[V8] Implement SIMD Boolean vector types to allow mask registers.

src/machine-type.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_MACHINE_TYPE_H_
 #define V8_MACHINE_TYPE_H_
 
 #include <iosfwd>
 
 #include "src/base/bits.h"
@@ skipping 11 matching lines @@
   kWord16,
   kWord32,
   kWord64,
   kTaggedSigned,
   kTaggedPointer,
   kTagged,
   // FP representations must be last, and in order of increasing size.
   kFloat32,
   kFloat64,
   kSimd128,
+  kSimdBool4,  // SIMD boolean vector types.
+  kSimdBool8,
+  kSimdBool16,
   kFirstFPRepresentation = kFloat32,
-  kLastRepresentation = kSimd128
+  kLastRepresentation = kSimdBool16
 };
 
 static_assert(static_cast<int>(MachineRepresentation::kLastRepresentation) <
                   kIntSize * kBitsPerByte,
               "Bit masks of MachineRepresentation should fit in an int");
 
 const char* MachineReprToString(MachineRepresentation);
 
 enum class MachineSemantic {
   kNone,
@@ skipping 76 matching lines @@
     return MachineType(MachineRepresentation::kFloat32,
                        MachineSemantic::kNumber);
   }
   static MachineType Float64() {
     return MachineType(MachineRepresentation::kFloat64,
                        MachineSemantic::kNumber);
   }
   static MachineType Simd128() {
     return MachineType(MachineRepresentation::kSimd128, MachineSemantic::kNone);
   }
+  static MachineType SimdBool4() {
+    return MachineType(MachineRepresentation::kSimdBool4,
+                       MachineSemantic::kNone);
+  }
+  static MachineType SimdBool8() {
+    return MachineType(MachineRepresentation::kSimdBool8,
+                       MachineSemantic::kNone);
+  }
+  static MachineType SimdBool16() {
+    return MachineType(MachineRepresentation::kSimdBool16,
+                       MachineSemantic::kNone);
+  }
   static MachineType Pointer() {
     return MachineType(PointerRepresentation(), MachineSemantic::kNone);
   }
   static MachineType TaggedPointer() {
     return MachineType(MachineRepresentation::kTaggedPointer,
                        MachineSemantic::kAny);
   }
   static MachineType TaggedSigned() {
     return MachineType(MachineRepresentation::kTaggedSigned,
                        MachineSemantic::kInt32);
@@ skipping 26 matching lines @@
   }
   static MachineType RepFloat32() {
     return MachineType(MachineRepresentation::kFloat32, MachineSemantic::kNone);
   }
   static MachineType RepFloat64() {
     return MachineType(MachineRepresentation::kFloat64, MachineSemantic::kNone);
   }
   static MachineType RepSimd128() {
     return MachineType(MachineRepresentation::kSimd128, MachineSemantic::kNone);
   }
+  static MachineType RepSimdBool4() {
+    return MachineType(MachineRepresentation::kSimdBool4,
+                       MachineSemantic::kNone);
+  }
+  static MachineType RepSimdBool8() {
+    return MachineType(MachineRepresentation::kSimdBool8,
+                       MachineSemantic::kNone);
+  }
+  static MachineType RepSimdBool16() {
+    return MachineType(MachineRepresentation::kSimdBool16,
+                       MachineSemantic::kNone);
+  }
   static MachineType RepTagged() {
     return MachineType(MachineRepresentation::kTagged, MachineSemantic::kNone);
   }
   static MachineType RepBit() {
     return MachineType(MachineRepresentation::kBit, MachineSemantic::kNone);
   }
 
   static MachineType TypeForRepresentation(const MachineRepresentation& rep,
                                            bool isSigned = true) {
     switch (rep) {
       case MachineRepresentation::kNone:
         return MachineType::None();
       case MachineRepresentation::kBit:
         return MachineType::Bool();
       case MachineRepresentation::kWord8:
         return isSigned ? MachineType::Int8() : MachineType::Uint8();
       case MachineRepresentation::kWord16:
         return isSigned ? MachineType::Int16() : MachineType::Uint16();
       case MachineRepresentation::kWord32:
         return isSigned ? MachineType::Int32() : MachineType::Uint32();
       case MachineRepresentation::kWord64:
         return isSigned ? MachineType::Int64() : MachineType::Uint64();
       case MachineRepresentation::kFloat32:
         return MachineType::Float32();
       case MachineRepresentation::kFloat64:
         return MachineType::Float64();
       case MachineRepresentation::kSimd128:
         return MachineType::Simd128();
+      case MachineRepresentation::kSimdBool4:
+        return MachineType::SimdBool4();
+      case MachineRepresentation::kSimdBool8:
+        return MachineType::SimdBool8();
+      case MachineRepresentation::kSimdBool16:
+        return MachineType::SimdBool16();
       case MachineRepresentation::kTagged:
         return MachineType::AnyTagged();
       case MachineRepresentation::kTaggedSigned:
         return MachineType::TaggedSigned();
       case MachineRepresentation::kTaggedPointer:
         return MachineType::TaggedPointer();
       default:
         UNREACHABLE();
         return MachineType::None();
     }
@@ skipping 62 matching lines @@
   UNREACHABLE();
   return -1;
 }
 
 typedef Signature<MachineType> MachineSignature;
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MACHINE_TYPE_H_