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math: add fma TODO comments about the underflow issue
[oweals/musl.git]
/
src
/
math
/
__signbit.c
1
#include "libm.h"
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// FIXME: macro in math.h
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int __signbit(double x)
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{
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union {
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double d;
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uint64_t i;
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} y = { x };
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return y.i>>63;
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}
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