1/* libgcc functions for Blackfin.
2   Copyright (C) 2005 Free Software Foundation, Inc.
3   Contributed by Analog Devices.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to
19the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA.  */
21
22/* As a special exception, if you link this library with files
23   compiled with GCC to produce an executable, this does not cause
24   the resulting executable to be covered by the GNU General Public License.
25   This exception does not however invalidate any other reasons why
26   the executable file might be covered by the GNU General Public License.  */
27
28
29#ifdef L_divsi3
30.text
31.align 2
32.global ___divsi3;
33.type ___divsi3, STT_FUNC;
34
35___divsi3:
36        [--SP]= RETS;
37	[--SP] = R7;
38
39	R2 = -R0;
40        CC = R0 < 0;
41	IF CC R0 = R2;
42	R7 = CC;
43
44	R2 = -R1;
45        CC = R1 < 0;
46	IF CC R1 = R2;
47	R2 = CC;
48	R7 = R7 ^ R2;
49
50        CALL ___udivsi3;
51
52	CC = R7;
53	R1 = -R0;
54	IF CC R0 = R1;
55
56	R7 = [SP++];
57        RETS = [SP++];
58        RTS;
59#endif
60
61#ifdef L_modsi3	
62.align 2
63.global ___modsi3;
64.type ___modsi3, STT_FUNC;
65
66___modsi3:
67	[--SP] = RETS;
68	[--SP] = R0;
69	[--SP] = R1;
70	CALL ___divsi3;
71	R2 = [SP++];
72	R1 = [SP++];
73	R2 *= R0;
74	R0 = R1 - R2;
75	RETS = [SP++];
76	RTS; 
77#endif
78
79#ifdef L_udivsi3
80.align 2
81.global ___udivsi3;
82.type ___udivsi3, STT_FUNC;
83
84___udivsi3:
85        P0 = 32;
86        LSETUP (0f, 1f) LC0 = P0;
87	/* upper half of dividend */
88        R3 = 0;
890:
90	/* The first time round in the loop we shift in garbage, but since we
91	   perform 33 shifts, it doesn't matter.  */
92	R0 = ROT R0 BY 1;
93	R3 = ROT R3 BY 1;
94	R2 = R3 - R1;
95        CC = R3 < R1 (IU);
961:
97	/* Last instruction of the loop.  */
98	IF ! CC R3 = R2;
99
100	/* Shift in the last bit.  */
101	R0 = ROT R0 BY 1;
102	/* R0 is the result, R3 contains the remainder.  */
103	R0 = ~ R0;
104        RTS;
105#endif
106
107#ifdef L_umodsi3
108.align 2
109.global ___umodsi3;
110.type ___umodsi3, STT_FUNC;
111
112___umodsi3:
113	[--SP] = RETS;
114	CALL ___udivsi3;
115	R0 = R3;
116	RETS = [SP++]; 
117	RTS;
118#endif
119
120