mirror of
https://github.com/RGBCube/serenity
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65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*
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* Copyright (c) 2021, Mițca Dumitru <dumitru0mitca@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <stdint.h>
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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struct __x87_floating_point_environment {
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uint16_t __control_word;
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uint16_t __reserved1;
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uint16_t __status_word;
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uint16_t __reserved2;
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uint16_t __tag_word;
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uint16_t __reserved3;
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uint32_t __fpu_ip_offset;
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uint16_t __fpu_ip_selector;
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uint16_t __opcode : 11;
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uint16_t __reserved4 : 5;
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uint32_t __fpu_data_offset;
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uint16_t __fpu_data_selector;
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uint16_t __reserved5;
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};
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typedef struct fenv_t {
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struct __x87_floating_point_environment __x87_fpu_env;
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uint32_t __mxcsr;
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} fenv_t;
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#define FE_DFL_ENV ((fenv_t const*)-1)
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int fegetenv(fenv_t*);
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int fesetenv(fenv_t const*);
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int feholdexcept(fenv_t*);
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int feupdateenv(fenv_t const*);
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#define FE_INVALID 1u << 0
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#define FE_DIVBYZERO 1u << 2
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#define FE_OVERFLOW 1u << 3
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#define FE_UNDERFLOW 1u << 4
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#define FE_INEXACT 1u << 5
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#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
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typedef uint16_t fexcept_t;
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int fegetexceptflag(fexcept_t*, int exceptions);
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int fesetexceptflag(fexcept_t const*, int exceptions);
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int feclearexcept(int exceptions);
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int fetestexcept(int exceptions);
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int feraiseexcept(int exceptions);
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#define FE_TONEAREST 0
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#define FE_DOWNWARD 1
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#define FE_UPWARD 2
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#define FE_TOWARDZERO 3
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int fesetround(int round);
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int fegetround(void);
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__END_DECLS
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