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8226997bc7
Ryujinx/ARMeilleure/CodeGen/X86/CodeGenerator.cs
riperiperi 8226997bc7
CodeGen Optimisations (LSRA and Translator) (#978) 
* Start of JIT garbage collection improvements

- thread static pool for Operand, MemoryOperand, Operation
- Operands and Operations are always to be constructed via their static
helper classes, so they can be pooled.
- removing LinkedList from Node for sources/destinations (replaced with
List<>s for now, but probably could do arrays since size is bounded)
- removing params constructors from Node
- LinkedList<> to List<> with Clear() for Operand assignments/uses
- ThreadStaticPool is very simple and basically just exists for the
purpose of our specific translation allocation problem. Right now it
will stay at the worst case allocation count for that thread (so far) -
the pool can never shrink.

- Still some cases of Operand[] that haven't been removed yet. Will need
to evaluate them (eg. is there a reasonable max number of params for
Calls?)

* ConcurrentStack instead of ConcurrentQueue for Rejit

* Optimize some parts of LSRA

- BitMap now operates on 64-bit int rather than 32-bit
- BitMap is now pooled in a ThreadStatic pool (within lrsa)
- BitMap now is now its own iterator. Marginally speeds up iterating
through the bits.
- A few cases where enumerators were generated have been converted to
forms that generate less garbage.
- New data structure for sorting _usePositions in LiveIntervals. Much
faster split, NextUseAfter, initial insertion. Random insertion is
slightly slower.
- That last one is WIP since you need to insert the values backwards. It
would be ideal if it just flipped it for you, uncomplicating things on
the caller side.

* Use a static pool of thread static pools. (yes.)

Prevents each execution thread creating its own lowCq pool and making me cry.

* Move constant value to top, change naming convention.

* Fix iteration of memory operands.

* Increase max thread count.

* Address Feedback
2020-03-18 22:44:32 +11:00

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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.IO;
using System.Numerics;
using static ARMeilleure.IntermediateRepresentation.OperandHelper;
namespace ARMeilleure.CodeGen.X86
{
static class CodeGenerator
{
private const int PageSize = 0x1000;
private const int StackGuardSize = 0x2000;
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.Branch, GenerateBranch);
Add(Instruction.BranchIfFalse, GenerateBranchIfFalse);
Add(Instruction.BranchIfTrue, GenerateBranchIfTrue);
Add(Instruction.ByteSwap, GenerateByteSwap);
Add(Instruction.Call, GenerateCall);
Add(Instruction.Clobber, GenerateClobber);
Add(Instruction.CompareAndSwap, GenerateCompareAndSwap);
Add(Instruction.CompareEqual, GenerateCompareEqual);
Add(Instruction.CompareGreater, GenerateCompareGreater);
Add(Instruction.CompareGreaterOrEqual, GenerateCompareGreaterOrEqual);
Add(Instruction.CompareGreaterOrEqualUI, GenerateCompareGreaterOrEqualUI);
Add(Instruction.CompareGreaterUI, GenerateCompareGreaterUI);
Add(Instruction.CompareLess, GenerateCompareLess);
Add(Instruction.CompareLessOrEqual, GenerateCompareLessOrEqual);
Add(Instruction.CompareLessOrEqualUI, GenerateCompareLessOrEqualUI);
Add(Instruction.CompareLessUI, GenerateCompareLessUI);
Add(Instruction.CompareNotEqual, GenerateCompareNotEqual);
Add(Instruction.ConditionalSelect, GenerateConditionalSelect);
Add(Instruction.ConvertI64ToI32, GenerateConvertI64ToI32);
Add(Instruction.ConvertToFP, GenerateConvertToFP);
Add(Instruction.Copy, GenerateCopy);
Add(Instruction.CountLeadingZeros, GenerateCountLeadingZeros);
Add(Instruction.CpuId, GenerateCpuId);
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.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);
}
private 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 & CompilerOptions.SsaForm) != 0 &&
(cctx.Options & CompilerOptions.Optimize) != 0)
{
Optimizer.RunPass(cfg);
}
X86Optimizer.RunPass(cfg);
Logger.EndPass(PassName.Optimization, cfg);
Logger.StartPass(PassName.PreAllocation);
StackAllocator stackAlloc = new StackAllocator();
PreAllocator.RunPass(cctx, stackAlloc, out int maxCallArgs);
Logger.EndPass(PassName.PreAllocation, cfg);
Logger.StartPass(PassName.RegisterAllocation);
if ((cctx.Options & CompilerOptions.SsaForm) != 0)
{
Ssa.Deconstruct(cfg);
}
IRegisterAllocator regAlloc;
if ((cctx.Options & CompilerOptions.Lsra) != 0)
{
regAlloc = new LinearScanAllocator();
}
else
{
regAlloc = new HybridAllocator();
}
RegisterMasks regMasks = new RegisterMasks(
CallingConvention.GetIntAvailableRegisters(),
CallingConvention.GetVecAvailableRegisters(),
CallingConvention.GetIntCallerSavedRegisters(),
CallingConvention.GetVecCallerSavedRegisters(),
CallingConvention.GetIntCalleeSavedRegisters(),
CallingConvention.GetVecCalleeSavedRegisters());
AllocationResult allocResult = regAlloc.RunPass(cfg, stackAlloc, regMasks);
Logger.EndPass(PassName.RegisterAllocation, cfg);
Logger.StartPass(PassName.CodeGeneration);
using (MemoryStream stream = new MemoryStream())
{
CodeGenContext context = new CodeGenContext(stream, allocResult, maxCallArgs, cfg.Blocks.Count);
UnwindInfo unwindInfo = WritePrologue(context);
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
context.EnterBlock(block);
for (Node node = block.Operations.First; node != null; node = node.ListNext)
{
if (node is Operation operation)
{
GenerateOperation(context, operation);
}
}
}
Logger.EndPass(PassName.CodeGeneration);
return new CompiledFunction(context.GetCode(), unwindInfo);
}
}
private static void GenerateOperation(CodeGenContext context, Operation operation)
{
if (operation.Instruction == Instruction.Extended)
{
IntrinsicOperation intrinOp = (IntrinsicOperation)operation;
IntrinsicInfo info = IntrinsicTable.GetInfo(intrinOp.Intrinsic);
switch (info.Type)
{
case IntrinsicType.Comis_:
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
switch (intrinOp.Intrinsic)
{
case Intrinsic.X86Comisdeq:
context.Assembler.Comisd(src1, src2);
context.Assembler.Setcc(dest, X86Condition.Equal);
break;
case Intrinsic.X86Comisdge:
context.Assembler.Comisd(src1, src2);
context.Assembler.Setcc(dest, X86Condition.AboveOrEqual);
break;
case Intrinsic.X86Comisdlt:
context.Assembler.Comisd(src1, src2);
context.Assembler.Setcc(dest, X86Condition.Below);
break;
case Intrinsic.X86Comisseq:
context.Assembler.Comiss(src1, src2);
context.Assembler.Setcc(dest, X86Condition.Equal);
break;
case Intrinsic.X86Comissge:
context.Assembler.Comiss(src1, src2);
context.Assembler.Setcc(dest, X86Condition.AboveOrEqual);
break;
case Intrinsic.X86Comisslt:
context.Assembler.Comiss(src1, src2);
context.Assembler.Setcc(dest, X86Condition.Below);
break;
}
context.Assembler.Movzx8(dest, dest, OperandType.I32);
break;
}
case IntrinsicType.PopCount:
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
EnsureSameType(dest, source);
Debug.Assert(dest.Type.IsInteger());
context.Assembler.Popcnt(dest, source, dest.Type);
break;
}
case IntrinsicType.Unary:
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
EnsureSameType(dest, source);
Debug.Assert(!dest.Type.IsInteger());
context.Assembler.WriteInstruction(info.Inst, dest, source);
break;
}
case IntrinsicType.UnaryToGpr:
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(dest.Type.IsInteger() && !source.Type.IsInteger());
if (intrinOp.Intrinsic == Intrinsic.X86Cvtsi2si)
{
if (dest.Type == OperandType.I32)
{
context.Assembler.Movd(dest, source); // int _mm_cvtsi128_si32(__m128i a)
}
else /* if (dest.Type == OperandType.I64) */
{
context.Assembler.Movq(dest, source); // __int64 _mm_cvtsi128_si64(__m128i a)
}
}
else
{
context.Assembler.WriteInstruction(info.Inst, dest, source, dest.Type);
}
break;
}
case IntrinsicType.Binary:
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
EnsureSameType(dest, src1);
if (!HardwareCapabilities.SupportsVexEncoding)
{
EnsureSameReg(dest, src1);
}
Debug.Assert(!dest.Type.IsInteger());
Debug.Assert(!src2.Type.IsInteger() || src2.Kind == OperandKind.Constant);
context.Assembler.WriteInstruction(info.Inst, dest, src1, src2);
break;
}
case IntrinsicType.BinaryGpr:
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
EnsureSameType(dest, src1);
if (!HardwareCapabilities.SupportsVexEncoding)
{
EnsureSameReg(dest, src1);
}
Debug.Assert(!dest.Type.IsInteger() && src2.Type.IsInteger());
context.Assembler.WriteInstruction(info.Inst, dest, src1, src2, src2.Type);
break;
}
case IntrinsicType.BinaryImm:
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
EnsureSameType(dest, src1);
if (!HardwareCapabilities.SupportsVexEncoding)
{
EnsureSameReg(dest, src1);
}
Debug.Assert(!dest.Type.IsInteger() && src2.Kind == OperandKind.Constant);
context.Assembler.WriteInstruction(info.Inst, dest, src1, src2.AsByte());
break;
}
case IntrinsicType.Ternary:
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
Operand src3 = operation.GetSource(2);
EnsureSameType(dest, src1, src2, src3);
Debug.Assert(!dest.Type.IsInteger());
if (info.Inst == X86Instruction.Blendvpd && HardwareCapabilities.SupportsVexEncoding)
{
context.Assembler.WriteInstruction(X86Instruction.Vblendvpd, dest, src1, src2, src3);
}
else if (info.Inst == X86Instruction.Blendvps && HardwareCapabilities.SupportsVexEncoding)
{
context.Assembler.WriteInstruction(X86Instruction.Vblendvps, dest, src1, src2, src3);
}
else if (info.Inst == X86Instruction.Pblendvb && HardwareCapabilities.SupportsVexEncoding)
{
context.Assembler.WriteInstruction(X86Instruction.Vpblendvb, dest, src1, src2, src3);
}
else
{
EnsureSameReg(dest, src1);
Debug.Assert(src3.GetRegister().Index == 0);
context.Assembler.WriteInstruction(info.Inst, dest, src1, src2);
}
break;
}
case IntrinsicType.TernaryImm:
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
Operand src3 = operation.GetSource(2);
EnsureSameType(dest, src1, src2);
if (!HardwareCapabilities.SupportsVexEncoding)
{
EnsureSameReg(dest, src1);
}
Debug.Assert(!dest.Type.IsInteger() && src3.Kind == OperandKind.Constant);
context.Assembler.WriteInstruction(info.Inst, dest, src1, src2, src3.AsByte());
break;
}
}
}
else
{
Action<CodeGenContext, Operation> func = _instTable[(int)operation.Instruction];
if (func != null)
{
func(context, operation);
}
else
{
throw new ArgumentException($"Invalid instruction \"{operation.Instruction}\".");
}
}
}
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, src2, dest.Type);
}
else if (dest.Type == OperandType.FP32)
{
context.Assembler.Addss(dest, src1, src2);
}
else /* if (dest.Type == OperandType.FP64) */
{
context.Assembler.Addsd(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, src2, dest.Type);
}
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.Xor(dest, src2, dest.Type);
}
else
{
context.Assembler.Xorps(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.Not(dest);
}
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.Or(dest, src2, dest.Type);
}
private static void GenerateBranch(CodeGenContext context, Operation operation)
{
context.JumpTo(context.CurrBlock.Branch);
}
private static void GenerateBranchIfFalse(CodeGenContext context, Operation operation)
{
Operand source = operation.GetSource(0);
context.Assembler.Test(source, source, source.Type);
context.JumpTo(X86Condition.Equal, context.CurrBlock.Branch);
}
private static void GenerateBranchIfTrue(CodeGenContext context, Operation operation)
{
Operand source = operation.GetSource(0);
context.Assembler.Test(source, source, source.Type);
context.JumpTo(X86Condition.NotEqual, context.CurrBlock.Branch);
}
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.Bswap(dest);
}
private static void GenerateCall(CodeGenContext context, Operation operation)
{
context.Assembler.Call(operation.GetSource(0));
}
private static void GenerateClobber(CodeGenContext context, Operation operation)
{
// This is only used to indicate that a register is clobbered to the
// register allocator, we don't need to produce any code.
}
private static void GenerateCompareAndSwap(CodeGenContext context, Operation operation)
{
Operand src1 = operation.GetSource(0);
if (operation.SourcesCount == 5) // CompareAndSwap128 has 5 sources, compared to CompareAndSwap64/32's 3.
{
MemoryOperand memOp = MemoryOp(OperandType.I64, src1);
context.Assembler.Cmpxchg16b(memOp);
}
else
{
Operand src2 = operation.GetSource(1);
Operand src3 = operation.GetSource(2);
EnsureSameType(src2, src3);
MemoryOperand memOp = MemoryOp(src3.Type, src1);
context.Assembler.Cmpxchg(memOp, src3);
}
}
private static void GenerateCompareEqual(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.Equal);
}
private static void GenerateCompareGreater(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.Greater);
}
private static void GenerateCompareGreaterOrEqual(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.GreaterOrEqual);
}
private static void GenerateCompareGreaterOrEqualUI(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.AboveOrEqual);
}
private static void GenerateCompareGreaterUI(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.Above);
}
private static void GenerateCompareLess(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.Less);
}
private static void GenerateCompareLessOrEqual(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.LessOrEqual);
}
private static void GenerateCompareLessOrEqualUI(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.BelowOrEqual);
}
private static void GenerateCompareLessUI(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.Below);
}
private static void GenerateCompareNotEqual(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.NotEqual);
}
private static void GenerateCompare(CodeGenContext context, Operation operation, X86Condition condition)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
EnsureSameType(src1, src2);
Debug.Assert(dest.Type == OperandType.I32);
context.Assembler.Cmp(src1, src2, src1.Type);
context.Assembler.Setcc(dest, condition);
context.Assembler.Movzx8(dest, dest, OperandType.I32);
}
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);
EnsureSameReg (dest, src3);
EnsureSameType(dest, src2, src3);
Debug.Assert(dest.Type.IsInteger());
Debug.Assert(src1.Type == OperandType.I32);
context.Assembler.Test (src1, src1, src1.Type);
context.Assembler.Cmovcc(dest, src2, dest.Type, X86Condition.NotEqual);
}
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, 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);
if (dest.Type == OperandType.FP32)
{
Debug.Assert(source.Type.IsInteger() || source.Type == OperandType.FP64);
if (source.Type.IsInteger())
{
context.Assembler.Xorps (dest, dest, dest);
context.Assembler.Cvtsi2ss(dest, dest, source, source.Type);
}
else /* if (source.Type == OperandType.FP64) */
{
context.Assembler.Cvtsd2ss(dest, dest, source);
GenerateZeroUpper96(context, dest, dest);
}
}
else /* if (dest.Type == OperandType.FP64) */
{
Debug.Assert(source.Type.IsInteger() || source.Type == OperandType.FP32);
if (source.Type.IsInteger())
{
context.Assembler.Xorps (dest, dest, dest);
context.Assembler.Cvtsi2sd(dest, dest, source, source.Type);
}
else /* if (source.Type == OperandType.FP32) */
{
context.Assembler.Cvtss2sd(dest, dest, source);
GenerateZeroUpper64(context, dest, dest);
}
}
}
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 && source.Value == 0)
{
// Assemble "mov reg, 0" as "xor reg, reg" as the later is more efficient.
context.Assembler.Xor(dest, dest, OperandType.I32);
}
else if (dest.Type.IsInteger())
{
context.Assembler.Mov(dest, source, dest.Type);
}
else
{
context.Assembler.Movdqu(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.Bsr(dest, source, dest.Type);
int operandSize = dest.Type == OperandType.I32 ? 32 : 64;
int operandMask = operandSize - 1;
// When the input operand is 0, the result is undefined, however the
// ZF flag is set. We are supposed to return the operand size on that
// case. So, add an additional jump to handle that case, by moving the
// operand size constant to the destination register.
context.JumpToNear(X86Condition.NotEqual);
context.Assembler.Mov(dest, Const(operandSize | operandMask), OperandType.I32);
context.JumpHere();
// BSR returns the zero based index of the last bit set on the operand,
// starting from the least significant bit. However we are supposed to
// return the number of 0 bits on the high end. So, we invert the result
// of the BSR using XOR to get the correct value.
context.Assembler.Xor(dest, Const(operandMask), OperandType.I32);
}
private static void GenerateCpuId(CodeGenContext context, Operation operation)
{
context.Assembler.Cpuid();
}
private static void GenerateDivide(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand dividend = operation.GetSource(0);
Operand divisor = operation.GetSource(1);
if (!dest.Type.IsInteger())
{
ValidateBinOp(dest, dividend, divisor);
}
if (dest.Type.IsInteger())
{
divisor = operation.GetSource(2);
EnsureSameType(dest, divisor);
if (divisor.Type == OperandType.I32)
{
context.Assembler.Cdq();
}
else
{
context.Assembler.Cqo();
}
context.Assembler.Idiv(divisor);
}
else if (dest.Type == OperandType.FP32)
{
context.Assembler.Divss(dest, dividend, divisor);
}
else /* if (dest.Type == OperandType.FP64) */
{
context.Assembler.Divsd(dest, dividend, divisor);
}
}
private static void GenerateDivideUI(CodeGenContext context, Operation operation)
{
Operand divisor = operation.GetSource(2);
Operand rdx = Register(X86Register.Rdx);
Debug.Assert(divisor.Type.IsInteger());
context.Assembler.Xor(rdx, rdx, OperandType.I32);
context.Assembler.Div(divisor);
}
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;
Operand rsp = Register(X86Register.Rsp);
MemoryOperand memOp = MemoryOp(dest.Type, rsp, null, Multiplier.x1, offs);
GenerateLoad(context, memOp, dest);
}
private static void GenerateLoad(CodeGenContext context, Operation operation)
{
Operand value = operation.Destination;
Operand address = Memory(operation.GetSource(0), value.Type);
GenerateLoad(context, address, value);
}
private static void GenerateLoad16(CodeGenContext context, Operation operation)
{
Operand value = operation.Destination;
Operand address = Memory(operation.GetSource(0), value.Type);
Debug.Assert(value.Type.IsInteger());
context.Assembler.Movzx16(value, address, value.Type);
}
private static void GenerateLoad8(CodeGenContext context, Operation operation)
{
Operand value = operation.Destination;
Operand address = Memory(operation.GetSource(0), value.Type);
Debug.Assert(value.Type.IsInteger());
context.Assembler.Movzx8(value, address, value.Type);
}
private static void GenerateMultiply(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
if (src2.Kind != OperandKind.Constant)
{
EnsureSameReg(dest, src1);
}
EnsureSameType(dest, src1, src2);
if (dest.Type.IsInteger())
{
if (src2.Kind == OperandKind.Constant)
{
context.Assembler.Imul(dest, src1, src2, dest.Type);
}
else
{
context.Assembler.Imul(dest, src2, dest.Type);
}
}
else if (dest.Type == OperandType.FP32)
{
context.Assembler.Mulss(dest, src1, src2);
}
else /* if (dest.Type == OperandType.FP64) */
{
context.Assembler.Mulsd(dest, src1, src2);
}
}
private static void GenerateMultiply64HighSI(CodeGenContext context, Operation operation)
{
Operand source = operation.GetSource(1);
Debug.Assert(source.Type == OperandType.I64);
context.Assembler.Imul(source);
}
private static void GenerateMultiply64HighUI(CodeGenContext context, Operation operation)
{
Operand source = operation.GetSource(1);
Debug.Assert(source.Type == OperandType.I64);
context.Assembler.Mul(source);
}
private static void GenerateNegate(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
ValidateUnOp(dest, source);
Debug.Assert(dest.Type.IsInteger());
context.Assembler.Neg(dest);
}
private static void GenerateReturn(CodeGenContext context, Operation operation)
{
WriteEpilogue(context);
context.Assembler.Return();
}
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, src2, dest.Type);
}
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.Shl(dest, src2, dest.Type);
}
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.Sar(dest, src2, dest.Type);
}
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.Shr(dest, src2, dest.Type);
}
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.Movsx16(dest, source, dest.Type);
}
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.Movsx32(dest, source, dest.Type);
}
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.Movsx8(dest, source, dest.Type);
}
private static void GenerateSpill(CodeGenContext context, Operation operation)
{
GenerateSpill(context, operation, context.CallArgsRegionSize);
}
private static void GenerateSpillArg(CodeGenContext context, Operation operation)
{
GenerateSpill(context, operation, 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;
Operand rsp = Register(X86Register.Rsp);
MemoryOperand memOp = MemoryOp(source.Type, rsp, null, Multiplier.x1, offs);
GenerateStore(context, memOp, source);
}
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;
Operand rsp = Register(X86Register.Rsp);
MemoryOperand memOp = MemoryOp(OperandType.I64, rsp, null, Multiplier.x1, offs);
context.Assembler.Lea(dest, memOp, OperandType.I64);
}
private static void GenerateStore(CodeGenContext context, Operation operation)
{
Operand value = operation.GetSource(1);
Operand address = Memory(operation.GetSource(0), value.Type);
GenerateStore(context, address, value);
}
private static void GenerateStore16(CodeGenContext context, Operation operation)
{
Operand value = operation.GetSource(1);
Operand address = Memory(operation.GetSource(0), value.Type);
Debug.Assert(value.Type.IsInteger());
context.Assembler.Mov16(address, value);
}
private static void GenerateStore8(CodeGenContext context, Operation operation)
{
Operand value = operation.GetSource(1);
Operand address = Memory(operation.GetSource(0), value.Type);
Debug.Assert(value.Type.IsInteger());
context.Assembler.Mov8(address, value);
}
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, src2, dest.Type);
}
else if (dest.Type == OperandType.FP32)
{
context.Assembler.Subss(dest, src1, src2);
}
else /* if (dest.Type == OperandType.FP64) */
{
context.Assembler.Subsd(dest, src1, src2);
}
}
private static void GenerateTailcall(CodeGenContext context, Operation operation)
{
WriteEpilogue(context);
context.Assembler.Jmp(operation.GetSource(0));
}
private static void GenerateVectorCreateScalar(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Operand source = operation.GetSource(0);
Debug.Assert(!dest.Type.IsInteger() && source.Type.IsInteger());
if (source.Type == OperandType.I32)
{
context.Assembler.Movd(dest, source); // (__m128i _mm_cvtsi32_si128(int a))
}
else /* if (source.Type == OperandType.I64) */
{
context.Assembler.Movq(dest, source); // (__m128i _mm_cvtsi64_si128(__int64 a))
}
}
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();
if (dest.Type == OperandType.I32)
{
Debug.Assert(index < 4);
if (HardwareCapabilities.SupportsSse41)
{
context.Assembler.Pextrd(dest, src1, index);
}
else
{
if (index != 0)
{
int mask0 = 0b11_10_01_00;
int mask1 = 0b11_10_01_00;
mask0 = BitUtils.RotateRight(mask0, index * 2, 8);
mask1 = BitUtils.RotateRight(mask1, 8 - index * 2, 8);
context.Assembler.Pshufd(src1, src1, (byte)mask0);
context.Assembler.Movd (dest, src1);
context.Assembler.Pshufd(src1, src1, (byte)mask1);
}
else
{
context.Assembler.Movd(dest, src1);
}
}
}
else if (dest.Type == OperandType.I64)
{
Debug.Assert(index < 2);
if (HardwareCapabilities.SupportsSse41)
{
context.Assembler.Pextrq(dest, src1, index);
}
else
{
if (index != 0)
{
const byte mask = 0b01_00_11_10;
context.Assembler.Pshufd(src1, src1, mask);
context.Assembler.Movq (dest, src1);
context.Assembler.Pshufd(src1, src1, mask);
}
else
{
context.Assembler.Movq(dest, src1);
}
}
}
else
{
Debug.Assert(index < (dest.Type == OperandType.FP32 ? 4 : 2));
// Floating-point types.
if ((index >= 2 && dest.Type == OperandType.FP32) ||
(index == 1 && dest.Type == OperandType.FP64))
{
context.Assembler.Movhlps(dest, dest, src1);
context.Assembler.Movq (dest, dest);
}
else
{
context.Assembler.Movq(dest, src1);
}
if (dest.Type == OperandType.FP32)
{
context.Assembler.Pshufd(dest, dest, (byte)(0xfc | (index & 1)));
}
}
}
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.Pextrw(dest, src1, index);
}
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);
if (HardwareCapabilities.SupportsSse41)
{
context.Assembler.Pextrb(dest, src1, index);
}
else
{
context.Assembler.Pextrw(dest, src1, (byte)(index >> 1));
if ((index & 1) != 0)
{
context.Assembler.Shr(dest, Const(8), OperandType.I32);
}
else
{
context.Assembler.Movzx8(dest, dest, OperandType.I32);
}
}
}
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
if (!HardwareCapabilities.SupportsVexEncoding)
{
EnsureSameReg(dest, src1);
}
Debug.Assert(src1.Type == OperandType.V128);
Debug.Assert(src3.Kind == OperandKind.Constant);
byte index = src3.AsByte();
void InsertIntSse2(int words)
{
if (dest.GetRegister() != src1.GetRegister())
{
context.Assembler.Movdqu(dest, src1);
}
for (int word = 0; word < words; word++)
{
// Insert lower 16-bits.
context.Assembler.Pinsrw(dest, dest, src2, (byte)(index * words + word));
// Move next word down.
context.Assembler.Ror(src2, Const(16), src2.Type);
}
}
if (src2.Type == OperandType.I32)
{
Debug.Assert(index < 4);
if (HardwareCapabilities.SupportsSse41)
{
context.Assembler.Pinsrd(dest, src1, src2, index);
}
else
{
InsertIntSse2(2);
}
}
else if (src2.Type == OperandType.I64)
{
Debug.Assert(index < 2);
if (HardwareCapabilities.SupportsSse41)
{
context.Assembler.Pinsrq(dest, src1, src2, index);
}
else
{
InsertIntSse2(4);
}
}
else if (src2.Type == OperandType.FP32)
{
Debug.Assert(index < 4);
if (index != 0)
{
if (HardwareCapabilities.SupportsSse41)
{
context.Assembler.Insertps(dest, src1, src2, (byte)(index << 4));
}
else
{
if (src1.GetRegister() == src2.GetRegister())
{
int mask = 0b11_10_01_00;
mask &= ~(0b11 << index * 2);
context.Assembler.Pshufd(dest, src1, (byte)mask);
}
else
{
int mask0 = 0b11_10_01_00;
int mask1 = 0b11_10_01_00;
mask0 = BitUtils.RotateRight(mask0, index * 2, 8);
mask1 = BitUtils.RotateRight(mask1, 8 - index * 2, 8);
context.Assembler.Pshufd(src1, src1, (byte)mask0); // Lane to be inserted in position 0.
context.Assembler.Movss (dest, src1, src2); // dest[127:0] = src1[127:32] | src2[31:0]
context.Assembler.Pshufd(dest, dest, (byte)mask1); // Inserted lane in original position.
if (dest.GetRegister() != src1.GetRegister())
{
context.Assembler.Pshufd(src1, src1, (byte)mask1); // Restore src1.
}
}
}
}
else
{
context.Assembler.Movss(dest, src1, src2);
}
}
else /* if (src2.Type == OperandType.FP64) */
{
Debug.Assert(index < 2);
if (index != 0)
{
context.Assembler.Movlhps(dest, src1, src2);
}
else
{
context.Assembler.Movsd(dest, src1, src2);
}
}
}
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
if (!HardwareCapabilities.SupportsVexEncoding)
{
EnsureSameReg(dest, src1);
}
Debug.Assert(src1.Type == OperandType.V128);
Debug.Assert(src3.Kind == OperandKind.Constant);
byte index = src3.AsByte();
context.Assembler.Pinsrw(dest, src1, src2, index);
}
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
// It's not possible to emulate this instruction without
// SSE 4.1 support without the use of a temporary register,
// so we instead handle that case on the pre-allocator when
// SSE 4.1 is not supported on the CPU.
Debug.Assert(HardwareCapabilities.SupportsSse41);
if (!HardwareCapabilities.SupportsVexEncoding)
{
EnsureSameReg(dest, src1);
}
Debug.Assert(src1.Type == OperandType.V128);
Debug.Assert(src3.Kind == OperandKind.Constant);
byte index = src3.AsByte();
context.Assembler.Pinsrb(dest, src1, src2, index);
}
private static void GenerateVectorOne(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Debug.Assert(!dest.Type.IsInteger());
context.Assembler.Pcmpeqw(dest, dest, dest);
}
private static void GenerateVectorZero(CodeGenContext context, Operation operation)
{
Operand dest = operation.Destination;
Debug.Assert(!dest.Type.IsInteger());
context.Assembler.Xorps(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);
GenerateZeroUpper64(context, dest, source);
}
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);
GenerateZeroUpper96(context, dest, source);
}
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.Movzx16(dest, source, OperandType.I32);
}
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());
context.Assembler.Mov(dest, source, OperandType.I32);
}
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.Movzx8(dest, source, OperandType.I32);
}
private static void GenerateLoad(CodeGenContext context, Operand address, Operand value)
{
switch (value.Type)
{
case OperandType.I32: context.Assembler.Mov (value, address, OperandType.I32); break;
case OperandType.I64: context.Assembler.Mov (value, address, OperandType.I64); break;
case OperandType.FP32: context.Assembler.Movd (value, address); break;
case OperandType.FP64: context.Assembler.Movq (value, address); break;
case OperandType.V128: context.Assembler.Movdqu(value, address); break;
default: Debug.Assert(false); break;
}
}
private static void GenerateStore(CodeGenContext context, Operand address, Operand value)
{
switch (value.Type)
{
case OperandType.I32: context.Assembler.Mov (address, value, OperandType.I32); break;
case OperandType.I64: context.Assembler.Mov (address, value, OperandType.I64); break;
case OperandType.FP32: context.Assembler.Movd (address, value); break;
case OperandType.FP64: context.Assembler.Movq (address, value); break;
case OperandType.V128: context.Assembler.Movdqu(address, value); break;
default: Debug.Assert(false); break;
}
}
private static void GenerateZeroUpper64(CodeGenContext context, Operand dest, Operand source)
{
context.Assembler.Movq(dest, source);
}
private static void GenerateZeroUpper96(CodeGenContext context, Operand dest, Operand source)
{
context.Assembler.Movq(dest, source);
context.Assembler.Pshufd(dest, dest, 0xfc);
}
private static void ValidateUnOp(Operand dest, Operand source)
{
#if DEBUG
EnsureSameReg (dest, source);
EnsureSameType(dest, source);
#endif
}
private static void ValidateBinOp(Operand dest, Operand src1, Operand src2)
{
#if DEBUG
EnsureSameReg (dest, src1);
EnsureSameType(dest, src1, src2);
#endif
}
private static void ValidateShift(Operand dest, Operand src1, Operand src2)
{
#if DEBUG
EnsureSameReg (dest, src1);
EnsureSameType(dest, src1);
Debug.Assert(dest.Type.IsInteger() && src2.Type == OperandType.I32);
#endif
}
private static void EnsureSameReg(Operand op1, Operand op2)
{
if (!op1.Type.IsInteger() && HardwareCapabilities.SupportsVexEncoding)
{
return;
}
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);
}
private static UnwindInfo WritePrologue(CodeGenContext context)
{
List<UnwindPushEntry> pushEntries = new List<UnwindPushEntry>();
Operand rsp = Register(X86Register.Rsp);
int mask = CallingConvention.GetIntCalleeSavedRegisters() & context.AllocResult.IntUsedRegisters;
while (mask != 0)
{
int bit = BitOperations.TrailingZeroCount(mask);
context.Assembler.Push(Register((X86Register)bit));
pushEntries.Add(new UnwindPushEntry(bit, RegisterType.Integer, context.StreamOffset));
mask &= ~(1 << bit);
}
int reservedStackSize = context.CallArgsRegionSize + context.AllocResult.SpillRegionSize;
reservedStackSize += context.XmmSaveRegionSize;
if (reservedStackSize >= StackGuardSize)
{
GenerateInlineStackProbe(context, reservedStackSize);
}
if (reservedStackSize != 0)
{
context.Assembler.Sub(rsp, Const(reservedStackSize), OperandType.I64);
}
int offset = reservedStackSize;
mask = CallingConvention.GetVecCalleeSavedRegisters() & context.AllocResult.VecUsedRegisters;
while (mask != 0)
{
int bit = BitOperations.TrailingZeroCount(mask);
offset -= 16;
MemoryOperand memOp = MemoryOp(OperandType.V128, rsp, null, Multiplier.x1, offset);
context.Assembler.Movdqu(memOp, Xmm((X86Register)bit));
pushEntries.Add(new UnwindPushEntry(bit, RegisterType.Vector, context.StreamOffset));
mask &= ~(1 << bit);
}
return new UnwindInfo(pushEntries.ToArray(), context.StreamOffset, reservedStackSize);
}
private static void WriteEpilogue(CodeGenContext context)
{
Operand rsp = Register(X86Register.Rsp);
int reservedStackSize = context.CallArgsRegionSize + context.AllocResult.SpillRegionSize;
reservedStackSize += context.XmmSaveRegionSize;
int offset = reservedStackSize;
int mask = CallingConvention.GetVecCalleeSavedRegisters() & context.AllocResult.VecUsedRegisters;
while (mask != 0)
{
int bit = BitOperations.TrailingZeroCount(mask);
offset -= 16;
MemoryOperand memOp = MemoryOp(OperandType.V128, rsp, null, Multiplier.x1, offset);
context.Assembler.Movdqu(Xmm((X86Register)bit), memOp);
mask &= ~(1 << bit);
}
if (reservedStackSize != 0)
{
context.Assembler.Add(rsp, Const(reservedStackSize), OperandType.I64);
}
mask = CallingConvention.GetIntCalleeSavedRegisters() & context.AllocResult.IntUsedRegisters;
while (mask != 0)
{
int bit = BitUtils.HighestBitSet(mask);
context.Assembler.Pop(Register((X86Register)bit));
mask &= ~(1 << bit);
}
}
private static void GenerateInlineStackProbe(CodeGenContext context, int size)
{
// Windows does lazy stack allocation, and there are just 2
// guard pages on the end of the stack. So, if the allocation
// size we make is greater than this guard size, we must ensure
// that the OS will map all pages that we'll use. We do that by
// doing a dummy read on those pages, forcing a page fault and
// the OS to map them. If they are already mapped, nothing happens.
const int pageMask = PageSize - 1;
size = (size + pageMask) & ~pageMask;
Operand rsp = Register(X86Register.Rsp);
Operand temp = Register(CallingConvention.GetIntReturnRegister());
for (int offset = PageSize; offset < size; offset += PageSize)
{
Operand memOp = MemoryOp(OperandType.I32, rsp, null, Multiplier.x1, -offset);
context.Assembler.Mov(temp, memOp, OperandType.I32);
}
}
private static MemoryOperand Memory(Operand operand, OperandType type)
{
if (operand.Kind == OperandKind.Memory)
{
return operand as MemoryOperand;
}
return MemoryOp(type, operand);
}
private static Operand Register(X86Register register, OperandType type = OperandType.I64)
{
return OperandHelper.Register((int)register, RegisterType.Integer, type);
}
private static Operand Xmm(X86Register register)
{
return OperandHelper.Register((int)register, RegisterType.Vector, OperandType.V128);
}
}
}
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