this is not something other ISAs do, so clarify it with a comment.
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Signed-off-by: Bastian Koppelmann <kbast...@mail.uni-paderborn.de>
Message-ID: <20230828112651.522058-6-kbast...@mail.uni-paderborn.de>
---
target/tricore/fpu_helper.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/target/tricore/fpu_helper.c b/target/tricore/fpu_helper.c
index 3aefeb776e..d0c474c5f3 100644
--- a/target/tricore/fpu_helper.c
+++ b/target/tricore/fpu_helper.c
@@ -475,6 +475,11 @@ uint32_t helper_ftouz(CPUTriCoreState *env, uint32_t arg)
if (float32_is_any_nan(f_arg)) {
result = 0;
}
+ /*
+ * we need to check arg < 0.0 before rounding as TriCore needs to raise
+ * float_flag_invalid as well. For instance, when we have a negative
+ * exponent and sign, softfloat would only raise float_flat_inexact.
+ */
} else if (float32_lt_quiet(f_arg, 0, &env->fp_status)) {
flags = float_flag_invalid;
result = 0;
--
2.42.0
