/* MIPS2 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and

store difference in a third limb vector.

Copyright (C) 1995-2018 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

   s1_ptr	$5

   s2_ptr	$6

   size		$7

*/

#ifdef __PIC__

	.option pic2

#endif

ENTRY (__mpn_sub_n)

	.set	noreorder

#ifdef __PIC__

	.cpload t9

#endif

	.set	nomacro

	lw	$10,0($5)

	lw	$11,0($6)

	addiu	$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

	subu	$7,$7,$9

L(Loop0):	addiu	$9,$9,-1

	lw	$12,4($5)

	addu	$11,$11,$2

	lw	$13,4($6)

	sltu	$8,$11,$2

	subu	$11,$10,$11

	sltu	$2,$10,$11

	sw	$11,0($4)

	or	$2,$2,$8

	addiu	$5,$5,4

	addiu	$6,$6,4

	move	$10,$12

	move	$11,$13

	bne	$9,$0,L(Loop0)

	addiu	$4,$4,4

L(L0):	beq	$7,$0,L(Lend)

	nop

L(Loop):	addiu	$7,$7,-4

	lw	$12,4($5)

	addu	$11,$11,$2

	lw	$13,4($6)

	sltu	$8,$11,$2

	subu	$11,$10,$11

	sltu	$2,$10,$11

	sw	$11,0($4)

	or	$2,$2,$8

	lw	$10,8($5)

	addu	$13,$13,$2

	lw	$11,8($6)

	sltu	$8,$13,$2

	subu	$13,$12,$13

	sltu	$2,$12,$13

	sw	$13,4($4)

	or	$2,$2,$8

	lw	$12,12($5)

	addu	$11,$11,$2

	lw	$13,12($6)

	sltu	$8,$11,$2

	subu	$11,$10,$11

	sltu	$2,$10,$11

	sw	$11,8($4)

	or	$2,$2,$8

	lw	$10,16($5)

	addu	$13,$13,$2

	lw	$11,16($6)

	sltu	$8,$13,$2

	subu	$13,$12,$13

	sltu	$2,$12,$13

	sw	$13,12($4)

	or	$2,$2,$8

	addiu	$5,$5,16

	addiu	$6,$6,16

	bne	$7,$0,L(Loop)

	addiu	$4,$4,16

L(Lend):	addu	$11,$11,$2

	sltu	$8,$11,$2

	subu	$11,$10,$11

	sltu	$2,$10,$11

	sw	$11,0($4)

	j	$31

	or	$2,$2,$8

	END (__mpn_sub_n)