aboutsummaryrefslogtreecommitdiff
path: root/math/s_csqrtf.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_csqrtf.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_csqrtf.c')
-rw-r--r--math/s_csqrtf.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/math/s_csqrtf.c b/math/s_csqrtf.c
index 1cf3b79c31..1613192a5e 100644
--- a/math/s_csqrtf.c
+++ b/math/s_csqrtf.c
@@ -1,5 +1,5 @@
/* Complex square root of float value.
- Copyright (C) 1997, 1998, 2005 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 2005, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Based on an algorithm by Stephen L. Moshier <moshier@world.std.com>.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -21,7 +21,6 @@
#include <complex.h>
#include <math.h>
-
#include <math_private.h>
@@ -32,7 +31,7 @@ __csqrtf (__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)
{
@@ -61,7 +60,7 @@ __csqrtf (__complex__ float x)
}
else
{
- if (icls == FP_ZERO)
+ if (__builtin_expect (icls == FP_ZERO, 0))
{
if (__real__ x < 0.0)
{
@@ -75,7 +74,7 @@ __csqrtf (__complex__ float x)
__imag__ res = __copysignf (0.0, __imag__ x);
}
}
- else if (rcls == FP_ZERO)
+ else if (__builtin_expect (rcls == FP_ZERO, 0))
{
float r = __ieee754_sqrtf (0.5 * fabsf (__imag__ x));