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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_cexpl.c | |
| parent | bc62c2fb152d6ffec63975d88fd8f1bc3d3b7c01 (diff) | |
| download | glibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.zip glibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.tar.gz glibc-77425c63e72bc0c01d81bc7e9ba4bb41d11679e6.tar.bz2 | |
Add branch predictions to complex math code
Diffstat (limited to 'math/s_cexpl.c')
| -rw-r--r-- | math/s_cexpl.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/math/s_cexpl.c b/math/s_cexpl.c index 1c585f8..6bb56c0 100644 --- a/math/s_cexpl.c +++ b/math/s_cexpl.c @@ -1,5 +1,5 @@ /* Return value of complex exponential function for long double complex value. - 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. @@ -21,7 +21,6 @@ #include <complex.h> #include <fenv.h> #include <math.h> - #include <math_private.h> @@ -32,10 +31,10 @@ __cexpl (__complex__ long double x) int rcls = fpclassify (__real__ x); int icls = fpclassify (__imag__ x); - if (rcls >= FP_ZERO) + if (__builtin_expect (rcls >= FP_ZERO, 1)) { /* Real part is finite. */ - if (icls >= FP_ZERO) + if (__builtin_expect (icls >= FP_ZERO, 1)) { /* Imaginary part is finite. */ long double exp_val = __ieee754_expl (__real__ x); @@ -61,15 +60,13 @@ __cexpl (__complex__ long double x) __real__ retval = __nanl (""); __imag__ retval = __nanl (""); -#ifdef FE_INVALID feraiseexcept (FE_INVALID); -#endif } } - else if (rcls == FP_INFINITE) + else if (__builtin_expect (rcls == FP_INFINITE, 1)) { /* Real part is infinite. */ - if (icls >= FP_ZERO) + if (__builtin_expect (icls >= FP_ZERO, 1)) { /* Imaginary part is finite. */ long double value = signbit (__real__ x) ? 0.0 : HUGE_VALL; @@ -95,10 +92,8 @@ __cexpl (__complex__ long double x) __real__ retval = HUGE_VALL; __imag__ retval = __nanl (""); -#ifdef FE_INVALID if (icls == FP_INFINITE) feraiseexcept (FE_INVALID); -#endif } else { @@ -112,10 +107,8 @@ __cexpl (__complex__ long double x) __real__ retval = __nanl (""); __imag__ retval = __nanl (""); -#ifdef FE_INVALID if (rcls != FP_NAN || icls != FP_NAN) feraiseexcept (FE_INVALID); -#endif } return retval; |