pniels_t is now aligned to sizeof(big_register_t), clearing a MAGIC

src/decaf.c

@@ -47,7 +47,8 @@ extern const point_t API_NS(point_base);
 
 /* Projective Niels coordinates */
 typedef struct { gf a, b, c; } niels_s, niels_t[1];
-typedef struct { niels_t n; gf z; } __attribute__((aligned(32))) pniels_s, pniels_t[1]; /* MAGIC alignment */
+typedef struct { niels_t n; gf z; } __attribute__((aligned(sizeof(big_register_t))))
+    pniels_s, pniels_t[1];
 
 /* Precomputed base */
 struct precomputed_s { niels_t table [DECAF_COMBS_N<<(DECAF_COMBS_T-1)]; };
@@ -57,7 +58,7 @@ const precomputed_s *API_NS(precomputed_base) =
     (const precomputed_s *) &API_NS(precomputed_base_as_fe);
 
 const size_t API_NS2(sizeof,precomputed_s) = sizeof(precomputed_s);
-const size_t API_NS2(alignof,precomputed_s) = 32;
+const size_t API_NS2(alignof,precomputed_s) = sizeof(big_register_t);
 
 #define FOR_LIMB(i,op) { unsigned int i=0; for (i=0; i<NLIMBS; i++)  { op; }}
 #define FOR_LIMB_U(i,op) { unsigned int i=0; UNROLL for (i=0; i<NLIMBS; i++)  { op; }}