// 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-base.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(V) \ V(v0) V(v1) V(v2) V(v3) V(v4) V(v5) V(v6) V(v7) \ V(v8) V(v9) V(v10) V(v11) V(v12) V(v13) V(v14) V(v15) \ V(v16) V(v17) V(v18) V(v19) V(v20) V(v21) V(v22) V(v23) \ V(v24) V(v25) V(v26) V(v27) V(v28) V(v29) V(v30) V(v31) #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 // 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 { 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. // Returns the number of padding slots needed for stack pointer alignment. constexpr int ArgumentPaddingSlots(int argument_count) { // No argument padding required. return 0; } constexpr AliasingKind kFPAliasing = AliasingKind::kOverlap; 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 { 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; // | | 0 // | | 1 // | | 2 // | | ... // | | 31 // VSX | // | | 32 // | | 33 // | VMX | 34 // | | ... // | | 63 // // VSX registers (0 to 63) can be used by VSX vector instructions, which are // mainly focused on Floating Point arithmetic. They do have few Integer // Instructions such as logical operations, merge and select. The main Simd // integer instructions such as add/sub/mul/ extract_lane/replace_lane, // comparisons etc. are only available with VMX instructions and can only access // the VMX set of vector registers (which is a subset of VSX registers). So to // assure access to all Simd instructions in V8 and avoid moving data between // registers, we are only using the upper 32 registers (VMX set) for Simd // operations and only use the lower set for scalar (non simd) floating point // operations which makes our Simd register set separate from Floating Point // ones. enum Simd128RegisterCode { #define REGISTER_CODE(R) kSimd128Code_##R, SIMD128_REGISTERS(REGISTER_CODE) #undef REGISTER_CODE kSimd128AfterLast }; // Simd128 register. class Simd128Register : public RegisterBase { private: friend class RegisterBase; explicit constexpr Simd128Register(int code) : RegisterBase(code) {} }; ASSERT_TRIVIALLY_COPYABLE(Simd128Register); static_assert(sizeof(Simd128Register) <= sizeof(int), "Simd128Register can efficiently be passed by value"); #define DECLARE_SIMD128_REGISTER(R) \ constexpr Simd128Register R = Simd128Register::from_code(kSimd128Code_##R); SIMD128_REGISTERS(DECLARE_SIMD128_REGISTER) #undef DECLARE_SIMD128_REGISTER const Simd128Register no_simdreg = Simd128Register::no_reg(); #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; // Simd128 zero and scratch regs must have the same numbers as Double zero and // scratch constexpr Simd128Register kSimd128RegZero = v14; constexpr Simd128Register kScratchSimd128Reg = v13; 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(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) DEFINE_REGISTER_NAMES(Simd128Register, SIMD128_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 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_