/* -*-c-*-
*
- * $Id: mp-modsqrt.c,v 1.3 2001/02/03 12:00:29 mdw Exp $
+ * $Id: mp-modsqrt.c,v 1.4 2001/06/16 12:56:38 mdw Exp $
*
* Compute square roots modulo a prime
*
/*----- 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.
/* --- Now to really get going --- */
mpmont_create(&mm, p);
+ b = mpmont_mul(&mm, b, b, mm.r2);
c = mpmont_expr(&mm, b, b, t);
t = mp_add(t, t, MP_ONE);
t = mp_lsr(t, t, 1);
- r = mpmont_expr(&mm, t, a, t);
+ dd = mpmont_mul(&mm, MP_NEW, a, mm.r2);
+ r = mpmont_expr(&mm, t, dd, t);
+ mp_drop(dd);
ainv = mpmont_mul(&mm, ainv, ainv, mm.r2);
mone = mp_sub(MP_NEW, p, mm.r);