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| author | Richard Henderson | 2020-10-22 18:17:46 +0200 |
|---|---|---|
| committer | Richard Henderson | 2021-05-16 14:13:51 +0200 |
| commit | e9e5534ff30a0441d2efa59004e3f815177e7c10 (patch) | |
| tree | 672ca41df08711f12b393a69ae72eab42ff1392a /target/mips/fpu_helper.h | |
| parent | softfloat: fix return_nan vs default_nan_mode (diff) | |
| download | qemu-e9e5534ff30a0441d2efa59004e3f815177e7c10.tar.gz qemu-e9e5534ff30a0441d2efa59004e3f815177e7c10.tar.xz qemu-e9e5534ff30a0441d2efa59004e3f815177e7c10.zip | |
target/mips: Set set_default_nan_mode with set_snan_bit_is_one
This behavior is currently hard-coded in parts_silence_nan,
but setting this bit properly will allow this to be cleaned up.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'target/mips/fpu_helper.h')
| -rw-r--r-- | target/mips/fpu_helper.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/target/mips/fpu_helper.h b/target/mips/fpu_helper.h index 1c2d6d35a7..ad1116e8c1 100644 --- a/target/mips/fpu_helper.h +++ b/target/mips/fpu_helper.h @@ -27,8 +27,14 @@ static inline void restore_flush_mode(CPUMIPSState *env) static inline void restore_snan_bit_mode(CPUMIPSState *env) { - set_snan_bit_is_one((env->active_fpu.fcr31 & (1 << FCR31_NAN2008)) == 0, - &env->active_fpu.fp_status); + bool nan2008 = env->active_fpu.fcr31 & (1 << FCR31_NAN2008); + + /* + * With nan2008, SNaNs are silenced in the usual way. + * Before that, SNaNs are not silenced; default nans are produced. + */ + set_snan_bit_is_one(!nan2008, &env->active_fpu.fp_status); + set_default_nan_mode(!nan2008, &env->active_fpu.fp_status); } static inline void restore_fp_status(CPUMIPSState *env) |