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/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(WEBASSEMBLY)
#include <JavaScriptCore/WasmFormat.h>
#include <wtf/ForbidHeapAllocation.h>
namespace JSC {
namespace B3 {
class Origin;
}
namespace Wasm {
class OpcodeOrigin {
WTF_FORBID_HEAP_ALLOCATION;
public:
void dump(PrintStream&) const;
OpcodeOrigin() = default;
friend bool operator==(const OpcodeOrigin&, const OpcodeOrigin&) = default;
OpcodeOrigin(OpType opcode, size_t offset)
{
ASSERT(static_cast<uint32_t>(offset) == offset);
ASSERT(static_cast<OpType>(static_cast<uint8_t>(opcode)) == opcode);
packedData = (static_cast<uint64_t>(opcode) << 32) | offset;
}
OpcodeOrigin(OpType prefix, uint32_t opcode, size_t offset)
{
ASSERT(static_cast<uint32_t>(offset) == offset);
ASSERT(static_cast<OpType>(static_cast<uint8_t>(prefix)) == prefix);
// We must leave the top 4 bits free for tagging inside B3::Origin
// If the spec ever numbers opcodes this aggressively, we will need to consider heap allocation.
ASSERT((opcode & ((1 << 17) - 1)) == opcode);
packedData = (static_cast<uint64_t>(opcode) << 40) | (static_cast<uint64_t>(prefix) << 32) | offset;
}
#if ENABLE(WEBASSEMBLY_OMGJIT)
OpcodeOrigin(B3::Origin);
#endif
OpType opcode() const
{
return static_cast<OpType>(packedData >> 32 & 0xff);
}
Ext1OpType ext1Opcode() const
{
return static_cast<Ext1OpType>(packedData >> 40);
}
ExtSIMDOpType simdOpcode() const
{
return static_cast<ExtSIMDOpType>(packedData >> 40);
}
ExtGCOpType gcOpcode() const
{
return static_cast<ExtGCOpType>(packedData >> 40);
}
ExtAtomicOpType atomicOpcode() const
{
return static_cast<ExtAtomicOpType>(packedData >> 40);
}
size_t location() const
{
return static_cast<uint32_t>(packedData);
}
ASCIILiteral opcodeString() const;
#if ENABLE(WEBASSEMBLY_OMGJIT)
B3::Origin asB3Origin();
#endif
private:
uint64_t packedData { 0 };
};
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY_OMGJIT)
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