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Diffstat (limited to 'deps/v8/src/codegen/ppc/register-ppc.h')
| -rw-r--r-- | deps/v8/src/codegen/ppc/register-ppc.h | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/deps/v8/src/codegen/ppc/register-ppc.h b/deps/v8/src/codegen/ppc/register-ppc.h new file mode 100644 index 0000000000..63a9fd803c --- /dev/null +++ b/deps/v8/src/codegen/ppc/register-ppc.h @@ -0,0 +1,323 @@ +// 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 +const int kNumRegs = 32; + +// 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; + +// Number of registers for which space is reserved in safepoints. Must be a +// multiple of 8. +const int kNumSafepointRegisters = 32; + +// 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 + +// 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; + +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; + 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(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; + +} // namespace internal +} // namespace v8 + +#endif // V8_CODEGEN_PPC_REGISTER_PPC_H_ |