Hi, so after investigation this was not an issue with the detection of SSSE3, but a bug in the SSE2-only optimization that was then used when SSSE3 is missing. Affected GeoTIFF files with 2 bands of type=Byte and pixel-interleaving layout (PlanarConfiguration=Contig)
Fixed by https://github.com/OSGeo/gdal/pull/2143 and backported to 3.0 and 2.4 branches (the interesting thing is that this code path was unit tested, but with data with a specific bit pattern that hid the bug, a bit like someone writting let addition(a,b) = a | b and believing it works correctly if testing addition(2,4), addition(5,24) etc. ) Even -- Spatialys - Geospatial professional services http://www.spatialys.com _______________________________________________ gdal-dev mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/gdal-dev
