diff options
| 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_cexp.c | |
| parent | bc62c2fb152d6ffec63975d88fd8f1bc3d3b7c01 (diff) | |
Add branch predictions to complex math code
Diffstat (limited to 'math/s_cexp.c')
| -rw-r--r-- | math/s_cexp.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/math/s_cexp.c b/math/s_cexp.c index de122e07f8..0d1ec29850 100644 --- a/math/s_cexp.c +++ b/math/s_cexp.c @@ -1,5 +1,5 @@ /* Return value of complex exponential function for 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 @@ __cexp (__complex__ 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. */ double exp_val = __ieee754_exp (__real__ x); @@ -61,15 +60,13 @@ __cexp (__complex__ double x) __real__ retval = __nan (""); __imag__ retval = __nan (""); -#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. */ double value = signbit (__real__ x) ? 0.0 : HUGE_VAL; @@ -95,10 +92,8 @@ __cexp (__complex__ double x) __real__ retval = HUGE_VAL; __imag__ retval = __nan (""); -#ifdef FE_INVALID if (icls == FP_INFINITE) feraiseexcept (FE_INVALID); -#endif } else { @@ -112,10 +107,8 @@ __cexp (__complex__ double x) __real__ retval = __nan (""); __imag__ retval = __nan (""); -#ifdef FE_INVALID if (rcls != FP_NAN || icls != FP_NAN) feraiseexcept (FE_INVALID); -#endif } return retval; |