// 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_S390_REGISTER_S390_H_ #define V8_CODEGEN_S390_REGISTER_S390_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(r1) V(r2) V(r3) V(r4) V(r5) V(r6) V(r7) \ V(r8) V(r9) V(r10) V(fp) V(ip) V(r13) V(r14) V(sp) #define ALLOCATABLE_GENERAL_REGISTERS(V) \ V(r2) V(r3) V(r4) V(r5) V(r6) V(r7) \ V(r8) V(r9) V(r13) #define 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 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(d0) #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 const int kNumRegs = 16; // Caller-saved/arguments registers const RegList kJSCallerSaved = 1 << 1 | 1 << 2 | // r2 a1 1 << 3 | // r3 a2 1 << 4 | // r4 a3 1 << 5; // r5 a4 const int kNumJSCallerSaved = 5; // Callee-saved registers preserved when switching from C to JavaScript const RegList kCalleeSaved = 1 << 6 | // r6 (argument passing in CEntryStub) // (HandleScope logic in MacroAssembler) 1 << 7 | // r7 (argument passing in CEntryStub) // (HandleScope logic in MacroAssembler) 1 << 8 | // r8 (argument passing in CEntryStub) // (HandleScope logic in MacroAssembler) 1 << 9 | // r9 (HandleScope logic in MacroAssembler) 1 << 10 | // r10 (Roots register in Javascript) 1 << 11 | // r11 (fp in Javascript) 1 << 12 | // r12 (ip in Javascript) 1 << 13; // r13 (cp in Javascript) // 1 << 15; // r15 (sp in Javascript) const int kNumCalleeSaved = 8; 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 const int kNumCallerSavedDoubles = 8; const RegList kCalleeSavedDoubles = 1 << 8 | // d8 1 << 9 | // d9 1 << 10 | // d10 1 << 11 | // d11 1 << 12 | // d12 1 << 13 | // d12 1 << 14 | // d12 1 << 15; // d13 const int kNumCalleeSavedDoubles = 8; // Number of registers for which space is reserved in safepoints. Must be a // multiple of 8. // TODO(regis): Only 8 registers may actually be sufficient. Revisit. const int kNumSafepointRegisters = 16; // Define the list of registers actually saved at safepoints. // Note that the number of saved registers may be smaller than the reserved // space, i.e. kNumSafepointSavedRegisters <= kNumSafepointRegisters. const RegList kSafepointSavedRegisters = kJSCallerSaved | kCalleeSaved; const int kNumSafepointSavedRegisters = kNumJSCallerSaved + kNumCalleeSaved; // The following constants describe the stack frame linkage area as // defined by the ABI. #if V8_TARGET_ARCH_S390X // [0] Back Chain // [1] Reserved for compiler use // [2] GPR 2 // [3] GPR 3 // ... // [15] GPR 15 // [16] FPR 0 // [17] FPR 2 // [18] FPR 4 // [19] FPR 6 const int kNumRequiredStackFrameSlots = 20; const int kStackFrameRASlot = 14; const int kStackFrameSPSlot = 15; const int kStackFrameExtraParamSlot = 20; #else // [0] Back Chain // [1] Reserved for compiler use // [2] GPR 2 // [3] GPR 3 // ... // [15] GPR 15 // [16..17] FPR 0 // [18..19] FPR 2 // [20..21] FPR 4 // [22..23] FPR 6 const int kNumRequiredStackFrameSlots = 24; const int kStackFrameRASlot = 14; const int kStackFrameSPSlot = 15; const int kStackFrameExtraParamSlot = 24; #endif // zLinux ABI requires caller frames to include sufficient space for // callee preserved register save area. #if V8_TARGET_ARCH_S390X const int kCalleeRegisterSaveAreaSize = 160; #elif V8_TARGET_ARCH_S390 const int kCalleeRegisterSaveAreaSize = 96; #else const int kCalleeRegisterSaveAreaSize = 0; #endif enum RegisterCode { #define REGISTER_CODE(R) kRegCode_##R, GENERAL_REGISTERS(REGISTER_CODE) #undef REGISTER_CODE kRegAfterLast }; class Register : public RegisterBase { 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(); GENERAL_REGISTERS(DEFINE_REGISTER) #undef DEFINE_REGISTER constexpr Register no_reg = Register::no_reg(); // Register aliases constexpr Register kRootRegister = r10; // Roots array pointer. constexpr Register cp = r13; // 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 VFP register. class DoubleRegister : public RegisterBase { 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; inline static int NumRegisters(); 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(john.yan) Define SIMD registers. using Simd128Register = DoubleRegister; #define DEFINE_REGISTER(R) \ constexpr DoubleRegister R = DoubleRegister::from_code(); DOUBLE_REGISTERS(DEFINE_REGISTER) #undef DEFINE_REGISTER constexpr DoubleRegister no_dreg = DoubleRegister::no_reg(); 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 { 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(); 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 = r2; constexpr Register kReturnRegister1 = r3; constexpr Register kReturnRegister2 = r4; constexpr Register kJSFunctionRegister = r3; constexpr Register kContextRegister = r13; constexpr Register kAllocateSizeRegister = r3; constexpr Register kSpeculationPoisonRegister = r9; constexpr Register kInterpreterAccumulatorRegister = r2; constexpr Register kInterpreterBytecodeOffsetRegister = r6; constexpr Register kInterpreterBytecodeArrayRegister = r7; constexpr Register kInterpreterDispatchTableRegister = r8; constexpr Register kJavaScriptCallArgCountRegister = r2; constexpr Register kJavaScriptCallCodeStartRegister = r4; constexpr Register kJavaScriptCallTargetRegister = kJSFunctionRegister; constexpr Register kJavaScriptCallNewTargetRegister = r5; constexpr Register kJavaScriptCallExtraArg1Register = r4; constexpr Register kOffHeapTrampolineRegister = ip; constexpr Register kRuntimeCallFunctionRegister = r3; constexpr Register kRuntimeCallArgCountRegister = r2; constexpr Register kRuntimeCallArgvRegister = r4; constexpr Register kWasmInstanceRegister = r6; constexpr Register kWasmCompileLazyFuncIndexRegister = r7; } // namespace internal } // namespace v8 #endif // V8_CODEGEN_S390_REGISTER_S390_H_