1 // Copyright 2018 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_CODEGEN_PPC_REGISTER_PPC_H_ 6 #define V8_CODEGEN_PPC_REGISTER_PPC_H_ 7 8 #include "src/codegen/register.h" 9 #include "src/codegen/reglist.h" 10 11 namespace v8 { 12 namespace internal { 13 14 // clang-format off 15 #define GENERAL_REGISTERS(V) \ 16 V(r0) V(sp) V(r2) V(r3) V(r4) V(r5) V(r6) V(r7) \ 17 V(r8) V(r9) V(r10) V(r11) V(ip) V(r13) V(r14) V(r15) \ 18 V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \ 19 V(r24) V(r25) V(r26) V(r27) V(r28) V(r29) V(r30) V(fp) 20 21 #if V8_EMBEDDED_CONSTANT_POOL 22 #define ALLOCATABLE_GENERAL_REGISTERS(V) \ 23 V(r3) V(r4) V(r5) V(r6) V(r7) \ 24 V(r8) V(r9) V(r10) V(r14) V(r15) \ 25 V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \ 26 V(r24) V(r25) V(r26) V(r27) V(r30) 27 #else 28 #define ALLOCATABLE_GENERAL_REGISTERS(V) \ 29 V(r3) V(r4) V(r5) V(r6) V(r7) \ 30 V(r8) V(r9) V(r10) V(r14) V(r15) \ 31 V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \ 32 V(r24) V(r25) V(r26) V(r27) V(r28) V(r30) 33 #endif 34 35 #define LOW_DOUBLE_REGISTERS(V) \ 36 V(d0) V(d1) V(d2) V(d3) V(d4) V(d5) V(d6) V(d7) \ 37 V(d8) V(d9) V(d10) V(d11) V(d12) V(d13) V(d14) V(d15) 38 39 #define NON_LOW_DOUBLE_REGISTERS(V) \ 40 V(d16) V(d17) V(d18) V(d19) V(d20) V(d21) V(d22) V(d23) \ 41 V(d24) V(d25) V(d26) V(d27) V(d28) V(d29) V(d30) V(d31) 42 43 #define DOUBLE_REGISTERS(V) \ 44 LOW_DOUBLE_REGISTERS(V) NON_LOW_DOUBLE_REGISTERS(V) 45 46 #define FLOAT_REGISTERS DOUBLE_REGISTERS 47 #define SIMD128_REGISTERS DOUBLE_REGISTERS 48 49 #define ALLOCATABLE_DOUBLE_REGISTERS(V) \ 50 V(d1) V(d2) V(d3) V(d4) V(d5) V(d6) V(d7) \ 51 V(d8) V(d9) V(d10) V(d11) V(d12) V(d15) \ 52 V(d16) V(d17) V(d18) V(d19) V(d20) V(d21) V(d22) V(d23) \ 53 V(d24) V(d25) V(d26) V(d27) V(d28) V(d29) V(d30) V(d31) 54 55 #define C_REGISTERS(V) \ 56 V(cr0) V(cr1) V(cr2) V(cr3) V(cr4) V(cr5) V(cr6) V(cr7) \ 57 V(cr8) V(cr9) V(cr10) V(cr11) V(cr12) V(cr15) 58 // clang-format on 59 60 // Register list in load/store instructions 61 // Note that the bit values must match those used in actual instruction encoding 62 63 // Caller-saved/arguments registers 64 const RegList kJSCallerSaved = 1 << 3 | // r3 a1 65 1 << 4 | // r4 a2 66 1 << 5 | // r5 a3 67 1 << 6 | // r6 a4 68 1 << 7 | // r7 a5 69 1 << 8 | // r8 a6 70 1 << 9 | // r9 a7 71 1 << 10 | // r10 a8 72 1 << 11; 73 74 const int kNumJSCallerSaved = 9; 75 76 // Return the code of the n-th caller-saved register available to JavaScript 77 // e.g. JSCallerSavedReg(0) returns r0.code() == 0 78 int JSCallerSavedCode(int n); 79 80 // Callee-saved registers preserved when switching from C to JavaScript 81 const RegList kCalleeSaved = 1 << 14 | // r14 82 1 << 15 | // r15 83 1 << 16 | // r16 84 1 << 17 | // r17 85 1 << 18 | // r18 86 1 << 19 | // r19 87 1 << 20 | // r20 88 1 << 21 | // r21 89 1 << 22 | // r22 90 1 << 23 | // r23 91 1 << 24 | // r24 92 1 << 25 | // r25 93 1 << 26 | // r26 94 1 << 27 | // r27 95 1 << 28 | // r28 96 1 << 29 | // r29 97 1 << 30 | // r20 98 1 << 31; // r31 99 100 const int kNumCalleeSaved = 18; 101 102 const RegList kCallerSavedDoubles = 1 << 0 | // d0 103 1 << 1 | // d1 104 1 << 2 | // d2 105 1 << 3 | // d3 106 1 << 4 | // d4 107 1 << 5 | // d5 108 1 << 6 | // d6 109 1 << 7 | // d7 110 1 << 8 | // d8 111 1 << 9 | // d9 112 1 << 10 | // d10 113 1 << 11 | // d11 114 1 << 12 | // d12 115 1 << 13; // d13 116 117 const int kNumCallerSavedDoubles = 14; 118 119 const RegList kCalleeSavedDoubles = 1 << 14 | // d14 120 1 << 15 | // d15 121 1 << 16 | // d16 122 1 << 17 | // d17 123 1 << 18 | // d18 124 1 << 19 | // d19 125 1 << 20 | // d20 126 1 << 21 | // d21 127 1 << 22 | // d22 128 1 << 23 | // d23 129 1 << 24 | // d24 130 1 << 25 | // d25 131 1 << 26 | // d26 132 1 << 27 | // d27 133 1 << 28 | // d28 134 1 << 29 | // d29 135 1 << 30 | // d30 136 1 << 31; // d31 137 138 const int kNumCalleeSavedDoubles = 18; 139 140 // The following constants describe the stack frame linkage area as 141 // defined by the ABI. Note that kNumRequiredStackFrameSlots must 142 // satisfy alignment requirements (rounding up if required). 143 #if V8_TARGET_ARCH_PPC64 && \ 144 (V8_TARGET_LITTLE_ENDIAN || \ 145 (defined(_CALL_ELF) && _CALL_ELF == 2)) // ELFv2 ABI 146 // [0] back chain 147 // [1] condition register save area 148 // [2] link register save area 149 // [3] TOC save area 150 // [4] Parameter1 save area 151 // ... 152 // [11] Parameter8 save area 153 // [12] Parameter9 slot (if necessary) 154 // ... 155 const int kNumRequiredStackFrameSlots = 12; 156 const int kStackFrameLRSlot = 2; 157 const int kStackFrameExtraParamSlot = 12; 158 #else // AIX 159 // [0] back chain 160 // [1] condition register save area 161 // [2] link register save area 162 // [3] reserved for compiler 163 // [4] reserved by binder 164 // [5] TOC save area 165 // [6] Parameter1 save area 166 // ... 167 // [13] Parameter8 save area 168 // [14] Parameter9 slot (if necessary) 169 // ... 170 const int kNumRequiredStackFrameSlots = 14; 171 const int kStackFrameLRSlot = 2; 172 const int kStackFrameExtraParamSlot = 14; 173 #endif 174 175 enum RegisterCode { 176 #define REGISTER_CODE(R) kRegCode_##R, 177 GENERAL_REGISTERS(REGISTER_CODE) 178 #undef REGISTER_CODE 179 kRegAfterLast 180 }; 181 182 class Register : public RegisterBase<Register, kRegAfterLast> { 183 public: 184 #if V8_TARGET_LITTLE_ENDIAN 185 static constexpr int kMantissaOffset = 0; 186 static constexpr int kExponentOffset = 4; 187 #else 188 static constexpr int kMantissaOffset = 4; 189 static constexpr int kExponentOffset = 0; 190 #endif 191 192 private: 193 friend class RegisterBase; Register(int code)194 explicit constexpr Register(int code) : RegisterBase(code) {} 195 }; 196 197 ASSERT_TRIVIALLY_COPYABLE(Register); 198 static_assert(sizeof(Register) == sizeof(int), 199 "Register can efficiently be passed by value"); 200 201 #define DEFINE_REGISTER(R) \ 202 constexpr Register R = Register::from_code(kRegCode_##R); 203 GENERAL_REGISTERS(DEFINE_REGISTER) 204 #undef DEFINE_REGISTER 205 constexpr Register no_reg = Register::no_reg(); 206 207 // Aliases 208 constexpr Register kConstantPoolRegister = r28; // Constant pool. 209 constexpr Register kRootRegister = r29; // Roots array pointer. 210 constexpr Register cp = r30; // JavaScript context pointer. 211 212 constexpr bool kPadArguments = false; 213 constexpr bool kSimpleFPAliasing = true; 214 constexpr bool kSimdMaskRegisters = false; 215 216 enum DoubleRegisterCode { 217 #define REGISTER_CODE(R) kDoubleCode_##R, 218 DOUBLE_REGISTERS(REGISTER_CODE) 219 #undef REGISTER_CODE 220 kDoubleAfterLast 221 }; 222 223 // Double word FP register. 224 class DoubleRegister : public RegisterBase<DoubleRegister, kDoubleAfterLast> { 225 public: 226 // A few double registers are reserved: one as a scratch register and one to 227 // hold 0.0, that does not fit in the immediate field of vmov instructions. 228 // d14: 0.0 229 // d15: scratch register. 230 static constexpr int kSizeInBytes = 8; 231 inline static int NumRegisters(); 232 233 private: 234 friend class RegisterBase; DoubleRegister(int code)235 explicit constexpr DoubleRegister(int code) : RegisterBase(code) {} 236 }; 237 238 ASSERT_TRIVIALLY_COPYABLE(DoubleRegister); 239 static_assert(sizeof(DoubleRegister) == sizeof(int), 240 "DoubleRegister can efficiently be passed by value"); 241 242 using FloatRegister = DoubleRegister; 243 244 // TODO(ppc) Define SIMD registers. 245 using Simd128Register = DoubleRegister; 246 247 #define DEFINE_REGISTER(R) \ 248 constexpr DoubleRegister R = DoubleRegister::from_code(kDoubleCode_##R); 249 DOUBLE_REGISTERS(DEFINE_REGISTER) 250 #undef DEFINE_REGISTER 251 constexpr DoubleRegister no_dreg = DoubleRegister::no_reg(); 252 253 constexpr DoubleRegister kFirstCalleeSavedDoubleReg = d14; 254 constexpr DoubleRegister kLastCalleeSavedDoubleReg = d31; 255 constexpr DoubleRegister kDoubleRegZero = d14; 256 constexpr DoubleRegister kScratchDoubleReg = d13; 257 258 Register ToRegister(int num); 259 260 enum CRegisterCode { 261 #define REGISTER_CODE(R) kCCode_##R, 262 C_REGISTERS(REGISTER_CODE) 263 #undef REGISTER_CODE 264 kCAfterLast 265 }; 266 267 // Coprocessor register 268 class CRegister : public RegisterBase<CRegister, kCAfterLast> { 269 friend class RegisterBase; CRegister(int code)270 explicit constexpr CRegister(int code) : RegisterBase(code) {} 271 }; 272 273 constexpr CRegister no_creg = CRegister::no_reg(); 274 #define DECLARE_C_REGISTER(R) \ 275 constexpr CRegister R = CRegister::from_code(kCCode_##R); 276 C_REGISTERS(DECLARE_C_REGISTER) 277 #undef DECLARE_C_REGISTER 278 279 // Define {RegisterName} methods for the register types. 280 DEFINE_REGISTER_NAMES(Register, GENERAL_REGISTERS) 281 DEFINE_REGISTER_NAMES(DoubleRegister, DOUBLE_REGISTERS) 282 283 // Give alias names to registers for calling conventions. 284 constexpr Register kReturnRegister0 = r3; 285 constexpr Register kReturnRegister1 = r4; 286 constexpr Register kReturnRegister2 = r5; 287 constexpr Register kJSFunctionRegister = r4; 288 constexpr Register kContextRegister = r30; 289 constexpr Register kAllocateSizeRegister = r4; 290 constexpr Register kSpeculationPoisonRegister = r14; 291 constexpr Register kInterpreterAccumulatorRegister = r3; 292 constexpr Register kInterpreterBytecodeOffsetRegister = r15; 293 constexpr Register kInterpreterBytecodeArrayRegister = r16; 294 constexpr Register kInterpreterDispatchTableRegister = r17; 295 296 constexpr Register kJavaScriptCallArgCountRegister = r3; 297 constexpr Register kJavaScriptCallCodeStartRegister = r5; 298 constexpr Register kJavaScriptCallTargetRegister = kJSFunctionRegister; 299 constexpr Register kJavaScriptCallNewTargetRegister = r6; 300 constexpr Register kJavaScriptCallExtraArg1Register = r5; 301 302 constexpr Register kOffHeapTrampolineRegister = ip; 303 constexpr Register kRuntimeCallFunctionRegister = r4; 304 constexpr Register kRuntimeCallArgCountRegister = r3; 305 constexpr Register kRuntimeCallArgvRegister = r5; 306 constexpr Register kWasmInstanceRegister = r10; 307 constexpr Register kWasmCompileLazyFuncIndexRegister = r15; 308 309 } // namespace internal 310 } // namespace v8 311 312 #endif // V8_CODEGEN_PPC_REGISTER_PPC_H_ 313