dnl  PowerPC-32 mpn_sec_tabselect.

dnl  Contributed to the GNU project by Torbjörn Granlund.

dnl  Copyright 2011-2013 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 603e:			 ?

C 604e:			 ?

C 75x (G3):		 ?

C 7400,7410 (G4):	 2.5

C 744x,745x (G4+):	 2.0

C power4/ppc970:	 2.0

C power5:		 ?

define(`rp',     `r3')

define(`tp',     `r4')

define(`n',      `r5')

define(`nents',  `r6')

define(`which',  `r7')

define(`i',      `r8')

define(`j',      `r9')

define(`stride', `r12')

define(`mask',   `r11')

ASM_START()

PROLOGUE(mpn_sec_tabselect)

	stwu	r1, -32(r1)

	addic.	j, n, -4		C outer loop induction variable

	stmw	r27, 8(r1)

	slwi	stride, n, 2

	blt	cr0, L(outer_end)

L(outer_top):

	mtctr	nents

	mr	r10, tp

	li	r28, 0

	li	r29, 0

	li	r30, 0

	li	r31, 0

	addic.	j, j, -4		C outer loop induction variable

	mr	i, which

	ALIGN(16)

L(top):	addic	i, i, -1		C set carry iff i != 0

	subfe	mask, mask, mask

	lwz	r0, 0(tp)

	lwz	r27, 4(tp)

	and	r0, r0, mask

	and	r27, r27, mask

	or	r28, r28, r0

	or	r29, r29, r27

	lwz	r0, 8(tp)

	lwz	r27, 12(tp)

	and	r0, r0, mask

	and	r27, r27, mask

	or	r30, r30, r0

	or	r31, r31, r27

	add	tp, tp, stride

	bdnz	L(top)

	stw	r28, 0(rp)

	stw	r29, 4(rp)

	stw	r30, 8(rp)

	stw	r31, 12(rp)

	addi	tp, r10, 16

	addi	rp, rp, 16

	bge	cr0, L(outer_top)

L(outer_end):

	andi.	r0, n, 2

	beq	cr0, L(b0x)

L(b1x):	mtctr	nents

	mr	r10, tp

	li	r28, 0

	li	r29, 0

	mr	i, which

	ALIGN(16)

L(tp2):	addic	i, i, -1

	subfe	mask, mask, mask

	lwz	r0, 0(tp)

	lwz	r27, 4(tp)

	and	r0, r0, mask

	and	r27, r27, mask

	or	r28, r28, r0

	or	r29, r29, r27

	add	tp, tp, stride

	bdnz	L(tp2)

	stw	r28, 0(rp)

	stw	r29, 4(rp)

	addi	tp, r10, 8

	addi	rp, rp, 8

L(b0x):	andi.	r0, n, 1

	beq	cr0, L(b00)

L(b01):	mtctr	nents

	mr	r10, tp

	li	r28, 0

	mr	i, which

	ALIGN(16)

L(tp1):	addic	i, i, -1

	subfe	mask, mask, mask

	lwz	r0, 0(tp)

	and	r0, r0, mask

	or	r28, r28, r0

	add	tp, tp, stride

	bdnz	L(tp1)

	stw	r28, 0(rp)

L(b00):	lmw	r27, 8(r1)

	addi	r1, r1, 32

	blr

EPILOGUE()