>> Do pointers always have to be aligned? > > Depends on the architecture, e.g., Sparc doesn't allow non-aligned pointers > at all (results in a segfault), SV x86_64 ABI specifies pointers to be > aligned at 8 bytes, but the x86_64 CPUs will allow misaligned pointers with a > performance penalty (the same was true for x86 - i.e. misaligned pointers are > tolerated with a penalty).
Ok, so you might not have to align pointers a particular architecture, but if you're writing code that you want to work across multiple architectures you must. Hadley -- Chief Scientist, RStudio http://had.co.nz/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
