libc-top-half/musl/src/complex/casinl.c

   1 #include "libm.h"
   2
   3 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
   4 long double complex casinl(long double complex z)
   5 {
   6         return casin(z);
   7 }
   8 #else
   9 // FIXME
  10 long double complex casinl(long double complex z)
  11 {
  12         long double complex w;
  13         long double x, y;
  14
  15         x = creall(z);
  16         y = cimagl(z);
  17         w = CMPLXL(1.0 - (x - y)*(x + y), -2.0*x*y);
  18         long double complex r = clogl(CMPLXL(-y, x) + csqrtl(w));
  19         return CMPLXL(cimagl(r), -creall(r));
  20 }
  21 #endif