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Diffstat (limited to 'newlib/libc/machine/arm/sys/fenv.h')
| -rw-r--r-- | newlib/libc/machine/arm/sys/fenv.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/newlib/libc/machine/arm/sys/fenv.h b/newlib/libc/machine/arm/sys/fenv.h new file mode 100644 index 000000000..af74c5f47 --- /dev/null +++ b/newlib/libc/machine/arm/sys/fenv.h @@ -0,0 +1,122 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _SYS_FENV_H_ +#define _SYS_FENV_H_ 1 + +#include <sys/_types.h> +#include <sys/cdefs.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef __fenv_static +#define __fenv_static static +#endif + +typedef int fenv_t; +typedef int fexcept_t; + +/* Exception flags */ +#define FE_INVALID 0x0001 +#define FE_DIVBYZERO 0x0002 +#define FE_OVERFLOW 0x0004 +#define FE_UNDERFLOW 0x0008 +#define FE_INEXACT 0x0010 +#ifdef __ARM_PCS_VFP +#define FE_DENORMAL 0x0080 +#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \ + FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW | FE_DENORMAL) +#else +#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \ + FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW) +#endif + + + +/* Rounding modes */ +#define VFP_FE_TONEAREST 0x00000000 +#define VFP_FE_UPWARD 0x00400000 +#define VFP_FE_DOWNWARD 0x00800000 +#define VFP_FE_TOWARDZERO 0x00c00000 + +#ifdef __ARM_PCS_VFP +#define FE_TONEAREST VFP_FE_TONEAREST +#define FE_UPWARD VFP_FE_UPWARD +#define FE_DOWNWARD VFP_FE_DOWNWARD +#define FE_TOWARDZERO VFP_FE_TOWARDZERO +#else +#define FE_TONEAREST 0x0000 +#define FE_TOWARDZERO 0x0001 +#define FE_UPWARD 0x0002 +#define FE_DOWNWARD 0x0003 +#endif +#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \ + FE_UPWARD | FE_TOWARDZERO) + + +/* Default floating-point environment */ + +extern const fenv_t *_fe_dfl_env; +#define FE_DFL_ENV (_fe_dfl_env) + +/* We need to be able to map status flag positions to mask flag positions */ +#ifndef __ARM_PCS_VFP +#define _FPUSW_SHIFT 16 +#define _ENABLE_MASK (FE_ALL_EXCEPT << _FPUSW_SHIFT) +#endif + +#ifndef __ARM_PCS_VFP + +int feclearexcept(int excepts); +int fegetexceptflag(fexcept_t *flagp, int excepts); +int fesetexceptflag(const fexcept_t *flagp, int excepts); +int feraiseexcept(int excepts); +int fetestexcept(int excepts); +int fegetround(void); +int fesetround(int round); +int fegetenv(fenv_t *envp); +int feholdexcept(fenv_t *envp); +int fesetenv(const fenv_t *envp); +int feupdateenv(const fenv_t *envp); +#if __BSD_VISIBLE +int feenableexcept(int __mask); +int fedisableexcept(int __mask); +int fegetexcept(void); +#endif /* __BSD_VISIBLE */ + +#endif /* __ARM_PCS_VFP */ + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_FENV_H_ */ |