CUTLASS: platform.h File Reference - Cutlass

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platform.h File Reference

C++ features that may be otherwise unimplemented for CUDA device functions. More...

#include <stdint.h>
#include <algorithm>
#include <cstddef>
#include <functional>
#include <utility>
#include "cutlass/cutlass.h"

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Classes

Namespaces

Macros

Typedefs

| | typedef integral_constant< bool, true > | cutlass::platform::true_type | | | The type used as a compile-time boolean with true value. More...
| | | | typedef integral_constant< bool, false > | cutlass::platform::false_type | | | The type used as a compile-time boolean with false value. More...
| | |

Functions

Detailed Description

This file has three components:

(1) Macros:

Empty macro defines for C++ keywords not supported by the current version of C++. These simply allow compilation to proceed (but do not provide the added semantics).
- noexcept
- constexpr
- nullptr
- static_assert
Macro functions that we need in constant expressions because the C++ equivalents require constexpr compiler support. These are prefixed with __NV_STD_*
- __NV_STD_MAX
- __NV_STD_MIN

(2) Re-implementations of STL functions and types:

C++ features that need the device annotation. These are placed into the platform namespace.
- plus
- less
- greater
- min
- max
- methods on std::pair (==, !=, <, <=, >, >=, and make_pair())

(3) Stop-gap implementations of unsupported STL functions and types:

STL functions and types defined by C++ 11/14/17/etc. that are not provided by the current version of C++. These are placed into the platform namespace
- integral_constant
- nullptr_t
- true_type
- false_type
- bool_constant
- enable_if
- conditional
- is_same
- is_base_of
- remove_const
- remove_volatile
- remove_cv
- is_volatile
- is_pointer
- is_void
- is_integral
- is_floating_point
- is_arithmetic
- is_fundamental
- is_trivially_copyable
- alignment_of
- aligned_storage

(4) Functions and types that are STL-like (but aren't in the STL):

TODO: min and max functors?

The idea is that, as we drop support for older compilers, we can simply #define the __NV_STD_XYZ macros and platform namespace to alias their C++ counterparts (or trivially find-and-replace their occurrences in code text).

Macro Definition Documentation

| #define __NV_STD_MAX | ( | | a, | | | | | b | | | ) | | (((b) > (a)) ? (b) : (a)) |

| #define __NV_STD_MIN | ( | | a, | | | | | b | | | ) | | (((b) < (a)) ? (b) : (a)) |

| #define __platform_cat | ( | | a, | | | | | b | | | ) | | __platform_cat_(a, b) |

| #define __platform_cat_ | ( | | a, | | | | | b | | | ) | | a##b |

| #define constexpr |

| #define noexcept |

| #define nullptr 0 |

| #define static_assert | ( | | __e, | | | | | __m | | | ) | | typedef int __platform_cat(AsSeRt, __LINE__)[(__e) ? 1 : -1] |

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