Hi Jerome, >From memory, there is a small extension to load on the Q40/SMSQE which allow >the use of the FPU. (in fact, it work with any MC68xxx QL system with a >real FPU, even with the QXL if you replace the chip) >I believe it replace the math stack trap... thus making it system-available. >Or I might just be wrong.
FPSAVE allows for correct task switch with floating-point register in use by different applications. >I test it once with povray (a raytracer which uses a lot of floating points), >and it seems to have been quicker with than without. (same binaries). The reason is that C68 can create binaries which automatically use the FPU if available. That gives some speed advantage. It is even faster to directly use inlined FPU instructions. But such a binary would no longer run on non-FPU targets (as long as there is no FPU emulation established on those targets). Peter
