dnl  VAX mpn_sub_n -- Subtract two limb vectors of the same length > 0 and

dnl  store difference in a third limb vector.

dnl  Copyright 1999, 2000, 2012 Free Software Foundation, Inc.

dnl  This file is part of the GNU MP Library.

dnl

dnl  The GNU MP Library is free software; you can redistribute it and/or modify

dnl  it under the terms of either:

dnl

dnl    * the GNU Lesser General Public License as published by the Free

dnl      Software Foundation; either version 3 of the License, or (at your

dnl      option) any later version.

dnl

dnl  or

dnl

dnl    * the GNU General Public License as published by the Free Software

dnl      Foundation; either version 2 of the License, or (at your option) any

dnl      later version.

dnl

dnl  or both in parallel, as here.

dnl

dnl  The GNU MP Library is distributed in the hope that it will be useful, but

dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

dnl  for more details.

dnl

dnl  You should have received copies of the GNU General Public License and the

dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,

dnl  see https://www.gnu.org/licenses/.

include(`../config.m4')

ASM_START()

PROLOGUE(mpn_sub_n)

	.word	0x0

	movl	16(ap), r0

	movl	12(ap), r1

	movl	8(ap), r2

	movl	4(ap), r3

	mnegl	r0, r5

	addl2	$3, r0

	ashl	$-2, r0, r0	C unroll loop count

	bicl2	$-4, r5		C mask out low 2 bits

	movaq	(r5)[r5], r5	C 9x

	jmp	L(top)[r5]

L(top):	movl	(r2)+, r4

	sbwc	(r1)+, r4

	movl	r4, (r3)+

	movl	(r2)+, r4

	sbwc	(r1)+, r4

	movl	r4, (r3)+

	movl	(r2)+, r4

	sbwc	(r1)+, r4

	movl	r4, (r3)+

	movl	(r2)+, r4

	sbwc	(r1)+, r4

	movl	r4, (r3)+

	sobgtr	r0, L(top)

	adwc	r0, r0

	ret

EPILOGUE()