[PATCH] fenv support arm
Eshan dhawan
eshandhawan51 at gmail.com
Tue Jun 2 00:09:57 UTC 2020
This patch adds support for ARM fenv to newlib
the files are taken from FreeBSD
Signed-off-by: Eshan dhawan <eshandhawan51 at 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 <andrew at 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 <das at 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 <das at 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 <das at 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 <joel at 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 <joel at 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 <joel at 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 <joel at 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 <joel at 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 <joel at 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 <andrew at 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 <andrew at 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 <das at FreeBSD.ORG>
+ * Copyright (c) 2013 Andrew Turner <andrew at 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 <joel at 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 <joel at 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 <joel at 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 <joel at 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 <joel at 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 <joel at rtems.org>
+ */
+
+#include "../../fenv/fenv_stub.c"
--
2.17.1
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