1 files changed, 16 insertions, 0 deletions
diff --git a/lib/libm/__fpclassifyf.c b/lib/libm/__fpclassifyf.c
new file mode 100644
index 00000000..c8fc7585
--- /dev/null
+++ b/lib/libm/__fpclassifyf.c
@@ -0,0 +1,16 @@
+#include <math.h>
+#include <stdint.h>
+
+int __fpclassifyf(float x)
+{
+	union {
+		float f;
+		uint32_t i;
+	} u = { x };
+	int e = u.i >> 23 & 0xff;
+	if (!e)
+		return u.i << 1 ? FP_SUBNORMAL : FP_ZERO;
+	if (e == 0xff)
+		return u.i << 9 ? FP_NAN : FP_INFINITE;
+	return FP_NORMAL;
+}