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| 1 | //===-- include/flang/Common/default-kinds.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_COMMON_DEFAULT_KINDS_H_ |
| 10 | #define FORTRAN_COMMON_DEFAULT_KINDS_H_ |
| 11 | |
| 12 | #include "flang/Common/Fortran.h" |
| 13 | #include <cstdint> |
| 14 | |
| 15 | namespace Fortran::common { |
| 16 | |
| 17 | // All address calculations in generated code are 64-bit safe. |
| 18 | // Compile-time folding of bounds, subscripts, and lengths |
| 19 | // consequently uses 64-bit signed integers. The name reflects |
| 20 | // this usage as a subscript into a constant array. |
| 21 | using ConstantSubscript = std::int64_t; |
| 22 | |
| 23 | // Represent the default values of the kind parameters of the |
| 24 | // various intrinsic types. Most of these can be configured by |
| 25 | // means of the compiler command line. |
| 26 | class IntrinsicTypeDefaultKinds { |
| 27 | public: |
| 28 | IntrinsicTypeDefaultKinds(); |
| 29 | int subscriptIntegerKind() const { return subscriptIntegerKind_; } |
| 30 | int sizeIntegerKind() const { return sizeIntegerKind_; } |
| 31 | int doublePrecisionKind() const { return doublePrecisionKind_; } |
| 32 | int quadPrecisionKind() const { return quadPrecisionKind_; } |
| 33 | |
| 34 | IntrinsicTypeDefaultKinds &set_defaultIntegerKind(int); |
| 35 | IntrinsicTypeDefaultKinds &set_subscriptIntegerKind(int); |
| 36 | IntrinsicTypeDefaultKinds &set_sizeIntegerKind(int); |
| 37 | IntrinsicTypeDefaultKinds &set_defaultRealKind(int); |
| 38 | IntrinsicTypeDefaultKinds &set_doublePrecisionKind(int); |
| 39 | IntrinsicTypeDefaultKinds &set_quadPrecisionKind(int); |
| 40 | IntrinsicTypeDefaultKinds &set_defaultCharacterKind(int); |
| 41 | IntrinsicTypeDefaultKinds &set_defaultLogicalKind(int); |
| 42 | |
| 43 | int GetDefaultKind(TypeCategory) const; |
| 44 | |
| 45 | private: |
| 46 | // Default REAL just simply has to be IEEE-754 single precision today. |
| 47 | // It occupies one numeric storage unit by definition. The default INTEGER |
| 48 | // and default LOGICAL intrinsic types also have to occupy one numeric |
| 49 | // storage unit, so their kinds are also forced. Default COMPLEX must always |
| 50 | // comprise two default REAL components. |
| 51 | int defaultIntegerKind_{4}; |
| 52 | int subscriptIntegerKind_{8}; |
| 53 | int sizeIntegerKind_{4}; // SIZE(), UBOUND(), &c. default KIND= |
| 54 | int defaultRealKind_{defaultIntegerKind_}; |
| 55 | int doublePrecisionKind_{2 * defaultRealKind_}; |
| 56 | int quadPrecisionKind_{2 * doublePrecisionKind_}; |
| 57 | int defaultCharacterKind_{1}; |
| 58 | int defaultLogicalKind_{defaultIntegerKind_}; |
| 59 | }; |
| 60 | } // namespace Fortran::common |
| 61 | #endif // FORTRAN_COMMON_DEFAULT_KINDS_H_ |
| 62 |
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