internal static GlobalAccessorInstruction Create(BinaryParsingReader reader, bool getter)
{
uint globalIndex = reader.ReadVarUint32();
OpCodes opcode = getter ? OpCodes.GetGlobal : OpCodes.SetGlobal;
if (MaxReusableIndex < globalIndex)
{
return(new GlobalAccessorInstruction(opcode)
{
GlobalIndex = globalIndex
});
}
GlobalAccessorInstruction[] reuseTarget = getter ? _knownGlobalGetters : _knownGlobalSetters;
GlobalAccessorInstruction result = reuseTarget[globalIndex];
if (null != result)
{
_reuseCount++;
}
else
{
result = new GlobalAccessorInstruction(opcode)
{
GlobalIndex = globalIndex
};
reuseTarget[globalIndex] = result;
}
return(result);
}
internal Instruction ReadInstruction()
{
OpCodes opcode = (OpCodes)this.ReadByte();
Instruction result = Instruction.FixedOpCodes[(int)opcode];
if (null != result)
{
return(result);
}
switch (opcode)
{
case OpCodes.Block:
return(BlockInstruction.Create(this));
case OpCodes.Loop:
return(LoopInstruction.Create(this));
case OpCodes.If:
// block_type
return(IfInstruction.Create(this));
case OpCodes.Br:
case OpCodes.BrIf:
// varuint32
return(BranchInstruction.Create(this, opcode));
case OpCodes.BrTable:
// custom
return(BranchTableInstruction.Create(this));
case OpCodes.Call:
case OpCodes.CallIndirect:
// varuint32 + varuint1
return(CallInstruction.Create(this, opcode));
case OpCodes.GetLocal:
case OpCodes.SetLocal:
case OpCodes.TeeLocal:
// local_index
return(LocalAccessorInstruction.Create(this, opcode));
case OpCodes.GetGlobal:
case OpCodes.SetGlobal:
// global_index
return(GlobalAccessorInstruction.Create(this, (OpCodes.GetGlobal == opcode)));
case OpCodes.I32Load:
case OpCodes.I64Load:
case OpCodes.F32Load:
case OpCodes.F64Load:
case OpCodes.I32Load8_s:
case OpCodes.I32Load8_u:
case OpCodes.I32Load16_s:
case OpCodes.I32Load16_u:
case OpCodes.I64Load8_s:
case OpCodes.I64Load8_u:
case OpCodes.I64Load16_s:
case OpCodes.I64Load16_u:
case OpCodes.I64Load32_s:
case OpCodes.I64Load32_u:
case OpCodes.I32Store:
case OpCodes.I64Store:
case OpCodes.F32Store:
case OpCodes.F64Store:
case OpCodes.I32Store8:
case OpCodes.I32Store16:
case OpCodes.I64Store8:
case OpCodes.I64Store16:
case OpCodes.I64Store32:
// memory_immediate
return(MemoryAccessInstruction.Create(this, opcode));
case OpCodes.CurrentMemory:
case OpCodes.GrowMemory:
// varuint1
return(MemoryControlInstruction.Create(this, opcode));
case OpCodes.I32Const:
// varint32
return(ConstantValueInstruction <int> .Create(this, OpCodes.I32Const, this.ReadVarInt32()));
case OpCodes.I64Const:
// varint64
return(ConstantValueInstruction <long> .Create(this, OpCodes.I64Const, this.ReadVarInt64()));
case OpCodes.F32Const:
// uint32
return(ConstantValueInstruction <float> .Create(this, OpCodes.F32Const, this.ReadVarFloat32()));
case OpCodes.F64Const:
// uint64
return(ConstantValueInstruction <double> .Create(this, OpCodes.F64Const, this.ReadVarFloat64()));
case OpCodes.F32eq:
case OpCodes.F32ge:
case OpCodes.F32gt:
case OpCodes.F32le:
case OpCodes.F32lt:
case OpCodes.F32ne:
case OpCodes.F64eq:
case OpCodes.F64ge:
case OpCodes.F64gt:
case OpCodes.F64le:
case OpCodes.F64lt:
case OpCodes.F64ne:
case OpCodes.I32eq:
case OpCodes.I32ge_s:
case OpCodes.I32ge_u:
case OpCodes.I32gt_s:
case OpCodes.I32gt_u:
case OpCodes.I32le_s:
case OpCodes.I32le_u:
case OpCodes.I32lt_s:
case OpCodes.I32lt_u:
case OpCodes.I32ne:
case OpCodes.I64eq:
case OpCodes.I64ge_s:
case OpCodes.I64ge_u:
case OpCodes.I64gt_s:
case OpCodes.I64gt_u:
case OpCodes.I64le_s:
case OpCodes.I64le_u:
case OpCodes.I64lt_s:
case OpCodes.I64lt_u:
case OpCodes.I64ne:
return(RelationalInstruction.GetInstruction(opcode));
case OpCodes.F32Convert_sI32:
case OpCodes.F32Convert_uI32:
case OpCodes.F32Convert_sI64:
case OpCodes.F32Convert_uI64:
case OpCodes.F32demoteF64:
case OpCodes.F64Convert_sI32:
case OpCodes.F64Convert_uI32:
case OpCodes.F64Convert_sI64:
case OpCodes.F64Convert_uI64:
case OpCodes.F64PromoteF32:
case OpCodes.I32Trunc_sF32:
case OpCodes.I32Trunc_uF32:
case OpCodes.I32Trunc_sF64:
case OpCodes.I32Trunc_uF64:
case OpCodes.I32wrapI64:
case OpCodes.I64Extend_sI32:
case OpCodes.I64Extend_uI32:
case OpCodes.I64Trunc_sF32:
case OpCodes.I64Trunc_uF32:
case OpCodes.I64Trunc_sF64:
case OpCodes.I64Trunc_uF64:
return(ConversionInstruction.GetInstruction(opcode));
default:
throw new NotSupportedException();
}
}
