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-rw-r--r--math/w_exp2l.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/math/w_exp2l.c b/math/w_exp2l.c
new file mode 100644
index 0000000000..965e9bf3e4
--- /dev/null
+++ b/math/w_exp2l.c
@@ -0,0 +1,30 @@
+/*
+ * wrapper exp2l(x)
+ */
+
+#include <float.h>
+#include "math.h"
+#include "math_private.h"
+
+static const long double o_threshold = (long double) LDBL_MAX_EXP;
+static const long double u_threshold = (long double) LDBL_MIN_EXP;
+
+long double
+__exp2l (long double x) /* wrapper exp2l */
+{
+#ifdef _IEEE_LIBM
+ return __ieee754_exp2l (x);
+#else
+ long double z;
+ z = __ieee754_exp2l (x);
+ if (_LIB_VERSION != _IEEE_ && __finitel (x))
+ {
+ if (x > o_threshold)
+ return __kernel_standard (x, x, 244); /* exp2l overflow */
+ else if (x < u_threshold)
+ return __kernel_standard (x, x, 245); /* exp2l underflow */
+ }
+ return z;
+#endif
+}
+weak_alias (__exp2l, exp2l)