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softfloat: make NO_SIGNALING_NANS runtime property

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target/xtensa, the only user of NO_SIGNALING_NANS macro has FPU
implementations with and without the corresponding property. With
NO_SIGNALING_NANS being a macro they cannot be a part of the same QEMU
executable.
Replace macro with new property in float_status to allow cores with
different FPU implementations coexist.

Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: "Alex Bennée" <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov
2020-06-30 19:35:49 -07:00
parent a7d479ee51
commit cc43c69251
3 changed files with 129 additions and 113 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/fpu/softfloat-helpers.h
View File

@ -95,6 +95,11 @@ static inline void set_snan_bit_is_one(bool val, float_status *status)
status->snan_bit_is_one = val;
}
static inline void set_no_signaling_nans(bool val, float_status *status)
{
status->no_signaling_nans = val;
}
static inline bool get_float_detect_tininess(float_status *status)
{
return status->tininess_before_rounding;

7
include/fpu/softfloat-types.h
View File

@ -165,8 +165,13 @@ typedef struct float_status {
/* should denormalised inputs go to zero and set the input_denormal flag? */
bool flush_inputs_to_zero;
bool default_nan_mode;
/* not always used -- see snan_bit_is_one() in softfloat-specialize.h */
/*
* The flags below are not used on all specializations and may
* constant fold away (see snan_bit_is_one()/no_signalling_nans() in
* softfloat-specialize.inc.c)
*/
bool snan_bit_is_one;
bool no_signaling_nans;
} float_status;
#endif /* SOFTFLOAT_TYPES_H */