fpu: Use accessors for ftz_before_rounding
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>
Richard Henderson committed
May 1, 2026 at 20:05 UTC
0dea2bdd4b46a41de0a8384609456ea070a3b31d
4 files changed
+12
-16
fpu/softfloat-parts.c.inc
+2
-3
@@ -411,8 +411,7 @@ static void partsN(uncanon_normal)(FloatPartsN *p, float_status *s,
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p->frac_lo &= ~round_mask;
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}
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fracN(shr)(p, frac_shift);
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- } else if (get_flush_to_zero(s) &&
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- s->ftz_detection == float_ftz_before_rounding) {
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+ } else if (get_flush_to_zero(s) && get_ftz_before_rounding(s)) {
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flags |= float_flag_output_denormal_flushed;
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p->cls = float_class_zero;
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exp = 0;
@@ -463,7 +462,7 @@ static void partsN(uncanon_normal)(FloatPartsN *p, float_status *s,
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if (is_tiny) {
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if (get_flush_to_zero(s)) {
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- assert(s->ftz_detection == float_ftz_after_rounding);
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+ assert(!get_ftz_before_rounding(s));
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flags |= float_flag_output_denormal_flushed;
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p->cls = float_class_zero;
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exp = 0;
fpu/softfloat-specialize.c.inc
+5
@@ -84,6 +84,11 @@ static inline bool get_tininess_before_rounding(const float_status *status)
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return status->tininess_before_rounding;
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}
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+static inline bool get_ftz_before_rounding(const float_status *status)
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+{
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+ return status->ftz_before_rounding;
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+}
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+
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/*----------------------------------------------------------------------------
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| For the deconstructed floating-point with fraction FRAC, return true
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| if the fraction represents a signalling NaN; otherwise false.
include/fpu/softfloat-helpers.h
+2
-8
@@ -116,10 +116,9 @@ static inline void set_flush_inputs_to_zero(bool val, float_status *status)
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status->flush_inputs_to_zero = val;
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}
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-static inline void set_float_ftz_detection(FloatFTZDetection d,
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- float_status *status)
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+static inline void set_float_ftz_detection(bool val, float_status *status)
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{
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- status->ftz_detection = d;
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+ status->ftz_before_rounding = val;
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}
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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)
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return status->float_snan_rule;
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}
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-static inline FloatFTZDetection get_float_ftz_detection(const float_status *status)
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-{
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- return status->ftz_detection;
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-}
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-
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#endif /* SOFTFLOAT_HELPERS_H */
include/fpu/softfloat-types.h
+3
-5
@@ -341,10 +341,8 @@ typedef enum __attribute__((__packed__)) {
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* configure it matches the default for tininess_before_rounding
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* (i.e. "after rounding").
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*/
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-typedef enum __attribute__((__packed__)) {
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- float_ftz_after_rounding = 0,
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- float_ftz_before_rounding = 1,
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-} FloatFTZDetection;
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+#define float_ftz_after_rounding false
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+#define float_ftz_before_rounding true
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/*
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* floatx80 is primarily used by x86 and m68k, and there are
@@ -416,7 +414,7 @@ typedef struct float_status {
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/* should denormalised results go to zero and set output_denormal_flushed? */
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bool flush_to_zero;
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/* do we detect and flush denormal results before or after rounding? */
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- FloatFTZDetection ftz_detection;
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+ bool ftz_before_rounding;
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/* should denormalised inputs go to zero and set input_denormal_flushed? */
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bool flush_inputs_to_zero;
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bool default_nan_mode;