Contribution of PowerPC port.

src/ppc/macro-assembler-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_MACRO_ASSEMBLER_ARM_H_
-#define V8_ARM_MACRO_ASSEMBLER_ARM_H_
+#ifndef V8_PPC_MACRO_ASSEMBLER_PPC_H_
+#define V8_PPC_MACRO_ASSEMBLER_PPC_H_
 
 #include "src/assembler.h"
 #include "src/frames.h"
 #include "src/globals.h"
 
 namespace v8 {
 namespace internal {
 
 // ----------------------------------------------------------------------------
 // Static helper functions
 
 // Generate a MemOperand for loading a field from an object.
 inline MemOperand FieldMemOperand(Register object, int offset) {
   return MemOperand(object, offset - kHeapObjectTag);
 }
 
 
-// Give alias names to registers
-const Register cp = { kRegister_r7_Code };  // JavaScript context pointer.
-const Register pp = { kRegister_r8_Code };  // Constant pool pointer.
-const Register kRootRegister = { kRegister_r10_Code };  // Roots array pointer.
-
 // Flags used for AllocateHeapNumber
 enum TaggingMode {
   // Tag the result.
   TAG_RESULT,
   // Don't tag
   DONT_TAG_RESULT
 };
 
 
 enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET };
 enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK };
 enum PointersToHereCheck {
   kPointersToHereMaybeInteresting,
   kPointersToHereAreAlwaysInteresting
 };
 enum LinkRegisterStatus { kLRHasNotBeenSaved, kLRHasBeenSaved };
 
 
-Register GetRegisterThatIsNotOneOf(Register reg1,
-                                   Register reg2 = no_reg,
+Register GetRegisterThatIsNotOneOf(Register reg1, Register reg2 = no_reg,
                                    Register reg3 = no_reg,
                                    Register reg4 = no_reg,
                                    Register reg5 = no_reg,
                                    Register reg6 = no_reg);
 
 
 #ifdef DEBUG
-bool AreAliased(Register reg1,
-                Register reg2,
-                Register reg3 = no_reg,
-                Register reg4 = no_reg,
-                Register reg5 = no_reg,
-                Register reg6 = no_reg,
-                Register reg7 = no_reg,
+bool AreAliased(Register reg1, Register reg2, Register reg3 = no_reg,
+                Register reg4 = no_reg, Register reg5 = no_reg,
+                Register reg6 = no_reg, Register reg7 = no_reg,
                 Register reg8 = no_reg);
 #endif
 
+// These exist to provide portability between 32 and 64bit
+#if V8_TARGET_ARCH_PPC64
+#define LoadPU ldu
+#define LoadPX ldx
+#define LoadPUX ldux
+#define StorePU stdu
+#define StorePX stdx
+#define StorePUX stdux
+#define ShiftLeftImm sldi
+#define ShiftRightImm srdi
+#define ClearLeftImm clrldi
+#define ClearRightImm clrrdi
+#define ShiftRightArithImm sradi
+#define ShiftLeft sld
+#define ShiftRight srd
+#define ShiftRightArith srad
+#define Mul mulld
+#define Div divd
+#else
+#define LoadPU lwzu
+#define LoadPX lwzx
+#define LoadPUX lwzux
+#define StorePU stwu
+#define StorePX stwx
+#define StorePUX stwux
+#define ShiftLeftImm slwi
+#define ShiftRightImm srwi
+#define ClearLeftImm clrlwi
+#define ClearRightImm clrrwi
+#define ShiftRightArithImm srawi
+#define ShiftLeft slw
+#define ShiftRight srw
+#define ShiftRightArith sraw
+#define Mul mullw
+#define Div divw
+#endif
 
-enum TargetAddressStorageMode {
-  CAN_INLINE_TARGET_ADDRESS,
-  NEVER_INLINE_TARGET_ADDRESS
-};
 
 // MacroAssembler implements a collection of frequently used macros.
-class MacroAssembler: public Assembler {
+class MacroAssembler : public Assembler {
  public:
   // The isolate parameter can be NULL if the macro assembler should
   // not use isolate-dependent functionality. In this case, it's the
   // responsibility of the caller to never invoke such function on the
   // macro assembler.
   MacroAssembler(Isolate* isolate, void* buffer, int size);
 
 
   // Returns the size of a call in instructions. Note, the value returned is
   // only valid as long as no entries are added to the constant pool between
   // checking the call size and emitting the actual call.
   static int CallSize(Register target, Condition cond = al);
   int CallSize(Address target, RelocInfo::Mode rmode, Condition cond = al);
-  int CallStubSize(CodeStub* stub,
-                   TypeFeedbackId ast_id = TypeFeedbackId::None(),
-                   Condition cond = al);
-  static int CallSizeNotPredictableCodeSize(Isolate* isolate,
-                                            Address target,
+  static int CallSizeNotPredictableCodeSize(Address target,
                                             RelocInfo::Mode rmode,
                                             Condition cond = al);
 
   // Jump, Call, and Ret pseudo instructions implementing inter-working.
   void Jump(Register target, Condition cond = al);
-  void Jump(Address target, RelocInfo::Mode rmode, Condition cond = al);
+  void Jump(Address target, RelocInfo::Mode rmode, Condition cond = al,
+            CRegister cr = cr7);
   void Jump(Handle<Code> code, RelocInfo::Mode rmode, Condition cond = al);
   void Call(Register target, Condition cond = al);
-  void Call(Address target, RelocInfo::Mode rmode,
-            Condition cond = al,
-            TargetAddressStorageMode mode = CAN_INLINE_TARGET_ADDRESS);
+  void Call(Address target, RelocInfo::Mode rmode, Condition cond = al);
   int CallSize(Handle<Code> code,
                RelocInfo::Mode rmode = RelocInfo::CODE_TARGET,
                TypeFeedbackId ast_id = TypeFeedbackId::None(),
                Condition cond = al);
-  void Call(Handle<Code> code,
-            RelocInfo::Mode rmode = RelocInfo::CODE_TARGET,
+  void Call(Handle<Code> code, RelocInfo::Mode rmode = RelocInfo::CODE_TARGET,
             TypeFeedbackId ast_id = TypeFeedbackId::None(),
-            Condition cond = al,
-            TargetAddressStorageMode mode = CAN_INLINE_TARGET_ADDRESS);
+            Condition cond = al);
   void Ret(Condition cond = al);
 
   // Emit code to discard a non-negative number of pointer-sized elements
   // from the stack, clobbering only the sp register.
   void Drop(int count, Condition cond = al);
 
   void Ret(int drop, Condition cond = al);
 
-  // Swap two registers.  If the scratch register is omitted then a slightly
-  // less efficient form using xor instead of mov is emitted.
-  void Swap(Register reg1,
-            Register reg2,
-            Register scratch = no_reg,
-            Condition cond = al);
+  void Call(Label* target);
 
-  void Mls(Register dst, Register src1, Register src2, Register srcA,
-           Condition cond = al);
-  void And(Register dst, Register src1, const Operand& src2,
-           Condition cond = al);
-  void Ubfx(Register dst, Register src, int lsb, int width,
-            Condition cond = al);
-  void Sbfx(Register dst, Register src, int lsb, int width,
-            Condition cond = al);
-  // The scratch register is not used for ARMv7.
-  // scratch can be the same register as src (in which case it is trashed), but
-  // not the same as dst.
-  void Bfi(Register dst,
-           Register src,
-           Register scratch,
-           int lsb,
-           int width,
-           Condition cond = al);
-  void Bfc(Register dst, Register src, int lsb, int width, Condition cond = al);
-  void Usat(Register dst, int satpos, const Operand& src,
-            Condition cond = al);
-
-  void Call(Label* target);
-  void Push(Register src) { push(src); }
-  void Pop(Register dst) { pop(dst); }
+  // Emit call to the code we are currently generating.
+  void CallSelf() {
+    Handle<Code> self(reinterpret_cast<Code**>(CodeObject().location()));
+    Call(self, RelocInfo::CODE_TARGET);
+  }
 
   // Register move. May do nothing if the registers are identical.
   void Move(Register dst, Handle<Object> value);
   void Move(Register dst, Register src, Condition cond = al);
-  void Move(Register dst, const Operand& src, SBit sbit = LeaveCC,
-            Condition cond = al) {
-    if (!src.is_reg() || !src.rm().is(dst) || sbit != LeaveCC) {
-      mov(dst, src, sbit, cond);
-    }
-  }
-  void Move(DwVfpRegister dst, DwVfpRegister src);
+  void Move(DoubleRegister dst, DoubleRegister src);
 
-  void Load(Register dst, const MemOperand& src, Representation r);
-  void Store(Register src, const MemOperand& dst, Representation r);
+  void MultiPush(RegList regs);
+  void MultiPop(RegList regs);
 
   // Load an object from the root table.
-  void LoadRoot(Register destination,
-                Heap::RootListIndex index,
+  void LoadRoot(Register destination, Heap::RootListIndex index,
                 Condition cond = al);
   // Store an object to the root table.
-  void StoreRoot(Register source,
-                 Heap::RootListIndex index,
+  void StoreRoot(Register source, Heap::RootListIndex index,
                  Condition cond = al);
 
   // ---------------------------------------------------------------------------
   // GC Support
 
-  void IncrementalMarkingRecordWriteHelper(Register object,
-                                           Register value,
+  void IncrementalMarkingRecordWriteHelper(Register object, Register value,
                                            Register address);
 
-  enum RememberedSetFinalAction {
-    kReturnAtEnd,
-    kFallThroughAtEnd
-  };
+  enum RememberedSetFinalAction { kReturnAtEnd, kFallThroughAtEnd };
 
   // Record in the remembered set the fact that we have a pointer to new space
   // at the address pointed to by the addr register.  Only works if addr is not
   // in new space.
   void RememberedSetHelper(Register object,  // Used for debug code.
-                           Register addr,
-                           Register scratch,
+                           Register addr, Register scratch,
                            SaveFPRegsMode save_fp,
                            RememberedSetFinalAction and_then);
 
-  void CheckPageFlag(Register object,
-                     Register scratch,
-                     int mask,
-                     Condition cc,
+  void CheckPageFlag(Register object, Register scratch, int mask, Condition cc,
                      Label* condition_met);
 
-  void CheckMapDeprecated(Handle<Map> map,
-                          Register scratch,
+  void CheckMapDeprecated(Handle<Map> map, Register scratch,
                           Label* if_deprecated);
 
   // Check if object is in new space.  Jumps if the object is not in new space.
   // The register scratch can be object itself, but scratch will be clobbered.
-  void JumpIfNotInNewSpace(Register object,
-                           Register scratch,
-                           Label* branch) {
+  void JumpIfNotInNewSpace(Register object, Register scratch, Label* branch) {
     InNewSpace(object, scratch, ne, branch);
   }
 
   // Check if object is in new space.  Jumps if the object is in new space.
   // The register scratch can be object itself, but it will be clobbered.
-  void JumpIfInNewSpace(Register object,
-                        Register scratch,
-                        Label* branch) {
+  void JumpIfInNewSpace(Register object, Register scratch, Label* branch) {
     InNewSpace(object, scratch, eq, branch);
   }
 
   // Check if an object has a given incremental marking color.
-  void HasColor(Register object,
-                Register scratch0,
-                Register scratch1,
-                Label* has_color,
-                int first_bit,
-                int second_bit);
+  void HasColor(Register object, Register scratch0, Register scratch1,
+                Label* has_color, int first_bit, int second_bit);
 
-  void JumpIfBlack(Register object,
-                   Register scratch0,
-                   Register scratch1,
+  void JumpIfBlack(Register object, Register scratch0, Register scratch1,
                    Label* on_black);
 
   // Checks the color of an object.  If the object is already grey or black
   // then we just fall through, since it is already live.  If it is white and
   // we can determine that it doesn't need to be scanned, then we just mark it
   // black and fall through.  For the rest we jump to the label so the
   // incremental marker can fix its assumptions.
-  void EnsureNotWhite(Register object,
-                      Register scratch1,
-                      Register scratch2,
-                      Register scratch3,
-                      Label* object_is_white_and_not_data);
+  void EnsureNotWhite(Register object, Register scratch1, Register scratch2,
+                      Register scratch3, Label* object_is_white_and_not_data);
 
   // Detects conservatively whether an object is data-only, i.e. it does need to
   // be scanned by the garbage collector.
-  void JumpIfDataObject(Register value,
-                        Register scratch,
+  void JumpIfDataObject(Register value, Register scratch,
                         Label* not_data_object);
 
   // Notify the garbage collector that we wrote a pointer into an object.
   // |object| is the object being stored into, |value| is the object being
   // stored.  value and scratch registers are clobbered by the operation.
   // The offset is the offset from the start of the object, not the offset from
   // the tagged HeapObject pointer.  For use with FieldOperand(reg, off).
   void RecordWriteField(
-      Register object,
-      int offset,
-      Register value,
-      Register scratch,
-      LinkRegisterStatus lr_status,
-      SaveFPRegsMode save_fp,
+      Register object, int offset, Register value, Register scratch,
+      LinkRegisterStatus lr_status, SaveFPRegsMode save_fp,
       RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
       SmiCheck smi_check = INLINE_SMI_CHECK,
       PointersToHereCheck pointers_to_here_check_for_value =
           kPointersToHereMaybeInteresting);
 
   // As above, but the offset has the tag presubtracted.  For use with
   // MemOperand(reg, off).
   inline void RecordWriteContextSlot(
-      Register context,
-      int offset,
-      Register value,
-      Register scratch,
-      LinkRegisterStatus lr_status,
-      SaveFPRegsMode save_fp,
+      Register context, int offset, Register value, Register scratch,
+      LinkRegisterStatus lr_status, SaveFPRegsMode save_fp,
       RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
       SmiCheck smi_check = INLINE_SMI_CHECK,
       PointersToHereCheck pointers_to_here_check_for_value =
           kPointersToHereMaybeInteresting) {
-    RecordWriteField(context,
-                     offset + kHeapObjectTag,
-                     value,
-                     scratch,
-                     lr_status,
-                     save_fp,
-                     remembered_set_action,
-                     smi_check,
+    RecordWriteField(context, offset + kHeapObjectTag, value, scratch,
+                     lr_status, save_fp, remembered_set_action, smi_check,
                      pointers_to_here_check_for_value);
   }
 
-  void RecordWriteForMap(
-      Register object,
-      Register map,
-      Register dst,
-      LinkRegisterStatus lr_status,
-      SaveFPRegsMode save_fp);
+  void RecordWriteForMap(Register object, Register map, Register dst,
+                         LinkRegisterStatus lr_status, SaveFPRegsMode save_fp);
 
   // For a given |object| notify the garbage collector that the slot |address|
   // has been written.  |value| is the object being stored. The value and
   // address registers are clobbered by the operation.
   void RecordWrite(
-      Register object,
-      Register address,
-      Register value,
-      LinkRegisterStatus lr_status,
-      SaveFPRegsMode save_fp,
+      Register object, Register address, Register value,
+      LinkRegisterStatus lr_status, SaveFPRegsMode save_fp,
       RememberedSetAction remembered_set_action = EMIT_REMEMBERED_SET,
       SmiCheck smi_check = INLINE_SMI_CHECK,
       PointersToHereCheck pointers_to_here_check_for_value =
           kPointersToHereMaybeInteresting);
 
+  void Push(Register src) { push(src); }
+
   // Push a handle.
   void Push(Handle<Object> handle);
   void Push(Smi* smi) { Push(Handle<Smi>(smi, isolate())); }
 
   // Push two registers.  Pushes leftmost register first (to highest address).
-  void Push(Register src1, Register src2, Condition cond = al) {
-    DCHECK(!src1.is(src2));
-    if (src1.code() > src2.code()) {
-      stm(db_w, sp, src1.bit() | src2.bit(), cond);
-    } else {
-      str(src1, MemOperand(sp, 4, NegPreIndex), cond);
-      str(src2, MemOperand(sp, 4, NegPreIndex), cond);
-    }
+  void Push(Register src1, Register src2) {
+    StorePU(src1, MemOperand(sp, -kPointerSize));
+    StorePU(src2, MemOperand(sp, -kPointerSize));
   }
 
   // Push three registers.  Pushes leftmost register first (to highest address).
-  void Push(Register src1, Register src2, Register src3, Condition cond = al) {
-    DCHECK(!src1.is(src2));
-    DCHECK(!src2.is(src3));
-    DCHECK(!src1.is(src3));
-    if (src1.code() > src2.code()) {
-      if (src2.code() > src3.code()) {
-        stm(db_w, sp, src1.bit() | src2.bit() | src3.bit(), cond);
-      } else {
-        stm(db_w, sp, src1.bit() | src2.bit(), cond);
-        str(src3, MemOperand(sp, 4, NegPreIndex), cond);
-      }
-    } else {
-      str(src1, MemOperand(sp, 4, NegPreIndex), cond);
-      Push(src2, src3, cond);
-    }
+  void Push(Register src1, Register src2, Register src3) {
+    StorePU(src1, MemOperand(sp, -kPointerSize));
+    StorePU(src2, MemOperand(sp, -kPointerSize));
+    StorePU(src3, MemOperand(sp, -kPointerSize));
   }
 
   // Push four registers.  Pushes leftmost register first (to highest address).
-  void Push(Register src1,
-            Register src2,
-            Register src3,
-            Register src4,
-            Condition cond = al) {
-    DCHECK(!src1.is(src2));
-    DCHECK(!src2.is(src3));
-    DCHECK(!src1.is(src3));
-    DCHECK(!src1.is(src4));
-    DCHECK(!src2.is(src4));
-    DCHECK(!src3.is(src4));
-    if (src1.code() > src2.code()) {
-      if (src2.code() > src3.code()) {
-        if (src3.code() > src4.code()) {
-          stm(db_w,
-              sp,
-              src1.bit() | src2.bit() | src3.bit() | src4.bit(),
-              cond);
-        } else {
-          stm(db_w, sp, src1.bit() | src2.bit() | src3.bit(), cond);
-          str(src4, MemOperand(sp, 4, NegPreIndex), cond);
-        }
-      } else {
-        stm(db_w, sp, src1.bit() | src2.bit(), cond);
-        Push(src3, src4, cond);
-      }
-    } else {
-      str(src1, MemOperand(sp, 4, NegPreIndex), cond);
-      Push(src2, src3, src4, cond);
-    }
+  void Push(Register src1, Register src2, Register src3, Register src4) {
+    StorePU(src1, MemOperand(sp, -kPointerSize));
+    StorePU(src2, MemOperand(sp, -kPointerSize));
+    StorePU(src3, MemOperand(sp, -kPointerSize));
+    StorePU(src4, MemOperand(sp, -kPointerSize));
   }
 
+  // Push five registers.  Pushes leftmost register first (to highest address).
+  void Push(Register src1, Register src2, Register src3, Register src4,
+            Register src5) {
+    StorePU(src1, MemOperand(sp, -kPointerSize));
+    StorePU(src2, MemOperand(sp, -kPointerSize));
+    StorePU(src3, MemOperand(sp, -kPointerSize));
+    StorePU(src4, MemOperand(sp, -kPointerSize));
+    StorePU(src5, MemOperand(sp, -kPointerSize));
+  }
+
+  void Pop(Register dst) { pop(dst); }
+
   // Pop two registers. Pops rightmost register first (from lower address).
-  void Pop(Register src1, Register src2, Condition cond = al) {
-    DCHECK(!src1.is(src2));
-    if (src1.code() > src2.code()) {
-      ldm(ia_w, sp, src1.bit() | src2.bit(), cond);
-    } else {
-      ldr(src2, MemOperand(sp, 4, PostIndex), cond);
-      ldr(src1, MemOperand(sp, 4, PostIndex), cond);
-    }
+  void Pop(Register src1, Register src2) {
+    LoadP(src2, MemOperand(sp, 0));
+    LoadP(src1, MemOperand(sp, kPointerSize));
+    addi(sp, sp, Operand(2 * kPointerSize));
   }
 
   // Pop three registers.  Pops rightmost register first (from lower address).
-  void Pop(Register src1, Register src2, Register src3, Condition cond = al) {
-    DCHECK(!src1.is(src2));
-    DCHECK(!src2.is(src3));
-    DCHECK(!src1.is(src3));
-    if (src1.code() > src2.code()) {
-      if (src2.code() > src3.code()) {
-        ldm(ia_w, sp, src1.bit() | src2.bit() | src3.bit(), cond);
-      } else {
-        ldr(src3, MemOperand(sp, 4, PostIndex), cond);
-        ldm(ia_w, sp, src1.bit() | src2.bit(), cond);
-      }
-    } else {
-      Pop(src2, src3, cond);
-      ldr(src1, MemOperand(sp, 4, PostIndex), cond);
-    }
+  void Pop(Register src1, Register src2, Register src3) {
+    LoadP(src3, MemOperand(sp, 0));
+    LoadP(src2, MemOperand(sp, kPointerSize));
+    LoadP(src1, MemOperand(sp, 2 * kPointerSize));
+    addi(sp, sp, Operand(3 * kPointerSize));
   }
 
   // Pop four registers.  Pops rightmost register first (from lower address).
-  void Pop(Register src1,
-           Register src2,
-           Register src3,
-           Register src4,
-           Condition cond = al) {
-    DCHECK(!src1.is(src2));
-    DCHECK(!src2.is(src3));
-    DCHECK(!src1.is(src3));
-    DCHECK(!src1.is(src4));
-    DCHECK(!src2.is(src4));
-    DCHECK(!src3.is(src4));
-    if (src1.code() > src2.code()) {
-      if (src2.code() > src3.code()) {
-        if (src3.code() > src4.code()) {
-          ldm(ia_w,
-              sp,
-              src1.bit() | src2.bit() | src3.bit() | src4.bit(),
-              cond);
-        } else {
-          ldr(src4, MemOperand(sp, 4, PostIndex), cond);
-          ldm(ia_w, sp, src1.bit() | src2.bit() | src3.bit(), cond);
-        }
-      } else {
-        Pop(src3, src4, cond);
-        ldm(ia_w, sp, src1.bit() | src2.bit(), cond);
-      }
-    } else {
-      Pop(src2, src3, src4, cond);
-      ldr(src1, MemOperand(sp, 4, PostIndex), cond);
-    }
+  void Pop(Register src1, Register src2, Register src3, Register src4) {
+    LoadP(src4, MemOperand(sp, 0));
+    LoadP(src3, MemOperand(sp, kPointerSize));
+    LoadP(src2, MemOperand(sp, 2 * kPointerSize));
+    LoadP(src1, MemOperand(sp, 3 * kPointerSize));
+    addi(sp, sp, Operand(4 * kPointerSize));
   }
 
-  // Push a fixed frame, consisting of lr, fp, constant pool (if
-  // FLAG_enable_ool_constant_pool), context and JS function / marker id if
-  // marker_reg is a valid register.
+  // Pop five registers.  Pops rightmost register first (from lower address).
+  void Pop(Register src1, Register src2, Register src3, Register src4,
+           Register src5) {
+    LoadP(src5, MemOperand(sp, 0));
+    LoadP(src4, MemOperand(sp, kPointerSize));
+    LoadP(src3, MemOperand(sp, 2 * kPointerSize));
+    LoadP(src2, MemOperand(sp, 3 * kPointerSize));
+    LoadP(src1, MemOperand(sp, 4 * kPointerSize));
+    addi(sp, sp, Operand(5 * kPointerSize));
+  }
+
+  // Push a fixed frame, consisting of lr, fp, context and
+  // JS function / marker id if marker_reg is a valid register.
   void PushFixedFrame(Register marker_reg = no_reg);
   void PopFixedFrame(Register marker_reg = no_reg);
 
   // Push and pop the registers that can hold pointers, as defined by the
   // RegList constant kSafepointSavedRegisters.
   void PushSafepointRegisters();
   void PopSafepointRegisters();
   // Store value in register src in the safepoint stack slot for
   // register dst.
   void StoreToSafepointRegisterSlot(Register src, Register dst);
   // Load the value of the src register from its safepoint stack slot
   // into register dst.
   void LoadFromSafepointRegisterSlot(Register dst, Register src);
 
-  // Load two consecutive registers with two consecutive memory locations.
-  void Ldrd(Register dst1,
-            Register dst2,
-            const MemOperand& src,
-            Condition cond = al);
-
-  // Store two consecutive registers to two consecutive memory locations.
-  void Strd(Register src1,
-            Register src2,
-            const MemOperand& dst,
-            Condition cond = al);
-
-  // Ensure that FPSCR contains values needed by JavaScript.
-  // We need the NaNModeControlBit to be sure that operations like
-  // vadd and vsub generate the Canonical NaN (if a NaN must be generated).
-  // In VFP3 it will be always the Canonical NaN.
-  // In VFP2 it will be either the Canonical NaN or the negative version
-  // of the Canonical NaN. It doesn't matter if we have two values. The aim
-  // is to be sure to never generate the hole NaN.
-  void VFPEnsureFPSCRState(Register scratch);
+  // Flush the I-cache from asm code. You should use CpuFeatures::FlushICache
+  // from C.
+  // Does not handle errors.
+  void FlushICache(Register address, size_t size, Register scratch);
 
   // If the value is a NaN, canonicalize the value else, do nothing.
-  void VFPCanonicalizeNaN(const DwVfpRegister dst,
-                          const DwVfpRegister src,
-                          const Condition cond = al);
-  void VFPCanonicalizeNaN(const DwVfpRegister value,
-                          const Condition cond = al) {
-    VFPCanonicalizeNaN(value, value, cond);
+  void CanonicalizeNaN(const DoubleRegister dst, const DoubleRegister src);
+  void CanonicalizeNaN(const DoubleRegister value) {
+    CanonicalizeNaN(value, value);
   }
 
-  // Compare double values and move the result to the normal condition flags.
-  void VFPCompareAndSetFlags(const DwVfpRegister src1,
-                             const DwVfpRegister src2,
-                             const Condition cond = al);
-  void VFPCompareAndSetFlags(const DwVfpRegister src1,
-                             const double src2,
-                             const Condition cond = al);
+  // Converts the integer (untagged smi) in |src| to a double, storing
+  // the result to |double_dst|
+  void ConvertIntToDouble(Register src, DoubleRegister double_dst);
 
-  // Compare double values and then load the fpscr flags to a register.
-  void VFPCompareAndLoadFlags(const DwVfpRegister src1,
-                              const DwVfpRegister src2,
-                              const Register fpscr_flags,
-                              const Condition cond = al);
-  void VFPCompareAndLoadFlags(const DwVfpRegister src1,
-                              const double src2,
-                              const Register fpscr_flags,
-                              const Condition cond = al);
+  // Converts the unsigned integer (untagged smi) in |src| to
+  // a double, storing the result to |double_dst|
+  void ConvertUnsignedIntToDouble(Register src, DoubleRegister double_dst);
 
-  void Vmov(const DwVfpRegister dst,
-            const double imm,
-            const Register scratch = no_reg);
+  // Converts the integer (untagged smi) in |src| to
+  // a float, storing the result in |dst|
+  // Warning: The value in |int_scrach| will be changed in the process!
+  void ConvertIntToFloat(const DoubleRegister dst, const Register src,
+                         const Register int_scratch);
 
-  void VmovHigh(Register dst, DwVfpRegister src);
-  void VmovHigh(DwVfpRegister dst, Register src);
-  void VmovLow(Register dst, DwVfpRegister src);
-  void VmovLow(DwVfpRegister dst, Register src);
-
-  // Loads the number from object into dst register.
-  // If |object| is neither smi nor heap number, |not_number| is jumped to
-  // with |object| still intact.
-  void LoadNumber(Register object,
-                  LowDwVfpRegister dst,
-                  Register heap_number_map,
-                  Register scratch,
-                  Label* not_number);
-
-  // Loads the number from object into double_dst in the double format.
-  // Control will jump to not_int32 if the value cannot be exactly represented
-  // by a 32-bit integer.
-  // Floating point value in the 32-bit integer range that are not exact integer
-  // won't be loaded.
-  void LoadNumberAsInt32Double(Register object,
-                               DwVfpRegister double_dst,
-                               Register heap_number_map,
-                               Register scratch,
-                               LowDwVfpRegister double_scratch,
-                               Label* not_int32);
-
-  // Loads the number from object into dst as a 32-bit integer.
-  // Control will jump to not_int32 if the object cannot be exactly represented
-  // by a 32-bit integer.
-  // Floating point value in the 32-bit integer range that are not exact integer
-  // won't be converted.
-  void LoadNumberAsInt32(Register object,
-                         Register dst,
-                         Register heap_number_map,
-                         Register scratch,
-                         DwVfpRegister double_scratch0,
-                         LowDwVfpRegister double_scratch1,
-                         Label* not_int32);
+  // Converts the double_input to an integer.  Note that, upon return,
+  // the contents of double_dst will also hold the fixed point representation.
+  void ConvertDoubleToInt64(const DoubleRegister double_input,
+#if !V8_TARGET_ARCH_PPC64
+                            const Register dst_hi,
+#endif
+                            const Register dst, const DoubleRegister double_dst,
+                            FPRoundingMode rounding_mode = kRoundToZero);
 
   // Generates function and stub prologue code.
   void StubPrologue();
   void Prologue(bool code_pre_aging);
 
   // Enter exit frame.
   // stack_space - extra stack space, used for alignment before call to C.
   void EnterExitFrame(bool save_doubles, int stack_space = 0);
 
   // Leave the current exit frame. Expects the return value in r0.
   // Expect the number of values, pushed prior to the exit frame, to
   // remove in a register (or no_reg, if there is nothing to remove).
-  void LeaveExitFrame(bool save_doubles,
-                      Register argument_count,
+  void LeaveExitFrame(bool save_doubles, Register argument_count,
                       bool restore_context);
 
   // Get the actual activation frame alignment for target environment.
   static int ActivationFrameAlignment();
 
   void LoadContext(Register dst, int context_chain_length);
 
   // Conditionally load the cached Array transitioned map of type
   // transitioned_kind from the native context if the map in register
   // map_in_out is the cached Array map in the native context of
   // expected_kind.
-  void LoadTransitionedArrayMapConditional(
-      ElementsKind expected_kind,
-      ElementsKind transitioned_kind,
-      Register map_in_out,
-      Register scratch,
-      Label* no_map_match);
+  void LoadTransitionedArrayMapConditional(ElementsKind expected_kind,
+                                           ElementsKind transitioned_kind,
+                                           Register map_in_out,
+                                           Register scratch,
+                                           Label* no_map_match);
 
   void LoadGlobalFunction(int index, Register function);
 
   // Load the initial map from the global function. The registers
   // function and map can be the same, function is then overwritten.
-  void LoadGlobalFunctionInitialMap(Register function,
-                                    Register map,
+  void LoadGlobalFunctionInitialMap(Register function, Register map,
                                     Register scratch);
 
   void InitializeRootRegister() {
     ExternalReference roots_array_start =
         ExternalReference::roots_array_start(isolate());
     mov(kRootRegister, Operand(roots_array_start));
   }
 
+  // ----------------------------------------------------------------
+  // new PPC macro-assembler interfaces that are slightly higher level
+  // than assembler-ppc and may generate variable length sequences
+
+  // load a literal signed int value <value> to GPR <dst>
+  void LoadIntLiteral(Register dst, int value);
+
+  // load an SMI value <value> to GPR <dst>
+  void LoadSmiLiteral(Register dst, Smi* smi);
+
+  // load a literal double value <value> to FPR <result>
+  void LoadDoubleLiteral(DoubleRegister result, double value, Register scratch);
+
+  void LoadWord(Register dst, const MemOperand& mem, Register scratch,
+                bool updateForm = false);
+
+  void LoadWordArith(Register dst, const MemOperand& mem,
+                     Register scratch = no_reg);
+
+  void StoreWord(Register src, const MemOperand& mem, Register scratch,
+                 bool updateForm = false);
+
+  void LoadHalfWord(Register dst, const MemOperand& mem, Register scratch,
+                    bool updateForm = false);
+
+  void StoreHalfWord(Register src, const MemOperand& mem, Register scratch,
+                     bool updateForm = false);
+
+  void LoadByte(Register dst, const MemOperand& mem, Register scratch,
+                bool updateForm = false);
+
+  void StoreByte(Register src, const MemOperand& mem, Register scratch,
+                 bool updateForm = false);
+
+  void LoadRepresentation(Register dst, const MemOperand& mem, Representation r,
+                          Register scratch = no_reg);
+
+  void StoreRepresentation(Register src, const MemOperand& mem,
+                           Representation r, Register scratch = no_reg);
+
+  // Move values between integer and floating point registers.
+  void MovIntToDouble(DoubleRegister dst, Register src, Register scratch);
+  void MovUnsignedIntToDouble(DoubleRegister dst, Register src,
+                              Register scratch);
+  void MovInt64ToDouble(DoubleRegister dst,
+#if !V8_TARGET_ARCH_PPC64
+                        Register src_hi,
+#endif
+                        Register src);
+#if V8_TARGET_ARCH_PPC64
+  void MovInt64ComponentsToDouble(DoubleRegister dst, Register src_hi,
+                                  Register src_lo, Register scratch);
+#endif
+  void MovDoubleLowToInt(Register dst, DoubleRegister src);
+  void MovDoubleHighToInt(Register dst, DoubleRegister src);
+  void MovDoubleToInt64(
+#if !V8_TARGET_ARCH_PPC64
+      Register dst_hi,
+#endif
+      Register dst, DoubleRegister src);
+
+  void Add(Register dst, Register src, intptr_t value, Register scratch);
+  void Cmpi(Register src1, const Operand& src2, Register scratch,
+            CRegister cr = cr7);
+  void Cmpli(Register src1, const Operand& src2, Register scratch,
+             CRegister cr = cr7);
+  void Cmpwi(Register src1, const Operand& src2, Register scratch,
+             CRegister cr = cr7);
+  void Cmplwi(Register src1, const Operand& src2, Register scratch,
+              CRegister cr = cr7);
+  void And(Register ra, Register rs, const Operand& rb, RCBit rc = LeaveRC);
+  void Or(Register ra, Register rs, const Operand& rb, RCBit rc = LeaveRC);
+  void Xor(Register ra, Register rs, const Operand& rb, RCBit rc = LeaveRC);
+
+  void AddSmiLiteral(Register dst, Register src, Smi* smi, Register scratch);
+  void SubSmiLiteral(Register dst, Register src, Smi* smi, Register scratch);
+  void CmpSmiLiteral(Register src1, Smi* smi, Register scratch,
+                     CRegister cr = cr7);
+  void CmplSmiLiteral(Register src1, Smi* smi, Register scratch,
+                      CRegister cr = cr7);
+  void AndSmiLiteral(Register dst, Register src, Smi* smi, Register scratch,
+                     RCBit rc = LeaveRC);
+
+  // Set new rounding mode RN to FPSCR
+  void SetRoundingMode(FPRoundingMode RN);
+
+  // reset rounding mode to default (kRoundToNearest)
+  void ResetRoundingMode();
+
+  // These exist to provide portability between 32 and 64bit
+  void LoadP(Register dst, const MemOperand& mem, Register scratch = no_reg);
+  void StoreP(Register src, const MemOperand& mem, Register scratch = no_reg);
+
   // ---------------------------------------------------------------------------
   // JavaScript invokes
 
   // Invoke the JavaScript function code by either calling or jumping.
-  void InvokeCode(Register code,
-                  const ParameterCount& expected,
-                  const ParameterCount& actual,
-                  InvokeFlag flag,
+  void InvokeCode(Register code, const ParameterCount& expected,
+                  const ParameterCount& actual, InvokeFlag flag,
                   const CallWrapper& call_wrapper);
 
   // Invoke the JavaScript function in the given register. Changes the
   // current context to the context in the function before invoking.
-  void InvokeFunction(Register function,
-                      const ParameterCount& actual,
-                      InvokeFlag flag,
-                      const CallWrapper& call_wrapper);
+  void InvokeFunction(Register function, const ParameterCount& actual,
+                      InvokeFlag flag, const CallWrapper& call_wrapper);
 
-  void InvokeFunction(Register function,
-                      const ParameterCount& expected,
-                      const ParameterCount& actual,
-                      InvokeFlag flag,
+  void InvokeFunction(Register function, const ParameterCount& expected,
+                      const ParameterCount& actual, InvokeFlag flag,
                       const CallWrapper& call_wrapper);
 
   void InvokeFunction(Handle<JSFunction> function,
                       const ParameterCount& expected,
-                      const ParameterCount& actual,
-                      InvokeFlag flag,
+                      const ParameterCount& actual, InvokeFlag flag,
                       const CallWrapper& call_wrapper);
 
-  void IsObjectJSObjectType(Register heap_object,
-                            Register map,
-                            Register scratch,
-                            Label* fail);
+  void IsObjectJSObjectType(Register heap_object, Register map,
+                            Register scratch, Label* fail);
 
-  void IsInstanceJSObjectType(Register map,
-                              Register scratch,
-                              Label* fail);
+  void IsInstanceJSObjectType(Register map, Register scratch, Label* fail);
 
-  void IsObjectJSStringType(Register object,
-                            Register scratch,
-                            Label* fail);
+  void IsObjectJSStringType(Register object, Register scratch, Label* fail);
 
-  void IsObjectNameType(Register object,
-                        Register scratch,
-                        Label* fail);
+  void IsObjectNameType(Register object, Register scratch, Label* fail);
 
   // ---------------------------------------------------------------------------
   // Debugger Support
 
   void DebugBreak();
 
   // ---------------------------------------------------------------------------
   // Exception handling
 
   // Push a new try handler and link into try handler chain.
   void PushTryHandler(StackHandler::Kind kind, int handler_index);
 
   // Unlink the stack handler on top of the stack from the try handler chain.
   // Must preserve the result register.
   void PopTryHandler();
 
   // Passes thrown value to the handler of top of the try handler chain.
   void Throw(Register value);
 
   // Propagates an uncatchable exception to the top of the current JS stack's
   // handler chain.
   void ThrowUncatchable(Register value);
 
   // ---------------------------------------------------------------------------
   // Inline caching support
 
   // Generate code for checking access rights - used for security checks
   // on access to global objects across environments. The holder register
   // is left untouched, whereas both scratch registers are clobbered.
-  void CheckAccessGlobalProxy(Register holder_reg,
-                              Register scratch,
+  void CheckAccessGlobalProxy(Register holder_reg, Register scratch,
                               Label* miss);
 
   void GetNumberHash(Register t0, Register scratch);
 
-  void LoadFromNumberDictionary(Label* miss,
-                                Register elements,
-                                Register key,
-                                Register result,
-                                Register t0,
-                                Register t1,
+  void LoadFromNumberDictionary(Label* miss, Register elements, Register key,
+                                Register result, Register t0, Register t1,
                                 Register t2);
 
 
-  inline void MarkCode(NopMarkerTypes type) {
-    nop(type);
-  }
+  inline void MarkCode(NopMarkerTypes type) { nop(type); }
 
   // Check if the given instruction is a 'type' marker.
   // i.e. check if is is a mov r<type>, r<type> (referenced as nop(type))
   // These instructions are generated to mark special location in the code,
   // like some special IC code.
   static inline bool IsMarkedCode(Instr instr, int type) {
     DCHECK((FIRST_IC_MARKER <= type) && (type < LAST_CODE_MARKER));
     return IsNop(instr, type);
   }
 
 
   static inline int GetCodeMarker(Instr instr) {
     int dst_reg_offset = 12;
     int dst_mask = 0xf << dst_reg_offset;
     int src_mask = 0xf;
     int dst_reg = (instr & dst_mask) >> dst_reg_offset;
     int src_reg = instr & src_mask;
     uint32_t non_register_mask = ~(dst_mask | src_mask);
     uint32_t mov_mask = al | 13 << 21;
 
     // Return <n> if we have a mov rn rn, else return -1.
     int type = ((instr & non_register_mask) == mov_mask) &&
-               (dst_reg == src_reg) &&
-               (FIRST_IC_MARKER <= dst_reg) && (dst_reg < LAST_CODE_MARKER)
+                       (dst_reg == src_reg) && (FIRST_IC_MARKER <= dst_reg) &&
+                       (dst_reg < LAST_CODE_MARKER)
                    ? src_reg
                    : -1;
     DCHECK((type == -1) ||
            ((FIRST_IC_MARKER <= type) && (type < LAST_CODE_MARKER)));
     return type;
   }
 
 
   // ---------------------------------------------------------------------------
   // Allocation support
 
   // Allocate an object in new space or old pointer space. The object_size is
   // specified either in bytes or in words if the allocation flag SIZE_IN_WORDS
   // is passed. If the space is exhausted control continues at the gc_required
   // label. The allocated object is returned in result. If the flag
   // tag_allocated_object is true the result is tagged as as a heap object.
   // All registers are clobbered also when control continues at the gc_required
   // label.
-  void Allocate(int object_size,
-                Register result,
-                Register scratch1,
-                Register scratch2,
-                Label* gc_required,
-                AllocationFlags flags);
+  void Allocate(int object_size, Register result, Register scratch1,
+                Register scratch2, Label* gc_required, AllocationFlags flags);
 
-  void Allocate(Register object_size,
-                Register result,
-                Register scratch1,
-                Register scratch2,
-                Label* gc_required,
-                AllocationFlags flags);
+  void Allocate(Register object_size, Register result, Register scratch1,
+                Register scratch2, Label* gc_required, AllocationFlags flags);
 
   // Undo allocation in new space. The object passed and objects allocated after
   // it will no longer be allocated. The caller must make sure that no pointers
   // are left to the object(s) no longer allocated as they would be invalid when
   // allocation is undone.
   void UndoAllocationInNewSpace(Register object, Register scratch);
 
 
-  void AllocateTwoByteString(Register result,
-                             Register length,
-                             Register scratch1,
-                             Register scratch2,
-                             Register scratch3,
-                             Label* gc_required);
-  void AllocateAsciiString(Register result,
-                           Register length,
-                           Register scratch1,
-                           Register scratch2,
-                           Register scratch3,
+  void AllocateTwoByteString(Register result, Register length,
+                             Register scratch1, Register scratch2,
+                             Register scratch3, Label* gc_required);
+  void AllocateAsciiString(Register result, Register length, Register scratch1,
+                           Register scratch2, Register scratch3,
                            Label* gc_required);
-  void AllocateTwoByteConsString(Register result,
-                                 Register length,
-                                 Register scratch1,
-                                 Register scratch2,
+  void AllocateTwoByteConsString(Register result, Register length,
+                                 Register scratch1, Register scratch2,
                                  Label* gc_required);
-  void AllocateAsciiConsString(Register result,
-                               Register length,
-                               Register scratch1,
-                               Register scratch2,
+  void AllocateAsciiConsString(Register result, Register length,
+                               Register scratch1, Register scratch2,
                                Label* gc_required);
-  void AllocateTwoByteSlicedString(Register result,
-                                   Register length,
-                                   Register scratch1,
-                                   Register scratch2,
+  void AllocateTwoByteSlicedString(Register result, Register length,
+                                   Register scratch1, Register scratch2,
                                    Label* gc_required);
-  void AllocateAsciiSlicedString(Register result,
-                                 Register length,
-                                 Register scratch1,
-                                 Register scratch2,
+  void AllocateAsciiSlicedString(Register result, Register length,
+                                 Register scratch1, Register scratch2,
                                  Label* gc_required);
 
   // Allocates a heap number or jumps to the gc_required label if the young
   // space is full and a scavenge is needed. All registers are clobbered also
   // when control continues at the gc_required label.
-  void AllocateHeapNumber(Register result,
-                          Register scratch1,
-                          Register scratch2,
-                          Register heap_number_map,
-                          Label* gc_required,
+  void AllocateHeapNumber(Register result, Register scratch1, Register scratch2,
+                          Register heap_number_map, Label* gc_required,
                           TaggingMode tagging_mode = TAG_RESULT,
                           MutableMode mode = IMMUTABLE);
-  void AllocateHeapNumberWithValue(Register result,
-                                   DwVfpRegister value,
-                                   Register scratch1,
-                                   Register scratch2,
+  void AllocateHeapNumberWithValue(Register result, DoubleRegister value,
+                                   Register scratch1, Register scratch2,
                                    Register heap_number_map,
                                    Label* gc_required);
 
   // Copies a fixed number of fields of heap objects from src to dst.
-  void CopyFields(Register dst,
-                  Register src,
-                  LowDwVfpRegister double_scratch,
-                  int field_count);
+  void CopyFields(Register dst, Register src, RegList temps, int field_count);
 
   // Copies a number of bytes from src to dst. All registers are clobbered. On
   // exit src and dst will point to the place just after where the last byte was
   // read or written and length will be zero.
-  void CopyBytes(Register src,
-                 Register dst,
-                 Register length,
-                 Register scratch);
+  void CopyBytes(Register src, Register dst, Register length, Register scratch);
+
+  // Initialize fields with filler values.  |count| fields starting at
+  // |start_offset| are overwritten with the value in |filler|.  At the end the
+  // loop, |start_offset| points at the next uninitialized field.  |count| is
+  // assumed to be non-zero.
+  void InitializeNFieldsWithFiller(Register start_offset, Register count,
+                                   Register filler);
 
   // Initialize fields with filler values.  Fields starting at |start_offset|
   // not including end_offset are overwritten with the value in |filler|.  At
   // the end the loop, |start_offset| takes the value of |end_offset|.
-  void InitializeFieldsWithFiller(Register start_offset,
-                                  Register end_offset,
+  void InitializeFieldsWithFiller(Register start_offset, Register end_offset,
                                   Register filler);
 
   // ---------------------------------------------------------------------------
   // Support functions.
 
   // Try to get function prototype of a function and puts the value in
   // the result register. Checks that the function really is a
   // function and jumps to the miss label if the fast checks fail. The
   // function register will be untouched; the other registers may be
   // clobbered.
-  void TryGetFunctionPrototype(Register function,
-                               Register result,
-                               Register scratch,
-                               Label* miss,
+  void TryGetFunctionPrototype(Register function, Register result,
+                               Register scratch, Label* miss,
                                bool miss_on_bound_function = false);
 
   // Compare object type for heap object.  heap_object contains a non-Smi
   // whose object type should be compared with the given type.  This both
   // sets the flags and leaves the object type in the type_reg register.
   // It leaves the map in the map register (unless the type_reg and map register
   // are the same register).  It leaves the heap object in the heap_object
   // register unless the heap_object register is the same register as one of the
   // other registers.
   // Type_reg can be no_reg. In that case ip is used.
-  void CompareObjectType(Register heap_object,
-                         Register map,
-                         Register type_reg,
+  void CompareObjectType(Register heap_object, Register map, Register type_reg,
                          InstanceType type);
 
   // Compare object type for heap object. Branch to false_label if type
   // is lower than min_type or greater than max_type.
   // Load map into the register map.
-  void CheckObjectTypeRange(Register heap_object,
-                            Register map,
-                            InstanceType min_type,
-                            InstanceType max_type,
+  void CheckObjectTypeRange(Register heap_object, Register map,
+                            InstanceType min_type, InstanceType max_type,
                             Label* false_label);
 
   // Compare instance type in a map.  map contains a valid map object whose
   // object type should be compared with the given type.  This both
   // sets the flags and leaves the object type in the type_reg register.
-  void CompareInstanceType(Register map,
-                           Register type_reg,
-                           InstanceType type);
+  void CompareInstanceType(Register map, Register type_reg, InstanceType type);
 
 
   // Check if a map for a JSObject indicates that the object has fast elements.
   // Jump to the specified label if it does not.
-  void CheckFastElements(Register map,
-                         Register scratch,
-                         Label* fail);
+  void CheckFastElements(Register map, Register scratch, Label* fail);
 
   // Check if a map for a JSObject indicates that the object can have both smi
   // and HeapObject elements.  Jump to the specified label if it does not.
-  void CheckFastObjectElements(Register map,
-                               Register scratch,
-                               Label* fail);
+  void CheckFastObjectElements(Register map, Register scratch, Label* fail);
 
   // Check if a map for a JSObject indicates that the object has fast smi only
   // elements.  Jump to the specified label if it does not.
-  void CheckFastSmiElements(Register map,
-                            Register scratch,
-                            Label* fail);
+  void CheckFastSmiElements(Register map, Register scratch, Label* fail);
 
   // Check to see if maybe_number can be stored as a double in
   // FastDoubleElements. If it can, store it at the index specified by key in
   // the FastDoubleElements array elements. Otherwise jump to fail.
-  void StoreNumberToDoubleElements(Register value_reg,
-                                   Register key_reg,
-                                   Register elements_reg,
-                                   Register scratch1,
-                                   LowDwVfpRegister double_scratch,
-                                   Label* fail,
+  void StoreNumberToDoubleElements(Register value_reg, Register key_reg,
+                                   Register elements_reg, Register scratch1,
+                                   DoubleRegister double_scratch, Label* fail,
                                    int elements_offset = 0);
 
   // Compare an object's map with the specified map and its transitioned
   // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. Condition flags are
   // set with result of map compare. If multiple map compares are required, the
   // compare sequences branches to early_success.
-  void CompareMap(Register obj,
-                  Register scratch,
-                  Handle<Map> map,
+  void CompareMap(Register obj, Register scratch, Handle<Map> map,
                   Label* early_success);
 
   // As above, but the map of the object is already loaded into the register
   // which is preserved by the code generated.
-  void CompareMap(Register obj_map,
-                  Handle<Map> map,
-                  Label* early_success);
+  void CompareMap(Register obj_map, Handle<Map> map, Label* early_success);
 
   // Check if the map of an object is equal to a specified map and branch to
   // label if not. Skip the smi check if not required (object is known to be a
   // heap object). If mode is ALLOW_ELEMENT_TRANSITION_MAPS, then also match
   // against maps that are ElementsKind transition maps of the specified map.
-  void CheckMap(Register obj,
-                Register scratch,
-                Handle<Map> map,
-                Label* fail,
+  void CheckMap(Register obj, Register scratch, Handle<Map> map, Label* fail,
                 SmiCheckType smi_check_type);
 
 
-  void CheckMap(Register obj,
-                Register scratch,
-                Heap::RootListIndex index,
-                Label* fail,
-                SmiCheckType smi_check_type);
+  void CheckMap(Register obj, Register scratch, Heap::RootListIndex index,
+                Label* fail, SmiCheckType smi_check_type);
 
 
   // Check if the map of an object is equal to a specified map and branch to a
   // specified target if equal. Skip the smi check if not required (object is
   // known to be a heap object)
-  void DispatchMap(Register obj,
-                   Register scratch,
-                   Handle<Map> map,
-                   Handle<Code> success,
-                   SmiCheckType smi_check_type);
+  void DispatchMap(Register obj, Register scratch, Handle<Map> map,
+                   Handle<Code> success, SmiCheckType smi_check_type);
 
 
   // Compare the object in a register to a value from the root list.
   // Uses the ip register as scratch.
   void CompareRoot(Register obj, Heap::RootListIndex index);
 
 
   // Load and check the instance type of an object for being a string.
   // Loads the type into the second argument register.
-  // Returns a condition that will be enabled if the object was a string
-  // and the passed-in condition passed. If the passed-in condition failed
-  // then flags remain unchanged.
-  Condition IsObjectStringType(Register obj,
-                               Register type,
-                               Condition cond = al) {
-    ldr(type, FieldMemOperand(obj, HeapObject::kMapOffset), cond);
-    ldrb(type, FieldMemOperand(type, Map::kInstanceTypeOffset), cond);
-    tst(type, Operand(kIsNotStringMask), cond);
+  // Returns a condition that will be enabled if the object was a string.
+  Condition IsObjectStringType(Register obj, Register type) {
+    LoadP(type, FieldMemOperand(obj, HeapObject::kMapOffset));
+    lbz(type, FieldMemOperand(type, Map::kInstanceTypeOffset));
+    andi(r0, type, Operand(kIsNotStringMask));
     DCHECK_EQ(0, kStringTag);
     return eq;
   }
 
 
   // Picks out an array index from the hash field.
   // Register use:
   //   hash - holds the index's hash. Clobbered.
   //   index - holds the overwritten index on exit.
   void IndexFromHash(Register hash, Register index);
 
   // Get the number of least significant bits from a register
   void GetLeastBitsFromSmi(Register dst, Register src, int num_least_bits);
   void GetLeastBitsFromInt32(Register dst, Register src, int mun_least_bits);
 
   // Load the value of a smi object into a double register.
-  // The register value must be between d0 and d15.
-  void SmiToDouble(LowDwVfpRegister value, Register smi);
+  void SmiToDouble(DoubleRegister value, Register smi);
 
   // Check if a double can be exactly represented as a signed 32-bit integer.
-  // Z flag set to one if true.
-  void TestDoubleIsInt32(DwVfpRegister double_input,
-                         LowDwVfpRegister double_scratch);
+  // CR_EQ in cr7 is set if true.
+  void TestDoubleIsInt32(DoubleRegister double_input, Register scratch1,
+                         Register scratch2, DoubleRegister double_scratch);
 
   // Try to convert a double to a signed 32-bit integer.
-  // Z flag set to one and result assigned if the conversion is exact.
-  void TryDoubleToInt32Exact(Register result,
-                             DwVfpRegister double_input,
-                             LowDwVfpRegister double_scratch);
+  // CR_EQ in cr7 is set and result assigned if the conversion is exact.
+  void TryDoubleToInt32Exact(Register result, DoubleRegister double_input,
+                             Register scratch, DoubleRegister double_scratch);
 
   // Floor a double and writes the value to the result register.
   // Go to exact if the conversion is exact (to be able to test -0),
   // fall through calling code if an overflow occurred, else go to done.
   // In return, input_high is loaded with high bits of input.
-  void TryInt32Floor(Register result,
-                     DwVfpRegister double_input,
-                     Register input_high,
-                     LowDwVfpRegister double_scratch,
-                     Label* done,
-                     Label* exact);
+  void TryInt32Floor(Register result, DoubleRegister double_input,
+                     Register input_high, Register scratch,
+                     DoubleRegister double_scratch, Label* done, Label* exact);
 
   // Performs a truncating conversion of a floating point number as used by
   // the JS bitwise operations. See ECMA-262 9.5: ToInt32. Goes to 'done' if it
   // succeeds, otherwise falls through if result is saturated. On return
   // 'result' either holds answer, or is clobbered on fall through.
   //
   // Only public for the test code in test-code-stubs-arm.cc.
-  void TryInlineTruncateDoubleToI(Register result,
-                                  DwVfpRegister input,
+  void TryInlineTruncateDoubleToI(Register result, DoubleRegister input,
                                   Label* done);
 
   // Performs a truncating conversion of a floating point number as used by
   // the JS bitwise operations. See ECMA-262 9.5: ToInt32.
   // Exits with 'result' holding the answer.
-  void TruncateDoubleToI(Register result, DwVfpRegister double_input);
+  void TruncateDoubleToI(Register result, DoubleRegister double_input);
 
   // Performs a truncating conversion of a heap number as used by
   // the JS bitwise operations. See ECMA-262 9.5: ToInt32. 'result' and 'input'
   // must be different registers.  Exits with 'result' holding the answer.
   void TruncateHeapNumberToI(Register result, Register object);
 
   // Converts the smi or heap number in object to an int32 using the rules
   // for ToInt32 as described in ECMAScript 9.5.: the value is truncated
   // and brought into the range -2^31 .. +2^31 - 1. 'result' and 'input' must be
   // different registers.
-  void TruncateNumberToI(Register object,
-                         Register result,
-                         Register heap_number_map,
-                         Register scratch1,
+  void TruncateNumberToI(Register object, Register result,
+                         Register heap_number_map, Register scratch1,
                          Label* not_int32);
 
-  // Check whether d16-d31 are available on the CPU. The result is given by the
-  // Z condition flag: Z==0 if d16-d31 available, Z==1 otherwise.
-  void CheckFor32DRegs(Register scratch);
+  // Overflow handling functions.
+  // Usage: call the appropriate arithmetic function and then call one of the
+  // flow control functions with the corresponding label.
 
-  // Does a runtime check for 16/32 FP registers. Either way, pushes 32 double
-  // values to location, saving [d0..(d15|d31)].
-  void SaveFPRegs(Register location, Register scratch);
+  // Compute dst = left + right, setting condition codes. dst may be same as
+  // either left or right (or a unique register). left and right must not be
+  // the same register.
+  void AddAndCheckForOverflow(Register dst, Register left, Register right,
+                              Register overflow_dst, Register scratch = r0);
 
-  // Does a runtime check for 16/32 FP registers. Either way, pops 32 double
-  // values to location, restoring [d0..(d15|d31)].
-  void RestoreFPRegs(Register location, Register scratch);
+  // Compute dst = left - right, setting condition codes. dst may be same as
+  // either left or right (or a unique register). left and right must not be
+  // the same register.
+  void SubAndCheckForOverflow(Register dst, Register left, Register right,
+                              Register overflow_dst, Register scratch = r0);
+
+  void BranchOnOverflow(Label* label) { blt(label, cr0); }
+
+  void BranchOnNoOverflow(Label* label) { bge(label, cr0); }
+
+  void RetOnOverflow(void) {
+    Label label;
+
+    blt(&label, cr0);
+    Ret();
+    bind(&label);
+  }
+
+  void RetOnNoOverflow(void) {
+    Label label;
+
+    bge(&label, cr0);
+    Ret();
+    bind(&label);
+  }
+
+  // Pushes <count> double values to <location>, starting from d<first>.
+  void SaveFPRegs(Register location, int first, int count);
+
+  // Pops <count> double values from <location>, starting from d<first>.
+  void RestoreFPRegs(Register location, int first, int count);
 
   // ---------------------------------------------------------------------------
   // Runtime calls
 
   // Call a code stub.
-  void CallStub(CodeStub* stub,
-                TypeFeedbackId ast_id = TypeFeedbackId::None(),
+  void CallStub(CodeStub* stub, TypeFeedbackId ast_id = TypeFeedbackId::None(),
                 Condition cond = al);
 
   // Call a code stub.
   void TailCallStub(CodeStub* stub, Condition cond = al);
 
   // Call a runtime routine.
-  void CallRuntime(const Runtime::Function* f,
-                   int num_arguments,
+  void CallRuntime(const Runtime::Function* f, int num_arguments,
                    SaveFPRegsMode save_doubles = kDontSaveFPRegs);
   void CallRuntimeSaveDoubles(Runtime::FunctionId id) {
     const Runtime::Function* function = Runtime::FunctionForId(id);
     CallRuntime(function, function->nargs, kSaveFPRegs);
   }
 
   // Convenience function: Same as above, but takes the fid instead.
-  void CallRuntime(Runtime::FunctionId id,
-                   int num_arguments,
+  void CallRuntime(Runtime::FunctionId id, int num_arguments,
                    SaveFPRegsMode save_doubles = kDontSaveFPRegs) {
     CallRuntime(Runtime::FunctionForId(id), num_arguments, save_doubles);
   }
 
   // Convenience function: call an external reference.
-  void CallExternalReference(const ExternalReference& ext,
-                             int num_arguments);
+  void CallExternalReference(const ExternalReference& ext, int num_arguments);
 
   // Tail call of a runtime routine (jump).
   // Like JumpToExternalReference, but also takes care of passing the number
   // of parameters.
   void TailCallExternalReference(const ExternalReference& ext,
-                                 int num_arguments,
-                                 int result_size);
+                                 int num_arguments, int result_size);
 
   // Convenience function: tail call a runtime routine (jump).
-  void TailCallRuntime(Runtime::FunctionId fid,
-                       int num_arguments,
+  void TailCallRuntime(Runtime::FunctionId fid, int num_arguments,
                        int result_size);
 
   int CalculateStackPassedWords(int num_reg_arguments,
                                 int num_double_arguments);
 
   // Before calling a C-function from generated code, align arguments on stack.
   // After aligning the frame, non-register arguments must be stored in
   // sp[0], sp[4], etc., not pushed. The argument count assumes all arguments
   // are word sized. If double arguments are used, this function assumes that
   // all double arguments are stored before core registers; otherwise the
   // correct alignment of the double values is not guaranteed.
   // Some compilers/platforms require the stack to be aligned when calling
   // C++ code.
   // Needs a scratch register to do some arithmetic. This register will be
   // trashed.
-  void PrepareCallCFunction(int num_reg_arguments,
-                            int num_double_registers,
+  void PrepareCallCFunction(int num_reg_arguments, int num_double_registers,
                             Register scratch);
-  void PrepareCallCFunction(int num_reg_arguments,
-                            Register scratch);
+  void PrepareCallCFunction(int num_reg_arguments, Register scratch);
 
   // There are two ways of passing double arguments on ARM, depending on
   // whether soft or hard floating point ABI is used. These functions
   // abstract parameter passing for the three different ways we call
   // C functions from generated code.
-  void MovToFloatParameter(DwVfpRegister src);
-  void MovToFloatParameters(DwVfpRegister src1, DwVfpRegister src2);
-  void MovToFloatResult(DwVfpRegister src);
+  void MovToFloatParameter(DoubleRegister src);
+  void MovToFloatParameters(DoubleRegister src1, DoubleRegister src2);
+  void MovToFloatResult(DoubleRegister src);
 
   // Calls a C function and cleans up the space for arguments allocated
   // by PrepareCallCFunction. The called function is not allowed to trigger a
   // garbage collection, since that might move the code and invalidate the
   // return address (unless this is somehow accounted for by the called
   // function).
   void CallCFunction(ExternalReference function, int num_arguments);
   void CallCFunction(Register function, int num_arguments);
-  void CallCFunction(ExternalReference function,
-                     int num_reg_arguments,
+  void CallCFunction(ExternalReference function, int num_reg_arguments,
                      int num_double_arguments);
-  void CallCFunction(Register function,
-                     int num_reg_arguments,
+  void CallCFunction(Register function, int num_reg_arguments,
                      int num_double_arguments);
 
-  void MovFromFloatParameter(DwVfpRegister dst);
-  void MovFromFloatResult(DwVfpRegister dst);
+  void MovFromFloatParameter(DoubleRegister dst);
+  void MovFromFloatResult(DoubleRegister dst);
 
   // Calls an API function.  Allocates HandleScope, extracts returned value
   // from handle and propagates exceptions.  Restores context.  stack_space
   // - space to be unwound on exit (includes the call JS arguments space and
   // the additional space allocated for the fast call).
   void CallApiFunctionAndReturn(Register function_address,
-                                ExternalReference thunk_ref,
-                                int stack_space,
+                                ExternalReference thunk_ref, int stack_space,
                                 MemOperand return_value_operand,
                                 MemOperand* context_restore_operand);
 
   // Jump to a runtime routine.
   void JumpToExternalReference(const ExternalReference& builtin);
 
   // Invoke specified builtin JavaScript function. Adds an entry to
   // the unresolved list if the name does not resolve.
-  void InvokeBuiltin(Builtins::JavaScript id,
-                     InvokeFlag flag,
+  void InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag,
                      const CallWrapper& call_wrapper = NullCallWrapper());
 
   // Store the code object for the given builtin in the target register and
   // setup the function in r1.
   void GetBuiltinEntry(Register target, Builtins::JavaScript id);
 
   // Store the function for the given builtin in the target register.
   void GetBuiltinFunction(Register target, Builtins::JavaScript id);
 
   Handle<Object> CodeObject() {
     DCHECK(!code_object_.is_null());
     return code_object_;
   }
 
 
   // Emit code for a truncating division by a constant. The dividend register is
   // unchanged and ip gets clobbered. Dividend and result must be different.
   void TruncatingDiv(Register result, Register dividend, int32_t divisor);
 
   // ---------------------------------------------------------------------------
   // StatsCounter support
 
-  void SetCounter(StatsCounter* counter, int value,
-                  Register scratch1, Register scratch2);
-  void IncrementCounter(StatsCounter* counter, int value,
-                        Register scratch1, Register scratch2);
-  void DecrementCounter(StatsCounter* counter, int value,
-                        Register scratch1, Register scratch2);
+  void SetCounter(StatsCounter* counter, int value, Register scratch1,
+                  Register scratch2);
+  void IncrementCounter(StatsCounter* counter, int value, Register scratch1,
+                        Register scratch2);
+  void DecrementCounter(StatsCounter* counter, int value, Register scratch1,
+                        Register scratch2);
 
 
   // ---------------------------------------------------------------------------
   // Debugging
 
   // Calls Abort(msg) if the condition cond is not satisfied.
   // Use --debug_code to enable.
-  void Assert(Condition cond, BailoutReason reason);
+  void Assert(Condition cond, BailoutReason reason, CRegister cr = cr7);
   void AssertFastElements(Register elements);
 
   // Like Assert(), but always enabled.
-  void Check(Condition cond, BailoutReason reason);
+  void Check(Condition cond, BailoutReason reason, CRegister cr = cr7);
 
   // Print a message to stdout and abort execution.
-  void Abort(BailoutReason msg);
+  void Abort(BailoutReason reason);
 
   // Verify restrictions about code generated in stubs.
   void set_generating_stub(bool value) { generating_stub_ = value; }
   bool generating_stub() { return generating_stub_; }
   void set_has_frame(bool value) { has_frame_ = value; }
   bool has_frame() { return has_frame_; }
   inline bool AllowThisStubCall(CodeStub* stub);
 
-  // EABI variant for double arguments in use.
-  bool use_eabi_hardfloat() {
-#ifdef __arm__
-    return base::OS::ArmUsingHardFloat();
-#elif USE_EABI_HARDFLOAT
-    return true;
-#else
-    return false;
-#endif
-  }
-
   // ---------------------------------------------------------------------------
   // Number utilities
 
   // Check whether the value of reg is a power of two and not zero. If not
   // control continues at the label not_power_of_two. If reg is a power of two
   // the register scratch contains the value of (reg - 1) when control falls
   // through.
-  void JumpIfNotPowerOfTwoOrZero(Register reg,
-                                 Register scratch,
+  void JumpIfNotPowerOfTwoOrZero(Register reg, Register scratch,
                                  Label* not_power_of_two_or_zero);
   // Check whether the value of reg is a power of two and not zero.
   // Control falls through if it is, with scratch containing the mask
   // value (reg - 1).
   // Otherwise control jumps to the 'zero_and_neg' label if the value of reg is
   // zero or negative, or jumps to the 'not_power_of_two' label if the value is
   // strictly positive but not a power of two.
-  void JumpIfNotPowerOfTwoOrZeroAndNeg(Register reg,
-                                       Register scratch,
+  void JumpIfNotPowerOfTwoOrZeroAndNeg(Register reg, Register scratch,
                                        Label* zero_and_neg,
                                        Label* not_power_of_two);
 
   // ---------------------------------------------------------------------------
-  // Smi utilities
+  // Bit testing/extraction
+  //
+  // Bit numbering is such that the least significant bit is bit 0
+  // (for consistency between 32/64-bit).
 
-  void SmiTag(Register reg, SBit s = LeaveCC) {
-    add(reg, reg, Operand(reg), s);
-  }
-  void SmiTag(Register dst, Register src, SBit s = LeaveCC) {
-    add(dst, src, Operand(src), s);
+  // Extract consecutive bits (defined by rangeStart - rangeEnd) from src
+  // and place them into the least significant bits of dst.
+  inline void ExtractBitRange(Register dst, Register src, int rangeStart,
+                              int rangeEnd, RCBit rc = LeaveRC) {
+    DCHECK(rangeStart >= rangeEnd && rangeStart < kBitsPerPointer);
+    int rotate = (rangeEnd == 0) ? 0 : kBitsPerPointer - rangeEnd;
+    int width = rangeStart - rangeEnd + 1;
+#if V8_TARGET_ARCH_PPC64
+    rldicl(dst, src, rotate, kBitsPerPointer - width, rc);
+#else
+    rlwinm(dst, src, rotate, kBitsPerPointer - width, kBitsPerPointer - 1, rc);
+#endif
   }
 
-  // Try to convert int32 to smi. If the value is to large, preserve
-  // the original value and jump to not_a_smi. Destroys scratch and
-  // sets flags.
-  void TrySmiTag(Register reg, Label* not_a_smi) {
-    TrySmiTag(reg, reg, not_a_smi);
+  inline void ExtractBit(Register dst, Register src, uint32_t bitNumber,
+                         RCBit rc = LeaveRC) {
+    ExtractBitRange(dst, src, bitNumber, bitNumber, rc);
   }
-  void TrySmiTag(Register reg, Register src, Label* not_a_smi) {
-    SmiTag(ip, src, SetCC);
-    b(vs, not_a_smi);
-    mov(reg, ip);
+
+  // Extract consecutive bits (defined by mask) from src and place them
+  // into the least significant bits of dst.
+  inline void ExtractBitMask(Register dst, Register src, uintptr_t mask,
+                             RCBit rc = LeaveRC) {
+    int start = kBitsPerPointer - 1;
+    int end;
+    uintptr_t bit = (1L << start);
+
+    while (bit && (mask & bit) == 0) {
+      start--;
+      bit >>= 1;
+    }
+    end = start;
+    bit >>= 1;
+
+    while (bit && (mask & bit)) {
+      end--;
+      bit >>= 1;
+    }
+
+    // 1-bits in mask must be contiguous
+    DCHECK(bit == 0 || (mask & ((bit << 1) - 1)) == 0);
+
+    ExtractBitRange(dst, src, start, end, rc);
+  }
+
+  // Test single bit in value.
+  inline void TestBit(Register value, int bitNumber, Register scratch = r0) {
+    ExtractBitRange(scratch, value, bitNumber, bitNumber, SetRC);
+  }
+
+  // Test consecutive bit range in value.  Range is defined by
+  // rangeStart - rangeEnd.
+  inline void TestBitRange(Register value, int rangeStart, int rangeEnd,
+                           Register scratch = r0) {
+    ExtractBitRange(scratch, value, rangeStart, rangeEnd, SetRC);
+  }
+
+  // Test consecutive bit range in value.  Range is defined by mask.
+  inline void TestBitMask(Register value, uintptr_t mask,
+                          Register scratch = r0) {
+    ExtractBitMask(scratch, value, mask, SetRC);
   }
 
 
-  void SmiUntag(Register reg, SBit s = LeaveCC) {
-    mov(reg, Operand::SmiUntag(reg), s);
+  // ---------------------------------------------------------------------------
+  // Smi utilities
+
+  // Shift left by 1
+  void SmiTag(Register reg, RCBit rc = LeaveRC) { SmiTag(reg, reg, rc); }
+  void SmiTag(Register dst, Register src, RCBit rc = LeaveRC) {
+    ShiftLeftImm(dst, src, Operand(kSmiShift), rc);
   }
-  void SmiUntag(Register dst, Register src, SBit s = LeaveCC) {
-    mov(dst, Operand::SmiUntag(src), s);
+
+#if !V8_TARGET_ARCH_PPC64
+  // Test for overflow < 0: use BranchOnOverflow() or BranchOnNoOverflow().
+  void SmiTagCheckOverflow(Register reg, Register overflow);
+  void SmiTagCheckOverflow(Register dst, Register src, Register overflow);
+
+  inline void JumpIfNotSmiCandidate(Register value, Register scratch,
+                                    Label* not_smi_label) {
+    // High bits must be identical to fit into an Smi
+    addis(scratch, value, Operand(0x40000000u >> 16));
+    cmpi(scratch, Operand::Zero());
+    blt(not_smi_label);
+  }
+#endif
+  inline void TestUnsignedSmiCandidate(Register value, Register scratch) {
+    // The test is different for unsigned int values. Since we need
+    // the value to be in the range of a positive smi, we can't
+    // handle any of the high bits being set in the value.
+    TestBitRange(value, kBitsPerPointer - 1, kBitsPerPointer - 1 - kSmiShift,
+                 scratch);
+  }
+  inline void JumpIfNotUnsignedSmiCandidate(Register value, Register scratch,
+                                            Label* not_smi_label) {
+    TestUnsignedSmiCandidate(value, scratch);
+    bne(not_smi_label, cr0);
+  }
+
+  void SmiUntag(Register reg, RCBit rc = LeaveRC) { SmiUntag(reg, reg, rc); }
+
+  void SmiUntag(Register dst, Register src, RCBit rc = LeaveRC) {
+    ShiftRightArithImm(dst, src, kSmiShift, rc);
+  }
+
+  void SmiToPtrArrayOffset(Register dst, Register src) {
+#if V8_TARGET_ARCH_PPC64
+    STATIC_ASSERT(kSmiTag == 0 && kSmiShift > kPointerSizeLog2);
+    ShiftRightArithImm(dst, src, kSmiShift - kPointerSizeLog2);
+#else
+    STATIC_ASSERT(kSmiTag == 0 && kSmiShift < kPointerSizeLog2);
+    ShiftLeftImm(dst, src, Operand(kPointerSizeLog2 - kSmiShift));
+#endif
+  }
+
+  void SmiToByteArrayOffset(Register dst, Register src) { SmiUntag(dst, src); }
+
+  void SmiToShortArrayOffset(Register dst, Register src) {
+#if V8_TARGET_ARCH_PPC64
+    STATIC_ASSERT(kSmiTag == 0 && kSmiShift > 1);
+    ShiftRightArithImm(dst, src, kSmiShift - 1);
+#else
+    STATIC_ASSERT(kSmiTag == 0 && kSmiShift == 1);
+    if (!dst.is(src)) {
+      mr(dst, src);
+    }
+#endif
+  }
+
+  void SmiToIntArrayOffset(Register dst, Register src) {
+#if V8_TARGET_ARCH_PPC64
+    STATIC_ASSERT(kSmiTag == 0 && kSmiShift > 2);
+    ShiftRightArithImm(dst, src, kSmiShift - 2);
+#else
+    STATIC_ASSERT(kSmiTag == 0 && kSmiShift < 2);
+    ShiftLeftImm(dst, src, Operand(2 - kSmiShift));
+#endif
+  }
+
+#define SmiToFloatArrayOffset SmiToIntArrayOffset
+
+  void SmiToDoubleArrayOffset(Register dst, Register src) {
+#if V8_TARGET_ARCH_PPC64
+    STATIC_ASSERT(kSmiTag == 0 && kSmiShift > kDoubleSizeLog2);
+    ShiftRightArithImm(dst, src, kSmiShift - kDoubleSizeLog2);
+#else
+    STATIC_ASSERT(kSmiTag == 0 && kSmiShift < kDoubleSizeLog2);
+    ShiftLeftImm(dst, src, Operand(kDoubleSizeLog2 - kSmiShift));
+#endif
+  }
+
+  void SmiToArrayOffset(Register dst, Register src, int elementSizeLog2) {
+    if (kSmiShift < elementSizeLog2) {
+      ShiftLeftImm(dst, src, Operand(elementSizeLog2 - kSmiShift));
+    } else if (kSmiShift > elementSizeLog2) {
+      ShiftRightArithImm(dst, src, kSmiShift - elementSizeLog2);
+    } else if (!dst.is(src)) {
+      mr(dst, src);
+    }
+  }
+
+  void IndexToArrayOffset(Register dst, Register src, int elementSizeLog2,
+                          bool isSmi) {
+    if (isSmi) {
+      SmiToArrayOffset(dst, src, elementSizeLog2);
+    } else {
+      ShiftLeftImm(dst, src, Operand(elementSizeLog2));
+    }
   }
 
   // Untag the source value into destination and jump if source is a smi.
   // Souce and destination can be the same register.
   void UntagAndJumpIfSmi(Register dst, Register src, Label* smi_case);
 
   // Untag the source value into destination and jump if source is not a smi.
   // Souce and destination can be the same register.
   void UntagAndJumpIfNotSmi(Register dst, Register src, Label* non_smi_case);
 
-  // Test if the register contains a smi (Z == 0 (eq) if true).
-  inline void SmiTst(Register value) {
-    tst(value, Operand(kSmiTagMask));
+  inline void TestIfSmi(Register value, Register scratch) {
+    TestBit(value, 0, scratch);  // tst(value, Operand(kSmiTagMask));
   }
-  inline void NonNegativeSmiTst(Register value) {
-    tst(value, Operand(kSmiTagMask | kSmiSignMask));
+
+  inline void TestIfPositiveSmi(Register value, Register scratch) {
+    STATIC_ASSERT((kSmiTagMask | kSmiSignMask) ==
+                  (intptr_t)(1UL << (kBitsPerPointer - 1) | 1));
+#if V8_TARGET_ARCH_PPC64
+    rldicl(scratch, value, 1, kBitsPerPointer - 2, SetRC);
+#else
+    rlwinm(scratch, value, 1, kBitsPerPointer - 2, kBitsPerPointer - 1, SetRC);
+#endif
   }
-  // Jump if the register contains a smi.
+
+  // Jump the register contains a smi.
   inline void JumpIfSmi(Register value, Label* smi_label) {
-    tst(value, Operand(kSmiTagMask));
-    b(eq, smi_label);
+    TestIfSmi(value, r0);
+    beq(smi_label, cr0);  // branch if SMI
   }
   // Jump if either of the registers contain a non-smi.
   inline void JumpIfNotSmi(Register value, Label* not_smi_label) {
-    tst(value, Operand(kSmiTagMask));
-    b(ne, not_smi_label);
+    TestIfSmi(value, r0);
+    bne(not_smi_label, cr0);
   }
   // Jump if either of the registers contain a non-smi.
   void JumpIfNotBothSmi(Register reg1, Register reg2, Label* on_not_both_smi);
   // Jump if either of the registers contain a smi.
   void JumpIfEitherSmi(Register reg1, Register reg2, Label* on_either_smi);
 
   // Abort execution if argument is a smi, enabled via --debug-code.
   void AssertNotSmi(Register object);
   void AssertSmi(Register object);
 
+
+#if V8_TARGET_ARCH_PPC64
+  inline void TestIfInt32(Register value, Register scratch1, Register scratch2,
+                          CRegister cr = cr7) {
+    // High bits must be identical to fit into an 32-bit integer
+    srawi(scratch1, value, 31);
+    sradi(scratch2, value, 32);
+    cmp(scratch1, scratch2, cr);
+  }
+#else
+  inline void TestIfInt32(Register hi_word, Register lo_word, Register scratch,
+                          CRegister cr = cr7) {
+    // High bits must be identical to fit into an 32-bit integer
+    srawi(scratch, lo_word, 31);
+    cmp(scratch, hi_word, cr);
+  }
+#endif
+
   // Abort execution if argument is not a string, enabled via --debug-code.
   void AssertString(Register object);
 
   // Abort execution if argument is not a name, enabled via --debug-code.
   void AssertName(Register object);
 
   // Abort execution if argument is not undefined or an AllocationSite, enabled
   // via --debug-code.
   void AssertUndefinedOrAllocationSite(Register object, Register scratch);
 
   // Abort execution if reg is not the root value with the given index,
   // enabled via --debug-code.
   void AssertIsRoot(Register reg, Heap::RootListIndex index);
 
   // ---------------------------------------------------------------------------
   // HeapNumber utilities
 
-  void JumpIfNotHeapNumber(Register object,
-                           Register heap_number_map,
-                           Register scratch,
-                           Label* on_not_heap_number);
+  void JumpIfNotHeapNumber(Register object, Register heap_number_map,
+                           Register scratch, Label* on_not_heap_number);
 
   // ---------------------------------------------------------------------------
   // String utilities
 
   // 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.
-  void LookupNumberStringCache(Register object,
-                               Register result,
-                               Register scratch1,
-                               Register scratch2,
-                               Register scratch3,
-                               Label* not_found);
+  void LookupNumberStringCache(Register object, Register result,
+                               Register scratch1, Register scratch2,
+                               Register scratch3, Label* not_found);
 
   // Checks if both objects are sequential ASCII strings and jumps to label
   // if either is not. Assumes that neither object is a smi.
   void JumpIfNonSmisNotBothSequentialAsciiStrings(Register object1,
                                                   Register object2,
                                                   Register scratch1,
                                                   Register scratch2,
                                                   Label* failure);
 
   // Checks if both objects are sequential ASCII strings and jumps to label
   // if either is not.
-  void JumpIfNotBothSequentialAsciiStrings(Register first,
-                                           Register second,
-                                           Register scratch1,
-                                           Register scratch2,
+  void JumpIfNotBothSequentialAsciiStrings(Register first, Register second,
+                                           Register scratch1, Register scratch2,
                                            Label* not_flat_ascii_strings);
 
   // Checks if both instance types are sequential ASCII strings and jumps to
   // label if either is not.
   void JumpIfBothInstanceTypesAreNotSequentialAscii(
-      Register first_object_instance_type,
-      Register second_object_instance_type,
-      Register scratch1,
-      Register scratch2,
-      Label* failure);
+      Register first_object_instance_type, Register second_object_instance_type,
+      Register scratch1, Register scratch2, Label* failure);
 
   // Check if instance type is sequential ASCII string and jump to label if
   // it is not.
-  void JumpIfInstanceTypeIsNotSequentialAscii(Register type,
-                                              Register scratch,
+  void JumpIfInstanceTypeIsNotSequentialAscii(Register type, Register scratch,
                                               Label* failure);
 
   void JumpIfNotUniqueName(Register reg, Label* not_unique_name);
 
-  void EmitSeqStringSetCharCheck(Register string,
-                                 Register index,
-                                 Register value,
-                                 uint32_t encoding_mask);
+  void EmitSeqStringSetCharCheck(Register string, Register index,
+                                 Register value, uint32_t encoding_mask);
 
   // ---------------------------------------------------------------------------
   // Patching helpers.
 
-  // Get the location of a relocated constant (its address in the constant pool)
-  // from its load site.
-  void GetRelocatedValueLocation(Register ldr_location, Register result,
-                                 Register scratch);
-
+  // Retrieve/patch the relocated value (lis/ori pair or constant pool load).
+  void GetRelocatedValue(Register location, Register result, Register scratch);
+  void SetRelocatedValue(Register location, Register scratch,
+                         Register new_value);
 
   void ClampUint8(Register output_reg, Register input_reg);
 
-  void ClampDoubleToUint8(Register result_reg,
-                          DwVfpRegister input_reg,
-                          LowDwVfpRegister double_scratch);
+  // Saturate a value into 8-bit unsigned integer
+  //   if input_value < 0, output_value is 0
+  //   if input_value > 255, output_value is 255
+  //   otherwise output_value is the (int)input_value (round to nearest)
+  void ClampDoubleToUint8(Register result_reg, DoubleRegister input_reg,
+                          DoubleRegister temp_double_reg);
 
 
   void LoadInstanceDescriptors(Register map, Register descriptors);
   void EnumLength(Register dst, Register map);
   void NumberOfOwnDescriptors(Register dst, Register map);
 
-  template<typename Field>
+  template <typename Field>
   void DecodeField(Register dst, Register src) {
-    Ubfx(dst, src, Field::kShift, Field::kSize);
+    ExtractBitRange(dst, src, Field::kShift + Field::kSize - 1, Field::kShift);
   }
 
-  template<typename Field>
+  template <typename Field>
   void DecodeField(Register reg) {
     DecodeField<Field>(reg, reg);
   }
 
-  template<typename Field>
+  template <typename Field>
   void DecodeFieldToSmi(Register dst, Register src) {
-    static const int shift = Field::kShift;
-    static const int mask = Field::kMask >> shift << kSmiTagSize;
-    STATIC_ASSERT((mask & (0x80000000u >> (kSmiTagSize - 1))) == 0);
-    STATIC_ASSERT(kSmiTag == 0);
-    if (shift < kSmiTagSize) {
-      mov(dst, Operand(src, LSL, kSmiTagSize - shift));
-      and_(dst, dst, Operand(mask));
-    } else if (shift > kSmiTagSize) {
-      mov(dst, Operand(src, LSR, shift - kSmiTagSize));
-      and_(dst, dst, Operand(mask));
-    } else {
-      and_(dst, src, Operand(mask));
+#if V8_TARGET_ARCH_PPC64
+    DecodeField<Field>(dst, src);
+    SmiTag(dst);
+#else
+    // 32-bit can do this in one instruction:
+    int start = Field::kSize + kSmiShift - 1;
+    int end = kSmiShift;
+    int rotate = kSmiShift - Field::kShift;
+    if (rotate < 0) {
+      rotate += kBitsPerPointer;
     }
+    rlwinm(dst, src, rotate, kBitsPerPointer - start - 1,
+           kBitsPerPointer - end - 1);
+#endif
   }
 
-  template<typename Field>
+  template <typename Field>
   void DecodeFieldToSmi(Register reg) {
-    DecodeField<Field>(reg, reg);
+    DecodeFieldToSmi<Field>(reg, reg);
   }
 
   // Activation support.
   void EnterFrame(StackFrame::Type type, bool load_constant_pool = false);
   // Returns the pc offset at which the frame ends.
   int LeaveFrame(StackFrame::Type type);
 
   // Expects object in r0 and returns map with validated enum cache
   // in r0.  Assumes that any other register can be used as a scratch.
   void CheckEnumCache(Register null_value, Label* call_runtime);
 
   // AllocationMemento support. Arrays may have an associated
   // AllocationMemento object that can be checked for in order to pretransition
   // to another type.
   // On entry, receiver_reg should point to the array object.
   // scratch_reg gets clobbered.
   // If allocation info is present, condition flags are set to eq.
   void TestJSArrayForAllocationMemento(Register receiver_reg,
                                        Register scratch_reg,
                                        Label* no_memento_found);
 
   void JumpIfJSArrayHasAllocationMemento(Register receiver_reg,
                                          Register scratch_reg,
                                          Label* memento_found) {
     Label no_memento_found;
     TestJSArrayForAllocationMemento(receiver_reg, scratch_reg,
                                     &no_memento_found);
-    b(eq, memento_found);
+    beq(memento_found);
     bind(&no_memento_found);
   }
 
   // Jumps to found label if a prototype map has dictionary elements.
   void JumpIfDictionaryInPrototypeChain(Register object, Register scratch0,
                                         Register scratch1, Label* found);
 
  private:
-  void CallCFunctionHelper(Register function,
-                           int num_reg_arguments,
+  static const int kSmiShift = kSmiTagSize + kSmiShiftSize;
+
+  void CallCFunctionHelper(Register function, int num_reg_arguments,
                            int num_double_arguments);
 
-  void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = al);
+  void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = al,
+            CRegister cr = cr7);
 
   // Helper functions for generating invokes.
   void InvokePrologue(const ParameterCount& expected,
-                      const ParameterCount& actual,
-                      Handle<Code> code_constant,
-                      Register code_reg,
-                      Label* done,
-                      bool* definitely_mismatches,
-                      InvokeFlag flag,
+                      const ParameterCount& actual, Handle<Code> code_constant,
+                      Register code_reg, Label* done,
+                      bool* definitely_mismatches, InvokeFlag flag,
                       const CallWrapper& call_wrapper);
 
-  void InitializeNewString(Register string,
-                           Register length,
-                           Heap::RootListIndex map_index,
-                           Register scratch1,
+  void InitializeNewString(Register string, Register length,
+                           Heap::RootListIndex map_index, Register scratch1,
                            Register scratch2);
 
   // Helper for implementing JumpIfNotInNewSpace and JumpIfInNewSpace.
-  void InNewSpace(Register object,
-                  Register scratch,
+  void InNewSpace(Register object, Register scratch,
                   Condition cond,  // eq for new space, ne otherwise.
                   Label* branch);
 
   // Helper for finding the mark bits for an address.  Afterwards, the
   // bitmap register points at the word with the mark bits and the mask
   // the position of the first bit.  Leaves addr_reg unchanged.
-  inline void GetMarkBits(Register addr_reg,
-                          Register bitmap_reg,
+  inline void GetMarkBits(Register addr_reg, Register bitmap_reg,
                           Register mask_reg);
 
   // Helper for throwing exceptions.  Compute a handler address and jump to
   // it.  See the implementation for register usage.
   void JumpToHandlerEntry();
 
   // Compute memory operands for safepoint stack slots.
   static int SafepointRegisterStackIndex(int reg_code);
   MemOperand SafepointRegisterSlot(Register reg);
   MemOperand SafepointRegistersAndDoublesSlot(Register reg);
 
-  // Loads the constant pool pointer (pp) register.
+#if V8_OOL_CONSTANT_POOL
+  // Loads the constant pool pointer (kConstantPoolRegister).
   void LoadConstantPoolPointerRegister();
+#endif
 
   bool generating_stub_;
   bool has_frame_;
   // This handle will be patched with the code object on installation.
   Handle<Object> code_object_;
 
   // Needs access to SafepointRegisterStackIndex for compiled frame
   // traversal.
   friend class StandardFrame;
 };
 
 
 // The code patcher is used to patch (typically) small parts of code e.g. for
 // debugging and other types of instrumentation. When using the code patcher
 // the exact number of bytes specified must be emitted. It is not legal to emit
 // relocation information. If any of these constraints are violated it causes
 // an assertion to fail.
 class CodePatcher {
  public:
-  enum FlushICache {
-    FLUSH,
-    DONT_FLUSH
-  };
+  enum FlushICache { FLUSH, DONT_FLUSH };
 
-  CodePatcher(byte* address,
-              int instructions,
-              FlushICache flush_cache = FLUSH);
+  CodePatcher(byte* address, int instructions, FlushICache flush_cache = FLUSH);
   virtual ~CodePatcher();
 
   // Macro assembler to emit code.
   MacroAssembler* masm() { return &masm_; }
 
   // Emit an instruction directly.
   void Emit(Instr instr);
 
-  // Emit an address directly.
-  void Emit(Address addr);
-
   // Emit the condition part of an instruction leaving the rest of the current
   // instruction unchanged.
   void EmitCondition(Condition cond);
 
  private:
-  byte* address_;  // The address of the code being patched.
-  int size_;  // Number of bytes of the expected patch size.
-  MacroAssembler masm_;  // Macro assembler used to generate the code.
+  byte* address_;            // The address of the code being patched.
+  int size_;                 // Number of bytes of the expected patch size.
+  MacroAssembler masm_;      // Macro assembler used to generate the code.
   FlushICache flush_cache_;  // Whether to flush the I cache after patching.
 };
 
 
+#if V8_OOL_CONSTANT_POOL
 class FrameAndConstantPoolScope {
  public:
   FrameAndConstantPoolScope(MacroAssembler* masm, StackFrame::Type type)
       : masm_(masm),
         type_(type),
         old_has_frame_(masm->has_frame()),
-        old_constant_pool_available_(masm->is_constant_pool_available())  {
+        old_constant_pool_available_(masm->is_constant_pool_available()) {
     // We only want to enable constant pool access for non-manual frame scopes
     // to ensure the constant pool pointer is valid throughout the scope.
     DCHECK(type_ != StackFrame::MANUAL && type_ != StackFrame::NONE);
     masm->set_has_frame(true);
     masm->set_constant_pool_available(true);
     masm->EnterFrame(type, !old_constant_pool_available_);
   }
 
   ~FrameAndConstantPoolScope() {
     masm_->LeaveFrame(type_);
@@ skipping 12 matching lines @@
   }
 
  private:
   MacroAssembler* masm_;
   StackFrame::Type type_;
   bool old_has_frame_;
   bool old_constant_pool_available_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(FrameAndConstantPoolScope);
 };
+#else
+#define FrameAndConstantPoolScope FrameScope
+#endif
 
 
+#if V8_OOL_CONSTANT_POOL
 // Class for scoping the the unavailability of constant pool access.
 class ConstantPoolUnavailableScope {
  public:
   explicit ConstantPoolUnavailableScope(MacroAssembler* masm)
-     : masm_(masm),
-       old_constant_pool_available_(masm->is_constant_pool_available()) {
+      : masm_(masm),
+        old_constant_pool_available_(masm->is_constant_pool_available()) {
     if (FLAG_enable_ool_constant_pool) {
       masm_->set_constant_pool_available(false);
     }
   }
   ~ConstantPoolUnavailableScope() {
     if (FLAG_enable_ool_constant_pool) {
-     masm_->set_constant_pool_available(old_constant_pool_available_);
+      masm_->set_constant_pool_available(old_constant_pool_available_);
     }
   }
 
  private:
   MacroAssembler* masm_;
   int old_constant_pool_available_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ConstantPoolUnavailableScope);
 };
+#endif
 
 
 // -----------------------------------------------------------------------------
 // Static helper functions.
 
 inline MemOperand ContextOperand(Register context, int index) {
   return MemOperand(context, Context::SlotOffset(index));
 }
 
 
-inline MemOperand GlobalObjectOperand()  {
+inline MemOperand GlobalObjectOperand() {
   return ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX);
 }
 
 
 #ifdef GENERATED_CODE_COVERAGE
 #define CODE_COVERAGE_STRINGIFY(x) #x
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
-#define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
+#define ACCESS_MASM(masm)    \
+  masm->stop(__FILE_LINE__); \
+  masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
+}
+}  // namespace v8::internal
 
-
-} }  // namespace v8::internal
-
-#endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_
+#endif  // V8_PPC_MACRO_ASSEMBLER_PPC_H_