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diff --git a/rts/gmp/mpn/vax/rshift.s b/rts/gmp/mpn/vax/rshift.s
new file mode 100644
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+++ b/rts/gmp/mpn/vax/rshift.s
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+# VAX __gmpn_rshift -- right shift.
+
+# Copyright (C) 1999, 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.
+
+
+# INPUT PARAMETERS
+# rptr		(sp + 4)
+# sptr		(sp + 8)
+# size		(sp + 12)
+# cnt		(sp + 16)
+# r0=retval r1=size r2,r3=itmp r4,r5=otmp	call-used registers
+# r6=sptr r7=rptr r8=cnt r9 r10 r11		call-saved registers
+
+.text
+	.align 1
+.globl ___gmpn_rshift
+___gmpn_rshift:
+	.word	0x1c0
+	movl	4(ap),r7
+	movl	8(ap),r6
+	movl	12(ap),r1
+	movl	16(ap),r8
+
+	movl	(r6)+,r2
+	subl3	r8,$32,r8
+	ashl	r8,r2,r0
+	decl	r1
+	jeql	Lend
+
+Loop:	movl	(r6)+,r3
+	ashq	r8,r2,r4
+	movl	r5,(r7)+
+	movl	r3,r2
+	jsobgtr	r1,Loop
+
+Lend:	clrl	r3
+	ashq	r8,r2,r4
+	movl	r5,(r7)
+	ret