Contribution of PowerPC port.

src/ppc/lithium-codegen-ppc.h

 // Copyright 2012 the V8 project authors. All rights reserved.
+//
+// Copyright IBM Corp. 2012, 2013. All rights reserved.
+//
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef V8_ARM_LITHIUM_CODEGEN_ARM_H_
-#define V8_ARM_LITHIUM_CODEGEN_ARM_H_
+#ifndef V8_PPC_LITHIUM_CODEGEN_PPC_H_
+#define V8_PPC_LITHIUM_CODEGEN_PPC_H_
 
-#include "src/arm/lithium-arm.h"
+#include "src/ppc/lithium-ppc.h"
 
-#include "src/arm/lithium-gap-resolver-arm.h"
+#include "src/ppc/lithium-gap-resolver-ppc.h"
 #include "src/deoptimizer.h"
 #include "src/lithium-codegen.h"
 #include "src/safepoint-table.h"
 #include "src/scopes.h"
 #include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class LDeferredCode;
 class SafepointGenerator;
 
-class LCodeGen: public LCodeGenBase {
+class LCodeGen : public LCodeGenBase {
  public:
   LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info)
       : LCodeGenBase(chunk, assembler, info),
         deoptimizations_(4, info->zone()),
         deopt_jump_table_(4, info->zone()),
         deoptimization_literals_(8, info->zone()),
         inlined_function_count_(0),
         scope_(info->scope()),
         translations_(info->zone()),
         deferred_(8, info->zone()),
         osr_pc_offset_(-1),
         frame_is_built_(false),
         safepoints_(info->zone()),
         resolver_(this),
         expected_safepoint_kind_(Safepoint::kSimple) {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
   }
 
 
   int LookupDestination(int block_id) const {
     return chunk()->LookupDestination(block_id);
   }
 
   bool IsNextEmittedBlock(int block_id) const {
     return LookupDestination(block_id) == GetNextEmittedBlock();
   }
 
   bool NeedsEagerFrame() const {
-    return GetStackSlotCount() > 0 ||
-        info()->is_non_deferred_calling() ||
-        !info()->IsStub() ||
-        info()->requires_frame();
+    return GetStackSlotCount() > 0 || info()->is_non_deferred_calling() ||
+           !info()->IsStub() || info()->requires_frame();
   }
   bool NeedsDeferredFrame() const {
     return !NeedsEagerFrame() && info()->is_deferred_calling();
   }
 
   LinkRegisterStatus GetLinkRegisterState() const {
     return frame_is_built_ ? kLRHasBeenSaved : kLRHasNotBeenSaved;
   }
 
   // Support for converting LOperands to assembler types.
   // LOperand must be a register.
   Register ToRegister(LOperand* op) const;
 
   // LOperand is loaded into scratch, unless already a register.
   Register EmitLoadRegister(LOperand* op, Register scratch);
 
+  // LConstantOperand must be an Integer32 or Smi
+  void EmitLoadIntegerConstant(LConstantOperand* const_op, Register dst);
+
   // LOperand must be a double register.
-  DwVfpRegister ToDoubleRegister(LOperand* op) const;
+  DoubleRegister ToDoubleRegister(LOperand* op) const;
 
-  // LOperand is loaded into dbl_scratch, unless already a double register.
-  DwVfpRegister EmitLoadDoubleRegister(LOperand* op,
-                                       SwVfpRegister flt_scratch,
-                                       DwVfpRegister dbl_scratch);
-  int32_t ToRepresentation(LConstantOperand* op, const Representation& r) const;
+  intptr_t ToRepresentation(LConstantOperand* op,
+                            const Representation& r) const;
   int32_t ToInteger32(LConstantOperand* op) const;
   Smi* ToSmi(LConstantOperand* op) const;
   double ToDouble(LConstantOperand* op) const;
   Operand ToOperand(LOperand* op);
   MemOperand ToMemOperand(LOperand* op) const;
   // Returns a MemOperand pointing to the high word of a DoubleStackSlot.
   MemOperand ToHighMemOperand(LOperand* op) const;
 
   bool IsInteger32(LConstantOperand* op) const;
   bool IsSmi(LConstantOperand* op) const;
   Handle<Object> ToHandle(LConstantOperand* op) const;
 
   // Try to generate code for the entire chunk, but it may fail if the
   // chunk contains constructs we cannot handle. Returns true if the
   // code generation attempt succeeded.
   bool GenerateCode();
 
   // Finish the code by setting stack height, safepoint, and bailout
   // information on it.
   void FinishCode(Handle<Code> code);
 
   // Deferred code support.
   void DoDeferredNumberTagD(LNumberTagD* instr);
 
   enum IntegerSignedness { SIGNED_INT32, UNSIGNED_INT32 };
-  void DoDeferredNumberTagIU(LInstruction* instr,
-                             LOperand* value,
-                             LOperand* temp1,
-                             LOperand* temp2,
+  void DoDeferredNumberTagIU(LInstruction* instr, LOperand* value,
+                             LOperand* temp1, LOperand* temp2,
                              IntegerSignedness signedness);
 
   void DoDeferredTaggedToI(LTaggedToI* instr);
   void DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr);
   void DoDeferredStackCheck(LStackCheck* instr);
   void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr);
   void DoDeferredStringCharFromCode(LStringCharFromCode* instr);
   void DoDeferredAllocate(LAllocate* instr);
   void DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
-                                       Label* map_check, Label* bool_load);
+                                       Label* map_check);
   void DoDeferredInstanceMigration(LCheckMaps* instr, Register object);
-  void DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr,
-                                   Register result,
-                                   Register object,
-                                   Register index);
+  void DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr, Register result,
+                                   Register object, Register index);
 
   // Parallel move support.
   void DoParallelMove(LParallelMove* move);
   void DoGap(LGap* instr);
 
-  MemOperand PrepareKeyedOperand(Register key,
-                                 Register base,
-                                 bool key_is_constant,
-                                 int constant_key,
-                                 int element_size,
-                                 int shift_size,
+  MemOperand PrepareKeyedOperand(Register key, Register base,
+                                 bool key_is_constant, bool key_is_tagged,
+                                 int constant_key, int element_size_shift,
                                  int base_offset);
 
   // Emit frame translation commands for an environment.
   void WriteTranslation(LEnvironment* environment, Translation* translation);
 
-  // Declare methods that deal with the individual node types.
+// Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
   LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
 #undef DECLARE_DO
 
  private:
   StrictMode strict_mode() const { return info()->strict_mode(); }
 
   Scope* scope() const { return scope_; }
 
-  Register scratch0() { return r9; }
-  LowDwVfpRegister double_scratch0() { return kScratchDoubleReg; }
+  Register scratch0() { return r11; }
+  DoubleRegister double_scratch0() { return kScratchDoubleReg; }
 
   LInstruction* GetNextInstruction();
 
-  void EmitClassOfTest(Label* if_true,
-                       Label* if_false,
-                       Handle<String> class_name,
-                       Register input,
-                       Register temporary,
-                       Register temporary2);
+  void EmitClassOfTest(Label* if_true, Label* if_false,
+                       Handle<String> class_name, Register input,
+                       Register temporary, Register temporary2);
 
   int GetStackSlotCount() const { return chunk()->spill_slot_count(); }
 
   void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); }
 
   void SaveCallerDoubles();
   void RestoreCallerDoubles();
 
   // Code generation passes.  Returns true if code generation should
   // continue.
   void GenerateBodyInstructionPre(LInstruction* instr) V8_OVERRIDE;
   bool GeneratePrologue();
   bool GenerateDeferredCode();
   bool GenerateDeoptJumpTable();
   bool GenerateSafepointTable();
 
   // Generates the custom OSR entrypoint and sets the osr_pc_offset.
   void GenerateOsrPrologue();
 
   enum SafepointMode {
     RECORD_SIMPLE_SAFEPOINT,
     RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS
   };
 
-  int CallCodeSize(Handle<Code> code, RelocInfo::Mode mode);
+  void CallCode(Handle<Code> code, RelocInfo::Mode mode, LInstruction* instr);
 
-  void CallCode(
-      Handle<Code> code,
-      RelocInfo::Mode mode,
-      LInstruction* instr,
-      TargetAddressStorageMode storage_mode = CAN_INLINE_TARGET_ADDRESS);
+  void CallCodeGeneric(Handle<Code> code, RelocInfo::Mode mode,
+                       LInstruction* instr, SafepointMode safepoint_mode);
 
-  void CallCodeGeneric(
-      Handle<Code> code,
-      RelocInfo::Mode mode,
-      LInstruction* instr,
-      SafepointMode safepoint_mode,
-      TargetAddressStorageMode storage_mode = CAN_INLINE_TARGET_ADDRESS);
-
-  void CallRuntime(const Runtime::Function* function,
-                   int num_arguments,
+  void CallRuntime(const Runtime::Function* function, int num_arguments,
                    LInstruction* instr,
                    SaveFPRegsMode save_doubles = kDontSaveFPRegs);
 
-  void CallRuntime(Runtime::FunctionId id,
-                   int num_arguments,
+  void CallRuntime(Runtime::FunctionId id, int num_arguments,
                    LInstruction* instr) {
     const Runtime::Function* function = Runtime::FunctionForId(id);
     CallRuntime(function, num_arguments, instr);
   }
 
   void LoadContextFromDeferred(LOperand* context);
-  void CallRuntimeFromDeferred(Runtime::FunctionId id,
-                               int argc,
-                               LInstruction* instr,
-                               LOperand* context);
+  void CallRuntimeFromDeferred(Runtime::FunctionId id, int argc,
+                               LInstruction* instr, LOperand* context);
 
-  enum R1State {
-    R1_UNINITIALIZED,
-    R1_CONTAINS_TARGET
-  };
+  enum R4State { R4_UNINITIALIZED, R4_CONTAINS_TARGET };
 
   // Generate a direct call to a known function.  Expects the function
-  // to be in r1.
+  // to be in r4.
   void CallKnownFunction(Handle<JSFunction> function,
-                         int formal_parameter_count,
-                         int arity,
-                         LInstruction* instr,
-                         R1State r1_state);
+                         int formal_parameter_count, int arity,
+                         LInstruction* instr, R4State r4_state);
 
   void RecordSafepointWithLazyDeopt(LInstruction* instr,
                                     SafepointMode safepoint_mode);
 
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment,
                                             Safepoint::DeoptMode mode);
-  void DeoptimizeIf(Condition condition,
-                    LEnvironment* environment,
-                    Deoptimizer::BailoutType bailout_type);
-  void DeoptimizeIf(Condition condition, LEnvironment* environment);
+  void DeoptimizeIf(Condition condition, LEnvironment* environment,
+                    Deoptimizer::BailoutType bailout_type, CRegister cr = cr7);
+  void DeoptimizeIf(Condition condition, LEnvironment* environment,
+                    CRegister cr = cr7);
 
-  void AddToTranslation(LEnvironment* environment,
-                        Translation* translation,
-                        LOperand* op,
-                        bool is_tagged,
-                        bool is_uint32,
+  void AddToTranslation(LEnvironment* environment, Translation* translation,
+                        LOperand* op, bool is_tagged, bool is_uint32,
                         int* object_index_pointer,
                         int* dematerialized_index_pointer);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
 
   void PopulateDeoptimizationLiteralsWithInlinedFunctions();
 
   Register ToRegister(int index) const;
-  DwVfpRegister ToDoubleRegister(int index) const;
+  DoubleRegister ToDoubleRegister(int index) const;
 
-  MemOperand BuildSeqStringOperand(Register string,
-                                   LOperand* index,
+  MemOperand BuildSeqStringOperand(Register string, LOperand* index,
                                    String::Encoding encoding);
 
-  void EmitIntegerMathAbs(LMathAbs* instr);
+  void EmitMathAbs(LMathAbs* instr);
+#if V8_TARGET_ARCH_PPC64
+  void EmitInteger32MathAbs(LMathAbs* instr);
+#endif
 
   // Support for recording safepoint and position information.
-  void RecordSafepoint(LPointerMap* pointers,
-                       Safepoint::Kind kind,
-                       int arguments,
-                       Safepoint::DeoptMode mode);
+  void RecordSafepoint(LPointerMap* pointers, Safepoint::Kind kind,
+                       int arguments, Safepoint::DeoptMode mode);
   void RecordSafepoint(LPointerMap* pointers, Safepoint::DeoptMode mode);
   void RecordSafepoint(Safepoint::DeoptMode mode);
-  void RecordSafepointWithRegisters(LPointerMap* pointers,
-                                    int arguments,
+  void RecordSafepointWithRegisters(LPointerMap* pointers, int arguments,
                                     Safepoint::DeoptMode mode);
 
   void RecordAndWritePosition(int position) V8_OVERRIDE;
 
-  static Condition TokenToCondition(Token::Value op, bool is_unsigned);
+  static Condition TokenToCondition(Token::Value op);
   void EmitGoto(int block);
 
   // EmitBranch expects to be the last instruction of a block.
-  template<class InstrType>
-  void EmitBranch(InstrType instr, Condition condition);
-  template<class InstrType>
-  void EmitFalseBranch(InstrType instr, Condition condition);
-  void EmitNumberUntagD(Register input,
-                        DwVfpRegister result,
+  template <class InstrType>
+  void EmitBranch(InstrType instr, Condition condition, CRegister cr = cr7);
+  template <class InstrType>
+  void EmitFalseBranch(InstrType instr, Condition condition,
+                       CRegister cr = cr7);
+  void EmitNumberUntagD(Register input, DoubleRegister result,
                         bool allow_undefined_as_nan,
-                        bool deoptimize_on_minus_zero,
-                        LEnvironment* env,
+                        bool deoptimize_on_minus_zero, LEnvironment* env,
                         NumberUntagDMode mode);
 
   // Emits optimized code for typeof x == "y".  Modifies input register.
   // Returns the condition on which a final split to
   // true and false label should be made, to optimize fallthrough.
-  Condition EmitTypeofIs(Label* true_label,
-                         Label* false_label,
-                         Register input,
+  Condition EmitTypeofIs(Label* true_label, Label* false_label, Register input,
                          Handle<String> type_name);
 
   // Emits optimized code for %_IsObject(x).  Preserves input register.
   // Returns the condition on which a final split to
   // true and false label should be made, to optimize fallthrough.
-  Condition EmitIsObject(Register input,
-                         Register temp1,
-                         Label* is_not_object,
+  Condition EmitIsObject(Register input, Register temp1, Label* is_not_object,
                          Label* is_object);
 
   // Emits optimized code for %_IsString(x).  Preserves input register.
   // Returns the condition on which a final split to
   // true and false label should be made, to optimize fallthrough.
-  Condition EmitIsString(Register input,
-                         Register temp1,
-                         Label* is_not_string,
+  Condition EmitIsString(Register input, Register temp1, Label* is_not_string,
                          SmiCheck check_needed);
 
   // Emits optimized code for %_IsConstructCall().
   // Caller should branch on equal condition.
   void EmitIsConstructCall(Register temp1, Register temp2);
 
   // Emits optimized code to deep-copy the contents of statically known
   // object graphs (e.g. object literal boilerplate).
-  void EmitDeepCopy(Handle<JSObject> object,
-                    Register result,
-                    Register source,
-                    int* offset,
-                    AllocationSiteMode mode);
+  void EmitDeepCopy(Handle<JSObject> object, Register result, Register source,
+                    int* offset, AllocationSiteMode mode);
 
   void EnsureSpaceForLazyDeopt(int space_needed) V8_OVERRIDE;
   void DoLoadKeyedExternalArray(LLoadKeyed* instr);
   void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr);
   void DoLoadKeyedFixedArray(LLoadKeyed* instr);
   void DoStoreKeyedExternalArray(LStoreKeyed* instr);
   void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr);
   void DoStoreKeyedFixedArray(LStoreKeyed* instr);
 
   ZoneList<LEnvironment*> deoptimizations_;
@@ skipping 64 matching lines @@
   LCodeGen* codegen() const { return codegen_; }
   MacroAssembler* masm() const { return codegen_->masm(); }
 
  private:
   LCodeGen* codegen_;
   Label entry_;
   Label exit_;
   Label* external_exit_;
   int instruction_index_;
 };
+}
+}  // namespace v8::internal
 
-} }  // namespace v8::internal
-
-#endif  // V8_ARM_LITHIUM_CODEGEN_ARM_H_
+#endif  // V8_PPC_LITHIUM_CODEGEN_PPC_H_