COPYSIGN(3) BSD Library Functions Manual COPYSIGN(3)NAME
copysign -- changes the sign of x to that of y
SYNOPSIS
#include <math.h>
double
copysign(double x, double y);
long double
copysignl(long double x, long double y);
float
copysignf(float x, float y);
DESCRIPTION
The copysign() functions return x with its sign changed to y's.
SPECIAL VALUES
copysign(x, y) returns a NaN (with y's sign) if x is a NaN.
VECTOR OPERATIONS
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);
STANDARDS
The copysign() functions conform to ISO/IEC 9899:2011.
BSD December 11, 2006 BSD
Check Out this Related Man Page
FMOD(3) BSD Library Functions Manual FMOD(3)NAME
fmod -- floating-point remainder function
SYNOPSIS
#include <math.h>
double
fmod(double x, double y);
long double
fmodl(long double x, long double y);
float
fmodf(float x, float y);
DESCRIPTION
The fmod() functions compute the floating-point remainder of x/ y.
Specifically, the functions return the value x-i*y, for some integer i such that, if y is non-zero, the result has the same sign as x and
magnitude less than the magnitude of y.
SPECIAL VALUES
fmod(+-0, y) returns +-0 if y is neither 0 nor NaN.
fmod(x, y) returns a NaN and raises the "invalid" floating-point exception for x infinite or y zero.
fmod(x, +-infinity) returns x for x not infinite.
VECTOR OPERATIONS
If you need to apply the fmod() 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 vfmodf(vFloat x, vFloat y);
void vvfmodf(float *z, const float *y, const float *x, const int *n);
void vvfmod(double *z, const double *y, const double *x, const int *n);
SEE ALSO math(3)STANDARDS
The fmod() functions conform to ISO/IEC 9899:2011.
BSD December 11, 2006 BSD
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