[Vm-dev] VM Maker: VMMaker.oscog-eem.1191.mcz
commits at source.squeak.org
commits at source.squeak.org
Tue Apr 14 03:06:03 UTC 2015
Eliot Miranda uploaded a new version of VMMaker to project VM Maker:
http://source.squeak.org/VMMaker/VMMaker.oscog-eem.1191.mcz
==================== Summary ====================
Name: VMMaker.oscog-eem.1191
Author: eem
Time: 13 April 2015, 8:04:19.77 pm
UUID: d9d44898-0ffb-47de-82c8-95e5266149a4
Ancestors: VMMaker.oscog-eem.1190
Fix var op var unsafe byte at:. Result must be
converted to SmallInteger.
=============== Diff against VMMaker.oscog-eem.1190 ===============
Item was changed:
----- Method: StackToRegisterMappingCogit>>genBinaryConstOpVarInlinePrimitive: (in category 'inline primitive generators') -----
genBinaryConstOpVarInlinePrimitive: prim
"Const op var version of binary inline primitives."
"SistaV1: 248 11111000 iiiiiiii mjjjjjjj Call Primitive #iiiiiiii + (jjjjjjj * 256) m=1 means inlined primitive, no hard return after execution.
See EncoderForSistaV1's class comment and StackInterpreter>>#binaryInlinePrimitive:"
| ra val untaggedVal adjust |
ra := self allocateOneRegister.
self ssTop popToReg: ra.
self ssPop: 1.
val := self ssTop constant.
self ssPop: 1.
untaggedVal := val - objectMemory smallIntegerTag.
prim caseOf: {
"0 through 6, +, -, *, /, //, \\, quo:, SmallInteger op SmallInteger => SmallInteger, no overflow"
[0] -> [self AddCq: untaggedVal R: ra].
[1] -> [self MoveCq: val R: TempReg.
self SubR: ra R: TempReg.
objectRepresentation genAddSmallIntegerTagsTo: TempReg.
self MoveR: TempReg R: ra].
[2] -> [objectRepresentation genRemoveSmallIntegerTagsInScratchReg: ra.
self MoveCq: (objectMemory integerValueOf: val) R: TempReg.
self MulR: TempReg R: ra.
objectRepresentation genAddSmallIntegerTagsTo: ra].
"2016 through 2019, bitAnd:, bitOr:, bitXor, bitShift:, SmallInteger op SmallInteger => SmallInteger, no overflow"
"2032 through 2037, >, <, >=, <=. =, ~=, SmallInteger op SmallInteger => Boolean (flags?? then in jump bytecodes if ssTop is a flags value, just generate the instruction!!!!)"
[32] -> [ self CmpCq: val R: ra.
self genBinaryInlineComparison: JumpGreater opFalse: JumpLess destReg: ra ].
[33] -> [ self CmpCq: val R: ra.
self genBinaryInlineComparison: JumpLess opFalse: JumpGreater destReg: ra ].
[34] -> [ self CmpCq: val R: ra.
self genBinaryInlineComparison: JumpGreaterOrEqual opFalse: JumpLessOrEqual destReg: ra ].
[35] -> [ self CmpCq: val R: ra.
self genBinaryInlineComparison: JumpLessOrEqual opFalse: JumpGreaterOrEqual destReg: ra ].
[36] -> [ self CmpCq: val R: ra.
self genBinaryInlineComparison: JumpZero opFalse: JumpNonZero destReg: ra ].
[37] -> [ self CmpCq: val R: ra.
self genBinaryInlineComparison: JumpNonZero opFalse: JumpZero destReg: ra ].
"2064 through 2068, Pointer Object>>at:, Byte Object>>at:, Short16 Word Object>>at: LongWord32 Object>>at: Quad64Word Object>>at:. obj op 0-rel SmallInteger => oop"
[64] -> [objectRepresentation genConvertSmallIntegerToIntegerInReg: ra.
adjust := (objectMemory baseHeaderSize >> objectMemory shiftForWord) - 1. "shift by baseHeaderSize and then move from 1 relative to zero relative"
adjust ~= 0 ifTrue: [ self AddCq: adjust R: ra. ].
self annotate: (self MoveCw: val R: TempReg) objRef: val.
self MoveXwr: ra R: TempReg R: ra].
[65] -> [objectRepresentation genConvertSmallIntegerToIntegerInReg: ra.
adjust := objectMemory baseHeaderSize - 1. "shift by baseHeaderSize and then move from 1 relative to zero relative"
self AddCq: adjust R: ra.
self annotate: (self MoveCw: val R: TempReg) objRef: val.
+ self MoveXbr: ra R: TempReg R: ra.
+ objectRepresentation genConvertIntegerToSmallIntegerInReg: ra]
- self MoveXbr: ra R: TempReg R: ra]
-
}
otherwise: [^EncounteredUnknownBytecode].
self ssPushRegister: ra.
^0!
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