Now would I know non-SSE hardware if I met it in the wild? John
2008/5/2 mabshoff <[EMAIL PROTECTED]>: > > On May 2, 8:06 pm, Jason Grout <[EMAIL PROTECTED]> wrote: > > William Stein wrote: > > Hi, > > > > Steal the CPU detection code from ATLAS and use that to test to see if > > the processor we're running on is the same as the processor we compiled > > for? That seems like a bit much. > > You really don't want to do that - believe me, I have seen and > improved the ATLAS cpu detection code and it requires an assembler to > work. Other than that it is overblown and we can cook up something > better and simpler with a three line bash script ;) > > > > How about compiling a generic binary (i.e., minimal optimizations)? Is > > that possible with ATLAS and the other programs? > > Yes, but then something else will break. Depending on the compiler you > use it just uses SSE2 instructions unless you specifically tell the > compiler not to use it. And attempting to dix that via CFLAGS and > CPPFLAGS is not a good idea. Somebody needs to find some pre-SSE2 > hardware and donate it to William so we can build a "last resort" > binary. Anything else will likely not work. > > tseug from IRC did build Sage 3.0 on some Duron laptop and it took 22 > hours, so building from source is generally not a good idea for people > with low end hardware, but since we cannot and will not likely provide > binaries for a wide range of distributions for non-SSE2 hardware due > to limited and usually slow hardware it is something we will have to > deal with for a while. Could we use a bunch on non-SSE2 Athlons with > decent, i.e. 1GB RAM, this would be doable. > > > Jason > > Thoughts? > > Cheers, > > Michael > > > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
