fusl/src/complex/casinl.c

#include "libm.h"

#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double complex casinl(long double complex z) {
  return casin(z);
}
#else
// FIXME
long double complex casinl(long double complex z) {
  long double complex w;
  long double x, y;

  x = creall(z);
  y = cimagl(z);
  w = CMPLXL(1.0 - (x - y) * (x + y), -2.0 * x * y);
  return clogl(CMPLXL(-y, x) + csqrtl(w));
}
#endif