com.oracle.graal.lir.amd64

Class AMD64ArrayEqualsOp

java.lang.Object

com.oracle.graal.lir.LIRInstruction

com.oracle.graal.lir.amd64.AMD64LIRInstruction

com.oracle.graal.lir.amd64.AMD64ArrayEqualsOp

public final class AMD64ArrayEqualsOp
extends AMD64LIRInstruction

Emits code which compares two arrays of the same length. If the CPU supports any vector instructions specialized code is emitted to leverage these instructions.

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.graal.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
protected Value	array1Value
protected Value	array2Value
private int	arrayBaseOffset
private int	arrayIndexScale
private Kind	kind
protected Value	lengthValue
protected Value	resultValue
private static int	SSE4_1_VECTOR_SIZE Vector size used in emitSSE41Compare(com.oracle.graal.lir.asm.CompilationResultBuilder, com.oracle.graal.asm.amd64.AMD64MacroAssembler, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, com.oracle.graal.asm.Label, com.oracle.graal.asm.Label).
protected Value	temp1
protected Value	temp2
protected Value	temp3
protected Value	temp4
static LIRInstructionClass<AMD64ArrayEqualsOp>	TYPE
private static int	VECTOR_SIZE Vector size used in emit8ByteCompare(com.oracle.graal.lir.asm.CompilationResultBuilder, com.oracle.graal.asm.amd64.AMD64MacroAssembler, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, com.oracle.graal.asm.Label, com.oracle.graal.asm.Label).
protected Value	vectorTemp1
protected Value	vectorTemp2

Fields inherited from class com.oracle.graal.lir.LIRInstruction

ADDRESS_FLAGS, ALLOWED_FLAGS

Constructor Summary

Constructors

Constructor and Description
AMD64ArrayEqualsOp(LIRGeneratorTool tool, Kind kind, Value result, Value array1, Value array2, Value length)

Method Summary

Modifier and Type	Method and Description
private void	emit8ByteCompare(CompilationResultBuilder crb, AMD64MacroAssembler masm, Register result, Register array1, Register array2, Register length, Label trueLabel, Label falseLabel) Emits code that uses 8-byte vector compares.
void	emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm)
private void	emitSSE41Compare(CompilationResultBuilder crb, AMD64MacroAssembler masm, Register result, Register array1, Register array2, Register length, Label trueLabel, Label falseLabel) Emits code that uses SSE4.1 128-bit (16-byte) vector compares.
private void	emitTailCompares(AMD64MacroAssembler masm, Register result, Register array1, Register array2, Register length, Label trueLabel, Label falseLabel) Emits code to compare the remaining 1 to 4 bytes.
private static boolean	supportsSSE41(TargetDescription target) Returns if the underlying AMD64 architecture supports SSE 4.1 instructions.

Methods inherited from class com.oracle.graal.lir.amd64.AMD64LIRInstruction

emitCode

Methods inherited from class com.oracle.graal.lir.LIRInstruction

destroysCallerSavedRegisters, forEachAlive, forEachAlive, forEachInput, forEachInput, forEachOutput, forEachOutput, forEachRegisterHint, forEachRegisterHint, forEachState, forEachState, forEachState, forEachState, forEachTemp, forEachTemp, getLIRInstructionClass, hasOperands, hasState, id, name, setId, toString, toStringWithIdPrefix, verify, visitEachAlive, visitEachAlive, visitEachInput, visitEachInput, visitEachOutput, visitEachOutput, visitEachState, visitEachState, visitEachTemp, visitEachTemp

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

TYPE

public static final LIRInstructionClass<AMD64ArrayEqualsOp> TYPE

kind

private final Kind kind

arrayBaseOffset

private final int arrayBaseOffset

arrayIndexScale

private final int arrayIndexScale

resultValue

protected Value resultValue

array1Value

protected Value array1Value

array2Value

protected Value array2Value

lengthValue

protected Value lengthValue

temp1

protected Value temp1

temp2

protected Value temp2

temp3

protected Value temp3

temp4

protected Value temp4

vectorTemp1

protected Value vectorTemp1

vectorTemp2

protected Value vectorTemp2

SSE4_1_VECTOR_SIZE

private static final int SSE4_1_VECTOR_SIZE

Vector size used in emitSSE41Compare(com.oracle.graal.lir.asm.CompilationResultBuilder, com.oracle.graal.asm.amd64.AMD64MacroAssembler, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, com.oracle.graal.asm.Label, com.oracle.graal.asm.Label).

See Also:

Constant Field Values

VECTOR_SIZE

private static final int VECTOR_SIZE

Vector size used in emit8ByteCompare(com.oracle.graal.lir.asm.CompilationResultBuilder, com.oracle.graal.asm.amd64.AMD64MacroAssembler, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, jdk.internal.jvmci.code.Register, com.oracle.graal.asm.Label, com.oracle.graal.asm.Label).

See Also:

Constant Field Values

Constructor Detail

AMD64ArrayEqualsOp

public AMD64ArrayEqualsOp(LIRGeneratorTool tool,
                          Kind kind,
                          Value result,
                          Value array1,
                          Value array2,
                          Value length)

Method Detail

emitCode

public void emitCode(CompilationResultBuilder crb,
                     AMD64MacroAssembler masm)

Specified by:

emitCode in class AMD64LIRInstruction

supportsSSE41

private static boolean supportsSSE41(TargetDescription target)

Returns if the underlying AMD64 architecture supports SSE 4.1 instructions.

Parameters:

target - target description of the underlying architecture

Returns:

true if the underlying architecture supports SSE 4.1

emitSSE41Compare

private void emitSSE41Compare(CompilationResultBuilder crb,
                              AMD64MacroAssembler masm,
                              Register result,
                              Register array1,
                              Register array2,
                              Register length,
                              Label trueLabel,
                              Label falseLabel)

Emits code that uses SSE4.1 128-bit (16-byte) vector compares.

emit8ByteCompare

private void emit8ByteCompare(CompilationResultBuilder crb,
                              AMD64MacroAssembler masm,
                              Register result,
                              Register array1,
                              Register array2,
                              Register length,
                              Label trueLabel,
                              Label falseLabel)

Emits code that uses 8-byte vector compares.

emitTailCompares

private void emitTailCompares(AMD64MacroAssembler masm,
                              Register result,
                              Register array1,
                              Register array2,
                              Register length,
                              Label trueLabel,
                              Label falseLabel)

Emits code to compare the remaining 1 to 4 bytes.