dnl  SPARC v9 mpn_lshift

dnl  Contributed to the GNU project by 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
C UltraSPARC 3:		 2.5
C UltraSPARC T1:	17.5
C UltraSPARC T3:	 8
C UltraSPARC T4:	 3

C INPUT PARAMETERS
define(`rp',     `%i0')
define(`up',     `%i1')
define(`n',      `%i2')
define(`cnt',    `%i3')

define(`tcnt',   `%i4')
define(`retval', `%i5')
define(`u0',     `%l0')
define(`u1',     `%l1')
define(`r0',     `%l6')
define(`r1',     `%l7')
define(`u0_off', `%o0')
define(`u1_off', `%o1')
define(`r0_off', `%o2')
define(`r1_off', `%o3')

ASM_START()
	REGISTER(%g2,#scratch)
	REGISTER(%g3,#scratch)
PROLOGUE(mpn_lshift)
	save	%sp, -176, %sp

	sllx	n, 3, n
	sub	%g0, cnt, tcnt

	sub	up, 8, u1_off
	add	rp, (5 * 8), r1_off

	ldx	[n + u1_off], u1	C WAS: up - 8
	add	u1_off, (3 * 8), u1_off

	sub	r1_off, 8, r0_off
	sub	u1_off, 8, u0_off

	subcc	n, (3 * 8), n
	srlx	u1, tcnt, retval

	bl,pn	%xcc, L(end12)
	 sllx	u1, cnt, %l3

	ldx	[n + u0_off], u0	C WAS: up - 16
	subcc	n, (2 * 8), n

	ldx	[n + u1_off], u1	C WAS: up - 24

	bl,pn	%xcc, L(end34)
	 srlx	u0, tcnt, %l4

	b,a	L(top)
	ALIGN(16)
L(top):
	sllx	u0, cnt, %l2
	or	%l4, %l3, r0

	ldx	[n + u0_off], u0	C WAS: up - 16
	srlx	u1, tcnt, %l5

	stx	r0, [n + r0_off]	C WAS: rp - 8
	subcc	n, (2 * 8), n

	sllx	u1, cnt, %l3
	or	%l2, %l5, r1

	ldx	[n + u1_off], u1	C WAS: up - 24
	srlx	u0, tcnt, %l4

	bge,pt	%xcc, L(top)
	 stx	r1, [n + r1_off]	C WAS: rp - 16

L(end34):
	sllx	u0, cnt, %l2
	or	%l4, %l3, r0

	srlx	u1, tcnt, %l5
	stx	r0, [n + r0_off]	C WAS: rp - 8

	or	%l2, %l5, r1
	sub	n, (2 * 8), %o5

	sllx	u1, cnt, %l3
	stx	r1, [%o5 + r1_off]	C WAS: rp - 16

L(end12):
	andcc	n, 8, %g0
	bz,pn	%xcc, L(done)
	 nop

	ldx	[n + u0_off], u1
	srlx	u1, tcnt, %l4
	or	%l4, %l3, r0
	stx	r0, [r0_off - 24]
	sllx	u1, cnt, %l3
L(done):
	stx	%l3, [r0_off - 32]

	ret
	restore retval, 0, %o0
EPILOGUE()