| 1 | /*
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| 2 | * Copyright (C) 2008 Apple Inc. All rights reserved.
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | *
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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| 14 | * its contributors may be used to endorse or promote products derived
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| 15 | * from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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| 18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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| 19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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| 21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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| 22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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| 23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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| 24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef Instruction_h
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| 30 | #define Instruction_h
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| 31 |
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| 32 | #include "Opcode.h"
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| 33 | #include "ResultType.h"
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| 34 | #include <wtf/VectorTraits.h>
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| 35 |
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| 36 | namespace JSC {
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| 37 |
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| 38 | class JSCell;
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| 39 | class StructureID;
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| 40 | class StructureIDChain;
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| 41 |
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| 42 | struct Instruction {
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| 43 | Instruction(Opcode opcode) { u.opcode = opcode; }
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| 44 | Instruction(int operand)
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| 45 | {
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| 46 | // We have to initialize one of the pointer members to ensure that
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| 47 | // the entire struct is initialised in 64-bit.
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| 48 | u.jsCell = 0;
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| 49 | u.operand = operand;
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| 50 | }
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| 51 |
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| 52 | Instruction(StructureID* structureID) { u.structureID = structureID; }
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| 53 | Instruction(StructureIDChain* structureIDChain) { u.structureIDChain = structureIDChain; }
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| 54 | Instruction(JSCell* jsCell) { u.jsCell = jsCell; }
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| 55 |
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| 56 | union {
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| 57 | Opcode opcode;
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| 58 | int operand;
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| 59 | StructureID* structureID;
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| 60 | StructureIDChain* structureIDChain;
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| 61 | JSCell* jsCell;
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| 62 | ResultType::Type resultType;
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| 63 | } u;
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| 64 | };
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| 65 |
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| 66 | } // namespace JSC
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| 67 |
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| 68 | namespace WTF {
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| 69 |
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| 70 | template<> struct VectorTraits<JSC::Instruction> : VectorTraitsBase<true, JSC::Instruction> { };
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| 71 |
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| 72 | } // namespace WTF
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| 73 |
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| 74 | #endif // Instruction_h
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