1 #include "libm.h"
2 
3 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
cacosl(long double complex z)4 long double complex cacosl(long double complex z) {
5     return cacos(z);
6 }
7 #else
8 // FIXME
9 #define PI_2 1.57079632679489661923132169163975144L
cacosl(long double complex z)10 long double complex cacosl(long double complex z) {
11     z = casinl(z);
12     return CMPLXL(PI_2 - creall(z), -cimagl(z));
13 }
14 #endif
15