Move code stubs from codegen*.* files to code-stub*.* files.

src/arm/codegen-arm.h

 // 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
@@ skipping 594 matching lines @@
   friend class JumpTarget;
   friend class Reference;
   friend class FastCodeGenerator;
   friend class FullCodeGenerator;
   friend class FullCodeGenSyntaxChecker;
 
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
 
 
-// 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();
-};
-
-
-class ToBooleanStub: public CodeStub {
- public:
-  explicit ToBooleanStub(Register tos) : tos_(tos) { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  Register tos_;
-  Major MajorKey() { return ToBoolean; }
-  int MinorKey() { return tos_.code(); }
-};
-
-
-class GenericBinaryOpStub : public CodeStub {
- public:
-  GenericBinaryOpStub(Token::Value op,
-                      OverwriteMode mode,
-                      Register lhs,
-                      Register rhs,
-                      int constant_rhs = CodeGenerator::kUnknownIntValue)
-      : op_(op),
-        mode_(mode),
-        lhs_(lhs),
-        rhs_(rhs),
-        constant_rhs_(constant_rhs),
-        specialized_on_rhs_(RhsIsOneWeWantToOptimizeFor(op, constant_rhs)),
-        runtime_operands_type_(BinaryOpIC::DEFAULT),
-        name_(NULL) { }
-
-  GenericBinaryOpStub(int key, BinaryOpIC::TypeInfo type_info)
-      : op_(OpBits::decode(key)),
-        mode_(ModeBits::decode(key)),
-        lhs_(LhsRegister(RegisterBits::decode(key))),
-        rhs_(RhsRegister(RegisterBits::decode(key))),
-        constant_rhs_(KnownBitsForMinorKey(KnownIntBits::decode(key))),
-        specialized_on_rhs_(RhsIsOneWeWantToOptimizeFor(op_, constant_rhs_)),
-        runtime_operands_type_(type_info),
-        name_(NULL) { }
-
- private:
-  Token::Value op_;
-  OverwriteMode mode_;
-  Register lhs_;
-  Register rhs_;
-  int constant_rhs_;
-  bool specialized_on_rhs_;
-  BinaryOpIC::TypeInfo runtime_operands_type_;
-  char* name_;
-
-  static const int kMaxKnownRhs = 0x40000000;
-  static const int kKnownRhsKeyBits = 6;
-
-  // Minor key encoding in 17 bits.
-  class ModeBits: public BitField<OverwriteMode, 0, 2> {};
-  class OpBits: public BitField<Token::Value, 2, 6> {};
-  class TypeInfoBits: public BitField<int, 8, 2> {};
-  class RegisterBits: public BitField<bool, 10, 1> {};
-  class KnownIntBits: public BitField<int, 11, kKnownRhsKeyBits> {};
-
-  Major MajorKey() { return GenericBinaryOp; }
-  int MinorKey() {
-    ASSERT((lhs_.is(r0) && rhs_.is(r1)) ||
-           (lhs_.is(r1) && rhs_.is(r0)));
-    // Encode the parameters in a unique 18 bit value.
-    return OpBits::encode(op_)
-           | ModeBits::encode(mode_)
-           | KnownIntBits::encode(MinorKeyForKnownInt())
-           | TypeInfoBits::encode(runtime_operands_type_)
-           | RegisterBits::encode(lhs_.is(r0));
-  }
-
-  void Generate(MacroAssembler* masm);
-  void HandleNonSmiBitwiseOp(MacroAssembler* masm,
-                             Register lhs,
-                             Register rhs);
-  void HandleBinaryOpSlowCases(MacroAssembler* masm,
-                               Label* not_smi,
-                               Register lhs,
-                               Register rhs,
-                               const Builtins::JavaScript& builtin);
-  void GenerateTypeTransition(MacroAssembler* masm);
-
-  static bool RhsIsOneWeWantToOptimizeFor(Token::Value op, int constant_rhs) {
-    if (constant_rhs == CodeGenerator::kUnknownIntValue) return false;
-    if (op == Token::DIV) return constant_rhs >= 2 && constant_rhs <= 3;
-    if (op == Token::MOD) {
-      if (constant_rhs <= 1) return false;
-      if (constant_rhs <= 10) return true;
-      if (constant_rhs <= kMaxKnownRhs && IsPowerOf2(constant_rhs)) return true;
-      return false;
-    }
-    return false;
-  }
-
-  int MinorKeyForKnownInt() {
-    if (!specialized_on_rhs_) return 0;
-    if (constant_rhs_ <= 10) return constant_rhs_ + 1;
-    ASSERT(IsPowerOf2(constant_rhs_));
-    int key = 12;
-    int d = constant_rhs_;
-    while ((d & 1) == 0) {
-      key++;
-      d >>= 1;
-    }
-    ASSERT(key >= 0 && key < (1 << kKnownRhsKeyBits));
-    return key;
-  }
-
-  int KnownBitsForMinorKey(int key) {
-    if (!key) return 0;
-    if (key <= 11) return key - 1;
-    int d = 1;
-    while (key != 12) {
-      key--;
-      d <<= 1;
-    }
-    return d;
-  }
-
-  Register LhsRegister(bool lhs_is_r0) {
-    return lhs_is_r0 ? r0 : r1;
-  }
-
-  Register RhsRegister(bool lhs_is_r0) {
-    return lhs_is_r0 ? r1 : r0;
-  }
-
-  bool ShouldGenerateSmiCode() {
-    return ((op_ != Token::DIV && op_ != Token::MOD) || specialized_on_rhs_) &&
-        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_);
-  }
-
-  const char* GetName();
-
-#ifdef DEBUG
-  void Print() {
-    if (!specialized_on_rhs_) {
-      PrintF("GenericBinaryOpStub (%s)\n", Token::String(op_));
-    } else {
-      PrintF("GenericBinaryOpStub (%s by %d)\n",
-             Token::String(op_),
-             constant_rhs_);
-    }
-  }
-#endif
-};
-
-
-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 GenerateCopyCharactersLong adds too much
-  // overhead. Copying of overlapping regions is not supported.
-  // Dest register ends at the position after the last character written.
-  static void GenerateCopyCharacters(MacroAssembler* masm,
-                                     Register dest,
-                                     Register src,
-                                     Register count,
-                                     Register scratch,
-                                     bool ascii);
-
-  // Generate code for copying a large number of characters. This function
-  // is allowed to spend extra time setting up conditions to make copying
-  // faster. Copying of overlapping regions is not supported.
-  // Dest register ends at the position after the last character written.
-  static void GenerateCopyCharactersLong(MacroAssembler* masm,
-                                         Register dest,
-                                         Register src,
-                                         Register count,
-                                         Register scratch1,
-                                         Register scratch2,
-                                         Register scratch3,
-                                         Register scratch4,
-                                         Register scratch5,
-                                         int flags);
-
-
-  // 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 r0.
-  // Contents of both c1 and c2 registers are modified. At the exit c1 is
-  // guaranteed to contain halfword with low and high bytes equal to
-  // initial contents of c1 and c2 respectively.
-  static void GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm,
-                                                   Register c1,
-                                                   Register c2,
-                                                   Register scratch1,
-                                                   Register scratch2,
-                                                   Register scratch3,
-                                                   Register scratch4,
-                                                   Register scratch5,
-                                                   Label* not_found);
-
-  // Generate string hash.
-  static void GenerateHashInit(MacroAssembler* masm,
-                               Register hash,
-                               Register character);
-
-  static void GenerateHashAddCharacter(MacroAssembler* masm,
-                                       Register hash,
-                                       Register character);
-
-  static void GenerateHashGetHash(MacroAssembler* masm,
-                                  Register hash);
-
- 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:
-  StringCompareStub() { }
-
-  // Compare two flat ASCII strings and returns result in r0.
-  // Does not use 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);
-};
-
-
-// This stub can do a fast mod operation without using fp.
-// It is tail called from the GenericBinaryOpStub and it always
-// returns an answer.  It never causes GC so it doesn't need a real frame.
-//
-// The inputs are always positive Smis.  This is never called
-// where the denominator is a power of 2.  We handle that separately.
-//
-// If we consider the denominator as an odd number multiplied by a power of 2,
-// then:
-// * The exponent (power of 2) is in the shift_distance register.
-// * The odd number is in the odd_number register.  It is always in the range
-//   of 3 to 25.
-// * The bits from the numerator that are to be copied to the answer (there are
-//   shift_distance of them) are in the mask_bits register.
-// * The other bits of the numerator have been shifted down and are in the lhs
-//   register.
-class IntegerModStub : public CodeStub {
- public:
-  IntegerModStub(Register result,
-                 Register shift_distance,
-                 Register odd_number,
-                 Register mask_bits,
-                 Register lhs,
-                 Register scratch)
-      : result_(result),
-        shift_distance_(shift_distance),
-        odd_number_(odd_number),
-        mask_bits_(mask_bits),
-        lhs_(lhs),
-        scratch_(scratch) {
-    // We don't code these in the minor key, so they should always be the same.
-    // We don't really want to fix that since this stub is rather large and we
-    // don't want many copies of it.
-    ASSERT(shift_distance_.is(r9));
-    ASSERT(odd_number_.is(r4));
-    ASSERT(mask_bits_.is(r3));
-    ASSERT(scratch_.is(r5));
-  }
-
- private:
-  Register result_;
-  Register shift_distance_;
-  Register odd_number_;
-  Register mask_bits_;
-  Register lhs_;
-  Register scratch_;
-
-  // Minor key encoding in 16 bits.
-  class ResultRegisterBits: public BitField<int, 0, 4> {};
-  class LhsRegisterBits: public BitField<int, 4, 4> {};
-
-  Major MajorKey() { return IntegerMod; }
-  int MinorKey() {
-    // Encode the parameters in a unique 16 bit value.
-    return ResultRegisterBits::encode(result_.code())
-           | LhsRegisterBits::encode(lhs_.code());
-  }
-
-  void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "IntegerModStub"; }
-
-  // Utility functions.
-  void DigitSum(MacroAssembler* masm,
-                Register lhs,
-                int mask,
-                int shift,
-                Label* entry);
-  void DigitSum(MacroAssembler* masm,
-                Register lhs,
-                Register scratch,
-                int mask,
-                int shift1,
-                int shift2,
-                Label* entry);
-  void ModGetInRangeBySubtraction(MacroAssembler* masm,
-                                  Register lhs,
-                                  int shift,
-                                  int rhs);
-  void ModReduce(MacroAssembler* masm,
-                 Register lhs,
-                 int max,
-                 int denominator);
-  void ModAnswer(MacroAssembler* masm,
-                 Register result,
-                 Register shift_distance,
-                 Register mask_bits,
-                 Register sum_of_digits);
-
-
-#ifdef DEBUG
-  void Print() { PrintF("IntegerModStub\n"); }
-#endif
-};
-
-
-// This stub can convert a signed int32 to a heap number (double).  It does
-// not work for int32s that are in Smi range!  No GC occurs during this stub
-// so you don't have to set up the frame.
-class WriteInt32ToHeapNumberStub : public CodeStub {
- public:
-  WriteInt32ToHeapNumberStub(Register the_int,
-                             Register the_heap_number,
-                             Register scratch)
-      : the_int_(the_int),
-        the_heap_number_(the_heap_number),
-        scratch_(scratch) { }
-
- private:
-  Register the_int_;
-  Register the_heap_number_;
-  Register scratch_;
-
-  // Minor key encoding in 16 bits.
-  class IntRegisterBits: public BitField<int, 0, 4> {};
-  class HeapNumberRegisterBits: public BitField<int, 4, 4> {};
-  class ScratchRegisterBits: public BitField<int, 8, 4> {};
-
-  Major MajorKey() { return WriteInt32ToHeapNumber; }
-  int MinorKey() {
-    // Encode the parameters in a unique 16 bit value.
-    return IntRegisterBits::encode(the_int_.code())
-           | HeapNumberRegisterBits::encode(the_heap_number_.code())
-           | ScratchRegisterBits::encode(scratch_.code());
-  }
-
-  void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "WriteInt32ToHeapNumberStub"; }
-
-#ifdef DEBUG
-  void Print() { PrintF("WriteInt32ToHeapNumberStub\n"); }
-#endif
-};
-
-
-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,
-                                              Register scratch3,
-                                              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
-};
-
-
-class RecordWriteStub : public CodeStub {
- public:
-  RecordWriteStub(Register object, Register offset, Register scratch)
-      : object_(object), offset_(offset), scratch_(scratch) { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  Register object_;
-  Register offset_;
-  Register scratch_;
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("RecordWriteStub (object reg %d), (offset reg %d),"
-           " (scratch reg %d)\n",
-           object_.code(), offset_.code(), scratch_.code());
-  }
-#endif
-
-  // Minor key encoding in 12 bits. 4 bits for each of the three
-  // registers (object, offset and scratch) OOOOAAAASSSS.
-  class ScratchBits: public BitField<uint32_t, 0, 4> {};
-  class OffsetBits: 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()) |
-           OffsetBits::encode(offset_.code()) |
-           ScratchBits::encode(scratch_.code());
-  }
-};
-
-
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODEGEN_ARM_H_