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| author | pelissip <pelissip@280ebfd0-de03-0410-8827-d642c229c3f4> | 2003-10-28 16:31:13 +0000 |
|---|---|---|
| committer | pelissip <pelissip@280ebfd0-de03-0410-8827-d642c229c3f4> | 2003-10-28 16:31:13 +0000 |
| commit | 117edf14c822a22cdd9c25689aeadc904a1a30d1 (patch) | |
| tree | e39bd61cefc24cc6cfbc5b2b956e4fb36015d111 /tan.c | |
| parent | 734c0a144b04e2cae4e67b394010e3f6e3cadecc (diff) | |
| download | mpfr-117edf14c822a22cdd9c25689aeadc904a1a30d1.tar.gz | |
Use of MPFR_UNLIKELY and MPFR_IS_SINGULAR for fast detection of special values (Nan, Inf or Zero).
Start to encapsulate the sign to be independant of the reprensation (Must be 1 or -1).
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2525 280ebfd0-de03-0410-8827-d642c229c3f4
Diffstat (limited to 'tan.c')
| -rw-r--r-- | tan.c | 26 |
1 files changed, 15 insertions, 11 deletions
@@ -31,18 +31,22 @@ mpfr_tan (mpfr_ptr y, mpfr_srcptr x, mp_rnd_t rnd_mode) int precy, m, ok, inexact; mpfr_t s, c; - if (MPFR_IS_NAN(x) || MPFR_IS_INF(x)) + if (MPFR_UNLIKELY(MPFR_IS_SINGULAR(x))) { - MPFR_SET_NAN(y); - MPFR_RET_NAN; - } - - if (MPFR_IS_ZERO(x)) - { - MPFR_CLEAR_FLAGS(y); - MPFR_SET_ZERO(y); - MPFR_SET_SAME_SIGN(y, x); - MPFR_RET(0); + if (MPFR_IS_NAN(x) || MPFR_IS_INF(x)) + { + MPFR_SET_NAN(y); + MPFR_RET_NAN; + } + else if (MPFR_IS_ZERO(x)) + { + MPFR_CLEAR_FLAGS(y); + MPFR_SET_ZERO(y); + MPFR_SET_SAME_SIGN(y, x); + MPFR_RET(0); + } + /* Should never reach this point */ + MPFR_ASSERTN(1); } precy = MPFR_PREC(y); |