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diff --git a/rts/gmp/mpn/clipper/mul_1.s b/rts/gmp/mpn/clipper/mul_1.s
new file mode 100644
index 0000000..c0c7564
--- /dev/null
+++ b/rts/gmp/mpn/clipper/mul_1.s
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+; Clipper __gmpn_mul_1 -- Multiply a limb vector with a limb and store
+; the result in a second limb vector.
+
+; Copyright (C) 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 2.1 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; see the file COPYING.LIB.  If not, write to
+; the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+; MA 02111-1307, USA.
+
+.text
+	.align	16
+.globl	___gmpn_mul_1
+___gmpn_mul_1:
+	subq	$8,sp
+	storw	r6,(sp)
+	loadw	12(sp),r2
+	loadw	16(sp),r3
+	loadq	$0,r6		; clear carry limb
+
+.Loop:	loadw	(r1),r4
+	mulwux	r3,r4
+	addw	r6,r4		; add old carry limb into low product limb
+	loadq	$0,r6
+	addwc	r5,r6		; propagate cy into high product limb
+	storw	r4,(r0)
+	addq	$4,r0
+	addq	$4,r1
+	subq	$1,r2
+	brne	.Loop
+
+	movw	r6,r0
+	loadw	0(sp),r6
+	addq	$8,sp
+	ret	sp