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InterpreterPrimitives.class.st
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InterpreterPrimitives.class.st
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"
InterpreterPrimitives implements most of the VM's core primitives. It is the root of the interpreter hierarchy so as to share the core primitives amongst the varioius interpreters.
Instance Variables
argumentCount <Integer>
ffiExceptionResponse <Integer>
inFFIFlags <Integer>
messageSelector <Integer>
newMethod <Integer>
nextProfileTick <Integer>
objectMemory <ObjectMemory> (simulation only)
preemptionYields <Boolean>
primFailCode <Integer>
osErrorCode <Integer>
profileMethod <Integer>
profileProcess <Integer>
profileSemaphore <Integer>
secHasEnvironmentAccess <Integer>
argumentCount
- the number of arguments of the current message
ffiExceptionResponse
- controls system response to exceptions during FFI calls. See primitiveFailForFFIException:at:
inFFIFlags
- flags recording currently only whether the system is in an FFI call
messageSelector
- the oop of the selector of the current message
newMethod
- the oop of the result of looking up the current message
nextProfileTick
- the millisecond clock value of the next profile tick (if profiling is in effect)
objectMemory
- the memory manager and garbage collector that manages the heap
preemptionYields
- a boolean controlling the process primitives. If true (old, incorrect, blue-book semantics) a preempted process is sent to the back of its run-queue. If false, a process preempted by a higher-priority process is put back at the head of its run queue, hence preserving cooperative scheduling within priorities.
primFailCode
- primitive success/failure flag, 0 for success, otherwise the reason code for failure
osErrorCode
- a 64-bit value settable by external primitives conveying arbitrary error codes from the operating system and/or system libraries
profileMethod
- the oop of the method at the time nextProfileTick was reached
profileProcess
- the oop of the activeProcess at the time nextProfileTick was reached
profileSemaphore
- the oop of the semaphore to signal when nextProfileTick is reached
secHasEnvironmentAccess
- the function to call to check if access to the envronment should be granted to primitiveGetenv
"
Class {
#name : #InterpreterPrimitives,
#superclass : #AbstractInterpreter,
#instVars : [
'objectMemory',
'messageSelector',
'argumentCount',
'newMethod',
'primFailCode',
'osErrorCode',
'exceptionPC',
'profileMethod',
'profileProcess',
'profileSemaphore',
'nextProfileTick',
'preemptionYields',
'ffiExceptionResponse'
],
#classVars : [
'CrossedX',
'EndOfRun',
'MillisecondClockMask'
],
#pools : [
'VMBasicConstants',
'VMBytecodeConstants',
'VMClassIndices',
'VMMethodCacheConstants',
'VMObjectIndices',
'VMStackFrameOffsets'
],
#category : #'VMMaker-Interpreter'
}
{ #category : #'C translation' }
InterpreterPrimitives class >> declareCVarsIn: aCCodeGen [
aCCodeGen
var: 'osErrorCode' type: #sqLong;
var: 'exceptionPC' type: #usqInt
]
{ #category : #'C translation' }
InterpreterPrimitives class >> defineAtCompileTime: anObject [
"Override to define at translation time those variables that need to
be defined at compile time only in plugins, but not in the main VM,
because the VM generated is specific to these varables."
anObject isSymbol ifFalse:
[^false].
(#(STACKVM COGVM SPURVM) includes: anObject) ifTrue:
[^false].
^VMBasicConstants namesDefinedAtCompileTime includes: anObject
]
{ #category : #'class initialization' }
InterpreterPrimitives class >> initializeMiscConstants [
"Initialize the hashMultiply constants."
super initializeMiscConstants.
HashMultiplyConstant := 1664525.
HashMultiplyMask := 16rFFFFFFF "(2 raisedTo: 28) - 1"
]
{ #category : #'primitive support' }
InterpreterPrimitives >> asUnsigned: anInteger [
<inline: true>
^self cCode: [anInteger asUnsignedInteger] inSmalltalk: [anInteger bitAnd: objectMemory maxCInteger]
]
{ #category : #'stack access' }
InterpreterPrimitives >> booleanValueOf: obj [
self subclassResponsibility
]
{ #category : #'primitive support' }
InterpreterPrimitives >> cStringOrNullFor: oop [
"Answer either a malloced string with the null-terminated contents of oop if oop is a string,
or the null pointer if oop is nil, or fail. It is the client's responsibility to free the string later."
<api>
<returnTypeC: #'char *'>
<inline: false>
| isString len cString |
<var: 'cString' type: #'char *'>
isString := self isInstanceOfClassByteString: oop.
isString ifFalse:
[oop ~= objectMemory nilObject ifTrue:
[self primitiveFailFor: PrimErrBadArgument].
^0].
len := objectMemory lengthOf: oop.
len = 0 ifTrue:
[^0].
cString := self malloc: len + 1.
cString ifNil:
[self primitiveFailFor: PrimErrNoCMemory.
^0].
self memcpy: cString _: (objectMemory firstIndexableField: oop) _: len.
cString at: len put: 0.
^cString
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> canBeImmutable: oop [
<option: #IMMUTABILITY>
| scheduler processLists schedAssoc |
self assert: (objectMemory isNonImmediate: oop).
"For now we fail the primitive for contexts to we ensure there are no immutable contexts.
Later we can consider having immutable contexts and send cannotReturn callback
when returning to an immutable context. That would mean that setting a context
to immutable would require a divorce and returns to immutable context are
necessarily across stack pages"
(objectMemory isContext: oop) ifTrue: [ ^ false ].
"Weak structures can't be immutable"
(objectMemory isEphemeron: oop) ifTrue: [^ false].
(objectMemory isWeakNonImm: oop) ifTrue: [^ false].
"No clue what is going on for semaphores so they can't be immutable"
(objectMemory isSemaphoreObj: oop) ifTrue: [^ false].
"Simple version of process management: we forbid Process and LinkedList instances to be immutable
as well as the Processor and the array of activeProcess"
schedAssoc := objectMemory splObj: SchedulerAssociation.
schedAssoc = objectMemory nilObject ifTrue: [ ^ true ].
scheduler := objectMemory fetchPointer: ValueIndex ofObject: schedAssoc.
processLists := objectMemory fetchPointer: ProcessListsIndex ofObject: scheduler.
oop = scheduler ifTrue: [ ^ false ].
oop = processLists ifTrue: [ ^ false ].
"Is it a linkedList ?"
(objectMemory classIndexOf: (objectMemory fetchPointer: 1 ofObject: processLists)) = (objectMemory classIndexOf: oop) ifTrue: [ ^ false ].
"is it a Process ?"
(objectMemory classIndexOf: (objectMemory fetchPointer: ActiveProcessIndex ofObject: scheduler)) = (objectMemory classIndexOf: oop) ifTrue: [ ^ false ].
"The rest of the code is relative to process management: the Processor (the active
process scheduler) can't be immutable, as well as all the objects relative to Process management "
"scheduler := self fetchPointer: ValueIndex ofObject: (self splObj: SchedulerAssociation).
processLists := objectMemory fetchPointer: ProcessListsIndex ofObject: scheduler.
((objectMemory formatOf: oop) = objectMemory nonIndexablePointerFormat)
ifFalse:
[ (objectMemory isArrayNonImm: oop) ifFalse: [ ^ true ].
^ (oop = processLists) not ].
(objectMemory numSlotsOf: oop) >= 2 ifFalse: [ ^ true ].
""is the oop the scheduler itself ?""
oop = scheduler ifTrue: [ ^ false ].
1 to: (objectMemory numSlotsOf: processLists) do: [ :i |
""is the oop one of the linked lists ?""
(list := processLists at: i) = oop ifTrue: [^ false].
""is the oop one of the runnable process ?""
first := objectMemory fetchPointer: FirstLinkIndex ofObject: list.
first = objectMemory nilObject ifFalse:
[ last := objectMemory fetchPointer: LastLinkIndex ofObject: list.
link := first.
[ link = last ] whileFalse:
[ link = oop ifTrue: [ ^ false ].
link := objectMemory fetchPointer: NextLinkIndex ofObject: link. ] ] ]."
^ true
]
{ #category : #'process primitive support' }
InterpreterPrimitives >> doWaitSemaphore: sema [
<api>
<returnTypeC: #void>
self doWaitSemaphore: sema reEnterInterpreter: true
]
{ #category : #'primitive support' }
InterpreterPrimitives >> failed [
<api>
<inline: true>
"In C, non-zero is true, so avoid computation by simply answering primFailCode in the C version."
^self cCode: [primFailCode] inSmalltalk: [primFailCode ~= 0]
]
{ #category : #'primitive support' }
InterpreterPrimitives >> floatExponentBits [
"Answer the number of bits in the double-precision exponent. This is an 11-bit field."
<inline: true>
^11
]
{ #category : #'simulation support' }
InterpreterPrimitives >> getenv: aByteStringOrByteArray [
<doNotGenerate>
"The primitiveGetenv: primitive answers nil for undefined variables.
The primitiveGetenv implementation is written to expect getenv: to
answer 0, not nil, for undefined variables. Map nil to 0 for simulation."
"aByteStringOrByteArray is probably null terminated, convert to non-null-terminated"
^(self primitiveGetenv: (self asString: aByteStringOrByteArray)) ifNil: [0]
]
{ #category : #'primitive support' }
InterpreterPrimitives >> initPrimCall [
"Set the failure code/success flag in preparation for calling a primitve.
If primFailCode is non-zero a primitive has failed. If primFailCode is
greater than one then its value indicates the reason for failure."
<inline: true>
primFailCode := 0
]
{ #category : #initialization }
InterpreterPrimitives >> initialize [
"Here we can initialize the variables C initializes to zero. #initialize methods do /not/ get translated."
argumentCount := primFailCode := nextProfileTick := osErrorCode := exceptionPC := ffiExceptionResponse := 0
]
{ #category : #'simulation support' }
InterpreterPrimitives >> ioGetCurrentWorkingDirectory: aCStringHolder maxLength: maxLength [
<doNotGenerate>
| anEncodedString |
anEncodedString := FileLocator workingDirectory fullName utf8Encoded.
aCStringHolder object
replaceFrom: 1
to: anEncodedString size
with: anEncodedString
startingAt: 1.
"No Error"
^ 0
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> isAppropriateForCopyObject: oop [
^objectMemory isPointersNonImm: oop
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isDirectAlien: oop [
^(self sizeFieldOfAlien: oop) > 0
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isFinite: aDouble [
<var: #aDouble type: #double>
<inline: true>
^aDouble - aDouble = 0.0
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isIndirectAlien: oop [
^(self sizeFieldOfAlien: oop) < 0
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isInstanceOfClassArray: oop [
<inline: true>
"N.B. Because Slang always inlines is:instanceOf:compactClassIndex:
(because is:instanceOf:compactClassIndex: has an inline: pragma) the
phrase (objectMemory splObj: ClassArray) is expanded in-place and
is _not_ evaluated if oop has a non-zero CompactClassIndex."
^objectMemory
is: oop
instanceOf: (objectMemory splObj: ClassArray)
compactClassIndex: ClassArrayCompactIndex
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isInstanceOfClassBlockClosure: oop [
<inline: true>
"N.B. Because Slang always inlines is:instanceOf:compactClassIndex:
(because is:instanceOf:compactClassIndex: has an inline: pragma) the
phrase (objectMemory splObj: ClassBlockClosure) is expanded in-place
and is _not_ evaluated if oop has a non-zero CompactClassIndex."
^objectMemory
is: oop
instanceOf: nil
compactClassIndex: ClassFullBlockClosureCompactIndex
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isInstanceOfClassByteString: oop [
<inline: true>
"N.B. Because Slang always inlines is:instanceOf:compactClassIndex:
(because is:instanceOf:compactClassIndex: has an inline: pragma) the
phrase (objectMemory splObj: ClassByteString) is expanded in-place and
is _not_ evaluated if oop has a non-zero CompactClassIndex."
^objectMemory
is: oop
instanceOf: (objectMemory splObj: ClassByteString)
compactClassIndex: ClassByteStringCompactIndex
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isNegativeIntegerValueOf: oop [
"Answer true if integer object is negative.
Fail if object pointed by oop i not an integer."
| ok smallInt |
(objectMemory isIntegerObject: oop) ifTrue:
[smallInt := objectMemory integerValueOf: oop.
^smallInt < 0].
(objectMemory isNonIntegerNonImmediate: oop) ifTrue:
[ok := objectMemory isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargePositiveInteger)
compactClassIndex: ClassLargePositiveIntegerCompactIndex.
ok ifTrue: [^false].
ok := objectMemory isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargeNegativeInteger)
compactClassIndex: ClassLargeNegativeIntegerCompactIndex.
ok ifTrue: [^true]].
self primitiveFail.
^false
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isPointerAlien: oop [
^(self sizeFieldOfAlien: oop) = 0
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isPositiveMachineIntegerObject: oop [
"Answer if oop is a value of an integer in address range, i.e up to the size of a machine word.
The object may be either a positive SmallInteger or a LargePositiveInteger of size <= word size."
| ok |
(objectMemory isIntegerObject: oop) ifTrue:
[^(objectMemory integerValueOf: oop) >= 0].
(objectMemory isNonIntegerImmediate: oop) ifTrue:
[^false].
ok := objectMemory
isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargePositiveInteger)
compactClassIndex: ClassLargePositiveIntegerCompactIndex.
^ok and: [(objectMemory numBytesOfBytes: oop) <= (self sizeof: #'usqIntptr_t')]
]
{ #category : #'primitive support' }
InterpreterPrimitives >> isSignedInteger: integer inRangeForBits: nBits [
"Answer if integer will fit within a variable of nBits, where nBits is 8, 16, 32 or 64.
Signed shift right by nBits - 1 to map in-range values to either 0 or -1.
Add one to map in-range values to 0 or 1.
Perform an unsigned comparison for greater than 1 to eliminate values out of range."
<inline: true>
^self cCode: [(self asUnsigned: (integer signedBitShift: 1 - nBits) + 1) <= 1]
inSmalltalk: [((integer bitShift: 1 - nBits) + 1 bitAnd: objectMemory maxCInteger) <= 1]
]
{ #category : #'primitive support' }
InterpreterPrimitives >> magnitude64BitIntegerFor: magnitude neg: isNegative [
"Return a Large Integer object for the given integer magnitude and sign"
<var: 'magnitude' type: #usqLong>
<var: 'highWord' type: #usqInt>
| newLargeInteger largeClass highWord sz isSmall smallVal |
isSmall := isNegative
ifTrue: [
magnitude <= (objectMemory maxSmallInteger + 1) ]
ifFalse: [ magnitude <= objectMemory maxSmallInteger ].
isSmall ifTrue: [
smallVal := self cCoerceSimple: magnitude to: #sqInt.
isNegative ifTrue: [ smallVal := 0 - smallVal ].
^ objectMemory integerObjectOf: smallVal ].
largeClass := isNegative
ifTrue: [ objectMemory classLargeNegativeInteger ]
ifFalse: [ objectMemory classLargePositiveInteger ].
objectMemory wordSize = 8
ifTrue: [ sz := 8 ]
ifFalse: [
(highWord := magnitude >> 32) = 0
ifTrue: [ sz := 4 ]
ifFalse: [
sz := 5.
(highWord := highWord >> 8) = 0 ifFalse: [
sz := sz + 1.
(highWord := highWord >> 8) = 0 ifFalse: [
sz := sz + 1.
(highWord := highWord >> 8) = 0 ifFalse: [ sz := sz + 1 ] ] ] ] ].
newLargeInteger := objectMemory
instantiateClass: largeClass
indexableSize: sz.
objectMemory
storeLong64: 0
ofObject: newLargeInteger
withValue: (objectMemory byteSwapped64IfBigEndian: magnitude).
^ newLargeInteger
]
{ #category : #'primitive support' }
InterpreterPrimitives >> magnitude64BitValueOf: oop [
"Convert the given object into an integer value.
The object may be either a positive SmallInteger or an eight-byte LargeInteger."
| sz value ok smallIntValue |
<returnTypeC: #usqLong>
<var: #value type: #usqLong>
(objectMemory isIntegerObject: oop) ifTrue:
[smallIntValue := (objectMemory integerValueOf: oop).
smallIntValue < 0 ifTrue: [smallIntValue := 0 - smallIntValue].
^self cCoerce: smallIntValue to: #usqLong].
(objectMemory isNonIntegerImmediate: oop) ifTrue:
[self primitiveFail.
^0].
ok := objectMemory isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargePositiveInteger)
compactClassIndex: ClassLargePositiveIntegerCompactIndex.
ok
ifFalse:
[ok := objectMemory isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargeNegativeInteger)
compactClassIndex: ClassLargeNegativeIntegerCompactIndex.
ok ifFalse:
[self primitiveFail.
^0]].
sz := objectMemory numBytesOfBytes: oop.
sz > (self sizeof: #sqLong) ifTrue:
[self primitiveFail.
^0].
"self cppIf: SPURVM
ifTrue:
[""Memory is 8 byte aligned in Spur and oversized bytes are set to zero, so we can safely fetch 8 bytes""
value := objectMemory byteSwapped64IfBigEndian: (objectMemory fetchLong64: 0 ofObject: oop)]
ifFalse:
["sz > 4
ifTrue: [value := objectMemory byteSwapped64IfBigEndian: (objectMemory fetchLong64: 0 ofObject: oop)]
ifFalse: [value := self cCoerceSimple: (objectMemory byteSwapped32IfBigEndian: (objectMemory fetchLong32: 0 ofObject: oop)) to: #'unsigned int']"]".
^value
]
{ #category : #'primitive support' }
InterpreterPrimitives >> maybeInlinePositive32BitValueOf: oop [
"Convert the given object into an integer value.
The object may be either a positive SmallInteger or a four-byte LargePositiveInteger."
<notOption: #Spur64BitMemoryManager>
<returnTypeC: #'unsigned int'>
| value ok sz |
(objectMemory isIntegerObject: oop) ifTrue:
[value := objectMemory integerValueOf: oop.
(value < 0) ifTrue:
[self primitiveFail. value := 0].
^value].
(objectMemory isNonIntegerImmediate: oop)
ifTrue:
[self primitiveFail.
^0]
ifFalse:
[ok := objectMemory
isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargePositiveInteger)
compactClassIndex: ClassLargePositiveIntegerCompactIndex.
ok ifFalse:
[self primitiveFail.
^0].
sz := objectMemory numBytesOfBytes: oop.
sz > 4 ifTrue:
[self primitiveFail.
^0].
^self cCoerceSimple: (objectMemory byteSwapped32IfBigEndian: (objectMemory fetchLong32: 0 ofObject: oop)) to: #'unsigned int']
]
{ #category : #arithmetic }
InterpreterPrimitives >> multiplySmallInteger: anInteger withSmallInteger: anotherInteger ifOverflow: aBlock [
"Multiply two signed integers and detect signed overflow"
| a b result |
a := objectMemory integerValueOf: anInteger.
b := objectMemory integerValueOf: anotherInteger.
(a > 0
ifTrue: [
b > 0
ifTrue: [ a > (objectMemory maxSmallInteger / b) ]
ifFalse: [ b < (objectMemory minSmallInteger / a) ] ]
ifFalse: [
b > 0
ifTrue: [ a < (objectMemory minSmallInteger / b) ]
ifFalse: [
a ~= 0 and: [ b < (objectMemory maxSmallInteger / a) ] ] ])
ifTrue: aBlock.
result := a * b.
^ objectMemory integerObjectOf: result
]
{ #category : #'simulation support' }
InterpreterPrimitives >> newMethod: oop [
<doNotGenerate>
newMethod := oop
]
{ #category : #'primitive support' }
InterpreterPrimitives >> noInlineSigned32BitValueGutsOf: oop [
"Convert the given object into an integer value.
The object may be a four-byte LargeInteger."
| value negative ok magnitude |
<notOption: #Spur64BitMemoryManager>
<inline: false>
<returnTypeC: #int>
<var: #value type: #int>
<var: #magnitude type: #'unsigned int'>
self deny: objectMemory hasSixtyFourBitImmediates.
self deny: (objectMemory isIntegerObject: oop).
(objectMemory isNonIntegerImmediate: oop) ifTrue:
[self primitiveFail.
^0].
ok := objectMemory
isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargePositiveInteger)
compactClassIndex: ClassLargePositiveIntegerCompactIndex.
ok
ifTrue: [negative := false]
ifFalse:
[negative := true.
ok := objectMemory isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargeNegativeInteger)
compactClassIndex: ClassLargeNegativeIntegerCompactIndex.
ok ifFalse:
[self primitiveFail.
^0]].
(objectMemory numBytesOfBytes: oop) > 4 ifTrue:
[^self primitiveFail].
magnitude := self cCoerceSimple: (objectMemory byteSwapped32IfBigEndian: (objectMemory fetchLong32: 0 ofObject: oop)) to: #'unsigned int'.
(negative
ifTrue: [magnitude > 16r80000000]
ifFalse: [magnitude >= 16r80000000])
ifTrue:
[self primitiveFail.
^0].
negative
ifTrue: [value := 0 - magnitude]
ifFalse: [value := magnitude].
^value
]
{ #category : #'stack access' }
InterpreterPrimitives >> pop: nItems thenPushBool: boolean [
self subclassResponsibility
]
{ #category : #'primitive support' }
InterpreterPrimitives >> positive32BitValueOf: oop [
"Convert the given object into an integer value.
The object may be either a positive SmallInteger or a four-byte LargePositiveInteger."
<api>
<druidExitPoint>
<returnTypeC: #'unsigned int'>
objectMemory hasSixtyFourBitImmediates
ifTrue:
[(objectMemory isIntegerObject: oop) ifTrue:
[| value64 |
value64 := objectMemory integerValueOf: oop.
(value64 < 0
or: [self cCode: [(self cCoerceSimple: value64 to: #'unsigned int') ~= value64]
inSmalltalk: [value64 >> 32 ~= 0]]) ifTrue:
[self primitiveFail. value64 := 0].
^value64].
self primitiveFail.
^0]
ifFalse:
[^self maybeInlinePositive32BitValueOf: oop]
]
{ #category : #'primitive support' }
InterpreterPrimitives >> positive64BitValueOf: oop [
"Convert the given object into an integer value.
The object may be either a positive SmallInteger or an eight-byte LargePositiveInteger."
<api>
<druidExitPoint>
<returnTypeC: #usqLong>
| sz value ok |
<var: #value type: #usqLong>
(objectMemory isIntegerObject: oop) ifTrue:
[(objectMemory integerValueOf: oop) < 0 ifTrue:
[^self primitiveFail].
^objectMemory integerValueOf: oop].
(objectMemory isNonIntegerImmediate: oop) ifTrue:
[self primitiveFail.
^0].
ok := objectMemory
isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargePositiveInteger)
compactClassIndex: ClassLargePositiveIntegerCompactIndex.
ok ifFalse:
[self primitiveFail.
^0].
sz := objectMemory numBytesOfBytes: oop.
sz > (self sizeof: #sqLong) ifTrue:
[self primitiveFail.
^0].
"self cppIf: SPURVM
ifTrue:
[""Memory is 8 byte aligned in Spur and oversized bytes are set to zero, so we can safely fetch 8 bytes""
value := objectMemory byteSwapped64IfBigEndian: (objectMemory fetchLong64: 0 ofObject: oop)]
ifFalse:
["sz > 4
ifTrue: [value := objectMemory byteSwapped64IfBigEndian: (objectMemory fetchLong64: 0 ofObject: oop)]
ifFalse: [value := self cCoerceSimple: (objectMemory byteSwapped32IfBigEndian: (objectMemory fetchLong32: 0 ofObject: oop)) to: #'unsigned int']"]".
^value
]
{ #category : #'primitive support' }
InterpreterPrimitives >> positiveMachineIntegerValueOf: oop [
"Answer a value of an integer in address range, i.e up to the size of a machine word.
The object may be either a positive SmallInteger or a LargePositiveInteger of size <= word size."
<returnTypeC: #'usqIntptr_t'>
<inline: true> "only two callers & one is primitiveNewWithArg"
| value bs ok |
(objectMemory isIntegerObject: oop) ifTrue:
[value := objectMemory integerValueOf: oop.
value < 0 ifTrue: [^self primitiveFail].
^value].
"If not a small integer, exit druid compilation"
self druidExitPoint.
self druidIgnore: [
(objectMemory isNonIntegerImmediate: oop) ifTrue:
[self primitiveFail.
^0].
ok := objectMemory
isClassOfNonImm: oop
equalTo: (objectMemory splObj: ClassLargePositiveInteger)
compactClassIndex: ClassLargePositiveIntegerCompactIndex.
ok ifFalse:
[self primitiveFail.
^0].
bs := objectMemory numBytesOfBytes: oop.
bs > (self sizeof: #'usqIntptr_t') ifTrue:
[self primitiveFail.
^0].
"self cppIf: SPURVM
ifTrue: [""Memory is 8 byte aligned in Spur and oversized bytes are set to zero, so we can safely fetch 8 bytes""
^objectMemory byteSwapped64IfBigEndian: (objectMemory fetchLong64: 0 ofObject: oop)]
ifFalse: ["((self sizeof: #'usqIntptr_t') = 8
and: [bs > 4])
ifTrue:
[^objectMemory byteSwapped64IfBigEndian: (objectMemory fetchLong64: 0 ofObject: oop)]
ifFalse:
[^self cCoerceSimple: (objectMemory byteSwapped32IfBigEndian: (objectMemory fetchLong32: 0 ofObject: oop)) to: #'unsigned int']"]"
].
]
{ #category : #'arithmetic integer primitives' }
InterpreterPrimitives >> primitiveAdd [
<numberOfArguments: 1>
<specialisation: #smallInteger>
<customisedReceiverFor: #smallInteger>
| maybeSmallInteger maybeSmallInteger2 result |
maybeSmallInteger := self stackValue: 0.
maybeSmallInteger2 := self stackValue: 1.
(objectMemory isIntegerObject: maybeSmallInteger)
ifFalse: [ ^ self primitiveFail ].
(objectMemory isIntegerObject: maybeSmallInteger2)
ifFalse: [ ^ self primitiveFail ].
"Check for overflow"
result := self
sumSmallInteger: maybeSmallInteger
withSmallInteger: maybeSmallInteger2
ifOverflow: [ ^ self primitiveFail ].
self pop: 2 thenPush: result
]
{ #category : #'arithmetic largeint primitives' }
InterpreterPrimitives >> primitiveAddLargeIntegers [
"Primitive arithmetic operations for large integers in 64 bit range"
| a b result oopResult aIsNegative bIsNegative resultIsNegative oopArg oopRcvr |
<numberOfArguments: 1>
<export: true>
<var: 'a' type: 'usqLong'>
<var: 'b' type: 'usqLong'>
<var: 'result' type: 'usqLong'>
oopArg := self stackValue: 0.
oopRcvr := self stackValue: 1.
aIsNegative := self isNegativeIntegerValueOf: oopRcvr.
bIsNegative := self isNegativeIntegerValueOf: oopArg.
a := self magnitude64BitValueOf: oopRcvr.
b := self magnitude64BitValueOf: oopArg.
self successful ifFalse:[^nil].
(aIsNegative = bIsNegative)
ifTrue:
["Protect against overflow"
a > (16rFFFFFFFFFFFFFFFF - b) ifTrue: [self primitiveFail. ^nil].
result := a + b.
resultIsNegative := aIsNegative]
ifFalse:
[(a >= b)
ifTrue:
[result := a - b.
resultIsNegative := aIsNegative]
ifFalse:
[result := b - a.
resultIsNegative := bIsNegative]].
oopResult := self magnitude64BitIntegerFor: result neg: resultIsNegative.
self successful ifTrue:[self pop: 2 thenPush: oopResult].
]
{ #category : #'arithmetic integer primitives' }
InterpreterPrimitives >> primitiveAddOld [
<numberOfArguments: 1>
self pop2AndPushIntegerIfOK: (self stackIntegerValue: 1) + (self stackIntegerValue: 0)
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> primitiveAdoptInstance [
"Primitive. Change the class of the argument to make it an instance of the receiver
given that the format of the receiver matches the format of the argument's class.
Fail if receiver or argument are SmallIntegers, or the receiver is an instance of a
compact class and the argument isn't, or when the argument's class is compact and
the receiver isn't, or when the format of the receiver is different from the format of
the argument's class, or when the arguments class is fixed and the receiver's size
differs from the size that an instance of the argument's class should have."
<maycallback>
| rcvr arg err |
arg := self stackTop.
rcvr := self stackValue: 1.
((objectMemory isImmediate: arg)
or: [argumentCount > 1
and: [(objectMemory isImmediate: rcvr)
or: [(self objCouldBeClassObj: rcvr) not]]]) ifTrue:
[^self primitiveFailFor: PrimErrBadArgument].
err := objectMemory changeClassOf: arg to: rcvr.
err = 0
ifTrue:
["Flush at cache because rcvr's class has changed."
self flushAtCache.
self pop: self methodArgumentCount]
ifFalse:
["changeClassOf:to: answers errors as if rcvr (the class) is an argument..."
err = PrimErrBadReceiver
ifTrue:
[err := PrimErrBadArgument]
ifFalse:
[err = PrimErrBadArgument ifTrue:
[err := PrimErrBadReceiver]].
self primitiveFailFor: err].
^nil
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> primitiveAllInstances [
"Answer an array of all instances of the receiver that exist
when the primitive is called, excluding any that may be
garbage collected as a side effect of allocating the result array."
<numberOfArguments: 0>
<export: true>
| result |
result := objectMemory allInstancesOf: self stackTop.
(objectMemory isIntegerObject: result) ifTrue:
[objectMemory growToAccomodateContainerWithNumSlots: (objectMemory integerValueOf: result).
result := objectMemory allInstancesOf: self stackTop.
(objectMemory isIntegerObject: result) ifTrue:
[^self primitiveFailFor: PrimErrNoMemory]].
self pop: argumentCount+1 thenPush: result
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> primitiveAllObjects [
"Answer an array of all objects that exist when the primitive
is called, excluding those that may be garbage collected as
a side effect of allocating the result array."
<numberOfArguments: 0>
<export: true>
| result |
result := objectMemory allObjects.
(objectMemory isIntegerObject: result) ifTrue:
[objectMemory growToAccomodateContainerWithNumSlots: (objectMemory integerValueOf: result).
result := objectMemory allObjects.
(objectMemory isIntegerObject: result) ifTrue:
[^self primitiveFailFor: PrimErrNoMemory]].
self pop: argumentCount+1 thenPush: result
]
{ #category : #'arithmetic float primitives' }
InterpreterPrimitives >> primitiveArctan [
"N.B. IMO we should be able to assume the receiver is a float because this primitive is specific to floats. eem 2/13/2017"
<numberOfArguments: 0>
<var: #rcvr type: #double>
| rcvr |
rcvr := self stackFloatValue: 0.
self successful ifTrue:
[self stackTopPut: (objectMemory floatObjectOf:
(self cCode: [rcvr atan]
inSmalltalk: [rcvr arcTan]))]
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> primitiveArrayBecome [
"We must flush the method cache here, to eliminate stale references
to mutated classes and/or selectors."
| arg rcvr ec |
arg := self stackTop.
rcvr := self stackValue: 1.
ec := objectMemory become: rcvr with: arg twoWay: true copyHash: false.
ec = PrimNoErr
ifTrue: [self pop: 1]
ifFalse: [self primitiveFailFor: ec]
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> primitiveArrayBecomeOneWay [
"We must flush the method cache here, to eliminate stale references
to mutated classes and/or selectors."
| arg rcvr ec |
arg := self stackTop.
rcvr := self stackValue: 1.
ec := objectMemory become: rcvr with: arg twoWay: false copyHash: true.
ec = PrimNoErr
ifTrue: [self pop: 1]
ifFalse: [self primitiveFailFor: ec]
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> primitiveArrayBecomeOneWayCopyHash [
"Similar to primitiveArrayBecomeOneWay but accepts a third argument deciding whether to
copy the receiver's elements identity hashes over the argument's elements identity hashes."
| copyHashFlag ec |
self stackTop = objectMemory trueObject
ifTrue: [copyHashFlag := true]
ifFalse:
[self stackTop = objectMemory falseObject
ifTrue: [copyHashFlag := false]
ifFalse:
[self primitiveFailFor: PrimErrBadArgument.
^nil]].
ec := objectMemory
become: (self stackValue: 2)
with: (self stackValue: 1)
twoWay: false
copyHash: copyHashFlag.
ec = PrimNoErr
ifTrue: [self pop: argumentCount]
ifFalse: [self primitiveFailFor: ec]
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> primitiveArrayBecomeOneWayNoCopyHash [
"Similar to primitiveArrayBecomeOneWay but does /not/ copy the receiver's
elements identity hashes over the argument's elements identity hashes."
| arg rcvr ec |
arg := self stackTop.
rcvr := self stackValue: 1.
ec := objectMemory become: rcvr with: arg twoWay: false copyHash: false.
ec = PrimNoErr
ifTrue: [self pop: 1]
ifFalse: [self primitiveFailFor: ec]
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> primitiveAsCharacter [
<numberOfArguments: #(0 1)>
| characterCode characterObject |
characterCode := self stackTop.
((objectMemory isIntegerObject: characterCode)
and: [characterCode := objectMemory integerValueOf: characterCode.
objectMemory isInRangeCharacterCode: characterCode]) ifFalse:
[^self primitiveFailFor: (argumentCount = 0
ifTrue: [PrimErrBadReceiver]
ifFalse: [PrimErrBadArgument])].
characterObject := self characterForAscii: characterCode.
self pop: argumentCount + 1 thenPush: characterObject
]
{ #category : #'arithmetic float primitives' }
InterpreterPrimitives >> primitiveAsFloat [
"N.B. This will answer inexact results for integers with > 53 bits of magnitude."
| rcvr |
<numberOfArguments: 0>
rcvr := self stackTop.
self assert: (objectMemory isIntegerObject: rcvr).
self pop: 1 thenPushFloat: (objectMemory integerValueOf: rcvr) asFloat
]
{ #category : #'indexing primitives' }
InterpreterPrimitives >> primitiveAt [
<accessorDepth: 0>
<numberOfArguments: 1>
self commonAt: false
]
{ #category : #'indexing primitives' }
InterpreterPrimitives >> primitiveAtPut [
<numberOfArguments: 2>
<accessorDepth: 0>
self commonAtPut: false
]
{ #category : #'object access primitives' }
InterpreterPrimitives >> primitiveBehaviorHash [
<numberOfArguments: 0>
| hashOrError |
self assert: ((objectMemory isNonImmediate: self stackTop)
and: [self addressCouldBeClassObj: self stackTop]).
hashOrError := objectMemory ensureBehaviorHash: self stackTop.
hashOrError >= 0
ifTrue: [self pop: argumentCount + 1 thenPushInteger: hashOrError]
ifFalse: [self primitiveFailFor: hashOrError negated]
]
{ #category : #'arithmetic integer primitives' }
InterpreterPrimitives >> primitiveBitAnd [
<numberOfArguments: 1>
<inline: false>
<var: 'integerArgumentValue' type: #usqInt>