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diff --git a/gmp/mpn/ns32k/add_n.s b/gmp/mpn/ns32k/add_n.s
new file mode 100644
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+++ b/gmp/mpn/ns32k/add_n.s
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+# ns32000 __gmpn_add_n -- Add two limb vectors of the same length > 0 and store
+# sum in a third limb vector.
+
+# Copyright 1992, 1994, 2000 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 Lesser General Public License as published by
+# the Free Software Foundation; either version 3 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 Lesser General Public
+# License for more details.
+
+# You should have received a copy of the GNU Lesser General Public License
+# along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
+
+
+	.align 1
+.globl ___gmpn_add_n
+___gmpn_add_n:
+	save	[r3,r4,r5]
+	negd	28(sp),r3
+	movd	r3,r0
+	lshd	2,r0
+	movd	24(sp),r4
+	subd	r0,r4			# r4 -> to end of S2
+	movd	20(sp),r5
+	subd	r0,r5			# r5 -> to end of S1
+	movd	16(sp),r2
+	subd	r0,r2			# r2 -> to end of RES
+	subd	r0,r0			# cy = 0
+
+Loop:	movd	r5[r3:d],r0
+	addcd	r4[r3:d],r0
+	movd	r0,r2[r3:d]
+	acbd	1,r3,Loop
+
+	scsd	r0			# r0 = cy.
+	restore	[r5,r4,r3]
+	ret	0