X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/898a4e2555438ff8adb08b4d82690d08715e1048..b817bfc642225b8c3c0b6a7e42d1fb949b61a606:/mp-modsqrt.c

diff --git a/mp-modsqrt.c b/mp-modsqrt.c
index df60aba..f9e4b0f 100644
--- a/mp-modsqrt.c
+++ b/mp-modsqrt.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: mp-modsqrt.c,v 1.4 2001/06/16 12:56:38 mdw Exp $
+ * $Id: mp-modsqrt.c,v 1.5 2004/04/08 01:36:15 mdw Exp $
  *
  * Compute square roots modulo a prime
  *
@@ -27,24 +27,6 @@
  * MA 02111-1307, USA.
  */
 
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: mp-modsqrt.c,v $
- * Revision 1.4  2001/06/16 12:56:38  mdw
- * Fixes for interface change to @mpmont_expr@ and @mpmont_mexpr@.
- *
- * Revision 1.3  2001/02/03 12:00:29  mdw
- * Now @mp_drop@ checks its argument is non-NULL before attempting to free
- * it.  Note that the macro version @MP_DROP@ doesn't do this.
- *
- * Revision 1.2  2000/10/08 12:02:21  mdw
- * Use @MP_EQ@ instead of @MP_CMP@.
- *
- * Revision 1.1  2000/06/22 19:01:31  mdw
- * Compute square roots in a prime field.
- *
- */
-
 /*----- Header files ------------------------------------------------------*/
 
 #include "fibrand.h"
@@ -103,8 +85,7 @@ mp *mp_modsqrt(mp *d, mp *a, mp *p)
 
   /* --- Find the inverse of %$a$% --- */
 
-  ainv = MP_NEW;
-  mp_gcd(0, &ainv, 0, a, p);
+  ainv = mp_modinv(MP_NEW, a, p);
   
   /* --- Split %$p - 1$% into a power of two and an odd number --- */