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Fixed RNA FP rounding mode semantics. Fixes #1190 and bugs reported by Youcheng Sun.

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This commit is contained in:
Christoph M. Wintersteiger 2018-02-03 16:44:44 +00:00
parent 8689921e9c
commit c3ed986031
2 changed files with 2 additions and 6 deletions
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2
src/util/mpf.cpp
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@ -2045,7 +2045,7 @@ void mpf_manager::round(mpf_rounding_mode rm, mpf & o) {
bool inc = false;
switch (rm) {
case MPF_ROUND_NEAREST_TEVEN: inc = round && (last || sticky); break;
case MPF_ROUND_NEAREST_TAWAY: inc = round && (!last || sticky); break;
case MPF_ROUND_NEAREST_TAWAY: inc = round; break;
case MPF_ROUND_TOWARD_POSITIVE: inc = (!o.sign && (round || sticky)); break;
case MPF_ROUND_TOWARD_NEGATIVE: inc = (o.sign && (round || sticky)); break;
case MPF_ROUND_TOWARD_ZERO: inc = false; break;