org.graalvm.compiler.lir.amd64

Class AMD64ArrayRegionCompareToOp

java.lang.Object

org.graalvm.compiler.lir.LIRInstruction

org.graalvm.compiler.lir.amd64.AMD64LIRInstruction

org.graalvm.compiler.lir.amd64.AMD64ComplexVectorOp

org.graalvm.compiler.lir.amd64.AMD64ArrayRegionCompareToOp

public final class AMD64ArrayRegionCompareToOp
extends AMD64ComplexVectorOp

Emits code to compare two array regions lexicographically, using SIMD instructions where possible. Supported element kinds:

• byte+byte
• char+char
• int+int
• char+byte
• int+byte
• int+char

If the second element kind is smaller than the first, elements are either sign or zero-extended to fit the first element kind, depending on the extendMode parameter.

Nested Class Summary

Nested classes/interfaces inherited from class org.graalvm.compiler.lir.LIRInstruction

LIRInstruction.Alive, LIRInstruction.Def, LIRInstruction.OperandFlag, LIRInstruction.OperandMode, LIRInstruction.State, LIRInstruction.Temp, LIRInstruction.Use

Field Summary

Fields

Modifier and Type	Field and Description
static LIRInstructionClass<AMD64ArrayRegionCompareToOp>	TYPE

Fields inherited from class org.graalvm.compiler.lir.amd64.AMD64ComplexVectorOp

targetDescription, vectorSize

Fields inherited from class org.graalvm.compiler.lir.LIRInstruction

ADDRESS_FLAGS, ALLOWED_FLAGS

Method Summary

Modifier and Type	Method and Description
void	emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm)
static AMD64ArrayRegionCompareToOp	movParamsAndCreate(LIRGeneratorTool tool, JavaKind strideA, JavaKind strideB, Value result, Value arrayA, Value offsetA, Value arrayB, Value offsetB, Value length, Value dynamicStrides, AMD64MacroAssembler.ExtendMode extendMode) Compares array regions of length length in arrayA and arrayB, starting at byte offset offsetA and offsetB, respectively.

Methods inherited from class org.graalvm.compiler.lir.amd64.AMD64ComplexVectorOp

getVectorKind, needsClearUpperVectorRegisters, supports, supportsAVX2AndYMM, supportsAVX512VLBW, supportsAVX512VLBWAndZMM, supportsBMI2

Methods inherited from class org.graalvm.compiler.lir.amd64.AMD64LIRInstruction

emitCode

Methods inherited from class org.graalvm.compiler.lir.LIRInstruction

addStackSlotsToTemporaries, destroysCallerSavedRegisters, forEachAlive, forEachAlive, forEachInput, forEachInput, forEachOutput, forEachOutput, forEachRegisterHint, forEachRegisterHint, forEachState, forEachState, forEachState, forEachState, forEachTemp, forEachTemp, getComment, getLIRInstructionClass, getPosition, hashCode, hasOperands, hasState, id, isLoadConstantOp, isMoveOp, isValueMoveOp, name, setComment, setId, setPosition, toString, toString, toStringWithIdPrefix, verify, visitEachAlive, visitEachAlive, visitEachInput, visitEachInput, visitEachOutput, visitEachOutput, visitEachState, visitEachState, visitEachTemp, visitEachTemp

Methods inherited from class java.lang.Object

clone, equals, getClass, notify, notifyAll, wait, wait, wait

Field Detail

TYPE

public static final LIRInstructionClass<AMD64ArrayRegionCompareToOp> TYPE

Method Detail

movParamsAndCreate

public static AMD64ArrayRegionCompareToOp movParamsAndCreate(LIRGeneratorTool tool,
                                                             JavaKind strideA,
                                                             JavaKind strideB,
                                                             Value result,
                                                             Value arrayA,
                                                             Value offsetA,
                                                             Value arrayB,
                                                             Value offsetB,
                                                             Value length,
                                                             Value dynamicStrides,
                                                             AMD64MacroAssembler.ExtendMode extendMode)

Compares array regions of length length in arrayA and arrayB, starting at byte offset offsetA and offsetB, respectively.

Parameters:

strideA - element size of arrayA. May be one of JavaKind.Byte, JavaKind.Char or JavaKind.Int. strideA must be greater than or equal to strideB!

strideB - element size of arrayB. May be one of JavaKind.Byte, JavaKind.Char or JavaKind.Int. strideB must be less than or equal to strideA!

offsetA - byte offset to be added to arrayA. Must include the array base offset!

offsetB - byte offset to be added to arrayB. Must include the array base offset!

length - length (number of array slots in respective array's stride) of the region to compare.

extendMode - integer extension mode for arrayB.

dynamicStrides - dynamic stride dispatch as described in StrideUtil.

emitCode

public void emitCode(CompilationResultBuilder crb,
                     AMD64MacroAssembler masm)

Specified by:

emitCode in class AMD64LIRInstruction