| 1 | //===--- Float16bits.h - supports 2-byte floats ---------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file implements f16 and bf16 to support the compilation and execution |
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| 10 | // of programs using these types. |
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| 11 | // |
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| 12 | //===----------------------------------------------------------------------===// |
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| 13 | |
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| 14 | #ifndef MLIR_EXECUTIONENGINE_FLOAT16BITS_H_ |
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| 15 | #define MLIR_EXECUTIONENGINE_FLOAT16BITS_H_ |
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| 16 | |
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| 17 | #include <cstdint> |
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| 18 | #include <iostream> |
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| 19 | |
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| 20 | #ifdef _WIN32 |
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| 21 | #ifdef mlir_float16_utils_EXPORTS // We are building this library |
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| 22 | #define MLIR_FLOAT16_EXPORT __declspec(dllexport) |
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| 23 | #define MLIR_FLOAT16_DEFINE_FUNCTIONS |
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| 24 | #else // We are using this library |
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| 25 | #define MLIR_FLOAT16_EXPORT __declspec(dllimport) |
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| 26 | #endif // mlir_float16_utils_EXPORTS |
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| 27 | #else // Non-windows: use visibility attributes. |
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| 28 | #define MLIR_FLOAT16_EXPORT __attribute__((visibility("default"))) |
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| 29 | #define MLIR_FLOAT16_DEFINE_FUNCTIONS |
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| 30 | #endif // _WIN32 |
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| 31 | |
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| 32 | // Implements half precision and bfloat with f16 and bf16, using the MLIR type |
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| 33 | // names. These data types are also used for c-interface runtime routines. |
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| 34 | extern "C" { |
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| 35 | struct MLIR_FLOAT16_EXPORT f16 { |
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| 36 | f16(float f = 0); |
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| 37 | uint16_t bits; |
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| 38 | }; |
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| 39 | |
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| 40 | struct MLIR_FLOAT16_EXPORT bf16 { |
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| 41 | bf16(float f = 0); |
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| 42 | uint16_t bits; |
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| 43 | }; |
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| 44 | } |
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| 45 | |
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| 46 | // Outputs a half precision value. |
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| 47 | MLIR_FLOAT16_EXPORT std::ostream &operator<<(std::ostream &os, const f16 &f); |
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| 48 | // Outputs a bfloat value. |
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| 49 | MLIR_FLOAT16_EXPORT std::ostream &operator<<(std::ostream &os, const bf16 &d); |
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| 50 | |
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| 51 | MLIR_FLOAT16_EXPORT bool operator==(const f16 &f1, const f16 &f2); |
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| 52 | MLIR_FLOAT16_EXPORT bool operator==(const bf16 &bf1, const bf16 &bf2); |
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| 53 | |
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| 54 | extern "C" MLIR_FLOAT16_EXPORT void printF16(uint16_t bits); |
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| 55 | extern "C" MLIR_FLOAT16_EXPORT void printBF16(uint16_t bits); |
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| 56 | |
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| 57 | #undef MLIR_FLOAT16_EXPORT |
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| 58 | #endif // MLIR_EXECUTIONENGINE_FLOAT16BITS_H_ |
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| 59 | |
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