cpow, cpowf, cpowl — complex power functions
#include <complex.h>
double complex cpow(double complex x, double complex y);
float complex cpowf(float complex x, float complex y);
long double complex cpowl(long double complex x,
long double complex y);
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2024 defers to the ISO C standard.These functions shall compute the complex power function xy, with a branch cut for the first parameter along the negative real axis.
[MXC] These functions shall raise floating-point exceptions if appropriate for the calculation of the parts of the result, and may also raise spurious floating-point exceptions.
These functions shall return the complex power function value.
No errors are defined.
None.
None.
Permitting spurious floating-point exceptions allows cpow(z, c) to be implemented as cexp(cclog(z)) without precluding implementations that treat special cases more carefully.
None.
XBD <complex.h>
First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.
Austin Group Defect 1302 is applied, aligning these functions with the ISO/IEC 9899:2018 standard.
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