SimTypes.h

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//===- SimTypes.h - Sim dialect types ---------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#ifndef CIRCT_DIALECT_SIM_SIMTYPES_H
#define CIRCT_DIALECT_SIM_SIMTYPES_H
 
#include "circt/Support/FieldInfo.h"
#include "mlir/IR/BuiltinAttributes.h"
#include "mlir/IR/BuiltinTypes.h"
#include "mlir/IR/Types.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
 
namespace circt {
namespace hw {
class ModuleType;
} // namespace hw
namespace sim {
 
// Forward-declare the tablegen enum (defined in SimEnums.h.inc).
enum class DPIDirection : uint32_t;
 
/// Return the keyword string for a DPIDirection (e.g. "in", "return").
llvm::StringRef stringifyDPIDirectionKeyword(DPIDirection dir);
 
/// Parse a keyword string to a DPIDirection. Returns std::nullopt on failure.
std::optional<DPIDirection> parseDPIDirectionKeyword(llvm::StringRef keyword);
 
/// True if an argument with this direction is a call operand (input/inout/ref).
bool isCallOperandDir(DPIDirection dir);
 
/// A single argument in a DPI function type.
struct DPIArgument {
  mlir::StringAttr name;
  mlir::Type type;
  DPIDirection dir;
};
 
static inline bool operator==(const DPIArgument &a, const DPIArgument &b) {
  return a.dir == b.dir && a.name == b.name && a.type == b.type;
}
static inline llvm::hash_code hash_value(const DPIArgument &arg) {
  return llvm::hash_combine(static_cast<uint32_t>(arg.dir), arg.name, arg.type);
}
 
namespace detail {
struct DPIFunctionTypeStorage : public mlir::TypeStorage {
  DPIFunctionTypeStorage(llvm::ArrayRef<DPIArgument> args);
 
  using KeyTy = llvm::ArrayRef<DPIArgument>;
 
  bool operator==(const KeyTy &key) const {
    return llvm::equal(key, arguments);
  }
 
  static llvm::hash_code hashKey(const KeyTy &key) {
    return llvm::hash_combine_range(key.begin(), key.end());
  }
 
  static DPIFunctionTypeStorage *
  construct(mlir::TypeStorageAllocator &allocator, const KeyTy &key);
 
  KeyTy getAsKey() const { return arguments; }
 
  llvm::ArrayRef<DPIArgument> getArguments() const { return arguments; }
 
  /// Return the cached MLIR FunctionType for the call shape.
  mlir::FunctionType getCachedFunctionType() const { return cachedFuncType; }
 
  llvm::SmallVector<DPIArgument> arguments;
  llvm::SmallVector<size_t> inputToAbs;
  llvm::SmallVector<size_t> resultToAbs;
  mlir::FunctionType cachedFuncType;
};
 
/// A single alternative of a variant type.
using VariantAlternative = ::circt::FieldInfo;
} // namespace detail
 
} // namespace sim
} // namespace circt
 
#define GET_TYPEDEF_CLASSES
#include "circt/Dialect/Sim/SimTypes.h.inc"
 
#endif // CIRCT_DIALECT_SIM_SIMTYPES_H