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#include "ARMJIT_Compiler.h"
#include "../ARMInterpreter.h"
#include <assert.h>
using namespace Gen;
namespace ARMJIT
{
template <>
const X64Reg RegCache<Compiler, X64Reg>::NativeRegAllocOrder[] = {RBX, RSI, RDI, R12, R13};
template <>
const int RegCache<Compiler, X64Reg>::NativeRegsAvailable = 5;
Compiler::Compiler()
{
AllocCodeSpace(1024 * 1024 * 4);
}
void Compiler::LoadCPSR()
{
assert(!CPSRDirty);
MOV(32, R(RCPSR), MDisp(RCPU, offsetof(ARM, CPSR)));
}
void Compiler::SaveCPSR()
{
if (CPSRDirty)
{
MOV(32, MDisp(RCPU, offsetof(ARM, CPSR)), R(RCPSR));
CPSRDirty = false;
}
}
void Compiler::LoadReg(int reg, X64Reg nativeReg)
{
if (reg != 15)
MOV(32, R(nativeReg), MDisp(RCPU, offsetof(ARM, R[reg])));
else
MOV(32, R(nativeReg), Imm32(R15));
}
void Compiler::UnloadReg(int reg, X64Reg nativeReg)
{
MOV(32, MDisp(RCPU, offsetof(ARM, R[reg])), R(nativeReg));
}
CompiledBlock Compiler::CompileBlock(ARM* cpu, FetchedInstr instrs[], int instrsCount)
{
if (IsAlmostFull())
{
ResetBlocks();
ResetCodePtr();
}
CompiledBlock res = (CompiledBlock)GetWritableCodePtr();
ConstantCycles = 0;
Thumb = cpu->CPSR & 0x20;
Num = cpu->Num;
R15 = cpu->R[15];
ABI_PushRegistersAndAdjustStack({ABI_ALL_CALLEE_SAVED}, 8, 0);
MOV(64, R(RCPU), ImmPtr(cpu));
XOR(32, R(RCycles), R(RCycles));
LoadCPSR();
// TODO: this is ugly as a whole, do better
RegCache = ARMJIT::RegCache<Compiler, X64Reg>(this, instrs, instrsCount);
for (int i = 0; i < instrsCount; i++)
{
R15 += Thumb ? 2 : 4;
CurrentInstr = instrs[i];
CompileFunc comp = GetCompFunc(CurrentInstr.Info.Kind);
if (CurrentInstr.Info.Branches())
comp = NULL;
if (comp == NULL || i == instrsCount - 1)
{
MOV(32, MDisp(RCPU, offsetof(ARM, R[15])), Imm32(R15));
MOV(32, MDisp(RCPU, offsetof(ARM, CodeCycles)), Imm32(CurrentInstr.CodeCycles));
MOV(32, MDisp(RCPU, offsetof(ARM, CurInstr)), Imm32(CurrentInstr.Instr));
if (i == instrsCount - 1)
{
MOV(32, MDisp(RCPU, offsetof(ARM, NextInstr[0])), Imm32(CurrentInstr.NextInstr[0]));
MOV(32, MDisp(RCPU, offsetof(ARM, NextInstr[1])), Imm32(CurrentInstr.NextInstr[1]));
}
SaveCPSR();
}
if (comp != NULL)
RegCache.Prepare(i);
else
RegCache.Flush();
if (Thumb)
{
if (comp == NULL)
{
MOV(64, R(ABI_PARAM1), R(RCPU));
u32 icode = (CurrentInstr.Instr >> 6) & 0x3FF;
ABI_CallFunction(ARMInterpreter::THUMBInstrTable[icode]);
}
else
(this->*comp)();
}
else
{
u32 cond = CurrentInstr.Cond();
if (CurrentInstr.Info.Kind == ARMInstrInfo::ak_BLX_IMM)
{
MOV(64, R(ABI_PARAM1), R(RCPU));
ABI_CallFunction(ARMInterpreter::A_BLX_IMM);
}
else if (cond == 0xF)
Comp_AddCycles_C();
else
{
FixupBranch skipExecute;
if (cond < 0xE)
{
if (cond >= 0x8)
{
static_assert(RSCRATCH3 == ECX);
MOV(32, R(RSCRATCH3), R(RCPSR));
SHR(32, R(RSCRATCH3), Imm8(28));
MOV(32, R(RSCRATCH), Imm32(1));
SHL(32, R(RSCRATCH), R(RSCRATCH3));
TEST(32, R(RSCRATCH), Imm32(ARM::ConditionTable[cond]));
skipExecute = J_CC(CC_Z);
}
else
{
// could have used a LUT, but then where would be the fun?
BT(32, R(RCPSR), Imm8(28 + ((~(cond >> 1) & 1) << 1 | (cond >> 2 & 1) ^ (cond >> 1 & 1))));
skipExecute = J_CC(cond & 1 ? CC_C : CC_NC);
}
}
if (comp == NULL)
{
MOV(64, R(ABI_PARAM1), R(RCPU));
u32 icode = ((CurrentInstr.Instr >> 4) & 0xF) | ((CurrentInstr.Instr >> 16) & 0xFF0);
ABI_CallFunction(ARMInterpreter::ARMInstrTable[icode]);
}
else
(this->*comp)();
FixupBranch skipFailed;
if (CurrentInstr.Cond() < 0xE)
{
skipFailed = J();
SetJumpTarget(skipExecute);
Comp_AddCycles_C();
SetJumpTarget(skipFailed);
}
}
}
/*
we don't need to collect the interpreted cycles,
since all functions only add to it, the dispatcher
takes care of it.
*/
if (comp == NULL && i != instrsCount - 1)
LoadCPSR();
}
RegCache.Flush();
SaveCPSR();
LEA(32, RAX, MDisp(RCycles, ConstantCycles));
ABI_PopRegistersAndAdjustStack({ABI_ALL_CALLEE_SAVED}, 8, 0);
RET();
return res;
}
CompileFunc Compiler::GetCompFunc(int kind)
{
// this might look like waste of space, so many repeatitions, but it's invaluable for debugging.
// see ARMInstrInfo.h for the order
const CompileFunc A_Comp[ARMInstrInfo::ak_Count] =
{
// AND
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// EOR
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// SUB
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// RSB
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// ADD
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// ADC
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// SBC
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// RSC
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// ORR
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// MOV
A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp,
A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp,
// BIC
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith, A_Comp_Arith,
// MVN
A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp,
A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp, A_Comp_MovOp,
// TST
A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp,
// TEQ
A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp,
// CMP
A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp,
// CMN
A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp, A_Comp_CmpOp,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
};
const CompileFunc T_Comp[ARMInstrInfo::tk_Count] = {
// Shift imm
T_Comp_ShiftImm, T_Comp_ShiftImm, T_Comp_ShiftImm,
// Three operand ADD/SUB
T_Comp_AddSub_, T_Comp_AddSub_, T_Comp_AddSub_, T_Comp_AddSub_,
// 8 bit imm
T_Comp_ALU_Imm8, T_Comp_ALU_Imm8, T_Comp_ALU_Imm8, T_Comp_ALU_Imm8,
// general ALU
T_Comp_ALU, T_Comp_ALU, T_Comp_ALU, T_Comp_ALU,
T_Comp_ALU, T_Comp_ALU, T_Comp_ALU, T_Comp_ALU,
T_Comp_ALU, T_Comp_ALU, T_Comp_ALU, T_Comp_ALU,
T_Comp_ALU, NULL, T_Comp_ALU, T_Comp_ALU,
// hi reg
T_Comp_ALU_HiReg, T_Comp_ALU_HiReg, T_Comp_ALU_HiReg,
// pc/sp relative
NULL, NULL, NULL,
// mem...
NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL
};
return Thumb ? T_Comp[kind] : A_Comp[kind];
}
void Compiler::Comp_AddCycles_C()
{
s32 cycles = Num ?
NDS::ARM7MemTimings[CurrentInstr.CodeCycles][Thumb ? 1 : 3]
: ((R15 & 0x2) ? 0 : CurrentInstr.CodeCycles);
if (CurrentInstr.Cond() < 0xE)
ADD(32, R(RCycles), Imm8(cycles));
else
ConstantCycles += cycles;
}
void Compiler::Comp_AddCycles_CI(u32 i)
{
s32 cycles = (Num ?
NDS::ARM7MemTimings[CurrentInstr.CodeCycles][Thumb ? 0 : 2]
: ((R15 & 0x2) ? 0 : CurrentInstr.CodeCycles)) + i;
if (CurrentInstr.Cond() < 0xE)
ADD(32, R(RCycles), Imm8(cycles));
else
ConstantCycles += cycles;
}
}
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