Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +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_COMPILER_C_SIGNATURE_H_ |
| 6 | #define V8_COMPILER_C_SIGNATURE_H_ |
| 7 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 8 | #include "src/machine-type.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | namespace compiler { |
| 13 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 14 | #define FOREACH_CTYPE_MACHINE_TYPE_MAPPING(V) \ |
| 15 | V(void, MachineType::None()) \ |
| 16 | V(bool, MachineType::Uint8()) \ |
| 17 | V(int8_t, MachineType::Int8()) \ |
| 18 | V(uint8_t, MachineType::Uint8()) \ |
| 19 | V(int16_t, MachineType::Int16()) \ |
| 20 | V(uint16_t, MachineType::Uint16()) \ |
| 21 | V(int32_t, MachineType::Int32()) \ |
| 22 | V(uint32_t, MachineType::Uint32()) \ |
| 23 | V(int64_t, MachineType::Int64()) \ |
| 24 | V(uint64_t, MachineType::Uint64()) \ |
| 25 | V(float, MachineType::Float32()) \ |
| 26 | V(double, MachineType::Float64()) \ |
| 27 | V(void*, MachineType::Pointer()) \ |
| 28 | V(int*, MachineType::Pointer()) |
| 29 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 30 | template <typename T> |
| 31 | inline MachineType MachineTypeForC() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 32 | while (false) { |
| 33 | // All other types T must be assignable to Object* |
| 34 | *(static_cast<Object* volatile*>(0)) = static_cast<T>(0); |
| 35 | } |
| 36 | return MachineType::AnyTagged(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 37 | } |
| 38 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 39 | #define DECLARE_TEMPLATE_SPECIALIZATION(ctype, mtype) \ |
| 40 | template <> \ |
| 41 | inline MachineType MachineTypeForC<ctype>() { \ |
| 42 | return mtype; \ |
| 43 | } |
| 44 | FOREACH_CTYPE_MACHINE_TYPE_MAPPING(DECLARE_TEMPLATE_SPECIALIZATION) |
| 45 | #undef DECLARE_TEMPLATE_SPECIALIZATION |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 46 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 47 | // Helper for building machine signatures from C types. |
| 48 | class CSignature : public MachineSignature { |
| 49 | protected: |
| 50 | CSignature(size_t return_count, size_t parameter_count, MachineType* reps) |
| 51 | : MachineSignature(return_count, parameter_count, reps) {} |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 52 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 53 | public: |
| 54 | template <typename P1 = void, typename P2 = void, typename P3 = void, |
| 55 | typename P4 = void, typename P5 = void> |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 56 | static void VerifyParams(MachineSignature* sig) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 57 | // Verifies the C signature against the machine types. Maximum {5} params. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 58 | CHECK_LT(sig->parameter_count(), 6u); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 59 | const int kMax = 5; |
| 60 | MachineType params[] = {MachineTypeForC<P1>(), MachineTypeForC<P2>(), |
| 61 | MachineTypeForC<P3>(), MachineTypeForC<P4>(), |
| 62 | MachineTypeForC<P5>()}; |
| 63 | for (int p = kMax - 1; p >= 0; p--) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 64 | if (p < static_cast<int>(sig->parameter_count())) { |
| 65 | CHECK_EQ(sig->GetParam(p), params[p]); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 66 | } else { |
| 67 | CHECK_EQ(MachineType::None(), params[p]); |
| 68 | } |
| 69 | } |
| 70 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 71 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 72 | static CSignature* FromMachine(Zone* zone, MachineSignature* msig) { |
| 73 | return reinterpret_cast<CSignature*>(msig); |
| 74 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 75 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 76 | static CSignature* New(Zone* zone, MachineType ret, |
| 77 | MachineType p1 = MachineType::None(), |
| 78 | MachineType p2 = MachineType::None(), |
| 79 | MachineType p3 = MachineType::None(), |
| 80 | MachineType p4 = MachineType::None(), |
| 81 | MachineType p5 = MachineType::None()) { |
| 82 | MachineType* buffer = zone->NewArray<MachineType>(6); |
| 83 | int pos = 0; |
| 84 | size_t return_count = 0; |
| 85 | if (ret != MachineType::None()) { |
| 86 | buffer[pos++] = ret; |
| 87 | return_count++; |
| 88 | } |
| 89 | buffer[pos++] = p1; |
| 90 | buffer[pos++] = p2; |
| 91 | buffer[pos++] = p3; |
| 92 | buffer[pos++] = p4; |
| 93 | buffer[pos++] = p5; |
| 94 | size_t param_count = 5; |
| 95 | if (p5 == MachineType::None()) param_count--; |
| 96 | if (p4 == MachineType::None()) param_count--; |
| 97 | if (p3 == MachineType::None()) param_count--; |
| 98 | if (p2 == MachineType::None()) param_count--; |
| 99 | if (p1 == MachineType::None()) param_count--; |
| 100 | for (size_t i = 0; i < param_count; i++) { |
| 101 | // Check that there are no MachineType::None()'s in the middle of |
| 102 | // parameters. |
| 103 | CHECK_NE(MachineType::None(), buffer[return_count + i]); |
| 104 | } |
| 105 | return new (zone) CSignature(return_count, param_count, buffer); |
| 106 | } |
| 107 | }; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 108 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 109 | |
| 110 | template <typename Ret, uint16_t kParamCount> |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 111 | class CSignatureOf : public CSignature { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 112 | protected: |
| 113 | MachineType storage_[1 + kParamCount]; |
| 114 | |
| 115 | CSignatureOf() |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 116 | : CSignature(MachineTypeForC<Ret>() != MachineType::None() ? 1 : 0, |
| 117 | kParamCount, reinterpret_cast<MachineType*>(&storage_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 118 | if (return_count_ == 1) storage_[0] = MachineTypeForC<Ret>(); |
| 119 | } |
| 120 | void Set(int index, MachineType type) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 121 | CHECK_LE(0, index); |
| 122 | CHECK_LT(index, kParamCount); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 123 | reps_[return_count_ + index] = type; |
| 124 | } |
| 125 | }; |
| 126 | |
| 127 | // Helper classes for instantiating Signature objects to be callable from C. |
| 128 | template <typename Ret> |
| 129 | class CSignature0 : public CSignatureOf<Ret, 0> { |
| 130 | public: |
| 131 | CSignature0() : CSignatureOf<Ret, 0>() {} |
| 132 | }; |
| 133 | |
| 134 | template <typename Ret, typename P1> |
| 135 | class CSignature1 : public CSignatureOf<Ret, 1> { |
| 136 | public: |
| 137 | CSignature1() : CSignatureOf<Ret, 1>() { |
| 138 | this->Set(0, MachineTypeForC<P1>()); |
| 139 | } |
| 140 | }; |
| 141 | |
| 142 | template <typename Ret, typename P1, typename P2> |
| 143 | class CSignature2 : public CSignatureOf<Ret, 2> { |
| 144 | public: |
| 145 | CSignature2() : CSignatureOf<Ret, 2>() { |
| 146 | this->Set(0, MachineTypeForC<P1>()); |
| 147 | this->Set(1, MachineTypeForC<P2>()); |
| 148 | } |
| 149 | }; |
| 150 | |
| 151 | template <typename Ret, typename P1, typename P2, typename P3> |
| 152 | class CSignature3 : public CSignatureOf<Ret, 3> { |
| 153 | public: |
| 154 | CSignature3() : CSignatureOf<Ret, 3>() { |
| 155 | this->Set(0, MachineTypeForC<P1>()); |
| 156 | this->Set(1, MachineTypeForC<P2>()); |
| 157 | this->Set(2, MachineTypeForC<P3>()); |
| 158 | } |
| 159 | }; |
| 160 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 161 | typedef CSignature2<int32_t, int32_t, int32_t> CSignature_i_ii; |
| 162 | typedef CSignature2<uint32_t, uint32_t, uint32_t> CSignature_u_uu; |
| 163 | typedef CSignature2<float, float, float> CSignature_f_ff; |
| 164 | typedef CSignature2<double, double, double> CSignature_d_dd; |
| 165 | typedef CSignature2<Object*, Object*, Object*> CSignature_o_oo; |
| 166 | } // namespace compiler |
| 167 | } // namespace internal |
| 168 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 169 | |
| 170 | #endif // V8_COMPILER_C_SIGNATURE_H_ |