Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_MACHINE_TYPE_H_ |
| 6 | #define V8_MACHINE_TYPE_H_ |
| 7 | |
| 8 | #include <iosfwd> |
| 9 | |
| 10 | #include "src/base/bits.h" |
| 11 | #include "src/globals.h" |
| 12 | #include "src/signature.h" |
| 13 | #include "src/zone.h" |
| 14 | |
| 15 | namespace v8 { |
| 16 | namespace internal { |
| 17 | |
| 18 | enum class MachineRepresentation : uint8_t { |
| 19 | kNone, |
| 20 | kBit, |
| 21 | kWord8, |
| 22 | kWord16, |
| 23 | kWord32, |
| 24 | kWord64, |
| 25 | kFloat32, |
| 26 | kFloat64, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 27 | kSimd128, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 28 | kTagged |
| 29 | }; |
| 30 | |
| 31 | enum class MachineSemantic : uint8_t { |
| 32 | kNone, |
| 33 | kBool, |
| 34 | kInt32, |
| 35 | kUint32, |
| 36 | kInt64, |
| 37 | kUint64, |
| 38 | kNumber, |
| 39 | kAny |
| 40 | }; |
| 41 | |
| 42 | class MachineType { |
| 43 | public: |
| 44 | MachineType() |
| 45 | : representation_(MachineRepresentation::kNone), |
| 46 | semantic_(MachineSemantic::kNone) {} |
| 47 | MachineType(MachineRepresentation representation, MachineSemantic semantic) |
| 48 | : representation_(representation), semantic_(semantic) {} |
| 49 | |
| 50 | bool operator==(MachineType other) const { |
| 51 | return representation() == other.representation() && |
| 52 | semantic() == other.semantic(); |
| 53 | } |
| 54 | |
| 55 | bool operator!=(MachineType other) const { return !(*this == other); } |
| 56 | |
| 57 | |
| 58 | MachineRepresentation representation() const { return representation_; } |
| 59 | MachineSemantic semantic() const { return semantic_; } |
| 60 | |
| 61 | bool IsSigned() { |
| 62 | return semantic() == MachineSemantic::kInt32 || |
| 63 | semantic() == MachineSemantic::kInt64; |
| 64 | } |
| 65 | bool IsUnsigned() { |
| 66 | return semantic() == MachineSemantic::kUint32 || |
| 67 | semantic() == MachineSemantic::kUint64; |
| 68 | } |
| 69 | |
| 70 | static MachineRepresentation PointerRepresentation() { |
| 71 | return (kPointerSize == 4) ? MachineRepresentation::kWord32 |
| 72 | : MachineRepresentation::kWord64; |
| 73 | } |
| 74 | static MachineType Pointer() { |
| 75 | return MachineType(PointerRepresentation(), MachineSemantic::kNone); |
| 76 | } |
| 77 | static MachineType IntPtr() { |
| 78 | return (kPointerSize == 4) ? Int32() : Int64(); |
| 79 | } |
| 80 | static MachineType Float32() { |
| 81 | return MachineType(MachineRepresentation::kFloat32, |
| 82 | MachineSemantic::kNumber); |
| 83 | } |
| 84 | static MachineType Float64() { |
| 85 | return MachineType(MachineRepresentation::kFloat64, |
| 86 | MachineSemantic::kNumber); |
| 87 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 88 | static MachineType Simd128() { |
| 89 | return MachineType(MachineRepresentation::kSimd128, MachineSemantic::kNone); |
| 90 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 91 | static MachineType Int8() { |
| 92 | return MachineType(MachineRepresentation::kWord8, MachineSemantic::kInt32); |
| 93 | } |
| 94 | static MachineType Uint8() { |
| 95 | return MachineType(MachineRepresentation::kWord8, MachineSemantic::kUint32); |
| 96 | } |
| 97 | static MachineType Int16() { |
| 98 | return MachineType(MachineRepresentation::kWord16, MachineSemantic::kInt32); |
| 99 | } |
| 100 | static MachineType Uint16() { |
| 101 | return MachineType(MachineRepresentation::kWord16, |
| 102 | MachineSemantic::kUint32); |
| 103 | } |
| 104 | static MachineType Int32() { |
| 105 | return MachineType(MachineRepresentation::kWord32, MachineSemantic::kInt32); |
| 106 | } |
| 107 | static MachineType Uint32() { |
| 108 | return MachineType(MachineRepresentation::kWord32, |
| 109 | MachineSemantic::kUint32); |
| 110 | } |
| 111 | static MachineType Int64() { |
| 112 | return MachineType(MachineRepresentation::kWord64, MachineSemantic::kInt64); |
| 113 | } |
| 114 | static MachineType Uint64() { |
| 115 | return MachineType(MachineRepresentation::kWord64, |
| 116 | MachineSemantic::kUint64); |
| 117 | } |
| 118 | static MachineType AnyTagged() { |
| 119 | return MachineType(MachineRepresentation::kTagged, MachineSemantic::kAny); |
| 120 | } |
| 121 | static MachineType Bool() { |
| 122 | return MachineType(MachineRepresentation::kBit, MachineSemantic::kBool); |
| 123 | } |
| 124 | static MachineType TaggedBool() { |
| 125 | return MachineType(MachineRepresentation::kTagged, MachineSemantic::kBool); |
| 126 | } |
| 127 | static MachineType None() { |
| 128 | return MachineType(MachineRepresentation::kNone, MachineSemantic::kNone); |
| 129 | } |
| 130 | |
| 131 | // These naked representations should eventually go away. |
| 132 | static MachineType RepWord8() { |
| 133 | return MachineType(MachineRepresentation::kWord8, MachineSemantic::kNone); |
| 134 | } |
| 135 | static MachineType RepWord16() { |
| 136 | return MachineType(MachineRepresentation::kWord16, MachineSemantic::kNone); |
| 137 | } |
| 138 | static MachineType RepWord32() { |
| 139 | return MachineType(MachineRepresentation::kWord32, MachineSemantic::kNone); |
| 140 | } |
| 141 | static MachineType RepWord64() { |
| 142 | return MachineType(MachineRepresentation::kWord64, MachineSemantic::kNone); |
| 143 | } |
| 144 | static MachineType RepFloat32() { |
| 145 | return MachineType(MachineRepresentation::kFloat32, MachineSemantic::kNone); |
| 146 | } |
| 147 | static MachineType RepFloat64() { |
| 148 | return MachineType(MachineRepresentation::kFloat64, MachineSemantic::kNone); |
| 149 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 150 | static MachineType RepSimd128() { |
| 151 | return MachineType(MachineRepresentation::kSimd128, MachineSemantic::kNone); |
| 152 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 153 | static MachineType RepTagged() { |
| 154 | return MachineType(MachineRepresentation::kTagged, MachineSemantic::kNone); |
| 155 | } |
| 156 | static MachineType RepBit() { |
| 157 | return MachineType(MachineRepresentation::kBit, MachineSemantic::kNone); |
| 158 | } |
| 159 | |
| 160 | private: |
| 161 | MachineRepresentation representation_; |
| 162 | MachineSemantic semantic_; |
| 163 | }; |
| 164 | |
| 165 | V8_INLINE size_t hash_value(MachineRepresentation rep) { |
| 166 | return static_cast<size_t>(rep); |
| 167 | } |
| 168 | |
| 169 | V8_INLINE size_t hash_value(MachineType type) { |
| 170 | return static_cast<size_t>(type.representation()) + |
| 171 | static_cast<size_t>(type.semantic()) * 16; |
| 172 | } |
| 173 | |
| 174 | std::ostream& operator<<(std::ostream& os, MachineRepresentation rep); |
| 175 | std::ostream& operator<<(std::ostream& os, MachineSemantic type); |
| 176 | std::ostream& operator<<(std::ostream& os, MachineType type); |
| 177 | |
| 178 | inline bool IsFloatingPoint(MachineRepresentation rep) { |
| 179 | return rep == MachineRepresentation::kFloat32 || |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 180 | rep == MachineRepresentation::kFloat64 || |
| 181 | rep == MachineRepresentation::kSimd128; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | // Gets the log2 of the element size in bytes of the machine type. |
| 185 | inline int ElementSizeLog2Of(MachineRepresentation rep) { |
| 186 | switch (rep) { |
| 187 | case MachineRepresentation::kBit: |
| 188 | case MachineRepresentation::kWord8: |
| 189 | return 0; |
| 190 | case MachineRepresentation::kWord16: |
| 191 | return 1; |
| 192 | case MachineRepresentation::kWord32: |
| 193 | case MachineRepresentation::kFloat32: |
| 194 | return 2; |
| 195 | case MachineRepresentation::kWord64: |
| 196 | case MachineRepresentation::kFloat64: |
| 197 | return 3; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 198 | case MachineRepresentation::kSimd128: |
| 199 | return 4; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 200 | case MachineRepresentation::kTagged: |
| 201 | return kPointerSizeLog2; |
| 202 | default: |
| 203 | break; |
| 204 | } |
| 205 | UNREACHABLE(); |
| 206 | return -1; |
| 207 | } |
| 208 | |
| 209 | typedef Signature<MachineType> MachineSignature; |
| 210 | |
| 211 | } // namespace internal |
| 212 | } // namespace v8 |
| 213 | |
| 214 | #endif // V8_MACHINE_TYPE_H_ |