1 /*
2  * OpenRISC exception helper routines
3  *
4  * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #include "qemu/osdep.h"
21 #include "cpu.h"
22 #include "exec/exec-all.h"
23 #include "exec/helper-proto.h"
24 #include "exec/exec-all.h"
25 #include "exception.h"
26 
27 void HELPER(exception)(CPUOpenRISCState *env, uint32_t excp)
28 {
29     OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
30 
31     raise_exception(cpu, excp);
32 }
33 
34 static void QEMU_NORETURN do_range(CPUOpenRISCState *env, uintptr_t pc)
35 {
36     OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
37     CPUState *cs = CPU(cpu);
38 
39     cs->exception_index = EXCP_RANGE;
40     cpu_loop_exit_restore(cs, pc);
41 }
42 
43 void HELPER(ove_cy)(CPUOpenRISCState *env)
44 {
45     if (env->sr_cy) {
46         do_range(env, GETPC());
47     }
48 }
49 
50 void HELPER(ove_ov)(CPUOpenRISCState *env)
51 {
52     if (env->sr_ov < 0) {
53         do_range(env, GETPC());
54     }
55 }
56 
57 void HELPER(ove_cyov)(CPUOpenRISCState *env)
58 {
59     if (env->sr_cy || env->sr_ov < 0) {
60         do_range(env, GETPC());
61     }
62 }
63