diff options
Diffstat (limited to 'doc/sum.txt')
| -rw-r--r-- | doc/sum.txt | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/doc/sum.txt b/doc/sum.txt index baca8d577..b51b95456 100644 --- a/doc/sum.txt +++ b/doc/sum.txt @@ -39,8 +39,39 @@ sum_raw (obtained from code refactoring for steps 3 to 6, and 8) should be introduced and described. Pre-rounding in (7) and rounding in (8) have been merged, and this [previously pre-rounding in (7)] is still done at the same time as sign handling with a single mpn operation. -The table concerning the correction term is also incorrect (the initial -truncation also has an influence, but it isn't taken into account yet). +The table concerning the correction term and the ternary value in case +of TMD should be changed to: + + rnd tmd R sst correction ternary + ─────────────────────────────────────────────── + N 1 0 - 0 + + N 1 0 0 0 0 + N 1 0 + 0 - + N 1 1 - +1 + + N 1 1 0 +1 0 + N 1 1 + +1 - + ─────────────────────────────────────────────── + N 2 0 - 0 - + N 2 0 0 ? ? (halfway case) + N 2 0 + +1 + + N 2 1 - 0 - + N 2 1 0 ? ? (halfway case) + N 2 1 + +1 + + ─────────────────────────────────────────────── + D 1 0 - -1 - + D 1 0 0 0 0 + D 1 0 + 0 - + D 1 1 - 0 - + D 1 1 0 +1 0 + D 1 1 + +1 - + ─────────────────────────────────────────────── + U 1 0 - 0 + + U 1 0 0 0 0 + U 1 0 + +1 + + U 1 1 - +1 + + U 1 1 0 +1 0 + U 1 1 + +2 + + ─────────────────────────────────────────────── The general ideas of the algorithm: |