jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Ian Rogers | 166db04 | 2013-07-26 12:05:57 -0700 | [diff] [blame] | 17 | #ifndef ART_COMPILER_UTILS_MIPS_MANAGED_REGISTER_MIPS_H_ |
| 18 | #define ART_COMPILER_UTILS_MIPS_MANAGED_REGISTER_MIPS_H_ |
jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [diff] [blame] | 19 | |
| 20 | #include "constants_mips.h" |
Ian Rogers | 166db04 | 2013-07-26 12:05:57 -0700 | [diff] [blame] | 21 | #include "utils/managed_register.h" |
jeffhao | 7fbee07 | 2012-08-24 17:56:54 -0700 | [diff] [blame] | 22 | |
| 23 | namespace art { |
| 24 | namespace mips { |
| 25 | |
| 26 | // Values for register pairs. |
| 27 | enum RegisterPair { |
| 28 | V0_V1 = 0, |
| 29 | A0_A1 = 1, |
| 30 | A2_A3 = 2, |
| 31 | T0_T1 = 3, |
| 32 | T2_T3 = 4, |
| 33 | T4_T5 = 5, |
| 34 | T6_T7 = 6, |
| 35 | S0_S1 = 7, |
| 36 | S2_S3 = 8, |
| 37 | S4_S5 = 9, |
| 38 | S6_S7 = 10, |
| 39 | A1_A2 = 11, // Dalvik style passing |
| 40 | kNumberOfRegisterPairs = 12, |
| 41 | kNoRegisterPair = -1, |
| 42 | }; |
| 43 | |
| 44 | std::ostream& operator<<(std::ostream& os, const RegisterPair& reg); |
| 45 | |
| 46 | const int kNumberOfCoreRegIds = kNumberOfCoreRegisters; |
| 47 | const int kNumberOfCoreAllocIds = kNumberOfCoreRegisters; |
| 48 | |
| 49 | const int kNumberOfFRegIds = kNumberOfFRegisters; |
| 50 | const int kNumberOfFAllocIds = kNumberOfFRegisters; |
| 51 | |
| 52 | const int kNumberOfDRegIds = kNumberOfDRegisters; |
| 53 | const int kNumberOfOverlappingDRegIds = kNumberOfOverlappingDRegisters; |
| 54 | const int kNumberOfDAllocIds = kNumberOfDRegisters; |
| 55 | |
| 56 | const int kNumberOfPairRegIds = kNumberOfRegisterPairs; |
| 57 | |
| 58 | const int kNumberOfRegIds = kNumberOfCoreRegIds + kNumberOfFRegIds + |
| 59 | kNumberOfDRegIds + kNumberOfPairRegIds; |
| 60 | const int kNumberOfAllocIds = |
| 61 | kNumberOfCoreAllocIds + kNumberOfFAllocIds + kNumberOfDAllocIds; |
| 62 | |
| 63 | // Register ids map: |
| 64 | // [0..R[ core registers (enum Register) |
| 65 | // [R..F[ single precision FP registers (enum FRegister) |
| 66 | // [F..D[ double precision FP registers (enum DRegister) |
| 67 | // [D..P[ core register pairs (enum RegisterPair) |
| 68 | // where |
| 69 | // R = kNumberOfCoreRegIds |
| 70 | // F = R + kNumberOfFRegIds |
| 71 | // D = F + kNumberOfDRegIds |
| 72 | // P = D + kNumberOfRegisterPairs |
| 73 | |
| 74 | // Allocation ids map: |
| 75 | // [0..R[ core registers (enum Register) |
| 76 | // [R..F[ single precision FP registers (enum FRegister) |
| 77 | // where |
| 78 | // R = kNumberOfCoreRegIds |
| 79 | // F = R + kNumberOfFRegIds |
| 80 | |
| 81 | |
| 82 | // An instance of class 'ManagedRegister' represents a single core register (enum |
| 83 | // Register), a single precision FP register (enum FRegister), a double precision |
| 84 | // FP register (enum DRegister), or a pair of core registers (enum RegisterPair). |
| 85 | // 'ManagedRegister::NoRegister()' provides an invalid register. |
| 86 | // There is a one-to-one mapping between ManagedRegister and register id. |
| 87 | class MipsManagedRegister : public ManagedRegister { |
| 88 | public: |
| 89 | Register AsCoreRegister() const { |
| 90 | CHECK(IsCoreRegister()); |
| 91 | return static_cast<Register>(id_); |
| 92 | } |
| 93 | |
| 94 | FRegister AsFRegister() const { |
| 95 | CHECK(IsFRegister()); |
| 96 | return static_cast<FRegister>(id_ - kNumberOfCoreRegIds); |
| 97 | } |
| 98 | |
| 99 | DRegister AsDRegister() const { |
| 100 | CHECK(IsDRegister()); |
| 101 | return static_cast<DRegister>(id_ - kNumberOfCoreRegIds - kNumberOfFRegIds); |
| 102 | } |
| 103 | |
| 104 | FRegister AsOverlappingDRegisterLow() const { |
| 105 | CHECK(IsOverlappingDRegister()); |
| 106 | DRegister d_reg = AsDRegister(); |
| 107 | return static_cast<FRegister>(d_reg * 2); |
| 108 | } |
| 109 | |
| 110 | FRegister AsOverlappingDRegisterHigh() const { |
| 111 | CHECK(IsOverlappingDRegister()); |
| 112 | DRegister d_reg = AsDRegister(); |
| 113 | return static_cast<FRegister>(d_reg * 2 + 1); |
| 114 | } |
| 115 | |
| 116 | Register AsRegisterPairLow() const { |
| 117 | CHECK(IsRegisterPair()); |
| 118 | // Appropriate mapping of register ids allows to use AllocIdLow(). |
| 119 | return FromRegId(AllocIdLow()).AsCoreRegister(); |
| 120 | } |
| 121 | |
| 122 | Register AsRegisterPairHigh() const { |
| 123 | CHECK(IsRegisterPair()); |
| 124 | // Appropriate mapping of register ids allows to use AllocIdHigh(). |
| 125 | return FromRegId(AllocIdHigh()).AsCoreRegister(); |
| 126 | } |
| 127 | |
| 128 | bool IsCoreRegister() const { |
| 129 | CHECK(IsValidManagedRegister()); |
| 130 | return (0 <= id_) && (id_ < kNumberOfCoreRegIds); |
| 131 | } |
| 132 | |
| 133 | bool IsFRegister() const { |
| 134 | CHECK(IsValidManagedRegister()); |
| 135 | const int test = id_ - kNumberOfCoreRegIds; |
| 136 | return (0 <= test) && (test < kNumberOfFRegIds); |
| 137 | } |
| 138 | |
| 139 | bool IsDRegister() const { |
| 140 | CHECK(IsValidManagedRegister()); |
| 141 | const int test = id_ - (kNumberOfCoreRegIds + kNumberOfFRegIds); |
| 142 | return (0 <= test) && (test < kNumberOfDRegIds); |
| 143 | } |
| 144 | |
| 145 | // Returns true if this DRegister overlaps FRegisters. |
| 146 | bool IsOverlappingDRegister() const { |
| 147 | CHECK(IsValidManagedRegister()); |
| 148 | const int test = id_ - (kNumberOfCoreRegIds + kNumberOfFRegIds); |
| 149 | return (0 <= test) && (test < kNumberOfOverlappingDRegIds); |
| 150 | } |
| 151 | |
| 152 | bool IsRegisterPair() const { |
| 153 | CHECK(IsValidManagedRegister()); |
| 154 | const int test = |
| 155 | id_ - (kNumberOfCoreRegIds + kNumberOfFRegIds + kNumberOfDRegIds); |
| 156 | return (0 <= test) && (test < kNumberOfPairRegIds); |
| 157 | } |
| 158 | |
| 159 | void Print(std::ostream& os) const; |
| 160 | |
| 161 | // Returns true if the two managed-registers ('this' and 'other') overlap. |
| 162 | // Either managed-register may be the NoRegister. If both are the NoRegister |
| 163 | // then false is returned. |
| 164 | bool Overlaps(const MipsManagedRegister& other) const; |
| 165 | |
| 166 | static MipsManagedRegister FromCoreRegister(Register r) { |
| 167 | CHECK_NE(r, kNoRegister); |
| 168 | return FromRegId(r); |
| 169 | } |
| 170 | |
| 171 | static MipsManagedRegister FromFRegister(FRegister r) { |
| 172 | CHECK_NE(r, kNoFRegister); |
| 173 | return FromRegId(r + kNumberOfCoreRegIds); |
| 174 | } |
| 175 | |
| 176 | static MipsManagedRegister FromDRegister(DRegister r) { |
| 177 | CHECK_NE(r, kNoDRegister); |
| 178 | return FromRegId(r + kNumberOfCoreRegIds + kNumberOfFRegIds); |
| 179 | } |
| 180 | |
| 181 | static MipsManagedRegister FromRegisterPair(RegisterPair r) { |
| 182 | CHECK_NE(r, kNoRegisterPair); |
| 183 | return FromRegId(r + (kNumberOfCoreRegIds + kNumberOfFRegIds + kNumberOfDRegIds)); |
| 184 | } |
| 185 | |
| 186 | private: |
| 187 | bool IsValidManagedRegister() const { |
| 188 | return (0 <= id_) && (id_ < kNumberOfRegIds); |
| 189 | } |
| 190 | |
| 191 | int RegId() const { |
| 192 | CHECK(!IsNoRegister()); |
| 193 | return id_; |
| 194 | } |
| 195 | |
| 196 | int AllocId() const { |
| 197 | CHECK(IsValidManagedRegister() && !IsOverlappingDRegister() && !IsRegisterPair()); |
| 198 | CHECK_LT(id_, kNumberOfAllocIds); |
| 199 | return id_; |
| 200 | } |
| 201 | |
| 202 | int AllocIdLow() const; |
| 203 | int AllocIdHigh() const; |
| 204 | |
| 205 | friend class ManagedRegister; |
| 206 | |
| 207 | explicit MipsManagedRegister(int reg_id) : ManagedRegister(reg_id) {} |
| 208 | |
| 209 | static MipsManagedRegister FromRegId(int reg_id) { |
| 210 | MipsManagedRegister reg(reg_id); |
| 211 | CHECK(reg.IsValidManagedRegister()); |
| 212 | return reg; |
| 213 | } |
| 214 | }; |
| 215 | |
| 216 | std::ostream& operator<<(std::ostream& os, const MipsManagedRegister& reg); |
| 217 | |
| 218 | } // namespace mips |
| 219 | |
| 220 | inline mips::MipsManagedRegister ManagedRegister::AsMips() const { |
| 221 | mips::MipsManagedRegister reg(id_); |
| 222 | CHECK(reg.IsNoRegister() || reg.IsValidManagedRegister()); |
| 223 | return reg; |
| 224 | } |
| 225 | |
| 226 | } // namespace art |
| 227 | |
Ian Rogers | 166db04 | 2013-07-26 12:05:57 -0700 | [diff] [blame] | 228 | #endif // ART_COMPILER_UTILS_MIPS_MANAGED_REGISTER_MIPS_H_ |