/usr/include/libint2/VRR_r12kg12_xs_xs.h is in libint2-dev 2.3.0~beta3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* This file is a part of Libint.
* Copyright (C) 2004-2014 Edward F. Valeev
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License, version 2,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
*/
#ifndef _libint2_src_lib_libint_vrrr12kg12xsxs_h_
#define _libint2_src_lib_libint_vrrr12kg12xsxs_h_
#include <cstdlib>
#include <libint2.h>
#include <util_types.h>
#include <libint2/cgshell_ordering.h>
namespace libint2 {
template <int part, int La, int Lc, int K, bool vectorize> struct VRR_r12kg12_xs_xs {
static void compute(const Libint_t* inteval,
LIBINT2_REALTYPE* target,
const LIBINT2_REALTYPE* src0,
const LIBINT2_REALTYPE* src1,
const LIBINT2_REALTYPE* src2,
const LIBINT2_REALTYPE* src3,
const LIBINT2_REALTYPE* src4,
const LIBINT2_REALTYPE* src5);
};
/** builds (a0| G_K |c0), where G_K = r12^K * G12, for K >= 0. For K == -1 use OSVRR (just make sure prefactors are modified accordingly).
src0 = (a-10|G_K|c0)
src1 = (a-20|G_K|c0)
src2 = (a-10|G_K|c-10)
src3 = (a0|G_K-2|c0)
src4 = (a-10|G_K-2|c+10)
src5 = (a-10|G_K-2|c0)
this code will also build (0a| G_K |0c) as long as the RR prefactors are defined appropriately.
**/
template <int La, int Lc, int K, bool vectorize> struct VRR_r12kg12_xs_xs<0,La,Lc,K,vectorize> {
static void compute(const Libint_t* inteval,
LIBINT2_REALTYPE* target,
const LIBINT2_REALTYPE* src0,
const LIBINT2_REALTYPE* src1,
const LIBINT2_REALTYPE* src2,
const LIBINT2_REALTYPE* src3,
const LIBINT2_REALTYPE* src4,
const LIBINT2_REALTYPE* src5) {
// works for (ds|ps) and higher, K >= 0
if ((La < 2 && Lc < 1) || K < 0)
abort();
const unsigned int veclen = vectorize ? inteval->veclen : 1;
const unsigned int Nc = INT_NCART(Lc);
const unsigned int NcV = Nc * veclen;
const unsigned int Ncm1 = INT_NCART(Lc-1);
const unsigned int Ncm1V = Ncm1 * veclen;
const unsigned int Ncp1 = INT_NCART(Lc+1);
const unsigned int Ncp1V = Ncp1 * veclen;
int ax, ay, az;
FOR_CART(ax, ay, az, La)
int a[3]; a[0] = ax; a[1] = ay; a[2] = az;
enum XYZ {x=0, y=1, z=2};
// Build along x, if possible
XYZ xyz = z;
if (ay != 0) xyz = y;
if (ax != 0) xyz = x;
--a[xyz];
// redirect
const LIBINT2_REALTYPE *pfac0_0, *pfac4_0;
switch(xyz) {
case x:
pfac0_0 = inteval->R12kG12_pfac0_0_x;
pfac4_0 = inteval->R12kG12_pfac4_0_x;
break;
case y:
pfac0_0 = inteval->R12kG12_pfac0_0_y;
pfac4_0 = inteval->R12kG12_pfac4_0_y;
break;
case z:
pfac0_0 = inteval->R12kG12_pfac0_0_z;
pfac4_0 = inteval->R12kG12_pfac4_0_z;
break;
}
const unsigned int iam1 = INT_CARTINDEX(La-1,a[0],a[1]);
const unsigned int am10c0_offset = iam1 * NcV;
const LIBINT2_REALTYPE* src0_ptr = src0 + am10c0_offset;
// if a-2_xyz exists, include (a-2_xyz 0 | c 0)
if (a[xyz] > 0) {
--a[xyz];
const unsigned int iam2 = INT_CARTINDEX(La-2,a[0],a[1]);
const unsigned int am20c0_offset = iam2 * NcV;
++a[xyz];
const LIBINT2_REALTYPE* src1_ptr = src1 + am20c0_offset;
const LIBINT2_REALTYPE axyz = (LIBINT2_REALTYPE)a[xyz];
unsigned int cv = 0;
for(unsigned int c = 0; c < Nc; ++c) {
for(unsigned int v=0; v<veclen; ++v, ++cv) {
target[cv] = pfac0_0[v] * src0_ptr[cv] + axyz * inteval->R12kG12_pfac1_0[v] * src1_ptr[cv];
}
}
#if LIBINT2_FLOP_COUNT
inteval->nflops[0] += 4 * NcV;
#endif
}
else {
unsigned int cv = 0;
for(unsigned int c = 0; c < Nc; ++c) {
for(unsigned int v=0; v<veclen; ++v, ++cv) {
target[cv] = pfac0_0[v] * src0_ptr[cv];
}
}
#if LIBINT2_FLOP_COUNT
inteval->nflops[0] += NcV;
#endif
}
{
const unsigned int am10cm10_offset = iam1 * Ncm1V;
const LIBINT2_REALTYPE* src2_ptr = src2 + am10cm10_offset;
// loop over c-1 shell and include (a-1_xyz 0 | c-1_xyz 0) to (a 0 | c 0)
int cx, cy, cz;
FOR_CART(cx, cy, cz, Lc-1)
int c[3]; c[0] = cx; c[1] = cy; c[2] = cz;
++c[xyz];
const unsigned int cc = INT_CARTINDEX(Lc,c[0],c[1]);
const unsigned int cc_offset = cc * veclen;
LIBINT2_REALTYPE* tptr = target + cc_offset;
const LIBINT2_REALTYPE cxyz = (LIBINT2_REALTYPE)c[xyz];
for(unsigned int v=0; v<veclen; ++v) {
tptr[v] += cxyz * inteval->R12kG12_pfac2[v] * src2_ptr[v];
}
#if LIBINT2_FLOP_COUNT
inteval->nflops[0] += 3 * veclen;
#endif
src2_ptr += veclen;
END_FOR_CART
}
if (K > 0) {
++a[xyz];
const unsigned int ia = INT_CARTINDEX(La,a[0],a[1]);
const unsigned int a0c0_offset = ia * NcV;
--a[xyz];
const LIBINT2_REALTYPE* src3_ptr = src3 + a0c0_offset;
const LIBINT2_REALTYPE* src5_ptr = src5 + am10c0_offset;
unsigned int cv = 0;
for(unsigned int c = 0; c < Nc; ++c) {
for(unsigned int v=0; v<veclen; ++v, ++cv) {
target[cv] += K * inteval->R12kG12_pfac3_0[v] * (src3_ptr[cv] + pfac4_0[v] * src5_ptr[cv]);
}
}
#if LIBINT2_FLOP_COUNT
inteval->nflops[0] += 5 * NcV;
#endif
// loop over c shell and include (a-1_xyz 0 | c+1_xyz 0) to (a 0 | c 0)
int cx, cy, cz;
cv = 0;
const unsigned int am10cp10_offset = iam1 * Ncp1V;
const LIBINT2_REALTYPE* src4_ptr0 = src4 + am10cp10_offset;
FOR_CART(cx, cy, cz, Lc)
int c[3]; c[0] = cx; c[1] = cy; c[2] = cz;
++c[xyz];
const unsigned int cc = INT_CARTINDEX(Lc+1,c[0],c[1]);
const unsigned int cc_offset = cc * veclen;
const LIBINT2_REALTYPE* src4_ptr = src4_ptr0 + cc_offset;
for(unsigned int v=0; v<veclen; ++v, ++cv) {
target[cv] -= K * inteval->R12kG12_pfac3_0[v] * src4_ptr[v];
}
#if LIBINT2_FLOP_COUNT
inteval->nflops[0] += 3 * veclen;
#endif
END_FOR_CART
}
target += NcV;
END_FOR_CART
/** Number of flops = ??? */
//inteval->nflops[0] = inteval->nflops[0] + 222 * 1 * 1 * veclen;
}
};
};
#endif // header guard
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