1 files changed, 28 insertions, 1 deletions

diff --git a/src/coord.c b/src/coord.c
index 8c978bc..a53dacc 100644
--- a/src/coord.c
+++ b/src/coord.c
@@ -153,7 +153,13 @@ coord_drud_eofb = {
 static Cube
 antindex_eofb(uint64_t ind)
 {
-        return (Cube){ .eofb = ind, .eorl = ind, .eoud = ind };
+        Cube ret = {0};
+
+        ret.eofb = ind;
+        ret.eorl = ind;
+        ret.eoud = ind;
+
+        return ret;
 }
 
 static Cube
@@ -161,8 +167,29 @@ antindex_eofbepos(uint64_t ind)
 {
         Cube ret = {0};
 
+        /* We need eorl for sym16 coordinate */
+        static int initialized = false;
+        static uint64_t eorl_aux[POW2TO11][BINOM12ON4];
+        static int eo_aux[12], ep_aux[12];
+        unsigned int i, j, k;
+
+        if (!initialized) {
+                for (i = 0; i < POW2TO11; i++) {
+                        for (j = 0; j < BINOM12ON4; j++) {
+                                int_to_sum_zero_array(i, 2, 12, eo_aux);
+                                index_to_subset(j, 12, 4, ep_aux);
+                                for (k = 0; k < 12; k++)
+                                        if (ep_aux[k])
+                                                eo_aux[k] = 1 - eo_aux[k];
+                        }
+                }
+
+                initialized = true;
+        }
+
         ret.eofb = ind % POW2TO11;
         ret.epose = (ind / POW2TO11) * 24;
+        ret.eorl = eorl_aux[ret.eofb][ret.epose/24];
 
         return ret;
 }