dnl  S/390-32 mpn_lshiftc.

dnl  Copyright 2011 Free Software Foundation, Inc.

dnl  This file is part of the GNU MP Library.

dnl  The GNU MP Library is free software; you can redistribute it and/or modify
dnl  it under the terms of the GNU Lesser General Public License as published
dnl  by the Free Software Foundation; either version 3 of the License, or (at
dnl  your option) any later version.

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 Lesser General Public
dnl  License for more details.

dnl  You should have received a copy of the GNU Lesser General Public License
dnl  along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.

include(`../config.m4')

C            cycles/limb
C z900		 7
C z990	         3.375
C z9		 ?
C z10		 ?
C z196		 ?

C TODO
C  *

C INPUT PARAMETERS
define(`rp',	`%r2')
define(`up',	`%r3')
define(`n',	`%r4')
define(`cnt',	`%r5')

ASM_START()
PROLOGUE(mpn_lshiftc)
	lr	%r1, n
	sll	%r1, 2
	stm	%r6, %r13, 24(%r15)
	la	up, 0(%r1,up)		C put up near end of U
	la	rp, 0(%r1,rp)		C put rp near end of R
	ahi	up, -20
	ahi	rp, -16
	lhi	%r8, 32
	sr	%r8, cnt
	l	%r12, 16(up)
	srl	%r12, 0(%r8)		C return value
	lhi	%r13, -1
	lhi	%r7, 3
	nr	%r7, n
	srl	n, 2
	je	L(b0)
	chi	%r7, 2
	jl	L(b1)
	je	L(b2)

L(b3):	l	%r10, 16(up)
	l	%r11, 12(up)
	l	%r9,   8(up)
	ahi	up, -8
	lr	%r8, %r11
	sldl	%r10, 0(cnt)
	sldl	%r8,  0(cnt)
	xr	%r10, %r13
	xr	%r8, %r13
	st	%r10, 12(rp)
	st	%r8,   8(rp)
	ahi	rp, -8
	ltr	n, n
	je	L(end)
	j	L(top)

L(b2):	l	%r10, 16(up)
	l	%r11, 12(up)
	ahi	up, -4
	sldl	%r10, 0(cnt)
	xr	%r10, %r13
	st	%r10, 12(rp)
	ahi	rp, -4
	ltr	n, n
	je	L(end)
	j	L(top)

L(b1):	ltr	n, n
	je	L(end)
	j	L(top)

L(b0):	l	%r10,16(up)
	l	%r8, 12(up)
	l	%r6,  8(up)
	l	%r0,  4(up)
	ahi	up, -12
	lr	%r11, %r8
	lr	%r9,  %r6
	lr	%r7,  %r0
	sldl	%r10,0(cnt)
	sldl	%r8, 0(cnt)
	sldl	%r6, 0(cnt)
	xr	%r10, %r13
	xr	%r8, %r13
	xr	%r6, %r13
	st	%r10, 12(rp)
	st	%r8,   8(rp)
	st	%r6,   4(rp)
	ahi	rp, -12
	ahi	n, -1
	je	L(end)

	ALIGN(8)
L(top):	l	%r10, 16(up)
	l	%r8,  12(up)
	l	%r6,   8(up)
	l	%r0,   4(up)
	l	%r1,   0(up)
	lr	%r11, %r8
	lr	%r9,  %r6
	lr	%r7,  %r0
	ahi	up, -16
	sldl	%r10, 0(cnt)
	sldl	%r8,  0(cnt)
	sldl	%r6,  0(cnt)
	sldl	%r0,  0(cnt)
	xr	%r10, %r13
	xr	%r8, %r13
	xr	%r6, %r13
	xr	%r0, %r13
	st	%r10, 12(rp)
	st	%r8,   8(rp)
	st	%r6,   4(rp)
	st	%r0,   0(rp)
	ahi	rp, -16
	brct	n, L(top)

L(end):	l	%r10, 16(up)
	sll	%r10, 0(cnt)
	xr	%r10, %r13
	st	%r10, 12(rp)

	lr	%r2, %r12
	lm	%r6, %r13, 24(%r15)
	br	%r14
EPILOGUE()
