| // Copyright 2018 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_CODEGEN_PPC_REGISTER_PPC_H_ |
| #define V8_CODEGEN_PPC_REGISTER_PPC_H_ |
| |
| #include "src/codegen/register.h" |
| #include "src/codegen/reglist.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // clang-format off |
| #define GENERAL_REGISTERS(V) \ |
| V(r0) V(sp) V(r2) V(r3) V(r4) V(r5) V(r6) V(r7) \ |
| V(r8) V(r9) V(r10) V(r11) V(ip) V(r13) V(r14) V(r15) \ |
| V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \ |
| V(r24) V(r25) V(r26) V(r27) V(r28) V(r29) V(r30) V(fp) |
| |
| #if V8_EMBEDDED_CONSTANT_POOL |
| #define ALLOCATABLE_GENERAL_REGISTERS(V) \ |
| V(r3) V(r4) V(r5) V(r6) V(r7) \ |
| V(r8) V(r9) V(r10) V(r14) V(r15) \ |
| V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \ |
| V(r24) V(r25) V(r26) V(r27) V(r30) |
| #else |
| #define ALLOCATABLE_GENERAL_REGISTERS(V) \ |
| V(r3) V(r4) V(r5) V(r6) V(r7) \ |
| V(r8) V(r9) V(r10) V(r14) V(r15) \ |
| V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \ |
| V(r24) V(r25) V(r26) V(r27) V(r28) V(r30) |
| #endif |
| |
| #define LOW_DOUBLE_REGISTERS(V) \ |
| V(d0) V(d1) V(d2) V(d3) V(d4) V(d5) V(d6) V(d7) \ |
| V(d8) V(d9) V(d10) V(d11) V(d12) V(d13) V(d14) V(d15) |
| |
| #define NON_LOW_DOUBLE_REGISTERS(V) \ |
| V(d16) V(d17) V(d18) V(d19) V(d20) V(d21) V(d22) V(d23) \ |
| V(d24) V(d25) V(d26) V(d27) V(d28) V(d29) V(d30) V(d31) |
| |
| #define DOUBLE_REGISTERS(V) \ |
| LOW_DOUBLE_REGISTERS(V) NON_LOW_DOUBLE_REGISTERS(V) |
| |
| #define FLOAT_REGISTERS DOUBLE_REGISTERS |
| #define SIMD128_REGISTERS DOUBLE_REGISTERS |
| |
| #define ALLOCATABLE_DOUBLE_REGISTERS(V) \ |
| V(d1) V(d2) V(d3) V(d4) V(d5) V(d6) V(d7) \ |
| V(d8) V(d9) V(d10) V(d11) V(d12) V(d15) \ |
| V(d16) V(d17) V(d18) V(d19) V(d20) V(d21) V(d22) V(d23) \ |
| V(d24) V(d25) V(d26) V(d27) V(d28) V(d29) V(d30) V(d31) |
| |
| #define C_REGISTERS(V) \ |
| V(cr0) V(cr1) V(cr2) V(cr3) V(cr4) V(cr5) V(cr6) V(cr7) \ |
| V(cr8) V(cr9) V(cr10) V(cr11) V(cr12) V(cr15) |
| // clang-format on |
| |
| // Register list in load/store instructions |
| // Note that the bit values must match those used in actual instruction encoding |
| |
| // Caller-saved/arguments registers |
| const RegList kJSCallerSaved = 1 << 3 | // r3 a1 |
| 1 << 4 | // r4 a2 |
| 1 << 5 | // r5 a3 |
| 1 << 6 | // r6 a4 |
| 1 << 7 | // r7 a5 |
| 1 << 8 | // r8 a6 |
| 1 << 9 | // r9 a7 |
| 1 << 10 | // r10 a8 |
| 1 << 11; |
| |
| const int kNumJSCallerSaved = 9; |
| |
| // Return the code of the n-th caller-saved register available to JavaScript |
| // e.g. JSCallerSavedReg(0) returns r0.code() == 0 |
| int JSCallerSavedCode(int n); |
| |
| // Callee-saved registers preserved when switching from C to JavaScript |
| const RegList kCalleeSaved = 1 << 14 | // r14 |
| 1 << 15 | // r15 |
| 1 << 16 | // r16 |
| 1 << 17 | // r17 |
| 1 << 18 | // r18 |
| 1 << 19 | // r19 |
| 1 << 20 | // r20 |
| 1 << 21 | // r21 |
| 1 << 22 | // r22 |
| 1 << 23 | // r23 |
| 1 << 24 | // r24 |
| 1 << 25 | // r25 |
| 1 << 26 | // r26 |
| 1 << 27 | // r27 |
| 1 << 28 | // r28 |
| 1 << 29 | // r29 |
| 1 << 30 | // r20 |
| 1 << 31; // r31 |
| |
| const int kNumCalleeSaved = 18; |
| |
| const RegList kCallerSavedDoubles = 1 << 0 | // d0 |
| 1 << 1 | // d1 |
| 1 << 2 | // d2 |
| 1 << 3 | // d3 |
| 1 << 4 | // d4 |
| 1 << 5 | // d5 |
| 1 << 6 | // d6 |
| 1 << 7 | // d7 |
| 1 << 8 | // d8 |
| 1 << 9 | // d9 |
| 1 << 10 | // d10 |
| 1 << 11 | // d11 |
| 1 << 12 | // d12 |
| 1 << 13; // d13 |
| |
| const int kNumCallerSavedDoubles = 14; |
| |
| const RegList kCalleeSavedDoubles = 1 << 14 | // d14 |
| 1 << 15 | // d15 |
| 1 << 16 | // d16 |
| 1 << 17 | // d17 |
| 1 << 18 | // d18 |
| 1 << 19 | // d19 |
| 1 << 20 | // d20 |
| 1 << 21 | // d21 |
| 1 << 22 | // d22 |
| 1 << 23 | // d23 |
| 1 << 24 | // d24 |
| 1 << 25 | // d25 |
| 1 << 26 | // d26 |
| 1 << 27 | // d27 |
| 1 << 28 | // d28 |
| 1 << 29 | // d29 |
| 1 << 30 | // d30 |
| 1 << 31; // d31 |
| |
| const int kNumCalleeSavedDoubles = 18; |
| |
| // The following constants describe the stack frame linkage area as |
| // defined by the ABI. Note that kNumRequiredStackFrameSlots must |
| // satisfy alignment requirements (rounding up if required). |
| #if V8_TARGET_ARCH_PPC64 && \ |
| (V8_TARGET_LITTLE_ENDIAN || \ |
| (defined(_CALL_ELF) && _CALL_ELF == 2)) // ELFv2 ABI |
| // [0] back chain |
| // [1] condition register save area |
| // [2] link register save area |
| // [3] TOC save area |
| // [4] Parameter1 save area |
| // ... |
| // [11] Parameter8 save area |
| // [12] Parameter9 slot (if necessary) |
| // ... |
| const int kNumRequiredStackFrameSlots = 12; |
| const int kStackFrameLRSlot = 2; |
| const int kStackFrameExtraParamSlot = 12; |
| #else // AIX |
| // [0] back chain |
| // [1] condition register save area |
| // [2] link register save area |
| // [3] reserved for compiler |
| // [4] reserved by binder |
| // [5] TOC save area |
| // [6] Parameter1 save area |
| // ... |
| // [13] Parameter8 save area |
| // [14] Parameter9 slot (if necessary) |
| // ... |
| const int kNumRequiredStackFrameSlots = 14; |
| const int kStackFrameLRSlot = 2; |
| const int kStackFrameExtraParamSlot = 14; |
| #endif |
| |
| enum RegisterCode { |
| #define REGISTER_CODE(R) kRegCode_##R, |
| GENERAL_REGISTERS(REGISTER_CODE) |
| #undef REGISTER_CODE |
| kRegAfterLast |
| }; |
| |
| class Register : public RegisterBase<Register, kRegAfterLast> { |
| public: |
| #if V8_TARGET_LITTLE_ENDIAN |
| static constexpr int kMantissaOffset = 0; |
| static constexpr int kExponentOffset = 4; |
| #else |
| static constexpr int kMantissaOffset = 4; |
| static constexpr int kExponentOffset = 0; |
| #endif |
| |
| private: |
| friend class RegisterBase; |
| explicit constexpr Register(int code) : RegisterBase(code) {} |
| }; |
| |
| ASSERT_TRIVIALLY_COPYABLE(Register); |
| static_assert(sizeof(Register) == sizeof(int), |
| "Register can efficiently be passed by value"); |
| |
| #define DEFINE_REGISTER(R) \ |
| constexpr Register R = Register::from_code(kRegCode_##R); |
| GENERAL_REGISTERS(DEFINE_REGISTER) |
| #undef DEFINE_REGISTER |
| constexpr Register no_reg = Register::no_reg(); |
| |
| // Aliases |
| constexpr Register kConstantPoolRegister = r28; // Constant pool. |
| constexpr Register kRootRegister = r29; // Roots array pointer. |
| constexpr Register cp = r30; // JavaScript context pointer. |
| |
| constexpr bool kPadArguments = false; |
| constexpr bool kSimpleFPAliasing = true; |
| constexpr bool kSimdMaskRegisters = false; |
| |
| enum DoubleRegisterCode { |
| #define REGISTER_CODE(R) kDoubleCode_##R, |
| DOUBLE_REGISTERS(REGISTER_CODE) |
| #undef REGISTER_CODE |
| kDoubleAfterLast |
| }; |
| |
| // Double word FP register. |
| class DoubleRegister : public RegisterBase<DoubleRegister, kDoubleAfterLast> { |
| public: |
| // A few double registers are reserved: one as a scratch register and one to |
| // hold 0.0, that does not fit in the immediate field of vmov instructions. |
| // d14: 0.0 |
| // d15: scratch register. |
| static constexpr int kSizeInBytes = 8; |
| |
| // This function differs from kNumRegisters by returning the number of double |
| // registers supported by the current CPU, while kNumRegisters always returns |
| // 32. |
| inline static int SupportedRegisterCount(); |
| |
| private: |
| friend class RegisterBase; |
| explicit constexpr DoubleRegister(int code) : RegisterBase(code) {} |
| }; |
| |
| ASSERT_TRIVIALLY_COPYABLE(DoubleRegister); |
| static_assert(sizeof(DoubleRegister) == sizeof(int), |
| "DoubleRegister can efficiently be passed by value"); |
| |
| using FloatRegister = DoubleRegister; |
| |
| // TODO(ppc) Define SIMD registers. |
| using Simd128Register = DoubleRegister; |
| |
| #define DEFINE_REGISTER(R) \ |
| constexpr DoubleRegister R = DoubleRegister::from_code(kDoubleCode_##R); |
| DOUBLE_REGISTERS(DEFINE_REGISTER) |
| #undef DEFINE_REGISTER |
| constexpr DoubleRegister no_dreg = DoubleRegister::no_reg(); |
| |
| constexpr DoubleRegister kFirstCalleeSavedDoubleReg = d14; |
| constexpr DoubleRegister kLastCalleeSavedDoubleReg = d31; |
| constexpr DoubleRegister kDoubleRegZero = d14; |
| constexpr DoubleRegister kScratchDoubleReg = d13; |
| |
| Register ToRegister(int num); |
| |
| enum CRegisterCode { |
| #define REGISTER_CODE(R) kCCode_##R, |
| C_REGISTERS(REGISTER_CODE) |
| #undef REGISTER_CODE |
| kCAfterLast |
| }; |
| |
| // Coprocessor register |
| class CRegister : public RegisterBase<CRegister, kCAfterLast> { |
| friend class RegisterBase; |
| explicit constexpr CRegister(int code) : RegisterBase(code) {} |
| }; |
| |
| constexpr CRegister no_creg = CRegister::no_reg(); |
| #define DECLARE_C_REGISTER(R) \ |
| constexpr CRegister R = CRegister::from_code(kCCode_##R); |
| C_REGISTERS(DECLARE_C_REGISTER) |
| #undef DECLARE_C_REGISTER |
| |
| // Define {RegisterName} methods for the register types. |
| DEFINE_REGISTER_NAMES(Register, GENERAL_REGISTERS) |
| DEFINE_REGISTER_NAMES(DoubleRegister, DOUBLE_REGISTERS) |
| |
| // Give alias names to registers for calling conventions. |
| constexpr Register kReturnRegister0 = r3; |
| constexpr Register kReturnRegister1 = r4; |
| constexpr Register kReturnRegister2 = r5; |
| constexpr Register kJSFunctionRegister = r4; |
| constexpr Register kContextRegister = r30; |
| constexpr Register kAllocateSizeRegister = r4; |
| constexpr Register kSpeculationPoisonRegister = r14; |
| constexpr Register kInterpreterAccumulatorRegister = r3; |
| constexpr Register kInterpreterBytecodeOffsetRegister = r15; |
| constexpr Register kInterpreterBytecodeArrayRegister = r16; |
| constexpr Register kInterpreterDispatchTableRegister = r17; |
| |
| constexpr Register kJavaScriptCallArgCountRegister = r3; |
| constexpr Register kJavaScriptCallCodeStartRegister = r5; |
| constexpr Register kJavaScriptCallTargetRegister = kJSFunctionRegister; |
| constexpr Register kJavaScriptCallNewTargetRegister = r6; |
| constexpr Register kJavaScriptCallExtraArg1Register = r5; |
| |
| constexpr Register kOffHeapTrampolineRegister = ip; |
| constexpr Register kRuntimeCallFunctionRegister = r4; |
| constexpr Register kRuntimeCallArgCountRegister = r3; |
| constexpr Register kRuntimeCallArgvRegister = r5; |
| constexpr Register kWasmInstanceRegister = r10; |
| constexpr Register kWasmCompileLazyFuncIndexRegister = r15; |
| |
| constexpr DoubleRegister kFPReturnRegister0 = d1; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_CODEGEN_PPC_REGISTER_PPC_H_ |