summaryrefslogtreecommitdiff
path: root/sysdeps/generic/w_exp2l.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/generic/w_exp2l.c')
-rw-r--r--sysdeps/generic/w_exp2l.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/sysdeps/generic/w_exp2l.c b/sysdeps/generic/w_exp2l.c
new file mode 100644
index 0000000000..f492301223
--- /dev/null
+++ b/sysdeps/generic/w_exp2l.c
@@ -0,0 +1,31 @@
+/*
+ * 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 - LDBL_MANT_DIG - 1);
+
+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)