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 };
@@ skipping 17 matching lines @@
 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 {
  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,
             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, Condition cond = al) {
-    if (!src.is_reg() || !src.rm().is(dst)) mov(dst, src, LeaveCC, 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,
                 Condition cond = al);
   // Store an object to the root table.
   void StoreRoot(Register source,
                  Heap::RootListIndex index,
                  Condition cond = al);
 
@@ skipping 129 matching lines @@
       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);
-    }
+            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);
-    }
+           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.
@@ skipping 26 matching lines @@
   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,
                   const CallWrapper& call_wrapper);
 
@@ skipping 179 matching lines @@
   // 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,
                           TaggingMode tagging_mode = TAG_RESULT,
                           MutableMode mode = IMMUTABLE);
   void AllocateHeapNumberWithValue(Register result,
-                                   DwVfpRegister value,
+                                   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);
 
+  // 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,
                                   Register filler);
 
   // ---------------------------------------------------------------------------
   // Support functions.
 
@@ skipping 56 matching lines @@
                             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,
+                                   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,
@@ skipping 33 matching lines @@
                    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.
+  // Returns a condition that will be enabled if the object was a string.
   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);
+                               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.
+  // CR_EQ in cr7 is set and result assigned if the conversion is exact.
   void TryDoubleToInt32Exact(Register result,
-                             DwVfpRegister double_input,
-                             LowDwVfpRegister double_scratch);
+                             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,
+                     DoubleRegister double_input,
                      Register input_high,
-                     LowDwVfpRegister double_scratch,
+                     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,
+                                  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,
                          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(),
                 Condition cond = al);
 
   // Call a code stub.
@@ skipping 47 matching lines @@
   void PrepareCallCFunction(int num_reg_arguments,
                             int num_double_registers,
                             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,
                      int num_double_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,
                                 MemOperand return_value_operand,
                                 MemOperand* context_restore_operand);
@@ skipping 33 matching lines @@
                         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,
                                  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,
                                        Label* zero_and_neg,
                                        Label* not_power_of_two);
 
   // ---------------------------------------------------------------------------
+  // Bit testing/extraction
+  //
+  // Bit numbering is such that the least significant bit is bit 0
+  // (for consistency between 32/64-bit).
+
+  // 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
+  }
+
+  inline void ExtractBit(Register dst, Register src, uint32_t bitNumber,
+                         RCBit rc = LeaveRC) {
+    ExtractBitRange(dst, src, bitNumber, bitNumber, rc);
+  }
+
+  // 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);
+  }
+
+
+  // ---------------------------------------------------------------------------
   // Smi utilities
 
-  void SmiTag(Register reg, SBit s = LeaveCC) {
-    add(reg, reg, Operand(reg), s);
+  // Shift left by 1
+  void SmiTag(Register reg, RCBit rc = LeaveRC) {
+    SmiTag(reg, reg, rc);
   }
-  void SmiTag(Register dst, Register src, SBit s = LeaveCC) {
-    add(dst, src, Operand(src), s);
+  void SmiTag(Register dst, Register src, RCBit rc = LeaveRC) {
+    ShiftLeftImm(dst, src, Operand(kSmiShift), rc);
   }
 
-  // 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);
+#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);
   }
-  void TrySmiTag(Register reg, Register src, Label* not_a_smi) {
-    SmiTag(ip, src, SetCC);
-    b(vs, not_a_smi);
-    mov(reg, ip);
+#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 reg, SBit s = LeaveCC) {
-    mov(reg, Operand::SmiUntag(reg), s);
+  void SmiUntag(Register dst, Register src, RCBit rc = LeaveRC) {
+    ShiftRightArithImm(dst, src, kSmiShift, rc);
   }
-  void SmiUntag(Register dst, Register src, SBit s = LeaveCC) {
-    mov(dst, Operand::SmiUntag(src), s);
+
+  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);
 
@@ skipping 58 matching lines @@
   void JumpIfNotUniqueName(Register reg, Label* not_unique_name);
 
   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);
 
+  // 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,
-                          DwVfpRegister input_reg,
-                          LowDwVfpRegister double_scratch);
+                          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>
   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>
   void DecodeField(Register reg) {
     DecodeField<Field>(reg, reg);
   }
 
   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>
   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:
+  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 CallWrapper& call_wrapper);
@@ skipping 19 matching lines @@
 
   // 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;
 };
@@ skipping 15 matching lines @@
               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.
   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())  {
     // 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);
@@ skipping 19 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()) {
     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_);
     }
   }
 
  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()  {
   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->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
-#endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_
+#endif  // V8_PPC_MACRO_ASSEMBLER_PPC_H_