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+/* SPARC v9 __mpn_add_n -- Add two limb vectors of the same length > 0 and
+ store sum in a third limb vector.
+
+ Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+
+ This file is part of the GNU MP Library.
+
+ The GNU MP Library is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Library General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or (at your
+ option) any later version.
+
+ The GNU MP Library is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
+ License for more details.
+
+ You should have received a copy of the GNU Library General Public License
+ along with the GNU MP Library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ MA 02111-1307, USA. */
+
+
+#include <sysdep.h>
+
+
+/* INPUT PARAMETERS
+ res_ptr %o0
+ s1_ptr %o1
+ s2_ptr %o2
+ size %o3 */
+
+
+ENTRY(__mpn_add_n)
+
+ sub %g0,%o3,%g3
+ sllx %o3,3,%g1
+ add %o1,%g1,%o1 ! make s1_ptr point at end
+ add %o2,%g1,%o2 ! make s2_ptr point at end
+ add %o0,%g1,%o0 ! make res_ptr point at end
+ mov 0,%o4 ! clear carry variable
+ sllx %g3,3,%o5 ! compute initial address index
+
+1: ldx [%o2+%o5],%g1 ! load s2 limb
+ add %g3,1,%g3 ! increment loop count
+ ldx [%o1+%o5],%g2 ! load s1 limb
+ addcc %g1,%o4,%g1 ! add s2 limb and carry variable
+ movcc %xcc,0,%o4 ! if carry-out, o4 was 1; clear it
+ addcc %g1,%g2,%g1 ! add s1 limb to sum
+ stx %g1,[%o0+%o5] ! store result
+ add %o5,8,%o5 ! increment address index
+ brnz,pt %g3,1b
+ movcs %xcc,1,%o4 ! if s1 add gave carry, record it
+
+ retl
+ mov %o4,%o0
+
+END(__mpn_add_n)