diff options
| author | Richard Henderson <rth@twiddle.net> | 2015-04-07 13:31:50 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2017-02-14 08:14:59 +1100 |
| commit | 9ecaa27e7123211f45ca723a736ffae14f6c1f42 (patch) | |
| tree | c8bf8f3ba1f9c636c86ad110c9269425dc82f734 /target/openrisc/exception_helper.c | |
| parent | 6da544a6c4572ed11931218e940f45d00b1fe3a7 (diff) | |
| download | qemu-9ecaa27e7123211f45ca723a736ffae14f6c1f42.tar.gz | |
target/openrisc: Streamline arithmetic and OVE
Fix incorrect overflow calculation. Move overflow exception check
to a helper function, to eliminate inline branches. Remove some
incorrect special casing of R0. Implement multiply inline.
Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target/openrisc/exception_helper.c')
| -rw-r--r-- | target/openrisc/exception_helper.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/target/openrisc/exception_helper.c b/target/openrisc/exception_helper.c index 329a9e400b..7e54c978be 100644 --- a/target/openrisc/exception_helper.c +++ b/target/openrisc/exception_helper.c @@ -20,6 +20,7 @@ #include "qemu/osdep.h" #include "cpu.h" #include "exec/helper-proto.h" +#include "exec/exec-all.h" #include "exception.h" void HELPER(exception)(CPUOpenRISCState *env, uint32_t excp) @@ -28,3 +29,14 @@ void HELPER(exception)(CPUOpenRISCState *env, uint32_t excp) raise_exception(cpu, excp); } + +void HELPER(ove)(CPUOpenRISCState *env, target_ulong test) +{ + if (unlikely(test) && (env->sr & SR_OVE)) { + OpenRISCCPU *cpu = openrisc_env_get_cpu(env); + CPUState *cs = CPU(cpu); + + cs->exception_index = EXCP_RANGE; + cpu_loop_exit_restore(cs, GETPC()); + } +} |