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| author | Charles Harris <charlesr.harris@gmail.com> | 2019-02-22 12:55:50 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-02-22 12:55:50 -0700 |
| commit | 1bf2b9434b74a27019a04622dd5bc3790102e7d6 (patch) | |
| tree | 9c27ffa51141aa4994e65bdb14475243dc0ce1b6 /doc | |
| parent | 04b422017008bb24713475b85c072395dce89059 (diff) | |
| parent | 56bf38b018160471dfe88cb6f2a6dc0a5e93c087 (diff) | |
| download | numpy-1bf2b9434b74a27019a04622dd5bc3790102e7d6.tar.gz | |
Merge pull request #12846 from tlatorre-uchicago/divmod-bugfix
BUG: fix signed zero behavior in npy_divmod
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/release/1.17.0-notes.rst | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/doc/release/1.17.0-notes.rst b/doc/release/1.17.0-notes.rst index d3a7779c8..57f7505ff 100644 --- a/doc/release/1.17.0-notes.rst +++ b/doc/release/1.17.0-notes.rst @@ -36,7 +36,21 @@ Casting from a different floating point precision to float16 used incorrect rounding in some edge cases. This means in rare cases, subnormal results will now be rounded up instead of down, changing the last bit (ULP) of the result. +Signed zero when using divmod +----------------------------- +Starting in version 1.12.0, numpy incorrectly returned a negatively signed zero +when using the ``divmod`` and ``floor_divide`` functions when the result was +zero. For example:: + + >>> np.zeros(10)//1 + array([-0., -0., -0., -0., -0., -0., -0., -0., -0., -0.]) + +With this release, the result is correctly returned as a positively signed +zero:: + + >>> np.zeros(10)//1 + array([0., 0., 0., 0., 0., 0., 0., 0., 0., 0.]) C API changes ============= |