Optimize libm

libm is now somewhat integrated with gcc's -ffinite-math-only option
and lots of the wrapper functions have been optimized.

1 files changed, 6 insertions, 4 deletions

diff --git a/sysdeps/ieee754/dbl-64/e_gamma_r.c b/sysdeps/ieee754/dbl-64/e_gamma_r.c
index f32309350c..c4b7470e5b 100644
--- a/sysdeps/ieee754/dbl-64/e_gamma_r.c
+++ b/sysdeps/ieee754/dbl-64/e_gamma_r.c
@@ -1,5 +1,5 @@
 /* Implementation of gamma function according to ISO C.
-   Copyright (C) 1997, 1999, 2001, 2004 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1999, 2001, 2004, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -33,19 +33,20 @@ __ieee754_gamma_r (double x, int *signgamp)
 
   EXTRACT_WORDS (hx, lx, x);
 
-  if (((hx & 0x7fffffff) | lx) == 0)
+  if (__builtin_expect (((hx & 0x7fffffff) | lx) == 0, 0))
     {
       /* Return value for x == 0 is Inf with divide by zero exception.  */
       *signgamp = 0;
       return 1.0 / x;
     }
-  if (hx < 0 && (u_int32_t) hx < 0xfff00000 && __rint (x) == x)
+  if (__builtin_expect (hx < 0, 0)
+      && (u_int32_t) hx < 0xfff00000 && __rint (x) == x)
     {
       /* Return value for integer x < 0 is NaN with invalid exception.  */
       *signgamp = 0;
       return (x - x) / (x - x);
     }
-  if ((unsigned int) hx == 0xfff00000 && lx==0)
+  if (__builtin_expect ((unsigned int) hx == 0xfff00000 && lx==0, 0))
     {
       /* x == -Inf.  According to ISO this is NaN.  */
       *signgamp = 0;
@@ -55,3 +56,4 @@ __ieee754_gamma_r (double x, int *signgamp)
   /* XXX FIXME.  */
   return __ieee754_exp (__ieee754_lgamma_r (x, signgamp));
 }
+strong_alias (__ieee754_gamma_r, __gamma_r_finite)