// Copyright 2011 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_X64_CODE_STUBS_X64_H_
#define V8_X64_CODE_STUBS_X64_H_
#include "ic-inl.h"
#include "type-info.h"
namespace v8 {
namespace internal {
// Compute a transcendental math function natively, or call the
// TranscendentalCache runtime function.
class TranscendentalCacheStub: public CodeStub {
public:
enum ArgumentType {
TAGGED = 0,
UNTAGGED = 1 << TranscendentalCache::kTranscendentalTypeBits
};
explicit TranscendentalCacheStub(TranscendentalCache::Type type,
ArgumentType argument_type)
: type_(type), argument_type_(argument_type) {}
void Generate(MacroAssembler* masm);
private:
TranscendentalCache::Type type_;
ArgumentType argument_type_;
Major MajorKey() { return TranscendentalCache; }
int MinorKey() { return type_ | argument_type_; }
Runtime::FunctionId RuntimeFunction();
void GenerateOperation(MacroAssembler* masm);
};
class UnaryOpStub: public CodeStub {
public:
UnaryOpStub(Token::Value op,
UnaryOverwriteMode mode,
UnaryOpIC::TypeInfo operand_type = UnaryOpIC::UNINITIALIZED)
: op_(op),
mode_(mode),
operand_type_(operand_type) {
}
private:
Token::Value op_;
UnaryOverwriteMode mode_;
// Operand type information determined at runtime.
UnaryOpIC::TypeInfo operand_type_;
virtual void PrintName(StringStream* stream);
class ModeBits: public BitField<UnaryOverwriteMode, 0, 1> {};
class OpBits: public BitField<Token::Value, 1, 7> {};
class OperandTypeInfoBits: public BitField<UnaryOpIC::TypeInfo, 8, 3> {};
Major MajorKey() { return UnaryOp; }
int MinorKey() {
return ModeBits::encode(mode_)
| OpBits::encode(op_)
| OperandTypeInfoBits::encode(operand_type_);
}
// Note: A lot of the helper functions below will vanish when we use virtual
// function instead of switch more often.
void Generate(MacroAssembler* masm);
void GenerateTypeTransition(MacroAssembler* masm);
void GenerateSmiStub(MacroAssembler* masm);
void GenerateSmiStubSub(MacroAssembler* masm);
void GenerateSmiStubBitNot(MacroAssembler* masm);
void GenerateSmiCodeSub(MacroAssembler* masm,
Label* non_smi,
Label* slow,
Label::Distance non_smi_near = Label::kFar,
Label::Distance slow_near = Label::kFar);
void GenerateSmiCodeBitNot(MacroAssembler* masm,
Label* non_smi,
Label::Distance non_smi_near);
void GenerateHeapNumberStub(MacroAssembler* masm);
void GenerateHeapNumberStubSub(MacroAssembler* masm);
void GenerateHeapNumberStubBitNot(MacroAssembler* masm);
void GenerateHeapNumberCodeSub(MacroAssembler* masm, Label* slow);
void GenerateHeapNumberCodeBitNot(MacroAssembler* masm, Label* slow);
void GenerateGenericStub(MacroAssembler* masm);
void GenerateGenericStubSub(MacroAssembler* masm);
void GenerateGenericStubBitNot(MacroAssembler* masm);
void GenerateGenericCodeFallback(MacroAssembler* masm);
virtual int GetCodeKind() { return Code::UNARY_OP_IC; }
virtual InlineCacheState GetICState() {
return UnaryOpIC::ToState(operand_type_);
}
virtual void FinishCode(Code* code) {
code->set_unary_op_type(operand_type_);
}
};
class BinaryOpStub: public CodeStub {
public:
BinaryOpStub(Token::Value op, OverwriteMode mode)
: op_(op),
mode_(mode),
operands_type_(BinaryOpIC::UNINITIALIZED),
result_type_(BinaryOpIC::UNINITIALIZED) {
ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
}
BinaryOpStub(
int key,
BinaryOpIC::TypeInfo operands_type,
BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED)
: op_(OpBits::decode(key)),
mode_(ModeBits::decode(key)),
operands_type_(operands_type),
result_type_(result_type) { }
private:
enum SmiCodeGenerateHeapNumberResults {
ALLOW_HEAPNUMBER_RESULTS,
NO_HEAPNUMBER_RESULTS
};
Token::Value op_;
OverwriteMode mode_;
// Operand type information determined at runtime.
BinaryOpIC::TypeInfo operands_type_;
BinaryOpIC::TypeInfo result_type_;
virtual void PrintName(StringStream* stream);
// Minor key encoding in 15 bits RRRTTTOOOOOOOMM.
class ModeBits: public BitField<OverwriteMode, 0, 2> {};
class OpBits: public BitField<Token::Value, 2, 7> {};
class OperandTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 9, 3> {};
class ResultTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 12, 3> {};
Major MajorKey() { return BinaryOp; }
int MinorKey() {
return OpBits::encode(op_)
| ModeBits::encode(mode_)
| OperandTypeInfoBits::encode(operands_type_)
| ResultTypeInfoBits::encode(result_type_);
}
void Generate(MacroAssembler* masm);
void GenerateGeneric(MacroAssembler* masm);
void GenerateSmiCode(MacroAssembler* masm,
Label* slow,
SmiCodeGenerateHeapNumberResults heapnumber_results);
void GenerateFloatingPointCode(MacroAssembler* masm,
Label* allocation_failure,
Label* non_numeric_failure);
void GenerateStringAddCode(MacroAssembler* masm);
void GenerateCallRuntimeCode(MacroAssembler* masm);
void GenerateLoadArguments(MacroAssembler* masm);
void GenerateReturn(MacroAssembler* masm);
void GenerateUninitializedStub(MacroAssembler* masm);
void GenerateSmiStub(MacroAssembler* masm);
void GenerateInt32Stub(MacroAssembler* masm);
void GenerateHeapNumberStub(MacroAssembler* masm);
void GenerateOddballStub(MacroAssembler* masm);
void GenerateStringStub(MacroAssembler* masm);
void GenerateBothStringStub(MacroAssembler* masm);
void GenerateGenericStub(MacroAssembler* masm);
void GenerateHeapResultAllocation(MacroAssembler* masm, Label* alloc_failure);
void GenerateRegisterArgsPush(MacroAssembler* masm);
void GenerateTypeTransition(MacroAssembler* masm);
void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm);
virtual int GetCodeKind() { return Code::BINARY_OP_IC; }
virtual InlineCacheState GetICState() {
return BinaryOpIC::ToState(operands_type_);
}
virtual void FinishCode(Code* code) {
code->set_binary_op_type(operands_type_);
code->set_binary_op_result_type(result_type_);
}
friend class CodeGenerator;
};
class StringHelper : public AllStatic {
public:
// Generate code for copying characters using a simple loop. This should only
// be used in places where the number of characters is small and the
// additional setup and checking in GenerateCopyCharactersREP adds too much
// overhead. Copying of overlapping regions is not supported.
static void GenerateCopyCharacters(MacroAssembler* masm,
Register dest,
Register src,
Register count,
bool ascii);
// Generate code for copying characters using the rep movs instruction.
// Copies rcx characters from rsi to rdi. Copying of overlapping regions is
// not supported.
static void GenerateCopyCharactersREP(MacroAssembler* masm,
Register dest, // Must be rdi.
Register src, // Must be rsi.
Register count, // Must be rcx.
bool ascii);
// Probe the symbol table for a two character string. If the string is
// not found by probing a jump to the label not_found is performed. This jump
// does not guarantee that the string is not in the symbol table. If the
// string is found the code falls through with the string in register rax.
static void GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm,
Register c1,
Register c2,
Register scratch1,
Register scratch2,
Register scratch3,
Register scratch4,
Label* not_found);
// Generate string hash.
static void GenerateHashInit(MacroAssembler* masm,
Register hash,
Register character,
Register scratch);
static void GenerateHashAddCharacter(MacroAssembler* masm,
Register hash,
Register character,
Register scratch);
static void GenerateHashGetHash(MacroAssembler* masm,
Register hash,
Register scratch);
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper);
};
// Flag that indicates how to generate code for the stub StringAddStub.
enum StringAddFlags {
NO_STRING_ADD_FLAGS = 0,
// Omit left string check in stub (left is definitely a string).
NO_STRING_CHECK_LEFT_IN_STUB = 1 << 0,
// Omit right string check in stub (right is definitely a string).
NO_STRING_CHECK_RIGHT_IN_STUB = 1 << 1,
// Omit both string checks in stub.
NO_STRING_CHECK_IN_STUB =
NO_STRING_CHECK_LEFT_IN_STUB | NO_STRING_CHECK_RIGHT_IN_STUB
};
class StringAddStub: public CodeStub {
public:
explicit StringAddStub(StringAddFlags flags) : flags_(flags) {}
private:
Major MajorKey() { return StringAdd; }
int MinorKey() { return flags_; }
void Generate(MacroAssembler* masm);
void GenerateConvertArgument(MacroAssembler* masm,
int stack_offset,
Register arg,
Register scratch1,
Register scratch2,
Register scratch3,
Label* slow);
const StringAddFlags flags_;
};
class SubStringStub: public CodeStub {
public:
SubStringStub() {}
private:
Major MajorKey() { return SubString; }
int MinorKey() { return 0; }
void Generate(MacroAssembler* masm);
};
class StringCompareStub: public CodeStub {
public:
StringCompareStub() {}
// Compares two flat ASCII strings and returns result in rax.
static void GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
Register left,
Register right,
Register scratch1,
Register scratch2,
Register scratch3,
Register scratch4);
// Compares two flat ASCII strings for equality and returns result
// in rax.
static void GenerateFlatAsciiStringEquals(MacroAssembler* masm,
Register left,
Register right,
Register scratch1,
Register scratch2);
private:
virtual Major MajorKey() { return StringCompare; }
virtual int MinorKey() { return 0; }
virtual void Generate(MacroAssembler* masm);
static void GenerateAsciiCharsCompareLoop(
MacroAssembler* masm,
Register left,
Register right,
Register length,
Register scratch,
Label* chars_not_equal,
Label::Distance near_jump = Label::kFar);
};
class NumberToStringStub: public CodeStub {
public:
NumberToStringStub() { }
// Generate code to do a lookup in the number string cache. If the number in
// the register object is found in the cache the generated code falls through
// with the result in the result register. The object and the result register
// can be the same. If the number is not found in the cache the code jumps to
// the label not_found with only the content of register object unchanged.
static void GenerateLookupNumberStringCache(MacroAssembler* masm,
Register object,
Register result,
Register scratch1,
Register scratch2,
bool object_is_smi,
Label* not_found);
private:
static void GenerateConvertHashCodeToIndex(MacroAssembler* masm,
Register hash,
Register mask);
Major MajorKey() { return NumberToString; }
int MinorKey() { return 0; }
void Generate(MacroAssembler* masm);
};
class StringDictionaryLookupStub: public CodeStub {
public:
enum LookupMode { POSITIVE_LOOKUP, NEGATIVE_LOOKUP };
StringDictionaryLookupStub(Register dictionary,
Register result,
Register index,
LookupMode mode)
: dictionary_(dictionary), result_(result), index_(index), mode_(mode) { }
void Generate(MacroAssembler* masm);
MUST_USE_RESULT static MaybeObject* GenerateNegativeLookup(
MacroAssembler* masm,
Label* miss,
Label* done,
Register properties,
String* name,
Register r0);
static void GeneratePositiveLookup(MacroAssembler* masm,
Label* miss,
Label* done,
Register elements,
Register name,
Register r0,
Register r1);
private:
static const int kInlinedProbes = 4;
static const int kTotalProbes = 20;
static const int kCapacityOffset =
StringDictionary::kHeaderSize +
StringDictionary::kCapacityIndex * kPointerSize;
static const int kElementsStartOffset =
StringDictionary::kHeaderSize +
StringDictionary::kElementsStartIndex * kPointerSize;
Major MajorKey() { return StringDictionaryNegativeLookup; }
int MinorKey() {
return DictionaryBits::encode(dictionary_.code()) |
ResultBits::encode(result_.code()) |
IndexBits::encode(index_.code()) |
LookupModeBits::encode(mode_);
}
class DictionaryBits: public BitField<int, 0, 4> {};
class ResultBits: public BitField<int, 4, 4> {};
class IndexBits: public BitField<int, 8, 4> {};
class LookupModeBits: public BitField<LookupMode, 12, 1> {};
Register dictionary_;
Register result_;
Register index_;
LookupMode mode_;
};
} } // namespace v8::internal
#endif // V8_X64_CODE_STUBS_X64_H_