--- a/libtommath/bn_mp_reduce_is_2k_l.c	Wed Feb 28 22:11:39 2018 +0800
+++ b/libtommath/bn_mp_reduce_is_2k_l.c	Thu Oct 15 19:55:15 2020 +0800
@@ -1,25 +1,13 @@
-#include <tommath_private.h>
+#include "tommath_private.h"
 #ifdef BN_MP_REDUCE_IS_2K_L_C
-/* LibTomMath, multiple-precision integer library -- Tom St Denis
- *
- * LibTomMath is a library that provides multiple-precision
- * integer arithmetic as well as number theoretic functionality.
- *
- * The library was designed directly after the MPI library by
- * Michael Fromberger but has been written from scratch with
- * additional optimizations in place.
- *
- * The library is free for all purposes without any express
- * guarantee it works.
- *
- * Tom St Denis, [email protected], http://libtom.org
- */
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
 
 /* determines if reduce_2k_l can be used */
-int mp_reduce_is_2k_l(mp_int *a)
+mp_bool mp_reduce_is_2k_l(const mp_int *a)
 {
    int ix, iy;
-   
+
    if (a->used == 0) {
       return MP_NO;
    } else if (a->used == 1) {
@@ -27,18 +15,14 @@
    } else if (a->used > 1) {
       /* if more than half of the digits are -1 we're sold */
       for (iy = ix = 0; ix < a->used; ix++) {
-          if (a->dp[ix] == MP_MASK) {
-              ++iy;
-          }
+         if (a->dp[ix] == MP_DIGIT_MAX) {
+            ++iy;
+         }
       }
       return (iy >= (a->used/2)) ? MP_YES : MP_NO;
-      
+   } else {
+      return MP_NO;
    }
-   return MP_NO;
 }
 
 #endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */