Reland "ARM64: Add NEON support"

src/arm64/assembler-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
@@ skipping 71 matching lines @@
   index = kRegListSizeInBits - 1 - index;
   DCHECK((1 << index) & list_);
   Remove(index);
   return CPURegister::Create(index, size_, type_);
 }
 
 
 void CPURegList::RemoveCalleeSaved() {
   if (type() == CPURegister::kRegister) {
     Remove(GetCalleeSaved(RegisterSizeInBits()));
-  } else if (type() == CPURegister::kFPRegister) {
-    Remove(GetCalleeSavedFP(RegisterSizeInBits()));
+  } else if (type() == CPURegister::kVRegister) {
+    Remove(GetCalleeSavedV(RegisterSizeInBits()));
   } else {
     DCHECK(type() == CPURegister::kNoRegister);
     DCHECK(IsEmpty());
     // The list must already be empty, so do nothing.
   }
 }
 
 
 CPURegList CPURegList::GetCalleeSaved(int size) {
   return CPURegList(CPURegister::kRegister, size, 19, 29);
 }
 
-
-CPURegList CPURegList::GetCalleeSavedFP(int size) {
-  return CPURegList(CPURegister::kFPRegister, size, 8, 15);
+CPURegList CPURegList::GetCalleeSavedV(int size) {
+  return CPURegList(CPURegister::kVRegister, size, 8, 15);
 }
 
 
 CPURegList CPURegList::GetCallerSaved(int size) {
   // Registers x0-x18 and lr (x30) are caller-saved.
   CPURegList list = CPURegList(CPURegister::kRegister, size, 0, 18);
   list.Combine(lr);
   return list;
 }
 
-
-CPURegList CPURegList::GetCallerSavedFP(int size) {
+CPURegList CPURegList::GetCallerSavedV(int size) {
   // Registers d0-d7 and d16-d31 are caller-saved.
-  CPURegList list = CPURegList(CPURegister::kFPRegister, size, 0, 7);
-  list.Combine(CPURegList(CPURegister::kFPRegister, size, 16, 31));
+  CPURegList list = CPURegList(CPURegister::kVRegister, size, 0, 7);
+  list.Combine(CPURegList(CPURegister::kVRegister, size, 16, 31));
   return list;
 }
 
 
 // This function defines the list of registers which are associated with a
 // safepoint slot. Safepoint register slots are saved contiguously on the stack.
 // MacroAssembler::SafepointRegisterStackIndex handles mapping from register
 // code to index in the safepoint register slots. Any change here can affect
 // this mapping.
 CPURegList CPURegList::GetSafepointSavedRegisters() {
@@ skipping 99 matching lines @@
 
   RegList unique_regs = 0;
   RegList unique_fpregs = 0;
 
   const CPURegister regs[] = {reg1, reg2, reg3, reg4, reg5, reg6, reg7, reg8};
 
   for (unsigned i = 0; i < arraysize(regs); i++) {
     if (regs[i].IsRegister()) {
       number_of_valid_regs++;
       unique_regs |= regs[i].Bit();
-    } else if (regs[i].IsFPRegister()) {
+    } else if (regs[i].IsVRegister()) {
       number_of_valid_fpregs++;
       unique_fpregs |= regs[i].Bit();
     } else {
       DCHECK(!regs[i].IsValid());
     }
   }
 
   int number_of_unique_regs =
     CountSetBits(unique_regs, sizeof(unique_regs) * kBitsPerByte);
   int number_of_unique_fpregs =
@@ skipping 16 matching lines @@
   match &= !reg2.IsValid() || reg2.IsSameSizeAndType(reg1);
   match &= !reg3.IsValid() || reg3.IsSameSizeAndType(reg1);
   match &= !reg4.IsValid() || reg4.IsSameSizeAndType(reg1);
   match &= !reg5.IsValid() || reg5.IsSameSizeAndType(reg1);
   match &= !reg6.IsValid() || reg6.IsSameSizeAndType(reg1);
   match &= !reg7.IsValid() || reg7.IsSameSizeAndType(reg1);
   match &= !reg8.IsValid() || reg8.IsSameSizeAndType(reg1);
   return match;
 }
 
+bool AreSameFormat(const VRegister& reg1, const VRegister& reg2,
+                   const VRegister& reg3, const VRegister& reg4) {
+  DCHECK(reg1.IsValid());
+  return (!reg2.IsValid() || reg2.IsSameFormat(reg1)) &&
+         (!reg3.IsValid() || reg3.IsSameFormat(reg1)) &&
+         (!reg4.IsValid() || reg4.IsSameFormat(reg1));
+}
+
+bool AreConsecutive(const VRegister& reg1, const VRegister& reg2,
+                    const VRegister& reg3, const VRegister& reg4) {
+  DCHECK(reg1.IsValid());
+  if (!reg2.IsValid()) {
+    DCHECK(!reg3.IsValid() && !reg4.IsValid());
+    return true;
+  } else if (reg2.code() != ((reg1.code() + 1) % kNumberOfVRegisters)) {
+    return false;
+  }
+
+  if (!reg3.IsValid()) {
+    DCHECK(!reg4.IsValid());
+    return true;
+  } else if (reg3.code() != ((reg2.code() + 1) % kNumberOfVRegisters)) {
+    return false;
+  }
+
+  if (!reg4.IsValid()) {
+    return true;
+  } else if (reg4.code() != ((reg3.code() + 1) % kNumberOfVRegisters)) {
+    return false;
+  }
+
+  return true;
+}
 
 void Immediate::InitializeHandle(Handle<Object> handle) {
   AllowDeferredHandleDereference using_raw_address;
 
   // Verify all Objects referred by code are NOT in new space.
   Object* obj = *handle;
   if (obj->IsHeapObject()) {
     value_ = reinterpret_cast<intptr_t>(handle.location());
     rmode_ = RelocInfo::EMBEDDED_OBJECT;
   } else {
@@ skipping 1476 matching lines @@
 }
 
 void Assembler::stlxrh(const Register& rs, const Register& rt,
                        const Register& rn) {
   DCHECK(rs.Is32Bits());
   DCHECK(rt.Is32Bits());
   DCHECK(rn.Is64Bits());
   Emit(STLXR_h | Rs(rs) | Rt2(x31) | RnSP(rn) | Rt(rt));
 }
 
+void Assembler::NEON3DifferentL(const VRegister& vd, const VRegister& vn,
+                                const VRegister& vm, NEON3DifferentOp vop) {
+  DCHECK(AreSameFormat(vn, vm));
+  DCHECK((vn.Is1H() && vd.Is1S()) || (vn.Is1S() && vd.Is1D()) ||
+         (vn.Is8B() && vd.Is8H()) || (vn.Is4H() && vd.Is4S()) ||
+         (vn.Is2S() && vd.Is2D()) || (vn.Is16B() && vd.Is8H()) ||
+         (vn.Is8H() && vd.Is4S()) || (vn.Is4S() && vd.Is2D()));
+  Instr format, op = vop;
+  if (vd.IsScalar()) {
+    op |= NEON_Q | NEONScalar;
+    format = SFormat(vn);
+  } else {
+    format = VFormat(vn);
+  }
+  Emit(format | op | Rm(vm) | Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEON3DifferentW(const VRegister& vd, const VRegister& vn,
+                                const VRegister& vm, NEON3DifferentOp vop) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK((vm.Is8B() && vd.Is8H()) || (vm.Is4H() && vd.Is4S()) ||
+         (vm.Is2S() && vd.Is2D()) || (vm.Is16B() && vd.Is8H()) ||
+         (vm.Is8H() && vd.Is4S()) || (vm.Is4S() && vd.Is2D()));
+  Emit(VFormat(vm) | vop | Rm(vm) | Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEON3DifferentHN(const VRegister& vd, const VRegister& vn,
+                                 const VRegister& vm, NEON3DifferentOp vop) {
+  DCHECK(AreSameFormat(vm, vn));
+  DCHECK((vd.Is8B() && vn.Is8H()) || (vd.Is4H() && vn.Is4S()) ||
+         (vd.Is2S() && vn.Is2D()) || (vd.Is16B() && vn.Is8H()) ||
+         (vd.Is8H() && vn.Is4S()) || (vd.Is4S() && vn.Is2D()));
+  Emit(VFormat(vd) | vop | Rm(vm) | Rn(vn) | Rd(vd));
+}
+
+#define NEON_3DIFF_LONG_LIST(V)                                                \
+  V(pmull, NEON_PMULL, vn.IsVector() && vn.Is8B())                             \
+  V(pmull2, NEON_PMULL2, vn.IsVector() && vn.Is16B())                          \
+  V(saddl, NEON_SADDL, vn.IsVector() && vn.IsD())                              \
+  V(saddl2, NEON_SADDL2, vn.IsVector() && vn.IsQ())                            \
+  V(sabal, NEON_SABAL, vn.IsVector() && vn.IsD())                              \
+  V(sabal2, NEON_SABAL2, vn.IsVector() && vn.IsQ())                            \
+  V(uabal, NEON_UABAL, vn.IsVector() && vn.IsD())                              \
+  V(uabal2, NEON_UABAL2, vn.IsVector() && vn.IsQ())                            \
+  V(sabdl, NEON_SABDL, vn.IsVector() && vn.IsD())                              \
+  V(sabdl2, NEON_SABDL2, vn.IsVector() && vn.IsQ())                            \
+  V(uabdl, NEON_UABDL, vn.IsVector() && vn.IsD())                              \
+  V(uabdl2, NEON_UABDL2, vn.IsVector() && vn.IsQ())                            \
+  V(smlal, NEON_SMLAL, vn.IsVector() && vn.IsD())                              \
+  V(smlal2, NEON_SMLAL2, vn.IsVector() && vn.IsQ())                            \
+  V(umlal, NEON_UMLAL, vn.IsVector() && vn.IsD())                              \
+  V(umlal2, NEON_UMLAL2, vn.IsVector() && vn.IsQ())                            \
+  V(smlsl, NEON_SMLSL, vn.IsVector() && vn.IsD())                              \
+  V(smlsl2, NEON_SMLSL2, vn.IsVector() && vn.IsQ())                            \
+  V(umlsl, NEON_UMLSL, vn.IsVector() && vn.IsD())                              \
+  V(umlsl2, NEON_UMLSL2, vn.IsVector() && vn.IsQ())                            \
+  V(smull, NEON_SMULL, vn.IsVector() && vn.IsD())                              \
+  V(smull2, NEON_SMULL2, vn.IsVector() && vn.IsQ())                            \
+  V(umull, NEON_UMULL, vn.IsVector() && vn.IsD())                              \
+  V(umull2, NEON_UMULL2, vn.IsVector() && vn.IsQ())                            \
+  V(ssubl, NEON_SSUBL, vn.IsVector() && vn.IsD())                              \
+  V(ssubl2, NEON_SSUBL2, vn.IsVector() && vn.IsQ())                            \
+  V(uaddl, NEON_UADDL, vn.IsVector() && vn.IsD())                              \
+  V(uaddl2, NEON_UADDL2, vn.IsVector() && vn.IsQ())                            \
+  V(usubl, NEON_USUBL, vn.IsVector() && vn.IsD())                              \
+  V(usubl2, NEON_USUBL2, vn.IsVector() && vn.IsQ())                            \
+  V(sqdmlal, NEON_SQDMLAL, vn.Is1H() || vn.Is1S() || vn.Is4H() || vn.Is2S())   \
+  V(sqdmlal2, NEON_SQDMLAL2, vn.Is1H() || vn.Is1S() || vn.Is8H() || vn.Is4S()) \
+  V(sqdmlsl, NEON_SQDMLSL, vn.Is1H() || vn.Is1S() || vn.Is4H() || vn.Is2S())   \
+  V(sqdmlsl2, NEON_SQDMLSL2, vn.Is1H() || vn.Is1S() || vn.Is8H() || vn.Is4S()) \
+  V(sqdmull, NEON_SQDMULL, vn.Is1H() || vn.Is1S() || vn.Is4H() || vn.Is2S())   \
+  V(sqdmull2, NEON_SQDMULL2, vn.Is1H() || vn.Is1S() || vn.Is8H() || vn.Is4S())
+
+#define DEFINE_ASM_FUNC(FN, OP, AS)                            \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn, \
+                     const VRegister& vm) {                    \
+    DCHECK(AS);                                                \
+    NEON3DifferentL(vd, vn, vm, OP);                           \
+  }
+NEON_3DIFF_LONG_LIST(DEFINE_ASM_FUNC)
+#undef DEFINE_ASM_FUNC
+
+#define NEON_3DIFF_HN_LIST(V)        \
+  V(addhn, NEON_ADDHN, vd.IsD())     \
+  V(addhn2, NEON_ADDHN2, vd.IsQ())   \
+  V(raddhn, NEON_RADDHN, vd.IsD())   \
+  V(raddhn2, NEON_RADDHN2, vd.IsQ()) \
+  V(subhn, NEON_SUBHN, vd.IsD())     \
+  V(subhn2, NEON_SUBHN2, vd.IsQ())   \
+  V(rsubhn, NEON_RSUBHN, vd.IsD())   \
+  V(rsubhn2, NEON_RSUBHN2, vd.IsQ())
+
+#define DEFINE_ASM_FUNC(FN, OP, AS)                            \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn, \
+                     const VRegister& vm) {                    \
+    DCHECK(AS);                                                \
+    NEON3DifferentHN(vd, vn, vm, OP);                          \
+  }
+NEON_3DIFF_HN_LIST(DEFINE_ASM_FUNC)
+#undef DEFINE_ASM_FUNC
+
+void Assembler::NEONPerm(const VRegister& vd, const VRegister& vn,
+                         const VRegister& vm, NEONPermOp op) {
+  DCHECK(AreSameFormat(vd, vn, vm));
+  DCHECK(!vd.Is1D());
+  Emit(VFormat(vd) | op | Rm(vm) | Rn(vn) | Rd(vd));
+}
+
+void Assembler::trn1(const VRegister& vd, const VRegister& vn,
+                     const VRegister& vm) {
+  NEONPerm(vd, vn, vm, NEON_TRN1);
+}
+
+void Assembler::trn2(const VRegister& vd, const VRegister& vn,
+                     const VRegister& vm) {
+  NEONPerm(vd, vn, vm, NEON_TRN2);
+}
+
+void Assembler::uzp1(const VRegister& vd, const VRegister& vn,
+                     const VRegister& vm) {
+  NEONPerm(vd, vn, vm, NEON_UZP1);
+}
+
+void Assembler::uzp2(const VRegister& vd, const VRegister& vn,
+                     const VRegister& vm) {
+  NEONPerm(vd, vn, vm, NEON_UZP2);
+}
+
+void Assembler::zip1(const VRegister& vd, const VRegister& vn,
+                     const VRegister& vm) {
+  NEONPerm(vd, vn, vm, NEON_ZIP1);
+}
+
+void Assembler::zip2(const VRegister& vd, const VRegister& vn,
+                     const VRegister& vm) {
+  NEONPerm(vd, vn, vm, NEON_ZIP2);
+}
+
+void Assembler::NEONShiftImmediate(const VRegister& vd, const VRegister& vn,
+                                   NEONShiftImmediateOp op, int immh_immb) {
+  DCHECK(AreSameFormat(vd, vn));
+  Instr q, scalar;
+  if (vn.IsScalar()) {
+    q = NEON_Q;
+    scalar = NEONScalar;
+  } else {
+    q = vd.IsD() ? 0 : NEON_Q;
+    scalar = 0;
+  }
+  Emit(q | op | scalar | immh_immb | Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEONShiftLeftImmediate(const VRegister& vd, const VRegister& vn,
+                                       int shift, NEONShiftImmediateOp op) {
+  int laneSizeInBits = vn.LaneSizeInBits();
+  DCHECK((shift >= 0) && (shift < laneSizeInBits));
+  NEONShiftImmediate(vd, vn, op, (laneSizeInBits + shift) << 16);
+}
+
+void Assembler::NEONShiftRightImmediate(const VRegister& vd,
+                                        const VRegister& vn, int shift,
+                                        NEONShiftImmediateOp op) {
+  int laneSizeInBits = vn.LaneSizeInBits();
+  DCHECK((shift >= 1) && (shift <= laneSizeInBits));
+  NEONShiftImmediate(vd, vn, op, ((2 * laneSizeInBits) - shift) << 16);
+}
+
+void Assembler::NEONShiftImmediateL(const VRegister& vd, const VRegister& vn,
+                                    int shift, NEONShiftImmediateOp op) {
+  int laneSizeInBits = vn.LaneSizeInBits();
+  DCHECK((shift >= 0) && (shift < laneSizeInBits));
+  int immh_immb = (laneSizeInBits + shift) << 16;
+
+  DCHECK((vn.Is8B() && vd.Is8H()) || (vn.Is4H() && vd.Is4S()) ||
+         (vn.Is2S() && vd.Is2D()) || (vn.Is16B() && vd.Is8H()) ||
+         (vn.Is8H() && vd.Is4S()) || (vn.Is4S() && vd.Is2D()));
+  Instr q;
+  q = vn.IsD() ? 0 : NEON_Q;
+  Emit(q | op | immh_immb | Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEONShiftImmediateN(const VRegister& vd, const VRegister& vn,
+                                    int shift, NEONShiftImmediateOp op) {
+  Instr q, scalar;
+  int laneSizeInBits = vd.LaneSizeInBits();
+  DCHECK((shift >= 1) && (shift <= laneSizeInBits));
+  int immh_immb = (2 * laneSizeInBits - shift) << 16;
+
+  if (vn.IsScalar()) {
+    DCHECK((vd.Is1B() && vn.Is1H()) || (vd.Is1H() && vn.Is1S()) ||
+           (vd.Is1S() && vn.Is1D()));
+    q = NEON_Q;
+    scalar = NEONScalar;
+  } else {
+    DCHECK((vd.Is8B() && vn.Is8H()) || (vd.Is4H() && vn.Is4S()) ||
+           (vd.Is2S() && vn.Is2D()) || (vd.Is16B() && vn.Is8H()) ||
+           (vd.Is8H() && vn.Is4S()) || (vd.Is4S() && vn.Is2D()));
+    scalar = 0;
+    q = vd.IsD() ? 0 : NEON_Q;
+  }
+  Emit(q | op | scalar | immh_immb | Rn(vn) | Rd(vd));
+}
+
+void Assembler::shl(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftLeftImmediate(vd, vn, shift, NEON_SHL);
+}
+
+void Assembler::sli(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftLeftImmediate(vd, vn, shift, NEON_SLI);
+}
+
+void Assembler::sqshl(const VRegister& vd, const VRegister& vn, int shift) {
+  NEONShiftLeftImmediate(vd, vn, shift, NEON_SQSHL_imm);
+}
+
+void Assembler::sqshlu(const VRegister& vd, const VRegister& vn, int shift) {
+  NEONShiftLeftImmediate(vd, vn, shift, NEON_SQSHLU);
+}
+
+void Assembler::uqshl(const VRegister& vd, const VRegister& vn, int shift) {
+  NEONShiftLeftImmediate(vd, vn, shift, NEON_UQSHL_imm);
+}
+
+void Assembler::sshll(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsD());
+  NEONShiftImmediateL(vd, vn, shift, NEON_SSHLL);
+}
+
+void Assembler::sshll2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsQ());
+  NEONShiftImmediateL(vd, vn, shift, NEON_SSHLL);
+}
+
+void Assembler::sxtl(const VRegister& vd, const VRegister& vn) {
+  sshll(vd, vn, 0);
+}
+
+void Assembler::sxtl2(const VRegister& vd, const VRegister& vn) {
+  sshll2(vd, vn, 0);
+}
+
+void Assembler::ushll(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsD());
+  NEONShiftImmediateL(vd, vn, shift, NEON_USHLL);
+}
+
+void Assembler::ushll2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsQ());
+  NEONShiftImmediateL(vd, vn, shift, NEON_USHLL);
+}
+
+void Assembler::uxtl(const VRegister& vd, const VRegister& vn) {
+  ushll(vd, vn, 0);
+}
+
+void Assembler::uxtl2(const VRegister& vd, const VRegister& vn) {
+  ushll2(vd, vn, 0);
+}
+
+void Assembler::sri(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftRightImmediate(vd, vn, shift, NEON_SRI);
+}
+
+void Assembler::sshr(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftRightImmediate(vd, vn, shift, NEON_SSHR);
+}
+
+void Assembler::ushr(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftRightImmediate(vd, vn, shift, NEON_USHR);
+}
+
+void Assembler::srshr(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftRightImmediate(vd, vn, shift, NEON_SRSHR);
+}
+
+void Assembler::urshr(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftRightImmediate(vd, vn, shift, NEON_URSHR);
+}
+
+void Assembler::ssra(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftRightImmediate(vd, vn, shift, NEON_SSRA);
+}
+
+void Assembler::usra(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftRightImmediate(vd, vn, shift, NEON_USRA);
+}
+
+void Assembler::srsra(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftRightImmediate(vd, vn, shift, NEON_SRSRA);
+}
+
+void Assembler::ursra(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEONShiftRightImmediate(vd, vn, shift, NEON_URSRA);
+}
+
+void Assembler::shrn(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsD());
+  NEONShiftImmediateN(vd, vn, shift, NEON_SHRN);
+}
+
+void Assembler::shrn2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsQ());
+  NEONShiftImmediateN(vd, vn, shift, NEON_SHRN);
+}
+
+void Assembler::rshrn(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsD());
+  NEONShiftImmediateN(vd, vn, shift, NEON_RSHRN);
+}
+
+void Assembler::rshrn2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsQ());
+  NEONShiftImmediateN(vd, vn, shift, NEON_RSHRN);
+}
+
+void Assembler::sqshrn(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsD() || (vn.IsScalar() && vd.IsScalar()));
+  NEONShiftImmediateN(vd, vn, shift, NEON_SQSHRN);
+}
+
+void Assembler::sqshrn2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsQ());
+  NEONShiftImmediateN(vd, vn, shift, NEON_SQSHRN);
+}
+
+void Assembler::sqrshrn(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsD() || (vn.IsScalar() && vd.IsScalar()));
+  NEONShiftImmediateN(vd, vn, shift, NEON_SQRSHRN);
+}
+
+void Assembler::sqrshrn2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsQ());
+  NEONShiftImmediateN(vd, vn, shift, NEON_SQRSHRN);
+}
+
+void Assembler::sqshrun(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsD() || (vn.IsScalar() && vd.IsScalar()));
+  NEONShiftImmediateN(vd, vn, shift, NEON_SQSHRUN);
+}
+
+void Assembler::sqshrun2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsQ());
+  NEONShiftImmediateN(vd, vn, shift, NEON_SQSHRUN);
+}
+
+void Assembler::sqrshrun(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsD() || (vn.IsScalar() && vd.IsScalar()));
+  NEONShiftImmediateN(vd, vn, shift, NEON_SQRSHRUN);
+}
+
+void Assembler::sqrshrun2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsQ());
+  NEONShiftImmediateN(vd, vn, shift, NEON_SQRSHRUN);
+}
+
+void Assembler::uqshrn(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsD() || (vn.IsScalar() && vd.IsScalar()));
+  NEONShiftImmediateN(vd, vn, shift, NEON_UQSHRN);
+}
+
+void Assembler::uqshrn2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsQ());
+  NEONShiftImmediateN(vd, vn, shift, NEON_UQSHRN);
+}
+
+void Assembler::uqrshrn(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vd.IsD() || (vn.IsScalar() && vd.IsScalar()));
+  NEONShiftImmediateN(vd, vn, shift, NEON_UQRSHRN);
+}
+
+void Assembler::uqrshrn2(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK(vn.IsVector() && vd.IsQ());
+  NEONShiftImmediateN(vd, vn, shift, NEON_UQRSHRN);
+}
+
+void Assembler::uaddw(const VRegister& vd, const VRegister& vn,
+                      const VRegister& vm) {
+  DCHECK(vm.IsD());
+  NEON3DifferentW(vd, vn, vm, NEON_UADDW);
+}
+
+void Assembler::uaddw2(const VRegister& vd, const VRegister& vn,
+                       const VRegister& vm) {
+  DCHECK(vm.IsQ());
+  NEON3DifferentW(vd, vn, vm, NEON_UADDW2);
+}
+
+void Assembler::saddw(const VRegister& vd, const VRegister& vn,
+                      const VRegister& vm) {
+  DCHECK(vm.IsD());
+  NEON3DifferentW(vd, vn, vm, NEON_SADDW);
+}
+
+void Assembler::saddw2(const VRegister& vd, const VRegister& vn,
+                       const VRegister& vm) {
+  DCHECK(vm.IsQ());
+  NEON3DifferentW(vd, vn, vm, NEON_SADDW2);
+}
+
+void Assembler::usubw(const VRegister& vd, const VRegister& vn,
+                      const VRegister& vm) {
+  DCHECK(vm.IsD());
+  NEON3DifferentW(vd, vn, vm, NEON_USUBW);
+}
+
+void Assembler::usubw2(const VRegister& vd, const VRegister& vn,
+                       const VRegister& vm) {
+  DCHECK(vm.IsQ());
+  NEON3DifferentW(vd, vn, vm, NEON_USUBW2);
+}
+
+void Assembler::ssubw(const VRegister& vd, const VRegister& vn,
+                      const VRegister& vm) {
+  DCHECK(vm.IsD());
+  NEON3DifferentW(vd, vn, vm, NEON_SSUBW);
+}
+
+void Assembler::ssubw2(const VRegister& vd, const VRegister& vn,
+                       const VRegister& vm) {
+  DCHECK(vm.IsQ());
+  NEON3DifferentW(vd, vn, vm, NEON_SSUBW2);
+}
+
 void Assembler::mov(const Register& rd, const Register& rm) {
   // Moves involving the stack pointer are encoded as add immediate with
   // second operand of zero. Otherwise, orr with first operand zr is
   // used.
   if (rd.IsSP() || rm.IsSP()) {
     add(rd, rm, 0);
   } else {
     orr(rd, AppropriateZeroRegFor(rd), rm);
   }
 }
 
+void Assembler::ins(const VRegister& vd, int vd_index, const Register& rn) {
+  // We support vd arguments of the form vd.VxT() or vd.T(), where x is the
+  // number of lanes, and T is b, h, s or d.
+  int lane_size = vd.LaneSizeInBytes();
+  NEONFormatField format;
+  switch (lane_size) {
+    case 1:
+      format = NEON_16B;
+      DCHECK(rn.IsW());
+      break;
+    case 2:
+      format = NEON_8H;
+      DCHECK(rn.IsW());
+      break;
+    case 4:
+      format = NEON_4S;
+      DCHECK(rn.IsW());
+      break;
+    default:
+      DCHECK_EQ(lane_size, 8);
+      DCHECK(rn.IsX());
+      format = NEON_2D;
+      break;
+  }
+
+  DCHECK((0 <= vd_index) &&
+         (vd_index < LaneCountFromFormat(static_cast<VectorFormat>(format))));
+  Emit(NEON_INS_GENERAL | ImmNEON5(format, vd_index) | Rn(rn) | Rd(vd));
+}
+
+void Assembler::mov(const Register& rd, const VRegister& vn, int vn_index) {
+  DCHECK_GE(vn.SizeInBytes(), 4);
+  umov(rd, vn, vn_index);
+}
+
+void Assembler::smov(const Register& rd, const VRegister& vn, int vn_index) {
+  // We support vn arguments of the form vn.VxT() or vn.T(), where x is the
+  // number of lanes, and T is b, h, s.
+  int lane_size = vn.LaneSizeInBytes();
+  NEONFormatField format;
+  Instr q = 0;
+  switch (lane_size) {
+    case 1:
+      format = NEON_16B;
+      break;
+    case 2:
+      format = NEON_8H;
+      break;
+    default:
+      DCHECK_EQ(lane_size, 4);
+      DCHECK(rd.IsX());
+      format = NEON_4S;
+      break;
+  }
+  q = rd.IsW() ? 0 : NEON_Q;
+  DCHECK((0 <= vn_index) &&
+         (vn_index < LaneCountFromFormat(static_cast<VectorFormat>(format))));
+  Emit(q | NEON_SMOV | ImmNEON5(format, vn_index) | Rn(vn) | Rd(rd));
+}
+
+void Assembler::cls(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(!vd.Is1D() && !vd.Is2D());
+  Emit(VFormat(vn) | NEON_CLS | Rn(vn) | Rd(vd));
+}
+
+void Assembler::clz(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(!vd.Is1D() && !vd.Is2D());
+  Emit(VFormat(vn) | NEON_CLZ | Rn(vn) | Rd(vd));
+}
+
+void Assembler::cnt(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(vd.Is8B() || vd.Is16B());
+  Emit(VFormat(vn) | NEON_CNT | Rn(vn) | Rd(vd));
+}
+
+void Assembler::rev16(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(vd.Is8B() || vd.Is16B());
+  Emit(VFormat(vn) | NEON_REV16 | Rn(vn) | Rd(vd));
+}
+
+void Assembler::rev32(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(vd.Is8B() || vd.Is16B() || vd.Is4H() || vd.Is8H());
+  Emit(VFormat(vn) | NEON_REV32 | Rn(vn) | Rd(vd));
+}
+
+void Assembler::rev64(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(!vd.Is1D() && !vd.Is2D());
+  Emit(VFormat(vn) | NEON_REV64 | Rn(vn) | Rd(vd));
+}
+
+void Assembler::ursqrte(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(vd.Is2S() || vd.Is4S());
+  Emit(VFormat(vn) | NEON_URSQRTE | Rn(vn) | Rd(vd));
+}
+
+void Assembler::urecpe(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(vd.Is2S() || vd.Is4S());
+  Emit(VFormat(vn) | NEON_URECPE | Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEONAddlp(const VRegister& vd, const VRegister& vn,
+                          NEON2RegMiscOp op) {
+  DCHECK((op == NEON_SADDLP) || (op == NEON_UADDLP) || (op == NEON_SADALP) ||
+         (op == NEON_UADALP));
+
+  DCHECK((vn.Is8B() && vd.Is4H()) || (vn.Is4H() && vd.Is2S()) ||
+         (vn.Is2S() && vd.Is1D()) || (vn.Is16B() && vd.Is8H()) ||
+         (vn.Is8H() && vd.Is4S()) || (vn.Is4S() && vd.Is2D()));
+  Emit(VFormat(vn) | op | Rn(vn) | Rd(vd));
+}
+
+void Assembler::saddlp(const VRegister& vd, const VRegister& vn) {
+  NEONAddlp(vd, vn, NEON_SADDLP);
+}
+
+void Assembler::uaddlp(const VRegister& vd, const VRegister& vn) {
+  NEONAddlp(vd, vn, NEON_UADDLP);
+}
+
+void Assembler::sadalp(const VRegister& vd, const VRegister& vn) {
+  NEONAddlp(vd, vn, NEON_SADALP);
+}
+
+void Assembler::uadalp(const VRegister& vd, const VRegister& vn) {
+  NEONAddlp(vd, vn, NEON_UADALP);
+}
+
+void Assembler::NEONAcrossLanesL(const VRegister& vd, const VRegister& vn,
+                                 NEONAcrossLanesOp op) {
+  DCHECK((vn.Is8B() && vd.Is1H()) || (vn.Is16B() && vd.Is1H()) ||
+         (vn.Is4H() && vd.Is1S()) || (vn.Is8H() && vd.Is1S()) ||
+         (vn.Is4S() && vd.Is1D()));
+  Emit(VFormat(vn) | op | Rn(vn) | Rd(vd));
+}
+
+void Assembler::saddlv(const VRegister& vd, const VRegister& vn) {
+  NEONAcrossLanesL(vd, vn, NEON_SADDLV);
+}
+
+void Assembler::uaddlv(const VRegister& vd, const VRegister& vn) {
+  NEONAcrossLanesL(vd, vn, NEON_UADDLV);
+}
+
+void Assembler::NEONAcrossLanes(const VRegister& vd, const VRegister& vn,
+                                NEONAcrossLanesOp op) {
+  DCHECK((vn.Is8B() && vd.Is1B()) || (vn.Is16B() && vd.Is1B()) ||
+         (vn.Is4H() && vd.Is1H()) || (vn.Is8H() && vd.Is1H()) ||
+         (vn.Is4S() && vd.Is1S()));
+  if ((op & NEONAcrossLanesFPFMask) == NEONAcrossLanesFPFixed) {
+    Emit(FPFormat(vn) | op | Rn(vn) | Rd(vd));
+  } else {
+    Emit(VFormat(vn) | op | Rn(vn) | Rd(vd));
+  }
+}
+
+#define NEON_ACROSSLANES_LIST(V)      \
+  V(fmaxv, NEON_FMAXV, vd.Is1S())     \
+  V(fminv, NEON_FMINV, vd.Is1S())     \
+  V(fmaxnmv, NEON_FMAXNMV, vd.Is1S()) \
+  V(fminnmv, NEON_FMINNMV, vd.Is1S()) \
+  V(addv, NEON_ADDV, true)            \
+  V(smaxv, NEON_SMAXV, true)          \
+  V(sminv, NEON_SMINV, true)          \
+  V(umaxv, NEON_UMAXV, true)          \
+  V(uminv, NEON_UMINV, true)
+
+#define DEFINE_ASM_FUNC(FN, OP, AS)                              \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn) { \
+    DCHECK(AS);                                                  \
+    NEONAcrossLanes(vd, vn, OP);                                 \
+  }
+NEON_ACROSSLANES_LIST(DEFINE_ASM_FUNC)
+#undef DEFINE_ASM_FUNC
+
+void Assembler::mov(const VRegister& vd, int vd_index, const Register& rn) {
+  ins(vd, vd_index, rn);
+}
+
+void Assembler::umov(const Register& rd, const VRegister& vn, int vn_index) {
+  // We support vn arguments of the form vn.VxT() or vn.T(), where x is the
+  // number of lanes, and T is b, h, s or d.
+  int lane_size = vn.LaneSizeInBytes();
+  NEONFormatField format;
+  Instr q = 0;
+  switch (lane_size) {
+    case 1:
+      format = NEON_16B;
+      DCHECK(rd.IsW());
+      break;
+    case 2:
+      format = NEON_8H;
+      DCHECK(rd.IsW());
+      break;
+    case 4:
+      format = NEON_4S;
+      DCHECK(rd.IsW());
+      break;
+    default:
+      DCHECK_EQ(lane_size, 8);
+      DCHECK(rd.IsX());
+      format = NEON_2D;
+      q = NEON_Q;
+      break;
+  }
+
+  DCHECK((0 <= vn_index) &&
+         (vn_index < LaneCountFromFormat(static_cast<VectorFormat>(format))));
+  Emit(q | NEON_UMOV | ImmNEON5(format, vn_index) | Rn(vn) | Rd(rd));
+}
+
+void Assembler::mov(const VRegister& vd, const VRegister& vn, int vn_index) {
+  DCHECK(vd.IsScalar());
+  dup(vd, vn, vn_index);
+}
+
+void Assembler::dup(const VRegister& vd, const Register& rn) {
+  DCHECK(!vd.Is1D());
+  DCHECK_EQ(vd.Is2D(), rn.IsX());
+  Instr q = vd.IsD() ? 0 : NEON_Q;
+  Emit(q | NEON_DUP_GENERAL | ImmNEON5(VFormat(vd), 0) | Rn(rn) | Rd(vd));
+}
+
+void Assembler::ins(const VRegister& vd, int vd_index, const VRegister& vn,
+                    int vn_index) {
+  DCHECK(AreSameFormat(vd, vn));
+  // We support vd arguments of the form vd.VxT() or vd.T(), where x is the
+  // number of lanes, and T is b, h, s or d.
+  int lane_size = vd.LaneSizeInBytes();
+  NEONFormatField format;
+  switch (lane_size) {
+    case 1:
+      format = NEON_16B;
+      break;
+    case 2:
+      format = NEON_8H;
+      break;
+    case 4:
+      format = NEON_4S;
+      break;
+    default:
+      DCHECK_EQ(lane_size, 8);
+      format = NEON_2D;
+      break;
+  }
+
+  DCHECK((0 <= vd_index) &&
+         (vd_index < LaneCountFromFormat(static_cast<VectorFormat>(format))));
+  DCHECK((0 <= vn_index) &&
+         (vn_index < LaneCountFromFormat(static_cast<VectorFormat>(format))));
+  Emit(NEON_INS_ELEMENT | ImmNEON5(format, vd_index) |
+       ImmNEON4(format, vn_index) | Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEONTable(const VRegister& vd, const VRegister& vn,
+                          const VRegister& vm, NEONTableOp op) {
+  DCHECK(vd.Is16B() || vd.Is8B());
+  DCHECK(vn.Is16B());
+  DCHECK(AreSameFormat(vd, vm));
+  Emit(op | (vd.IsQ() ? NEON_Q : 0) | Rm(vm) | Rn(vn) | Rd(vd));
+}
+
+void Assembler::tbl(const VRegister& vd, const VRegister& vn,
+                    const VRegister& vm) {
+  NEONTable(vd, vn, vm, NEON_TBL_1v);
+}
+
+void Assembler::tbl(const VRegister& vd, const VRegister& vn,
+                    const VRegister& vn2, const VRegister& vm) {
+  USE(vn2);
+  DCHECK(AreSameFormat(vn, vn2));
+  DCHECK(AreConsecutive(vn, vn2));
+  NEONTable(vd, vn, vm, NEON_TBL_2v);
+}
+
+void Assembler::tbl(const VRegister& vd, const VRegister& vn,
+                    const VRegister& vn2, const VRegister& vn3,
+                    const VRegister& vm) {
+  USE(vn2);
+  USE(vn3);
+  DCHECK(AreSameFormat(vn, vn2, vn3));
+  DCHECK(AreConsecutive(vn, vn2, vn3));
+  NEONTable(vd, vn, vm, NEON_TBL_3v);
+}
+
+void Assembler::tbl(const VRegister& vd, const VRegister& vn,
+                    const VRegister& vn2, const VRegister& vn3,
+                    const VRegister& vn4, const VRegister& vm) {
+  USE(vn2);
+  USE(vn3);
+  USE(vn4);
+  DCHECK(AreSameFormat(vn, vn2, vn3, vn4));
+  DCHECK(AreConsecutive(vn, vn2, vn3, vn4));
+  NEONTable(vd, vn, vm, NEON_TBL_4v);
+}
+
+void Assembler::tbx(const VRegister& vd, const VRegister& vn,
+                    const VRegister& vm) {
+  NEONTable(vd, vn, vm, NEON_TBX_1v);
+}
+
+void Assembler::tbx(const VRegister& vd, const VRegister& vn,
+                    const VRegister& vn2, const VRegister& vm) {
+  USE(vn2);
+  DCHECK(AreSameFormat(vn, vn2));
+  DCHECK(AreConsecutive(vn, vn2));
+  NEONTable(vd, vn, vm, NEON_TBX_2v);
+}
+
+void Assembler::tbx(const VRegister& vd, const VRegister& vn,
+                    const VRegister& vn2, const VRegister& vn3,
+                    const VRegister& vm) {
+  USE(vn2);
+  USE(vn3);
+  DCHECK(AreSameFormat(vn, vn2, vn3));
+  DCHECK(AreConsecutive(vn, vn2, vn3));
+  NEONTable(vd, vn, vm, NEON_TBX_3v);
+}
+
+void Assembler::tbx(const VRegister& vd, const VRegister& vn,
+                    const VRegister& vn2, const VRegister& vn3,
+                    const VRegister& vn4, const VRegister& vm) {
+  USE(vn2);
+  USE(vn3);
+  USE(vn4);
+  DCHECK(AreSameFormat(vn, vn2, vn3, vn4));
+  DCHECK(AreConsecutive(vn, vn2, vn3, vn4));
+  NEONTable(vd, vn, vm, NEON_TBX_4v);
+}
+
+void Assembler::mov(const VRegister& vd, int vd_index, const VRegister& vn,
+                    int vn_index) {
+  ins(vd, vd_index, vn, vn_index);
+}
 
 void Assembler::mvn(const Register& rd, const Operand& operand) {
   orn(rd, AppropriateZeroRegFor(rd), operand);
 }
 
-
 void Assembler::mrs(const Register& rt, SystemRegister sysreg) {
   DCHECK(rt.Is64Bits());
   Emit(MRS | ImmSystemRegister(sysreg) | Rt(rt));
 }
 
-
 void Assembler::msr(SystemRegister sysreg, const Register& rt) {
   DCHECK(rt.Is64Bits());
   Emit(MSR | Rt(rt) | ImmSystemRegister(sysreg));
 }
 
-
-void Assembler::hint(SystemHint code) {
-  Emit(HINT | ImmHint(code) | Rt(xzr));
-}
-
+void Assembler::hint(SystemHint code) { Emit(HINT | ImmHint(code) | Rt(xzr)); }
+
+// NEON structure loads and stores.
+Instr Assembler::LoadStoreStructAddrModeField(const MemOperand& addr) {
+  Instr addr_field = RnSP(addr.base());
+
+  if (addr.IsPostIndex()) {
+    static_assert(NEONLoadStoreMultiStructPostIndex ==
+                      static_cast<NEONLoadStoreMultiStructPostIndexOp>(
+                          NEONLoadStoreSingleStructPostIndex),
+                  "Opcodes must match for NEON post index memop.");
+
+    addr_field |= NEONLoadStoreMultiStructPostIndex;
+    if (addr.offset() == 0) {
+      addr_field |= RmNot31(addr.regoffset());
+    } else {
+      // The immediate post index addressing mode is indicated by rm = 31.
+      // The immediate is implied by the number of vector registers used.
+      addr_field |= (0x1f << Rm_offset);
+    }
+  } else {
+    DCHECK(addr.IsImmediateOffset() && (addr.offset() == 0));
+  }
+  return addr_field;
+}
+
+void Assembler::LoadStoreStructVerify(const VRegister& vt,
+                                      const MemOperand& addr, Instr op) {
+#ifdef DEBUG
+  // Assert that addressing mode is either offset (with immediate 0), post
+  // index by immediate of the size of the register list, or post index by a
+  // value in a core register.
+  if (addr.IsImmediateOffset()) {
+    DCHECK_EQ(addr.offset(), 0);
+  } else {
+    int offset = vt.SizeInBytes();
+    switch (op) {
+      case NEON_LD1_1v:
+      case NEON_ST1_1v:
+        offset *= 1;
+        break;
+      case NEONLoadStoreSingleStructLoad1:
+      case NEONLoadStoreSingleStructStore1:
+      case NEON_LD1R:
+        offset = (offset / vt.LaneCount()) * 1;
+        break;
+
+      case NEON_LD1_2v:
+      case NEON_ST1_2v:
+      case NEON_LD2:
+      case NEON_ST2:
+        offset *= 2;
+        break;
+      case NEONLoadStoreSingleStructLoad2:
+      case NEONLoadStoreSingleStructStore2:
+      case NEON_LD2R:
+        offset = (offset / vt.LaneCount()) * 2;
+        break;
+
+      case NEON_LD1_3v:
+      case NEON_ST1_3v:
+      case NEON_LD3:
+      case NEON_ST3:
+        offset *= 3;
+        break;
+      case NEONLoadStoreSingleStructLoad3:
+      case NEONLoadStoreSingleStructStore3:
+      case NEON_LD3R:
+        offset = (offset / vt.LaneCount()) * 3;
+        break;
+
+      case NEON_LD1_4v:
+      case NEON_ST1_4v:
+      case NEON_LD4:
+      case NEON_ST4:
+        offset *= 4;
+        break;
+      case NEONLoadStoreSingleStructLoad4:
+      case NEONLoadStoreSingleStructStore4:
+      case NEON_LD4R:
+        offset = (offset / vt.LaneCount()) * 4;
+        break;
+      default:
+        UNREACHABLE();
+    }
+    DCHECK(!addr.regoffset().Is(NoReg) || addr.offset() == offset);
+  }
+#else
+  USE(vt);
+  USE(addr);
+  USE(op);
+#endif
+}
+
+void Assembler::LoadStoreStruct(const VRegister& vt, const MemOperand& addr,
+                                NEONLoadStoreMultiStructOp op) {
+  LoadStoreStructVerify(vt, addr, op);
+  DCHECK(vt.IsVector() || vt.Is1D());
+  Emit(op | LoadStoreStructAddrModeField(addr) | LSVFormat(vt) | Rt(vt));
+}
+
+void Assembler::LoadStoreStructSingleAllLanes(const VRegister& vt,
+                                              const MemOperand& addr,
+                                              NEONLoadStoreSingleStructOp op) {
+  LoadStoreStructVerify(vt, addr, op);
+  Emit(op | LoadStoreStructAddrModeField(addr) | LSVFormat(vt) | Rt(vt));
+}
+
+void Assembler::ld1(const VRegister& vt, const MemOperand& src) {
+  LoadStoreStruct(vt, src, NEON_LD1_1v);
+}
+
+void Assembler::ld1(const VRegister& vt, const VRegister& vt2,
+                    const MemOperand& src) {
+  USE(vt2);
+  DCHECK(AreSameFormat(vt, vt2));
+  DCHECK(AreConsecutive(vt, vt2));
+  LoadStoreStruct(vt, src, NEON_LD1_2v);
+}
+
+void Assembler::ld1(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  DCHECK(AreSameFormat(vt, vt2, vt3));
+  DCHECK(AreConsecutive(vt, vt2, vt3));
+  LoadStoreStruct(vt, src, NEON_LD1_3v);
+}
+
+void Assembler::ld1(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const VRegister& vt4,
+                    const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  USE(vt4);
+  DCHECK(AreSameFormat(vt, vt2, vt3, vt4));
+  DCHECK(AreConsecutive(vt, vt2, vt3, vt4));
+  LoadStoreStruct(vt, src, NEON_LD1_4v);
+}
+
+void Assembler::ld2(const VRegister& vt, const VRegister& vt2,
+                    const MemOperand& src) {
+  USE(vt2);
+  DCHECK(AreSameFormat(vt, vt2));
+  DCHECK(AreConsecutive(vt, vt2));
+  LoadStoreStruct(vt, src, NEON_LD2);
+}
+
+void Assembler::ld2(const VRegister& vt, const VRegister& vt2, int lane,
+                    const MemOperand& src) {
+  USE(vt2);
+  DCHECK(AreSameFormat(vt, vt2));
+  DCHECK(AreConsecutive(vt, vt2));
+  LoadStoreStructSingle(vt, lane, src, NEONLoadStoreSingleStructLoad2);
+}
+
+void Assembler::ld2r(const VRegister& vt, const VRegister& vt2,
+                     const MemOperand& src) {
+  USE(vt2);
+  DCHECK(AreSameFormat(vt, vt2));
+  DCHECK(AreConsecutive(vt, vt2));
+  LoadStoreStructSingleAllLanes(vt, src, NEON_LD2R);
+}
+
+void Assembler::ld3(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  DCHECK(AreSameFormat(vt, vt2, vt3));
+  DCHECK(AreConsecutive(vt, vt2, vt3));
+  LoadStoreStruct(vt, src, NEON_LD3);
+}
+
+void Assembler::ld3(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, int lane, const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  DCHECK(AreSameFormat(vt, vt2, vt3));
+  DCHECK(AreConsecutive(vt, vt2, vt3));
+  LoadStoreStructSingle(vt, lane, src, NEONLoadStoreSingleStructLoad3);
+}
+
+void Assembler::ld3r(const VRegister& vt, const VRegister& vt2,
+                     const VRegister& vt3, const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  DCHECK(AreSameFormat(vt, vt2, vt3));
+  DCHECK(AreConsecutive(vt, vt2, vt3));
+  LoadStoreStructSingleAllLanes(vt, src, NEON_LD3R);
+}
+
+void Assembler::ld4(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const VRegister& vt4,
+                    const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  USE(vt4);
+  DCHECK(AreSameFormat(vt, vt2, vt3, vt4));
+  DCHECK(AreConsecutive(vt, vt2, vt3, vt4));
+  LoadStoreStruct(vt, src, NEON_LD4);
+}
+
+void Assembler::ld4(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const VRegister& vt4, int lane,
+                    const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  USE(vt4);
+  DCHECK(AreSameFormat(vt, vt2, vt3, vt4));
+  DCHECK(AreConsecutive(vt, vt2, vt3, vt4));
+  LoadStoreStructSingle(vt, lane, src, NEONLoadStoreSingleStructLoad4);
+}
+
+void Assembler::ld4r(const VRegister& vt, const VRegister& vt2,
+                     const VRegister& vt3, const VRegister& vt4,
+                     const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  USE(vt4);
+  DCHECK(AreSameFormat(vt, vt2, vt3, vt4));
+  DCHECK(AreConsecutive(vt, vt2, vt3, vt4));
+  LoadStoreStructSingleAllLanes(vt, src, NEON_LD4R);
+}
+
+void Assembler::st1(const VRegister& vt, const MemOperand& src) {
+  LoadStoreStruct(vt, src, NEON_ST1_1v);
+}
+
+void Assembler::st1(const VRegister& vt, const VRegister& vt2,
+                    const MemOperand& src) {
+  USE(vt2);
+  DCHECK(AreSameFormat(vt, vt2));
+  DCHECK(AreConsecutive(vt, vt2));
+  LoadStoreStruct(vt, src, NEON_ST1_2v);
+}
+
+void Assembler::st1(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  DCHECK(AreSameFormat(vt, vt2, vt3));
+  DCHECK(AreConsecutive(vt, vt2, vt3));
+  LoadStoreStruct(vt, src, NEON_ST1_3v);
+}
+
+void Assembler::st1(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const VRegister& vt4,
+                    const MemOperand& src) {
+  USE(vt2);
+  USE(vt3);
+  USE(vt4);
+  DCHECK(AreSameFormat(vt, vt2, vt3, vt4));
+  DCHECK(AreConsecutive(vt, vt2, vt3, vt4));
+  LoadStoreStruct(vt, src, NEON_ST1_4v);
+}
+
+void Assembler::st2(const VRegister& vt, const VRegister& vt2,
+                    const MemOperand& dst) {
+  USE(vt2);
+  DCHECK(AreSameFormat(vt, vt2));
+  DCHECK(AreConsecutive(vt, vt2));
+  LoadStoreStruct(vt, dst, NEON_ST2);
+}
+
+void Assembler::st2(const VRegister& vt, const VRegister& vt2, int lane,
+                    const MemOperand& dst) {
+  USE(vt2);
+  DCHECK(AreSameFormat(vt, vt2));
+  DCHECK(AreConsecutive(vt, vt2));
+  LoadStoreStructSingle(vt, lane, dst, NEONLoadStoreSingleStructStore2);
+}
+
+void Assembler::st3(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const MemOperand& dst) {
+  USE(vt2);
+  USE(vt3);
+  DCHECK(AreSameFormat(vt, vt2, vt3));
+  DCHECK(AreConsecutive(vt, vt2, vt3));
+  LoadStoreStruct(vt, dst, NEON_ST3);
+}
+
+void Assembler::st3(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, int lane, const MemOperand& dst) {
+  USE(vt2);
+  USE(vt3);
+  DCHECK(AreSameFormat(vt, vt2, vt3));
+  DCHECK(AreConsecutive(vt, vt2, vt3));
+  LoadStoreStructSingle(vt, lane, dst, NEONLoadStoreSingleStructStore3);
+}
+
+void Assembler::st4(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const VRegister& vt4,
+                    const MemOperand& dst) {
+  USE(vt2);
+  USE(vt3);
+  USE(vt4);
+  DCHECK(AreSameFormat(vt, vt2, vt3, vt4));
+  DCHECK(AreConsecutive(vt, vt2, vt3, vt4));
+  LoadStoreStruct(vt, dst, NEON_ST4);
+}
+
+void Assembler::st4(const VRegister& vt, const VRegister& vt2,
+                    const VRegister& vt3, const VRegister& vt4, int lane,
+                    const MemOperand& dst) {
+  USE(vt2);
+  USE(vt3);
+  USE(vt4);
+  DCHECK(AreSameFormat(vt, vt2, vt3, vt4));
+  DCHECK(AreConsecutive(vt, vt2, vt3, vt4));
+  LoadStoreStructSingle(vt, lane, dst, NEONLoadStoreSingleStructStore4);
+}
+
+void Assembler::LoadStoreStructSingle(const VRegister& vt, uint32_t lane,
+                                      const MemOperand& addr,
+                                      NEONLoadStoreSingleStructOp op) {
+  LoadStoreStructVerify(vt, addr, op);
+
+  // We support vt arguments of the form vt.VxT() or vt.T(), where x is the
+  // number of lanes, and T is b, h, s or d.
+  unsigned lane_size = vt.LaneSizeInBytes();
+  DCHECK_LT(lane, kQRegSize / lane_size);
+
+  // Lane size is encoded in the opcode field. Lane index is encoded in the Q,
+  // S and size fields.
+  lane *= lane_size;
+
+  // Encodings for S[0]/D[0] and S[2]/D[1] are distinguished using the least-
+  // significant bit of the size field, so we increment lane here to account for
+  // that.
+  if (lane_size == 8) lane++;
+
+  Instr size = (lane << NEONLSSize_offset) & NEONLSSize_mask;
+  Instr s = (lane << (NEONS_offset - 2)) & NEONS_mask;
+  Instr q = (lane << (NEONQ_offset - 3)) & NEONQ_mask;
+
+  Instr instr = op;
+  switch (lane_size) {
+    case 1:
+      instr |= NEONLoadStoreSingle_b;
+      break;
+    case 2:
+      instr |= NEONLoadStoreSingle_h;
+      break;
+    case 4:
+      instr |= NEONLoadStoreSingle_s;
+      break;
+    default:
+      DCHECK_EQ(lane_size, 8U);
+      instr |= NEONLoadStoreSingle_d;
+  }
+
+  Emit(instr | LoadStoreStructAddrModeField(addr) | q | size | s | Rt(vt));
+}
+
+void Assembler::ld1(const VRegister& vt, int lane, const MemOperand& src) {
+  LoadStoreStructSingle(vt, lane, src, NEONLoadStoreSingleStructLoad1);
+}
+
+void Assembler::ld1r(const VRegister& vt, const MemOperand& src) {
+  LoadStoreStructSingleAllLanes(vt, src, NEON_LD1R);
+}
+
+void Assembler::st1(const VRegister& vt, int lane, const MemOperand& dst) {
+  LoadStoreStructSingle(vt, lane, dst, NEONLoadStoreSingleStructStore1);
+}
 
 void Assembler::dmb(BarrierDomain domain, BarrierType type) {
   Emit(DMB | ImmBarrierDomain(domain) | ImmBarrierType(type));
 }
 
-
 void Assembler::dsb(BarrierDomain domain, BarrierType type) {
   Emit(DSB | ImmBarrierDomain(domain) | ImmBarrierType(type));
 }
 
-
 void Assembler::isb() {
   Emit(ISB | ImmBarrierDomain(FullSystem) | ImmBarrierType(BarrierAll));
 }
 
-
-void Assembler::fmov(FPRegister fd, double imm) {
-  DCHECK(fd.Is64Bits());
-  DCHECK(IsImmFP64(imm));
-  Emit(FMOV_d_imm | Rd(fd) | ImmFP64(imm));
-}
-
-
-void Assembler::fmov(FPRegister fd, float imm) {
-  DCHECK(fd.Is32Bits());
-  DCHECK(IsImmFP32(imm));
-  Emit(FMOV_s_imm | Rd(fd) | ImmFP32(imm));
-}
-
-
-void Assembler::fmov(Register rd, FPRegister fn) {
-  DCHECK(rd.SizeInBits() == fn.SizeInBits());
+void Assembler::fmov(const VRegister& vd, double imm) {
+  if (vd.IsScalar()) {
+    DCHECK(vd.Is1D());
+    Emit(FMOV_d_imm | Rd(vd) | ImmFP(imm));
+  } else {
+    DCHECK(vd.Is2D());
+    Instr op = NEONModifiedImmediate_MOVI | NEONModifiedImmediateOpBit;
+    Emit(NEON_Q | op | ImmNEONFP(imm) | NEONCmode(0xf) | Rd(vd));
+  }
+}
+
+void Assembler::fmov(const VRegister& vd, float imm) {
+  if (vd.IsScalar()) {
+    DCHECK(vd.Is1S());
+    Emit(FMOV_s_imm | Rd(vd) | ImmFP(imm));
+  } else {
+    DCHECK(vd.Is2S() | vd.Is4S());
+    Instr op = NEONModifiedImmediate_MOVI;
+    Instr q = vd.Is4S() ? NEON_Q : 0;
+    Emit(q | op | ImmNEONFP(imm) | NEONCmode(0xf) | Rd(vd));
+  }
+}
+
+void Assembler::fmov(const Register& rd, const VRegister& fn) {
+  DCHECK_EQ(rd.SizeInBits(), fn.SizeInBits());
   FPIntegerConvertOp op = rd.Is32Bits() ? FMOV_ws : FMOV_xd;
   Emit(op | Rd(rd) | Rn(fn));
 }
 
-
-void Assembler::fmov(FPRegister fd, Register rn) {
-  DCHECK(fd.SizeInBits() == rn.SizeInBits());
-  FPIntegerConvertOp op = fd.Is32Bits() ? FMOV_sw : FMOV_dx;
-  Emit(op | Rd(fd) | Rn(rn));
-}
-
-
-void Assembler::fmov(FPRegister fd, FPRegister fn) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  Emit(FPType(fd) | FMOV | Rd(fd) | Rn(fn));
-}
-
-
-void Assembler::fadd(const FPRegister& fd,
-                     const FPRegister& fn,
-                     const FPRegister& fm) {
-  FPDataProcessing2Source(fd, fn, fm, FADD);
-}
-
-
-void Assembler::fsub(const FPRegister& fd,
-                     const FPRegister& fn,
-                     const FPRegister& fm) {
-  FPDataProcessing2Source(fd, fn, fm, FSUB);
-}
-
-
-void Assembler::fmul(const FPRegister& fd,
-                     const FPRegister& fn,
-                     const FPRegister& fm) {
-  FPDataProcessing2Source(fd, fn, fm, FMUL);
-}
-
-
-void Assembler::fmadd(const FPRegister& fd,
-                      const FPRegister& fn,
-                      const FPRegister& fm,
-                      const FPRegister& fa) {
+void Assembler::fmov(const VRegister& vd, const Register& rn) {
+  DCHECK_EQ(vd.SizeInBits(), rn.SizeInBits());
+  FPIntegerConvertOp op = vd.Is32Bits() ? FMOV_sw : FMOV_dx;
+  Emit(op | Rd(vd) | Rn(rn));
+}
+
+void Assembler::fmov(const VRegister& vd, const VRegister& vn) {
+  DCHECK_EQ(vd.SizeInBits(), vn.SizeInBits());
+  Emit(FPType(vd) | FMOV | Rd(vd) | Rn(vn));
+}
+
+void Assembler::fmov(const VRegister& vd, int index, const Register& rn) {
+  DCHECK((index == 1) && vd.Is1D() && rn.IsX());
+  USE(index);
+  Emit(FMOV_d1_x | Rd(vd) | Rn(rn));
+}
+
+void Assembler::fmov(const Register& rd, const VRegister& vn, int index) {
+  DCHECK((index == 1) && vn.Is1D() && rd.IsX());
+  USE(index);
+  Emit(FMOV_x_d1 | Rd(rd) | Rn(vn));
+}
+
+void Assembler::fmadd(const VRegister& fd, const VRegister& fn,
+                      const VRegister& fm, const VRegister& fa) {
   FPDataProcessing3Source(fd, fn, fm, fa, fd.Is32Bits() ? FMADD_s : FMADD_d);
 }
 
-
-void Assembler::fmsub(const FPRegister& fd,
-                      const FPRegister& fn,
-                      const FPRegister& fm,
-                      const FPRegister& fa) {
+void Assembler::fmsub(const VRegister& fd, const VRegister& fn,
+                      const VRegister& fm, const VRegister& fa) {
   FPDataProcessing3Source(fd, fn, fm, fa, fd.Is32Bits() ? FMSUB_s : FMSUB_d);
 }
 
-
-void Assembler::fnmadd(const FPRegister& fd,
-                       const FPRegister& fn,
-                       const FPRegister& fm,
-                       const FPRegister& fa) {
+void Assembler::fnmadd(const VRegister& fd, const VRegister& fn,
+                       const VRegister& fm, const VRegister& fa) {
   FPDataProcessing3Source(fd, fn, fm, fa, fd.Is32Bits() ? FNMADD_s : FNMADD_d);
 }
 
-
-void Assembler::fnmsub(const FPRegister& fd,
-                       const FPRegister& fn,
-                       const FPRegister& fm,
-                       const FPRegister& fa) {
+void Assembler::fnmsub(const VRegister& fd, const VRegister& fn,
+                       const VRegister& fm, const VRegister& fa) {
   FPDataProcessing3Source(fd, fn, fm, fa, fd.Is32Bits() ? FNMSUB_s : FNMSUB_d);
 }
 
-
-void Assembler::fdiv(const FPRegister& fd,
-                     const FPRegister& fn,
-                     const FPRegister& fm) {
-  FPDataProcessing2Source(fd, fn, fm, FDIV);
-}
-
-
-void Assembler::fmax(const FPRegister& fd,
-                     const FPRegister& fn,
-                     const FPRegister& fm) {
-  FPDataProcessing2Source(fd, fn, fm, FMAX);
-}
-
-
-void Assembler::fmaxnm(const FPRegister& fd,
-                       const FPRegister& fn,
-                       const FPRegister& fm) {
-  FPDataProcessing2Source(fd, fn, fm, FMAXNM);
-}
-
-
-void Assembler::fmin(const FPRegister& fd,
-                     const FPRegister& fn,
-                     const FPRegister& fm) {
-  FPDataProcessing2Source(fd, fn, fm, FMIN);
-}
-
-
-void Assembler::fminnm(const FPRegister& fd,
-                       const FPRegister& fn,
-                       const FPRegister& fm) {
-  FPDataProcessing2Source(fd, fn, fm, FMINNM);
-}
-
-
-void Assembler::fabs(const FPRegister& fd,
-                     const FPRegister& fn) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  FPDataProcessing1Source(fd, fn, FABS);
-}
-
-
-void Assembler::fneg(const FPRegister& fd,
-                     const FPRegister& fn) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  FPDataProcessing1Source(fd, fn, FNEG);
-}
-
-
-void Assembler::fsqrt(const FPRegister& fd,
-                      const FPRegister& fn) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  FPDataProcessing1Source(fd, fn, FSQRT);
-}
-
-
-void Assembler::frinta(const FPRegister& fd,
-                       const FPRegister& fn) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  FPDataProcessing1Source(fd, fn, FRINTA);
-}
-
-
-void Assembler::frintm(const FPRegister& fd,
-                       const FPRegister& fn) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  FPDataProcessing1Source(fd, fn, FRINTM);
-}
-
-
-void Assembler::frintn(const FPRegister& fd,
-                       const FPRegister& fn) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  FPDataProcessing1Source(fd, fn, FRINTN);
-}
-
-
-void Assembler::frintp(const FPRegister& fd, const FPRegister& fn) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  FPDataProcessing1Source(fd, fn, FRINTP);
-}
-
-
-void Assembler::frintz(const FPRegister& fd,
-                       const FPRegister& fn) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  FPDataProcessing1Source(fd, fn, FRINTZ);
-}
-
-
-void Assembler::fcmp(const FPRegister& fn,
-                     const FPRegister& fm) {
-  DCHECK(fn.SizeInBits() == fm.SizeInBits());
+void Assembler::fnmul(const VRegister& vd, const VRegister& vn,
+                      const VRegister& vm) {
+  DCHECK(AreSameSizeAndType(vd, vn, vm));
+  Instr op = vd.Is1S() ? FNMUL_s : FNMUL_d;
+  Emit(FPType(vd) | op | Rm(vm) | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fcmp(const VRegister& fn, const VRegister& fm) {
+  DCHECK_EQ(fn.SizeInBits(), fm.SizeInBits());
   Emit(FPType(fn) | FCMP | Rm(fm) | Rn(fn));
 }
 
-
-void Assembler::fcmp(const FPRegister& fn,
-                     double value) {
+void Assembler::fcmp(const VRegister& fn, double value) {
   USE(value);
   // Although the fcmp instruction can strictly only take an immediate value of
   // +0.0, we don't need to check for -0.0 because the sign of 0.0 doesn't
   // affect the result of the comparison.
-  DCHECK(value == 0.0);
+  DCHECK_EQ(value, 0.0);
   Emit(FPType(fn) | FCMP_zero | Rn(fn));
 }
 
-
-void Assembler::fccmp(const FPRegister& fn,
-                      const FPRegister& fm,
-                      StatusFlags nzcv,
-                      Condition cond) {
-  DCHECK(fn.SizeInBits() == fm.SizeInBits());
+void Assembler::fccmp(const VRegister& fn, const VRegister& fm,
+                      StatusFlags nzcv, Condition cond) {
+  DCHECK_EQ(fn.SizeInBits(), fm.SizeInBits());
   Emit(FPType(fn) | FCCMP | Rm(fm) | Cond(cond) | Rn(fn) | Nzcv(nzcv));
 }
 
-
-void Assembler::fcsel(const FPRegister& fd,
-                      const FPRegister& fn,
-                      const FPRegister& fm,
-                      Condition cond) {
-  DCHECK(fd.SizeInBits() == fn.SizeInBits());
-  DCHECK(fd.SizeInBits() == fm.SizeInBits());
+void Assembler::fcsel(const VRegister& fd, const VRegister& fn,
+                      const VRegister& fm, Condition cond) {
+  DCHECK_EQ(fd.SizeInBits(), fn.SizeInBits());
+  DCHECK_EQ(fd.SizeInBits(), fm.SizeInBits());
   Emit(FPType(fd) | FCSEL | Rm(fm) | Cond(cond) | Rn(fn) | Rd(fd));
 }
 
-
-void Assembler::FPConvertToInt(const Register& rd,
-                               const FPRegister& fn,
-                               FPIntegerConvertOp op) {
-  Emit(SF(rd) | FPType(fn) | op | Rn(fn) | Rd(rd));
-}
-
-
-void Assembler::fcvt(const FPRegister& fd,
-                     const FPRegister& fn) {
-  if (fd.Is64Bits()) {
-    // Convert float to double.
-    DCHECK(fn.Is32Bits());
-    FPDataProcessing1Source(fd, fn, FCVT_ds);
-  } else {
-    // Convert double to float.
-    DCHECK(fn.Is64Bits());
-    FPDataProcessing1Source(fd, fn, FCVT_sd);
-  }
-}
-
-
-void Assembler::fcvtau(const Register& rd, const FPRegister& fn) {
-  FPConvertToInt(rd, fn, FCVTAU);
-}
-
-
-void Assembler::fcvtas(const Register& rd, const FPRegister& fn) {
-  FPConvertToInt(rd, fn, FCVTAS);
-}
-
-
-void Assembler::fcvtmu(const Register& rd, const FPRegister& fn) {
-  FPConvertToInt(rd, fn, FCVTMU);
-}
-
-
-void Assembler::fcvtms(const Register& rd, const FPRegister& fn) {
-  FPConvertToInt(rd, fn, FCVTMS);
-}
-
-
-void Assembler::fcvtnu(const Register& rd, const FPRegister& fn) {
-  FPConvertToInt(rd, fn, FCVTNU);
-}
-
-
-void Assembler::fcvtns(const Register& rd, const FPRegister& fn) {
-  FPConvertToInt(rd, fn, FCVTNS);
-}
-
-
-void Assembler::fcvtzu(const Register& rd, const FPRegister& fn) {
-  FPConvertToInt(rd, fn, FCVTZU);
-}
-
-
-void Assembler::fcvtzs(const Register& rd, const FPRegister& fn) {
-  FPConvertToInt(rd, fn, FCVTZS);
-}
-
-
-void Assembler::scvtf(const FPRegister& fd,
-                      const Register& rn,
-                      unsigned fbits) {
+void Assembler::NEONFPConvertToInt(const Register& rd, const VRegister& vn,
+                                   Instr op) {
+  Emit(SF(rd) | FPType(vn) | op | Rn(vn) | Rd(rd));
+}
+
+void Assembler::NEONFPConvertToInt(const VRegister& vd, const VRegister& vn,
+                                   Instr op) {
+  if (vn.IsScalar()) {
+    DCHECK((vd.Is1S() && vn.Is1S()) || (vd.Is1D() && vn.Is1D()));
+    op |= NEON_Q | NEONScalar;
+  }
+  Emit(FPFormat(vn) | op | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fcvt(const VRegister& vd, const VRegister& vn) {
+  FPDataProcessing1SourceOp op;
+  if (vd.Is1D()) {
+    DCHECK(vn.Is1S() || vn.Is1H());
+    op = vn.Is1S() ? FCVT_ds : FCVT_dh;
+  } else if (vd.Is1S()) {
+    DCHECK(vn.Is1D() || vn.Is1H());
+    op = vn.Is1D() ? FCVT_sd : FCVT_sh;
+  } else {
+    DCHECK(vd.Is1H());
+    DCHECK(vn.Is1D() || vn.Is1S());
+    op = vn.Is1D() ? FCVT_hd : FCVT_hs;
+  }
+  FPDataProcessing1Source(vd, vn, op);
+}
+
+void Assembler::fcvtl(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vd.Is4S() && vn.Is4H()) || (vd.Is2D() && vn.Is2S()));
+  Instr format = vd.Is2D() ? (1 << NEONSize_offset) : 0;
+  Emit(format | NEON_FCVTL | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fcvtl2(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vd.Is4S() && vn.Is8H()) || (vd.Is2D() && vn.Is4S()));
+  Instr format = vd.Is2D() ? (1 << NEONSize_offset) : 0;
+  Emit(NEON_Q | format | NEON_FCVTL | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fcvtn(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vn.Is4S() && vd.Is4H()) || (vn.Is2D() && vd.Is2S()));
+  Instr format = vn.Is2D() ? (1 << NEONSize_offset) : 0;
+  Emit(format | NEON_FCVTN | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fcvtn2(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vn.Is4S() && vd.Is8H()) || (vn.Is2D() && vd.Is4S()));
+  Instr format = vn.Is2D() ? (1 << NEONSize_offset) : 0;
+  Emit(NEON_Q | format | NEON_FCVTN | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fcvtxn(const VRegister& vd, const VRegister& vn) {
+  Instr format = 1 << NEONSize_offset;
+  if (vd.IsScalar()) {
+    DCHECK(vd.Is1S() && vn.Is1D());
+    Emit(format | NEON_FCVTXN_scalar | Rn(vn) | Rd(vd));
+  } else {
+    DCHECK(vd.Is2S() && vn.Is2D());
+    Emit(format | NEON_FCVTXN | Rn(vn) | Rd(vd));
+  }
+}
+
+void Assembler::fcvtxn2(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.Is4S() && vn.Is2D());
+  Instr format = 1 << NEONSize_offset;
+  Emit(NEON_Q | format | NEON_FCVTXN | Rn(vn) | Rd(vd));
+}
+
+#define NEON_FP2REGMISC_FCVT_LIST(V) \
+  V(fcvtnu, NEON_FCVTNU, FCVTNU)     \
+  V(fcvtns, NEON_FCVTNS, FCVTNS)     \
+  V(fcvtpu, NEON_FCVTPU, FCVTPU)     \
+  V(fcvtps, NEON_FCVTPS, FCVTPS)     \
+  V(fcvtmu, NEON_FCVTMU, FCVTMU)     \
+  V(fcvtms, NEON_FCVTMS, FCVTMS)     \
+  V(fcvtau, NEON_FCVTAU, FCVTAU)     \
+  V(fcvtas, NEON_FCVTAS, FCVTAS)
+
+#define DEFINE_ASM_FUNCS(FN, VEC_OP, SCA_OP)                     \
+  void Assembler::FN(const Register& rd, const VRegister& vn) {  \
+    NEONFPConvertToInt(rd, vn, SCA_OP);                          \
+  }                                                              \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn) { \
+    NEONFPConvertToInt(vd, vn, VEC_OP);                          \
+  }
+NEON_FP2REGMISC_FCVT_LIST(DEFINE_ASM_FUNCS)
+#undef DEFINE_ASM_FUNCS
+
+void Assembler::scvtf(const VRegister& vd, const VRegister& vn, int fbits) {
+  DCHECK_GE(fbits, 0);
   if (fbits == 0) {
-    Emit(SF(rn) | FPType(fd) | SCVTF | Rn(rn) | Rd(fd));
-  } else {
-    Emit(SF(rn) | FPType(fd) | SCVTF_fixed | FPScale(64 - fbits) | Rn(rn) |
-         Rd(fd));
-  }
-}
-
-
-void Assembler::ucvtf(const FPRegister& fd,
-                      const Register& rn,
-                      unsigned fbits) {
+    NEONFP2RegMisc(vd, vn, NEON_SCVTF);
+  } else {
+    DCHECK(vd.Is1D() || vd.Is1S() || vd.Is2D() || vd.Is2S() || vd.Is4S());
+    NEONShiftRightImmediate(vd, vn, fbits, NEON_SCVTF_imm);
+  }
+}
+
+void Assembler::ucvtf(const VRegister& vd, const VRegister& vn, int fbits) {
+  DCHECK_GE(fbits, 0);
+  if (fbits == 0) {
+    NEONFP2RegMisc(vd, vn, NEON_UCVTF);
+  } else {
+    DCHECK(vd.Is1D() || vd.Is1S() || vd.Is2D() || vd.Is2S() || vd.Is4S());
+    NEONShiftRightImmediate(vd, vn, fbits, NEON_UCVTF_imm);
+  }
+}
+
+void Assembler::scvtf(const VRegister& vd, const Register& rn, int fbits) {
+  DCHECK_GE(fbits, 0);
+  if (fbits == 0) {
+    Emit(SF(rn) | FPType(vd) | SCVTF | Rn(rn) | Rd(vd));
+  } else {
+    Emit(SF(rn) | FPType(vd) | SCVTF_fixed | FPScale(64 - fbits) | Rn(rn) |
+         Rd(vd));
+  }
+}
+
+void Assembler::ucvtf(const VRegister& fd, const Register& rn, int fbits) {
+  DCHECK_GE(fbits, 0);
   if (fbits == 0) {
     Emit(SF(rn) | FPType(fd) | UCVTF | Rn(rn) | Rd(fd));
   } else {
     Emit(SF(rn) | FPType(fd) | UCVTF_fixed | FPScale(64 - fbits) | Rn(rn) |
          Rd(fd));
   }
 }
 
+void Assembler::NEON3Same(const VRegister& vd, const VRegister& vn,
+                          const VRegister& vm, NEON3SameOp vop) {
+  DCHECK(AreSameFormat(vd, vn, vm));
+  DCHECK(vd.IsVector() || !vd.IsQ());
+
+  Instr format, op = vop;
+  if (vd.IsScalar()) {
+    op |= NEON_Q | NEONScalar;
+    format = SFormat(vd);
+  } else {
+    format = VFormat(vd);
+  }
+
+  Emit(format | op | Rm(vm) | Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEONFP3Same(const VRegister& vd, const VRegister& vn,
+                            const VRegister& vm, Instr op) {
+  DCHECK(AreSameFormat(vd, vn, vm));
+  Emit(FPFormat(vd) | op | Rm(vm) | Rn(vn) | Rd(vd));
+}
+
+#define NEON_FP2REGMISC_LIST(V)                 \
+  V(fabs, NEON_FABS, FABS)                      \
+  V(fneg, NEON_FNEG, FNEG)                      \
+  V(fsqrt, NEON_FSQRT, FSQRT)                   \
+  V(frintn, NEON_FRINTN, FRINTN)                \
+  V(frinta, NEON_FRINTA, FRINTA)                \
+  V(frintp, NEON_FRINTP, FRINTP)                \
+  V(frintm, NEON_FRINTM, FRINTM)                \
+  V(frintx, NEON_FRINTX, FRINTX)                \
+  V(frintz, NEON_FRINTZ, FRINTZ)                \
+  V(frinti, NEON_FRINTI, FRINTI)                \
+  V(frsqrte, NEON_FRSQRTE, NEON_FRSQRTE_scalar) \
+  V(frecpe, NEON_FRECPE, NEON_FRECPE_scalar)
+
+#define DEFINE_ASM_FUNC(FN, VEC_OP, SCA_OP)                      \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn) { \
+    Instr op;                                                    \
+    if (vd.IsScalar()) {                                         \
+      DCHECK(vd.Is1S() || vd.Is1D());                            \
+      op = SCA_OP;                                               \
+    } else {                                                     \
+      DCHECK(vd.Is2S() || vd.Is2D() || vd.Is4S());               \
+      op = VEC_OP;                                               \
+    }                                                            \
+    NEONFP2RegMisc(vd, vn, op);                                  \
+  }
+NEON_FP2REGMISC_LIST(DEFINE_ASM_FUNC)
+#undef DEFINE_ASM_FUNC
+
+void Assembler::shll(const VRegister& vd, const VRegister& vn, int shift) {
+  DCHECK((vd.Is8H() && vn.Is8B() && shift == 8) ||
+         (vd.Is4S() && vn.Is4H() && shift == 16) ||
+         (vd.Is2D() && vn.Is2S() && shift == 32));
+  USE(shift);
+  Emit(VFormat(vn) | NEON_SHLL | Rn(vn) | Rd(vd));
+}
+
+void Assembler::shll2(const VRegister& vd, const VRegister& vn, int shift) {
+  USE(shift);
+  DCHECK((vd.Is8H() && vn.Is16B() && shift == 8) ||
+         (vd.Is4S() && vn.Is8H() && shift == 16) ||
+         (vd.Is2D() && vn.Is4S() && shift == 32));
+  Emit(VFormat(vn) | NEON_SHLL | Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEONFP2RegMisc(const VRegister& vd, const VRegister& vn,
+                               NEON2RegMiscOp vop, double value) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK_EQ(value, 0.0);
+  USE(value);
+
+  Instr op = vop;
+  if (vd.IsScalar()) {
+    DCHECK(vd.Is1S() || vd.Is1D());
+    op |= NEON_Q | NEONScalar;
+  } else {
+    DCHECK(vd.Is2S() || vd.Is2D() || vd.Is4S());
+  }
+
+  Emit(FPFormat(vd) | op | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fcmeq(const VRegister& vd, const VRegister& vn, double value) {
+  NEONFP2RegMisc(vd, vn, NEON_FCMEQ_zero, value);
+}
+
+void Assembler::fcmge(const VRegister& vd, const VRegister& vn, double value) {
+  NEONFP2RegMisc(vd, vn, NEON_FCMGE_zero, value);
+}
+
+void Assembler::fcmgt(const VRegister& vd, const VRegister& vn, double value) {
+  NEONFP2RegMisc(vd, vn, NEON_FCMGT_zero, value);
+}
+
+void Assembler::fcmle(const VRegister& vd, const VRegister& vn, double value) {
+  NEONFP2RegMisc(vd, vn, NEON_FCMLE_zero, value);
+}
+
+void Assembler::fcmlt(const VRegister& vd, const VRegister& vn, double value) {
+  NEONFP2RegMisc(vd, vn, NEON_FCMLT_zero, value);
+}
+
+void Assembler::frecpx(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsScalar());
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(vd.Is1S() || vd.Is1D());
+  Emit(FPFormat(vd) | NEON_FRECPX_scalar | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fcvtzs(const Register& rd, const VRegister& vn, int fbits) {
+  DCHECK(vn.Is1S() || vn.Is1D());
+  DCHECK((fbits >= 0) && (fbits <= rd.SizeInBits()));
+  if (fbits == 0) {
+    Emit(SF(rd) | FPType(vn) | FCVTZS | Rn(vn) | Rd(rd));
+  } else {
+    Emit(SF(rd) | FPType(vn) | FCVTZS_fixed | FPScale(64 - fbits) | Rn(vn) |
+         Rd(rd));
+  }
+}
+
+void Assembler::fcvtzs(const VRegister& vd, const VRegister& vn, int fbits) {
+  DCHECK_GE(fbits, 0);
+  if (fbits == 0) {
+    NEONFP2RegMisc(vd, vn, NEON_FCVTZS);
+  } else {
+    DCHECK(vd.Is1D() || vd.Is1S() || vd.Is2D() || vd.Is2S() || vd.Is4S());
+    NEONShiftRightImmediate(vd, vn, fbits, NEON_FCVTZS_imm);
+  }
+}
+
+void Assembler::fcvtzu(const Register& rd, const VRegister& vn, int fbits) {
+  DCHECK(vn.Is1S() || vn.Is1D());
+  DCHECK((fbits >= 0) && (fbits <= rd.SizeInBits()));
+  if (fbits == 0) {
+    Emit(SF(rd) | FPType(vn) | FCVTZU | Rn(vn) | Rd(rd));
+  } else {
+    Emit(SF(rd) | FPType(vn) | FCVTZU_fixed | FPScale(64 - fbits) | Rn(vn) |
+         Rd(rd));
+  }
+}
+
+void Assembler::fcvtzu(const VRegister& vd, const VRegister& vn, int fbits) {
+  DCHECK_GE(fbits, 0);
+  if (fbits == 0) {
+    NEONFP2RegMisc(vd, vn, NEON_FCVTZU);
+  } else {
+    DCHECK(vd.Is1D() || vd.Is1S() || vd.Is2D() || vd.Is2S() || vd.Is4S());
+    NEONShiftRightImmediate(vd, vn, fbits, NEON_FCVTZU_imm);
+  }
+}
+
+void Assembler::NEONFP2RegMisc(const VRegister& vd, const VRegister& vn,
+                               Instr op) {
+  DCHECK(AreSameFormat(vd, vn));
+  Emit(FPFormat(vd) | op | Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEON2RegMisc(const VRegister& vd, const VRegister& vn,
+                             NEON2RegMiscOp vop, int value) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK_EQ(value, 0);
+  USE(value);
+
+  Instr format, op = vop;
+  if (vd.IsScalar()) {
+    op |= NEON_Q | NEONScalar;
+    format = SFormat(vd);
+  } else {
+    format = VFormat(vd);
+  }
+
+  Emit(format | op | Rn(vn) | Rd(vd));
+}
+
+void Assembler::cmeq(const VRegister& vd, const VRegister& vn, int value) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEON2RegMisc(vd, vn, NEON_CMEQ_zero, value);
+}
+
+void Assembler::cmge(const VRegister& vd, const VRegister& vn, int value) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEON2RegMisc(vd, vn, NEON_CMGE_zero, value);
+}
+
+void Assembler::cmgt(const VRegister& vd, const VRegister& vn, int value) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEON2RegMisc(vd, vn, NEON_CMGT_zero, value);
+}
+
+void Assembler::cmle(const VRegister& vd, const VRegister& vn, int value) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEON2RegMisc(vd, vn, NEON_CMLE_zero, value);
+}
+
+void Assembler::cmlt(const VRegister& vd, const VRegister& vn, int value) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEON2RegMisc(vd, vn, NEON_CMLT_zero, value);
+}
+
+#define NEON_3SAME_LIST(V)                                         \
+  V(add, NEON_ADD, vd.IsVector() || vd.Is1D())                     \
+  V(addp, NEON_ADDP, vd.IsVector() || vd.Is1D())                   \
+  V(sub, NEON_SUB, vd.IsVector() || vd.Is1D())                     \
+  V(cmeq, NEON_CMEQ, vd.IsVector() || vd.Is1D())                   \
+  V(cmge, NEON_CMGE, vd.IsVector() || vd.Is1D())                   \
+  V(cmgt, NEON_CMGT, vd.IsVector() || vd.Is1D())                   \
+  V(cmhi, NEON_CMHI, vd.IsVector() || vd.Is1D())                   \
+  V(cmhs, NEON_CMHS, vd.IsVector() || vd.Is1D())                   \
+  V(cmtst, NEON_CMTST, vd.IsVector() || vd.Is1D())                 \
+  V(sshl, NEON_SSHL, vd.IsVector() || vd.Is1D())                   \
+  V(ushl, NEON_USHL, vd.IsVector() || vd.Is1D())                   \
+  V(srshl, NEON_SRSHL, vd.IsVector() || vd.Is1D())                 \
+  V(urshl, NEON_URSHL, vd.IsVector() || vd.Is1D())                 \
+  V(sqdmulh, NEON_SQDMULH, vd.IsLaneSizeH() || vd.IsLaneSizeS())   \
+  V(sqrdmulh, NEON_SQRDMULH, vd.IsLaneSizeH() || vd.IsLaneSizeS()) \
+  V(shadd, NEON_SHADD, vd.IsVector() && !vd.IsLaneSizeD())         \
+  V(uhadd, NEON_UHADD, vd.IsVector() && !vd.IsLaneSizeD())         \
+  V(srhadd, NEON_SRHADD, vd.IsVector() && !vd.IsLaneSizeD())       \
+  V(urhadd, NEON_URHADD, vd.IsVector() && !vd.IsLaneSizeD())       \
+  V(shsub, NEON_SHSUB, vd.IsVector() && !vd.IsLaneSizeD())         \
+  V(uhsub, NEON_UHSUB, vd.IsVector() && !vd.IsLaneSizeD())         \
+  V(smax, NEON_SMAX, vd.IsVector() && !vd.IsLaneSizeD())           \
+  V(smaxp, NEON_SMAXP, vd.IsVector() && !vd.IsLaneSizeD())         \
+  V(smin, NEON_SMIN, vd.IsVector() && !vd.IsLaneSizeD())           \
+  V(sminp, NEON_SMINP, vd.IsVector() && !vd.IsLaneSizeD())         \
+  V(umax, NEON_UMAX, vd.IsVector() && !vd.IsLaneSizeD())           \
+  V(umaxp, NEON_UMAXP, vd.IsVector() && !vd.IsLaneSizeD())         \
+  V(umin, NEON_UMIN, vd.IsVector() && !vd.IsLaneSizeD())           \
+  V(uminp, NEON_UMINP, vd.IsVector() && !vd.IsLaneSizeD())         \
+  V(saba, NEON_SABA, vd.IsVector() && !vd.IsLaneSizeD())           \
+  V(sabd, NEON_SABD, vd.IsVector() && !vd.IsLaneSizeD())           \
+  V(uaba, NEON_UABA, vd.IsVector() && !vd.IsLaneSizeD())           \
+  V(uabd, NEON_UABD, vd.IsVector() && !vd.IsLaneSizeD())           \
+  V(mla, NEON_MLA, vd.IsVector() && !vd.IsLaneSizeD())             \
+  V(mls, NEON_MLS, vd.IsVector() && !vd.IsLaneSizeD())             \
+  V(mul, NEON_MUL, vd.IsVector() && !vd.IsLaneSizeD())             \
+  V(and_, NEON_AND, vd.Is8B() || vd.Is16B())                       \
+  V(orr, NEON_ORR, vd.Is8B() || vd.Is16B())                        \
+  V(orn, NEON_ORN, vd.Is8B() || vd.Is16B())                        \
+  V(eor, NEON_EOR, vd.Is8B() || vd.Is16B())                        \
+  V(bic, NEON_BIC, vd.Is8B() || vd.Is16B())                        \
+  V(bit, NEON_BIT, vd.Is8B() || vd.Is16B())                        \
+  V(bif, NEON_BIF, vd.Is8B() || vd.Is16B())                        \
+  V(bsl, NEON_BSL, vd.Is8B() || vd.Is16B())                        \
+  V(pmul, NEON_PMUL, vd.Is8B() || vd.Is16B())                      \
+  V(uqadd, NEON_UQADD, true)                                       \
+  V(sqadd, NEON_SQADD, true)                                       \
+  V(uqsub, NEON_UQSUB, true)                                       \
+  V(sqsub, NEON_SQSUB, true)                                       \
+  V(sqshl, NEON_SQSHL, true)                                       \
+  V(uqshl, NEON_UQSHL, true)                                       \
+  V(sqrshl, NEON_SQRSHL, true)                                     \
+  V(uqrshl, NEON_UQRSHL, true)
+
+#define DEFINE_ASM_FUNC(FN, OP, AS)                            \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn, \
+                     const VRegister& vm) {                    \
+    DCHECK(AS);                                                \
+    NEON3Same(vd, vn, vm, OP);                                 \
+  }
+NEON_3SAME_LIST(DEFINE_ASM_FUNC)
+#undef DEFINE_ASM_FUNC
+
+#define NEON_FP3SAME_LIST(V)                    \
+  V(fadd, NEON_FADD, FADD)                      \
+  V(fsub, NEON_FSUB, FSUB)                      \
+  V(fmul, NEON_FMUL, FMUL)                      \
+  V(fdiv, NEON_FDIV, FDIV)                      \
+  V(fmax, NEON_FMAX, FMAX)                      \
+  V(fmaxnm, NEON_FMAXNM, FMAXNM)                \
+  V(fmin, NEON_FMIN, FMIN)                      \
+  V(fminnm, NEON_FMINNM, FMINNM)                \
+  V(fmulx, NEON_FMULX, NEON_FMULX_scalar)       \
+  V(frecps, NEON_FRECPS, NEON_FRECPS_scalar)    \
+  V(frsqrts, NEON_FRSQRTS, NEON_FRSQRTS_scalar) \
+  V(fabd, NEON_FABD, NEON_FABD_scalar)          \
+  V(fmla, NEON_FMLA, 0)                         \
+  V(fmls, NEON_FMLS, 0)                         \
+  V(facge, NEON_FACGE, NEON_FACGE_scalar)       \
+  V(facgt, NEON_FACGT, NEON_FACGT_scalar)       \
+  V(fcmeq, NEON_FCMEQ, NEON_FCMEQ_scalar)       \
+  V(fcmge, NEON_FCMGE, NEON_FCMGE_scalar)       \
+  V(fcmgt, NEON_FCMGT, NEON_FCMGT_scalar)       \
+  V(faddp, NEON_FADDP, 0)                       \
+  V(fmaxp, NEON_FMAXP, 0)                       \
+  V(fminp, NEON_FMINP, 0)                       \
+  V(fmaxnmp, NEON_FMAXNMP, 0)                   \
+  V(fminnmp, NEON_FMINNMP, 0)
+
+#define DEFINE_ASM_FUNC(FN, VEC_OP, SCA_OP)                    \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn, \
+                     const VRegister& vm) {                    \
+    Instr op;                                                  \
+    if ((SCA_OP != 0) && vd.IsScalar()) {                      \
+      DCHECK(vd.Is1S() || vd.Is1D());                          \
+      op = SCA_OP;                                             \
+    } else {                                                   \
+      DCHECK(vd.IsVector());                                   \
+      DCHECK(vd.Is2S() || vd.Is2D() || vd.Is4S());             \
+      op = VEC_OP;                                             \
+    }                                                          \
+    NEONFP3Same(vd, vn, vm, op);                               \
+  }
+NEON_FP3SAME_LIST(DEFINE_ASM_FUNC)
+#undef DEFINE_ASM_FUNC
+
+void Assembler::addp(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vd.Is1D() && vn.Is2D()));
+  Emit(SFormat(vd) | NEON_ADDP_scalar | Rn(vn) | Rd(vd));
+}
+
+void Assembler::faddp(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vd.Is1S() && vn.Is2S()) || (vd.Is1D() && vn.Is2D()));
+  Emit(FPFormat(vd) | NEON_FADDP_scalar | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fmaxp(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vd.Is1S() && vn.Is2S()) || (vd.Is1D() && vn.Is2D()));
+  Emit(FPFormat(vd) | NEON_FMAXP_scalar | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fminp(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vd.Is1S() && vn.Is2S()) || (vd.Is1D() && vn.Is2D()));
+  Emit(FPFormat(vd) | NEON_FMINP_scalar | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fmaxnmp(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vd.Is1S() && vn.Is2S()) || (vd.Is1D() && vn.Is2D()));
+  Emit(FPFormat(vd) | NEON_FMAXNMP_scalar | Rn(vn) | Rd(vd));
+}
+
+void Assembler::fminnmp(const VRegister& vd, const VRegister& vn) {
+  DCHECK((vd.Is1S() && vn.Is2S()) || (vd.Is1D() && vn.Is2D()));
+  Emit(FPFormat(vd) | NEON_FMINNMP_scalar | Rn(vn) | Rd(vd));
+}
+
+void Assembler::orr(const VRegister& vd, const int imm8, const int left_shift) {
+  NEONModifiedImmShiftLsl(vd, imm8, left_shift, NEONModifiedImmediate_ORR);
+}
+
+void Assembler::mov(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  if (vd.IsD()) {
+    orr(vd.V8B(), vn.V8B(), vn.V8B());
+  } else {
+    DCHECK(vd.IsQ());
+    orr(vd.V16B(), vn.V16B(), vn.V16B());
+  }
+}
+
+void Assembler::bic(const VRegister& vd, const int imm8, const int left_shift) {
+  NEONModifiedImmShiftLsl(vd, imm8, left_shift, NEONModifiedImmediate_BIC);
+}
+
+void Assembler::movi(const VRegister& vd, const uint64_t imm, Shift shift,
+                     const int shift_amount) {
+  DCHECK((shift == LSL) || (shift == MSL));
+  if (vd.Is2D() || vd.Is1D()) {
+    DCHECK_EQ(shift_amount, 0);
+    int imm8 = 0;
+    for (int i = 0; i < 8; ++i) {
+      int byte = (imm >> (i * 8)) & 0xff;
+      DCHECK((byte == 0) || (byte == 0xff));
+      if (byte == 0xff) {
+        imm8 |= (1 << i);
+      }
+    }
+    Instr q = vd.Is2D() ? NEON_Q : 0;
+    Emit(q | NEONModImmOp(1) | NEONModifiedImmediate_MOVI |
+         ImmNEONabcdefgh(imm8) | NEONCmode(0xe) | Rd(vd));
+  } else if (shift == LSL) {
+    NEONModifiedImmShiftLsl(vd, static_cast<int>(imm), shift_amount,
+                            NEONModifiedImmediate_MOVI);
+  } else {
+    NEONModifiedImmShiftMsl(vd, static_cast<int>(imm), shift_amount,
+                            NEONModifiedImmediate_MOVI);
+  }
+}
+
+void Assembler::mvn(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  if (vd.IsD()) {
+    not_(vd.V8B(), vn.V8B());
+  } else {
+    DCHECK(vd.IsQ());
+    not_(vd.V16B(), vn.V16B());
+  }
+}
+
+void Assembler::mvni(const VRegister& vd, const int imm8, Shift shift,
+                     const int shift_amount) {
+  DCHECK((shift == LSL) || (shift == MSL));
+  if (shift == LSL) {
+    NEONModifiedImmShiftLsl(vd, imm8, shift_amount, NEONModifiedImmediate_MVNI);
+  } else {
+    NEONModifiedImmShiftMsl(vd, imm8, shift_amount, NEONModifiedImmediate_MVNI);
+  }
+}
+
+void Assembler::NEONFPByElement(const VRegister& vd, const VRegister& vn,
+                                const VRegister& vm, int vm_index,
+                                NEONByIndexedElementOp vop) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK((vd.Is2S() && vm.Is1S()) || (vd.Is4S() && vm.Is1S()) ||
+         (vd.Is1S() && vm.Is1S()) || (vd.Is2D() && vm.Is1D()) ||
+         (vd.Is1D() && vm.Is1D()));
+  DCHECK((vm.Is1S() && (vm_index < 4)) || (vm.Is1D() && (vm_index < 2)));
+
+  Instr op = vop;
+  int index_num_bits = vm.Is1S() ? 2 : 1;
+  if (vd.IsScalar()) {
+    op |= NEON_Q | NEONScalar;
+  }
+
+  Emit(FPFormat(vd) | op | ImmNEONHLM(vm_index, index_num_bits) | Rm(vm) |
+       Rn(vn) | Rd(vd));
+}
+
+void Assembler::NEONByElement(const VRegister& vd, const VRegister& vn,
+                              const VRegister& vm, int vm_index,
+                              NEONByIndexedElementOp vop) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK((vd.Is4H() && vm.Is1H()) || (vd.Is8H() && vm.Is1H()) ||
+         (vd.Is1H() && vm.Is1H()) || (vd.Is2S() && vm.Is1S()) ||
+         (vd.Is4S() && vm.Is1S()) || (vd.Is1S() && vm.Is1S()));
+  DCHECK((vm.Is1H() && (vm.code() < 16) && (vm_index < 8)) ||
+         (vm.Is1S() && (vm_index < 4)));
+
+  Instr format, op = vop;
+  int index_num_bits = vm.Is1H() ? 3 : 2;
+  if (vd.IsScalar()) {
+    op |= NEONScalar | NEON_Q;
+    format = SFormat(vn);
+  } else {
+    format = VFormat(vn);
+  }
+  Emit(format | op | ImmNEONHLM(vm_index, index_num_bits) | Rm(vm) | Rn(vn) |
+       Rd(vd));
+}
+
+void Assembler::NEONByElementL(const VRegister& vd, const VRegister& vn,
+                               const VRegister& vm, int vm_index,
+                               NEONByIndexedElementOp vop) {
+  DCHECK((vd.Is4S() && vn.Is4H() && vm.Is1H()) ||
+         (vd.Is4S() && vn.Is8H() && vm.Is1H()) ||
+         (vd.Is1S() && vn.Is1H() && vm.Is1H()) ||
+         (vd.Is2D() && vn.Is2S() && vm.Is1S()) ||
+         (vd.Is2D() && vn.Is4S() && vm.Is1S()) ||
+         (vd.Is1D() && vn.Is1S() && vm.Is1S()));
+
+  DCHECK((vm.Is1H() && (vm.code() < 16) && (vm_index < 8)) ||
+         (vm.Is1S() && (vm_index < 4)));
+
+  Instr format, op = vop;
+  int index_num_bits = vm.Is1H() ? 3 : 2;
+  if (vd.IsScalar()) {
+    op |= NEONScalar | NEON_Q;
+    format = SFormat(vn);
+  } else {
+    format = VFormat(vn);
+  }
+  Emit(format | op | ImmNEONHLM(vm_index, index_num_bits) | Rm(vm) | Rn(vn) |
+       Rd(vd));
+}
+
+#define NEON_BYELEMENT_LIST(V)              \
+  V(mul, NEON_MUL_byelement, vn.IsVector()) \
+  V(mla, NEON_MLA_byelement, vn.IsVector()) \
+  V(mls, NEON_MLS_byelement, vn.IsVector()) \
+  V(sqdmulh, NEON_SQDMULH_byelement, true)  \
+  V(sqrdmulh, NEON_SQRDMULH_byelement, true)
+
+#define DEFINE_ASM_FUNC(FN, OP, AS)                            \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn, \
+                     const VRegister& vm, int vm_index) {      \
+    DCHECK(AS);                                                \
+    NEONByElement(vd, vn, vm, vm_index, OP);                   \
+  }
+NEON_BYELEMENT_LIST(DEFINE_ASM_FUNC)
+#undef DEFINE_ASM_FUNC
+
+#define NEON_FPBYELEMENT_LIST(V) \
+  V(fmul, NEON_FMUL_byelement)   \
+  V(fmla, NEON_FMLA_byelement)   \
+  V(fmls, NEON_FMLS_byelement)   \
+  V(fmulx, NEON_FMULX_byelement)
+
+#define DEFINE_ASM_FUNC(FN, OP)                                \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn, \
+                     const VRegister& vm, int vm_index) {      \
+    NEONFPByElement(vd, vn, vm, vm_index, OP);                 \
+  }
+NEON_FPBYELEMENT_LIST(DEFINE_ASM_FUNC)
+#undef DEFINE_ASM_FUNC
+
+#define NEON_BYELEMENT_LONG_LIST(V)                              \
+  V(sqdmull, NEON_SQDMULL_byelement, vn.IsScalar() || vn.IsD())  \
+  V(sqdmull2, NEON_SQDMULL_byelement, vn.IsVector() && vn.IsQ()) \
+  V(sqdmlal, NEON_SQDMLAL_byelement, vn.IsScalar() || vn.IsD())  \
+  V(sqdmlal2, NEON_SQDMLAL_byelement, vn.IsVector() && vn.IsQ()) \
+  V(sqdmlsl, NEON_SQDMLSL_byelement, vn.IsScalar() || vn.IsD())  \
+  V(sqdmlsl2, NEON_SQDMLSL_byelement, vn.IsVector() && vn.IsQ()) \
+  V(smull, NEON_SMULL_byelement, vn.IsVector() && vn.IsD())      \
+  V(smull2, NEON_SMULL_byelement, vn.IsVector() && vn.IsQ())     \
+  V(umull, NEON_UMULL_byelement, vn.IsVector() && vn.IsD())      \
+  V(umull2, NEON_UMULL_byelement, vn.IsVector() && vn.IsQ())     \
+  V(smlal, NEON_SMLAL_byelement, vn.IsVector() && vn.IsD())      \
+  V(smlal2, NEON_SMLAL_byelement, vn.IsVector() && vn.IsQ())     \
+  V(umlal, NEON_UMLAL_byelement, vn.IsVector() && vn.IsD())      \
+  V(umlal2, NEON_UMLAL_byelement, vn.IsVector() && vn.IsQ())     \
+  V(smlsl, NEON_SMLSL_byelement, vn.IsVector() && vn.IsD())      \
+  V(smlsl2, NEON_SMLSL_byelement, vn.IsVector() && vn.IsQ())     \
+  V(umlsl, NEON_UMLSL_byelement, vn.IsVector() && vn.IsD())      \
+  V(umlsl2, NEON_UMLSL_byelement, vn.IsVector() && vn.IsQ())
+
+#define DEFINE_ASM_FUNC(FN, OP, AS)                            \
+  void Assembler::FN(const VRegister& vd, const VRegister& vn, \
+                     const VRegister& vm, int vm_index) {      \
+    DCHECK(AS);                                                \
+    NEONByElementL(vd, vn, vm, vm_index, OP);                  \
+  }
+NEON_BYELEMENT_LONG_LIST(DEFINE_ASM_FUNC)
+#undef DEFINE_ASM_FUNC
+
+void Assembler::suqadd(const VRegister& vd, const VRegister& vn) {
+  NEON2RegMisc(vd, vn, NEON_SUQADD);
+}
+
+void Assembler::usqadd(const VRegister& vd, const VRegister& vn) {
+  NEON2RegMisc(vd, vn, NEON_USQADD);
+}
+
+void Assembler::abs(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEON2RegMisc(vd, vn, NEON_ABS);
+}
+
+void Assembler::sqabs(const VRegister& vd, const VRegister& vn) {
+  NEON2RegMisc(vd, vn, NEON_SQABS);
+}
+
+void Assembler::neg(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsVector() || vd.Is1D());
+  NEON2RegMisc(vd, vn, NEON_NEG);
+}
+
+void Assembler::sqneg(const VRegister& vd, const VRegister& vn) {
+  NEON2RegMisc(vd, vn, NEON_SQNEG);
+}
+
+void Assembler::NEONXtn(const VRegister& vd, const VRegister& vn,
+                        NEON2RegMiscOp vop) {
+  Instr format, op = vop;
+  if (vd.IsScalar()) {
+    DCHECK((vd.Is1B() && vn.Is1H()) || (vd.Is1H() && vn.Is1S()) ||
+           (vd.Is1S() && vn.Is1D()));
+    op |= NEON_Q | NEONScalar;
+    format = SFormat(vd);
+  } else {
+    DCHECK((vd.Is8B() && vn.Is8H()) || (vd.Is4H() && vn.Is4S()) ||
+           (vd.Is2S() && vn.Is2D()) || (vd.Is16B() && vn.Is8H()) ||
+           (vd.Is8H() && vn.Is4S()) || (vd.Is4S() && vn.Is2D()));
+    format = VFormat(vd);
+  }
+  Emit(format | op | Rn(vn) | Rd(vd));
+}
+
+void Assembler::xtn(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsVector() && vd.IsD());
+  NEONXtn(vd, vn, NEON_XTN);
+}
+
+void Assembler::xtn2(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsVector() && vd.IsQ());
+  NEONXtn(vd, vn, NEON_XTN);
+}
+
+void Assembler::sqxtn(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsScalar() || vd.IsD());
+  NEONXtn(vd, vn, NEON_SQXTN);
+}
+
+void Assembler::sqxtn2(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsVector() && vd.IsQ());
+  NEONXtn(vd, vn, NEON_SQXTN);
+}
+
+void Assembler::sqxtun(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsScalar() || vd.IsD());
+  NEONXtn(vd, vn, NEON_SQXTUN);
+}
+
+void Assembler::sqxtun2(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsVector() && vd.IsQ());
+  NEONXtn(vd, vn, NEON_SQXTUN);
+}
+
+void Assembler::uqxtn(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsScalar() || vd.IsD());
+  NEONXtn(vd, vn, NEON_UQXTN);
+}
+
+void Assembler::uqxtn2(const VRegister& vd, const VRegister& vn) {
+  DCHECK(vd.IsVector() && vd.IsQ());
+  NEONXtn(vd, vn, NEON_UQXTN);
+}
+
+// NEON NOT and RBIT are distinguised by bit 22, the bottom bit of "size".
+void Assembler::not_(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(vd.Is8B() || vd.Is16B());
+  Emit(VFormat(vd) | NEON_RBIT_NOT | Rn(vn) | Rd(vd));
+}
+
+void Assembler::rbit(const VRegister& vd, const VRegister& vn) {
+  DCHECK(AreSameFormat(vd, vn));
+  DCHECK(vd.Is8B() || vd.Is16B());
+  Emit(VFormat(vn) | (1 << NEONSize_offset) | NEON_RBIT_NOT | Rn(vn) | Rd(vd));
+}
+
+void Assembler::ext(const VRegister& vd, const VRegister& vn,
+                    const VRegister& vm, int index) {
+  DCHECK(AreSameFormat(vd, vn, vm));
+  DCHECK(vd.Is8B() || vd.Is16B());
+  DCHECK((0 <= index) && (index < vd.LaneCount()));
+  Emit(VFormat(vd) | NEON_EXT | Rm(vm) | ImmNEONExt(index) | Rn(vn) | Rd(vd));
+}
+
+void Assembler::dup(const VRegister& vd, const VRegister& vn, int vn_index) {
+  Instr q, scalar;
+
+  // We support vn arguments of the form vn.VxT() or vn.T(), where x is the
+  // number of lanes, and T is b, h, s or d.
+  int lane_size = vn.LaneSizeInBytes();
+  NEONFormatField format;
+  switch (lane_size) {
+    case 1:
+      format = NEON_16B;
+      break;
+    case 2:
+      format = NEON_8H;
+      break;
+    case 4:
+      format = NEON_4S;
+      break;
+    default:
+      DCHECK_EQ(lane_size, 8);
+      format = NEON_2D;
+      break;
+  }
+
+  if (vd.IsScalar()) {
+    q = NEON_Q;
+    scalar = NEONScalar;
+  } else {
+    DCHECK(!vd.Is1D());
+    q = vd.IsD() ? 0 : NEON_Q;
+    scalar = 0;
+  }
+  Emit(q | scalar | NEON_DUP_ELEMENT | ImmNEON5(format, vn_index) | Rn(vn) |
+       Rd(vd));
+}
 
 void Assembler::dcptr(Label* label) {
   RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE);
   if (label->is_bound()) {
     // The label is bound, so it does not need to be updated and the internal
     // reference should be emitted.
     //
     // In this case, label->pos() returns the offset of the label from the
     // start of the buffer.
     internal_reference_positions_.push_back(pc_offset());
@@ skipping 24 matching lines @@
     offset >>= kInstructionSizeLog2;
     DCHECK(is_int32(offset));
     uint32_t high16 = unsigned_bitextract_32(31, 16, offset);
     uint32_t low16 = unsigned_bitextract_32(15, 0, offset);
 
     brk(high16);
     brk(low16);
   }
 }
 
-
-// Note:
 // Below, a difference in case for the same letter indicates a
-// negated bit.
-// If b is 1, then B is 0.
-Instr Assembler::ImmFP32(float imm) {
-  DCHECK(IsImmFP32(imm));
-  // bits: aBbb.bbbc.defg.h000.0000.0000.0000.0000
-  uint32_t bits = float_to_rawbits(imm);
-  // bit7: a000.0000
-  uint32_t bit7 = ((bits >> 31) & 0x1) << 7;
-  // bit6: 0b00.0000
-  uint32_t bit6 = ((bits >> 29) & 0x1) << 6;
-  // bit5_to_0: 00cd.efgh
-  uint32_t bit5_to_0 = (bits >> 19) & 0x3f;
-
-  return (bit7 | bit6 | bit5_to_0) << ImmFP_offset;
-}
-
-
-Instr Assembler::ImmFP64(double imm) {
+// negated bit. If b is 1, then B is 0.
+uint32_t Assembler::FPToImm8(double imm) {
   DCHECK(IsImmFP64(imm));
   // bits: aBbb.bbbb.bbcd.efgh.0000.0000.0000.0000
   //       0000.0000.0000.0000.0000.0000.0000.0000
-  uint64_t bits = double_to_rawbits(imm);
+  uint64_t bits = bit_cast<uint64_t>(imm);
   // bit7: a000.0000
   uint64_t bit7 = ((bits >> 63) & 0x1) << 7;
   // bit6: 0b00.0000
   uint64_t bit6 = ((bits >> 61) & 0x1) << 6;
   // bit5_to_0: 00cd.efgh
   uint64_t bit5_to_0 = (bits >> 48) & 0x3f;
 
-  return static_cast<Instr>((bit7 | bit6 | bit5_to_0) << ImmFP_offset);
-}
-
+  return static_cast<uint32_t>(bit7 | bit6 | bit5_to_0);
+}
+
+Instr Assembler::ImmFP(double imm) { return FPToImm8(imm) << ImmFP_offset; }
+Instr Assembler::ImmNEONFP(double imm) {
+  return ImmNEONabcdefgh(FPToImm8(imm));
+}
 
 // Code generation helpers.
-void Assembler::MoveWide(const Register& rd,
-                         uint64_t imm,
-                         int shift,
+void Assembler::MoveWide(const Register& rd, uint64_t imm, int shift,
                          MoveWideImmediateOp mov_op) {
   // Ignore the top 32 bits of an immediate if we're moving to a W register.
   if (rd.Is32Bits()) {
     // Check that the top 32 bits are zero (a positive 32-bit number) or top
     // 33 bits are one (a negative 32-bit number, sign extended to 64 bits).
     DCHECK(((imm >> kWRegSizeInBits) == 0) ||
            ((imm >> (kWRegSizeInBits - 1)) == 0x1ffffffff));
     imm &= kWRegMask;
   }
 
@@ skipping 21 matching lines @@
       shift = 3;
     }
   }
 
   DCHECK(is_uint16(imm));
 
   Emit(SF(rd) | MoveWideImmediateFixed | mov_op | Rd(rd) |
        ImmMoveWide(static_cast<int>(imm)) | ShiftMoveWide(shift));
 }
 
-
-void Assembler::AddSub(const Register& rd,
-                       const Register& rn,
-                       const Operand& operand,
-                       FlagsUpdate S,
-                       AddSubOp op) {
-  DCHECK(rd.SizeInBits() == rn.SizeInBits());
+void Assembler::AddSub(const Register& rd, const Register& rn,
+                       const Operand& operand, FlagsUpdate S, AddSubOp op) {
+  DCHECK_EQ(rd.SizeInBits(), rn.SizeInBits());
   DCHECK(!operand.NeedsRelocation(this));
   if (operand.IsImmediate()) {
     int64_t immediate = operand.ImmediateValue();
     DCHECK(IsImmAddSub(immediate));
     Instr dest_reg = (S == SetFlags) ? Rd(rd) : RdSP(rd);
     Emit(SF(rd) | AddSubImmediateFixed | op | Flags(S) |
          ImmAddSub(static_cast<int>(immediate)) | dest_reg | RnSP(rn));
   } else if (operand.IsShiftedRegister()) {
-    DCHECK(operand.reg().SizeInBits() == rd.SizeInBits());
-    DCHECK(operand.shift() != ROR);
+    DCHECK_EQ(operand.reg().SizeInBits(), rd.SizeInBits());
+    DCHECK_NE(operand.shift(), ROR);
 
     // For instructions of the form:
     //   add/sub   wsp, <Wn>, <Wm> [, LSL #0-3 ]
     //   add/sub   <Wd>, wsp, <Wm> [, LSL #0-3 ]
     //   add/sub   wsp, wsp, <Wm> [, LSL #0-3 ]
     //   adds/subs <Wd>, wsp, <Wm> [, LSL #0-3 ]
     // or their 64-bit register equivalents, convert the operand from shifted to
     // extended register mode, and emit an add/sub extended instruction.
     if (rn.IsSP() || rd.IsSP()) {
       DCHECK(!(rd.IsSP() && (S == SetFlags)));
       DataProcExtendedRegister(rd, rn, operand.ToExtendedRegister(), S,
                                AddSubExtendedFixed | op);
     } else {
       DataProcShiftedRegister(rd, rn, operand, S, AddSubShiftedFixed | op);
     }
   } else {
     DCHECK(operand.IsExtendedRegister());
     DataProcExtendedRegister(rd, rn, operand, S, AddSubExtendedFixed | op);
   }
 }
 
-
-void Assembler::AddSubWithCarry(const Register& rd,
-                                const Register& rn,
-                                const Operand& operand,
-                                FlagsUpdate S,
+void Assembler::AddSubWithCarry(const Register& rd, const Register& rn,
+                                const Operand& operand, FlagsUpdate S,
                                 AddSubWithCarryOp op) {
-  DCHECK(rd.SizeInBits() == rn.SizeInBits());
-  DCHECK(rd.SizeInBits() == operand.reg().SizeInBits());
+  DCHECK_EQ(rd.SizeInBits(), rn.SizeInBits());
+  DCHECK_EQ(rd.SizeInBits(), operand.reg().SizeInBits());
   DCHECK(operand.IsShiftedRegister() && (operand.shift_amount() == 0));
   DCHECK(!operand.NeedsRelocation(this));
   Emit(SF(rd) | op | Flags(S) | Rm(operand.reg()) | Rn(rn) | Rd(rd));
 }
 
-
 void Assembler::hlt(int code) {
   DCHECK(is_uint16(code));
   Emit(HLT | ImmException(code));
 }
 
-
 void Assembler::brk(int code) {
   DCHECK(is_uint16(code));
   Emit(BRK | ImmException(code));
 }
 
-
 void Assembler::EmitStringData(const char* string) {
   size_t len = strlen(string) + 1;
-  DCHECK(RoundUp(len, kInstructionSize) <= static_cast<size_t>(kGap));
+  DCHECK_LE(RoundUp(len, kInstructionSize), static_cast<size_t>(kGap));
   EmitData(string, static_cast<int>(len));
   // Pad with NULL characters until pc_ is aligned.
   const char pad[] = {'\0', '\0', '\0', '\0'};
-  STATIC_ASSERT(sizeof(pad) == kInstructionSize);
+  static_assert(sizeof(pad) == kInstructionSize,
+                "Size of padding must match instruction size.");
   EmitData(pad, RoundUp(pc_offset(), kInstructionSize) - pc_offset());
 }
 
 
 void Assembler::debug(const char* message, uint32_t code, Instr params) {
 #ifdef USE_SIMULATOR
   // Don't generate simulator specific code if we are building a snapshot, which
   // might be run on real hardware.
   if (!serializer_enabled()) {
     // The arguments to the debug marker need to be contiguous in memory, so
@@ skipping 96 matching lines @@
 }
 
 
 void Assembler::DataProcessing1Source(const Register& rd,
                                       const Register& rn,
                                       DataProcessing1SourceOp op) {
   DCHECK(rd.SizeInBits() == rn.SizeInBits());
   Emit(SF(rn) | op | Rn(rn) | Rd(rd));
 }
 
-
-void Assembler::FPDataProcessing1Source(const FPRegister& fd,
-                                        const FPRegister& fn,
+void Assembler::FPDataProcessing1Source(const VRegister& vd,
+                                        const VRegister& vn,
                                         FPDataProcessing1SourceOp op) {
-  Emit(FPType(fn) | op | Rn(fn) | Rd(fd));
+  Emit(FPType(vn) | op | Rn(vn) | Rd(vd));
 }
 
-
-void Assembler::FPDataProcessing2Source(const FPRegister& fd,
-                                        const FPRegister& fn,
-                                        const FPRegister& fm,
+void Assembler::FPDataProcessing2Source(const VRegister& fd,
+                                        const VRegister& fn,
+                                        const VRegister& fm,
                                         FPDataProcessing2SourceOp op) {
   DCHECK(fd.SizeInBits() == fn.SizeInBits());
   DCHECK(fd.SizeInBits() == fm.SizeInBits());
   Emit(FPType(fd) | op | Rm(fm) | Rn(fn) | Rd(fd));
 }
 
-
-void Assembler::FPDataProcessing3Source(const FPRegister& fd,
-                                        const FPRegister& fn,
-                                        const FPRegister& fm,
-                                        const FPRegister& fa,
+void Assembler::FPDataProcessing3Source(const VRegister& fd,
+                                        const VRegister& fn,
+                                        const VRegister& fm,
+                                        const VRegister& fa,
                                         FPDataProcessing3SourceOp op) {
   DCHECK(AreSameSizeAndType(fd, fn, fm, fa));
   Emit(FPType(fd) | op | Rm(fm) | Rn(fn) | Rd(fd) | Ra(fa));
 }
 
+void Assembler::NEONModifiedImmShiftLsl(const VRegister& vd, const int imm8,
+                                        const int left_shift,
+                                        NEONModifiedImmediateOp op) {
+  DCHECK(vd.Is8B() || vd.Is16B() || vd.Is4H() || vd.Is8H() || vd.Is2S() ||
+         vd.Is4S());
+  DCHECK((left_shift == 0) || (left_shift == 8) || (left_shift == 16) ||
+         (left_shift == 24));
+  DCHECK(is_uint8(imm8));
+
+  int cmode_1, cmode_2, cmode_3;
+  if (vd.Is8B() || vd.Is16B()) {
+    DCHECK_EQ(op, NEONModifiedImmediate_MOVI);
+    cmode_1 = 1;
+    cmode_2 = 1;
+    cmode_3 = 1;
+  } else {
+    cmode_1 = (left_shift >> 3) & 1;
+    cmode_2 = left_shift >> 4;
+    cmode_3 = 0;
+    if (vd.Is4H() || vd.Is8H()) {
+      DCHECK((left_shift == 0) || (left_shift == 8));
+      cmode_3 = 1;
+    }
+  }
+  int cmode = (cmode_3 << 3) | (cmode_2 << 2) | (cmode_1 << 1);
+
+  Instr q = vd.IsQ() ? NEON_Q : 0;
+
+  Emit(q | op | ImmNEONabcdefgh(imm8) | NEONCmode(cmode) | Rd(vd));
+}
+
+void Assembler::NEONModifiedImmShiftMsl(const VRegister& vd, const int imm8,
+                                        const int shift_amount,
+                                        NEONModifiedImmediateOp op) {
+  DCHECK(vd.Is2S() || vd.Is4S());
+  DCHECK((shift_amount == 8) || (shift_amount == 16));
+  DCHECK(is_uint8(imm8));
+
+  int cmode_0 = (shift_amount >> 4) & 1;
+  int cmode = 0xc | cmode_0;
+
+  Instr q = vd.IsQ() ? NEON_Q : 0;
+
+  Emit(q | op | ImmNEONabcdefgh(imm8) | NEONCmode(cmode) | Rd(vd));
+}
 
 void Assembler::EmitShift(const Register& rd,
                           const Register& rn,
                           Shift shift,
                           unsigned shift_amount) {
   switch (shift) {
     case LSL:
       lsl(rd, rn, shift_amount);
       break;
     case LSR:
@@ skipping 79 matching lines @@
   return is_uint12(immediate) ||
          (is_uint12(immediate >> 12) && ((immediate & 0xfff) == 0));
 }
 
 void Assembler::LoadStore(const CPURegister& rt,
                           const MemOperand& addr,
                           LoadStoreOp op) {
   Instr memop = op | Rt(rt) | RnSP(addr.base());
 
   if (addr.IsImmediateOffset()) {
-    LSDataSize size = CalcLSDataSize(op);
+    unsigned size = CalcLSDataSize(op);
     if (IsImmLSScaled(addr.offset(), size)) {
       int offset = static_cast<int>(addr.offset());
       // Use the scaled addressing mode.
       Emit(LoadStoreUnsignedOffsetFixed | memop |
            ImmLSUnsigned(offset >> size));
     } else if (IsImmLSUnscaled(addr.offset())) {
       int offset = static_cast<int>(addr.offset());
       // Use the unscaled addressing mode.
       Emit(LoadStoreUnscaledOffsetFixed | memop | ImmLS(offset));
     } else {
@@ skipping 32 matching lines @@
       UNREACHABLE();
     }
   }
 }
 
 
 bool Assembler::IsImmLSUnscaled(int64_t offset) {
   return is_int9(offset);
 }
 
-
-bool Assembler::IsImmLSScaled(int64_t offset, LSDataSize size) {
+bool Assembler::IsImmLSScaled(int64_t offset, unsigned size) {
   bool offset_is_size_multiple = (((offset >> size) << size) == offset);
   return offset_is_size_multiple && is_uint12(offset >> size);
 }
 
-
-bool Assembler::IsImmLSPair(int64_t offset, LSDataSize size) {
+bool Assembler::IsImmLSPair(int64_t offset, unsigned size) {
   bool offset_is_size_multiple = (((offset >> size) << size) == offset);
   return offset_is_size_multiple && is_int7(offset >> size);
 }
 
 
 bool Assembler::IsImmLLiteral(int64_t offset) {
   int inst_size = static_cast<int>(kInstructionSizeLog2);
   bool offset_is_inst_multiple =
       (((offset >> inst_size) << inst_size) == offset);
   return offset_is_inst_multiple && is_intn(offset, ImmLLiteral_width);
@@ skipping 210 matching lines @@
 
 
 bool Assembler::IsImmConditionalCompare(int64_t immediate) {
   return is_uint5(immediate);
 }
 
 
 bool Assembler::IsImmFP32(float imm) {
   // Valid values will have the form:
   // aBbb.bbbc.defg.h000.0000.0000.0000.0000
-  uint32_t bits = float_to_rawbits(imm);
+  uint32_t bits = bit_cast<uint32_t>(imm);
   // bits[19..0] are cleared.
   if ((bits & 0x7ffff) != 0) {
     return false;
   }
 
   // bits[29..25] are all set or all cleared.
   uint32_t b_pattern = (bits >> 16) & 0x3e00;
   if (b_pattern != 0 && b_pattern != 0x3e00) {
     return false;
   }
 
   // bit[30] and bit[29] are opposite.
   if (((bits ^ (bits << 1)) & 0x40000000) == 0) {
     return false;
   }
 
   return true;
 }
 
 
 bool Assembler::IsImmFP64(double imm) {
   // Valid values will have the form:
   // aBbb.bbbb.bbcd.efgh.0000.0000.0000.0000
   // 0000.0000.0000.0000.0000.0000.0000.0000
-  uint64_t bits = double_to_rawbits(imm);
+  uint64_t bits = bit_cast<uint64_t>(imm);
   // bits[47..0] are cleared.
   if ((bits & 0xffffffffffffL) != 0) {
     return false;
   }
 
   // bits[61..54] are all set or all cleared.
   uint32_t b_pattern = (bits >> 48) & 0x3fc0;
   if (b_pattern != 0 && b_pattern != 0x3fc0) {
     return false;
   }
@@ skipping 330 matching lines @@
   movk(scratch, (target_offset >> 32) & 0xFFFF, 32);
   DCHECK((target_offset >> 48) == 0);
   add(rd, rd, scratch);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64