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fpu: Use accessors for ftz_before_rounding

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Drop FloatFTZDetection and use #defines, like we do for
tininess_before_rounding.  Rename get_float_ftz_detection
to get_ftz_before_rounding and move to softfloat.c, as
there are no external users.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2026-05-01 20:05:59 +10:00
parent 86686309f1
commit 0dea2bdd4b
4 changed files with 12 additions and 16 deletions
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5
fpu/softfloat-parts.c.inc
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@@ -411,8 +411,7 @@ static void partsN(uncanon_normal)(FloatPartsN *p, float_status *s,
p->frac_lo &= ~round_mask;
}
fracN(shr)(p, frac_shift);
} else if (get_flush_to_zero(s) &&
s->ftz_detection == float_ftz_before_rounding) {
} else if (get_flush_to_zero(s) && get_ftz_before_rounding(s)) {
flags |= float_flag_output_denormal_flushed;
p->cls = float_class_zero;
exp = 0;
@@ -463,7 +462,7 @@ static void partsN(uncanon_normal)(FloatPartsN *p, float_status *s,
if (is_tiny) {
if (get_flush_to_zero(s)) {
assert(s->ftz_detection == float_ftz_after_rounding);
assert(!get_ftz_before_rounding(s));
flags |= float_flag_output_denormal_flushed;
p->cls = float_class_zero;
exp = 0;

5
fpu/softfloat-specialize.c.inc
View File

@@ -84,6 +84,11 @@ static inline bool get_tininess_before_rounding(const float_status *status)
return status->tininess_before_rounding;
}
static inline bool get_ftz_before_rounding(const float_status *status)
{
return status->ftz_before_rounding;
}
/*----------------------------------------------------------------------------
| For the deconstructed floating-point with fraction FRAC, return true
| if the fraction represents a signalling NaN; otherwise false.

10
include/fpu/softfloat-helpers.h
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@@ -116,10 +116,9 @@ static inline void set_flush_inputs_to_zero(bool val, float_status *status)
status->flush_inputs_to_zero = val;
}
static inline void set_float_ftz_detection(FloatFTZDetection d,
float_status *status)
static inline void set_float_ftz_detection(bool val, float_status *status)
{
status->ftz_detection = d;
status->ftz_before_rounding = val;
}
static inline void set_default_nan_mode(bool val, float_status *status)
@@ -198,9 +197,4 @@ static inline FloatSNaNRule get_snan_rule(float_status *status)
return status->float_snan_rule;
}
static inline FloatFTZDetection get_float_ftz_detection(const float_status *status)
{
return status->ftz_detection;
}
#endif /* SOFTFLOAT_HELPERS_H */

8
include/fpu/softfloat-types.h
View File

@@ -341,10 +341,8 @@ typedef enum __attribute__((__packed__)) {
* configure it matches the default for tininess_before_rounding
* (i.e. "after rounding").
*/
typedef enum __attribute__((__packed__)) {
float_ftz_after_rounding = 0,
float_ftz_before_rounding = 1,
} FloatFTZDetection;
#define float_ftz_after_rounding false
#define float_ftz_before_rounding true
/*
* floatx80 is primarily used by x86 and m68k, and there are
@@ -416,7 +414,7 @@ typedef struct float_status {
/* should denormalised results go to zero and set output_denormal_flushed? */
bool flush_to_zero;
/* do we detect and flush denormal results before or after rounding? */
FloatFTZDetection ftz_detection;
bool ftz_before_rounding;
/* should denormalised inputs go to zero and set input_denormal_flushed? */
bool flush_inputs_to_zero;
bool default_nan_mode;