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 2.1 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 "exception.h"
25 
HELPER(exception)26 void HELPER(exception)(CPUOpenRISCState *env, uint32_t excp)
27 {
28     OpenRISCCPU *cpu = env_archcpu(env);
29 
30     raise_exception(cpu, excp);
31 }
32 
33 static G_NORETURN
do_range(CPUOpenRISCState * env,uintptr_t pc)34 void do_range(CPUOpenRISCState *env, uintptr_t pc)
35 {
36     CPUState *cs = env_cpu(env);
37 
38     cs->exception_index = EXCP_RANGE;
39     cpu_loop_exit_restore(cs, pc);
40 }
41 
HELPER(ove_cy)42 void HELPER(ove_cy)(CPUOpenRISCState *env)
43 {
44     if (env->sr_cy) {
45         do_range(env, GETPC());
46     }
47 }
48 
HELPER(ove_ov)49 void HELPER(ove_ov)(CPUOpenRISCState *env)
50 {
51     if (env->sr_ov < 0) {
52         do_range(env, GETPC());
53     }
54 }
55 
HELPER(ove_cyov)56 void HELPER(ove_cyov)(CPUOpenRISCState *env)
57 {
58     if (env->sr_cy || env->sr_ov < 0) {
59         do_range(env, GETPC());
60     }
61 }
62