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authorUlrich Drepper <drepper@gmail.com>2011-10-12 11:27:51 -0400
committerUlrich Drepper <drepper@gmail.com>2011-10-12 11:27:51 -0400
commit0ac5ae2335292908f39031b1ea9fe8edce433c0f (patch)
treef9d26c8abc0de39d18d4c13e70f6022cdc6b461f /math/w_exp2l.c
parenta843a204a3e8a0dd53584dad3668771abaec84ac (diff)
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Optimize libm
libm is now somewhat integrated with gcc's -ffinite-math-only option
and lots of the wrapper functions have been optimized.
Diffstat (limited to 'math/w_exp2l.c')
-rw-r--r--math/w_exp2l.c20
1 files changed, 6 insertions, 14 deletions
diff --git a/math/w_exp2l.c b/math/w_exp2l.c
index f54e3946d8..ac8d231e2c 100644
--- a/math/w_exp2l.c
+++ b/math/w_exp2l.c
@@ -11,21 +11,13 @@ static const long double u_threshold
   = (long double) (LDBL_MIN_EXP - LDBL_MANT_DIG - 1);
 
 long double
-__exp2l (long double x)			/* wrapper exp2l */
+__exp2l (long double x)
 {
-#ifdef _IEEE_LIBM
+  if (__builtin_expect (x <= u_threshold || x > o_threshold, 0)
+      && _LIB_VERSION != _IEEE_ && __finitel (x))
+    /* exp2 overflow: 244, exp2 underflow: 245 */
+    return __kernel_standard (x, x, 244 + (x <= o_threshold));
+
   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)