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diff --git a/ports/sysdeps/m88k/m88110/mul_1.s b/ports/sysdeps/m88k/m88110/mul_1.s
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+; mc88110 __mpn_mul_1 -- Multiply a limb vector with a single limb and
+; store the product in a second limb vector.
+
+; Copyright (C) 1992, 1994, 1995 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.
+
+
+; INPUT PARAMETERS
+; res_ptr	r2
+; s1_ptr	r3
+; size		r4
+; s2_limb	r5
+
+	text
+	align	16
+	global	___mpn_mul_1
+___mpn_mul_1:
+	; Make S1_PTR and RES_PTR point at the end of their blocks
+	; and negate SIZE.
+	lda	 r3,r3[r4]
+	lda	 r8,r2[r4]		; RES_PTR in r8 since r2 is retval
+	subu	 r4,r0,r4
+
+	addu.co	 r2,r0,r0		; r2 = cy = 0
+
+	ld	 r6,r3[r4]
+	addu	 r4,r4,1
+	mulu.d	 r10,r6,r5
+	bcnd.n	 eq0,r4,Lend
+	 subu	 r8,r8,8
+
+Loop:	ld	 r6,r3[r4]
+	addu.cio r9,r11,r2
+	or	 r2,r10,r0		; could be avoided if unrolled
+	addu	 r4,r4,1
+	mulu.d	 r10,r6,r5
+	bcnd.n	 ne0,r4,Loop
+	 st	 r9,r8[r4]
+
+Lend:	addu.cio r9,r11,r2
+	st	 r9,r8,4
+	jmp.n	 r1
+	 addu.ci r2,r10,r0