1 files changed, 29 insertions, 7 deletions

diff --git a/src/cube_portable.h b/src/cube_portable.h
index fcd1d55..125c300 100644
--- a/src/cube_portable.h
+++ b/src/cube_portable.h
@@ -17,9 +17,12 @@ _static_inline int64_t coord_fast_co(cube_fast_t);
 _static_inline int64_t coord_fast_csep(cube_fast_t);
 _static_inline int64_t coord_fast_cocsep(cube_fast_t);
 _static_inline int64_t coord_fast_eo(cube_fast_t);
-_static_inline void set_eo_fast(cube_fast_t *, int64_t eo);
 _static_inline int64_t coord_fast_esep(cube_fast_t);
 
+_static_inline void copy_corners_fast(cube_fast_t *, cube_fast_t);
+_static_inline void copy_edges_fast(cube_fast_t *, cube_fast_t);
+_static_inline void set_eo_fast(cube_fast_t *, int64_t);
+
 _static_inline cube_fast_t
 fastcube(
         uint8_t c_ufr,
@@ -189,12 +192,6 @@ coord_fast_eo(cube_fast_t c)
         return ret;
 }
 
-_static_inline void
-_set_eo_fast(cube_fast_t *cube, int64_t eo)
-{
-        /* TODO */
-}
-
 /*
 We encode the edge separation as a number from 0 to C(12,4)*C(8,4).
 It can be seen as the composition of two "subset index" coordinates.
@@ -229,3 +226,28 @@ coord_fast_esep(cube_fast_t c)
 
         return ret1 * 70 + ret2;
 }
+
+_static_inline void
+copy_corners_fast(cube_fast_t *dest, cube_fast_t src)
+{
+        memcpy(&dest->corner, src.corner, sizeof(src.corner));
+}
+
+_static_inline void
+copy_edges_fast(cube_fast_t *dest, cube_fast_t src)
+{
+        memcpy(&dest->edge, src.edge, sizeof(src.edge));
+}
+
+_static_inline void
+set_eo_fast(cube_fast_t *cube, int64_t eo)
+{
+        int i, sum, flip;
+
+        for (sum = 0, i = 1; i < 12; i++, eo >>= 1) {
+                flip = eo % 2;
+                sum += flip;
+                cube->edge[i] = (cube->edge[i] & ~_eobit) | (_eobit * flip);
+        }
+        cube->edge[0] = (cube->edge[0] & ~_eobit) | (_eobit * (sum%2));
+}