[squeak-dev] Re: [Pharo-dev] New Cog VMs available

Douglas McPherson djm1329 at san.rr.com
Fri May 22 16:00:50 UTC 2015


ARM stack.v3 and stack.spur VMs updated accordingly. 

(The cog.spur VM for ARM builds and image starts successfully, but segfaults pretty quickly … so I did not upload this one)

Doug

> On May 21, 2015, at 15:25, Eliot Miranda <eliot.miranda at gmail.com> wrote:
> 
> ... at http://www.mirandabanda.org/files/Cog/VM/VM.r3354 <http://www.mirandabanda.org/files/Cog/VM/VM.r3354>
> 
> CogVM binaries as per VMMaker.oscog-eem.1318/r3354
> 
> Cogit:
> Fix the performance regression on x86 in r3308 VMMaker.oscog-eem.1178 through
> the use of XCHG instruction in CogIA32Compiler>>genPushRegisterArgsForNumArgs:.
> Since SendNumArgsReg is not live with small arity sends it can replace TempReg.
> 
> Spur:
> Fix bad C bug in nextInSortedFreeListLink:given:.  The result
> type must be usqInt, otherwise the list can be wrongly
> terminated and the second compaction pass can segfault.
> 
> Change printFreeChunk:isNextChunk: to printFreeChunk:printAsTreeNode:, and use
> it to implement printSortedFreeList.
> 
> Firm up the checkTraversableSortedFreeList assert routine to check that
> the list is traversable from lastFreeChunk, not just firstFreeChunk.  Make
> checkTraversableSortedFreeList robust in presence of empty sorted free list.
> 
> Slang:
> Make promoteArithmeticTypes:and: obey C99's promotion rules more closely in an
> effort to generate more stable sources.  Types were flipping between sqInt &
> usqInt for variables that were assigned both types, so that one generation
> would produce one type and a subsequent one another (Set/Dictionary hashing?).
> -- 
> best,
> Eliot

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