>If there is a way to use VIS (or any other SPARC instructions for that >mater) to make byteswapping faster then please implement them as sparc >versions of hton[s,l,ll]() and fixup <sys/byteswap.h>. Doing it that >way means that ZFS, Crypto, Networking and a whole lot of other code >gets to take advantage of it.
VIS uses floating point registers; the kernel doesn't save them by default and so using them in the kernel memory copies requires additional saves of the used floating point registers; the same is true for SSE instructions. Using them in the kernel has therefor an additional penalty. Casper _______________________________________________ opensolaris-code mailing list opensolaris-code@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/opensolaris-code
