1 files changed, 93 insertions, 0 deletions
diff --git a/sysdeps/sparc64/rshift.S b/sysdeps/sparc64/rshift.S
new file mode 100644
index 0000000000..e1b3aca112
--- /dev/null
+++ b/sysdeps/sparc64/rshift.S
@@ -0,0 +1,93 @@
+/* SPARC v9 __mpn_rshift --
+
+   Copyright (C) 1996 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., 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA.  */
+
+#include <sysdep.h>
+
+/* INPUT PARAMETERS
+   res_ptr	%i0
+   src_ptr	%i1
+   size		%i2
+   cnt		%i3  */
+
+ENTRY(__mpn_rshift)
+	save	%sp, -128, %sp
+
+	ldx	[%i1],%g2	! load first limb
+	sub	%g0,%i3,%i5	! negate shift count
+	add	%i2,-1,%i2
+	and	%i2,4-1,%l4	! number of limbs in first loop
+	sllx	%g2,%i5,%g1	! compute function result
+	brz,pn	%l4,.L0		! if multiple of 4 limbs, skip first loop
+	mov	%g1,%l1
+
+	sub	%i2,%l4,%i2	! adjust count for main loop
+
+.Loop0:	ldx	[%i1+8],%g3
+	add	%i0,8,%i0
+	add	%i1,8,%i1
+	add	%l4,-1,%l4
+	srlx	%g2,%i3,%i4
+	sllx	%g3,%i5,%g1
+	mov	%g3,%g2
+	or	%i4,%g1,%i4
+	brnz,pt	%l4,.Loop0
+	 stx	%i4,[%i0-8]
+
+.L0:	brz,pn	%i2,.Lend
+	 nop
+
+.Loop:	ldx	[%i1+8],%g3
+	add	%i0,32,%i0
+	add	%i2,-4,%i2
+	srlx	%g2,%i3,%i4
+	sllx	%g3,%i5,%g1
+
+	ldx	[%i1+16],%g2
+	srlx	%g3,%i3,%l4
+	or	%i4,%g1,%i4
+	stx	%i4,[%i0-32]
+	sllx	%g2,%i5,%g1
+
+	ldx	[%i1+24],%g3
+	srlx	%g2,%i3,%i4
+	or	%l4,%g1,%l4
+	stx	%l4,[%i0-24]
+	sllx	%g3,%i5,%g1
+
+	ldx	[%i1+32],%g2
+	srlx	%g3,%i3,%l4
+	or	%i4,%g1,%i4
+	stx	%i4,[%i0-16]
+	sllx	%g2,%i5,%g1
+
+	add	%i1,32,%i1
+	or	%l4,%g1,%l4
+	brnz	%i2,.Loop
+	 stx	%l4,[%i0-8]
+
+.Lend:	srlx	%g2,%i3,%g2
+	stx	%g2,[%i0-0]
+
+	mov	%l1,%i0
+	jmpl	%i7+8,%g0
+	 restore
+
+END(__mpn_rshift)