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| author | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2018-02-16 01:39:57 +0000 |
|---|---|---|
| committer | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2018-02-16 01:39:57 +0000 |
| commit | 273526299a0e4ed305bb89ba101090b718628367 (patch) | |
| tree | 85733d25ac93b2a5456eac85944e5d27c50cb3af /src/exp_2.c | |
| parent | 4924b53def77839fa36601c3e1870e1a5875284e (diff) | |
| download | mpfr-273526299a0e4ed305bb89ba101090b718628367.tar.gz | |
[src/exp_2.c] Note that the internal behavior depends on whether
MPFR_LONG_WITHIN_LIMB is defined or not (see also r12253). This
should not matter, possibly except in case of bug, like currently.
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@12255 280ebfd0-de03-0410-8827-d642c229c3f4
Diffstat (limited to 'src/exp_2.c')
| -rw-r--r-- | src/exp_2.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/exp_2.c b/src/exp_2.c index aafd431a9..548d0e70d 100644 --- a/src/exp_2.c +++ b/src/exp_2.c @@ -108,7 +108,10 @@ mpfr_exp_2 (mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t rnd_mode) { mp_limb_t r_limb[(sizeof (long) -1) / sizeof(mp_limb_t) + 1]; /* Note: we use precision sizeof (long) * CHAR_BIT - 1 here since it is - more efficient that full limb precision. */ + more efficient that full limb precision. + The value of n will depend on whether MPFR_LONG_WITHIN_LIMB is + defined or not. For instance, for r = 0.111E0, one gets n = 0 + in the former case and n = 1 in the latter case. */ MPFR_TMP_INIT1(r_limb, r, sizeof (long) * CHAR_BIT - 1); mpfr_div (r, x, __gmpfr_const_log2_RNDD, MPFR_RNDN); #ifdef MPFR_LONG_WITHIN_LIMB |