81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
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/*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2020 Kito Cheng
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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
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* 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
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* from 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
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __RISCV_MATH_H
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#define __RISCV_MATH_H
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#ifdef __riscv_flen
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#define FCLASS_NEG_INF (1 << 0)
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#define FCLASS_NEG_NORMAL (1 << 1)
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#define FCLASS_NEG_SUBNORMAL (1 << 2)
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#define FCLASS_NEG_ZERO (1 << 3)
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#define FCLASS_POS_ZERO (1 << 4)
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#define FCLASS_POS_SUBNORMAL (1 << 5)
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#define FCLASS_POS_NORMAL (1 << 6)
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#define FCLASS_POS_INF (1 << 7)
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#define FCLASS_SNAN (1 << 8)
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#define FCLASS_QNAN (1 << 9)
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#define FCLASS_INF (FCLASS_NEG_INF | FCLASS_POS_INF)
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#define FCLASS_ZERO (FCLASS_NEG_ZERO | FCLASS_POS_ZERO)
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#define FCLASS_NORMAL (FCLASS_NEG_NORMAL | FCLASS_POS_NORMAL)
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#define FCLASS_SUBNORMAL (FCLASS_NEG_SUBNORMAL | FCLASS_POS_SUBNORMAL)
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#define FCLASS_NAN (FCLASS_SNAN | FCLASS_QNAN)
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#if __riscv_flen >= 64
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static inline long _fclass_d(double x){
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long fclass;
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__asm __volatile ("fclass.d\t%0, %1" : "=r" (fclass) : "f" (x));
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return fclass;
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}
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#endif
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#if __riscv_flen >= 32
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static inline long _fclass_f(float x){
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long fclass;
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__asm __volatile ("fclass.s\t%0, %1" : "=r" (fclass) : "f" (x));
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return fclass;
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}
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#endif
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#endif /* __riscv_flen */
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#endif /* __RISCV_MATH_H */
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