1 files changed, 94 insertions, 0 deletions
diff --git a/ports/sysdeps/mips/rshift.S b/ports/sysdeps/mips/rshift.S
new file mode 100644
index 0000000000..79b8bd73fc
--- /dev/null
+++ b/ports/sysdeps/mips/rshift.S
@@ -0,0 +1,94 @@
+/* MIPS2 __mpn_rshift --
+
+Copyright (C) 1995, 2000, 2002, 2003 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.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+/* INPUT PARAMETERS
+   res_ptr	$4
+   src_ptr	$5
+   size		$6
+   cnt		$7
+*/
+#ifdef __PIC__
+	.option pic2
+#endif
+ENTRY (__mpn_rshift)
+	.set	noreorder
+#ifdef __PIC__
+	.cpload t9
+#endif
+	.set	nomacro
+
+	lw	$10,0($5)	/* load first limb */
+	subu	$13,$0,$7
+	addiu	$6,$6,-1
+	and	$9,$6,4-1	/* number of limbs in first loop */
+	beq	$9,$0,L(L0)	/* if multiple of 4 limbs, skip first loop*/
+	 sll	$2,$10,$13	/* compute function result */
+
+	subu	$6,$6,$9
+
+L(Loop0):	lw	$3,4($5)
+	addiu	$4,$4,4
+	addiu	$5,$5,4
+	addiu	$9,$9,-1
+	srl	$11,$10,$7
+	sll	$12,$3,$13
+	move	$10,$3
+	or	$8,$11,$12
+	bne	$9,$0,L(Loop0)
+	 sw	$8,-4($4)
+
+L(L0):	beq	$6,$0,L(Lend)
+	 nop
+
+L(Loop):	lw	$3,4($5)
+	addiu	$4,$4,16
+	addiu	$6,$6,-4
+	srl	$11,$10,$7
+	sll	$12,$3,$13
+
+	lw	$10,8($5)
+	srl	$14,$3,$7
+	or	$8,$11,$12
+	sw	$8,-16($4)
+	sll	$9,$10,$13
+
+	lw	$3,12($5)
+	srl	$11,$10,$7
+	or	$8,$14,$9
+	sw	$8,-12($4)
+	sll	$12,$3,$13
+
+	lw	$10,16($5)
+	srl	$14,$3,$7
+	or	$8,$11,$12
+	sw	$8,-8($4)
+	sll	$9,$10,$13
+
+	addiu	$5,$5,16
+	or	$8,$14,$9
+	bgtz	$6,L(Loop)
+	 sw	$8,-4($4)
+
+L(Lend):	srl	$8,$10,$7
+	j	$31
+	sw	$8,0($4)
+	END (__mpn_rshift)