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ryujinx-final/ARMeilleure/CodeGen/Arm64/CodeGenerator.cs
gdkchan 5e0f8e8738
Implement JIT Arm64 backend (#4114)
* Implement JIT Arm64 backend

* PPTC version bump

* Address some feedback from Arm64 JIT PR

* Address even more PR feedback

* Remove unused IsPageAligned function

* Sync Qc flag before calls

* Fix comment and remove unused enum

* Address riperiperi PR feedback

* Delete Breakpoint IR instruction that was only implemented for Arm64
2023-01-10 19:16:59 -03:00

1576 lines
No EOL
56 KiB
C#

using ARMeilleure.CodeGen.Linking;
using ARMeilleure.CodeGen.Optimizations;
using ARMeilleure.CodeGen.RegisterAllocators;
using ARMeilleure.CodeGen.Unwinding;
using ARMeilleure.Common;
using ARMeilleure.Diagnostics;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.Translation;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Numerics;
using static ARMeilleure.IntermediateRepresentation.Operand;
using static ARMeilleure.IntermediateRepresentation.Operand.Factory;
namespace ARMeilleure.CodeGen.Arm64
{
static class CodeGenerator
{
private const int DWordScale = 3;
private const int RegistersCount = 32;
private const int FpRegister = 29;
private const int LrRegister = 30;
private const int SpRegister = 31;
private const int ZrRegister = 31;
private enum AccessSize
{
Byte,
Hword,
Auto
}
private static Action<CodeGenContext, Operation>[] _instTable;
static CodeGenerator()
{
_instTable = new Action<CodeGenContext, Operation>[EnumUtils.GetCount(typeof(Instruction))];
Add(Instruction.Add, GenerateAdd);
Add(Instruction.BitwiseAnd, GenerateBitwiseAnd);
Add(Instruction.BitwiseExclusiveOr, GenerateBitwiseExclusiveOr);
Add(Instruction.BitwiseNot, GenerateBitwiseNot);
Add(Instruction.BitwiseOr, GenerateBitwiseOr);
Add(Instruction.BranchIf, GenerateBranchIf);
Add(Instruction.ByteSwap, GenerateByteSwap);
Add(Instruction.Call, GenerateCall);
//Add(Instruction.Clobber, GenerateClobber);
Add(Instruction.Compare, GenerateCompare);
Add(Instruction.CompareAndSwap, GenerateCompareAndSwap);
Add(Instruction.CompareAndSwap16, GenerateCompareAndSwap16);
Add(Instruction.CompareAndSwap8, GenerateCompareAndSwap8);
Add(Instruction.ConditionalSelect, GenerateConditionalSelect);
Add(Instruction.ConvertI64ToI32, GenerateConvertI64ToI32);
Add(Instruction.ConvertToFP, GenerateConvertToFP);
Add(Instruction.ConvertToFPUI, GenerateConvertToFPUI);
Add(Instruction.Copy, GenerateCopy);
Add(Instruction.CountLeadingZeros, GenerateCountLeadingZeros);
Add(Instruction.Divide, GenerateDivide);
Add(Instruction.DivideUI, GenerateDivideUI);
Add(Instruction.Fill, GenerateFill);
Add(Instruction.Load, GenerateLoad);
Add(Instruction.Load16, GenerateLoad16);
Add(Instruction.Load8, GenerateLoad8);
Add(Instruction.MemoryBarrier, GenerateMemoryBarrier);
Add(Instruction.Multiply, GenerateMultiply);
Add(Instruction.Multiply64HighSI, GenerateMultiply64HighSI);
Add(Instruction.Multiply64HighUI, GenerateMultiply64HighUI);
Add(Instruction.Negate, GenerateNegate);
Add(Instruction.Return, GenerateReturn);
Add(Instruction.RotateRight, GenerateRotateRight);
Add(Instruction.ShiftLeft, GenerateShiftLeft);
Add(Instruction.ShiftRightSI, GenerateShiftRightSI);
Add(Instruction.ShiftRightUI, GenerateShiftRightUI);
Add(Instruction.SignExtend16, GenerateSignExtend16);
Add(Instruction.SignExtend32, GenerateSignExtend32);
Add(Instruction.SignExtend8, GenerateSignExtend8);
Add(Instruction.Spill, GenerateSpill);
Add(Instruction.SpillArg, GenerateSpillArg);
Add(Instruction.StackAlloc, GenerateStackAlloc);
Add(Instruction.Store, GenerateStore);
Add(Instruction.Store16, GenerateStore16);
Add(Instruction.Store8, GenerateStore8);
Add(Instruction.Subtract, GenerateSubtract);
Add(Instruction.Tailcall, GenerateTailcall);
Add(Instruction.VectorCreateScalar, GenerateVectorCreateScalar);
Add(Instruction.VectorExtract, GenerateVectorExtract);
Add(Instruction.VectorExtract16, GenerateVectorExtract16);
Add(Instruction.VectorExtract8, GenerateVectorExtract8);
Add(Instruction.VectorInsert, GenerateVectorInsert);
Add(Instruction.VectorInsert16, GenerateVectorInsert16);
Add(Instruction.VectorInsert8, GenerateVectorInsert8);
Add(Instruction.VectorOne, GenerateVectorOne);
Add(Instruction.VectorZero, GenerateVectorZero);
Add(Instruction.VectorZeroUpper64, GenerateVectorZeroUpper64);
Add(Instruction.VectorZeroUpper96, GenerateVectorZeroUpper96);
Add(Instruction.ZeroExtend16, GenerateZeroExtend16);
Add(Instruction.ZeroExtend32, GenerateZeroExtend32);
Add(Instruction.ZeroExtend8, GenerateZeroExtend8);
static void Add(Instruction inst, Action<CodeGenContext, Operation> func)
{
_instTable[(int)inst] = func;
}
}
public static CompiledFunction Generate(CompilerContext cctx)
{
ControlFlowGraph cfg = cctx.Cfg;
Logger.StartPass(PassName.Optimization);
if (cctx.Options.HasFlag(CompilerOptions.Optimize))
{
if (cctx.Options.HasFlag(CompilerOptions.SsaForm))
{
Optimizer.RunPass(cfg);
}
BlockPlacement.RunPass(cfg);
}
Arm64Optimizer.RunPass(cfg);
Logger.EndPass(PassName.Optimization, cfg);
Logger.StartPass(PassName.PreAllocation);
StackAllocator stackAlloc = new();
PreAllocator.RunPass(cctx, stackAlloc, out int maxCallArgs);
Logger.EndPass(PassName.PreAllocation, cfg);
Logger.StartPass(PassName.RegisterAllocation);
if (cctx.Options.HasFlag(CompilerOptions.SsaForm))
{
Ssa.Deconstruct(cfg);
}
IRegisterAllocator regAlloc;
if (cctx.Options.HasFlag(CompilerOptions.Lsra))
{
regAlloc = new LinearScanAllocator();
}
else
{
regAlloc = new HybridAllocator();
}
RegisterMasks regMasks = new(
CallingConvention.GetIntAvailableRegisters(),
CallingConvention.GetVecAvailableRegisters(),
CallingConvention.GetIntCallerSavedRegisters(),
CallingConvention.GetVecCallerSavedRegisters(),
CallingConvention.GetIntCalleeSavedRegisters(),
CallingConvention.GetVecCalleeSavedRegisters(),
RegistersCount);
AllocationResult allocResult = regAlloc.RunPass(cfg, stackAlloc, regMasks);
Logger.EndPass(PassName.RegisterAllocation, cfg);
Logger.StartPass(PassName.CodeGeneration);
//Console.Error.WriteLine(IRDumper.GetDump(cfg));
bool relocatable = (cctx.Options & CompilerOptions.Relocatable) != 0;
CodeGenContext context = new(allocResult, maxCallArgs, cfg.Blocks.Count, relocatable);
UnwindInfo unwindInfo = WritePrologue(context);
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
context.EnterBlock(block);
for (Operation node = block.Operations.First; node != default;)
{
node = GenerateOperation(context, node);
}
if (block.SuccessorsCount == 0)
{
// The only blocks which can have 0 successors are exit blocks.
Operation last = block.Operations.Last;
Debug.Assert(last.Instruction == Instruction.Tailcall ||
last.Instruction == Instruction.Return);
}
else
{
BasicBlock succ = block.GetSuccessor(0);
if (succ != block.ListNext)
{
context.JumpTo(succ);
}
}
}
(byte[] code, RelocInfo relocInfo) = context.GetCode();
Logger.EndPass(PassName.CodeGeneration);
return new CompiledFunction(code, unwindInfo, relocInfo);
}
private static Operation GenerateOperation(CodeGenContext context, Operation operation)
{
if (operation.Instruction == Instruction.Extended)
{
CodeGeneratorIntrinsic.GenerateOperation(context, operation);
}
else
{
if (IsLoadOrStore(operation) &&
operation.ListNext != default &&
operation.ListNext.Instruction == operation.Instruction &&
TryPairMemoryOp(context, operation, operation.ListNext))
{
// Skip next operation if we managed to pair them.
return operation.ListNext.ListNext;
}
Action<CodeGenContext, Operation> func = _instTable[(int)operation.Instruction];
if (func != null)
{
func(context, operation);
}
else
{
throw new ArgumentException($"Invalid instruction \"{operation.Instruction}\".");
}
}
return operation.ListNext;
}
private static void GenerateAdd(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
// ValidateBinOp(dest, src1, src2);
if (dest.Type.IsInteger())
{
context.Assembler.Add(dest, src1, src2);
}
else
{
context.Assembler.FaddScalar(dest, src1, src2);
}
}
private static void GenerateBitwiseAnd(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
ValidateBinOp(dest, src1, src2);
Debug.Assert(dest.Type.IsInteger());
context.Assembler.And(dest, src1, src2);
}
private static void GenerateBitwiseExclusiveOr(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
ValidateBinOp(dest, src1, src2);
if (dest.Type.IsInteger())
{
context.Assembler.Eor(dest, src1, src2);
}
else
{
context.Assembler.EorVector(dest, src1, src2);
}
}
private static void GenerateBitwiseNot(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
ValidateUnOp(dest, source);
Debug.Assert(dest.Type.IsInteger());
context.Assembler.Mvn(dest, source);
}
private static void GenerateBitwiseOr(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
ValidateBinOp(dest, src1, src2);
Debug.Assert(dest.Type.IsInteger());
context.Assembler.Orr(dest, src1, src2);
}
private static void GenerateBranchIf(CodeGenContext context, Operation operation)
{
Operand comp = operation.GetSource(2);
Debug.Assert(comp.Kind == OperandKind.Constant);
var cond = ((Comparison)comp.AsInt32()).ToArmCondition();
GenerateCompareCommon(context, operation);
context.JumpTo(cond, context.CurrBlock.GetSuccessor(1));
}
private static void GenerateByteSwap(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
ValidateUnOp(dest, source);
Debug.Assert(dest.Type.IsInteger());
context.Assembler.Rev(dest, source);
}
private static void GenerateCall(CodeGenContext context, Operation operation)
{
context.Assembler.Blr(operation.GetSource(0));
}
private static void GenerateCompare(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand comp = operation.GetSource(2);
Debug.Assert(dest.Type == OperandType.I32);
Debug.Assert(comp.Kind == OperandKind.Constant);
var cond = ((Comparison)comp.AsInt32()).ToArmCondition();
GenerateCompareCommon(context, operation);
context.Assembler.Cset(dest, cond);
}
private static void GenerateCompareAndSwap(CodeGenContext context, Operation operation)
{
if (operation.SourcesCount == 5) // CompareAndSwap128 has 5 sources, compared to CompareAndSwap64/32's 3.
{
Operand actualLow = operation.GetDestination(0);
Operand actualHigh = operation.GetDestination(1);
Operand temp0 = operation.GetDestination(2);
Operand temp1 = operation.GetDestination(3);
Operand address = operation.GetSource(0);
Operand expectedLow = operation.GetSource(1);
Operand expectedHigh = operation.GetSource(2);
Operand desiredLow = operation.GetSource(3);
Operand desiredHigh = operation.GetSource(4);
GenerateAtomicDcas(
context,
address,
expectedLow,
expectedHigh,
desiredLow,
desiredHigh,
actualLow,
actualHigh,
temp0,
temp1);
}
else
{
Operand actual = operation.GetDestination(0);
Operand result = operation.GetDestination(1);
Operand address = operation.GetSource(0);
Operand expected = operation.GetSource(1);
Operand desired = operation.GetSource(2);
GenerateAtomicCas(context, address, expected, desired, actual, result, AccessSize.Auto);
}
}
private static void GenerateCompareAndSwap16(CodeGenContext context, Operation operation)
{
Operand actual = operation.GetDestination(0);
Operand result = operation.GetDestination(1);
Operand address = operation.GetSource(0);
Operand expected = operation.GetSource(1);
Operand desired = operation.GetSource(2);
GenerateAtomicCas(context, address, expected, desired, actual, result, AccessSize.Hword);
}
private static void GenerateCompareAndSwap8(CodeGenContext context, Operation operation)
{
Operand actual = operation.GetDestination(0);
Operand result = operation.GetDestination(1);
Operand address = operation.GetSource(0);
Operand expected = operation.GetSource(1);
Operand desired = operation.GetSource(2);
GenerateAtomicCas(context, address, expected, desired, actual, result, AccessSize.Byte);
}
private static void GenerateCompareCommon(CodeGenContext context, Operation operation)
{
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
EnsureSameType(src1, src2);
Debug.Assert(src1.Type.IsInteger());
context.Assembler.Cmp(src1, src2);
}
private static void GenerateConditionalSelect(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
Operand src3 = operation.GetSource(2);
EnsureSameType(dest, src2, src3);
Debug.Assert(dest.Type.IsInteger());
Debug.Assert(src1.Type == OperandType.I32);
context.Assembler.Cmp (src1, Const(src1.Type, 0));
context.Assembler.Csel(dest, src2, src3, ArmCondition.Ne);
}
private static void GenerateConvertI64ToI32(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type == OperandType.I32 && source.Type == OperandType.I64);
context.Assembler.Mov(dest, Register(source, OperandType.I32));
}
private static void GenerateConvertToFP(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type == OperandType.FP32 || dest.Type == OperandType.FP64);
Debug.Assert(dest.Type != source.Type);
Debug.Assert(source.Type != OperandType.V128);
if (source.Type.IsInteger())
{
context.Assembler.ScvtfScalar(dest, source);
}
else
{
context.Assembler.FcvtScalar(dest, source);
}
}
private static void GenerateConvertToFPUI(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type == OperandType.FP32 || dest.Type == OperandType.FP64);
Debug.Assert(dest.Type != source.Type);
Debug.Assert(source.Type.IsInteger());
context.Assembler.UcvtfScalar(dest, source);
}
private static void GenerateCopy(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
EnsureSameType(dest, source);
Debug.Assert(dest.Type.IsInteger() || source.Kind != OperandKind.Constant);
// Moves to the same register are useless.
if (dest.Kind == source.Kind && dest.Value == source.Value)
{
return;
}
if (dest.Kind == OperandKind.Register && source.Kind == OperandKind.Constant)
{
if (source.Relocatable)
{
context.ReserveRelocatableConstant(dest, source.Symbol, source.Value);
}
else
{
GenerateConstantCopy(context, dest, source.Value);
}
}
else
{
context.Assembler.Mov(dest, source);
}
}
private static void GenerateCountLeadingZeros(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
EnsureSameType(dest, source);
Debug.Assert(dest.Type.IsInteger());
context.Assembler.Clz(dest, source);
}
private static void GenerateDivide(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand dividend = operation.GetSource(0);
Operand divisor = operation.GetSource(1);
ValidateBinOp(dest, dividend, divisor);
if (dest.Type.IsInteger())
{
context.Assembler.Sdiv(dest, dividend, divisor);
}
else
{
context.Assembler.FdivScalar(dest, dividend, divisor);
}
}
private static void GenerateDivideUI(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand dividend = operation.GetSource(0);
Operand divisor = operation.GetSource(1);
ValidateBinOp(dest, dividend, divisor);
context.Assembler.Udiv(dest, dividend, divisor);
}
private static void GenerateLoad(CodeGenContext context, Operation operation)
{
Operand value = operation.Destination;
Operand address = operation.GetSource(0);
context.Assembler.Ldr(value, address);
}
private static void GenerateLoad16(CodeGenContext context, Operation operation)
{
Operand value = operation.Destination;
Operand address = operation.GetSource(0);
Debug.Assert(value.Type.IsInteger());
context.Assembler.LdrhRiUn(value, address, 0);
}
private static void GenerateLoad8(CodeGenContext context, Operation operation)
{
Operand value = operation.Destination;
Operand address = operation.GetSource(0);
Debug.Assert(value.Type.IsInteger());
context.Assembler.LdrbRiUn(value, address, 0);
}
private static void GenerateMemoryBarrier(CodeGenContext context, Operation operation)
{
context.Assembler.Dmb(0xf);
}
private static void GenerateMultiply(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
EnsureSameType(dest, src1, src2);
if (dest.Type.IsInteger())
{
context.Assembler.Mul(dest, src1, src2);
}
else
{
context.Assembler.FmulScalar(dest, src1, src2);
}
}
private static void GenerateMultiply64HighSI(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
EnsureSameType(dest, src1, src2);
Debug.Assert(dest.Type == OperandType.I64);
context.Assembler.Smulh(dest, src1, src2);
}
private static void GenerateMultiply64HighUI(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
EnsureSameType(dest, src1, src2);
Debug.Assert(dest.Type == OperandType.I64);
context.Assembler.Umulh(dest, src1, src2);
}
private static void GenerateNegate(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
ValidateUnOp(dest, source);
if (dest.Type.IsInteger())
{
context.Assembler.Neg(dest, source);
}
else
{
context.Assembler.FnegScalar(dest, source);
}
}
private static void GenerateLoad(CodeGenContext context, Operand value, Operand address, int offset)
{
if (CodeGenCommon.ConstFitsOnUImm12(offset, value.Type))
{
context.Assembler.LdrRiUn(value, address, offset);
}
else if (CodeGenCommon.ConstFitsOnSImm9(offset))
{
context.Assembler.Ldur(value, address, offset);
}
else
{
Operand tempAddress = Register(CodeGenCommon.ReservedRegister);
GenerateConstantCopy(context, tempAddress, (ulong)offset);
context.Assembler.Add(tempAddress, address, tempAddress, ArmExtensionType.Uxtx); // Address might be SP and must be the first input.
context.Assembler.LdrRiUn(value, tempAddress, 0);
}
}
private static void GenerateReturn(CodeGenContext context, Operation operation)
{
WriteEpilogue(context);
context.Assembler.Ret(Register(LrRegister));
}
private static void GenerateRotateRight(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
ValidateShift(dest, src1, src2);
context.Assembler.Ror(dest, src1, src2);
}
private static void GenerateShiftLeft(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
ValidateShift(dest, src1, src2);
context.Assembler.Lsl(dest, src1, src2);
}
private static void GenerateShiftRightSI(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
ValidateShift(dest, src1, src2);
context.Assembler.Asr(dest, src1, src2);
}
private static void GenerateShiftRightUI(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
ValidateShift(dest, src1, src2);
context.Assembler.Lsr(dest, src1, src2);
}
private static void GenerateSignExtend16(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type.IsInteger() && source.Type.IsInteger());
context.Assembler.Sxth(dest, source);
}
private static void GenerateSignExtend32(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type.IsInteger() && source.Type.IsInteger());
context.Assembler.Sxtw(dest, source);
}
private static void GenerateSignExtend8(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type.IsInteger() && source.Type.IsInteger());
context.Assembler.Sxtb(dest, source);
}
private static void GenerateFill(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand offset = operation.GetSource(0);
Debug.Assert(offset.Kind == OperandKind.Constant);
int offs = offset.AsInt32() + context.CallArgsRegionSize + context.FpLrSaveRegionSize;
GenerateLoad(context, dest, Register(SpRegister), offs);
}
private static void GenerateStore(CodeGenContext context, Operand value, Operand address, int offset)
{
if (CodeGenCommon.ConstFitsOnUImm12(offset, value.Type))
{
context.Assembler.StrRiUn(value, address, offset);
}
else if (CodeGenCommon.ConstFitsOnSImm9(offset))
{
context.Assembler.Stur(value, address, offset);
}
else
{
Operand tempAddress = Register(CodeGenCommon.ReservedRegister);
GenerateConstantCopy(context, tempAddress, (ulong)offset);
context.Assembler.Add(tempAddress, address, tempAddress, ArmExtensionType.Uxtx); // Address might be SP and must be the first input.
context.Assembler.StrRiUn(value, tempAddress, 0);
}
}
private static void GenerateSpill(CodeGenContext context, Operation operation)
{
GenerateSpill(context, operation, context.CallArgsRegionSize + context.FpLrSaveRegionSize);
}
private static void GenerateSpillArg(CodeGenContext context, Operation operation)
{
GenerateSpill(context, operation, 0);
}
private static void GenerateStackAlloc(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand offset = operation.GetSource(0);
Debug.Assert(offset.Kind == OperandKind.Constant);
int offs = offset.AsInt32() + context.CallArgsRegionSize + context.FpLrSaveRegionSize;
context.Assembler.Add(dest, Register(SpRegister), Const(dest.Type, offs));
}
private static void GenerateStore(CodeGenContext context, Operation operation)
{
Operand value = operation.GetSource(1);
Operand address = operation.GetSource(0);
context.Assembler.Str(value, address);
}
private static void GenerateStore16(CodeGenContext context, Operation operation)
{
Operand value = operation.GetSource(1);
Operand address = operation.GetSource(0);
Debug.Assert(value.Type.IsInteger());
context.Assembler.StrhRiUn(value, address, 0);
}
private static void GenerateStore8(CodeGenContext context, Operation operation)
{
Operand value = operation.GetSource(1);
Operand address = operation.GetSource(0);
Debug.Assert(value.Type.IsInteger());
context.Assembler.StrbRiUn(value, address, 0);
}
private static void GenerateSpill(CodeGenContext context, Operation operation, int baseOffset)
{
Operand offset = operation.GetSource(0);
Operand source = operation.GetSource(1);
Debug.Assert(offset.Kind == OperandKind.Constant);
int offs = offset.AsInt32() + baseOffset;
GenerateStore(context, source, Register(SpRegister), offs);
}
private static void GenerateSubtract(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
// ValidateBinOp(dest, src1, src2);
if (dest.Type.IsInteger())
{
context.Assembler.Sub(dest, src1, src2);
}
else
{
context.Assembler.FsubScalar(dest, src1, src2);
}
}
private static void GenerateTailcall(CodeGenContext context, Operation operation)
{
WriteEpilogue(context);
context.Assembler.Br(operation.GetSource(0));
}
private static void GenerateVectorCreateScalar(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
if (dest != default)
{
Debug.Assert(!dest.Type.IsInteger() && source.Type.IsInteger());
OperandType destType = source.Type == OperandType.I64 ? OperandType.FP64 : OperandType.FP32;
context.Assembler.Fmov(Register(dest, destType), source, topHalf: false);
}
}
private static void GenerateVectorExtract(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination; // Value
Operand src1 = operation.GetSource(0); // Vector
Operand src2 = operation.GetSource(1); // Index
Debug.Assert(src1.Type == OperandType.V128);
Debug.Assert(src2.Kind == OperandKind.Constant);
byte index = src2.AsByte();
Debug.Assert(index < OperandType.V128.GetSizeInBytes() / dest.Type.GetSizeInBytes());
if (dest.Type.IsInteger())
{
context.Assembler.Umov(dest, src1, index, dest.Type == OperandType.I64 ? 3 : 2);
}
else
{
context.Assembler.DupScalar(dest, src1, index, dest.Type == OperandType.FP64 ? 3 : 2);
}
}
private static void GenerateVectorExtract16(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination; // Value
Operand src1 = operation.GetSource(0); // Vector
Operand src2 = operation.GetSource(1); // Index
Debug.Assert(src1.Type == OperandType.V128);
Debug.Assert(src2.Kind == OperandKind.Constant);
byte index = src2.AsByte();
Debug.Assert(index < 8);
context.Assembler.Umov(dest, src1, index, 1);
}
private static void GenerateVectorExtract8(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination; // Value
Operand src1 = operation.GetSource(0); // Vector
Operand src2 = operation.GetSource(1); // Index
Debug.Assert(src1.Type == OperandType.V128);
Debug.Assert(src2.Kind == OperandKind.Constant);
byte index = src2.AsByte();
Debug.Assert(index < 16);
context.Assembler.Umov(dest, src1, index, 0);
}
private static void GenerateVectorInsert(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0); // Vector
Operand src2 = operation.GetSource(1); // Value
Operand src3 = operation.GetSource(2); // Index
EnsureSameReg(dest, src1);
Debug.Assert(src1.Type == OperandType.V128);
Debug.Assert(src3.Kind == OperandKind.Constant);
byte index = src3.AsByte();
if (src2.Type.IsInteger())
{
context.Assembler.Ins(dest, src2, index, src2.Type == OperandType.I64 ? 3 : 2);
}
else
{
context.Assembler.Ins(dest, src2, 0, index, src2.Type == OperandType.FP64 ? 3 : 2);
}
}
private static void GenerateVectorInsert16(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0); // Vector
Operand src2 = operation.GetSource(1); // Value
Operand src3 = operation.GetSource(2); // Index
EnsureSameReg(dest, src1);
Debug.Assert(src1.Type == OperandType.V128);
Debug.Assert(src3.Kind == OperandKind.Constant);
byte index = src3.AsByte();
context.Assembler.Ins(dest, src2, index, 1);
}
private static void GenerateVectorInsert8(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0); // Vector
Operand src2 = operation.GetSource(1); // Value
Operand src3 = operation.GetSource(2); // Index
EnsureSameReg(dest, src1);
Debug.Assert(src1.Type == OperandType.V128);
Debug.Assert(src3.Kind == OperandKind.Constant);
byte index = src3.AsByte();
context.Assembler.Ins(dest, src2, index, 0);
}
private static void GenerateVectorOne(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Debug.Assert(!dest.Type.IsInteger());
context.Assembler.CmeqVector(dest, dest, dest, 2);
}
private static void GenerateVectorZero(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Debug.Assert(!dest.Type.IsInteger());
context.Assembler.EorVector(dest, dest, dest);
}
private static void GenerateVectorZeroUpper64(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type == OperandType.V128 && source.Type == OperandType.V128);
context.Assembler.Fmov(Register(dest, OperandType.FP64), Register(source, OperandType.FP64));
}
private static void GenerateVectorZeroUpper96(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type == OperandType.V128 && source.Type == OperandType.V128);
context.Assembler.Fmov(Register(dest, OperandType.FP32), Register(source, OperandType.FP32));
}
private static void GenerateZeroExtend16(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type.IsInteger() && source.Type.IsInteger());
context.Assembler.Uxth(dest, source);
}
private static void GenerateZeroExtend32(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type.IsInteger() && source.Type.IsInteger());
// We can eliminate the move if source is already 32-bit and the registers are the same.
if (dest.Value == source.Value && source.Type == OperandType.I32)
{
return;
}
context.Assembler.Mov(Register(dest.GetRegister().Index, OperandType.I32), source);
}
private static void GenerateZeroExtend8(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type.IsInteger() && source.Type.IsInteger());
context.Assembler.Uxtb(dest, source);
}
private static UnwindInfo WritePrologue(CodeGenContext context)
{
List<UnwindPushEntry> pushEntries = new List<UnwindPushEntry>();
Operand rsp = Register(SpRegister);
int intMask = CallingConvention.GetIntCalleeSavedRegisters() & context.AllocResult.IntUsedRegisters;
int vecMask = CallingConvention.GetFpCalleeSavedRegisters() & context.AllocResult.VecUsedRegisters;
int intCalleeSavedRegsCount = BitOperations.PopCount((uint)intMask);
int vecCalleeSavedRegsCount = BitOperations.PopCount((uint)vecMask);
int calleeSaveRegionSize = Align16(intCalleeSavedRegsCount * 8 + vecCalleeSavedRegsCount * 8);
int offset = 0;
WritePrologueCalleeSavesPreIndexed(context, pushEntries, ref intMask, ref offset, calleeSaveRegionSize, OperandType.I64);
WritePrologueCalleeSavesPreIndexed(context, pushEntries, ref vecMask, ref offset, calleeSaveRegionSize, OperandType.FP64);
int localSize = Align16(context.AllocResult.SpillRegionSize + context.FpLrSaveRegionSize);
int outArgsSize = context.CallArgsRegionSize;
if (CodeGenCommon.ConstFitsOnSImm7(localSize, DWordScale))
{
if (context.HasCall)
{
context.Assembler.StpRiPre(Register(FpRegister), Register(LrRegister), rsp, -localSize);
context.Assembler.MovSp(Register(FpRegister), rsp);
}
if (outArgsSize != 0)
{
context.Assembler.Sub(rsp, rsp, Const(OperandType.I64, outArgsSize));
}
}
else
{
int frameSize = localSize + outArgsSize;
if (frameSize != 0)
{
if (CodeGenCommon.ConstFitsOnUImm12(frameSize))
{
context.Assembler.Sub(rsp, rsp, Const(OperandType.I64, frameSize));
}
else
{
Operand tempSize = Register(CodeGenCommon.ReservedRegister);
GenerateConstantCopy(context, tempSize, (ulong)frameSize);
context.Assembler.Sub(rsp, rsp, tempSize, ArmExtensionType.Uxtx);
}
}
context.Assembler.StpRiUn(Register(FpRegister), Register(LrRegister), rsp, outArgsSize);
if (outArgsSize != 0)
{
context.Assembler.Add(Register(FpRegister), Register(SpRegister), Const(OperandType.I64, outArgsSize));
}
else
{
context.Assembler.MovSp(Register(FpRegister), Register(SpRegister));
}
}
return new UnwindInfo(pushEntries.ToArray(), context.StreamOffset);
}
private static void WritePrologueCalleeSavesPreIndexed(
CodeGenContext context,
List<UnwindPushEntry> pushEntries,
ref int mask,
ref int offset,
int calleeSaveRegionSize,
OperandType type)
{
if ((BitOperations.PopCount((uint)mask) & 1) != 0)
{
int reg = BitOperations.TrailingZeroCount(mask);
pushEntries.Add(new UnwindPushEntry(UnwindPseudoOp.PushReg, context.StreamOffset, regIndex: reg));
mask &= ~(1 << reg);
if (offset != 0)
{
context.Assembler.StrRiUn(Register(reg, type), Register(SpRegister), offset);
}
else
{
context.Assembler.StrRiPre(Register(reg, type), Register(SpRegister), -calleeSaveRegionSize);
}
offset += type.GetSizeInBytes();
}
while (mask != 0)
{
int reg = BitOperations.TrailingZeroCount(mask);
pushEntries.Add(new UnwindPushEntry(UnwindPseudoOp.PushReg, context.StreamOffset, regIndex: reg));
mask &= ~(1 << reg);
int reg2 = BitOperations.TrailingZeroCount(mask);
pushEntries.Add(new UnwindPushEntry(UnwindPseudoOp.PushReg, context.StreamOffset, regIndex: reg2));
mask &= ~(1 << reg2);
if (offset != 0)
{
context.Assembler.StpRiUn(Register(reg, type), Register(reg2, type), Register(SpRegister), offset);
}
else
{
context.Assembler.StpRiPre(Register(reg, type), Register(reg2, type), Register(SpRegister), -calleeSaveRegionSize);
}
offset += type.GetSizeInBytes() * 2;
}
}
private static void WriteEpilogue(CodeGenContext context)
{
Operand rsp = Register(SpRegister);
int localSize = Align16(context.AllocResult.SpillRegionSize + context.FpLrSaveRegionSize);
int outArgsSize = context.CallArgsRegionSize;
if (CodeGenCommon.ConstFitsOnSImm7(localSize, DWordScale))
{
if (outArgsSize != 0)
{
context.Assembler.Add(rsp, rsp, Const(OperandType.I64, outArgsSize));
}
if (context.HasCall)
{
context.Assembler.LdpRiPost(Register(FpRegister), Register(LrRegister), rsp, localSize);
}
}
else
{
if (context.HasCall)
{
context.Assembler.LdpRiUn(Register(FpRegister), Register(LrRegister), rsp, outArgsSize);
}
int frameSize = localSize + outArgsSize;
if (frameSize != 0)
{
if (CodeGenCommon.ConstFitsOnUImm12(frameSize))
{
context.Assembler.Add(rsp, rsp, Const(OperandType.I64, frameSize));
}
else
{
Operand tempSize = Register(CodeGenCommon.ReservedRegister);
GenerateConstantCopy(context, tempSize, (ulong)frameSize);
context.Assembler.Add(rsp, rsp, tempSize, ArmExtensionType.Uxtx);
}
}
}
int intMask = CallingConvention.GetIntCalleeSavedRegisters() & context.AllocResult.IntUsedRegisters;
int vecMask = CallingConvention.GetFpCalleeSavedRegisters() & context.AllocResult.VecUsedRegisters;
int intCalleeSavedRegsCount = BitOperations.PopCount((uint)intMask);
int vecCalleeSavedRegsCount = BitOperations.PopCount((uint)vecMask);
int offset = intCalleeSavedRegsCount * 8 + vecCalleeSavedRegsCount * 8;
int calleeSaveRegionSize = Align16(offset);
WriteEpilogueCalleeSavesPostIndexed(context, ref vecMask, ref offset, calleeSaveRegionSize, OperandType.FP64);
WriteEpilogueCalleeSavesPostIndexed(context, ref intMask, ref offset, calleeSaveRegionSize, OperandType.I64);
}
private static void WriteEpilogueCalleeSavesPostIndexed(
CodeGenContext context,
ref int mask,
ref int offset,
int calleeSaveRegionSize,
OperandType type)
{
while (mask != 0)
{
int reg = BitUtils.HighestBitSet(mask);
mask &= ~(1 << reg);
if (mask != 0)
{
int reg2 = BitUtils.HighestBitSet(mask);
mask &= ~(1 << reg2);
offset -= type.GetSizeInBytes() * 2;
if (offset != 0)
{
context.Assembler.LdpRiUn(Register(reg2, type), Register(reg, type), Register(SpRegister), offset);
}
else
{
context.Assembler.LdpRiPost(Register(reg2, type), Register(reg, type), Register(SpRegister), calleeSaveRegionSize);
}
}
else
{
offset -= type.GetSizeInBytes();
if (offset != 0)
{
context.Assembler.LdrRiUn(Register(reg, type), Register(SpRegister), offset);
}
else
{
context.Assembler.LdrRiPost(Register(reg, type), Register(SpRegister), calleeSaveRegionSize);
}
}
}
}
private static void GenerateConstantCopy(CodeGenContext context, Operand dest, ulong value)
{
if (value != 0)
{
int hw = 0;
bool first = true;
while (value != 0)
{
int valueLow = (ushort)value;
if (valueLow != 0)
{
if (first)
{
context.Assembler.Movz(dest, valueLow, hw);
first = false;
}
else
{
context.Assembler.Movk(dest, valueLow, hw);
}
}
hw++;
value >>= 16;
}
}
else
{
context.Assembler.Mov(dest, Register(ZrRegister, dest.Type));
}
}
private static void GenerateAtomicCas(
CodeGenContext context,
Operand address,
Operand expected,
Operand desired,
Operand actual,
Operand result,
AccessSize accessSize)
{
int startOffset = context.StreamOffset;
switch (accessSize)
{
case AccessSize.Byte:
context.Assembler.Ldaxrb(actual, address);
break;
case AccessSize.Hword:
context.Assembler.Ldaxrh(actual, address);
break;
default:
context.Assembler.Ldaxr(actual, address);
break;
}
context.Assembler.Cmp(actual, expected);
context.JumpToNear(ArmCondition.Ne);
switch (accessSize)
{
case AccessSize.Byte:
context.Assembler.Stlxrb(desired, address, result);
break;
case AccessSize.Hword:
context.Assembler.Stlxrh(desired, address, result);
break;
default:
context.Assembler.Stlxr(desired, address, result);
break;
}
context.Assembler.Cbnz(result, startOffset - context.StreamOffset); // Retry if store failed.
context.JumpHere();
context.Assembler.Clrex();
}
private static void GenerateAtomicDcas(
CodeGenContext context,
Operand address,
Operand expectedLow,
Operand expectedHigh,
Operand desiredLow,
Operand desiredHigh,
Operand actualLow,
Operand actualHigh,
Operand temp0,
Operand temp1)
{
int startOffset = context.StreamOffset;
context.Assembler.Ldaxp(actualLow, actualHigh, address);
context.Assembler.Eor(temp0, actualHigh, expectedHigh);
context.Assembler.Eor(temp1, actualLow, expectedLow);
context.Assembler.Orr(temp0, temp1, temp0);
context.JumpToNearIfNotZero(temp0);
Operand result = Register(temp0, OperandType.I32);
context.Assembler.Stlxp(desiredLow, desiredHigh, address, result);
context.Assembler.Cbnz(result, startOffset - context.StreamOffset); // Retry if store failed.
context.JumpHere();
context.Assembler.Clrex();
}
private static bool TryPairMemoryOp(CodeGenContext context, Operation currentOp, Operation nextOp)
{
if (!TryGetMemOpBaseAndOffset(currentOp, out Operand op1Base, out int op1Offset))
{
return false;
}
if (!TryGetMemOpBaseAndOffset(nextOp, out Operand op2Base, out int op2Offset))
{
return false;
}
if (op1Base != op2Base)
{
return false;
}
OperandType valueType = GetMemOpValueType(currentOp);
if (valueType != GetMemOpValueType(nextOp) || op1Offset + valueType.GetSizeInBytes() != op2Offset)
{
return false;
}
if (!CodeGenCommon.ConstFitsOnSImm7(op1Offset, valueType.GetSizeInBytesLog2()))
{
return false;
}
if (currentOp.Instruction == Instruction.Load)
{
context.Assembler.LdpRiUn(currentOp.Destination, nextOp.Destination, op1Base, op1Offset);
}
else if (currentOp.Instruction == Instruction.Store)
{
context.Assembler.StpRiUn(currentOp.GetSource(1), nextOp.GetSource(1), op1Base, op1Offset);
}
else
{
return false;
}
return true;
}
private static bool IsLoadOrStore(Operation operation)
{
return operation.Instruction == Instruction.Load || operation.Instruction == Instruction.Store;
}
private static OperandType GetMemOpValueType(Operation operation)
{
if (operation.Destination != default)
{
return operation.Destination.Type;
}
return operation.GetSource(1).Type;
}
private static bool TryGetMemOpBaseAndOffset(Operation operation, out Operand baseAddress, out int offset)
{
baseAddress = default;
offset = 0;
Operand address = operation.GetSource(0);
if (address.Kind != OperandKind.Memory)
{
return false;
}
MemoryOperand memOp = address.GetMemory();
Operand baseOp = memOp.BaseAddress;
if (baseOp == default)
{
baseOp = memOp.Index;
if (baseOp == default || memOp.Scale != Multiplier.x1)
{
return false;
}
}
if (memOp.Index != default)
{
return false;
}
baseAddress = memOp.BaseAddress;
offset = memOp.Displacement;
return true;
}
private static Operand Register(Operand operand, OperandType type = OperandType.I64)
{
return Register(operand.GetRegister().Index, type);
}
private static Operand Register(int register, OperandType type = OperandType.I64)
{
return Factory.Register(register, RegisterType.Integer, type);
}
private static int Align16(int value)
{
return (value + 0xf) & ~0xf;
}
[Conditional("DEBUG")]
private static void ValidateUnOp(Operand dest, Operand source)
{
// Destination and source aren't forced to be equals
// EnsureSameReg (dest, source);
EnsureSameType(dest, source);
}
[Conditional("DEBUG")]
private static void ValidateBinOp(Operand dest, Operand src1, Operand src2)
{
// Destination and source aren't forced to be equals
// EnsureSameReg (dest, src1);
EnsureSameType(dest, src1, src2);
}
[Conditional("DEBUG")]
private static void ValidateShift(Operand dest, Operand src1, Operand src2)
{
// Destination and source aren't forced to be equals
// EnsureSameReg (dest, src1);
EnsureSameType(dest, src1);
Debug.Assert(dest.Type.IsInteger() && src2.Type == OperandType.I32);
}
private static void EnsureSameReg(Operand op1, Operand op2)
{
Debug.Assert(op1.Kind == OperandKind.Register || op1.Kind == OperandKind.Memory);
Debug.Assert(op1.Kind == op2.Kind);
Debug.Assert(op1.Value == op2.Value);
}
private static void EnsureSameType(Operand op1, Operand op2)
{
Debug.Assert(op1.Type == op2.Type);
}
private static void EnsureSameType(Operand op1, Operand op2, Operand op3)
{
Debug.Assert(op1.Type == op2.Type);
Debug.Assert(op1.Type == op3.Type);
}
private static void EnsureSameType(Operand op1, Operand op2, Operand op3, Operand op4)
{
Debug.Assert(op1.Type == op2.Type);
Debug.Assert(op1.Type == op3.Type);
Debug.Assert(op1.Type == op4.Type);
}
}
}