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diff --git a/sysdeps/hppa/sub_n.s b/sysdeps/hppa/sub_n.s
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+; HP-PA  __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
+; store difference in a third limb vector.
+
+; Copyright (C) 1992, 1994 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 Library General Public License as published by
+; the Free Software Foundation; either version 2 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 Library General Public
+; License for more details.
+
+; You should have received a copy of the GNU Library General Public License
+; along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+; INPUT PARAMETERS
+; res_ptr	gr26
+; s1_ptr	gr25
+; s2_ptr	gr24
+; size		gr23
+
+; One might want to unroll this as for other processors, but it turns
+; out that the data cache contention after a store makes such
+; unrolling useless.  We can't come under 5 cycles/limb anyway.
+
+	.code
+	.export		__mpn_sub_n
+__mpn_sub_n
+	.proc
+	.callinfo	frame=0,no_calls
+	.entry
+
+	ldws,ma		4(0,%r25),%r20
+	ldws,ma		4(0,%r24),%r19
+
+	addib,=		-1,%r23,L$end	; check for (SIZE == 1)
+	 sub		%r20,%r19,%r28	; subtract first limbs ignoring cy
+
+L$loop	ldws,ma		4(0,%r25),%r20
+	ldws,ma		4(0,%r24),%r19
+	stws,ma		%r28,4(0,%r26)
+	addib,<>	-1,%r23,L$loop
+	 subb		%r20,%r19,%r28
+
+L$end	stws		%r28,0(0,%r26)
+	addc		%r0,%r0,%r28
+	bv		0(%r2)
+	 subi		1,%r28,%r28
+
+	.exit
+	.procend