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ulib
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musl
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src
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math
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__signbit.c
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#include
"libm.h"
// FIXME: macro in math.h
int
__signbit
(
double
x
)
{
union
{
double
d
;
uint64_t
i
;
}
y
=
{
x
};
return
y
.
i
>>
63
;
}