1 files changed, 125 insertions, 0 deletions
diff --git a/sysdeps/mips/mips64/sub_n.S b/sysdeps/mips/mips64/sub_n.S
new file mode 100644
index 0000000000..23322481de
--- /dev/null
+++ b/sysdeps/mips/mips64/sub_n.S
@@ -0,0 +1,125 @@
+/* MIPS3 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
+ * store difference in a third limb vector.
+ *
+ * Copyright (C) 1995-2014 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
+ * s1_ptr	$5
+ * s2_ptr	$6
+ * size		$7
+ */
+
+#ifdef __PIC__
+	.option pic2
+#endif
+ENTRY (__mpn_sub_n)
+#ifdef __PIC__
+	SETUP_GP /* ??? unused */
+#endif
+	.set	noreorder
+	.set	nomacro
+
+	ld	$10,0($5)
+	ld	$11,0($6)
+
+	daddiu	$7,$7,-1
+	and	$9,$7,4-1	# number of limbs in first loop
+	beq	$9,$0,L(L0)	# if multiple of 4 limbs, skip first loop
+	move	$2,$0
+
+	dsubu	$7,$7,$9
+
+L(Loop0):	daddiu	$9,$9,-1
+	ld	$12,8($5)
+	daddu	$11,$11,$2
+	ld	$13,8($6)
+	sltu	$8,$11,$2
+	dsubu	$11,$10,$11
+	sltu	$2,$10,$11
+	sd	$11,0($4)
+	or	$2,$2,$8
+
+	daddiu	$5,$5,8
+	daddiu	$6,$6,8
+	move	$10,$12
+	move	$11,$13
+	bne	$9,$0,L(Loop0)
+	daddiu	$4,$4,8
+
+L(L0):	beq	$7,$0,L(Lend)
+	nop
+
+L(Loop):	daddiu	$7,$7,-4
+
+	ld	$12,8($5)
+	daddu	$11,$11,$2
+	ld	$13,8($6)
+	sltu	$8,$11,$2
+	dsubu	$11,$10,$11
+	sltu	$2,$10,$11
+	sd	$11,0($4)
+	or	$2,$2,$8
+
+	ld	$10,16($5)
+	daddu	$13,$13,$2
+	ld	$11,16($6)
+	sltu	$8,$13,$2
+	dsubu	$13,$12,$13
+	sltu	$2,$12,$13
+	sd	$13,8($4)
+	or	$2,$2,$8
+
+	ld	$12,24($5)
+	daddu	$11,$11,$2
+	ld	$13,24($6)
+	sltu	$8,$11,$2
+	dsubu	$11,$10,$11
+	sltu	$2,$10,$11
+	sd	$11,16($4)
+	or	$2,$2,$8
+
+	ld	$10,32($5)
+	daddu	$13,$13,$2
+	ld	$11,32($6)
+	sltu	$8,$13,$2
+	dsubu	$13,$12,$13
+	sltu	$2,$12,$13
+	sd	$13,24($4)
+	or	$2,$2,$8
+
+	daddiu	$5,$5,32
+	daddiu	$6,$6,32
+
+	bne	$7,$0,L(Loop)
+	daddiu	$4,$4,32
+
+L(Lend):	daddu	$11,$11,$2
+	sltu	$8,$11,$2
+	dsubu	$11,$10,$11
+	sltu	$2,$10,$11
+	sd	$11,0($4)
+	j	$31
+	or	$2,$2,$8
+
+END (__mpn_sub_n)