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Add branch predictions to complex math code

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This commit is contained in:
Ulrich Drepper
2011-10-22 13:17:30 -04:00
parent bc62c2fb15
commit 77425c63e7
24 changed files with 101 additions and 132 deletions
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7
math/s_clog10l.c
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@ -1,5 +1,5 @@
/* Compute complex base 10 logarithm.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
Copyright (C) 1997, 1998, 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 @@ __clog10l (__complex__ long 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_PIl : 0.0;
@ -39,7 +38,7 @@ __clog10l (__complex__ long double x)
/* Yes, the following line raises an exception. */
__real__ result = -1.0 / fabsl (__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_log10l (__ieee754_hypotl (__real__ x,