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fpu: Remove use_first_nan field from float_status

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The use_first_nan field in float_status was an xtensa-specific way to
select at runtime from two different NaN propagation rules.  Now that
xtensa is using the target-agnostic NaN propagation rule selection
that we've just added, we can remove use_first_nan, because there is
no longer any code that reads it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-27-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2024-12-11 15:30:59 +00:00
parent f8023791f2
commit dc416d6ca7
3 changed files with 0 additions and 7 deletions
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5
include/fpu/softfloat-helpers.h
View file

@ -113,11 +113,6 @@ static inline void set_snan_bit_is_one(bool val, float_status *status)
status->snan_bit_is_one = val; status->snan_bit_is_one = val;
} }
static inline void set_use_first_nan(bool val, float_status *status)
{
status->use_first_nan = val;
}
static inline void set_no_signaling_nans(bool val, float_status *status) static inline void set_no_signaling_nans(bool val, float_status *status)
{ {
status->no_signaling_nans = val; status->no_signaling_nans = val;

1
include/fpu/softfloat-types.h
View file

@ -309,7 +309,6 @@ typedef struct float_status {
* softfloat-specialize.inc.c) * softfloat-specialize.inc.c)
*/ */
bool snan_bit_is_one; bool snan_bit_is_one;
bool use_first_nan;
bool no_signaling_nans; bool no_signaling_nans;
/* should overflowed results subtract re_bias to its exponent? */ /* should overflowed results subtract re_bias to its exponent? */
bool rebias_overflow; bool rebias_overflow;

1
target/xtensa/fpu_helper.c
View file

@ -59,7 +59,6 @@ static const struct {
void xtensa_use_first_nan(CPUXtensaState *env, bool use_first) void xtensa_use_first_nan(CPUXtensaState *env, bool use_first)
{ {
set_use_first_nan(use_first, &env->fp_status);
set_float_2nan_prop_rule(use_first ? float_2nan_prop_ab : float_2nan_prop_ba, set_float_2nan_prop_rule(use_first ? float_2nan_prop_ab : float_2nan_prop_ba,
&env->fp_status); &env->fp_status);
set_float_3nan_prop_rule(use_first ? float_3nan_prop_abc : float_3nan_prop_cba, set_float_3nan_prop_rule(use_first ? float_3nan_prop_abc : float_3nan_prop_cba,