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diff --git a/gmp/mpn/i960/addmul_1.s b/gmp/mpn/i960/addmul_1.s
new file mode 100644
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+++ b/gmp/mpn/i960/addmul_1.s
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+# I960 __gmpn_addmul_1 -- Multiply a limb vector with a limb and add
+# the result to a second limb vector.
+
+# Copyright 1995, 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/.
+
+.text
+	.align	4
+	.globl	___gmpn_mul_1
+___gmpn_mul_1:
+	subo	g2,0,g2
+	shlo	2,g2,g4
+	subo	g4,g1,g1
+	subo	g4,g0,g13
+	mov	0,g0
+
+	cmpo	1,0		# clear C bit on AC.cc
+
+Loop:	ld	(g1)[g2*4],g5
+	emul	g3,g5,g6
+	ld	(g13)[g2*4],g5
+
+	addc	g0,g6,g6	# relies on that C bit is clear
+	addc	0,g7,g7
+	addc	g5,g6,g6	# relies on that C bit is clear
+	st	g6,(g13)[g2*4]
+	addc	0,g7,g0
+
+	addo	g2,1,g2
+	cmpobne	0,g2,Loop	# when branch is taken, clears C bit
+
+	ret