dnl  SPARC v9 mpn_sec_tabselect.

dnl  Contributed to the GNU project by Torbjörn Granlund and David Miller.

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 UltraSPARC 1&2:	 2 hopefully

C UltraSPARC 3:		 3

C UltraSPARC T1:	17

C UltraSPARC T3:	 ?

C UltraSPARC T4/T5:	 2.25 hopefully

C INPUT PARAMETERS

define(`rp',     `%i0')

define(`tp',     `%i1')

define(`n',      `%i2')

define(`nents',  `%i3')

define(`which',  `%i4')

define(`i',      `%g1')

define(`j',      `%g3')

define(`stride', `%g4')

define(`tporig', `%g5')

define(`mask',   `%o0')

define(`data0',  `%l0')

define(`data1',  `%l1')

define(`data2',  `%l2')

define(`data3',  `%l3')

define(`t0',     `%l4')

define(`t1',     `%l5')

define(`t2',     `%l6')

define(`t3',     `%l7')

ASM_START()

	REGISTER(%g2,#scratch)

	REGISTER(%g3,#scratch)

PROLOGUE(mpn_sec_tabselect)

	save	%sp, -176, %sp

	sllx	n, 3, stride

	sub	n, 4, j

	brlz	j, L(outer_end)

	 mov	tp, tporig

L(outer_loop):

	clr	data0

	clr	data1

	clr	data2

	clr	data3

	mov	tporig, tp

	mov	nents, i

	mov	which, %o1

L(top):	subcc	%o1, 1, %o1		C set carry iff o1 = 0

	ldx	[tp + 0], t0

	subc	%g0, %g0, mask

	ldx	[tp + 8], t1

	sub	i, 1, i

	ldx	[tp + 16], t2

	ldx	[tp + 24], t3

	add	tp, stride, tp

	and	t0, mask, t0

	and	t1, mask, t1

	or	t0, data0, data0

	and	t2, mask, t2

	or	t1, data1, data1

	and	t3, mask, t3

	or	t2, data2, data2

	brnz	i, L(top)

	 or	t3, data3, data3

	stx	data0, [rp + 0]

	subcc	j, 4, j

	stx	data1, [rp + 8]

	stx	data2, [rp + 16]

	stx	data3, [rp + 24]

	add	tporig, (4 * 8), tporig

	brgez	j, L(outer_loop)

	 add	rp, (4 * 8), rp

L(outer_end):

	andcc	n, 2, %g0

	be	L(b0x)

	 nop

L(b1x):	clr	data0

	clr	data1

	mov	tporig, tp

	mov	nents, i

	mov	which, %o1

L(tp2):	subcc	%o1, 1, %o1

	ldx	[tp + 0], t0

	subc	%g0, %g0, mask

	ldx	[tp + 8], t1

	sub	i, 1, i

	add	tp, stride, tp

	and	t0, mask, t0

	and	t1, mask, t1

	or	t0, data0, data0

	brnz	i, L(tp2)

	 or	t1, data1, data1

	stx	data0, [rp + 0]

	stx	data1, [rp + 8]

	add	tporig, (2 * 8), tporig

	add	rp, (2 * 8), rp

L(b0x):	andcc	n, 1, %g0

	be	L(b00)

	 nop

L(b01):	clr	data0

	mov	tporig, tp

	mov	nents, i

	mov	which, %o1

L(tp1):	subcc	%o1, 1, %o1

	ldx	[tp + 0], t0

	subc	%g0, %g0, mask

	sub	i, 1, i

	add	tp, stride, tp

	and	t0, mask, t0

	brnz	i, L(tp1)

	 or	t0, data0, data0

	stx	data0, [rp + 0]

L(b00):	 ret

	  restore

EPILOGUE()