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authorUlrich Drepper <drepper@redhat.com>2005-12-14 15:06:39 +0000
committerUlrich Drepper <drepper@redhat.com>2005-12-14 15:06:39 +0000
commit9d13fb2413921c713f83efe331e8e4d219c62c6b (patch)
tree2d44d7ac45ab2d147eb8361bbff880c365aa8ad5 /math/w_exp2l.c
parentb6ab06cef4670e02756bcdd4d2c33a49369a4346 (diff)
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Moved to csu/errno-loc.c.
Diffstat (limited to 'math/w_exp2l.c')
-rw-r--r--math/w_exp2l.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/math/w_exp2l.c b/math/w_exp2l.c
new file mode 100644
index 0000000000..fea5425ac4
--- /dev/null
+++ b/math/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)