1/* __lshrdi3.S:	64-bit logical shift right
2 *
3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12        .text
13        .p2align	4
14
15###############################################################################
16#
17# unsigned long long __lshrdi3(unsigned long long value [GR8:GR9], unsigned by [GR10])
18#
19###############################################################################
20        .globl		__lshrdi3
21        .type		__lshrdi3,@function
22__lshrdi3:
23	andicc.p	gr10,#63,gr10,icc0
24	setlos		#32,gr5
25	andicc.p	gr10,#32,gr0,icc1
26	beqlr		icc0,#0
27	ckeq		icc1,cc4			; cc4 is true if 0<N<32
28
29	# deal with a shift in the range 1<=N<=31
30	csrl.p		gr9,gr10,gr9	,cc4,#1		; LSW >>= N
31	csub		gr5,gr10,gr5	,cc4,#1		; M = 32 - N
32	csll.p		gr8,gr5,gr4	,cc4,#1
33	csrl		gr8,gr10,gr8	,cc4,#1		; MSW >>= N
34	cor.p		gr4,gr9,gr9	,cc4,#1		; LSW |= MSW << M
35
36	# deal with a shift in the range 32<=N<=63
37	csrl		gr8,gr10,gr9	,cc4,#0		; LSW = MSW >> (N & 31 [implicit AND])
38	cor.p		gr0,gr0,gr8	,cc4,#0		; MSW = 0
39	bralr
40	.size		__lshrdi3, .-__lshrdi3
41