xref: /openbmc/linux/arch/sh/lib/lshrsi3.S (revision b34e08d5)
1/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2   2004, 2005, 2006
3   Free Software Foundation, Inc.
4
5This file is free software; you can redistribute it and/or modify it
6under the terms of the GNU General Public License as published by the
7Free Software Foundation; either version 2, or (at your option) any
8later version.
9
10In addition to the permissions in the GNU General Public License, the
11Free Software Foundation gives you unlimited permission to link the
12compiled version of this file into combinations with other programs,
13and to distribute those combinations without any restriction coming
14from the use of this file.  (The General Public License restrictions
15do apply in other respects; for example, they cover modification of
16the file, and distribution when not linked into a combine
17executable.)
18
19This file is distributed in the hope that it will be useful, but
20WITHOUT ANY WARRANTY; without even the implied warranty of
21MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
22General Public License for more details.
23
24You should have received a copy of the GNU General Public License
25along with this program; see the file COPYING.  If not, write to
26the Free Software Foundation, 51 Franklin Street, Fifth Floor,
27Boston, MA 02110-1301, USA.  */
28
29!! libgcc routines for the Renesas / SuperH SH CPUs.
30!! Contributed by Steve Chamberlain.
31!! sac@cygnus.com
32
33!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
34!! recoded in assembly by Toshiyasu Morita
35!! tm@netcom.com
36
37/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
38   ELF local label prefixes by J"orn Rennecke
39   amylaar@cygnus.com  */
40
41!
42! __lshrsi3
43!
44! Entry:
45!
46! r4: Value to shift
47! r5: Shifts
48!
49! Exit:
50!
51! r0: Result
52!
53! Destroys:
54!
55! (none)
56!
57	.global	__lshrsi3
58
59	.align	2
60__lshrsi3:
61	mov	#31,r0
62	and	r0,r5
63	mova	lshrsi3_table,r0
64	mov.b	@(r0,r5),r5
65#ifdef __sh1__
66	add	r5,r0
67	jmp	@r0
68#else
69	braf	r5
70#endif
71	mov	r4,r0
72
73	.align	2
74lshrsi3_table:
75	.byte		lshrsi3_0-lshrsi3_table
76	.byte		lshrsi3_1-lshrsi3_table
77	.byte		lshrsi3_2-lshrsi3_table
78	.byte		lshrsi3_3-lshrsi3_table
79	.byte		lshrsi3_4-lshrsi3_table
80	.byte		lshrsi3_5-lshrsi3_table
81	.byte		lshrsi3_6-lshrsi3_table
82	.byte		lshrsi3_7-lshrsi3_table
83	.byte		lshrsi3_8-lshrsi3_table
84	.byte		lshrsi3_9-lshrsi3_table
85	.byte		lshrsi3_10-lshrsi3_table
86	.byte		lshrsi3_11-lshrsi3_table
87	.byte		lshrsi3_12-lshrsi3_table
88	.byte		lshrsi3_13-lshrsi3_table
89	.byte		lshrsi3_14-lshrsi3_table
90	.byte		lshrsi3_15-lshrsi3_table
91	.byte		lshrsi3_16-lshrsi3_table
92	.byte		lshrsi3_17-lshrsi3_table
93	.byte		lshrsi3_18-lshrsi3_table
94	.byte		lshrsi3_19-lshrsi3_table
95	.byte		lshrsi3_20-lshrsi3_table
96	.byte		lshrsi3_21-lshrsi3_table
97	.byte		lshrsi3_22-lshrsi3_table
98	.byte		lshrsi3_23-lshrsi3_table
99	.byte		lshrsi3_24-lshrsi3_table
100	.byte		lshrsi3_25-lshrsi3_table
101	.byte		lshrsi3_26-lshrsi3_table
102	.byte		lshrsi3_27-lshrsi3_table
103	.byte		lshrsi3_28-lshrsi3_table
104	.byte		lshrsi3_29-lshrsi3_table
105	.byte		lshrsi3_30-lshrsi3_table
106	.byte		lshrsi3_31-lshrsi3_table
107
108lshrsi3_6:
109	shlr2	r0
110lshrsi3_4:
111	shlr2	r0
112lshrsi3_2:
113	rts
114	shlr2	r0
115
116lshrsi3_7:
117	shlr2	r0
118lshrsi3_5:
119	shlr2	r0
120lshrsi3_3:
121	shlr2	r0
122lshrsi3_1:
123	rts
124	shlr	r0
125
126lshrsi3_14:
127	shlr2	r0
128lshrsi3_12:
129	shlr2	r0
130lshrsi3_10:
131	shlr2	r0
132lshrsi3_8:
133	rts
134	shlr8	r0
135
136lshrsi3_15:
137	shlr2	r0
138lshrsi3_13:
139	shlr2	r0
140lshrsi3_11:
141	shlr2	r0
142lshrsi3_9:
143	shlr8	r0
144	rts
145	shlr	r0
146
147lshrsi3_22:
148	shlr2	r0
149lshrsi3_20:
150	shlr2	r0
151lshrsi3_18:
152	shlr2	r0
153lshrsi3_16:
154	rts
155	shlr16	r0
156
157lshrsi3_23:
158	shlr2	r0
159lshrsi3_21:
160	shlr2	r0
161lshrsi3_19:
162	shlr2	r0
163lshrsi3_17:
164	shlr16	r0
165	rts
166	shlr	r0
167
168lshrsi3_30:
169	shlr2	r0
170lshrsi3_28:
171	shlr2	r0
172lshrsi3_26:
173	shlr2	r0
174lshrsi3_24:
175	shlr16	r0
176	rts
177	shlr8	r0
178
179lshrsi3_31:
180	shlr2	r0
181lshrsi3_29:
182	shlr2	r0
183lshrsi3_27:
184	shlr2	r0
185lshrsi3_25:
186	shlr16	r0
187	shlr8	r0
188	rts
189	shlr	r0
190
191lshrsi3_0:
192	rts
193	nop
194