Merge release-4-6 into master

[alexxy/gromacs.git] / src / gromacs / legacyheaders / types / nbnxn_pairlist.h

diff --git a/src/gromacs/legacyheaders/types/nbnxn_pairlist.h b/src/gromacs/legacyheaders/types/nbnxn_pairlist.h
index cd3240ea17bcf48d2b6b226ce66833b8b2a82f66..5639311cb882c9003f006ccfaeb676e3a3001e7f 100644 (file)
--- a/src/gromacs/legacyheaders/types/nbnxn_pairlist.h
+++ b/src/gromacs/legacyheaders/types/nbnxn_pairlist.h
@@ -216,7 +216,9 @@ typedef struct {
     real                    *nbfp;            /* Lennard-Jones 6*C6 and 12*C12 params, size ntype^2*2 */
     int                      comb_rule;       /* Combination rule, see enum above                   */
     real                    *nbfp_comb;       /* LJ parameter per atom type, size ntype*2           */
-    real                    *nbfp_s4;         /* As nbfp, but with stride 4, size ntype^2*4         */
+    real                    *nbfp_s4;         /* As nbfp, but with stride 4, size ntype^2*4. This
+                                               * might suit 4-wide SIMD loads of two values (e.g.
+                                               * two floats in single precision on x86).            */
     int                      natoms;          /* Number of atoms                                    */
     int                      natoms_local;    /* Number of local atoms                           */
     int                     *type;            /* Atom types                                         */