kopia lustrzana https://github.com/espressif/esp-idf
89 wiersze
2.8 KiB
C
89 wiersze
2.8 KiB
C
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/* Copyright (c) 2011 Tensilica Inc. ALL RIGHTS RESERVED.
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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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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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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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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
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TENSILICA INCORPORATED BE LIABLE FOR ANY DIRECT, INDIRECT,
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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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#ifndef _FENV_H
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#define _FENV_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef unsigned long fenv_t;
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typedef unsigned long fexcept_t;
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#define FE_DIVBYZERO 0x08
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#define FE_INEXACT 0x01
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#define FE_INVALID 0x10
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#define FE_OVERFLOW 0x04
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#define FE_UNDERFLOW 0x02
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#define FE_ALL_EXCEPT \
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(FE_DIVBYZERO | \
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FE_INEXACT | \
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FE_INVALID | \
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FE_OVERFLOW | \
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FE_UNDERFLOW)
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#define FE_DOWNWARD 0x3
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#define FE_TONEAREST 0x0
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#define FE_TOWARDZERO 0x1
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#define FE_UPWARD 0x2
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#define FE_DFL_ENV ((const fenv_t *) 0)
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int feclearexcept(int);
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int fegetexceptflag(fexcept_t *, int);
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int feraiseexcept(int);
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int fesetexceptflag(const fexcept_t *, int);
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int fetestexcept(int);
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int fegetround(void);
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int fesetround(int);
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int fegetenv(fenv_t *);
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int feholdexcept(fenv_t *);
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int fesetenv(const fenv_t *);
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int feupdateenv(const fenv_t *);
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/* glibc extensions */
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int feenableexcept(int excepts);
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int fedisableexcept(int excepts);
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int fegetexcept(void);
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#define _FE_EXCEPTION_FLAGS_OFFSET 7
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#define _FE_EXCEPTION_FLAG_MASK (FE_ALL_EXCEPT << _FE_EXCEPTION_FLAGS_OFFSET)
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#define _FE_EXCEPTION_ENABLE_OFFSET 2
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#define _FE_EXCEPTION_ENABLE_MASK (FE_ALL_EXCEPT << _FE_EXCEPTION_ENABLE_OFFSET)
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#define _FE_ROUND_MODE_OFFSET 0
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#define _FE_ROUND_MODE_MASK (0x3 << _FE_ROUND_MODE_OFFSET)
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#define _FE_FLOATING_ENV_MASK (_FE_EXCEPTION_FLAG_MASK | _FE_EXCEPTION_ENABLE_MASK | _FE_ROUND_MODE_MASK)
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#ifdef __cplusplus
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}
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#endif
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#endif
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