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| author | pelissip <pelissip@280ebfd0-de03-0410-8827-d642c229c3f4> | 2004-08-23 09:32:27 +0000 |
|---|---|---|
| committer | pelissip <pelissip@280ebfd0-de03-0410-8827-d642c229c3f4> | 2004-08-23 09:32:27 +0000 |
| commit | 6f8448cc348b37bd97cd2ccdf945001b5ef20366 (patch) | |
| tree | 1bf588c924b5d9ad82a399a154575830e59002a1 | |
| parent | b8e1b02d4ed507b1a0be86f4159020077c4194be (diff) | |
| download | mpfr-6f8448cc348b37bd97cd2ccdf945001b5ef20366.tar.gz | |
Add description of what does MPFR_INT_CEIL_LOG2.
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2955 280ebfd0-de03-0410-8827-d642c229c3f4
| -rw-r--r-- | mpfr-impl.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mpfr-impl.h b/mpfr-impl.h index c440a412e..487289da5 100644 --- a/mpfr-impl.h +++ b/mpfr-impl.h @@ -532,7 +532,8 @@ do { \ mpfr_cache_t _cache = {{{{0,MPFR_SIGN_POS,0,(mp_limb_t*)0}},0,_func}} /* Ceil log 2: If GCC, uses a GCC extension - Warning: Needs to define MPFR_NEED_LONGLONG */ + Warning: Needs to define MPFR_NEED_LONGLONG. + Computes ceil(log2(x)) only for x integer (unsigned long) */ #if __MPFR_GNUC(2,95) # define MPFR_INT_CEIL_LOG2(x) \ ({int b; mp_limb_t limb = (x); MPFR_ASSERTD (limb == x); \ |