1 files changed, 104 insertions, 0 deletions
diff --git a/ports/sysdeps/mips/mips64/lshift.S b/ports/sysdeps/mips/mips64/lshift.S
new file mode 100644
index 0000000000..52783f8cd0
--- /dev/null
+++ b/ports/sysdeps/mips/mips64/lshift.S
@@ -0,0 +1,104 @@
+/* MIPS3 __mpn_lshift --
+ *
+ * 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>
+#include <sys/asm.h>
+
+/* INPUT PARAMETERS
+ * res_ptr	$4
+ * src_ptr	$5
+ * size		$6
+ * cnt		$7
+ */
+
+#ifdef __PIC__
+	.option pic2
+#endif
+	.text
+	.align	2
+	.globl	__mpn_lshift
+	.ent	__mpn_lshift
+__mpn_lshift:
+#ifdef __PIC__
+	SETUP_GP /* ??? unused */
+#endif
+	.set	noreorder
+	.set	nomacro
+
+	dsll	$2,$6,3
+	daddu	$5,$5,$2	# make r5 point at end of src
+	ld	$10,-8($5)	# load first limb
+	dsubu	$13,$0,$7
+	daddu	$4,$4,$2	# make r4 point at end of res
+	daddiu	$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
+	dsrl	$2,$10,$13	# compute function result
+
+	dsubu	$6,$6,$9
+
+L(Loop0):	ld	$3,-16($5)
+	daddiu	$4,$4,-8
+	daddiu	$5,$5,-8
+	daddiu	$9,$9,-1
+	dsll	$11,$10,$7
+	dsrl	$12,$3,$13
+	move	$10,$3
+	or	$8,$11,$12
+	bne	$9,$0,L(Loop0)
+	sd	$8,0($4)
+
+L(L0):	beq	$6,$0,L(Lend)
+	nop
+
+L(Loop):	ld	$3,-16($5)
+	daddiu	$4,$4,-32
+	daddiu	$6,$6,-4
+	dsll	$11,$10,$7
+	dsrl	$12,$3,$13
+
+	ld	$10,-24($5)
+	dsll	$14,$3,$7
+	or	$8,$11,$12
+	sd	$8,24($4)
+	dsrl	$9,$10,$13
+
+	ld	$3,-32($5)
+	dsll	$11,$10,$7
+	or	$8,$14,$9
+	sd	$8,16($4)
+	dsrl	$12,$3,$13
+
+	ld	$10,-40($5)
+	dsll	$14,$3,$7
+	or	$8,$11,$12
+	sd	$8,8($4)
+	dsrl	$9,$10,$13
+
+	daddiu	$5,$5,-32
+	or	$8,$14,$9
+	bgtz	$6,L(Loop)
+	sd	$8,0($4)
+
+L(Lend):	dsll	$8,$10,$7
+	j	$31
+	sd	$8,-8($4)
+	.end	__mpn_lshift