Am Donnerstag, 25. April 2013, 18:17:04 schrieb Jeffrey Chimene: > On 04/25/2013 05:26 PM, Bernd Paysan wrote: > > Am Donnerstag, 25. April 2013, 12:17:15 schrieb Jeffrey Chimene: > >> Hi Folks, > >> > >> I didn't see anything about this in the archives. > >> > >> Can anyone tell me why there's no IA64 assembler? > > > > Probably because nobody had the time to write one? > > HI Bernd, > > Thanks for the reply! > > I've been following GForth for a few years. I finally have a use case. > > Background > ======= > I'm interested in porting Node.js to OpenVMS. While I'd prefer > starting w/ Alpha, it's probably better to start w/ IA64. > > To port Node.js, one must also port the V8 javascript engine. V8 > generates machine code at run time along two paths: a sort of "fast > first" path, and a dynamically optimized path. Both paths converge on a > set of common routines all of which converge on a common code generator. > > To bootstrap the porting process to Mips from an existing > architecture (e.g. AMD64), somebody wrote a Mips simulator (C++). This > simulator exports the same function signature as the code generator above. > > Today > === > The simulator is a fine piece of work, but it's written for a RISC > machine. I cannot see converting the simulator out of the box to IA64. I > really think I'm going to need a workbench to figure out the intricacies > of IA64. Fortunately, I don't need the /entire/ IA64 instruction set. > Some instructions are forbidden to user-space code, and other > instructions don't make sense in the context of V8 (e.g. MMX & XMM > instructions). Because this is OpenVMS, the alternate IA32e mode does > not apply. Once I have that subset sort-of, kind-of working, I can > direct attention to the simulator. > > And, what better workbench than Forth? > > Are you interested in the results? Or, is the subsetting a no-go for you?
Several assemblers in Gforth (including x86/x64 and ARM) are subsets, because there are so many additions to the ISAs, so subsets are not a problem at all. Go for it and share the results! -- Bernd Paysan "If you want it done right, you have to do it yourself" http://bernd-paysan.de/
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