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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_clog10.c
parentbc62c2fb152d6ffec63975d88fd8f1bc3d3b7c01 (diff)
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Add branch predictions to complex math code
Diffstat (limited to 'math/s_clog10.c')
-rw-r--r--math/s_clog10.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/math/s_clog10.c b/math/s_clog10.c
index a98de19..4b741fa 100644
--- a/math/s_clog10.c
+++ b/math/s_clog10.c
@@ -1,5 +1,5 @@
/* Compute complex base 10 logarithm.
- 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 @@ __clog10 (__complex__ double x)
int rcls = fpclassify (__real__ x);
int icls = fpclassify (__imag__ x);
- if (rcls == FP_ZERO && icls == FP_ZERO)
+ if (__builtin_expect (rcls == FP_ZERO && icls == FP_ZERO, 0))
{
/* Real and imaginary part are 0.0. */
__imag__ result = signbit (__real__ x) ? M_PI : 0.0;
@@ -39,7 +38,7 @@ __clog10 (__complex__ double x)
/* Yes, the following line raises an exception. */
__real__ result = -1.0 / fabs (__real__ x);
}
- else if (rcls != FP_NAN && icls != FP_NAN)
+ else if (__builtin_expect (rcls != FP_NAN && icls != FP_NAN, 1))
{
/* Neither real nor imaginary part is NaN. */
__real__ result = __ieee754_log10 (__ieee754_hypot (__real__ x,