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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>
stable-6.1
Richard Henderson 2020-10-22 09:17:46 -07:00
parent 57547c6023
commit e9e5534ff3
1 changed files with 8 additions and 2 deletions
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10
target/mips/fpu_helper.h
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@ -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)