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| 1 | //===-- include/flang/Evaluate/intrinsics-library.h -------------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef FORTRAN_EVALUATE_INTRINSICS_LIBRARY_H_ |
| 10 | #define FORTRAN_EVALUATE_INTRINSICS_LIBRARY_H_ |
| 11 | |
| 12 | // Defines structures to be used in F18 for folding intrinsic function with host |
| 13 | // runtime libraries. |
| 14 | |
| 15 | #include <functional> |
| 16 | #include <optional> |
| 17 | #include <string> |
| 18 | #include <vector> |
| 19 | |
| 20 | namespace Fortran::evaluate { |
| 21 | class FoldingContext; |
| 22 | class DynamicType; |
| 23 | struct SomeType; |
| 24 | template <typename> class Expr; |
| 25 | |
| 26 | // Define a callable type that is used to fold scalar intrinsic function using |
| 27 | // host runtime. These callables are responsible for the conversions between |
| 28 | // host types and Fortran abstract types (Scalar<T>). They also deal with |
| 29 | // floating point environment (To set it up to match the Fortran compiling |
| 30 | // options and to clean it up after the call). Floating point errors are |
| 31 | // reported to the FoldingContext. For 16bits float types, 32bits float host |
| 32 | // runtime plus conversions may be used to build the host wrappers if no 16bits |
| 33 | // runtime is available. IEEE 128bits float may also be used for x87 float. |
| 34 | // Potential conversion overflows are reported by the HostRuntimeWrapper in the |
| 35 | // FoldingContext. |
| 36 | using HostRuntimeWrapper = std::function<Expr<SomeType>( |
| 37 | FoldingContext &, std::vector<Expr<SomeType>> &&)>; |
| 38 | |
| 39 | // Returns the folder using host runtime given the intrinsic function name, |
| 40 | // result and argument types. Nullopt if no host runtime is available for such |
| 41 | // intrinsic function. |
| 42 | std::optional<HostRuntimeWrapper> GetHostRuntimeWrapper(const std::string &name, |
| 43 | DynamicType resultType, const std::vector<DynamicType> &argTypes); |
| 44 | } // namespace Fortran::evaluate |
| 45 | #endif // FORTRAN_EVALUATE_INTRINSICS_LIBRARY_H_ |
| 46 |
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