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target/openrisc: Streamline arithmetic and OVE

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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>
This commit is contained in:
Richard Henderson 2015-04-07 13:31:50 -07:00
parent 6da544a6c4
commit 9ecaa27e71
5 changed files with 191 additions and 314 deletions
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12
target/openrisc/exception_helper.c
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@ -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());
}
}