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// 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(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
// 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.
// Returns the number of padding slots needed for stack pointer alignment.
constexpr int ArgumentPaddingSlots(int argument_count) {
// No argument padding required.
return 0;
}
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;
// | | 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<Simd128Register, kSimd128AfterLast> {
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<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)
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 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_
|
