github.com/afumu/libc@v0.0.6/musl/src/complex/casinl.c (about)

     1  #include "complex_impl.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