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> --- 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