99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
/***************************************************************************************************
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* Copyright (c) 2017 - 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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**************************************************************************************************/
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/*!
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\file
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\brief Defines categories for floating point numbers for use in NVRTC-compiled code
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*/
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#pragma once
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namespace cutlass {
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// All floating-point numbers can be put in one of these categories.
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enum {
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FP_NAN =
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# define FP_NAN 0
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FP_NAN,
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FP_INFINITE =
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# define FP_INFINITE 1
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FP_INFINITE,
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FP_ZERO =
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# define FP_ZERO 2
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FP_ZERO,
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FP_SUBNORMAL =
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# define FP_SUBNORMAL 3
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FP_SUBNORMAL,
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FP_NORMAL =
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# define FP_NORMAL 4
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FP_NORMAL
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};
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CUTLASS_HOST_DEVICE
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int fpclassify(float const& f) {
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uint32_t s;
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#if defined(__CUDA_ARCH__)
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s = reinterpret_cast<uint32_t const &>(f);
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#else
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std::memcpy(&s, &f, sizeof(s));
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#endif
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uint32_t exp = s & 0x7f800000;
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uint32_t mantissa = s & 0x007fffff;
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if (exp == 0x7f800000) {
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if (mantissa) {
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return FP_NAN;
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}
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else {
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return FP_INFINITE;
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}
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}
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else if (!exp) {
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if (mantissa) {
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return FP_SUBNORMAL;
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}
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else {
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return FP_ZERO;
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}
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}
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return FP_NORMAL;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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} // namespace cutlass
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///////////////////////////////////////////////////////////////////////////////////////////////////
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