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// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "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 THE COPYRIGHT
// OWNER 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.
#ifndef V8_CODE_STUBS_H_
#define V8_CODE_STUBS_H_
namespace v8 {
namespace internal {
// Stub is base classes of all stubs.
class CodeStub BASE_EMBEDDED {
public:
enum Major {
CallFunction,
GenericBinaryOp,
SmiOp,
Compare,
RecordWrite, // Last stub that allows stub calls inside.
ConvertToDouble,
WriteInt32ToHeapNumber,
StackCheck,
UnarySub,
RevertToNumber,
ToBoolean,
Instanceof,
CounterOp,
ArgumentsAccess,
Runtime,
CEntry,
JSEntry,
GetProperty, // ARM only
SetProperty, // ARM only
InvokeBuiltin, // ARM only
JSExit, // ARM only
NUMBER_OF_IDS
};
// Retrieve the code for the stub. Generate the code if needed.
Handle<Code> GetCode();
static Major MajorKeyFromKey(uint32_t key) {
return static_cast<Major>(MajorKeyBits::decode(key));
};
static int MinorKeyFromKey(uint32_t key) {
return MinorKeyBits::decode(key);
};
static const char* MajorName(Major major_key);
virtual ~CodeStub() {}
protected:
static const int kMajorBits = 5;
static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits;
private:
// Generates the assembler code for the stub.
virtual void Generate(MacroAssembler* masm) = 0;
// Returns information for computing the number key.
virtual Major MajorKey() = 0;
virtual int MinorKey() = 0;
// The CallFunctionStub needs to override this so it can encode whether a
// lazily generated function should be fully optimized or not.
virtual InLoopFlag InLoop() { return NOT_IN_LOOP; }
// Returns a name for logging/debugging purposes.
virtual const char* GetName() { return MajorName(MajorKey()); }
#ifdef DEBUG
virtual void Print() { PrintF("%s\n", GetName()); }
#endif
// Computes the key based on major and minor.
uint32_t GetKey() {
ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS);
return MinorKeyBits::encode(MinorKey()) |
MajorKeyBits::encode(MajorKey());
}
bool AllowsStubCalls() { return MajorKey() <= RecordWrite; }
class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {};
class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {};
friend class BreakPointIterator;
};
} } // namespace v8::internal
#endif // V8_CODE_STUBS_H_
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