diff options
Diffstat (limited to 'newlib/libc/machine/arm/machine/fenv-vfp.h')
| -rw-r--r-- | newlib/libc/machine/arm/machine/fenv-vfp.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/newlib/libc/machine/arm/machine/fenv-vfp.h b/newlib/libc/machine/arm/machine/fenv-vfp.h new file mode 100644 index 000000000..25d71f3ab --- /dev/null +++ b/newlib/libc/machine/arm/machine/fenv-vfp.h @@ -0,0 +1,187 @@ +/*- + * 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. + * + * $FreeBSD$ + */ + + + +#define vmrs_fpscr(__r) __asm __volatile("vmrs %0, fpscr" : "=&r"(__r)) +#define vmsr_fpscr(__r) __asm __volatile("vmsr fpscr, %0" : : "r"(__r)) + + +#define _FPU_MASK_SHIFT 8 + +__fenv_static inline int feclearexcept(int excepts) +{ + fexcept_t __fpsr; + + vmrs_fpscr(__fpsr); + __fpsr &= ~excepts; + vmsr_fpscr(__fpsr); + return (0); +} + +__fenv_static inline int +fegetexceptflag(fexcept_t *flagp, int excepts) +{ + fexcept_t __fpsr; + + vmrs_fpscr(__fpsr); + *flagp = __fpsr & excepts; + return (0); +} + +__fenv_static inline int +fesetexceptflag(const fexcept_t *flagp, int excepts) +{ + fexcept_t __fpsr; + + vmrs_fpscr(__fpsr); + __fpsr &= ~excepts; + __fpsr |= *flagp & excepts; + vmsr_fpscr(__fpsr); + return (0); +} + +__fenv_static inline int +feraiseexcept(int excepts) +{ + fexcept_t __ex = excepts; + + fesetexceptflag(&__ex, excepts); /* XXX */ + return (0); +} + +__fenv_static inline int +fetestexcept(int excepts) +{ + fexcept_t __fpsr; + + vmrs_fpscr(__fpsr); + return (__fpsr & excepts); +} + +__fenv_static inline int +fegetround(void) +{ + fenv_t __fpsr; + + vmrs_fpscr(__fpsr); + return (__fpsr & _ROUND_MASK); +} + +__fenv_static inline int +fesetround(int round) +{ + fenv_t __fpsr; + + vmrs_fpscr(__fpsr); + __fpsr &= ~(_ROUND_MASK); + __fpsr |= round; + vmsr_fpscr(__fpsr); + return (0); +} + +__fenv_static inline int +fegetenv(fenv_t *envp) +{ + + vmrs_fpscr(*envp); + return (0); +} + +__fenv_static inline int +feholdexcept(fenv_t *envp) +{ + fenv_t __env; + + vmrs_fpscr(__env); + *envp = __env; + __env &= ~(FE_ALL_EXCEPT); + vmsr_fpscr(__env); + return (0); +} + +__fenv_static inline int +fesetenv(const fenv_t *envp) +{ + + vmsr_fpscr(*envp); + return (0); +} + +__fenv_static inline int +feupdateenv(const fenv_t *envp) +{ + fexcept_t __fpsr; + + vmrs_fpscr(__fpsr); + vmsr_fpscr(*envp); + feraiseexcept(__fpsr & FE_ALL_EXCEPT); + return (0); +} + +#if __BSD_VISIBLE + +/* We currently provide no external definitions of the functions below. */ + +__fenv_static inline int +feenableexcept(int __mask) +{ + fenv_t __old_fpsr, __new_fpsr; + + vmrs_fpscr(__old_fpsr); + __new_fpsr = __old_fpsr | + ((__mask & FE_ALL_EXCEPT) << _FPU_MASK_SHIFT); + vmsr_fpscr(__new_fpsr); + return ((__old_fpsr >> _FPU_MASK_SHIFT) & FE_ALL_EXCEPT); +} + +__fenv_static inline int +fedisableexcept(int __mask) +{ + fenv_t __old_fpsr, __new_fpsr; + + vmrs_fpscr(__old_fpsr); + __new_fpsr = __old_fpsr & + ~((__mask & FE_ALL_EXCEPT) << _FPU_MASK_SHIFT); + vmsr_fpscr(__new_fpsr); + return ((__old_fpsr >> _FPU_MASK_SHIFT) & FE_ALL_EXCEPT); +} + +__fenv_static inline int +fegetexcept(void) +{ + fenv_t __fpsr; + + vmrs_fpscr(__fpsr); + return (__fpsr & FE_ALL_EXCEPT); +} + +#endif /* __BSD_VISIBLE */ + |