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[libm]
/
src
/
math
/
copysign.c
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#include "libm.h"
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double copysign(double x, double y) {
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union dshape ux, uy;
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ux.value = x;
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uy.value = y;
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ux.bits &= ~((uint64_t)1<<63);
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ux.bits |= uy.bits & (uint64_t)1<<63;
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return ux.value;
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}