From 0ac5ae2335292908f39031b1ea9fe8edce433c0f Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@gmail.com>
Date: Wed, 12 Oct 2011 11:27:51 -0400
Subject: Optimize libm

libm is now somewhat integrated with gcc's -ffinite-math-only option
and lots of the wrapper functions have been optimized.
---
 math/w_exp2l.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

(limited to 'math/w_exp2l.c')

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)
-- 
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