Re: FOSDEM thoughts
[I'm reposting from an account that gets along with the debian list
server -- sorry for those who get dups]
Roman Zippel wrote:
> On Tuesday 4. March 2008, Wouter Verhelst wrote:
>> A hybrid port would just emit two opcodes in such a case, of course.
>> This will indeed degrade performance slightly.
> The incompabilities are all over the place, we would be basically restricted
> to a very basic instruction set and due to the floating point differences it
> wouldn't even be compatible with the current ABI. I'm not overly optimistic
> that a few optimized libraries would save us, e.g. scripting languages are
> already slow enough right now.
With respect to Floating Point there are differences within the Coldfire
V4 family. The M547x/M548x have the FPU you have been discussing. The
M5445x doesn't have any FPU hardware and requires everything to be
compiled with softfloat.