Package ghidra.pcode.emu.jit.gen.op

Enum Class PopCountOpGen

java.lang.Object

java.lang.Enum<PopCountOpGen>

ghidra.pcode.emu.jit.gen.op.PopCountOpGen

All Implemented Interfaces:

IntCountUnOpGen<JitPopCountOp>, OpGen<JitPopCountOp>, UnOpGen<JitPopCountOp>, Serializable, Comparable<PopCountOpGen>, Constable

public enum PopCountOpGen
extends Enum<PopCountOpGen>
implements IntCountUnOpGen<JitPopCountOp>

The generator for a popcount.

This uses the unary operator generator and emits an invocation of Integer.bitCount(int) or Long.bitCount(long), depending on the type.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Nested classes/interfaces inherited from interface ghidra.pcode.emu.jit.gen.op.OpGen

OpGen.DeadOpResult, OpGen.LiveOpResult, OpGen.OpResult

Enum Constant Summary

Enum Constants

Enum Constant	Description
GEN	The generator singleton

Method Summary

Modifier and Type	Method	Description
<THIS extends JitCompiledPassage> Emitter<Emitter.Ent<Emitter.Bot,Types.TInt>>	genRunMpInt(Emitter<Emitter.Bot> em, Local<Types.TRef<THIS>> localThis, JitCodeGenerator<THIS> gen, JitPopCountOp op, JitType.MpIntJitType type, Scope scope)	Emit the JVM bytecode to perform the operator with mp-int operands.
boolean	isSigned()	Whether this operator is signed
<N1 extends Emitter.Next, N0 extends Emitter.Ent<N1, Types.TInt>> Emitter<Emitter.Ent<N1,Types.TInt>>	opForInt(Emitter<N0> em, JitType.IntJitType type)	Emit the JVM bytecode to perform the operator with int operands on the stack.
<N1 extends Emitter.Next, N0 extends Emitter.Ent<N1, Types.TLong>> Emitter<Emitter.Ent<N1,Types.TInt>>	opForLong(Emitter<N0> em, JitType.LongJitType type)	Emit the JVM bytecode to perform the operator with long operands on the stack.
static PopCountOpGen	valueOf(String name)	Returns the enum constant of this class with the specified name.
static PopCountOpGen[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface ghidra.pcode.emu.jit.gen.op.IntCountUnOpGen

genRun

Methods inherited from interface ghidra.pcode.emu.jit.gen.op.UnOpGen

ext

Enum Constant Details

GEN

public static final PopCountOpGen GEN

The generator singleton

Method Details

values

public static PopCountOpGen[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static PopCountOpGen valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

isSigned

public boolean isSigned()

Description copied from interface: UnOpGen

Whether this operator is signed

In many cases, the operator itself is not affected by the signedness of the operands; however, if size adjustments to the operands are needed, this can determine how those operands are extended.

Specified by:

isSigned in interface UnOpGen<JitPopCountOp>

Returns:

true for signed, false if not

opForInt

public <N1 extends Emitter.Next,
N0 extends Emitter.Ent<N1,
Types.TInt>>
Emitter<Emitter.Ent<N1,Types.TInt>> opForInt(Emitter<N0> em,
 JitType.IntJitType type)

Description copied from interface: IntCountUnOpGen

Emit the JVM bytecode to perform the operator with int operands on the stack.

Specified by:

opForInt in interface IntCountUnOpGen<JitPopCountOp>

Type Parameters:

N1 - the tail of the incoming stack

N0 - the incoming stack with the input operand on top

Parameters:

em - the emitter typed with the incoming stack

type - the p-code type of the input operand

Returns:

the emitter typed with the resulting stack, i.e., the tail with the result pushed

opForLong

public <N1 extends Emitter.Next,
N0 extends Emitter.Ent<N1,
Types.TLong>>
Emitter<Emitter.Ent<N1,Types.TInt>> opForLong(Emitter<N0> em,
 JitType.LongJitType type)

Description copied from interface: IntCountUnOpGen

Emit the JVM bytecode to perform the operator with long operands on the stack.

Specified by:

opForLong in interface IntCountUnOpGen<JitPopCountOp>

Type Parameters:

N1 - the tail of the incoming stack

N0 - the incoming stack with the input operand on top

Parameters:

em - the emitter typed with the incoming stack

type - the p-code type of the input operand

Returns:

the emitter typed with the resulting stack, i.e., the tail with the result pushed

genRunMpInt

public <THIS extends JitCompiledPassage>
Emitter<Emitter.Ent<Emitter.Bot,Types.TInt>> genRunMpInt(Emitter<Emitter.Bot> em,
 Local<Types.TRef<THIS>> localThis,
 JitCodeGenerator<THIS> gen,
 JitPopCountOp op,
 JitType.MpIntJitType type,
 Scope scope)

Emit the JVM bytecode to perform the operator with mp-int operands.

The strategy here is to simply total the pop count from every leg.

Specified by:

genRunMpInt in interface IntCountUnOpGen<JitPopCountOp>

Type Parameters:

THIS - the type of the generated passage

Parameters:

em - the emitter typed with the empty stack

localThis - a handle to the local holding the this reference

gen - the code generator

op - the p-code op

type - the p-code type of the input operand

scope - a scope for generating temporary local storage

Returns:

the emitter typed with the resulting stack, i.e., with only the result pushed