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| author | Sturla Molden <sturla@molden.no> | 2014-10-27 07:45:57 +0100 |
|---|---|---|
| committer | Charles Harris <charlesr.harris@gmail.com> | 2015-05-03 12:58:26 -0600 |
| commit | cf3077696dd76d88e77173546a0d969eda3a7aa0 (patch) | |
| tree | 4880f6a00c5a3b16ad3bbb575b8338d8a47a442f /numpy/matrixlib/tests/test_defmatrix.py | |
| parent | 3782f7e0bfd9ac230b672a1295df580a40e9e109 (diff) | |
| download | numpy-cf3077696dd76d88e77173546a0d969eda3a7aa0.tar.gz | |
BUG: Workaround segfault in Apple Accelerate framework SGEMV
SGEMV in Accelerate framework will segfault on MacOS X version 10.9
(aka Mavericks) if arrays are not aligned to 32 byte boundaries and the
CPU supports AVX instructions. This can produce segfaults in np.dot.
This patch overshadows the symbols cblas_sgemv, sgemv_ and sgemv
exported by Accelerate to produce the correct behavior. The MacOS X
version and CPU specs are checked on module import. If Mavericks and AVX
are detected the call to SGEMV is emulated with a call to SGEMM if the
arrays are not 32 byte aligned. If the exported symbols cannot be
overshadowed on module import, a fatal error is produced and the process
aborts. All the fixes are in a self-contained C file and do not alter
the multiarray C code. The patch is not applied unless NumPy is
configured to link with Apple's Accelerate framework.
Diffstat (limited to 'numpy/matrixlib/tests/test_defmatrix.py')
0 files changed, 0 insertions, 0 deletions