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package jdk.vm.ci.meta;

import java.nio.ByteBuffer;

Represents a primitive constant value, such as an integer or floating point number, within the compiler and across the compiler/runtime interface.
/** * Represents a primitive constant value, such as an integer or floating point number, within the * compiler and across the compiler/runtime interface. */
public class PrimitiveConstant implements JavaConstant, SerializableConstant { private final JavaKind kind;
The boxed primitive value as a long. For float and double values, this value is the result of Float.floatToRawIntBits(float) and Double.doubleToRawLongBits(double) respectively.
/** * The boxed primitive value as a {@code long}. For {@code float} and {@code double} values, * this value is the result of {@link Float#floatToRawIntBits(float)} and * {@link Double#doubleToRawLongBits(double)} respectively. */
private final long primitive; protected PrimitiveConstant(JavaKind kind, long primitive) { this.primitive = primitive; this.kind = kind; assert kind.isPrimitive() || kind == JavaKind.Illegal; } @Override public JavaKind getJavaKind() { return kind; } @Override public boolean isNull() { return false; } @Override public boolean isDefaultForKind() { return primitive == 0; } @Override public boolean asBoolean() { assert getJavaKind() == JavaKind.Boolean; return primitive != 0L; } @Override public int asInt() { assert getJavaKind().getStackKind() == JavaKind.Int : getJavaKind().getStackKind(); return (int) primitive; } @Override public long asLong() { assert getJavaKind().isNumericInteger(); return primitive; } @Override public float asFloat() { assert getJavaKind() == JavaKind.Float; return Float.intBitsToFloat((int) primitive); } @Override public double asDouble() { assert getJavaKind() == JavaKind.Double; return Double.longBitsToDouble(primitive); } @Override public Object asBoxedPrimitive() { switch (getJavaKind()) { case Byte: return Byte.valueOf((byte) primitive); case Boolean: return Boolean.valueOf(asBoolean()); case Short: return Short.valueOf((short) primitive); case Char: return Character.valueOf((char) primitive); case Int: return Integer.valueOf(asInt()); case Long: return Long.valueOf(asLong()); case Float: return Float.valueOf(asFloat()); case Double: return Double.valueOf(asDouble()); default: throw new IllegalArgumentException("unexpected kind " + getJavaKind()); } } @Override public int getSerializedSize() { return getJavaKind().getByteCount(); } @Override public void serialize(ByteBuffer buffer) { switch (getJavaKind()) { case Byte: case Boolean: buffer.put((byte) primitive); break; case Short: buffer.putShort((short) primitive); break; case Char: buffer.putChar((char) primitive); break; case Int: buffer.putInt(asInt()); break; case Long: buffer.putLong(asLong()); break; case Float: buffer.putFloat(asFloat()); break; case Double: buffer.putDouble(asDouble()); break; default: throw new IllegalArgumentException("unexpected kind " + getJavaKind()); } } @Override public int hashCode() { return (int) (primitive ^ (primitive >>> 32)) * (getJavaKind().ordinal() + 31); } @Override public boolean equals(Object o) { if (o == this) { return true; } if (!(o instanceof PrimitiveConstant)) { return false; } PrimitiveConstant other = (PrimitiveConstant) o; return this.kind.equals(other.kind) && this.primitive == other.primitive; } @Override public String toString() { if (getJavaKind() == JavaKind.Illegal) { return "illegal"; } else { return getJavaKind().getJavaName() + "[" + asBoxedPrimitive() + "|0x" + Long.toHexString(primitive) + "]"; } } }