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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_csqrt.c | |
| parent | bc62c2fb152d6ffec63975d88fd8f1bc3d3b7c01 (diff) | |
| download | glibc-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_csqrt.c')
| -rw-r--r-- | math/s_csqrt.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/math/s_csqrt.c b/math/s_csqrt.c index 0ceb461b09..1691a01ecc 100644 --- a/math/s_csqrt.c +++ b/math/s_csqrt.c @@ -1,5 +1,5 @@ /* Complex square root of double 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 @@ __csqrt (__complex__ double 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 @@ __csqrt (__complex__ double x) } else { - if (icls == FP_ZERO) + if (__builtin_expect (icls == FP_ZERO, 0)) { if (__real__ x < 0.0) { @@ -75,7 +74,7 @@ __csqrt (__complex__ double x) __imag__ res = __copysign (0.0, __imag__ x); } } - else if (rcls == FP_ZERO) + else if (__builtin_expect (rcls == FP_ZERO, 0)) { double r = __ieee754_sqrt (0.5 * fabs (__imag__ x)); |