#include "libsecp256k1-config.h"
#endif
-#if defined(USE_FIELD_10X26)
-#include "field_10x26.h"
-#elif defined(USE_FIELD_5X52)
+#include "util.h"
+
+#if defined(SECP256K1_WIDEMUL_INT128)
#include "field_5x52.h"
+#elif defined(SECP256K1_WIDEMUL_INT64)
+#include "field_10x26.h"
#else
-#error "Please select field implementation"
+#error "Please select wide multiplication implementation"
#endif
-#include "util.h"
-
-/** Normalize a field element. */
+/** Normalize a field element. This brings the field element to a canonical representation, reduces
+ * its magnitude to 1, and reduces it modulo field size `p`.
+ */
static void secp256k1_fe_normalize(secp256k1_fe *r);
-/** Weakly normalize a field element: reduce it magnitude to 1, but don't fully normalize. */
+/** Weakly normalize a field element: reduce its magnitude to 1, but don't fully normalize. */
static void secp256k1_fe_normalize_weak(secp256k1_fe *r);
/** Normalize a field element, without constant-time guarantee. */
/** Convert a field element back from the storage type. */
static void secp256k1_fe_from_storage(secp256k1_fe *r, const secp256k1_fe_storage *a);
-/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. */
+/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. Both *r and *a must be initialized.*/
static void secp256k1_fe_storage_cmov(secp256k1_fe_storage *r, const secp256k1_fe_storage *a, int flag);
-/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. */
+/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. Both *r and *a must be initialized.*/
static void secp256k1_fe_cmov(secp256k1_fe *r, const secp256k1_fe *a, int flag);
#endif /* SECP256K1_FIELD_H */