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Diffstat (limited to 'deps/v8/src/s390/register-s390.h')
| -rw-r--r-- | deps/v8/src/s390/register-s390.h | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/deps/v8/src/s390/register-s390.h b/deps/v8/src/s390/register-s390.h new file mode 100644 index 0000000000..e0114342e0 --- /dev/null +++ b/deps/v8/src/s390/register-s390.h @@ -0,0 +1,281 @@ +// 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_S390_REGISTER_S390_H_ +#define V8_S390_REGISTER_S390_H_ + +#include "src/register.h" +#include "src/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<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(); + +// 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<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"); + +typedef DoubleRegister FloatRegister; + +// TODO(john.yan) Define SIMD registers. +typedef DoubleRegister Simd128Register; + +#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 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 = 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_S390_REGISTER_S390_H_ |