ARM64: Add NEON support

src/arm64/constants-arm64.h

Index: src/arm64/constants-arm64.h
diff --git a/src/arm64/constants-arm64.h b/src/arm64/constants-arm64.h
index ddaa30e98453fe4f07fd88b574748978f252ce70..f0ad47e13865cbb1339f9b73a5eff872f6e56e87 100644
--- a/src/arm64/constants-arm64.h
+++ b/src/arm64/constants-arm64.h
@@ -33,13 +33,13 @@ const unsigned kLoadLiteralScaleLog2 = 2;
 const unsigned kMaxLoadLiteralRange = 1 * MB;
 
 const int kNumberOfRegisters = 32;
-const int kNumberOfFPRegisters = 32;
+const int kNumberOfVRegisters = 32;
 // Callee saved registers are x19-x30(lr).
 const int kNumberOfCalleeSavedRegisters = 11;
 const int kFirstCalleeSavedRegisterIndex = 19;
 // Callee saved FP registers are d8-d15.
-const int kNumberOfCalleeSavedFPRegisters = 8;
-const int kFirstCalleeSavedFPRegisterIndex = 8;
+const int kNumberOfCalleeSavedVRegisters = 8;
+const int kFirstCalleeSavedVRegisterIndex = 8;
 // Callee saved registers with no specific purpose in JS are x19-x25.
 const unsigned kJSCalleeSavedRegList = 0x03f80000;
 const int kWRegSizeInBits = 32;
@@ -58,6 +58,17 @@ const int kDRegSizeInBits = 64;
 const int kDRegSizeInBitsLog2 = 6;
 const int kDRegSize = kDRegSizeInBits >> 3;
 const int kDRegSizeLog2 = kDRegSizeInBitsLog2 - 3;
+const int kDRegSizeInBytesLog2 = kDRegSizeInBitsLog2 - 3;
+const int kBRegSizeInBits = 8;
+const int kBRegSize = kBRegSizeInBits >> 3;
+const int kHRegSizeInBits = 16;
+const int kHRegSize = kHRegSizeInBits >> 3;
+const int kQRegSizeInBits = 128;
+const int kQRegSizeInBitsLog2 = 7;
+const int kQRegSize = kQRegSizeInBits >> 3;
+const int kQRegSizeLog2 = kQRegSizeInBitsLog2 - 3;
+const int kVRegSizeInBits = kQRegSizeInBits;
+const int kVRegSize = kVRegSizeInBits >> 3;
 const int64_t kWRegMask = 0x00000000ffffffffL;
 const int64_t kXRegMask = 0xffffffffffffffffL;
 const int64_t kSRegMask = 0x00000000ffffffffL;
@@ -110,12 +121,27 @@ const unsigned kDoubleWordSize = 64;
 const unsigned kDoubleWordSizeInBytes = kDoubleWordSize >> 3;
 const unsigned kQuadWordSize = 128;
 const unsigned kQuadWordSizeInBytes = kQuadWordSize >> 3;
+const int kMaxLanesPerVector = 16;
+
+const unsigned kAddressTagOffset = 56;
+const unsigned kAddressTagWidth = 8;
+const uint64_t kAddressTagMask = ((UINT64_C(1) << kAddressTagWidth) - 1)
+                                 << kAddressTagOffset;
+static_assert(kAddressTagMask == UINT64_C(0xff00000000000000),
+              "AddressTagMask must represent most-significant eight bits.");
+
 // AArch64 floating-point specifics. These match IEEE-754.
 const unsigned kDoubleMantissaBits = 52;
 const unsigned kDoubleExponentBits = 11;
 const unsigned kDoubleExponentBias = 1023;
 const unsigned kFloatMantissaBits = 23;
 const unsigned kFloatExponentBits = 8;
+const unsigned kFloatExponentBias = 127;
+const unsigned kFloat16MantissaBits = 10;
+const unsigned kFloat16ExponentBits = 5;
+const unsigned kFloat16ExponentBias = 15;
+
+typedef uint16_t float16;
 
 #define INSTRUCTION_FIELDS_LIST(V_)                     \
   /* Register fields */                                 \
@@ -126,7 +152,7 @@ const unsigned kFloatExponentBits = 8;
   V_(Rt, 4, 0, Bits)    /* Load dest / store source. */ \
   V_(Rt2, 14, 10, Bits) /* Load second dest /        */ \
                         /* store second source.      */ \
-  V_(Rs, 20, 16, Bits)  /* Store-exclusive status */    \
+  V_(Rs, 20, 16, Bits)  /* Store-exclusive status    */ \
   V_(PrefetchMode, 4, 0, Bits)                          \
                                                         \
   /* Common bits */                                     \
@@ -181,8 +207,22 @@ const unsigned kFloatExponentBits = 8;
   V_(ImmLS, 20, 12, SignedBits)                         \
   V_(ImmLSUnsigned, 21, 10, Bits)                       \
   V_(ImmLSPair, 21, 15, SignedBits)                     \
-  V_(SizeLS, 31, 30, Bits)                              \
   V_(ImmShiftLS, 12, 12, Bits)                          \
+  V_(LSOpc, 23, 22, Bits)                               \
+  V_(LSVector, 26, 26, Bits)                            \
+  V_(LSSize, 31, 30, Bits)                              \
+                                                        \
+  /* NEON generic fields */                             \
+  V_(NEONQ, 30, 30, Bits)                               \
+  V_(NEONSize, 23, 22, Bits)                            \
+  V_(NEONLSSize, 11, 10, Bits)                          \
+  V_(NEONS, 12, 12, Bits)                               \
+  V_(NEONL, 21, 21, Bits)                               \
+  V_(NEONM, 20, 20, Bits)                               \
+  V_(NEONH, 11, 11, Bits)                               \
+  V_(ImmNEONExt, 14, 11, Bits)                          \
+  V_(ImmNEON5, 20, 16, Bits)                            \
+  V_(ImmNEON4, 14, 11, Bits)                            \
                                                         \
   /* Other immediates */                                \
   V_(ImmUncondBranch, 25, 0, SignedBits)                \
@@ -206,7 +246,21 @@ const unsigned kFloatExponentBits = 8;
   V_(LoadStoreXNotExclusive, 23, 23, Bits)              \
   V_(LoadStoreXAcquireRelease, 15, 15, Bits)            \
   V_(LoadStoreXSizeLog2, 31, 30, Bits)                  \
-  V_(LoadStoreXPair, 21, 21, Bits)
+  V_(LoadStoreXPair, 21, 21, Bits)                      \
+                                                        \
+  /* NEON load/store */                                 \
+  V_(NEONLoad, 22, 22, Bits)                            \
+                                                        \
+  /* NEON Modified Immediate fields */                  \
+  V_(ImmNEONabc, 18, 16, Bits)                          \
+  V_(ImmNEONdefgh, 9, 5, Bits)                          \
+  V_(NEONModImmOp, 29, 29, Bits)                        \
+  V_(NEONCmode, 15, 12, Bits)                           \
+                                                        \
+  /* NEON Shift Immediate fields */                     \
+  V_(ImmNEONImmhImmb, 22, 16, Bits)                     \
+  V_(ImmNEONImmh, 22, 19, Bits)                         \
+  V_(ImmNEONImmb, 18, 16, Bits)
 
 #define SYSTEM_REGISTER_FIELDS_LIST(V_, M_)                                    \
 /* NZCV */                                                                     \
@@ -338,7 +392,8 @@ enum Shift {
   LSL = 0x0,
   LSR = 0x1,
   ASR = 0x2,
-  ROR = 0x3
+  ROR = 0x3,
+  MSL = 0x4
 };
 
 enum Extend {
@@ -411,6 +466,10 @@ enum SystemRegister {
 //   default:   printf("Unknown instruction\n");
 // }
 
+// Used to corrupt encodings by setting all bits when orred. Although currently
+// unallocated in AArch64, this encoding is not guaranteed to be undefined
+// indefinitely.
+const uint32_t kUnallocatedInstruction = 0xffffffff;
 
 // Generic fields.
 enum GenericInstrField {
@@ -420,6 +479,47 @@ enum GenericInstrField {
   FP64                 = 0x00400000
 };
 
+enum NEONFormatField {
+  NEONFormatFieldMask = 0x40C00000,
+  NEON_Q = 0x40000000,
+  NEON_8B = 0x00000000,
+  NEON_16B = NEON_8B | NEON_Q,
+  NEON_4H = 0x00400000,
+  NEON_8H = NEON_4H | NEON_Q,
+  NEON_2S = 0x00800000,
+  NEON_4S = NEON_2S | NEON_Q,
+  NEON_1D = 0x00C00000,
+  NEON_2D = 0x00C00000 | NEON_Q
+};
+
+enum NEONFPFormatField {
+  NEONFPFormatFieldMask = 0x40400000,
+  NEON_FP_2S = FP32,
+  NEON_FP_4S = FP32 | NEON_Q,
+  NEON_FP_2D = FP64 | NEON_Q
+};
+
+enum NEONLSFormatField {
+  NEONLSFormatFieldMask = 0x40000C00,
+  LS_NEON_8B = 0x00000000,
+  LS_NEON_16B = LS_NEON_8B | NEON_Q,
+  LS_NEON_4H = 0x00000400,
+  LS_NEON_8H = LS_NEON_4H | NEON_Q,
+  LS_NEON_2S = 0x00000800,
+  LS_NEON_4S = LS_NEON_2S | NEON_Q,
+  LS_NEON_1D = 0x00000C00,
+  LS_NEON_2D = LS_NEON_1D | NEON_Q
+};
+
+enum NEONScalarFormatField {
+  NEONScalarFormatFieldMask = 0x00C00000,
+  NEONScalar = 0x10000000,
+  NEON_B = 0x00000000,
+  NEON_H = 0x00400000,
+  NEON_S = 0x00800000,
+  NEON_D = 0x00C00000
+};
+
 // PC relative addressing.
 enum PCRelAddressingOp {
   PCRelAddressingFixed = 0x10000000,
@@ -713,16 +813,12 @@ enum LoadStorePairAnyOp {
   LoadStorePairAnyFixed = 0x28000000
 };
 
-#define LOAD_STORE_PAIR_OP_LIST(V)  \
-  V(STP, w,   0x00000000),          \
-  V(LDP, w,   0x00400000),          \
-  V(LDPSW, x, 0x40400000),          \
-  V(STP, x,   0x80000000),          \
-  V(LDP, x,   0x80400000),          \
-  V(STP, s,   0x04000000),          \
-  V(LDP, s,   0x04400000),          \
-  V(STP, d,   0x44000000),          \
-  V(LDP, d,   0x44400000)
+#define LOAD_STORE_PAIR_OP_LIST(V)                                         \
+  V(STP, w, 0x00000000)                                                    \
+  , V(LDP, w, 0x00400000), V(LDPSW, x, 0x40400000), V(STP, x, 0x80000000), \
+      V(LDP, x, 0x80400000), V(STP, s, 0x04000000), V(LDP, s, 0x04400000), \
+      V(STP, d, 0x44000000), V(LDP, d, 0x44400000), V(STP, q, 0x84000000), \
+      V(LDP, q, 0x84400000)
 
 // Load/store pair (post, pre and offset.)
 enum LoadStorePairOp {
@@ -777,25 +873,34 @@ enum LoadLiteralOp {
   LDR_d_lit        = LoadLiteralFixed | 0x44000000
 };
 
-#define LOAD_STORE_OP_LIST(V)     \
-  V(ST, RB, w,  0x00000000),  \
-  V(ST, RH, w,  0x40000000),  \
-  V(ST, R, w,   0x80000000),  \
-  V(ST, R, x,   0xC0000000),  \
-  V(LD, RB, w,  0x00400000),  \
-  V(LD, RH, w,  0x40400000),  \
-  V(LD, R, w,   0x80400000),  \
-  V(LD, R, x,   0xC0400000),  \
-  V(LD, RSB, x, 0x00800000),  \
-  V(LD, RSH, x, 0x40800000),  \
-  V(LD, RSW, x, 0x80800000),  \
-  V(LD, RSB, w, 0x00C00000),  \
-  V(LD, RSH, w, 0x40C00000),  \
-  V(ST, R, s,   0x84000000),  \
-  V(ST, R, d,   0xC4000000),  \
-  V(LD, R, s,   0x84400000),  \
-  V(LD, R, d,   0xC4400000)
-
+// clang-format off
+
+#define LOAD_STORE_OP_LIST(V)  \
+  V(ST, RB, w,  0x00000000),   \
+  V(ST, RH, w,  0x40000000),   \
+  V(ST, R, w,   0x80000000),   \
+  V(ST, R, x,   0xC0000000),   \
+  V(LD, RB, w,  0x00400000),   \
+  V(LD, RH, w,  0x40400000),   \
+  V(LD, R, w,   0x80400000),   \
+  V(LD, R, x,   0xC0400000),   \
+  V(LD, RSB, x, 0x00800000),   \
+  V(LD, RSH, x, 0x40800000),   \
+  V(LD, RSW, x, 0x80800000),   \
+  V(LD, RSB, w, 0x00C00000),   \
+  V(LD, RSH, w, 0x40C00000),   \
+  V(ST, R, b,   0x04000000),   \
+  V(ST, R, h,   0x44000000),   \
+  V(ST, R, s,   0x84000000),   \
+  V(ST, R, d,   0xC4000000),   \
+  V(ST, R, q,   0x04800000),   \
+  V(LD, R, b,   0x04400000),   \
+  V(LD, R, h,   0x44400000),   \
+  V(LD, R, s,   0x84400000),   \
+  V(LD, R, d,   0xC4400000),   \
+  V(LD, R, q,   0x04C00000)
+
+// clang-format on
 
 // Load/store unscaled offset.
 enum LoadStoreUnscaledOffsetOp {
@@ -810,11 +915,10 @@ enum LoadStoreUnscaledOffsetOp {
 
 // Load/store (post, pre, offset and unsigned.)
 enum LoadStoreOp {
-  LoadStoreOpMask   = 0xC4C00000,
-  #define LOAD_STORE(A, B, C, D)  \
-  A##B##_##C = D
+  LoadStoreMask = 0xC4C00000,
+#define LOAD_STORE(A, B, C, D) A##B##_##C = D
   LOAD_STORE_OP_LIST(LOAD_STORE),
-  #undef LOAD_STORE
+#undef LOAD_STORE
   PRFM = 0xC0800000
 };
 
@@ -1063,42 +1167,46 @@ enum FPImmediateOp {
 enum FPDataProcessing1SourceOp {
   FPDataProcessing1SourceFixed = 0x1E204000,
   FPDataProcessing1SourceFMask = 0x5F207C00,
-  FPDataProcessing1SourceMask  = 0xFFFFFC00,
-  FMOV_s   = FPDataProcessing1SourceFixed | 0x00000000,
-  FMOV_d   = FPDataProcessing1SourceFixed | FP64 | 0x00000000,
-  FMOV     = FMOV_s,
-  FABS_s   = FPDataProcessing1SourceFixed | 0x00008000,
-  FABS_d   = FPDataProcessing1SourceFixed | FP64 | 0x00008000,
-  FABS     = FABS_s,
-  FNEG_s   = FPDataProcessing1SourceFixed | 0x00010000,
-  FNEG_d   = FPDataProcessing1SourceFixed | FP64 | 0x00010000,
-  FNEG     = FNEG_s,
-  FSQRT_s  = FPDataProcessing1SourceFixed | 0x00018000,
-  FSQRT_d  = FPDataProcessing1SourceFixed | FP64 | 0x00018000,
-  FSQRT    = FSQRT_s,
-  FCVT_ds  = FPDataProcessing1SourceFixed | 0x00028000,
-  FCVT_sd  = FPDataProcessing1SourceFixed | FP64 | 0x00020000,
+  FPDataProcessing1SourceMask = 0xFFFFFC00,
+  FMOV_s = FPDataProcessing1SourceFixed | 0x00000000,
+  FMOV_d = FPDataProcessing1SourceFixed | FP64 | 0x00000000,
+  FMOV = FMOV_s,
+  FABS_s = FPDataProcessing1SourceFixed | 0x00008000,
+  FABS_d = FPDataProcessing1SourceFixed | FP64 | 0x00008000,
+  FABS = FABS_s,
+  FNEG_s = FPDataProcessing1SourceFixed | 0x00010000,
+  FNEG_d = FPDataProcessing1SourceFixed | FP64 | 0x00010000,
+  FNEG = FNEG_s,
+  FSQRT_s = FPDataProcessing1SourceFixed | 0x00018000,
+  FSQRT_d = FPDataProcessing1SourceFixed | FP64 | 0x00018000,
+  FSQRT = FSQRT_s,
+  FCVT_ds = FPDataProcessing1SourceFixed | 0x00028000,
+  FCVT_sd = FPDataProcessing1SourceFixed | FP64 | 0x00020000,
+  FCVT_hs = FPDataProcessing1SourceFixed | 0x00038000,
+  FCVT_hd = FPDataProcessing1SourceFixed | FP64 | 0x00038000,
+  FCVT_sh = FPDataProcessing1SourceFixed | 0x00C20000,
+  FCVT_dh = FPDataProcessing1SourceFixed | 0x00C28000,
   FRINTN_s = FPDataProcessing1SourceFixed | 0x00040000,
   FRINTN_d = FPDataProcessing1SourceFixed | FP64 | 0x00040000,
-  FRINTN   = FRINTN_s,
+  FRINTN = FRINTN_s,
   FRINTP_s = FPDataProcessing1SourceFixed | 0x00048000,
   FRINTP_d = FPDataProcessing1SourceFixed | FP64 | 0x00048000,
-  FRINTP   = FRINTP_s,
+  FRINTP = FRINTP_s,
   FRINTM_s = FPDataProcessing1SourceFixed | 0x00050000,
   FRINTM_d = FPDataProcessing1SourceFixed | FP64 | 0x00050000,
-  FRINTM   = FRINTM_s,
+  FRINTM = FRINTM_s,
   FRINTZ_s = FPDataProcessing1SourceFixed | 0x00058000,
   FRINTZ_d = FPDataProcessing1SourceFixed | FP64 | 0x00058000,
-  FRINTZ   = FRINTZ_s,
+  FRINTZ = FRINTZ_s,
   FRINTA_s = FPDataProcessing1SourceFixed | 0x00060000,
   FRINTA_d = FPDataProcessing1SourceFixed | FP64 | 0x00060000,
-  FRINTA   = FRINTA_s,
+  FRINTA = FRINTA_s,
   FRINTX_s = FPDataProcessing1SourceFixed | 0x00070000,
   FRINTX_d = FPDataProcessing1SourceFixed | FP64 | 0x00070000,
-  FRINTX   = FRINTX_s,
+  FRINTX = FRINTX_s,
   FRINTI_s = FPDataProcessing1SourceFixed | 0x00078000,
   FRINTI_d = FPDataProcessing1SourceFixed | FP64 | 0x00078000,
-  FRINTI   = FRINTI_s
+  FRINTI = FRINTI_s
 };
 
 // Floating point data processing 2 source.
@@ -1154,71 +1262,73 @@ enum FPDataProcessing3SourceOp {
 enum FPIntegerConvertOp {
   FPIntegerConvertFixed = 0x1E200000,
   FPIntegerConvertFMask = 0x5F20FC00,
-  FPIntegerConvertMask  = 0xFFFFFC00,
-  FCVTNS    = FPIntegerConvertFixed | 0x00000000,
+  FPIntegerConvertMask = 0xFFFFFC00,
+  FCVTNS = FPIntegerConvertFixed | 0x00000000,
   FCVTNS_ws = FCVTNS,
   FCVTNS_xs = FCVTNS | SixtyFourBits,
   FCVTNS_wd = FCVTNS | FP64,
   FCVTNS_xd = FCVTNS | SixtyFourBits | FP64,
-  FCVTNU    = FPIntegerConvertFixed | 0x00010000,
+  FCVTNU = FPIntegerConvertFixed | 0x00010000,
   FCVTNU_ws = FCVTNU,
   FCVTNU_xs = FCVTNU | SixtyFourBits,
   FCVTNU_wd = FCVTNU | FP64,
   FCVTNU_xd = FCVTNU | SixtyFourBits | FP64,
-  FCVTPS    = FPIntegerConvertFixed | 0x00080000,
+  FCVTPS = FPIntegerConvertFixed | 0x00080000,
   FCVTPS_ws = FCVTPS,
   FCVTPS_xs = FCVTPS | SixtyFourBits,
   FCVTPS_wd = FCVTPS | FP64,
   FCVTPS_xd = FCVTPS | SixtyFourBits | FP64,
-  FCVTPU    = FPIntegerConvertFixed | 0x00090000,
+  FCVTPU = FPIntegerConvertFixed | 0x00090000,
   FCVTPU_ws = FCVTPU,
   FCVTPU_xs = FCVTPU | SixtyFourBits,
   FCVTPU_wd = FCVTPU | FP64,
   FCVTPU_xd = FCVTPU | SixtyFourBits | FP64,
-  FCVTMS    = FPIntegerConvertFixed | 0x00100000,
+  FCVTMS = FPIntegerConvertFixed | 0x00100000,
   FCVTMS_ws = FCVTMS,
   FCVTMS_xs = FCVTMS | SixtyFourBits,
   FCVTMS_wd = FCVTMS | FP64,
   FCVTMS_xd = FCVTMS | SixtyFourBits | FP64,
-  FCVTMU    = FPIntegerConvertFixed | 0x00110000,
+  FCVTMU = FPIntegerConvertFixed | 0x00110000,
   FCVTMU_ws = FCVTMU,
   FCVTMU_xs = FCVTMU | SixtyFourBits,
   FCVTMU_wd = FCVTMU | FP64,
   FCVTMU_xd = FCVTMU | SixtyFourBits | FP64,
-  FCVTZS    = FPIntegerConvertFixed | 0x00180000,
+  FCVTZS = FPIntegerConvertFixed | 0x00180000,
   FCVTZS_ws = FCVTZS,
   FCVTZS_xs = FCVTZS | SixtyFourBits,
   FCVTZS_wd = FCVTZS | FP64,
   FCVTZS_xd = FCVTZS | SixtyFourBits | FP64,
-  FCVTZU    = FPIntegerConvertFixed | 0x00190000,
+  FCVTZU = FPIntegerConvertFixed | 0x00190000,
   FCVTZU_ws = FCVTZU,
   FCVTZU_xs = FCVTZU | SixtyFourBits,
   FCVTZU_wd = FCVTZU | FP64,
   FCVTZU_xd = FCVTZU | SixtyFourBits | FP64,
-  SCVTF     = FPIntegerConvertFixed | 0x00020000,
-  SCVTF_sw  = SCVTF,
-  SCVTF_sx  = SCVTF | SixtyFourBits,
-  SCVTF_dw  = SCVTF | FP64,
-  SCVTF_dx  = SCVTF | SixtyFourBits | FP64,
-  UCVTF     = FPIntegerConvertFixed | 0x00030000,
-  UCVTF_sw  = UCVTF,
-  UCVTF_sx  = UCVTF | SixtyFourBits,
-  UCVTF_dw  = UCVTF | FP64,
-  UCVTF_dx  = UCVTF | SixtyFourBits | FP64,
-  FCVTAS    = FPIntegerConvertFixed | 0x00040000,
+  SCVTF = FPIntegerConvertFixed | 0x00020000,
+  SCVTF_sw = SCVTF,
+  SCVTF_sx = SCVTF | SixtyFourBits,
+  SCVTF_dw = SCVTF | FP64,
+  SCVTF_dx = SCVTF | SixtyFourBits | FP64,
+  UCVTF = FPIntegerConvertFixed | 0x00030000,
+  UCVTF_sw = UCVTF,
+  UCVTF_sx = UCVTF | SixtyFourBits,
+  UCVTF_dw = UCVTF | FP64,
+  UCVTF_dx = UCVTF | SixtyFourBits | FP64,
+  FCVTAS = FPIntegerConvertFixed | 0x00040000,
   FCVTAS_ws = FCVTAS,
   FCVTAS_xs = FCVTAS | SixtyFourBits,
   FCVTAS_wd = FCVTAS | FP64,
   FCVTAS_xd = FCVTAS | SixtyFourBits | FP64,
-  FCVTAU    = FPIntegerConvertFixed | 0x00050000,
+  FCVTAU = FPIntegerConvertFixed | 0x00050000,
   FCVTAU_ws = FCVTAU,
   FCVTAU_xs = FCVTAU | SixtyFourBits,
   FCVTAU_wd = FCVTAU | FP64,
   FCVTAU_xd = FCVTAU | SixtyFourBits | FP64,
-  FMOV_ws   = FPIntegerConvertFixed | 0x00060000,
-  FMOV_sw   = FPIntegerConvertFixed | 0x00070000,
-  FMOV_xd   = FMOV_ws | SixtyFourBits | FP64,
-  FMOV_dx   = FMOV_sw | SixtyFourBits | FP64
+  FMOV_ws = FPIntegerConvertFixed | 0x00060000,
+  FMOV_sw = FPIntegerConvertFixed | 0x00070000,
+  FMOV_xd = FMOV_ws | SixtyFourBits | FP64,
+  FMOV_dx = FMOV_sw | SixtyFourBits | FP64,
+  FMOV_d1_x = FPIntegerConvertFixed | SixtyFourBits | 0x008F0000,
+  FMOV_x_d1 = FPIntegerConvertFixed | SixtyFourBits | 0x008E0000
 };
 
 // Conversion between fixed point and floating point.
@@ -1248,6 +1358,757 @@ enum FPFixedPointConvertOp {
   UCVTF_dx_fixed  = UCVTF_fixed | SixtyFourBits | FP64
 };
 
+// NEON instructions with two register operands.
+enum NEON2RegMiscOp {
+  NEON2RegMiscFixed = 0x0E200800,
+  NEON2RegMiscFMask = 0x9F3E0C00,
+  NEON2RegMiscMask = 0xBF3FFC00,
+  NEON2RegMiscUBit = 0x20000000,
+  NEON_REV64 = NEON2RegMiscFixed | 0x00000000,
+  NEON_REV32 = NEON2RegMiscFixed | 0x20000000,
+  NEON_REV16 = NEON2RegMiscFixed | 0x00001000,
+  NEON_SADDLP = NEON2RegMiscFixed | 0x00002000,
+  NEON_UADDLP = NEON_SADDLP | NEON2RegMiscUBit,
+  NEON_SUQADD = NEON2RegMiscFixed | 0x00003000,
+  NEON_USQADD = NEON_SUQADD | NEON2RegMiscUBit,
+  NEON_CLS = NEON2RegMiscFixed | 0x00004000,
+  NEON_CLZ = NEON2RegMiscFixed | 0x20004000,
+  NEON_CNT = NEON2RegMiscFixed | 0x00005000,
+  NEON_RBIT_NOT = NEON2RegMiscFixed | 0x20005000,
+  NEON_SADALP = NEON2RegMiscFixed | 0x00006000,
+  NEON_UADALP = NEON_SADALP | NEON2RegMiscUBit,
+  NEON_SQABS = NEON2RegMiscFixed | 0x00007000,
+  NEON_SQNEG = NEON2RegMiscFixed | 0x20007000,
+  NEON_CMGT_zero = NEON2RegMiscFixed | 0x00008000,
+  NEON_CMGE_zero = NEON2RegMiscFixed | 0x20008000,
+  NEON_CMEQ_zero = NEON2RegMiscFixed | 0x00009000,
+  NEON_CMLE_zero = NEON2RegMiscFixed | 0x20009000,
+  NEON_CMLT_zero = NEON2RegMiscFixed | 0x0000A000,
+  NEON_ABS = NEON2RegMiscFixed | 0x0000B000,
+  NEON_NEG = NEON2RegMiscFixed | 0x2000B000,
+  NEON_XTN = NEON2RegMiscFixed | 0x00012000,
+  NEON_SQXTUN = NEON2RegMiscFixed | 0x20012000,
+  NEON_SHLL = NEON2RegMiscFixed | 0x20013000,
+  NEON_SQXTN = NEON2RegMiscFixed | 0x00014000,
+  NEON_UQXTN = NEON_SQXTN | NEON2RegMiscUBit,
+
+  NEON2RegMiscOpcode = 0x0001F000,
+  NEON_RBIT_NOT_opcode = NEON_RBIT_NOT & NEON2RegMiscOpcode,
+  NEON_NEG_opcode = NEON_NEG & NEON2RegMiscOpcode,
+  NEON_XTN_opcode = NEON_XTN & NEON2RegMiscOpcode,
+  NEON_UQXTN_opcode = NEON_UQXTN & NEON2RegMiscOpcode,
+
+  // These instructions use only one bit of the size field. The other bit is
+  // used to distinguish between instructions.
+  NEON2RegMiscFPMask = NEON2RegMiscMask | 0x00800000,
+  NEON_FABS = NEON2RegMiscFixed | 0x0080F000,
+  NEON_FNEG = NEON2RegMiscFixed | 0x2080F000,
+  NEON_FCVTN = NEON2RegMiscFixed | 0x00016000,
+  NEON_FCVTXN = NEON2RegMiscFixed | 0x20016000,
+  NEON_FCVTL = NEON2RegMiscFixed | 0x00017000,
+  NEON_FRINTN = NEON2RegMiscFixed | 0x00018000,
+  NEON_FRINTA = NEON2RegMiscFixed | 0x20018000,
+  NEON_FRINTP = NEON2RegMiscFixed | 0x00818000,
+  NEON_FRINTM = NEON2RegMiscFixed | 0x00019000,
+  NEON_FRINTX = NEON2RegMiscFixed | 0x20019000,
+  NEON_FRINTZ = NEON2RegMiscFixed | 0x00819000,
+  NEON_FRINTI = NEON2RegMiscFixed | 0x20819000,
+  NEON_FCVTNS = NEON2RegMiscFixed | 0x0001A000,
+  NEON_FCVTNU = NEON_FCVTNS | NEON2RegMiscUBit,
+  NEON_FCVTPS = NEON2RegMiscFixed | 0x0081A000,
+  NEON_FCVTPU = NEON_FCVTPS | NEON2RegMiscUBit,
+  NEON_FCVTMS = NEON2RegMiscFixed | 0x0001B000,
+  NEON_FCVTMU = NEON_FCVTMS | NEON2RegMiscUBit,
+  NEON_FCVTZS = NEON2RegMiscFixed | 0x0081B000,
+  NEON_FCVTZU = NEON_FCVTZS | NEON2RegMiscUBit,
+  NEON_FCVTAS = NEON2RegMiscFixed | 0x0001C000,
+  NEON_FCVTAU = NEON_FCVTAS | NEON2RegMiscUBit,
+  NEON_FSQRT = NEON2RegMiscFixed | 0x2081F000,
+  NEON_SCVTF = NEON2RegMiscFixed | 0x0001D000,
+  NEON_UCVTF = NEON_SCVTF | NEON2RegMiscUBit,
+  NEON_URSQRTE = NEON2RegMiscFixed | 0x2081C000,
+  NEON_URECPE = NEON2RegMiscFixed | 0x0081C000,
+  NEON_FRSQRTE = NEON2RegMiscFixed | 0x2081D000,
+  NEON_FRECPE = NEON2RegMiscFixed | 0x0081D000,
+  NEON_FCMGT_zero = NEON2RegMiscFixed | 0x0080C000,
+  NEON_FCMGE_zero = NEON2RegMiscFixed | 0x2080C000,
+  NEON_FCMEQ_zero = NEON2RegMiscFixed | 0x0080D000,
+  NEON_FCMLE_zero = NEON2RegMiscFixed | 0x2080D000,
+  NEON_FCMLT_zero = NEON2RegMiscFixed | 0x0080E000,
+
+  NEON_FCVTL_opcode = NEON_FCVTL & NEON2RegMiscOpcode,
+  NEON_FCVTN_opcode = NEON_FCVTN & NEON2RegMiscOpcode
+};
+
+// NEON instructions with three same-type operands.
+enum NEON3SameOp {
+  NEON3SameFixed = 0x0E200400,
+  NEON3SameFMask = 0x9F200400,
+  NEON3SameMask = 0xBF20FC00,
+  NEON3SameUBit = 0x20000000,
+  NEON_ADD = NEON3SameFixed | 0x00008000,
+  NEON_ADDP = NEON3SameFixed | 0x0000B800,
+  NEON_SHADD = NEON3SameFixed | 0x00000000,
+  NEON_SHSUB = NEON3SameFixed | 0x00002000,
+  NEON_SRHADD = NEON3SameFixed | 0x00001000,
+  NEON_CMEQ = NEON3SameFixed | NEON3SameUBit | 0x00008800,
+  NEON_CMGE = NEON3SameFixed | 0x00003800,
+  NEON_CMGT = NEON3SameFixed | 0x00003000,
+  NEON_CMHI = NEON3SameFixed | NEON3SameUBit | NEON_CMGT,
+  NEON_CMHS = NEON3SameFixed | NEON3SameUBit | NEON_CMGE,
+  NEON_CMTST = NEON3SameFixed | 0x00008800,
+  NEON_MLA = NEON3SameFixed | 0x00009000,
+  NEON_MLS = NEON3SameFixed | 0x20009000,
+  NEON_MUL = NEON3SameFixed | 0x00009800,
+  NEON_PMUL = NEON3SameFixed | 0x20009800,
+  NEON_SRSHL = NEON3SameFixed | 0x00005000,
+  NEON_SQSHL = NEON3SameFixed | 0x00004800,
+  NEON_SQRSHL = NEON3SameFixed | 0x00005800,
+  NEON_SSHL = NEON3SameFixed | 0x00004000,
+  NEON_SMAX = NEON3SameFixed | 0x00006000,
+  NEON_SMAXP = NEON3SameFixed | 0x0000A000,
+  NEON_SMIN = NEON3SameFixed | 0x00006800,
+  NEON_SMINP = NEON3SameFixed | 0x0000A800,
+  NEON_SABD = NEON3SameFixed | 0x00007000,
+  NEON_SABA = NEON3SameFixed | 0x00007800,
+  NEON_UABD = NEON3SameFixed | NEON3SameUBit | NEON_SABD,
+  NEON_UABA = NEON3SameFixed | NEON3SameUBit | NEON_SABA,
+  NEON_SQADD = NEON3SameFixed | 0x00000800,
+  NEON_SQSUB = NEON3SameFixed | 0x00002800,
+  NEON_SUB = NEON3SameFixed | NEON3SameUBit | 0x00008000,
+  NEON_UHADD = NEON3SameFixed | NEON3SameUBit | NEON_SHADD,
+  NEON_UHSUB = NEON3SameFixed | NEON3SameUBit | NEON_SHSUB,
+  NEON_URHADD = NEON3SameFixed | NEON3SameUBit | NEON_SRHADD,
+  NEON_UMAX = NEON3SameFixed | NEON3SameUBit | NEON_SMAX,
+  NEON_UMAXP = NEON3SameFixed | NEON3SameUBit | NEON_SMAXP,
+  NEON_UMIN = NEON3SameFixed | NEON3SameUBit | NEON_SMIN,
+  NEON_UMINP = NEON3SameFixed | NEON3SameUBit | NEON_SMINP,
+  NEON_URSHL = NEON3SameFixed | NEON3SameUBit | NEON_SRSHL,
+  NEON_UQADD = NEON3SameFixed | NEON3SameUBit | NEON_SQADD,
+  NEON_UQRSHL = NEON3SameFixed | NEON3SameUBit | NEON_SQRSHL,
+  NEON_UQSHL = NEON3SameFixed | NEON3SameUBit | NEON_SQSHL,
+  NEON_UQSUB = NEON3SameFixed | NEON3SameUBit | NEON_SQSUB,
+  NEON_USHL = NEON3SameFixed | NEON3SameUBit | NEON_SSHL,
+  NEON_SQDMULH = NEON3SameFixed | 0x0000B000,
+  NEON_SQRDMULH = NEON3SameFixed | 0x2000B000,
+
+  // NEON floating point instructions with three same-type operands.
+  NEON3SameFPFixed = NEON3SameFixed | 0x0000C000,
+  NEON3SameFPFMask = NEON3SameFMask | 0x0000C000,
+  NEON3SameFPMask = NEON3SameMask | 0x00800000,
+  NEON_FADD = NEON3SameFixed | 0x0000D000,
+  NEON_FSUB = NEON3SameFixed | 0x0080D000,
+  NEON_FMUL = NEON3SameFixed | 0x2000D800,
+  NEON_FDIV = NEON3SameFixed | 0x2000F800,
+  NEON_FMAX = NEON3SameFixed | 0x0000F000,
+  NEON_FMAXNM = NEON3SameFixed | 0x0000C000,
+  NEON_FMAXP = NEON3SameFixed | 0x2000F000,
+  NEON_FMAXNMP = NEON3SameFixed | 0x2000C000,
+  NEON_FMIN = NEON3SameFixed | 0x0080F000,
+  NEON_FMINNM = NEON3SameFixed | 0x0080C000,
+  NEON_FMINP = NEON3SameFixed | 0x2080F000,
+  NEON_FMINNMP = NEON3SameFixed | 0x2080C000,
+  NEON_FMLA = NEON3SameFixed | 0x0000C800,
+  NEON_FMLS = NEON3SameFixed | 0x0080C800,
+  NEON_FMULX = NEON3SameFixed | 0x0000D800,
+  NEON_FRECPS = NEON3SameFixed | 0x0000F800,
+  NEON_FRSQRTS = NEON3SameFixed | 0x0080F800,
+  NEON_FABD = NEON3SameFixed | 0x2080D000,
+  NEON_FADDP = NEON3SameFixed | 0x2000D000,
+  NEON_FCMEQ = NEON3SameFixed | 0x0000E000,
+  NEON_FCMGE = NEON3SameFixed | 0x2000E000,
+  NEON_FCMGT = NEON3SameFixed | 0x2080E000,
+  NEON_FACGE = NEON3SameFixed | 0x2000E800,
+  NEON_FACGT = NEON3SameFixed | 0x2080E800,
+
+  // NEON logical instructions with three same-type operands.
+  NEON3SameLogicalFixed = NEON3SameFixed | 0x00001800,
+  NEON3SameLogicalFMask = NEON3SameFMask | 0x0000F800,
+  NEON3SameLogicalMask = 0xBFE0FC00,
+  NEON3SameLogicalFormatMask = NEON_Q,
+  NEON_AND = NEON3SameLogicalFixed | 0x00000000,
+  NEON_ORR = NEON3SameLogicalFixed | 0x00A00000,
+  NEON_ORN = NEON3SameLogicalFixed | 0x00C00000,
+  NEON_EOR = NEON3SameLogicalFixed | 0x20000000,
+  NEON_BIC = NEON3SameLogicalFixed | 0x00400000,
+  NEON_BIF = NEON3SameLogicalFixed | 0x20C00000,
+  NEON_BIT = NEON3SameLogicalFixed | 0x20800000,
+  NEON_BSL = NEON3SameLogicalFixed | 0x20400000
+};
+
+// NEON instructions with three different-type operands.
+enum NEON3DifferentOp {
+  NEON3DifferentFixed = 0x0E200000,
+  NEON3DifferentFMask = 0x9F200C00,
+  NEON3DifferentMask = 0xFF20FC00,
+  NEON_ADDHN = NEON3DifferentFixed | 0x00004000,
+  NEON_ADDHN2 = NEON_ADDHN | NEON_Q,
+  NEON_PMULL = NEON3DifferentFixed | 0x0000E000,
+  NEON_PMULL2 = NEON_PMULL | NEON_Q,
+  NEON_RADDHN = NEON3DifferentFixed | 0x20004000,
+  NEON_RADDHN2 = NEON_RADDHN | NEON_Q,
+  NEON_RSUBHN = NEON3DifferentFixed | 0x20006000,
+  NEON_RSUBHN2 = NEON_RSUBHN | NEON_Q,
+  NEON_SABAL = NEON3DifferentFixed | 0x00005000,
+  NEON_SABAL2 = NEON_SABAL | NEON_Q,
+  NEON_SABDL = NEON3DifferentFixed | 0x00007000,
+  NEON_SABDL2 = NEON_SABDL | NEON_Q,
+  NEON_SADDL = NEON3DifferentFixed | 0x00000000,
+  NEON_SADDL2 = NEON_SADDL | NEON_Q,
+  NEON_SADDW = NEON3DifferentFixed | 0x00001000,
+  NEON_SADDW2 = NEON_SADDW | NEON_Q,
+  NEON_SMLAL = NEON3DifferentFixed | 0x00008000,
+  NEON_SMLAL2 = NEON_SMLAL | NEON_Q,
+  NEON_SMLSL = NEON3DifferentFixed | 0x0000A000,
+  NEON_SMLSL2 = NEON_SMLSL | NEON_Q,
+  NEON_SMULL = NEON3DifferentFixed | 0x0000C000,
+  NEON_SMULL2 = NEON_SMULL | NEON_Q,
+  NEON_SSUBL = NEON3DifferentFixed | 0x00002000,
+  NEON_SSUBL2 = NEON_SSUBL | NEON_Q,
+  NEON_SSUBW = NEON3DifferentFixed | 0x00003000,
+  NEON_SSUBW2 = NEON_SSUBW | NEON_Q,
+  NEON_SQDMLAL = NEON3DifferentFixed | 0x00009000,
+  NEON_SQDMLAL2 = NEON_SQDMLAL | NEON_Q,
+  NEON_SQDMLSL = NEON3DifferentFixed | 0x0000B000,
+  NEON_SQDMLSL2 = NEON_SQDMLSL | NEON_Q,
+  NEON_SQDMULL = NEON3DifferentFixed | 0x0000D000,
+  NEON_SQDMULL2 = NEON_SQDMULL | NEON_Q,
+  NEON_SUBHN = NEON3DifferentFixed | 0x00006000,
+  NEON_SUBHN2 = NEON_SUBHN | NEON_Q,
+  NEON_UABAL = NEON_SABAL | NEON3SameUBit,
+  NEON_UABAL2 = NEON_UABAL | NEON_Q,
+  NEON_UABDL = NEON_SABDL | NEON3SameUBit,
+  NEON_UABDL2 = NEON_UABDL | NEON_Q,
+  NEON_UADDL = NEON_SADDL | NEON3SameUBit,
+  NEON_UADDL2 = NEON_UADDL | NEON_Q,
+  NEON_UADDW = NEON_SADDW | NEON3SameUBit,
+  NEON_UADDW2 = NEON_UADDW | NEON_Q,
+  NEON_UMLAL = NEON_SMLAL | NEON3SameUBit,
+  NEON_UMLAL2 = NEON_UMLAL | NEON_Q,
+  NEON_UMLSL = NEON_SMLSL | NEON3SameUBit,
+  NEON_UMLSL2 = NEON_UMLSL | NEON_Q,
+  NEON_UMULL = NEON_SMULL | NEON3SameUBit,
+  NEON_UMULL2 = NEON_UMULL | NEON_Q,
+  NEON_USUBL = NEON_SSUBL | NEON3SameUBit,
+  NEON_USUBL2 = NEON_USUBL | NEON_Q,
+  NEON_USUBW = NEON_SSUBW | NEON3SameUBit,
+  NEON_USUBW2 = NEON_USUBW | NEON_Q
+};
+
+// NEON instructions operating across vectors.
+enum NEONAcrossLanesOp {
+  NEONAcrossLanesFixed = 0x0E300800,
+  NEONAcrossLanesFMask = 0x9F3E0C00,
+  NEONAcrossLanesMask = 0xBF3FFC00,
+  NEON_ADDV = NEONAcrossLanesFixed | 0x0001B000,
+  NEON_SADDLV = NEONAcrossLanesFixed | 0x00003000,
+  NEON_UADDLV = NEONAcrossLanesFixed | 0x20003000,
+  NEON_SMAXV = NEONAcrossLanesFixed | 0x0000A000,
+  NEON_SMINV = NEONAcrossLanesFixed | 0x0001A000,
+  NEON_UMAXV = NEONAcrossLanesFixed | 0x2000A000,
+  NEON_UMINV = NEONAcrossLanesFixed | 0x2001A000,
+
+  // NEON floating point across instructions.
+  NEONAcrossLanesFPFixed = NEONAcrossLanesFixed | 0x0000C000,
+  NEONAcrossLanesFPFMask = NEONAcrossLanesFMask | 0x0000C000,
+  NEONAcrossLanesFPMask = NEONAcrossLanesMask | 0x00800000,
+
+  NEON_FMAXV = NEONAcrossLanesFPFixed | 0x2000F000,
+  NEON_FMINV = NEONAcrossLanesFPFixed | 0x2080F000,
+  NEON_FMAXNMV = NEONAcrossLanesFPFixed | 0x2000C000,
+  NEON_FMINNMV = NEONAcrossLanesFPFixed | 0x2080C000
+};
+
+// NEON instructions with indexed element operand.
+enum NEONByIndexedElementOp {
+  NEONByIndexedElementFixed = 0x0F000000,
+  NEONByIndexedElementFMask = 0x9F000400,
+  NEONByIndexedElementMask = 0xBF00F400,
+  NEON_MUL_byelement = NEONByIndexedElementFixed | 0x00008000,
+  NEON_MLA_byelement = NEONByIndexedElementFixed | 0x20000000,
+  NEON_MLS_byelement = NEONByIndexedElementFixed | 0x20004000,
+  NEON_SMULL_byelement = NEONByIndexedElementFixed | 0x0000A000,
+  NEON_SMLAL_byelement = NEONByIndexedElementFixed | 0x00002000,
+  NEON_SMLSL_byelement = NEONByIndexedElementFixed | 0x00006000,
+  NEON_UMULL_byelement = NEONByIndexedElementFixed | 0x2000A000,
+  NEON_UMLAL_byelement = NEONByIndexedElementFixed | 0x20002000,
+  NEON_UMLSL_byelement = NEONByIndexedElementFixed | 0x20006000,
+  NEON_SQDMULL_byelement = NEONByIndexedElementFixed | 0x0000B000,
+  NEON_SQDMLAL_byelement = NEONByIndexedElementFixed | 0x00003000,
+  NEON_SQDMLSL_byelement = NEONByIndexedElementFixed | 0x00007000,
+  NEON_SQDMULH_byelement = NEONByIndexedElementFixed | 0x0000C000,
+  NEON_SQRDMULH_byelement = NEONByIndexedElementFixed | 0x0000D000,
+
+  // Floating point instructions.
+  NEONByIndexedElementFPFixed = NEONByIndexedElementFixed | 0x00800000,
+  NEONByIndexedElementFPMask = NEONByIndexedElementMask | 0x00800000,
+  NEON_FMLA_byelement = NEONByIndexedElementFPFixed | 0x00001000,
+  NEON_FMLS_byelement = NEONByIndexedElementFPFixed | 0x00005000,
+  NEON_FMUL_byelement = NEONByIndexedElementFPFixed | 0x00009000,
+  NEON_FMULX_byelement = NEONByIndexedElementFPFixed | 0x20009000
+};
+
+// NEON modified immediate.
+enum NEONModifiedImmediateOp {
+  NEONModifiedImmediateFixed = 0x0F000400,
+  NEONModifiedImmediateFMask = 0x9FF80400,
+  NEONModifiedImmediateOpBit = 0x20000000,
+  NEONModifiedImmediate_MOVI = NEONModifiedImmediateFixed | 0x00000000,
+  NEONModifiedImmediate_MVNI = NEONModifiedImmediateFixed | 0x20000000,
+  NEONModifiedImmediate_ORR = NEONModifiedImmediateFixed | 0x00001000,
+  NEONModifiedImmediate_BIC = NEONModifiedImmediateFixed | 0x20001000
+};
+
+// NEON extract.
+enum NEONExtractOp {
+  NEONExtractFixed = 0x2E000000,
+  NEONExtractFMask = 0xBF208400,
+  NEONExtractMask = 0xBFE08400,
+  NEON_EXT = NEONExtractFixed | 0x00000000
+};
+
+enum NEONLoadStoreMultiOp {
+  NEONLoadStoreMultiL = 0x00400000,
+  NEONLoadStoreMulti1_1v = 0x00007000,
+  NEONLoadStoreMulti1_2v = 0x0000A000,
+  NEONLoadStoreMulti1_3v = 0x00006000,
+  NEONLoadStoreMulti1_4v = 0x00002000,
+  NEONLoadStoreMulti2 = 0x00008000,
+  NEONLoadStoreMulti3 = 0x00004000,
+  NEONLoadStoreMulti4 = 0x00000000
+};
+
+// NEON load/store multiple structures.
+enum NEONLoadStoreMultiStructOp {
+  NEONLoadStoreMultiStructFixed = 0x0C000000,
+  NEONLoadStoreMultiStructFMask = 0xBFBF0000,
+  NEONLoadStoreMultiStructMask = 0xBFFFF000,
+  NEONLoadStoreMultiStructStore = NEONLoadStoreMultiStructFixed,
+  NEONLoadStoreMultiStructLoad =
+      NEONLoadStoreMultiStructFixed | NEONLoadStoreMultiL,
+  NEON_LD1_1v = NEONLoadStoreMultiStructLoad | NEONLoadStoreMulti1_1v,
+  NEON_LD1_2v = NEONLoadStoreMultiStructLoad | NEONLoadStoreMulti1_2v,
+  NEON_LD1_3v = NEONLoadStoreMultiStructLoad | NEONLoadStoreMulti1_3v,
+  NEON_LD1_4v = NEONLoadStoreMultiStructLoad | NEONLoadStoreMulti1_4v,
+  NEON_LD2 = NEONLoadStoreMultiStructLoad | NEONLoadStoreMulti2,
+  NEON_LD3 = NEONLoadStoreMultiStructLoad | NEONLoadStoreMulti3,
+  NEON_LD4 = NEONLoadStoreMultiStructLoad | NEONLoadStoreMulti4,
+  NEON_ST1_1v = NEONLoadStoreMultiStructStore | NEONLoadStoreMulti1_1v,
+  NEON_ST1_2v = NEONLoadStoreMultiStructStore | NEONLoadStoreMulti1_2v,
+  NEON_ST1_3v = NEONLoadStoreMultiStructStore | NEONLoadStoreMulti1_3v,
+  NEON_ST1_4v = NEONLoadStoreMultiStructStore | NEONLoadStoreMulti1_4v,
+  NEON_ST2 = NEONLoadStoreMultiStructStore | NEONLoadStoreMulti2,
+  NEON_ST3 = NEONLoadStoreMultiStructStore | NEONLoadStoreMulti3,
+  NEON_ST4 = NEONLoadStoreMultiStructStore | NEONLoadStoreMulti4
+};
+
+// NEON load/store multiple structures with post-index addressing.
+enum NEONLoadStoreMultiStructPostIndexOp {
+  NEONLoadStoreMultiStructPostIndexFixed = 0x0C800000,
+  NEONLoadStoreMultiStructPostIndexFMask = 0xBFA00000,
+  NEONLoadStoreMultiStructPostIndexMask = 0xBFE0F000,
+  NEONLoadStoreMultiStructPostIndex = 0x00800000,
+  NEON_LD1_1v_post = NEON_LD1_1v | NEONLoadStoreMultiStructPostIndex,
+  NEON_LD1_2v_post = NEON_LD1_2v | NEONLoadStoreMultiStructPostIndex,
+  NEON_LD1_3v_post = NEON_LD1_3v | NEONLoadStoreMultiStructPostIndex,
+  NEON_LD1_4v_post = NEON_LD1_4v | NEONLoadStoreMultiStructPostIndex,
+  NEON_LD2_post = NEON_LD2 | NEONLoadStoreMultiStructPostIndex,
+  NEON_LD3_post = NEON_LD3 | NEONLoadStoreMultiStructPostIndex,
+  NEON_LD4_post = NEON_LD4 | NEONLoadStoreMultiStructPostIndex,
+  NEON_ST1_1v_post = NEON_ST1_1v | NEONLoadStoreMultiStructPostIndex,
+  NEON_ST1_2v_post = NEON_ST1_2v | NEONLoadStoreMultiStructPostIndex,
+  NEON_ST1_3v_post = NEON_ST1_3v | NEONLoadStoreMultiStructPostIndex,
+  NEON_ST1_4v_post = NEON_ST1_4v | NEONLoadStoreMultiStructPostIndex,
+  NEON_ST2_post = NEON_ST2 | NEONLoadStoreMultiStructPostIndex,
+  NEON_ST3_post = NEON_ST3 | NEONLoadStoreMultiStructPostIndex,
+  NEON_ST4_post = NEON_ST4 | NEONLoadStoreMultiStructPostIndex
+};
+
+enum NEONLoadStoreSingleOp {
+  NEONLoadStoreSingle1 = 0x00000000,
+  NEONLoadStoreSingle2 = 0x00200000,
+  NEONLoadStoreSingle3 = 0x00002000,
+  NEONLoadStoreSingle4 = 0x00202000,
+  NEONLoadStoreSingleL = 0x00400000,
+  NEONLoadStoreSingle_b = 0x00000000,
+  NEONLoadStoreSingle_h = 0x00004000,
+  NEONLoadStoreSingle_s = 0x00008000,
+  NEONLoadStoreSingle_d = 0x00008400,
+  NEONLoadStoreSingleAllLanes = 0x0000C000,
+  NEONLoadStoreSingleLenMask = 0x00202000
+};
+
+// NEON load/store single structure.
+enum NEONLoadStoreSingleStructOp {
+  NEONLoadStoreSingleStructFixed = 0x0D000000,
+  NEONLoadStoreSingleStructFMask = 0xBF9F0000,
+  NEONLoadStoreSingleStructMask = 0xBFFFE000,
+  NEONLoadStoreSingleStructStore = NEONLoadStoreSingleStructFixed,
+  NEONLoadStoreSingleStructLoad =
+      NEONLoadStoreSingleStructFixed | NEONLoadStoreSingleL,
+  NEONLoadStoreSingleStructLoad1 =
+      NEONLoadStoreSingle1 | NEONLoadStoreSingleStructLoad,
+  NEONLoadStoreSingleStructLoad2 =
+      NEONLoadStoreSingle2 | NEONLoadStoreSingleStructLoad,
+  NEONLoadStoreSingleStructLoad3 =
+      NEONLoadStoreSingle3 | NEONLoadStoreSingleStructLoad,
+  NEONLoadStoreSingleStructLoad4 =
+      NEONLoadStoreSingle4 | NEONLoadStoreSingleStructLoad,
+  NEONLoadStoreSingleStructStore1 =
+      NEONLoadStoreSingle1 | NEONLoadStoreSingleStructFixed,
+  NEONLoadStoreSingleStructStore2 =
+      NEONLoadStoreSingle2 | NEONLoadStoreSingleStructFixed,
+  NEONLoadStoreSingleStructStore3 =
+      NEONLoadStoreSingle3 | NEONLoadStoreSingleStructFixed,
+  NEONLoadStoreSingleStructStore4 =
+      NEONLoadStoreSingle4 | NEONLoadStoreSingleStructFixed,
+  NEON_LD1_b = NEONLoadStoreSingleStructLoad1 | NEONLoadStoreSingle_b,
+  NEON_LD1_h = NEONLoadStoreSingleStructLoad1 | NEONLoadStoreSingle_h,
+  NEON_LD1_s = NEONLoadStoreSingleStructLoad1 | NEONLoadStoreSingle_s,
+  NEON_LD1_d = NEONLoadStoreSingleStructLoad1 | NEONLoadStoreSingle_d,
+  NEON_LD1R = NEONLoadStoreSingleStructLoad1 | NEONLoadStoreSingleAllLanes,
+  NEON_ST1_b = NEONLoadStoreSingleStructStore1 | NEONLoadStoreSingle_b,
+  NEON_ST1_h = NEONLoadStoreSingleStructStore1 | NEONLoadStoreSingle_h,
+  NEON_ST1_s = NEONLoadStoreSingleStructStore1 | NEONLoadStoreSingle_s,
+  NEON_ST1_d = NEONLoadStoreSingleStructStore1 | NEONLoadStoreSingle_d,
+
+  NEON_LD2_b = NEONLoadStoreSingleStructLoad2 | NEONLoadStoreSingle_b,
+  NEON_LD2_h = NEONLoadStoreSingleStructLoad2 | NEONLoadStoreSingle_h,
+  NEON_LD2_s = NEONLoadStoreSingleStructLoad2 | NEONLoadStoreSingle_s,
+  NEON_LD2_d = NEONLoadStoreSingleStructLoad2 | NEONLoadStoreSingle_d,
+  NEON_LD2R = NEONLoadStoreSingleStructLoad2 | NEONLoadStoreSingleAllLanes,
+  NEON_ST2_b = NEONLoadStoreSingleStructStore2 | NEONLoadStoreSingle_b,
+  NEON_ST2_h = NEONLoadStoreSingleStructStore2 | NEONLoadStoreSingle_h,
+  NEON_ST2_s = NEONLoadStoreSingleStructStore2 | NEONLoadStoreSingle_s,
+  NEON_ST2_d = NEONLoadStoreSingleStructStore2 | NEONLoadStoreSingle_d,
+
+  NEON_LD3_b = NEONLoadStoreSingleStructLoad3 | NEONLoadStoreSingle_b,
+  NEON_LD3_h = NEONLoadStoreSingleStructLoad3 | NEONLoadStoreSingle_h,
+  NEON_LD3_s = NEONLoadStoreSingleStructLoad3 | NEONLoadStoreSingle_s,
+  NEON_LD3_d = NEONLoadStoreSingleStructLoad3 | NEONLoadStoreSingle_d,
+  NEON_LD3R = NEONLoadStoreSingleStructLoad3 | NEONLoadStoreSingleAllLanes,
+  NEON_ST3_b = NEONLoadStoreSingleStructStore3 | NEONLoadStoreSingle_b,
+  NEON_ST3_h = NEONLoadStoreSingleStructStore3 | NEONLoadStoreSingle_h,
+  NEON_ST3_s = NEONLoadStoreSingleStructStore3 | NEONLoadStoreSingle_s,
+  NEON_ST3_d = NEONLoadStoreSingleStructStore3 | NEONLoadStoreSingle_d,
+
+  NEON_LD4_b = NEONLoadStoreSingleStructLoad4 | NEONLoadStoreSingle_b,
+  NEON_LD4_h = NEONLoadStoreSingleStructLoad4 | NEONLoadStoreSingle_h,
+  NEON_LD4_s = NEONLoadStoreSingleStructLoad4 | NEONLoadStoreSingle_s,
+  NEON_LD4_d = NEONLoadStoreSingleStructLoad4 | NEONLoadStoreSingle_d,
+  NEON_LD4R = NEONLoadStoreSingleStructLoad4 | NEONLoadStoreSingleAllLanes,
+  NEON_ST4_b = NEONLoadStoreSingleStructStore4 | NEONLoadStoreSingle_b,
+  NEON_ST4_h = NEONLoadStoreSingleStructStore4 | NEONLoadStoreSingle_h,
+  NEON_ST4_s = NEONLoadStoreSingleStructStore4 | NEONLoadStoreSingle_s,
+  NEON_ST4_d = NEONLoadStoreSingleStructStore4 | NEONLoadStoreSingle_d
+};
+
+// NEON load/store single structure with post-index addressing.
+enum NEONLoadStoreSingleStructPostIndexOp {
+  NEONLoadStoreSingleStructPostIndexFixed = 0x0D800000,
+  NEONLoadStoreSingleStructPostIndexFMask = 0xBF800000,
+  NEONLoadStoreSingleStructPostIndexMask = 0xBFE0E000,
+  NEONLoadStoreSingleStructPostIndex = 0x00800000,
+  NEON_LD1_b_post = NEON_LD1_b | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD1_h_post = NEON_LD1_h | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD1_s_post = NEON_LD1_s | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD1_d_post = NEON_LD1_d | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD1R_post = NEON_LD1R | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST1_b_post = NEON_ST1_b | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST1_h_post = NEON_ST1_h | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST1_s_post = NEON_ST1_s | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST1_d_post = NEON_ST1_d | NEONLoadStoreSingleStructPostIndex,
+
+  NEON_LD2_b_post = NEON_LD2_b | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD2_h_post = NEON_LD2_h | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD2_s_post = NEON_LD2_s | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD2_d_post = NEON_LD2_d | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD2R_post = NEON_LD2R | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST2_b_post = NEON_ST2_b | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST2_h_post = NEON_ST2_h | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST2_s_post = NEON_ST2_s | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST2_d_post = NEON_ST2_d | NEONLoadStoreSingleStructPostIndex,
+
+  NEON_LD3_b_post = NEON_LD3_b | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD3_h_post = NEON_LD3_h | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD3_s_post = NEON_LD3_s | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD3_d_post = NEON_LD3_d | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD3R_post = NEON_LD3R | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST3_b_post = NEON_ST3_b | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST3_h_post = NEON_ST3_h | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST3_s_post = NEON_ST3_s | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST3_d_post = NEON_ST3_d | NEONLoadStoreSingleStructPostIndex,
+
+  NEON_LD4_b_post = NEON_LD4_b | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD4_h_post = NEON_LD4_h | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD4_s_post = NEON_LD4_s | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD4_d_post = NEON_LD4_d | NEONLoadStoreSingleStructPostIndex,
+  NEON_LD4R_post = NEON_LD4R | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST4_b_post = NEON_ST4_b | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST4_h_post = NEON_ST4_h | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST4_s_post = NEON_ST4_s | NEONLoadStoreSingleStructPostIndex,
+  NEON_ST4_d_post = NEON_ST4_d | NEONLoadStoreSingleStructPostIndex
+};
+
+// NEON register copy.
+enum NEONCopyOp {
+  NEONCopyFixed = 0x0E000400,
+  NEONCopyFMask = 0x9FE08400,
+  NEONCopyMask = 0x3FE08400,
+  NEONCopyInsElementMask = NEONCopyMask | 0x40000000,
+  NEONCopyInsGeneralMask = NEONCopyMask | 0x40007800,
+  NEONCopyDupElementMask = NEONCopyMask | 0x20007800,
+  NEONCopyDupGeneralMask = NEONCopyDupElementMask,
+  NEONCopyUmovMask = NEONCopyMask | 0x20007800,
+  NEONCopySmovMask = NEONCopyMask | 0x20007800,
+  NEON_INS_ELEMENT = NEONCopyFixed | 0x60000000,
+  NEON_INS_GENERAL = NEONCopyFixed | 0x40001800,
+  NEON_DUP_ELEMENT = NEONCopyFixed | 0x00000000,
+  NEON_DUP_GENERAL = NEONCopyFixed | 0x00000800,
+  NEON_SMOV = NEONCopyFixed | 0x00002800,
+  NEON_UMOV = NEONCopyFixed | 0x00003800
+};
+
+// NEON scalar instructions with indexed element operand.
+enum NEONScalarByIndexedElementOp {
+  NEONScalarByIndexedElementFixed = 0x5F000000,
+  NEONScalarByIndexedElementFMask = 0xDF000400,
+  NEONScalarByIndexedElementMask = 0xFF00F400,
+  NEON_SQDMLAL_byelement_scalar = NEON_Q | NEONScalar | NEON_SQDMLAL_byelement,
+  NEON_SQDMLSL_byelement_scalar = NEON_Q | NEONScalar | NEON_SQDMLSL_byelement,
+  NEON_SQDMULL_byelement_scalar = NEON_Q | NEONScalar | NEON_SQDMULL_byelement,
+  NEON_SQDMULH_byelement_scalar = NEON_Q | NEONScalar | NEON_SQDMULH_byelement,
+  NEON_SQRDMULH_byelement_scalar =
+      NEON_Q | NEONScalar | NEON_SQRDMULH_byelement,
+
+  // Floating point instructions.
+  NEONScalarByIndexedElementFPFixed =
+      NEONScalarByIndexedElementFixed | 0x00800000,
+  NEONScalarByIndexedElementFPMask =
+      NEONScalarByIndexedElementMask | 0x00800000,
+  NEON_FMLA_byelement_scalar = NEON_Q | NEONScalar | NEON_FMLA_byelement,
+  NEON_FMLS_byelement_scalar = NEON_Q | NEONScalar | NEON_FMLS_byelement,
+  NEON_FMUL_byelement_scalar = NEON_Q | NEONScalar | NEON_FMUL_byelement,
+  NEON_FMULX_byelement_scalar = NEON_Q | NEONScalar | NEON_FMULX_byelement
+};
+
+// NEON shift immediate.
+enum NEONShiftImmediateOp {
+  NEONShiftImmediateFixed = 0x0F000400,
+  NEONShiftImmediateFMask = 0x9F800400,
+  NEONShiftImmediateMask = 0xBF80FC00,
+  NEONShiftImmediateUBit = 0x20000000,
+  NEON_SHL = NEONShiftImmediateFixed | 0x00005000,
+  NEON_SSHLL = NEONShiftImmediateFixed | 0x0000A000,
+  NEON_USHLL = NEONShiftImmediateFixed | 0x2000A000,
+  NEON_SLI = NEONShiftImmediateFixed | 0x20005000,
+  NEON_SRI = NEONShiftImmediateFixed | 0x20004000,
+  NEON_SHRN = NEONShiftImmediateFixed | 0x00008000,
+  NEON_RSHRN = NEONShiftImmediateFixed | 0x00008800,
+  NEON_UQSHRN = NEONShiftImmediateFixed | 0x20009000,
+  NEON_UQRSHRN = NEONShiftImmediateFixed | 0x20009800,
+  NEON_SQSHRN = NEONShiftImmediateFixed | 0x00009000,
+  NEON_SQRSHRN = NEONShiftImmediateFixed | 0x00009800,
+  NEON_SQSHRUN = NEONShiftImmediateFixed | 0x20008000,
+  NEON_SQRSHRUN = NEONShiftImmediateFixed | 0x20008800,
+  NEON_SSHR = NEONShiftImmediateFixed | 0x00000000,
+  NEON_SRSHR = NEONShiftImmediateFixed | 0x00002000,
+  NEON_USHR = NEONShiftImmediateFixed | 0x20000000,
+  NEON_URSHR = NEONShiftImmediateFixed | 0x20002000,
+  NEON_SSRA = NEONShiftImmediateFixed | 0x00001000,
+  NEON_SRSRA = NEONShiftImmediateFixed | 0x00003000,
+  NEON_USRA = NEONShiftImmediateFixed | 0x20001000,
+  NEON_URSRA = NEONShiftImmediateFixed | 0x20003000,
+  NEON_SQSHLU = NEONShiftImmediateFixed | 0x20006000,
+  NEON_SCVTF_imm = NEONShiftImmediateFixed | 0x0000E000,
+  NEON_UCVTF_imm = NEONShiftImmediateFixed | 0x2000E000,
+  NEON_FCVTZS_imm = NEONShiftImmediateFixed | 0x0000F800,
+  NEON_FCVTZU_imm = NEONShiftImmediateFixed | 0x2000F800,
+  NEON_SQSHL_imm = NEONShiftImmediateFixed | 0x00007000,
+  NEON_UQSHL_imm = NEONShiftImmediateFixed | 0x20007000
+};
+
+// NEON scalar register copy.
+enum NEONScalarCopyOp {
+  NEONScalarCopyFixed = 0x5E000400,
+  NEONScalarCopyFMask = 0xDFE08400,
+  NEONScalarCopyMask = 0xFFE0FC00,
+  NEON_DUP_ELEMENT_scalar = NEON_Q | NEONScalar | NEON_DUP_ELEMENT
+};
+
+// NEON scalar pairwise instructions.
+enum NEONScalarPairwiseOp {
+  NEONScalarPairwiseFixed = 0x5E300800,
+  NEONScalarPairwiseFMask = 0xDF3E0C00,
+  NEONScalarPairwiseMask = 0xFFB1F800,
+  NEON_ADDP_scalar = NEONScalarPairwiseFixed | 0x0081B000,
+  NEON_FMAXNMP_scalar = NEONScalarPairwiseFixed | 0x2000C000,
+  NEON_FMINNMP_scalar = NEONScalarPairwiseFixed | 0x2080C000,
+  NEON_FADDP_scalar = NEONScalarPairwiseFixed | 0x2000D000,
+  NEON_FMAXP_scalar = NEONScalarPairwiseFixed | 0x2000F000,
+  NEON_FMINP_scalar = NEONScalarPairwiseFixed | 0x2080F000
+};
+
+// NEON scalar shift immediate.
+enum NEONScalarShiftImmediateOp {
+  NEONScalarShiftImmediateFixed = 0x5F000400,
+  NEONScalarShiftImmediateFMask = 0xDF800400,
+  NEONScalarShiftImmediateMask = 0xFF80FC00,
+  NEON_SHL_scalar = NEON_Q | NEONScalar | NEON_SHL,
+  NEON_SLI_scalar = NEON_Q | NEONScalar | NEON_SLI,
+  NEON_SRI_scalar = NEON_Q | NEONScalar | NEON_SRI,
+  NEON_SSHR_scalar = NEON_Q | NEONScalar | NEON_SSHR,
+  NEON_USHR_scalar = NEON_Q | NEONScalar | NEON_USHR,
+  NEON_SRSHR_scalar = NEON_Q | NEONScalar | NEON_SRSHR,
+  NEON_URSHR_scalar = NEON_Q | NEONScalar | NEON_URSHR,
+  NEON_SSRA_scalar = NEON_Q | NEONScalar | NEON_SSRA,
+  NEON_USRA_scalar = NEON_Q | NEONScalar | NEON_USRA,
+  NEON_SRSRA_scalar = NEON_Q | NEONScalar | NEON_SRSRA,
+  NEON_URSRA_scalar = NEON_Q | NEONScalar | NEON_URSRA,
+  NEON_UQSHRN_scalar = NEON_Q | NEONScalar | NEON_UQSHRN,
+  NEON_UQRSHRN_scalar = NEON_Q | NEONScalar | NEON_UQRSHRN,
+  NEON_SQSHRN_scalar = NEON_Q | NEONScalar | NEON_SQSHRN,
+  NEON_SQRSHRN_scalar = NEON_Q | NEONScalar | NEON_SQRSHRN,
+  NEON_SQSHRUN_scalar = NEON_Q | NEONScalar | NEON_SQSHRUN,
+  NEON_SQRSHRUN_scalar = NEON_Q | NEONScalar | NEON_SQRSHRUN,
+  NEON_SQSHLU_scalar = NEON_Q | NEONScalar | NEON_SQSHLU,
+  NEON_SQSHL_imm_scalar = NEON_Q | NEONScalar | NEON_SQSHL_imm,
+  NEON_UQSHL_imm_scalar = NEON_Q | NEONScalar | NEON_UQSHL_imm,
+  NEON_SCVTF_imm_scalar = NEON_Q | NEONScalar | NEON_SCVTF_imm,
+  NEON_UCVTF_imm_scalar = NEON_Q | NEONScalar | NEON_UCVTF_imm,
+  NEON_FCVTZS_imm_scalar = NEON_Q | NEONScalar | NEON_FCVTZS_imm,
+  NEON_FCVTZU_imm_scalar = NEON_Q | NEONScalar | NEON_FCVTZU_imm
+};
+
+// NEON table.
+enum NEONTableOp {
+  NEONTableFixed = 0x0E000000,
+  NEONTableFMask = 0xBF208C00,
+  NEONTableExt = 0x00001000,
+  NEONTableMask = 0xBF20FC00,
+  NEON_TBL_1v = NEONTableFixed | 0x00000000,
+  NEON_TBL_2v = NEONTableFixed | 0x00002000,
+  NEON_TBL_3v = NEONTableFixed | 0x00004000,
+  NEON_TBL_4v = NEONTableFixed | 0x00006000,
+  NEON_TBX_1v = NEON_TBL_1v | NEONTableExt,
+  NEON_TBX_2v = NEON_TBL_2v | NEONTableExt,
+  NEON_TBX_3v = NEON_TBL_3v | NEONTableExt,
+  NEON_TBX_4v = NEON_TBL_4v | NEONTableExt
+};
+
+// NEON perm.
+enum NEONPermOp {
+  NEONPermFixed = 0x0E000800,
+  NEONPermFMask = 0xBF208C00,
+  NEONPermMask = 0x3F20FC00,
+  NEON_UZP1 = NEONPermFixed | 0x00001000,
+  NEON_TRN1 = NEONPermFixed | 0x00002000,
+  NEON_ZIP1 = NEONPermFixed | 0x00003000,
+  NEON_UZP2 = NEONPermFixed | 0x00005000,
+  NEON_TRN2 = NEONPermFixed | 0x00006000,
+  NEON_ZIP2 = NEONPermFixed | 0x00007000
+};
+
+// NEON scalar instructions with two register operands.
+enum NEONScalar2RegMiscOp {
+  NEONScalar2RegMiscFixed = 0x5E200800,
+  NEONScalar2RegMiscFMask = 0xDF3E0C00,
+  NEONScalar2RegMiscMask = NEON_Q | NEONScalar | NEON2RegMiscMask,
+  NEON_CMGT_zero_scalar = NEON_Q | NEONScalar | NEON_CMGT_zero,
+  NEON_CMEQ_zero_scalar = NEON_Q | NEONScalar | NEON_CMEQ_zero,
+  NEON_CMLT_zero_scalar = NEON_Q | NEONScalar | NEON_CMLT_zero,
+  NEON_CMGE_zero_scalar = NEON_Q | NEONScalar | NEON_CMGE_zero,
+  NEON_CMLE_zero_scalar = NEON_Q | NEONScalar | NEON_CMLE_zero,
+  NEON_ABS_scalar = NEON_Q | NEONScalar | NEON_ABS,
+  NEON_SQABS_scalar = NEON_Q | NEONScalar | NEON_SQABS,
+  NEON_NEG_scalar = NEON_Q | NEONScalar | NEON_NEG,
+  NEON_SQNEG_scalar = NEON_Q | NEONScalar | NEON_SQNEG,
+  NEON_SQXTN_scalar = NEON_Q | NEONScalar | NEON_SQXTN,
+  NEON_UQXTN_scalar = NEON_Q | NEONScalar | NEON_UQXTN,
+  NEON_SQXTUN_scalar = NEON_Q | NEONScalar | NEON_SQXTUN,
+  NEON_SUQADD_scalar = NEON_Q | NEONScalar | NEON_SUQADD,
+  NEON_USQADD_scalar = NEON_Q | NEONScalar | NEON_USQADD,
+
+  NEONScalar2RegMiscOpcode = NEON2RegMiscOpcode,
+  NEON_NEG_scalar_opcode = NEON_NEG_scalar & NEONScalar2RegMiscOpcode,
+
+  NEONScalar2RegMiscFPMask = NEONScalar2RegMiscMask | 0x00800000,
+  NEON_FRSQRTE_scalar = NEON_Q | NEONScalar | NEON_FRSQRTE,
+  NEON_FRECPE_scalar = NEON_Q | NEONScalar | NEON_FRECPE,
+  NEON_SCVTF_scalar = NEON_Q | NEONScalar | NEON_SCVTF,
+  NEON_UCVTF_scalar = NEON_Q | NEONScalar | NEON_UCVTF,
+  NEON_FCMGT_zero_scalar = NEON_Q | NEONScalar | NEON_FCMGT_zero,
+  NEON_FCMEQ_zero_scalar = NEON_Q | NEONScalar | NEON_FCMEQ_zero,
+  NEON_FCMLT_zero_scalar = NEON_Q | NEONScalar | NEON_FCMLT_zero,
+  NEON_FCMGE_zero_scalar = NEON_Q | NEONScalar | NEON_FCMGE_zero,
+  NEON_FCMLE_zero_scalar = NEON_Q | NEONScalar | NEON_FCMLE_zero,
+  NEON_FRECPX_scalar = NEONScalar2RegMiscFixed | 0x0081F000,
+  NEON_FCVTNS_scalar = NEON_Q | NEONScalar | NEON_FCVTNS,
+  NEON_FCVTNU_scalar = NEON_Q | NEONScalar | NEON_FCVTNU,
+  NEON_FCVTPS_scalar = NEON_Q | NEONScalar | NEON_FCVTPS,
+  NEON_FCVTPU_scalar = NEON_Q | NEONScalar | NEON_FCVTPU,
+  NEON_FCVTMS_scalar = NEON_Q | NEONScalar | NEON_FCVTMS,
+  NEON_FCVTMU_scalar = NEON_Q | NEONScalar | NEON_FCVTMU,
+  NEON_FCVTZS_scalar = NEON_Q | NEONScalar | NEON_FCVTZS,
+  NEON_FCVTZU_scalar = NEON_Q | NEONScalar | NEON_FCVTZU,
+  NEON_FCVTAS_scalar = NEON_Q | NEONScalar | NEON_FCVTAS,
+  NEON_FCVTAU_scalar = NEON_Q | NEONScalar | NEON_FCVTAU,
+  NEON_FCVTXN_scalar = NEON_Q | NEONScalar | NEON_FCVTXN
+};
+
+// NEON scalar instructions with three same-type operands.
+enum NEONScalar3SameOp {
+  NEONScalar3SameFixed = 0x5E200400,
+  NEONScalar3SameFMask = 0xDF200400,
+  NEONScalar3SameMask = 0xFF20FC00,
+  NEON_ADD_scalar = NEON_Q | NEONScalar | NEON_ADD,
+  NEON_CMEQ_scalar = NEON_Q | NEONScalar | NEON_CMEQ,
+  NEON_CMGE_scalar = NEON_Q | NEONScalar | NEON_CMGE,
+  NEON_CMGT_scalar = NEON_Q | NEONScalar | NEON_CMGT,
+  NEON_CMHI_scalar = NEON_Q | NEONScalar | NEON_CMHI,
+  NEON_CMHS_scalar = NEON_Q | NEONScalar | NEON_CMHS,
+  NEON_CMTST_scalar = NEON_Q | NEONScalar | NEON_CMTST,
+  NEON_SUB_scalar = NEON_Q | NEONScalar | NEON_SUB,
+  NEON_UQADD_scalar = NEON_Q | NEONScalar | NEON_UQADD,
+  NEON_SQADD_scalar = NEON_Q | NEONScalar | NEON_SQADD,
+  NEON_UQSUB_scalar = NEON_Q | NEONScalar | NEON_UQSUB,
+  NEON_SQSUB_scalar = NEON_Q | NEONScalar | NEON_SQSUB,
+  NEON_USHL_scalar = NEON_Q | NEONScalar | NEON_USHL,
+  NEON_SSHL_scalar = NEON_Q | NEONScalar | NEON_SSHL,
+  NEON_UQSHL_scalar = NEON_Q | NEONScalar | NEON_UQSHL,
+  NEON_SQSHL_scalar = NEON_Q | NEONScalar | NEON_SQSHL,
+  NEON_URSHL_scalar = NEON_Q | NEONScalar | NEON_URSHL,
+  NEON_SRSHL_scalar = NEON_Q | NEONScalar | NEON_SRSHL,
+  NEON_UQRSHL_scalar = NEON_Q | NEONScalar | NEON_UQRSHL,
+  NEON_SQRSHL_scalar = NEON_Q | NEONScalar | NEON_SQRSHL,
+  NEON_SQDMULH_scalar = NEON_Q | NEONScalar | NEON_SQDMULH,
+  NEON_SQRDMULH_scalar = NEON_Q | NEONScalar | NEON_SQRDMULH,
+
+  // NEON floating point scalar instructions with three same-type operands.
+  NEONScalar3SameFPFixed = NEONScalar3SameFixed | 0x0000C000,
+  NEONScalar3SameFPFMask = NEONScalar3SameFMask | 0x0000C000,
+  NEONScalar3SameFPMask = NEONScalar3SameMask | 0x00800000,
+  NEON_FACGE_scalar = NEON_Q | NEONScalar | NEON_FACGE,
+  NEON_FACGT_scalar = NEON_Q | NEONScalar | NEON_FACGT,
+  NEON_FCMEQ_scalar = NEON_Q | NEONScalar | NEON_FCMEQ,
+  NEON_FCMGE_scalar = NEON_Q | NEONScalar | NEON_FCMGE,
+  NEON_FCMGT_scalar = NEON_Q | NEONScalar | NEON_FCMGT,
+  NEON_FMULX_scalar = NEON_Q | NEONScalar | NEON_FMULX,
+  NEON_FRECPS_scalar = NEON_Q | NEONScalar | NEON_FRECPS,
+  NEON_FRSQRTS_scalar = NEON_Q | NEONScalar | NEON_FRSQRTS,
+  NEON_FABD_scalar = NEON_Q | NEONScalar | NEON_FABD
+};
+
+// NEON scalar instructions with three different-type operands.
+enum NEONScalar3DiffOp {
+  NEONScalar3DiffFixed = 0x5E200000,
+  NEONScalar3DiffFMask = 0xDF200C00,
+  NEONScalar3DiffMask = NEON_Q | NEONScalar | NEON3DifferentMask,
+  NEON_SQDMLAL_scalar = NEON_Q | NEONScalar | NEON_SQDMLAL,
+  NEON_SQDMLSL_scalar = NEON_Q | NEONScalar | NEON_SQDMLSL,
+  NEON_SQDMULL_scalar = NEON_Q | NEONScalar | NEON_SQDMULL
+};
+
 // Unimplemented and unallocated instructions. These are defined to make fixed
 // bit assertion easier.
 enum UnimplementedOp {