,ewcljrsq,poly,exponent,f6A,f6B,sh_lj_ewald; |
| 432 | real *vdwgridparam; |
| 433 | __m128 one_half = _mm_set1_ps(0.5); |
| 434 | __m128 minus_one = _mm_set1_ps(-1.0); |
| 435 | __m128 dummy_mask,cutoff_mask; |
| 436 | __m128 signbit = _mm_castsi128_ps( _mm_set1_epi32(0x80000000) ); |
| 437 | __m128 one = _mm_set1_ps(1.0); |
| 438 | __m128 two = _mm_set1_ps(2.0); |
| 439 | x = xx[0]; |
| 440 | f = ff[0]; |
| 441 | |
| 442 | nri = nlist->nri; |
| 443 | iinr = nlist->iinr; |
| 444 | jindex = nlist->jindex; |
| 445 | jjnr = nlist->jjnr; |
| 446 | shiftidx = nlist->shift; |
| 447 | gid = nlist->gid; |
| 448 | shiftvec = fr->shift_vec[0]; |
| 449 | fshift = fr->fshift[0]; |
| 450 | nvdwtype = fr->ntype; |
| 451 | vdwparam = fr->nbfp; |
| 452 | vdwtype = mdatoms->typeA; |
| 453 | vdwgridparam = fr->ljpme_c6grid; |
| 454 | sh_lj_ewald = _mm_set1_ps(fr->ic->sh_lj_ewald); |
| 455 | ewclj = _mm_set1_ps(fr->ewaldcoeff_lj); |
| 456 | ewclj2 = _mm_mul_ps(minus_one,_mm_mul_ps(ewclj,ewclj)); |
| 457 | |
| 458 | /* Avoid stupid compiler warnings */ |
| 459 | jnrA = jnrB = jnrC = jnrD = 0; |
| 460 | j_coord_offsetA = 0; |
| 461 | j_coord_offsetB = 0; |
| 462 | j_coord_offsetC = 0; |
| 463 | j_coord_offsetD = 0; |
| 464 | |
| 465 | outeriter = 0; |
| 466 | inneriter = 0; |
| 467 | |
| 468 | for(iidx=0;iidx<4*DIM3;iidx++) |
| 469 | { |
| 470 | scratch[iidx] = 0.0; |
| 471 | } |
| 472 | |
| 473 | /* Start outer loop over neighborlists */ |
| 474 | for(iidx=0; iidx<nri; iidx++) |
| 475 | { |
| 476 | /* Load shift vector for this list */ |
| 477 | i_shift_offset = DIM3*shiftidx[iidx]; |
| 478 | |
| 479 | /* Load limits for loop over neighbors */ |
| 480 | j_index_start = jindex[iidx]; |
| 481 | j_index_end = jindex[iidx+1]; |
| 482 | |
| 483 | /* Get outer coordinate index */ |
| 484 | inr = iinr[iidx]; |
| 485 | i_coord_offset = DIM3*inr; |
| 486 | |
| 487 | /* Load i particle coords and add shift vector */ |
| 488 | gmx_mm_load_shift_and_1rvec_broadcast_ps(shiftvec+i_shift_offset,x+i_coord_offset,&ix0,&iy0,&iz0); |
| 489 | |
| 490 | fix0 = _mm_setzero_ps(); |
| 491 | fiy0 = _mm_setzero_ps(); |
| 492 | fiz0 = _mm_setzero_ps(); |
| 493 | |
| 494 | /* Load parameters for i particles */ |
| 495 | vdwioffset0 = 2*nvdwtype*vdwtype[inr+0]; |
| 496 | |
| 497 | /* Start inner kernel loop */ |
| 498 | for(jidx=j_index_start; jidx<j_index_end && jjnr[jidx+3]>=0; jidx+=4) |
| 499 | { |
| 500 | |
| 501 | /* Get j neighbor index, and coordinate index */ |
| 502 | jnrA = jjnr[jidx]; |
| 503 | jnrB = jjnr[jidx+1]; |
| 504 | jnrC = jjnr[jidx+2]; |
| 505 | jnrD = jjnr[jidx+3]; |
| 506 | j_coord_offsetA = DIM3*jnrA; |
| 507 | j_coord_offsetB = DIM3*jnrB; |
| 508 | j_coord_offsetC = DIM3*jnrC; |
| 509 | j_coord_offsetD = DIM3*jnrD; |
| 510 | |
| 511 | /* load j atom coordinates */ |
| 512 | gmx_mm_load_1rvec_4ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB, |
| 513 | x+j_coord_offsetC,x+j_coord_offsetD, |
| 514 | &jx0,&jy0,&jz0); |
| 515 | |
| 516 | /* Calculate displacement vector */ |
| 517 | dx00 = _mm_sub_ps(ix0,jx0); |
| 518 | dy00 = _mm_sub_ps(iy0,jy0); |
| 519 | dz00 = _mm_sub_ps(iz0,jz0); |
| 520 | |
| 521 | /* Calculate squared distance and things based on it */ |
| 522 | rsq00 = gmx_mm_calc_rsq_ps(dx00,dy00,dz00); |
| 523 | |
| 524 | rinv00 = gmx_mm_invsqrt_psgmx_simd_invsqrt_f(rsq00); |
| 525 | |
| 526 | rinvsq00 = _mm_mul_ps(rinv00,rinv00); |
| 527 | |
| 528 | /* Load parameters for j particles */ |
| 529 | vdwjidx0A = 2*vdwtype[jnrA+0]; |
| 530 | vdwjidx0B = 2*vdwtype[jnrB+0]; |
| 531 | vdwjidx0C = 2*vdwtype[jnrC+0]; |
| 532 | vdwjidx0D = 2*vdwtype[jnrD+0]; |
| 533 | |
| 534 | /************************** |
| 535 | * CALCULATE INTERACTIONS * |
| 536 | **************************/ |
| 537 | |
| 538 | r00 = _mm_mul_ps(rsq00,rinv00); |
| 539 | |
| 540 | /* Compute parameters for interactions between i and j atoms */ |
| 541 | gmx_mm_load_4pair_swizzle_ps(vdwparam+vdwioffset0+vdwjidx0A, |
| 542 | vdwparam+vdwioffset0+vdwjidx0B, |
| 543 | vdwparam+vdwioffset0+vdwjidx0C, |
| 544 | vdwparam+vdwioffset0+vdwjidx0D, |
| 545 | &c6_00,&c12_00); |
| 546 | |
| 547 | c6grid_00 = gmx_mm_load_4real_swizzle_ps(vdwgridparam+vdwioffset0+vdwjidx0A, |
| 548 | vdwgridparam+vdwioffset0+vdwjidx0B, |
| 549 | vdwgridparam+vdwioffset0+vdwjidx0C, |
| 550 | vdwgridparam+vdwioffset0+vdwjidx0D); |
| 551 | |
| 552 | /* Analytical LJ-PME */ |
| 553 | rinvsix = _mm_mul_ps(_mm_mul_ps(rinvsq00,rinvsq00),rinvsq00); |
| 554 | ewcljrsq = _mm_mul_ps(ewclj2,rsq00); |
| 555 | ewclj6 = _mm_mul_ps(ewclj2,_mm_mul_ps(ewclj2,ewclj2)); |
| 556 | exponent = gmx_simd_exp_rgmx_simd_exp_f(ewcljrsq); |
| 557 | /* poly = exp(-(beta*r)^2) * (1 + (beta*r)^2 + (beta*r)^4 /2) */ |
| 558 | poly = _mm_mul_ps(exponent,_mm_add_ps(_mm_sub_ps(one,ewcljrsq),_mm_mul_ps(_mm_mul_ps(ewcljrsq,ewcljrsq),one_half))); |
| 559 | /* f6A = 6 * C6grid * (1 - poly) */ |
| 560 | f6A = _mm_mul_ps(c6grid_00,_mm_sub_ps(one,poly)); |
| 561 | /* f6B = C6grid * exponent * beta^6 */ |
| 562 | f6B = _mm_mul_ps(_mm_mul_ps(c6grid_00,one_sixth),_mm_mul_ps(exponent,ewclj6)); |
| 563 | /* fvdw = 12*C12/r13 - ((6*C6 - f6A)/r6 + f6B)/r */ |
| 564 | fvdw = _mm_mul_ps(_mm_add_ps(_mm_mul_ps(_mm_sub_ps(_mm_mul_ps(c12_00,rinvsix),_mm_sub_ps(c6_00,f6A)),rinvsix),f6B),rinvsq00); |
| 565 | |
| 566 | fscal = fvdw; |
| 567 | |
| 568 | /* Calculate temporary vectorial force */ |
| 569 | tx = _mm_mul_ps(fscal,dx00); |
| 570 | ty = _mm_mul_ps(fscal,dy00); |
| 571 | tz = _mm_mul_ps(fscal,dz00); |
| 572 | |
| 573 | /* Update vectorial force */ |
| 574 | fix0 = _mm_add_ps(fix0,tx); |
| 575 | fiy0 = _mm_add_ps(fiy0,ty); |
| 576 | fiz0 = _mm_add_ps(fiz0,tz); |
| 577 | |
| 578 | fjptrA = f+j_coord_offsetA; |
| 579 | fjptrB = f+j_coord_offsetB; |
| 580 | fjptrC = f+j_coord_offsetC; |
| 581 | fjptrD = f+j_coord_offsetD; |
| 582 | gmx_mm_decrement_1rvec_4ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,tx,ty,tz); |
| 583 | |
| 584 | /* Inner loop uses 46 flops */ |
| 585 | } |
| 586 | |
| 587 | if(jidx<j_index_end) |
| 588 | { |
| 589 | |
| 590 | /* Get j neighbor index, and coordinate index */ |
| 591 | jnrlistA = jjnr[jidx]; |
| 592 | jnrlistB = jjnr[jidx+1]; |
| 593 | jnrlistC = jjnr[jidx+2]; |
| 594 | jnrlistD = jjnr[jidx+3]; |
| 595 | /* Sign of each element will be negative for non-real atoms. |
| 596 | * This mask will be 0xFFFFFFFF for dummy entries and 0x0 for real ones, |
| 597 | * so use it as val = _mm_andnot_ps(mask,val) to clear dummy entries. |
| 598 | */ |
| 599 | dummy_mask = gmx_mm_castsi128_ps_mm_castsi128_ps(_mm_cmplt_epi32(_mm_loadu_si128((const __m128i *)(jjnr+jidx)),_mm_setzero_si128())); |
| 600 | jnrA = (jnrlistA>=0) ? jnrlistA : 0; |
| 601 | jnrB = (jnrlistB>=0) ? jnrlistB : 0; |
| 602 | jnrC = (jnrlistC>=0) ? jnrlistC : 0; |
| 603 | jnrD = (jnrlistD>=0) ? jnrlistD : 0; |
| 604 | j_coord_offsetA = DIM3*jnrA; |
| 605 | j_coord_offsetB = DIM3*jnrB; |
| 606 | j_coord_offsetC = DIM3*jnrC; |
| 607 | j_coord_offsetD = DIM3*jnrD; |
| 608 | |
| 609 | /* load j atom coordinates */ |
| 610 | gmx_mm_load_1rvec_4ptr_swizzle_ps(x+j_coord_offsetA,x+j_coord_offsetB, |
| 611 | x+j_coord_offsetC,x+j_coord_offsetD, |
| 612 | &jx0,&jy0,&jz0); |
| 613 | |
| 614 | /* Calculate displacement vector */ |
| 615 | dx00 = _mm_sub_ps(ix0,jx0); |
| 616 | dy00 = _mm_sub_ps(iy0,jy0); |
| 617 | dz00 = _mm_sub_ps(iz0,jz0); |
| 618 | |
| 619 | /* Calculate squared distance and things based on it */ |
| 620 | rsq00 = gmx_mm_calc_rsq_ps(dx00,dy00,dz00); |
| 621 | |
| 622 | rinv00 = gmx_mm_invsqrt_psgmx_simd_invsqrt_f(rsq00); |
| 623 | |
| 624 | rinvsq00 = _mm_mul_ps(rinv00,rinv00); |
| 625 | |
| 626 | /* Load parameters for j particles */ |
| 627 | vdwjidx0A = 2*vdwtype[jnrA+0]; |
| 628 | vdwjidx0B = 2*vdwtype[jnrB+0]; |
| 629 | vdwjidx0C = 2*vdwtype[jnrC+0]; |
| 630 | vdwjidx0D = 2*vdwtype[jnrD+0]; |
| 631 | |
| 632 | /************************** |
| 633 | * CALCULATE INTERACTIONS * |
| 634 | **************************/ |
| 635 | |
| 636 | r00 = _mm_mul_ps(rsq00,rinv00); |
| 637 | r00 = _mm_andnot_ps(dummy_mask,r00); |
| 638 | |
| 639 | /* Compute parameters for interactions between i and j atoms */ |
| 640 | gmx_mm_load_4pair_swizzle_ps(vdwparam+vdwioffset0+vdwjidx0A, |
| 641 | vdwparam+vdwioffset0+vdwjidx0B, |
| 642 | vdwparam+vdwioffset0+vdwjidx0C, |
| 643 | vdwparam+vdwioffset0+vdwjidx0D, |
| 644 | &c6_00,&c12_00); |
| 645 | |
| 646 | c6grid_00 = gmx_mm_load_4real_swizzle_ps(vdwgridparam+vdwioffset0+vdwjidx0A, |
| 647 | vdwgridparam+vdwioffset0+vdwjidx0B, |
| 648 | vdwgridparam+vdwioffset0+vdwjidx0C, |
| 649 | vdwgridparam+vdwioffset0+vdwjidx0D); |
| 650 | |
| 651 | /* Analytical LJ-PME */ |
| 652 | rinvsix = _mm_mul_ps(_mm_mul_ps(rinvsq00,rinvsq00),rinvsq00); |
| 653 | ewcljrsq = _mm_mul_ps(ewclj2,rsq00); |
| 654 | ewclj6 = _mm_mul_ps(ewclj2,_mm_mul_ps(ewclj2,ewclj2)); |
| 655 | exponent = gmx_simd_exp_rgmx_simd_exp_f(ewcljrsq); |
| 656 | /* poly = exp(-(beta*r)^2) * (1 + (beta*r)^2 + (beta*r)^4 /2) */ |
| 657 | poly = _mm_mul_ps(exponent,_mm_add_ps(_mm_sub_ps(one,ewcljrsq),_mm_mul_ps(_mm_mul_ps(ewcljrsq,ewcljrsq),one_half))); |
| 658 | /* f6A = 6 * C6grid * (1 - poly) */ |
| 659 | f6A = _mm_mul_ps(c6grid_00,_mm_sub_ps(one,poly)); |
| 660 | /* f6B = C6grid * exponent * beta^6 */ |
| 661 | f6B = _mm_mul_ps(_mm_mul_ps(c6grid_00,one_sixth),_mm_mul_ps(exponent,ewclj6)); |
| 662 | /* fvdw = 12*C12/r13 - ((6*C6 - f6A)/r6 + f6B)/r */ |
| 663 | fvdw = _mm_mul_ps(_mm_add_ps(_mm_mul_ps(_mm_sub_ps(_mm_mul_ps(c12_00,rinvsix),_mm_sub_ps(c6_00,f6A)),rinvsix),f6B),rinvsq00); |
| 664 | |
| 665 | fscal = fvdw; |
| 666 | |
| 667 | fscal = _mm_andnot_ps(dummy_mask,fscal); |
| 668 | |
| 669 | /* Calculate temporary vectorial force */ |
| 670 | tx = _mm_mul_ps(fscal,dx00); |
| 671 | ty = _mm_mul_ps(fscal,dy00); |
| 672 | tz = _mm_mul_ps(fscal,dz00); |
| 673 | |
| 674 | /* Update vectorial force */ |
| 675 | fix0 = _mm_add_ps(fix0,tx); |
| 676 | fiy0 = _mm_add_ps(fiy0,ty); |
| 677 | fiz0 = _mm_add_ps(fiz0,tz); |
| 678 | |
| 679 | fjptrA = (jnrlistA>=0) ? f+j_coord_offsetA : scratch; |
| 680 | fjptrB = (jnrlistB>=0) ? f+j_coord_offsetB : scratch; |
| 681 | fjptrC = (jnrlistC>=0) ? f+j_coord_offsetC : scratch; |
| 682 | fjptrD = (jnrlistD>=0) ? f+j_coord_offsetD : scratch; |
| 683 | gmx_mm_decrement_1rvec_4ptr_swizzle_ps(fjptrA,fjptrB,fjptrC,fjptrD,tx,ty,tz); |
| 684 | |
| 685 | /* Inner loop uses 47 flops */ |
| 686 | } |
| 687 | |
| 688 | /* End of innermost loop */ |
| 689 | |
| 690 | gmx_mm_update_iforce_1atom_swizzle_ps(fix0,fiy0,fiz0, |
| 691 | f+i_coord_offset,fshift+i_shift_offset); |
| 692 | |
| 693 | /* Increment number of inner iterations */ |
| 694 | inneriter += j_index_end - j_index_start; |
| 695 | |
| 696 | /* Outer loop uses 6 flops */ |
| 697 | } |
| 698 | |
| 699 | /* Increment number of outer iterations */ |
| 700 | outeriter += nri; |
| 701 | |
| 702 | /* Update outer/inner flops */ |
| 703 | |
| 704 | inc_nrnb(nrnb,eNR_NBKERNEL_VDW_F,outeriter*6 + inneriter*47)(nrnb)->n[eNR_NBKERNEL_VDW_F] += outeriter*6 + inneriter*47; |
| 705 | } |