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| author | Bastian Koppelmann <kbastian@mail.uni-paderborn.de> | 2023-08-28 13:26:45 +0200 |
|---|---|---|
| committer | Bastian Koppelmann <kbastian@mail.uni-paderborn.de> | 2023-09-28 10:45:22 +0200 |
| commit | e43692bce684b76480df66473a9b3bec7a7d312a (patch) | |
| tree | 0131838e0c4b78d041c60688f75ed52d831ba598 /target | |
| parent | 2bdbe35632fc1f5f83054427085f59d28f45660f (diff) | |
| download | qemu-e43692bce684b76480df66473a9b3bec7a7d312a.zip qemu-e43692bce684b76480df66473a9b3bec7a7d312a.tar.gz qemu-e43692bce684b76480df66473a9b3bec7a7d312a.tar.bz2 | |
target/tricore: Clarify special case for FTOUZ insn
this is not something other ISAs do, so clarify it with a comment.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-ID: <20230828112651.522058-6-kbastian@mail.uni-paderborn.de>
Diffstat (limited to 'target')
| -rw-r--r-- | target/tricore/fpu_helper.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/target/tricore/fpu_helper.c b/target/tricore/fpu_helper.c index 3aefeb7..d0c474c 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; |