diff options
Diffstat (limited to 'src/backend/utils/adt/float.c')
| -rw-r--r-- | src/backend/utils/adt/float.c | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/src/backend/utils/adt/float.c b/src/backend/utils/adt/float.c index 012c3252f3c..34af0eb22b5 100644 --- a/src/backend/utils/adt/float.c +++ b/src/backend/utils/adt/float.c @@ -72,19 +72,6 @@ static double sind_q1(double x); static double cosd_q1(double x); static void init_degree_constants(void); -#ifndef HAVE_CBRT -/* - * Some machines (in particular, some versions of AIX) have an extern - * declaration for cbrt() in <math.h> but fail to provide the actual - * function, which causes configure to not set HAVE_CBRT. Furthermore, - * their compilers spit up at the mismatch between extern declaration - * and static definition. We work around that here by the expedient - * of a #define to make the actual name of the static function different. - */ -#define cbrt my_cbrt -static double cbrt(double x); -#endif /* HAVE_CBRT */ - /* * We use these out-of-line ereport() calls to report float overflow, @@ -3964,28 +3951,3 @@ width_bucket_float8(PG_FUNCTION_ARGS) PG_RETURN_INT32(result); } - -/* ========== PRIVATE ROUTINES ========== */ - -#ifndef HAVE_CBRT - -static double -cbrt(double x) -{ - int isneg = (x < 0.0); - double absx = fabs(x); - double tmpres = pow(absx, (double) 1.0 / (double) 3.0); - - /* - * The result is somewhat inaccurate --- not really pow()'s fault, as the - * exponent it's handed contains roundoff error. We can improve the - * accuracy by doing one iteration of Newton's formula. Beware of zero - * input however. - */ - if (tmpres > 0.0) - tmpres -= (tmpres - absx / (tmpres * tmpres)) / (double) 3.0; - - return isneg ? -tmpres : tmpres; -} - -#endif /* !HAVE_CBRT */ |