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Diffstat (limited to 'deps/v8/src/ia32/code-stubs-ia32.h')
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1 files changed, 376 insertions, 0 deletions
diff --git a/deps/v8/src/ia32/code-stubs-ia32.h b/deps/v8/src/ia32/code-stubs-ia32.h new file mode 100644 index 000000000..351636faf --- /dev/null +++ b/deps/v8/src/ia32/code-stubs-ia32.h @@ -0,0 +1,376 @@ +// Copyright 2010 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_IA32_CODE_STUBS_IA32_H_ +#define V8_IA32_CODE_STUBS_IA32_H_ + +#include "macro-assembler.h" +#include "code-stubs.h" +#include "ic-inl.h" + +namespace v8 { +namespace internal { + + +// Compute a transcendental math function natively, or call the +// TranscendentalCache runtime function. +class TranscendentalCacheStub: public CodeStub { + public: + explicit TranscendentalCacheStub(TranscendentalCache::Type type) + : type_(type) {} + void Generate(MacroAssembler* masm); + private: + TranscendentalCache::Type type_; + Major MajorKey() { return TranscendentalCache; } + int MinorKey() { return type_; } + Runtime::FunctionId RuntimeFunction(); + void GenerateOperation(MacroAssembler* masm); +}; + + +class ToBooleanStub: public CodeStub { + public: + ToBooleanStub() { } + + void Generate(MacroAssembler* masm); + + private: + Major MajorKey() { return ToBoolean; } + int MinorKey() { return 0; } +}; + + +// Flag that indicates how to generate code for the stub GenericBinaryOpStub. +enum GenericBinaryFlags { + NO_GENERIC_BINARY_FLAGS = 0, + NO_SMI_CODE_IN_STUB = 1 << 0 // Omit smi code in stub. +}; + + +class GenericBinaryOpStub: public CodeStub { + public: + GenericBinaryOpStub(Token::Value op, + OverwriteMode mode, + GenericBinaryFlags flags, + TypeInfo operands_type) + : op_(op), + mode_(mode), + flags_(flags), + args_in_registers_(false), + args_reversed_(false), + static_operands_type_(operands_type), + runtime_operands_type_(BinaryOpIC::DEFAULT), + name_(NULL) { + if (static_operands_type_.IsSmi()) { + mode_ = NO_OVERWRITE; + } + use_sse3_ = CpuFeatures::IsSupported(SSE3); + ASSERT(OpBits::is_valid(Token::NUM_TOKENS)); + } + + GenericBinaryOpStub(int key, BinaryOpIC::TypeInfo runtime_operands_type) + : op_(OpBits::decode(key)), + mode_(ModeBits::decode(key)), + flags_(FlagBits::decode(key)), + args_in_registers_(ArgsInRegistersBits::decode(key)), + args_reversed_(ArgsReversedBits::decode(key)), + use_sse3_(SSE3Bits::decode(key)), + static_operands_type_(TypeInfo::ExpandedRepresentation( + StaticTypeInfoBits::decode(key))), + runtime_operands_type_(runtime_operands_type), + name_(NULL) { + } + + // Generate code to call the stub with the supplied arguments. This will add + // code at the call site to prepare arguments either in registers or on the + // stack together with the actual call. + void GenerateCall(MacroAssembler* masm, Register left, Register right); + void GenerateCall(MacroAssembler* masm, Register left, Smi* right); + void GenerateCall(MacroAssembler* masm, Smi* left, Register right); + + bool ArgsInRegistersSupported() { + return op_ == Token::ADD || op_ == Token::SUB + || op_ == Token::MUL || op_ == Token::DIV; + } + + private: + Token::Value op_; + OverwriteMode mode_; + GenericBinaryFlags flags_; + bool args_in_registers_; // Arguments passed in registers not on the stack. + bool args_reversed_; // Left and right argument are swapped. + bool use_sse3_; + + // Number type information of operands, determined by code generator. + TypeInfo static_operands_type_; + + // Operand type information determined at runtime. + BinaryOpIC::TypeInfo runtime_operands_type_; + + char* name_; + + const char* GetName(); + +#ifdef DEBUG + void Print() { + PrintF("GenericBinaryOpStub %d (op %s), " + "(mode %d, flags %d, registers %d, reversed %d, type_info %s)\n", + MinorKey(), + Token::String(op_), + static_cast<int>(mode_), + static_cast<int>(flags_), + static_cast<int>(args_in_registers_), + static_cast<int>(args_reversed_), + static_operands_type_.ToString()); + } +#endif + + // Minor key encoding in 18 bits RRNNNFRASOOOOOOOMM. + class ModeBits: public BitField<OverwriteMode, 0, 2> {}; + class OpBits: public BitField<Token::Value, 2, 7> {}; + class SSE3Bits: public BitField<bool, 9, 1> {}; + class ArgsInRegistersBits: public BitField<bool, 10, 1> {}; + class ArgsReversedBits: public BitField<bool, 11, 1> {}; + class FlagBits: public BitField<GenericBinaryFlags, 12, 1> {}; + class StaticTypeInfoBits: public BitField<int, 13, 3> {}; + class RuntimeTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 16, 2> {}; + + Major MajorKey() { return GenericBinaryOp; } + int MinorKey() { + // Encode the parameters in a unique 18 bit value. + return OpBits::encode(op_) + | ModeBits::encode(mode_) + | FlagBits::encode(flags_) + | SSE3Bits::encode(use_sse3_) + | ArgsInRegistersBits::encode(args_in_registers_) + | ArgsReversedBits::encode(args_reversed_) + | StaticTypeInfoBits::encode( + static_operands_type_.ThreeBitRepresentation()) + | RuntimeTypeInfoBits::encode(runtime_operands_type_); + } + + void Generate(MacroAssembler* masm); + void GenerateSmiCode(MacroAssembler* masm, Label* slow); + void GenerateLoadArguments(MacroAssembler* masm); + void GenerateReturn(MacroAssembler* masm); + void GenerateHeapResultAllocation(MacroAssembler* masm, Label* alloc_failure); + void GenerateRegisterArgsPush(MacroAssembler* masm); + void GenerateTypeTransition(MacroAssembler* masm); + + bool IsOperationCommutative() { + return (op_ == Token::ADD) || (op_ == Token::MUL); + } + + void SetArgsInRegisters() { args_in_registers_ = true; } + void SetArgsReversed() { args_reversed_ = true; } + bool HasSmiCodeInStub() { return (flags_ & NO_SMI_CODE_IN_STUB) == 0; } + bool HasArgsInRegisters() { return args_in_registers_; } + bool HasArgsReversed() { return args_reversed_; } + + bool ShouldGenerateSmiCode() { + return HasSmiCodeInStub() && + runtime_operands_type_ != BinaryOpIC::HEAP_NUMBERS && + runtime_operands_type_ != BinaryOpIC::STRINGS; + } + + bool ShouldGenerateFPCode() { + return runtime_operands_type_ != BinaryOpIC::STRINGS; + } + + virtual int GetCodeKind() { return Code::BINARY_OP_IC; } + + virtual InlineCacheState GetICState() { + return BinaryOpIC::ToState(runtime_operands_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, + Register scratch, + bool ascii); + + // Generate code for copying characters using the rep movs instruction. + // Copies ecx characters from esi to edi. Copying of overlapping regions is + // not supported. + static void GenerateCopyCharactersREP(MacroAssembler* masm, + Register dest, // Must be edi. + Register src, // Must be esi. + Register count, // Must be ecx. + Register scratch, // Neither of above. + bool ascii); + + // Probe the symbol table for a two character string. If the string + // requires non-standard hashing a jump to the label not_probed is + // performed and registers c1 and c2 are preserved. In all other + // cases they are clobbered. 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 eax. + static void GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, + Register c1, + Register c2, + Register scratch1, + Register scratch2, + Register scratch3, + Label* not_probed, + 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: + explicit StringCompareStub() { + } + + // Compare two flat ascii strings and returns result in eax after popping two + // arguments from the stack. + static void GenerateCompareFlatAsciiStrings(MacroAssembler* masm, + Register left, + Register right, + Register scratch1, + Register scratch2, + Register scratch3); + + private: + Major MajorKey() { return StringCompare; } + int MinorKey() { return 0; } + + void Generate(MacroAssembler* masm); +}; + + +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: + Major MajorKey() { return NumberToString; } + int MinorKey() { return 0; } + + void Generate(MacroAssembler* masm); + + const char* GetName() { return "NumberToStringStub"; } + +#ifdef DEBUG + void Print() { + PrintF("NumberToStringStub\n"); + } +#endif +}; + + +} } // namespace v8::internal + +#endif // V8_IA32_CODE_STUBS_IA32_H_ |