rename non-compiled files to *.h

1 files changed, 23 insertions, 0 deletions

diff --git a/src/math/signbit.h b/src/math/signbit.h
new file mode 100644
index 00000000..77cc3977
--- /dev/null
+++ b/src/math/signbit.h
@@ -0,0 +1,23 @@
+#include <math.h>
+
+#define signbit(__x) \
+	(sizeof(__x) == sizeof(long double) ? \
+		((((union { \
+			long double __f; \
+			char __c[sizeof(__x)]; \
+		}){.__f = (__x)}).__c[sizeof(__x)-1] & 0x80) == 0x80 ? 1 : 0) : \
+	sizeof(__x) == sizeof(double) ? \
+		((((union { \
+			double __f; \
+			char __c[sizeof(__x)]; \
+		}){.__f = (__x)}).__c[sizeof(__x)-1] & 0x80) == 0x80 ? 1 : 0) : \
+		(((union { \
+			float __f; \
+			char __c[sizeof(__x)]; \
+		}){.__f = (__x)}).__c[sizeof(__x)-1] & 0x80) == 0x80 ? 1 : 0)
+
+
+/*
+STDC(199901)
+LINK(m)
+*/