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VM Maker: VMMaker.oscog-eem.2082.mcz

commits-2
 
Eliot Miranda uploaded a new version of VMMaker to project VM Maker:
http://source.squeak.org/VMMaker/VMMaker.oscog-eem.2082.mcz

==================== Summary ====================

Name: VMMaker.oscog-eem.2082
Author: eem
Time: 10 January 2017, 5:24:49.762499 pm
UUID: f987e1db-f4c0-40ed-86ec-7a478cb89067
Ancestors: VMMaker.oscog-eem.2081

Spur:
Go the extra few inches and extract the store check in primitiveSpurStringReplace.

=============== Diff against VMMaker.oscog-eem.2081 ===============

Item was changed:
  ----- Method: InterpreterPrimitives>>primitiveSpurStringReplace (in category 'indexing primitives') -----
  primitiveSpurStringReplace
  "<array> primReplaceFrom: start to: stop with: replacement startingAt: repStart  
  <primitive: 105>"
  <inline: true>
  | array start stop repl replStart arrayFmt arrayLength arrayInstSize replFmt replLength replInstSize srcDelta |
  array := self stackValue: 4.
  start := self stackValue: 3.
  stop := self stackValue: 2.
  repl := self stackValue: 1.
  replStart := self stackValue: 0.
 
  ((objectMemory isNonIntegerObject: start)
  or: [(objectMemory isNonIntegerObject: stop)
  or: [(objectMemory isNonIntegerObject: replStart)
  or: [objectMemory isImmediate: repl]]]) ifTrue: "can happen in LgInt copy"
  [^self primitiveFailFor: PrimErrBadArgument].
 
  start := objectMemory integerValueOf: start.
  stop := objectMemory integerValueOf: stop.
  replStart := objectMemory integerValueOf: replStart.
 
  (stop >= start and: [objectMemory isObjImmutable: array]) ifTrue:
  [^self primitiveFailFor: PrimErrNoModification].
 
  arrayFmt := objectMemory formatOf: array.
  arrayLength := objectMemory lengthOf: array format: arrayFmt.
  arrayFmt := objectMemory classFormatFromInstFormat: arrayFmt.
  replFmt := objectMemory formatOf: repl.
  replLength := objectMemory lengthOf: repl format: replFmt.
  replFmt := objectMemory classFormatFromInstFormat: replFmt.
 
  "Array formats (without oddFields bits) must be the same"
  (arrayFmt = replFmt
  and: [arrayFmt < objectMemory firstCompiledMethodFormat]) ifFalse:
  [^self primitiveFailFor: PrimErrInappropriate].
 
+ "N.B. In the below start - 1 to: stop - 1 do:, Slang is intelligent enough to use < instead of <= so avoiding the stop - 1."
  arrayFmt <= objectMemory lastPointerFormat
  ifTrue:
  [arrayInstSize := objectMemory fixedFieldsOf: array format: arrayFmt length: arrayLength.
  replInstSize := objectMemory fixedFieldsOf: repl format: replFmt length: replLength.
  (start >= 1 and: [start - 1 <= stop and: [stop + arrayInstSize <= arrayLength
   and: [replStart >= 1 and: [stop - start + replStart + replInstSize <= replLength]]]]) ifFalse:
  [^self primitiveFailFor: PrimErrBadIndex].
+ start := start + arrayInstSize.
+ stop := stop + arrayInstSize.
+ srcDelta := (replStart + replInstSize) - start.
+ (objectMemory isOldObject: array)
+ ifTrue:
+ [| mustRemember oop |
+ mustRemember := false.
+ start - 1 to: stop - 1 do:
+ [:i |
+ oop := objectMemory fetchPointer: srcDelta + i ofObject: repl.
+ (objectMemory isYoung: oop) ifTrue:
+ [mustRemember := true].
+ objectMemory storePointerUnchecked: i ofObject: array withValue: oop].
+ mustRemember ifTrue:
+ [objectMemory possibleRootStoreInto: array]]
+ ifFalse:
+ [start - 1 to: stop - 1 do:
+ [:i | objectMemory storePointerUnchecked: i ofObject: array withValue: (objectMemory fetchPointer: srcDelta + i ofObject: repl)]]]
- srcDelta := (replStart + replInstSize) - (start + arrayInstSize).
- start + arrayInstSize - 1 to: stop + arrayInstSize - 1 do:
- [:i |
- objectMemory storePointer: i ofObject: array withValue: (objectMemory fetchPointer: srcDelta + i ofObject: repl)]]
  ifFalse:
  [(start >= 1 and: [start - 1 <= stop and: [stop <= arrayLength
   and: [replStart >= 1 and: [stop - start + replStart <= replLength]]]]) ifFalse:
  [^self primitiveFailFor: PrimErrBadIndex].
  srcDelta := replStart - start.
  arrayFmt >= objectMemory firstShortFormat
  ifTrue: "8 & 16-bit word type objects"
  [arrayFmt >= objectMemory firstByteFormat
  ifTrue: "byte-type objects"
  [start - 1 to: stop - 1 do:
  [:i | objectMemory storeByte: i ofObject: array withValue: (objectMemory fetchByte: srcDelta + i ofObject: repl)]]
  ifFalse: "short type objects"
  [start - 1 to: stop - 1 do:
  [:i | objectMemory storeShort16: i ofObject: array withValue: (objectMemory fetchShort16: srcDelta + i ofObject: repl)]]]
  ifFalse: "32 & 64-bit word type objects"
  [arrayFmt >= objectMemory firstLongFormat
  ifTrue: "word-type objects"
  [start - 1 to: stop - 1 do:
  [:i | objectMemory storeLong32: i ofObject: array withValue: (objectMemory fetchLong32: srcDelta + i ofObject: repl)]]
  ifFalse: "long type objects"
  [start - 1 to: stop - 1 do:
  [:i | objectMemory storeLong64: i ofObject: array withValue: (objectMemory fetchLong64: srcDelta + i ofObject: repl)]]]].
  "We might consider comparing stop - start to some value here and using forceInterruptCheck"
 
  self pop: argumentCount "leave rcvr on stack"!

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