__SINCOS(3) | Library Functions Manual | __SINCOS(3) |
__sincos
—
sine-cosine function
#include
<math.h>
void
__sincosf
(float
x, float *sinp,
float *cosp);
void
__sincos
(double
x, double *sinp,
double *cosp);
The
__sincos
()
function computes the sine and cosine of x (measured
in radians) and stores the sine in the memory pointed to by
sinp and the cosine in the memory pointed to by
cosp.
__sincos
(±0,
sinp, cosp) sets
*sinp to ±0 and sets
*cosp to +1.
__sincos
(±infinity,
sinp, cosp) raises the
"invalid" floating-point exception and sets both
*sinp and *cosp to NaN.
If you need to apply the __sincos
()
function to SIMD vectors or arrays, using the following functions provided
by the Accelerate.framework may be useful:
#include
<Accelerate/Accelerate.h>
vFloat
vsincosf
(vFloat
x, vFloat *c);
void
vvsincosf
(float
*s, float *c, const float
*x, const int *n);
void
vvsincos
(double
*s, double *c, const double
*x, const int *n);
December 15, 2012 | macOS 14.6 |