[squeak-dev] New Cog VMs available

Eliot Miranda eliot.miranda at gmail.com
Thu Apr 9 21:28:50 UTC 2015


... at http://www.mirandabanda.org/files/Cog/VM/VM.r3308/.

CogVM binaries as per VMMaker.oscog-eem.1178/r3308

Plugins:
Integrate Nicolas' fixes that use positiveMachineIntegerFor: for pointers.

Newspeak:
Print a warning in the method shared under multiple selectors scenario.

Implement outer sends as clean sends just like implicit receiver sends. Add
ObjectRepresentation>>illegalClassTag and use it for initializing and
unlinking
implicit and outer sends.

Newspeak & Sista:
The multiple bytecode set block initial nil counters need
to be specific to the bytecode set in effect.

Spur:
Implement Clement's much better solution for the stale supersend problem.
Place code at the send site for super sends to follow stale forwarded
receivers.  This parallels the interpreter implementation.

Beef up the post-become scan of send sites to
unlink all send sites that link to an invalid class tag.

Cogit:
Optimize StackToRegisterMappingCogit>>genReturnReceiver
to not load ReceiverResultReg if it already contains self.

Revise method map generation to provide multiple send type annotations.  Add
an IsAnnotationExtension annotation type that implicitly has a zero
displacement
and uses its displacement bits to extend the preceeding IsSendCall
annotation.
This allows us to eliminate all the exotic entry-points and keep only the
checked and unchecked entries.

Change IA32's genPushRegisterArgsForNumArgs: to not smash TempReg now that
it
is used in directed super send trampolines.

Use PushCq to pass small integer constants in the trampolines instead of
smashing TempReg, which is now used to hold the directed supersend argument.
Add support for PushCq.  Could use PushCw but on x86 PushCq is a lot
shorter.

Mac builds: Use UTC as the timezone for the build timestamp.  Using the
local
timezone doesn't work :(.
-- 
best,
Eliot
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