1 files changed, 30 insertions, 0 deletions
diff --git a/libmath/fdim.c b/libmath/fdim.c
new file mode 100644
index 00000000..1aec40c9
--- /dev/null
+++ b/libmath/fdim.c
@@ -0,0 +1,30 @@
+#include "lib9.h"
+#include "mathi.h"
+
+double
+fdim(double x, double y)
+{
+	if(x>y)
+		return x-y;
+	else
+		return 0;
+}
+
+double
+fmax(double x, double y)
+{
+	if(x>y)
+		return x;
+	else
+		return y;
+}
+
+double
+fmin(double x, double y)
+{
+	if(x<y)
+		return x;
+	else
+		return y;
+}
+