fix broken thread list unlocking after fork

[musl] / src / complex / cacoshl.c

diff --git a/src/complex/cacoshl.c b/src/complex/cacoshl.c
index d3eaee2..3a284be 100644 (file)
--- a/src/complex/cacoshl.c
+++ b/src/complex/cacoshl.c
@@ -8,7 +8,10 @@ long double complex cacoshl(long double complex z)
 #else
 long double complex cacoshl(long double complex z)
 {
+       int zineg = signbit(cimagl(z));
+
        z = cacosl(z);
-       return CMPLXL(-cimagl(z), creall(z));
+       if (zineg) return CMPLXL(cimagl(z), -creall(z));
+       else       return CMPLXL(-cimagl(z), creall(z));
 }
 #endif