On Thu, 27 May 2021 13:14:00 +0900, Richard Henderson wrote: > > Both input and output denormals flush to zero when DN is set. > > Cc: Philippe Mathieu-Daudé <f4...@amsat.org> > Cc: Yoshinori Sato <ys...@users.sourceforge.jp> > Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
Reviewd-by: Yoshinori Sato <ys...@users.sourceforge.jp> > --- > target/rx/op_helper.c | 9 ++++++++- > 1 file changed, 8 insertions(+), 1 deletion(-) > > diff --git a/target/rx/op_helper.c b/target/rx/op_helper.c > index ef904eb5f9..2139def3b2 100644 > --- a/target/rx/op_helper.c > +++ b/target/rx/op_helper.c > @@ -127,13 +127,20 @@ void helper_set_fpsw(CPURXState *env, uint32_t val) > float_round_down, > }; > uint32_t fpsw = env->fpsw; > + bool dn; > + > fpsw |= 0x7fffff03; > val &= ~0x80000000; > fpsw &= val; > FIELD_DP32(fpsw, FPSW, FS, FIELD_EX32(fpsw, FPSW, FLAGS) != 0); > env->fpsw = fpsw; > - set_float_rounding_mode(roundmode[FIELD_EX32(env->fpsw, FPSW, RM)], > + > + set_float_rounding_mode(roundmode[FIELD_EX32(fpsw, FPSW, RM)], > &env->fp_status); > + > + dn = FIELD_EX32(env->fpsw, FPSW, DN); > + set_flush_to_zero(dn, &env->fp_status); > + set_flush_inputs_to_zero(dn, &env->fp_status); > } > > #define FLOATOP(op, func) \ > -- > 2.25.1 > >
