Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/ReinterpretNode.java @ 15130:ec22234bde0d
Pass more restricted interfaces to ArithmeticLIRLowerable and LocationNode in LIR generation.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Wed, 16 Apr 2014 13:52:43 +0200 |
parents | d5a1206e1923 |
children | 96bb07a5d667 |
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/* * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.nodes.calc; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * The {@code ReinterpretNode} class represents a reinterpreting conversion that changes the stamp * of a primitive value to some other incompatible stamp. The new stamp must have the same width as * the old stamp. */ public class ReinterpretNode extends FloatingNode implements Canonicalizable, ArithmeticLIRLowerable, MemoryArithmeticLIRLowerable { @Input private ValueNode value; public ValueNode value() { return value; } private ReinterpretNode(Kind to, ValueNode value) { this(StampFactory.forKind(to), value); } public ReinterpretNode(Stamp to, ValueNode value) { super(to); assert to instanceof PrimitiveStamp; this.value = value; } public Constant evalConst(Constant... inputs) { assert inputs.length == 1; Constant c = inputs[0]; assert c.getKind().getBitCount() == ((PrimitiveStamp) stamp()).getBits(); switch (c.getKind()) { case Int: if (stamp() instanceof FloatStamp) { return Constant.forFloat(Float.intBitsToFloat(c.asInt())); } else { return c; } case Long: if (stamp() instanceof FloatStamp) { return Constant.forDouble(Double.longBitsToDouble(c.asLong())); } else { return c; } case Float: if (stamp() instanceof IntegerStamp) { return Constant.forInt(Float.floatToRawIntBits(c.asFloat())); } else { return c; } case Double: if (stamp() instanceof IntegerStamp) { return Constant.forLong(Double.doubleToRawLongBits(c.asDouble())); } else { return c; } } throw GraalInternalError.shouldNotReachHere(); } @Override public Node canonical(CanonicalizerTool tool) { if (value.isConstant()) { return ConstantNode.forPrimitive(evalConst(value.asConstant()), graph()); } if (stamp().isCompatible(value.stamp())) { return value; } if (value instanceof ReinterpretNode) { ReinterpretNode reinterpret = (ReinterpretNode) value; return value.graph().unique(new ReinterpretNode(stamp(), reinterpret.value())); } return this; } @Override public void generate(NodeMappableLIRBuilder builder, ArithmeticLIRGenerator gen) { PlatformKind kind = gen.getPlatformKind(stamp()); builder.setResult(this, gen.emitReinterpret(kind, builder.operand(value()))); } @Override public boolean generate(MemoryArithmeticLIRLowerer gen, Access access) { Value result = gen.emitReinterpretMemory(stamp(), access); if (result != null) { gen.setResult(this, result); } return result != null; } public static ValueNode reinterpret(Kind toKind, ValueNode value) { return value.graph().unique(new ReinterpretNode(toKind, value)); } @NodeIntrinsic public static native float reinterpret(@ConstantNodeParameter Kind kind, int value); @NodeIntrinsic public static native int reinterpret(@ConstantNodeParameter Kind kind, float value); @NodeIntrinsic public static native double reinterpret(@ConstantNodeParameter Kind kind, long value); @NodeIntrinsic public static native long reinterpret(@ConstantNodeParameter Kind kind, double value); }