use #if LDBL_MANT_DIG == ... instead of custom LD80 etc macros

[libm] / src / math / __signbitl.c

diff --git a/src/math/__signbitl.c b/src/math/__signbitl.c
index fcc9e3c..81adb6c 100644 (file)
--- a/src/math/__signbitl.c
+++ b/src/math/__signbitl.c
@@ -1,7 +1,7 @@
 #include "libm.h"
 
 // FIXME: should be a macro
-#if LD80 || LD128
+#if (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
 int __signbitl(long double x)
 {
        union ldshape u = {x};