Merge remote-tracking branch 'remotes/alistair23/tags/pull-riscv-to-apply-20210921...
[qemu.git] / target / openrisc / exception_helper.c
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
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 void QEMU_NORETURN do_range(CPUOpenRISCState *env, uintptr_t pc)
34 {
35 CPUState *cs = env_cpu(env);
36
37 cs->exception_index = EXCP_RANGE;
38 cpu_loop_exit_restore(cs, pc);
39 }
40
41 void HELPER(ove_cy)(CPUOpenRISCState *env)
42 {
43 if (env->sr_cy) {
44 do_range(env, GETPC());
45 }
46 }
47
48 void HELPER(ove_ov)(CPUOpenRISCState *env)
49 {
50 if (env->sr_ov < 0) {
51 do_range(env, GETPC());
52 }
53 }
54
55 void HELPER(ove_cyov)(CPUOpenRISCState *env)
56 {
57 if (env->sr_cy || env->sr_ov < 0) {
58 do_range(env, GETPC());
59 }
60 }