1 files changed, 22 insertions, 0 deletions
diff --git a/libm/w_exp2f.c b/libm/w_exp2f.c
new file mode 100644
index 000000000..8c337cd98
--- /dev/null
+++ b/libm/w_exp2f.c
@@ -0,0 +1,22 @@
+/*
+ * wrapper exp2f(x)
+ */
+
+#include <math.h>
+#include "math_private.h"
+
+float
+exp2f (float x)
+{
+#if __UCLIBC_HAS_FENV__
+  float z = (float) pow(2.0, (double) x);
+  if (__builtin_expect (!isfinite (z) || z == 0, 0)
+      && isfinite (x) && _LIB_VERSION != _IEEE_)
+    /* exp2 overflow: 144, exp2 underflow: 145 */
+    return __kernel_standard_f (x, x, 144 + !!signbit (x));
+
+  return z;
+#else
+  return (float) pow(2.0, (double) x);
+#endif
+}
+\ No newline at end of file