--- /dev/null
+; HP-PA __mpn_add_n -- Add two limb vectors of the same length > 0 and store
+; sum in a third limb vector.
+; This is optimized for the PA7100, where is runs at 4.25 cycles/limb
+
+; Copyright (C) 1992, 1994 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.
+
+
+; INPUT PARAMETERS
+; res_ptr gr26
+; s1_ptr gr25
+; s2_ptr gr24
+; size gr23
+
+ .code
+ .export __mpn_add_n
+__mpn_add_n
+ .proc
+ .callinfo frame=0,no_calls
+ .entry
+
+ ldws,ma 4(0,%r25),%r20
+ ldws,ma 4(0,%r24),%r19
+
+ addib,<= -5,%r23,L$rest
+ add %r20,%r19,%r28 ; add first limbs ignoring cy
+
+L$loop ldws,ma 4(0,%r25),%r20
+ ldws,ma 4(0,%r24),%r19
+ stws,ma %r28,4(0,%r26)
+ addc %r20,%r19,%r28
+ ldws,ma 4(0,%r25),%r20
+ ldws,ma 4(0,%r24),%r19
+ stws,ma %r28,4(0,%r26)
+ addc %r20,%r19,%r28
+ ldws,ma 4(0,%r25),%r20
+ ldws,ma 4(0,%r24),%r19
+ stws,ma %r28,4(0,%r26)
+ addc %r20,%r19,%r28
+ ldws,ma 4(0,%r25),%r20
+ ldws,ma 4(0,%r24),%r19
+ stws,ma %r28,4(0,%r26)
+ addib,> -4,%r23,L$loop
+ addc %r20,%r19,%r28
+
+L$rest addib,= 4,%r23,L$end
+ nop
+L$eloop ldws,ma 4(0,%r25),%r20
+ ldws,ma 4(0,%r24),%r19
+ stws,ma %r28,4(0,%r26)
+ addib,> -1,%r23,L$eloop
+ addc %r20,%r19,%r28
+
+L$end stws %r28,0(0,%r26)
+ bv 0(%r2)
+ addc %r0,%r0,%r28
+
+ .exit
+ .procend