math: raise flags in log2l.c on <= 0 arguments, and fix volatile

[musl] / src / complex / csinl.c

#include "libm.h"

#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double complex csinl(long double complex z)
{
        return csin(z);
}
#else
long double complex csinl(long double complex z)
{
        z = csinhl(cpackl(-cimagl(z), creall(z)));
        return cpackl(cimagl(z), -creall(z));
}
#endif