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softfloat: Introduce Floatx80RoundPrec

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Use an enumeration instead of raw 32/64/80 values.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-11-21 09:33:36 -08:00
parent d6e1f0cd59
commit 8da5f1dbb0
9 changed files with 182 additions and 134 deletions
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5
include/fpu/softfloat-helpers.h
View file

@ -69,7 +69,7 @@ static inline void set_float_exception_flags(int val, float_status *status)
status->float_exception_flags = val;
}
static inline void set_floatx80_rounding_precision(int val,
static inline void set_floatx80_rounding_precision(FloatX80RoundPrec val,
float_status *status)
{
status->floatx80_rounding_precision = val;
@ -120,7 +120,8 @@ static inline int get_float_exception_flags(float_status *status)
return status->float_exception_flags;
}
static inline int get_floatx80_rounding_precision(float_status *status)
static inline FloatX80RoundPrec
get_floatx80_rounding_precision(float_status *status)
{
return status->floatx80_rounding_precision;
}

10
include/fpu/softfloat-types.h
View file

@ -154,6 +154,14 @@ enum {
float_flag_output_denormal = 128
};
/*
* Rounding precision for floatx80.
*/
typedef enum __attribute__((__packed__)) {
floatx80_precision_x,
floatx80_precision_d,
floatx80_precision_s,
} FloatX80RoundPrec;
/*
* Floating Point Status. Individual architectures may maintain
@ -165,7 +173,7 @@ enum {
typedef struct float_status {
FloatRoundMode float_rounding_mode;
uint8_t float_exception_flags;
signed char floatx80_rounding_precision;
FloatX80RoundPrec floatx80_rounding_precision;
bool tininess_before_rounding;
/* should denormalised results go to zero and set the inexact flag? */
bool flush_to_zero;

4
include/fpu/softfloat.h
View file

@ -1152,7 +1152,7 @@ floatx80 propagateFloatx80NaN(floatx80 a, floatx80 b, float_status *status);
| Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
floatx80 roundAndPackFloatx80(int8_t roundingPrecision, bool zSign,
floatx80 roundAndPackFloatx80(FloatX80RoundPrec roundingPrecision, bool zSign,
int32_t zExp, uint64_t zSig0, uint64_t zSig1,
float_status *status);
@ -1165,7 +1165,7 @@ floatx80 roundAndPackFloatx80(int8_t roundingPrecision, bool zSign,
| normalized.
*----------------------------------------------------------------------------*/
floatx80 normalizeRoundAndPackFloatx80(int8_t roundingPrecision,
floatx80 normalizeRoundAndPackFloatx80(FloatX80RoundPrec roundingPrecision,
bool zSign, int32_t zExp,
uint64_t zSig0, uint64_t zSig1,
float_status *status);