Hi, If anybody is interested I've hacked the calling-convention for ARM on JamVM to assume soft-fp. Note, this is a pure guess, as I don't have access to an ARM machine until the weekend!
Thanks, Rob. P.S. The attached files go into src/arm... P.P.S. For anybody who's interested in BE machines, I believe doubles are "pure-big-endian", unlike on LE ARMs (each word is BE, but the words are in LE order). Copying the class_md.h file from src/powerpc to src/arm MAY work, if my guess is again correct. I can test some of this on the weekend, but not before :( On Tue, 12 Oct 2004 09:57:02 +0100, S. Meslin-Weber <[EMAIL PROTECTED]> wrote: > Hi Rob, > > On Mon, Oct 11, 2004 at 12:46:02PM +0100, Robert Lougher wrote: > > The problems that could arise are that I assume floating-point > > emulation is enabled in the kernel (affects calling-convention). I > > Ah, this could cause issues with some linux distributions for ARM > (familiar and OpenZaurus) which are switching to soft-float and not > relying on the kernel to do floating point handling. Note that hybrid > systems with both types requires a set of core libraries for each > *-float so on embedded platforms only one should really be there. > > The rationale for this is convincing: 1000% benchmarked improvement in > float speed. I've had this explained to me (in simple terms): > > "with hard float, a kernel exception gets launched ... which needs > saving status registers and changing privilege rings ... then jump > into kernel ... then handle that ... then jump out of kernel ... > that's slooooooooooow" > > It'd be nice to be able to use JamVM (and other jvms) on these embedded > distributions too :) > > I've verified that SableVM works fine using soft-float too :) > > Cheers, > > Steph > > -- > ================================================================ > Stephane Meslin-Weber Email: [EMAIL PROTECTED] > Software Engineer Web: http://odonata.tangency.co.uk > ================================================================ > > > _______________________________________________ kaffe mailing list [EMAIL PROTECTED] http://kaffe.org/cgi-bin/mailman/listinfo/kaffe
