diff options
Diffstat (limited to 'math/s_cproj.c')
| -rw-r--r-- | math/s_cproj.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/math/s_cproj.c b/math/s_cproj.c index 8e7ca41df8..90e5ebaa4e 100644 --- a/math/s_cproj.c +++ b/math/s_cproj.c @@ -1,5 +1,5 @@ /* Compute projection of complex double value to Riemann sphere. - Copyright (C) 1997, 1999 Free Software Foundation, Inc. + Copyright (C) 1997, 1999, 2010 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -25,24 +25,19 @@ __complex__ double __cproj (__complex__ double x) { - __complex__ double res; - if (isnan (__real__ x) && isnan (__imag__ x)) return x; else if (!isfinite (__real__ x) || !isfinite (__imag__ x)) { + __complex__ double res; + __real__ res = INFINITY; __imag__ res = __copysign (0.0, __imag__ x); - } - else - { - double den = __real__ x * __real__ x + __imag__ x * __imag__ x + 1.0; - - __real__ res = (2.0 * __real__ x) / den; - __imag__ res = (2.0 * __imag__ x) / den; + + return res; } - return res; + return x; } weak_alias (__cproj, cproj) #ifdef NO_LONG_DOUBLE |