David Daney (ddaney@xxxxxxxxxx) writes: > All of this sounds good to me. However my current concerns are how to > make my code run on a mips32[r2] core with no floating point. We are > using several different systems with variations of this cpu type. > > So for me, making sure that a soft-float variant of the ABI is well > specified is also important. I suppose it would be to treat > float/double values as appropriate encoding of 32/64 bit integer values. Exactly - that's certainly what we do with o32 -msoft-float. I don't think there are even any corner cases to worry about. We've recently made some major improvements to our soft maths library to make it many times faster, but still IEEE-compliant. It was originally written by Algorithmics - a GPL'd version is used in the Linux/MIPS kernel to handle FPU exceptions. I should probably check before saying for certain, but I think we will distribute this under straight GPL conditions. If we had the time to do it, I guess we should put it on one of the OS project sites... but I'll cc: Nigel Stephens (who wrote it). If it might be of use to you (which seems quite likely) perhaps we could do a deal to get it on a site somewhere? Let me know if you'd like sight of it. -- Dominic
