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| author |   Ulrich Drepper <drepper@gmail.com> | 2011-10-22 13:17:30 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-22 13:17:30 -0400 |
| commit | 77425c63e72bc0c01d81bc7e9ba4bb41d11679e6 (patch) | |
| tree | c4fea5ed8070fc251140eba66b009bca1ff0e3b5 /math/s_clog10.c | |
| parent | Optimization to some complex math functions (diff) | |
| download | glibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.tar.gz glibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.tar.bz2 glibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.zip | |
Add branch predictions to complex math code
Diffstat (limited to 'math/s_clog10.c')
| -rw-r--r-- | math/s_clog10.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/math/s_clog10.c b/math/s_clog10.c index a98de1942e..4b741fab55 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, |