On Tue, 2005-05-10 at 08:26 -0400, Jakub Jelinek wrote: > a) on x86-64 this is unnecessary, all x86-64's have -msse2 by default > b) -msse2 implies -msse > c) if you use -msse2 in CFLAGS for all files, you can't run the latest > GIMP on e.g. Pentium2, or pre-x86_64 AMD chips. > -msse2 should be ONLY used on sources that have SSE/SSE2 stuff in it, > and GIMP should make sure that no routine from those sources will be > ever called on pre-SSE2 chips This sounds like a big pain ... shouldn't there be a way to say "use sse2/sse only for builtins" ? Without that, there is no way to use builtins in single functions; you need to have one file for sse2, one for sse, one for mmx, and do the detection of the current processor somewhere else entirely. Owen
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