COPYSIGN(3) | Library Functions Manual | COPYSIGN(3) |
copysign
— changes
the sign of x to that of y
#include
<math.h>
double
copysign
(double
x, double y);
long double
copysignl
(long
double x, long double
y);
float
copysignf
(float
x, float y);
The
copysign
()
functions return x with its sign changed to
y's.
copysign
(x,
y) returns a NaN (with y's sign) if x is a NaN.
If you need to apply the copysign
()
functions to SIMD vectors or arrays, using the following functions provided
by the Accelerate.framework may give significantly better performance:
#include
<Accelerate/Accelerate.h>
vFloat
vcopysignf
(vFloat
x, vFloat y);
void
vvcopysignf
(float
*z, const float *y, const float
*x, const int *n);
void
vvcopysign
(double
*z, const double *y, const
double *x, const int *n);
The copysign
() functions conform to
ISO/IEC 9899:2011.
December 11, 2006 | macOS 14.6 |