aboutsummaryrefslogtreecommitdiff
path: root/math/s_catanhf.c
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@gmail.com>2011-10-22 13:17:30 -0400
committerUlrich Drepper <drepper@gmail.com>2011-10-22 13:17:30 -0400
commit77425c63e72bc0c01d81bc7e9ba4bb41d11679e6 (patch)
treec4fea5ed8070fc251140eba66b009bca1ff0e3b5 /math/s_catanhf.c
parentbc62c2fb152d6ffec63975d88fd8f1bc3d3b7c01 (diff)
downloadglibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.tar
glibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.tar.gz
glibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.tar.bz2
glibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.zip
Add branch predictions to complex math code
Diffstat (limited to 'math/s_catanhf.c')
-rw-r--r--math/s_catanhf.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/math/s_catanhf.c b/math/s_catanhf.c
index 7424bda9b9..f3d07f2354 100644
--- a/math/s_catanhf.c
+++ b/math/s_catanhf.c
@@ -1,5 +1,5 @@
/* Return arc hyperbole tangent for float value.
- Copyright (C) 1997 Free Software Foundation, Inc.
+ Copyright (C) 1997, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -20,7 +20,6 @@
#include <complex.h>
#include <math.h>
-
#include <math_private.h>
@@ -31,7 +30,7 @@ __catanhf (__complex__ float x)
int rcls = fpclassify (__real__ x);
int icls = fpclassify (__imag__ x);
- if (rcls <= FP_INFINITE || icls <= FP_INFINITE)
+ if (__builtin_expect (rcls <= FP_INFINITE || icls <= FP_INFINITE, 0))
{
if (icls == FP_INFINITE)
{
@@ -52,20 +51,18 @@ __catanhf (__complex__ float x)
__imag__ res = __nanf ("");
}
}
- else if (rcls == FP_ZERO && icls == FP_ZERO)
+ else if (__builtin_expect (rcls == FP_ZERO && icls == FP_ZERO, 0))
{
res = x;
}
else
{
- float i2, num, den;
-
- i2 = __imag__ x * __imag__ x;
+ float i2 = __imag__ x * __imag__ x;
- num = 1.0 + __real__ x;
+ float num = 1.0 + __real__ x;
num = i2 + num * num;
- den = 1.0 - __real__ x;
+ float den = 1.0 - __real__ x;
den = i2 + den * den;
__real__ res = 0.25 * (__ieee754_logf (num) - __ieee754_logf (den));