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Diffstat (limited to 'newlib/libc/machine/mips/machine/fenv-softfloat.h')
| -rw-r--r-- | newlib/libc/machine/mips/machine/fenv-softfloat.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/newlib/libc/machine/mips/machine/fenv-softfloat.h b/newlib/libc/machine/mips/machine/fenv-softfloat.h new file mode 100644 index 0000000..cf13e73 --- /dev/null +++ b/newlib/libc/machine/mips/machine/fenv-softfloat.h @@ -0,0 +1,182 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2004-2011 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. + * + * $FreeBSD$ + */ + +/* + * This file implements the functionality of <fenv.h> on platforms that + * lack an FPU and use softfloat in libc for floating point. To use it, + * you must write an <fenv.h> that provides the following: + * + * - a typedef for fenv_t, which may be an integer or struct type + * - a typedef for fexcept_t (XXX This file assumes fexcept_t is a + * simple integer type containing the exception mask.) + * - definitions of FE_* constants for the five exceptions and four + * rounding modes in IEEE 754, as described in fenv(3) + * - a definition, and the corresponding external symbol, for FE_DFL_ENV + * - a macro __set_env(env, flags, mask, rnd), which sets the given fenv_t + * from the exception flags, mask, and rounding mode + * - macros __env_flags(env), __env_mask(env), and __env_round(env), which + * extract fields from an fenv_t + * - a definition of __fenv_static + * + * If the architecture supports an optional FPU, it's recommended that you + * define fenv_t and fexcept_t to match the hardware ABI. Otherwise, it + * doesn't matter how you define them. + */ +#include <errno.h> +int __softfloat_float_exception_flags; +int __softfloat_float_exception_mask; +int __softfloat_float_rounding_mode; + + +__fenv_static inline int +feclearexcept(int excepts) +{ + + __softfloat_float_exception_flags &= ~excepts; + return (0); +} + +__fenv_static inline int +fegetexceptflag(fexcept_t *flagp, int excepts) +{ + + *flagp = __softfloat_float_exception_flags & excepts; + return (0); +} + +__fenv_static inline int +fesetexceptflag(const fexcept_t *flagp, int excepts) +{ + + __softfloat_float_exception_flags &= ~excepts; + __softfloat_float_exception_flags |= *flagp & excepts; + return (0); +} + +__fenv_static inline int +feraiseexcept(int excepts) +{ + +return(excepts ? -ENOTSUP : 0 ); + +} + +__fenv_static inline int +fetestexcept(int excepts) +{ + + return (__softfloat_float_exception_flags & excepts); +} + +__fenv_static inline int +fegetround(void) +{ + + return (__softfloat_float_rounding_mode); +} + +__fenv_static inline int +fesetround(int rounding_mode) +{ + + __softfloat_float_rounding_mode = rounding_mode; + return (0); +} + +__fenv_static inline int +fegetenv(fenv_t *envp) +{ + + __set_env(*envp, __softfloat_float_exception_flags, + __softfloat_float_exception_mask, __softfloat_float_rounding_mode); + return (0); +} + +__fenv_static inline int +feholdexcept(fenv_t *envp) +{ + fenv_t __env; + + fegetenv(envp); + __softfloat_float_exception_flags = 0; + __softfloat_float_exception_mask = 0; + return (0); +} + +__fenv_static inline int +fesetenv(const fenv_t *envp) +{ + + __softfloat_float_exception_flags = __env_flags(*envp); + __softfloat_float_exception_mask = __env_mask(*envp); + __softfloat_float_rounding_mode = __env_round(*envp); + return (0); +} + +__fenv_static inline int +feupdateenv(const fenv_t *envp) +{ + int __oflags = __softfloat_float_exception_flags; + + fesetenv(envp); + feraiseexcept(__oflags); + return (0); +} + +#if __BSD_VISIBLE + +/* We currently provide no external definitions of the functions below. */ + +__fenv_static inline int +feenableexcept(int __mask) +{ + int __omask = __softfloat_float_exception_mask; + + __softfloat_float_exception_mask |= __mask; + return (__omask); +} + +__fenv_static inline int +fedisableexcept(int __mask) +{ + int __omask = __softfloat_float_exception_mask; + + __softfloat_float_exception_mask &= ~__mask; + return (__omask); +} + +__fenv_static inline int +fegetexcept(void) +{ + + return (__softfloat_float_exception_mask); +} + +#endif /* __BSD_VISIBLE */ |