diff options
| author | zimmerma <zimmerma@280ebfd0-de03-0410-8827-d642c229c3f4> | 2007-05-28 21:23:23 +0000 |
|---|---|---|
| committer | zimmerma <zimmerma@280ebfd0-de03-0410-8827-d642c229c3f4> | 2007-05-28 21:23:23 +0000 |
| commit | a0567033b41a7d01f58f2b557ed351defd2d2756 (patch) | |
| tree | f10351502914ce3d95e6aa4b6a3d5f919d1bb6b0 /sec.c | |
| parent | 4c18ec893eb785746066df6c05c6c5886acb4fbb (diff) | |
| download | mpfr-a0567033b41a7d01f58f2b557ed351defd2d2756.tar.gz | |
fixed problem of tiny inputs in mpfr_sec and mpfr_csc,
by adding a SPECIAL_TINY macro in gen_inverse.h
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@4492 280ebfd0-de03-0410-8827-d642c229c3f4
Diffstat (limited to 'sec.c')
| -rw-r--r-- | sec.c | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -25,5 +25,10 @@ MA 02110-1301, USA. */ #define ACTION_NAN(y) do { MPFR_SET_NAN(y); MPFR_RET_NAN; } while (1) #define ACTION_INF(y) do { MPFR_SET_NAN(y); MPFR_RET_NAN; } while (1) #define ACTION_ZERO(y,x) return mpfr_set_ui (y, 1, GMP_RNDN) +/* for x near 0, sec(x) = 1 + x^2/2 + ..., more precisely |sec(x)-1| < x^2 + for |x| <= 1. */ +#define ACTION_TINY(y,x,r) \ + MPFR_FAST_COMPUTE_IF_SMALL_INPUT(y, __gmpfr_one, -2 * MPFR_GET_EXP (x), 0, \ + 1, r, inexact = _inexact; goto end) #include "gen_inverse.h" |