SDL/src/libm/s_copysign.c at SDL2 · elderica/SDL

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* ====================================================

* Developed at SunPro, a Sun Microsystems, Inc. business.

* Permission to use, copy, modify, and distribute this

* software is freely granted, provided that this notice

* is preserved.

* ====================================================

* copysign(double x, double y)

* copysign(x,y) returns a value with the magnitude of x and

* with the sign bit of y.

#include "math_libm.h"

#include "math_private.h"

double copysign(double x, double y)

{

u_int32_t hx,hy;

GET_HIGH_WORD(hx,x);

GET_HIGH_WORD(hy,y);

SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000));

return x;

}

libm_hidden_def(copysign)