dnl  ARM64 mpn_mul_1

dnl  Contributed to the GNU project by Torbjörn Granlund.

dnl  Copyright 2013 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')

C	     cycles/limb

C Cortex-A53	 ?

C Cortex-A57	 ?

define(`rp', `x0')

define(`up', `x1')

define(`n',  `x2')

define(`v0', `x3')

ASM_START()

PROLOGUE(mpn_mul_1)

	ldr	x12, [up], #8

	and	x6, n, #3

	and	n, n, #-4

	cbz	x6, L(fi0)

	cmp	x6, #2

	b.cc	L(fi1)

	b.eq	L(fi2)

L(fi3):	mul	x8, x12, v0

	umulh	x13, x12, v0

	cmn	xzr, xzr

	b	L(L3)

L(fi2):	mul	x7, x12, v0

	umulh	x5, x12, v0

	cmn	xzr, xzr

	b	L(L2)

L(fi0):	mul	x9, x12, v0

	umulh	x5, x12, v0

	sub	n, n, #4

	cmn	xzr, xzr

	b	L(L0)

L(fi1):	mul	x10, x12, v0

	umulh	x13, x12, v0

	cmn	xzr, xzr

	cbz	n, L(end)

L(top):	sub	n, n, #4

	ldr	x12, [up], #8

	mul	x6, x12, v0

	umulh	x5, x12, v0

	str	x10, [rp], #8

	adcs	x9, x6, x13

L(L0):	ldr	x12, [up], #8

	mul	x6, x12, v0

	umulh	x13, x12, v0

	str	x9, [rp] ,#8

	adcs	x8, x6, x5

L(L3):	ldr	x12, [up], #8

	mul	x6, x12, v0

	umulh	x5, x12, v0

	str	x8, [rp], #8

	adcs	x7, x6, x13

L(L2):	ldr	x12, [up], #8

	mul	x6, x12, v0

	umulh	x13, x12, v0

	str	x7, [rp], #8

	adcs	x10, x6, x5

	cbnz	n, L(top)

L(end):	str	x10, [rp]

	adc	x0, x13, xzr

	ret

EPILOGUE()