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target/ppc: Clean up do_fri 

Let float64_round_to_int detect and silence snans.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211119160502.17432-18-richard.henderson@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Richard Henderson 2021-12-17 17:57:15 +01:00 committed by Cédric Le Goater
parent 1348d20b16
commit a496352736
1 changed files with 11 additions and 13 deletions
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24
target/ppc/fpu_helper.c
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@ -644,25 +644,23 @@ FPU_FCFI(fcfidus, uint64_to_float32, 1)
static uint64_t do_fri(CPUPPCState *env, uint64_t arg,
FloatRoundMode rounding_mode)
{
CPU_DoubleU farg;
FloatRoundMode old_rounding_mode = get_float_rounding_mode(&env->fp_status);
int flags;
farg.ll = arg;
set_float_rounding_mode(rounding_mode, &env->fp_status);
arg = float64_round_to_int(arg, &env->fp_status);
set_float_rounding_mode(old_rounding_mode, &env->fp_status);
if (unlikely(float64_is_signaling_nan(farg.d, &env->fp_status))) {
/* sNaN round */
flags = get_float_exception_flags(&env->fp_status);
if (flags & float_flag_invalid_snan) {
float_invalid_op_vxsnan(env, GETPC());
farg.ll = arg | 0x0008000000000000ULL;
} else {
set_float_rounding_mode(rounding_mode, &env->fp_status);
farg.ll = float64_round_to_int(farg.d, &env->fp_status);
set_float_rounding_mode(old_rounding_mode, &env->fp_status);
/* fri* does not set FPSCR[XX] */
env->fp_status.float_exception_flags &= ~float_flag_inexact;
}
/* fri* does not set FPSCR[XX] */
set_float_exception_flags(flags & ~float_flag_inexact, &env->fp_status);
do_float_check_status(env, GETPC());
return farg.ll;
return arg;
}
uint64_t helper_frin(CPUPPCState *env, uint64_t arg)