1 files changed, 59 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/hppa/sub_n.S b/libc/sysdeps/linux/hppa/sub_n.S
new file mode 100644
index 000000000..7764961a2
--- /dev/null
+++ b/libc/sysdeps/linux/hppa/sub_n.S
@@ -0,0 +1,59 @@
+;! 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 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	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.
+
+	.text
+	.export		__mpn_sub_n
+__mpn_sub_n:
+	.proc
+	.callinfo	frame=0,no_calls
+	.entry
+
+	ldws,ma		4(%r25),%r21
+	ldws,ma		4(%r24),%r20
+
+	addib,=		-1,%r23,L$end	;! check for (SIZE == 1)
+	 sub		%r21,%r20,%r28	;! subtract first limbs ignoring cy
+
+L$loop:	ldws,ma		4(%r25),%r21
+	ldws,ma		4(%r24),%r20
+	stws,ma		%r28,4(%r26)
+	addib,<>	-1,%r23,L$loop
+	 subb		%r21,%r20,%r28
+
+L$end:	stws		%r28,0(%r26)
+	addc		%r0,%r0,%r28
+	bv		0(%r2)
+	 subi		1,%r28,%r28
+
+	.exit
+	.procend