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powerpc: correctly handle fpu exceptions. 

Raise the exception on the first occurence, do not wait for the next
floating point operation.

Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tristan Gingold 2013-04-09 05:00:55 +00:00 committed by Alexander Graf
parent c4eda5b723
commit db72c9f256
1 changed files with 12 additions and 11 deletions
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23
target-ppc/fpu_helper.c
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@ -470,6 +470,18 @@ void store_fpscr(CPUPPCState *env, uint64_t arg, uint32_t mask)
void helper_float_check_status(CPUPPCState *env)
{
int status = get_float_exception_flags(&env->fp_status);
if (status & float_flag_divbyzero) {
float_zero_divide_excp(env);
} else if (status & float_flag_overflow) {
float_overflow_excp(env);
} else if (status & float_flag_underflow) {
float_underflow_excp(env);
} else if (status & float_flag_inexact) {
float_inexact_excp(env);
}
if (env->exception_index == POWERPC_EXCP_PROGRAM &&
(env->error_code & POWERPC_EXCP_FP)) {
/* Differred floating-point exception after target FPR update */
@ -477,17 +489,6 @@ void helper_float_check_status(CPUPPCState *env)
helper_raise_exception_err(env, env->exception_index,
env->error_code);
}
} else {
int status = get_float_exception_flags(&env->fp_status);
if (status & float_flag_divbyzero) {
float_zero_divide_excp(env);
} else if (status & float_flag_overflow) {
float_overflow_excp(env);
} else if (status & float_flag_underflow) {
float_underflow_excp(env);
} else if (status & float_flag_inexact) {
float_inexact_excp(env);
}
}
}