FPGA Soft Core CPUs
in [Embedded]
|
Prev: PID autotuning - not working for heating application
Next: auto-detecting the resolution of HD44780-based LCD modules ?
From: Antti on 11 Nov 2009 08:16 On Nov 11, 2:49 pm, Rene <a...(a)b.c> wrote: > Mark McDougall wrote: > > For the record, I wouldn't touch Xilinx with a 10-foot clown pole either. > > What is the reason that Your opinion about Xilinx is so negative? > > Thanks in advance, > Rene ise 10.1 project file issues mainly, but not only i had another one also just a few minutes ago, power failure, then ise file corrupted this time recovery did take only 2 hours im not that negative, but X could hire some real programmer, or at least some real testers to checkout their releases Antti
From: mac on 18 Nov 2009 16:40 > And does anybody have any experience with the synthesizable ARM soft > core for FPGA? Unless there's a serious handicap, I'd prefer ARM if > we do soft core, we've already good tools and programmer experience. I expect that ARM instruction set has gotten uglier over time (like everyone else's), but it used to be fairly simple. Simple enough that you could emulate it in software on some other processor, with good performance. If you can emulate an ARM instruction in 10 native instructions, and your native processor is 10x as fast as an FPGA, go with emulation. FPGAs are fun and all, but the don't buy much speed in a serial process like instruction execution for a simple processor.
From: Antti on 21 Nov 2009 17:42
On Nov 18, 11:40 pm, mac <al...(a)theworld.com> wrote: > > And does anybody have any experience with the synthesizable ARM soft > > core for FPGA? Unless there's a serious handicap, I'd prefer ARM if > > we do soft core, we've already good tools and programmer experience. > > I expect that ARM instruction set has gotten uglier over time (like > everyone else's), but it used to be fairly simple. Simple enough that > you could emulate it in software on some other processor, with good > performance. If you can emulate an ARM instruction in 10 native > instructions, and your native processor is 10x as fast as an FPGA, go > with emulation. > > FPGAs are fun and all, but the don't buy much speed in a serial process > like instruction execution for a simple processor. fastest FPGA's go to 1.5GHz fabric speeds. 10x would mean a 15GHz processor :) yes, with 15GHz processor ARM emulation makes sense... Antti |