IbisAddOperatorLibrary.cpp

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//===- IbisAddOperatorLibraryPass.cpp -------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
 
#include "PassDetails.h"
 
#include "circt/Dialect/Comb/CombOps.h"
#include "circt/Dialect/Ibis/IbisDialect.h"
#include "circt/Dialect/Ibis/IbisOps.h"
#include "circt/Dialect/Ibis/IbisPasses.h"
#include "circt/Dialect/Ibis/IbisTypes.h"
#include "circt/Dialect/SSP/SSPOps.h"
#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
 
#include "circt/Transforms/Passes.h"
 
#include <iterator>
 
using namespace mlir;
using namespace circt;
using namespace ibis;
 
namespace {
 
struct AddOperatorLibraryPass
    : public IbisAddOperatorLibraryBase<AddOperatorLibraryPass> {
  void runOnOperation() override;
};
 
// TODO @mortbopet: once we have c++20, change  this to a templated lambda to
// avoid passing the builder around.
template <typename TOp>
void addOperator(ImplicitLocOpBuilder &b, int latency) {
  b.create<ssp::OperatorTypeOp>(
      b.getStringAttr(TOp::getOperationName()),
      b.getArrayAttr({b.getAttr<ssp::LatencyAttr>(latency)}));
}
 
} // anonymous namespace
 
void AddOperatorLibraryPass::runOnOperation() {
  auto b = ImplicitLocOpBuilder::atBlockBegin(getOperation().getLoc(),
                                              getOperation().getBody());
  auto opLib = b.create<ssp::OperatorLibraryOp>();
  opLib.setSymNameAttr(b.getStringAttr(kIbisOperatorLibName));
  b.setInsertionPointToStart(opLib.getBodyBlock());
 
  // Provide definitions for some comb ops - just latency properties for now.
 
  // Arithmetic operators
  addOperator<comb::AddOp>(b, 1);
  addOperator<comb::SubOp>(b, 1);
  addOperator<comb::MulOp>(b, 2);
  addOperator<comb::ModSOp>(b, 2);
  addOperator<comb::ModUOp>(b, 2);
 
  // Boolean operators
  addOperator<comb::AndOp>(b, 0);
  addOperator<comb::OrOp>(b, 0);
  addOperator<comb::XorOp>(b, 0);
 
  // Comparison
  addOperator<comb::ICmpOp>(b, 1);
 
  // Shift
  addOperator<comb::ShlOp>(b, 0);
  addOperator<comb::ShrUOp>(b, 0);
  addOperator<comb::ShrSOp>(b, 1);
}
 
std::unique_ptr<Pass> circt::ibis::createAddOperatorLibraryPass() {
  return std::make_unique<AddOperatorLibraryPass>();
}