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//===- MathToEmitC.cpp - Math to EmitC Patterns -----------------*- 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
//
//===----------------------------------------------------------------------===//
#include "mlir/Conversion/MathToEmitC/MathToEmitC.h"
#include "mlir/Dialect/EmitC/IR/EmitC.h"
#include "mlir/Dialect/Math/IR/Math.h"
#include "mlir/Transforms/DialectConversion.h"
using namespace mlir;
namespace {
template <typename OpType>
class LowerToEmitCCallOpaque : public OpRewritePattern<OpType> {
std::string calleeStr;
emitc::LanguageTarget languageTarget;
public:
LowerToEmitCCallOpaque(MLIRContext *context, std::string calleeStr,
emitc::LanguageTarget languageTarget)
: OpRewritePattern<OpType>(context), calleeStr(std::move(calleeStr)),
languageTarget(languageTarget) {}
LogicalResult matchAndRewrite(OpType op,
PatternRewriter &rewriter) const override;
};
template <typename OpType>
LogicalResult LowerToEmitCCallOpaque<OpType>::matchAndRewrite(
OpType op, PatternRewriter &rewriter) const {
if (!llvm::all_of(op->getOperandTypes(),
llvm::IsaPred<Float32Type, Float64Type>) ||
!llvm::all_of(op->getResultTypes(),
llvm::IsaPred<Float32Type, Float64Type>))
return rewriter.notifyMatchFailure(
op.getLoc(),
"expected all operands and results to be of type f32 or f64");
std::string modifiedCalleeStr = calleeStr;
if (languageTarget == emitc::LanguageTarget::cpp11) {
modifiedCalleeStr = "std::" + calleeStr;
} else if (languageTarget == emitc::LanguageTarget::c99) {
auto operandType = op->getOperandTypes()[0];
if (operandType.isF32())
modifiedCalleeStr = calleeStr + "f";
}
rewriter.replaceOpWithNewOp<emitc::CallOpaqueOp>(
op, op.getType(), modifiedCalleeStr, op->getOperands());
return success();
}
} // namespace
// Populates patterns to replace `math` operations with `emitc.call_opaque`,
// using function names consistent with those in <math.h>.
void mlir::populateConvertMathToEmitCPatterns(
RewritePatternSet &patterns, emitc::LanguageTarget languageTarget) {
auto *context = patterns.getContext();
patterns.insert<LowerToEmitCCallOpaque<math::FloorOp>>(context, "floor",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::RoundOp>>(context, "round",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::ExpOp>>(context, "exp",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::CosOp>>(context, "cos",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::SinOp>>(context, "sin",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::AcosOp>>(context, "acos",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::AsinOp>>(context, "asin",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::Atan2Op>>(context, "atan2",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::CeilOp>>(context, "ceil",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::AbsFOp>>(context, "fabs",
languageTarget);
patterns.insert<LowerToEmitCCallOpaque<math::PowFOp>>(context, "pow",
languageTarget);
}
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