1 files changed, 30 insertions, 0 deletions
diff --git a/src/math/floor.c b/src/math/floor.c
new file mode 100644
index 00000000..2b2e07ab
--- /dev/null
+++ b/src/math/floor.c
@@ -0,0 +1,30 @@
+# define TGSOURCE "floor.c"
+#include <math.h>
+#include "nonstd/tgmath.h"
+#include "errno.h"
+
+/** round down to nearest integer **/
+TYPE TGFN(floor)(TYPE x)
+{
+	if (0) {
+		errno = ERANGE; /* The result cannot be represented */
+		/* RETURN_FAILURE(CONSTANT(HUGE_VAL), A range error occurred); */
+		return TGHUGE;
+	}
+
+	/* RETURN_SUCCESS(FLOOR(ARGUMENT(x))); */
+	return x;
+}
+
+/***
+compute the largest integral value that is not greater
+than ARGUMENT(x), returning it as the same floating-point type as ARGUMENT(x).
+***/
+
+/*
+IMPLEMENTATION(The value returned on a domain error, CONSTANT(HUGE_VAL))
+LINK(m)
+*/
+/*
+STDC(1)
+*/