Re: new Cog VMs available
Posted by
Eliot Miranda-2 on
Feb 07, 2011; 7:00pm
URL: https://forum.world.st/new-Cog-VMs-available-tp3263525p3264824.html
On Mon, Feb 7, 2011 at 6:52 AM, Francois Stephany
<[hidden email]> wrote:
So StackToRegisterMappingCogit should be faster than the other ? If so, why does the SimpleStackBasedCogit still exist ?
Juts in case people find bugs with the StackToRegisterMappingCogit that are not in SimpleStackBasedCogit. SimpleStackBasedCogit is "mature"; we've used it for almost two years at Teleplace, and while I've fixed serious bugs in it in the past month it is quite possibly less buggy than StackToRegisterMappingCogit.
(Sorry but I'm a total newbie)
One can only learn by asking questions. Not knowing, one is not in a position to know whether a question is stupid or not, so one must not be afraid of asking stupid questions if one wants to learn. Please continue.
best,
Eliot
On 07/02/11 15:42, Igor Stasenko wrote:
On 7 February 2011 12:28, Krishsmalltalk
<[hidden email]> wrote:
StackToRegisterMappingCogit maps values to machine registers when generating
code,
while stack-based one uses stack for everything.
Guess that is what is meant..
Register based vms like Parrot will offer more info... As to motivation for
this mapping
a motivation is simple: speed.
Access to CPU registers usually 2-5 orders of magnitude faster than
memory access.
On Feb 7, 2011, at 2:53 PM, Igor Stasenko<[hidden email]> wrote:
On 7 February 2011 09:12, Francois Stephany<[hidden email]>
wrote:
Hi Eliot,
Probably a stupid question but what's the difference between
SimpleStackBasedCogit and c?
SimpleStackBasedCogit maps values to machine registers when generating code,
while stack-based one uses stack for everything.
new Cog VMs are available, SimpleStackBasedCogit @
http://www.mirandabanda.org/files/Cog/VM/VM.r2359/ and
StackToRegisterMappingCogit @
http://www.mirandabanda.org/files/Cog/VM/VM.r2361. I think the new code
generator is ready for prime time now. I fixed a number of bugs over
the past three weeks and we're now using the StackToRegisterMappingCogit
internally at Teleplace.
--
Best regards,
Igor Stasenko AKA sig.
--
http://www.agilitic.com
+32 (0)484/580.322