qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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exception_helper.c (1565B)

      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 G_NORETURN
     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 
     42 void HELPER(ove_cy)(CPUOpenRISCState *env)
     43 {
     44     if (env->sr_cy) {
     45         do_range(env, GETPC());
     46     }
     47 }
     48 
     49 void HELPER(ove_ov)(CPUOpenRISCState *env)
     50 {
     51     if (env->sr_ov < 0) {
     52         do_range(env, GETPC());
     53     }
     54 }
     55 
     56 void HELPER(ove_cyov)(CPUOpenRISCState *env)
     57 {
     58     if (env->sr_cy || env->sr_ov < 0) {
     59         do_range(env, GETPC());
     60     }
     61 }