Unless someone comments in the next 24 hours,
I think this is ready to post to newlib's mailing list
and get merged.
It looks like a faithful adaptation of the FreeBSD code to
newlib's libm architecture.
--joel
On Mon, Jun 1, 2020 at 7:10 PM Eshan dhawan <eshandhawa...@gmail.com> wrote:
> This patch adds support for ARM fenv to newlib
>
> the files are taken from FreeBSD
>
> Signed-off-by: Eshan dhawan <eshandhawa...@gmail.com>
> ---
> newlib/libc/machine/arm/machine/acle-compat.h | 182 ++++++++++
> newlib/libc/machine/arm/machine/fenv-mangle.h | 53 +++
> .../libc/machine/arm/machine/fenv-softfloat.h | 187 ++++++++++
> newlib/libc/machine/arm/machine/fenv-vfp.h | 187 ++++++++++
> newlib/libc/machine/arm/sys/fenv.h | 122 +++++++
> newlib/libm/machine/arm/Makefile.am | 18 +-
> newlib/libm/machine/arm/fe_dfl_env.c | 7 +
> newlib/libm/machine/arm/feclearexcept.c | 7 +
> newlib/libm/machine/arm/fegetenv.c | 7 +
> newlib/libm/machine/arm/fegetexceptflag.c | 7 +
> newlib/libm/machine/arm/fegetround.c | 7 +
> newlib/libm/machine/arm/feholdexcept.c | 7 +
> newlib/libm/machine/arm/fenv-softfp.c | 32 ++
> newlib/libm/machine/arm/fenv-vfp.c | 32 ++
> newlib/libm/machine/arm/fenv.c | 328 ++++++++++++++++++
> newlib/libm/machine/arm/feraiseexcept.c | 7 +
> newlib/libm/machine/arm/fesetenv.c | 7 +
> newlib/libm/machine/arm/fesetexceptflag.c | 7 +
> newlib/libm/machine/arm/fesetround.c | 7 +
> newlib/libm/machine/arm/fetestexcept.c | 7 +
> newlib/libm/machine/arm/feupdateenv.c | 7 +
> 21 files changed, 1224 insertions(+), 1 deletion(-)
> create mode 100644 newlib/libc/machine/arm/machine/acle-compat.h
> create mode 100644 newlib/libc/machine/arm/machine/fenv-mangle.h
> create mode 100644 newlib/libc/machine/arm/machine/fenv-softfloat.h
> create mode 100644 newlib/libc/machine/arm/machine/fenv-vfp.h
> create mode 100644 newlib/libc/machine/arm/sys/fenv.h
> create mode 100644 newlib/libm/machine/arm/fe_dfl_env.c
> create mode 100644 newlib/libm/machine/arm/feclearexcept.c
> create mode 100644 newlib/libm/machine/arm/fegetenv.c
> create mode 100644 newlib/libm/machine/arm/fegetexceptflag.c
> create mode 100644 newlib/libm/machine/arm/fegetround.c
> create mode 100644 newlib/libm/machine/arm/feholdexcept.c
> create mode 100644 newlib/libm/machine/arm/fenv-softfp.c
> create mode 100644 newlib/libm/machine/arm/fenv-vfp.c
> create mode 100644 newlib/libm/machine/arm/fenv.c
> create mode 100644 newlib/libm/machine/arm/feraiseexcept.c
> create mode 100644 newlib/libm/machine/arm/fesetenv.c
> create mode 100644 newlib/libm/machine/arm/fesetexceptflag.c
> create mode 100644 newlib/libm/machine/arm/fesetround.c
> create mode 100644 newlib/libm/machine/arm/fetestexcept.c
> create mode 100644 newlib/libm/machine/arm/feupdateenv.c
>
> diff --git a/newlib/libc/machine/arm/machine/acle-compat.h
> b/newlib/libc/machine/arm/machine/acle-compat.h
> new file mode 100644
> index 000000000..888ae2ea8
> --- /dev/null
> +++ b/newlib/libc/machine/arm/machine/acle-compat.h
> @@ -0,0 +1,182 @@
> +/*
> + * Copyright (c) 2014 ARM Ltd
> + * 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.
> + * 3. The name of the company may not be used to endorse or promote
> + * products derived from this software without specific prior written
> + * permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY ARM LTD ``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 ARM LTD 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.
> + */
> +
> +#ifndef __ARM_ARCH
> +
> +/* ACLE standardises a set of pre-defines that describe the ARM
> architecture.
> + These were mostly implemented in GCC around GCC-4.8; older versions
> + have no, or only partial support. To provide a level of backwards
> + compatibility we try to work out what the definitions should be, given
> + the older pre-defines that GCC did produce. This isn't complete, but
> + it should be enough for use by routines that depend on this header. */
> +
> +/* No need to handle ARMv8, GCC had ACLE support before that. */
> +
> +# ifdef __ARM_ARCH_7__
> +/* The common subset of ARMv7 in all profiles. */
> +# define __ARM_ARCH 7
> +# define __ARM_ARCH_ISA_THUMB 2
> +# define __ARM_FEATURE_CLZ
> +# define __ARM_FEATURE_LDREX 7
> +# define __ARM_FEATURE_UNALIGNED
> +# endif
> +
> +# if defined (__ARM_ARCH_7A__) || defined (__ARM_ARCH_7R__)
> +# define __ARM_ARCH 7
> +# define __ARM_ARCH_ISA_THUMB 2
> +# define __ARM_ARCH_ISA_ARM
> +# define __ARM_FEATURE_CLZ
> +# define __ARM_FEATURE_SIMD32
> +# define __ARM_FEATURE_DSP
> +# define __ARM_FEATURE_QBIT
> +# define __ARM_FEATURE_SAT
> +# define __ARM_FEATURE_LDREX 15
> +# define __ARM_FEATURE_UNALIGNED
> +# ifdef __ARM_ARCH_7A__
> +# define __ARM_ARCH_PROFILE 'A'
> +# else
> +# define __ARM_ARCH_PROFILE 'R'
> +# endif
> +# endif
> +
> +# ifdef __ARM_ARCH_7EM__
> +# define __ARM_ARCH 7
> +# define __ARM_ARCH_ISA_THUMB 2
> +# define __ARM_FEATURE_CLZ
> +# define __ARM_FEATURE_SIMD32
> +# define __ARM_FEATURE_DSP
> +# define __ARM_FEATURE_QBIT
> +# define __ARM_FEATURE_SAT
> +# define __ARM_FEATURE_LDREX 7
> +# define __ARM_FEATURE_UNALIGNED
> +# define __ARM_ARCH_PROFILE 'M'
> +# endif
> +
> +# ifdef __ARM_ARCH_7M__
> +# define __ARM_ARCH 7
> +# define __ARM_ARCH_ISA_THUMB 2
> +# define __ARM_FEATURE_CLZ
> +# define __ARM_FEATURE_QBIT
> +# define __ARM_FEATURE_SAT
> +# define __ARM_FEATURE_LDREX 7
> +# define __ARM_FEATURE_UNALIGNED
> +# define __ARM_ARCH_PROFILE 'M'
> +# endif
> +
> +# ifdef __ARM_ARCH_6T2__
> +# define __ARM_ARCH 6
> +# define __ARM_ARCH_ISA_THUMB 2
> +# define __ARM_ARCH_ISA_ARM
> +# define __ARM_FEATURE_CLZ
> +# define __ARM_FEATURE_SIMD32
> +# define __ARM_FEATURE_DSP
> +# define __ARM_FEATURE_QBIT
> +# define __ARM_FEATURE_SAT
> +# define __ARM_FEATURE_LDREX 4
> +# define __ARM_FEATURE_UNALIGNED
> +# endif
> +
> +# ifdef __ARM_ARCH_6M__
> +# define __ARM_ARCH 6
> +# define __ARM_ARCH_ISA_THUMB 1
> +# define __ARM_ARCH_PROFILE 'M'
> +# endif
> +
> +# if defined (__ARM_ARCH_6__) || defined (__ARM_ARCH_6J__) \
> + || defined (__ARM_ARCH_6K__) || defined (__ARM_ARCH_6Z__) \
> + || defined (__ARM_ARCH_6ZK__)
> +# define __ARM_ARCH 6
> +# define __ARM_ARCH_ISA_THUMB 1
> +# define __ARM_ARCH_ISA_ARM
> +# define __ARM_FEATURE_CLZ
> +# define __ARM_FEATURE_SIMD32
> +# define __ARM_FEATURE_DSP
> +# define __ARM_FEATURE_QBIT
> +# define __ARM_FEATURE_SAT
> +# define __ARM_FEATURE_UNALIGNED
> +# ifndef __thumb__
> +# if defined (__ARM_ARCH_6K__) || defined (__ARM_ARCH_6ZK__)
> +# define __ARM_FEATURE_LDREX 15
> +# else
> +# define __ARM_FEATURE_LDREX 4
> +# endif
> +# endif
> +# endif
> +
> +# if defined (__ARM_ARCH_5TE__) || defined (__ARM_ARCH_5E__)
> +# define __ARM_ARCH 5
> +# define __ARM_ARCH_ISA_ARM
> +# ifdef __ARM_ARCH_5TE__
> +# define __ARM_ARCH_ISA_THUMB 1
> +# endif
> +# define __ARM_FEATURE_CLZ
> +# define __ARM_FEATURE_DSP
> +# endif
> +
> +# if defined (__ARM_ARCH_5T__) || defined (__ARM_ARCH_5__)
> +# define __ARM_ARCH 5
> +# define __ARM_ARCH_ISA_ARM
> +# ifdef __ARM_ARCH_5TE__
> +# define __ARM_ARCH_ISA_THUMB 1
> +# endif
> +# define __ARM_FEATURE_CLZ
> +# endif
> +
> +# ifdef __ARM_ARCH_4T__
> +# define __ARM_ARCH 4
> +# define __ARM_ARCH_ISA_ARM
> +# define __ARM_ARCH_ISA_THUMB 1
> +# endif
> +
> +# ifdef __ARM_ARCH_4__
> +# define __ARM_ARCH 4
> +# define __ARM_ARCH_ISA_ARM
> +# endif
> +
> +# if defined (__ARM_ARCH_3__) || defined (__ARM_ARCH_3M__)
> +# define __ARM_ARCH 3
> +# define __ARM_ARCH_ISA_ARM
> +# endif
> +
> +# ifdef __ARM_ARCH_2__
> +# define __ARM_ARCH 2
> +# define __ARM_ARCH_ISA_ARM
> +# endif
> +
> +# ifdef __ARMEB__
> +# define __ARM_BIG_ENDIAN
> +# endif
> +
> +/* If we still don't know what the target architecture is, then we're
> + probably not using GCC. */
> +# ifndef __ARM_ARCH
> +# error Unable to determine architecture version.
> +# endif
> +
> +#endif /* __ARM_ARCH */
> +
> diff --git a/newlib/libc/machine/arm/machine/fenv-mangle.h
> b/newlib/libc/machine/arm/machine/fenv-mangle.h
> new file mode 100644
> index 000000000..476f7b20c
> --- /dev/null
> +++ b/newlib/libc/machine/arm/machine/fenv-mangle.h
> @@ -0,0 +1,53 @@
> +/*-
> + * Copyright (c) 2013 Andrew Turner <and...@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.
> + *
> + * $FreeBSD$
> + */
> +
> +#ifdef _FENV_MANGLE_H_
> +#error Only include fenv-mangle.h once
> +#endif
> +
> +#define _FENV_MANGLE_H_
> +
> +#ifndef FENV_MANGLE
> +#error FENV_MANGLE is undefined
> +#endif
> +
> +#define feclearexcept FENV_MANGLE(feclearexcept)
> +#define fegetexceptflag FENV_MANGLE(fegetexceptflag)
> +#define fesetexceptflag FENV_MANGLE(fesetexceptflag)
> +#define feraiseexcept FENV_MANGLE(feraiseexcept)
> +#define fetestexcept FENV_MANGLE(fetestexcept)
> +#define fegetround FENV_MANGLE(fegetround)
> +#define fesetround FENV_MANGLE(fesetround)
> +#define fegetenv FENV_MANGLE(fegetenv)
> +#define feholdexcept FENV_MANGLE(feholdexcept)
> +#define fesetenv FENV_MANGLE(fesetenv)
> +#define feupdateenv FENV_MANGLE(feupdateenv)
> +#define feenableexcept FENV_MANGLE(feenableexcept)
> +#define fedisableexcept FENV_MANGLE(fedisableexcept)
> +#define fegetexcept FENV_MANGLE(fegetexcept)
> +
> diff --git a/newlib/libc/machine/arm/machine/fenv-softfloat.h
> b/newlib/libc/machine/arm/machine/fenv-softfloat.h
> new file mode 100644
> index 000000000..b650437cc
> --- /dev/null
> +++ b/newlib/libc/machine/arm/machine/fenv-softfloat.h
> @@ -0,0 +1,187 @@
> + /*-
> + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
> + *
> + * Copyright (c) 2004-2011 David Schultz <d...@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_
> +#error "This file is meant to be included only by <sys/fenv.h>."
> +#endif
> +/* the file can be added from architecture specific fenv.h file found in
> + *libc/sys/arch/sys *
> + *
> + * 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 round)
> +{
> +
> + __softfloat_float_rounding_mode = round;
> + 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 */
> 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 <d...@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 */
> +
> 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 <d...@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_ */
> diff --git a/newlib/libm/machine/arm/Makefile.am
> b/newlib/libm/machine/arm/Makefile.am
> index 1f10a7a40..a64ee59d5 100644
> --- a/newlib/libm/machine/arm/Makefile.am
> +++ b/newlib/libm/machine/arm/Makefile.am
> @@ -19,7 +19,23 @@ LIB_SOURCES = \
> sf_nearbyint.c \
> sf_rint.c \
> sf_round.c \
> - sf_trunc.c
> + sf_trunc.c \
> + feclearexcept.c \
> + fe_dfl_env.c\
> + fegetenv.c \
> + fegetexceptflag.c \
> + fegetround.c \
> + feholdexcept.c \
> + fenv.c \
> + feraiseexcept.c \
> + fesetenv.c \
> + fesetexceptflag.c \
> + fesetround.c \
> + fetestexcept.c \
> + feupdateenv.c \
> + fenv-vfp.c \
> + fenv-softfp.c
> +
>
> noinst_LIBRARIES = lib.a
> lib_a_SOURCES = $(LIB_SOURCES)
> diff --git a/newlib/libm/machine/arm/fe_dfl_env.c
> b/newlib/libm/machine/arm/fe_dfl_env.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fe_dfl_env.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/feclearexcept.c
> b/newlib/libm/machine/arm/feclearexcept.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/feclearexcept.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/fegetenv.c
> b/newlib/libm/machine/arm/fegetenv.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fegetenv.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/fegetexceptflag.c
> b/newlib/libm/machine/arm/fegetexceptflag.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fegetexceptflag.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/fegetround.c
> b/newlib/libm/machine/arm/fegetround.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fegetround.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/feholdexcept.c
> b/newlib/libm/machine/arm/feholdexcept.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/feholdexcept.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/fenv-softfp.c
> b/newlib/libm/machine/arm/fenv-softfp.c
> new file mode 100644
> index 000000000..a576cc1b2
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fenv-softfp.c
> @@ -0,0 +1,32 @@
> +/*-
> + * Copyright (c) 2013 Andrew Turner <and...@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 FENV_MANGLE(x) __softfp_ ##x
> +#include <machine/fenv-mangle.h>
> +#include "fenv.c"
> +
> diff --git a/newlib/libm/machine/arm/fenv-vfp.c
> b/newlib/libm/machine/arm/fenv-vfp.c
> new file mode 100644
> index 000000000..297e81296
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fenv-vfp.c
> @@ -0,0 +1,32 @@
> +/*-
> + * Copyright (c) 2013 Andrew Turner <and...@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 FENV_MANGLE(x) __vfp_ ##x
> +#include <machine/fenv-mangle.h>
> +#include "fenv.c"
> +
> diff --git a/newlib/libm/machine/arm/fenv.c
> b/newlib/libm/machine/arm/fenv.c
> new file mode 100644
> index 000000000..5b61ab81f
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fenv.c
> @@ -0,0 +1,328 @@
> +/*-
> + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
> + *
> + * Copyright (c) 2004 David Schultz <d...@freebsd.org>
> + * Copyright (c) 2013 Andrew Turner <and...@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 __fenv_static
> +#include <fenv.h>
> +
> +#include <machine/acle-compat.h>
> +
> +#if __ARM_ARCH >= 6
> +#define FENV_ARMv6
> +#endif
> +
> +/* When SOFTFP_ABI is defined we are using the softfp ABI. */
> +#if defined(__VFP_FP__) && !defined(__ARM_PCS_VFP)
> +#define SOFTFP_ABI
> +#endif
> +
> +
> +#ifndef FENV_MANGLE
> +/*
> + * Hopefully the system ID byte is immutable, so it's valid to use
> + * this as a default environment.
> + */
> +fenv_t __fe_dfl_env = { 0 };
> +
> +const fenv_t *_fe_dfl_env = &__fe_dfl_env;
> +#endif
> +
> +
> +/* If this is a non-mangled softfp version special processing is required
> */
> +#if defined(FENV_MANGLE) || !defined(SOFTFP_ABI) || !defined(FENV_ARMv6)
> +
> +/*
> + * The following macros map between the softfloat emulator's flags and
> + * the hardware's FPSR. The hardware this file was written for doesn't
> + * have rounding control bits, so we stick those in the system ID byte.
> + */
> +#ifndef __ARM_PCS_VFP
> +#define __set_env(env, flags, mask, rnd) env = ((flags)
> \
> + | (mask)<<_FPUSW_SHIFT \
> + | (rnd) << 24)
> +#define __env_flags(env) ((env) & FE_ALL_EXCEPT)
> +#define __env_mask(env) (((env) >> _FPUSW_SHIFT)
> \
> + & FE_ALL_EXCEPT)
> +#define __env_round(env) (((env) >> 24) &
> _ROUND_MASK)
> +
> +#include <machine/fenv-softfloat.h>
> +
> +#else /* __ARM_PCS_VFP PRESENT */
> +
> +#include <machine/fenv-vfp.h>
> +
> +#endif /* __ARM_PCS_VFP */
> +
> +#ifdef __GNUC_GNU_INLINE__
> +#error "This file must be compiled with C99 'inline' semantics"
> +#endif
> +
> +extern inline int feclearexcept(int excepts);
> +extern inline int fegetexceptflag(fexcept_t *flagp, int excepts);
> +extern inline int fesetexceptflag(const fexcept_t *flagp, int excepts);
> +extern inline int feraiseexcept(int excepts);
> +extern inline int fetestexcept(int excepts);
> +extern inline int fegetround(void);
> +extern inline int fesetround(int round);
> +extern inline int fegetenv(fenv_t *envp);
> +extern inline int feholdexcept(fenv_t *envp);
> +extern inline int fesetenv(const fenv_t *envp);
> +extern inline int feupdateenv(const fenv_t *envp);
> +extern inline int feenableexcept(int __mask);
> +extern inline int fedisableexcept(int __mask);
> +extern inline int fegetexcept(void);
> +
> +#else /* !FENV_MANGLE && SOFTFP_ABI */
> +/* Set by libc when the VFP unit is enabled */
> +
> +int _libc_arm_fpu_present;
> +
> +int __softfp_feclearexcept(int excepts);
> +int __softfp_fegetexceptflag(fexcept_t *flagp, int excepts);
> +int __softfp_fesetexceptflag(const fexcept_t *flagp, int excepts);
> +int __softfp_feraiseexcept(int excepts);
> +int __softfp_fetestexcept(int excepts);
> +int __softfp_fegetround(void);
> +int __softfp_fesetround(int round);
> +int __softfp_fegetenv(fenv_t *envp);
> +int __softfp_feholdexcept(fenv_t *envp);
> +int __softfp_fesetenv(const fenv_t *envp);
> +int __softfp_feupdateenv(const fenv_t *envp);
> +int __softfp_feenableexcept(int __mask);
> +int __softfp_fedisableexcept(int __mask);
> +int __softfp_fegetexcept(void);
> +
> +int __vfp_feclearexcept(int excepts);
> +int __vfp_fegetexceptflag(fexcept_t *flagp, int excepts);
> +int __vfp_fesetexceptflag(const fexcept_t *flagp, int excepts);
> +int __vfp_feraiseexcept(int excepts);
> +int __vfp_fetestexcept(int excepts);
> +int __vfp_fegetround(void);
> +int __vfp_fesetround(int round);
> +int __vfp_fegetenv(fenv_t *envp);
> +int __vfp_feholdexcept(fenv_t *envp);
> +int __vfp_fesetenv(const fenv_t *envp);
> +int __vfp_feupdateenv(const fenv_t *envp);
> +int __vfp_feenableexcept(int __mask);
> +int __vfp_fedisableexcept(int __mask);
> +int __vfp_fegetexcept(void);
> +
> +static int
> +__softfp_round_to_vfp(int round)
> +{
> +
> + switch (round) {
> + case FE_TONEAREST:
> + default:
> + return VFP_FE_TONEAREST;
> + case FE_TOWARDZERO:
> + return VFP_FE_TOWARDZERO;
> + case FE_UPWARD:
> + return VFP_FE_UPWARD;
> + case FE_DOWNWARD:
> + return VFP_FE_DOWNWARD;
> + }
> +}
> +
> +static int
> +__softfp_round_from_vfp(int round)
> +{
> +
> + switch (round) {
> + case VFP_FE_TONEAREST:
> + default:
> + return FE_TONEAREST;
> + case VFP_FE_TOWARDZERO:
> + return FE_TOWARDZERO;
> + case VFP_FE_UPWARD:
> + return FE_UPWARD;
> + case VFP_FE_DOWNWARD:
> + return FE_DOWNWARD;
> + }
> +}
> +
> +int feclearexcept(int excepts)
> +{
> +
> + if (_libc_arm_fpu_present)
> + __vfp_feclearexcept(excepts);
> + __softfp_feclearexcept(excepts);
> +
> + return (0);
> +}
> +
> +int fegetexceptflag(fexcept_t *flagp, int excepts)
> +{
> + fexcept_t __vfp_flagp;
> +
> + __vfp_flagp = 0;
> + if (_libc_arm_fpu_present)
> + __vfp_fegetexceptflag(&__vfp_flagp, excepts);
> + __softfp_fegetexceptflag(flagp, excepts);
> +
> + *flagp |= __vfp_flagp;
> +
> + return (0);
> +}
> +
> +int fesetexceptflag(const fexcept_t *flagp, int excepts)
> +{
> +
> + if (_libc_arm_fpu_present)
> + __vfp_fesetexceptflag(flagp, excepts);
> + __softfp_fesetexceptflag(flagp, excepts);
> +
> + return (0);
> +}
> +
> +int feraiseexcept(int excepts)
> +{
> +
> + if (_libc_arm_fpu_present)
> + __vfp_feraiseexcept(excepts);
> + __softfp_feraiseexcept(excepts);
> +
> + return (0);
> +}
> +
> +int fetestexcept(int excepts)
> +{
> + int __got_excepts;
> +
> + __got_excepts = 0;
> + if (_libc_arm_fpu_present)
> + __got_excepts = __vfp_fetestexcept(excepts);
> + __got_excepts |= __softfp_fetestexcept(excepts);
> +
> + return (__got_excepts);
> +}
> +
> +int fegetround(void)
> +{
> +
> + if (_libc_arm_fpu_present)
> + return __softfp_round_from_vfp(__vfp_fegetround());
> + return __softfp_fegetround();
> +}
> +
> +int fesetround(int round)
> +{
> +
> + if (_libc_arm_fpu_present)
> + __vfp_fesetround(__softfp_round_to_vfp(round));
> + __softfp_fesetround(round);
> +
> + return (0);
> +}
> +
> +int fegetenv(fenv_t *envp)
> +{
> + fenv_t __vfp_envp;
> +
> + __vfp_envp = 0;
> + if (_libc_arm_fpu_present)
> + __vfp_fegetenv(&__vfp_envp);
> + __softfp_fegetenv(envp);
> + *envp |= __vfp_envp;
> +
> + return (0);
> +}
> +
> +int feholdexcept(fenv_t *envp)
> +{
> + fenv_t __vfp_envp;
> +
> + __vfp_envp = 0;
> + if (_libc_arm_fpu_present)
> + __vfp_feholdexcept(&__vfp_envp);
> + __softfp_feholdexcept(envp);
> + *envp |= __vfp_envp;
> +
> + return (0);
> +}
> +
> +int fesetenv(const fenv_t *envp)
> +{
> +
> + if (_libc_arm_fpu_present)
> + __vfp_fesetenv(envp);
> + __softfp_fesetenv(envp);
> +
> + return (0);
> +}
> +
> +int feupdateenv(const fenv_t *envp)
> +{
> +
> + if (_libc_arm_fpu_present)
> + __vfp_feupdateenv(envp);
> + __softfp_feupdateenv(envp);
> +
> + return (0);
> +}
> +
> +int feenableexcept(int __mask)
> +{
> + int __unmasked;
> +
> + __unmasked = 0;
> + if (_libc_arm_fpu_present)
> + __unmasked = __vfp_feenableexcept(__mask);
> + __unmasked |= __softfp_feenableexcept(__mask);
> +
> + return (__unmasked);
> +}
> +
> +int fedisableexcept(int __mask)
> +{
> + int __unmasked;
> +
> + __unmasked = 0;
> + if (_libc_arm_fpu_present)
> + __unmasked = __vfp_fedisableexcept(__mask);
> + __unmasked |= __softfp_fedisableexcept(__mask);
> +
> + return (__unmasked);
> +}
> +
> +int fegetexcept(void)
> +{
> + int __unmasked;
> +
> + __unmasked = 0;
> + if (_libc_arm_fpu_present)
> + __unmasked = __vfp_fegetexcept();
> + __unmasked |= __softfp_fegetexcept();
> +
> + return (__unmasked);
> +}
> +
> +#endif
> +
> diff --git a/newlib/libm/machine/arm/feraiseexcept.c
> b/newlib/libm/machine/arm/feraiseexcept.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/feraiseexcept.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/fesetenv.c
> b/newlib/libm/machine/arm/fesetenv.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fesetenv.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/fesetexceptflag.c
> b/newlib/libm/machine/arm/fesetexceptflag.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fesetexceptflag.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/fesetround.c
> b/newlib/libm/machine/arm/fesetround.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fesetround.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/fetestexcept.c
> b/newlib/libm/machine/arm/fetestexcept.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/fetestexcept.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> diff --git a/newlib/libm/machine/arm/feupdateenv.c
> b/newlib/libm/machine/arm/feupdateenv.c
> new file mode 100644
> index 000000000..8cbee7771
> --- /dev/null
> +++ b/newlib/libm/machine/arm/feupdateenv.c
> @@ -0,0 +1,7 @@
> +/*
> + * SPDX-License-Identifier: BSD-2-Clause
> + *
> + * (c) Copyright 2019 Joel Sherrill <j...@rtems.org>
> + */
> +
> +#include "../../fenv/fenv_stub.c"
> --
> 2.17.1
>
>
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