Update V8 to r5388 as required by WebKit r66666
Change-Id: Ib3c42e9b7226d22c65c7077c543fe31afe62a318
diff --git a/src/x64/code-stubs-x64.h b/src/x64/code-stubs-x64.h
new file mode 100644
index 0000000..18213b9
--- /dev/null
+++ b/src/x64/code-stubs-x64.h
@@ -0,0 +1,389 @@
+// 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_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:
+ 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, Label* on_nan_result);
+};
+
+
+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 = TypeInfo::Unknown())
+ : 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) {
+ ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
+ }
+
+ GenericBinaryOpStub(int key, BinaryOpIC::TypeInfo type_info)
+ : op_(OpBits::decode(key)),
+ mode_(ModeBits::decode(key)),
+ flags_(FlagBits::decode(key)),
+ args_in_registers_(ArgsInRegistersBits::decode(key)),
+ args_reversed_(ArgsReversedBits::decode(key)),
+ static_operands_type_(TypeInfo::ExpandedRepresentation(
+ StaticTypeInfoBits::decode(key))),
+ runtime_operands_type_(type_info),
+ 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.
+
+ // 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, only_numbers %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 17 bits TTNNNFRAOOOOOOOMM.
+ class ModeBits: public BitField<OverwriteMode, 0, 2> {};
+ class OpBits: public BitField<Token::Value, 2, 7> {};
+ class ArgsInRegistersBits: public BitField<bool, 9, 1> {};
+ class ArgsReversedBits: public BitField<bool, 10, 1> {};
+ class FlagBits: public BitField<GenericBinaryFlags, 11, 1> {};
+ class StaticTypeInfoBits: public BitField<int, 12, 3> {};
+ class RuntimeTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 15, 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_)
+ | 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 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,
+ 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,
+ NO_STRING_CHECK_IN_STUB = 1 << 0 // Omit string check in stub.
+};
+
+
+class StringAddStub: public CodeStub {
+ public:
+ explicit StringAddStub(StringAddFlags flags) {
+ string_check_ = ((flags & NO_STRING_CHECK_IN_STUB) == 0);
+ }
+
+ private:
+ Major MajorKey() { return StringAdd; }
+ int MinorKey() { return string_check_ ? 0 : 1; }
+
+ void Generate(MacroAssembler* masm);
+
+ // Should the stub check whether arguments are strings?
+ bool string_check_;
+};
+
+
+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 rax after popping two
+ // arguments from the stack.
+ static void GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
+ Register left,
+ Register right,
+ Register scratch1,
+ Register scratch2,
+ Register scratch3,
+ Register scratch4);
+
+ 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:
+ static void GenerateConvertHashCodeToIndex(MacroAssembler* masm,
+ Register hash,
+ Register mask);
+
+ 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
+};
+
+
+class RecordWriteStub : public CodeStub {
+ public:
+ RecordWriteStub(Register object, Register addr, Register scratch)
+ : object_(object), addr_(addr), scratch_(scratch) { }
+
+ void Generate(MacroAssembler* masm);
+
+ private:
+ Register object_;
+ Register addr_;
+ Register scratch_;
+
+#ifdef DEBUG
+ void Print() {
+ PrintF("RecordWriteStub (object reg %d), (addr reg %d), (scratch reg %d)\n",
+ object_.code(), addr_.code(), scratch_.code());
+ }
+#endif
+
+ // Minor key encoding in 12 bits. 4 bits for each of the three
+ // registers (object, address and scratch) OOOOAAAASSSS.
+ class ScratchBits : public BitField<uint32_t, 0, 4> {};
+ class AddressBits : public BitField<uint32_t, 4, 4> {};
+ class ObjectBits : public BitField<uint32_t, 8, 4> {};
+
+ Major MajorKey() { return RecordWrite; }
+
+ int MinorKey() {
+ // Encode the registers.
+ return ObjectBits::encode(object_.code()) |
+ AddressBits::encode(addr_.code()) |
+ ScratchBits::encode(scratch_.code());
+ }
+};
+
+
+} } // namespace v8::internal
+
+#endif // V8_X64_CODE_STUBS_X64_H_