Add an optimized 32-bit implementation of the NIST P-256 elliptic curve.

mozilla/security/nss/lib/freebl/ecl/ecl-priv.h

Index: mozilla/security/nss/lib/freebl/ecl/ecl-priv.h
===================================================================
--- mozilla/security/nss/lib/freebl/ecl/ecl-priv.h	(revision 177437)
+++ mozilla/security/nss/lib/freebl/ecl/ecl-priv.h	(working copy)
@@ -236,6 +236,9 @@
 mp_err ec_group_set_gf2m193(ECGroup *group, ECCurveName name);
 mp_err ec_group_set_gf2m233(ECGroup *group, ECCurveName name);
 
+/* Optimized point multiplication */

[wtc, 2013/01/27 00:11:17]

agl: since your code is used to override these three methods:
base_point_mul, point_mul, points_mul
I am describing it as "optimized point multiplication" in
comments. I hope that is accurate.

+mp_err ec_group_set_gfp256_32(ECGroup *group, ECCurveName name);
+
 /* Optimized floating-point arithmetic */
 #ifdef ECL_USE_FP
 mp_err ec_group_set_secp160r1_fp(ECGroup *group);