diff options
Diffstat (limited to 'sysdeps/generic')
| -rw-r--r-- | sysdeps/generic/math_private.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sysdeps/generic/math_private.h b/sysdeps/generic/math_private.h index 0ab547d82f..6aea8643da 100644 --- a/sysdeps/generic/math_private.h +++ b/sysdeps/generic/math_private.h @@ -382,6 +382,22 @@ extern double __gamma_product (double x, double x_eps, int n, double *eps); extern long double __gamma_productl (long double x, long double x_eps, int n, long double *eps); +/* Compute lgamma of a negative argument X, if it is in a range + (depending on the floating-point format) for which expansion around + zeros is used, setting *SIGNGAMP accordingly. */ +extern float __lgamma_negf (float x, int *signgamp); +extern double __lgamma_neg (double x, int *signgamp); +extern long double __lgamma_negl (long double x, int *signgamp); + +/* Compute the product of 1 + (T / (X + X_EPS)), 1 + (T / (X + X_EPS + + 1)), ..., 1 + (T / (X + X_EPS + N - 1)), minus 1. X is such that + all the values X + 1, ..., X + N - 1 are exactly representable, and + X_EPS / X is small enough that factors quadratic in it can be + neglected. */ +extern double __lgamma_product (double t, double x, double x_eps, int n); +extern long double __lgamma_productl (long double t, long double x, + long double x_eps, int n); + #ifndef math_opt_barrier # define math_opt_barrier(x) \ ({ __typeof (x) __x = (x); __asm ("" : "+m" (__x)); __x; }) |