[PATCH] mips fenv support
Eshan dhawan
eshandhawan51 at gmail.com
Thu Jun 11 20:43:08 UTC 2020
This Patch adds fenv support for mips
The implementation files are taken from FreeBSD
Signed-off-by: Eshan dhawan <eshandhawan51 at gmail.com>
---
newlib/configure.host | 1 +
newlib/libc/machine/mips/machine/fenv-fp.h | 207 ++++++++++++++++++
.../machine/mips/machine/fenv-softfloat.h | 182 +++++++++++++++
newlib/libc/machine/mips/sys/fenv.h | 88 ++++++++
newlib/libm/machine/configure.in | 1 +
newlib/libm/machine/mips/Makefile.am | 21 ++
newlib/libm/machine/mips/configure.in | 11 +
newlib/libm/machine/mips/feclearexcept.c | 7 +
newlib/libm/machine/mips/fegetenv.c | 7 +
newlib/libm/machine/mips/fegetexceptflag.c | 7 +
newlib/libm/machine/mips/fegetround.c | 7 +
newlib/libm/machine/mips/feholdexcept.c | 7 +
newlib/libm/machine/mips/fenv.c | 74 +++++++
newlib/libm/machine/mips/feraiseexcept.c | 7 +
newlib/libm/machine/mips/fesetenv.c | 7 +
newlib/libm/machine/mips/fesetexceptflag.c | 7 +
newlib/libm/machine/mips/fesetround.c | 7 +
newlib/libm/machine/mips/fetestexcept.c | 7 +
newlib/libm/machine/mips/feupdateenv.c | 7 +
19 files changed, 662 insertions(+)
create mode 100644 newlib/libc/machine/mips/machine/fenv-fp.h
create mode 100644 newlib/libc/machine/mips/machine/fenv-softfloat.h
create mode 100644 newlib/libc/machine/mips/sys/fenv.h
create mode 100644 newlib/libm/machine/mips/Makefile.am
create mode 100644 newlib/libm/machine/mips/configure.in
create mode 100644 newlib/libm/machine/mips/feclearexcept.c
create mode 100644 newlib/libm/machine/mips/fegetenv.c
create mode 100644 newlib/libm/machine/mips/fegetexceptflag.c
create mode 100644 newlib/libm/machine/mips/fegetround.c
create mode 100644 newlib/libm/machine/mips/feholdexcept.c
create mode 100644 newlib/libm/machine/mips/fenv.c
create mode 100644 newlib/libm/machine/mips/feraiseexcept.c
create mode 100644 newlib/libm/machine/mips/fesetenv.c
create mode 100644 newlib/libm/machine/mips/fesetexceptflag.c
create mode 100644 newlib/libm/machine/mips/fesetround.c
create mode 100644 newlib/libm/machine/mips/fetestexcept.c
create mode 100644 newlib/libm/machine/mips/feupdateenv.c
diff --git a/newlib/configure.host b/newlib/configure.host
index a84c0c80a..dc6cff1aa 100644
--- a/newlib/configure.host
+++ b/newlib/configure.host
@@ -246,6 +246,7 @@ case "${host_cpu}" in
machine_dir=mep
;;
mips*)
+ libm_machine_dir=mips
machine_dir=mips
;;
mmix)
diff --git a/newlib/libc/machine/mips/machine/fenv-fp.h b/newlib/libc/machine/mips/machine/fenv-fp.h
new file mode 100644
index 000000000..5f446e395
--- /dev/null
+++ b/newlib/libc/machine/mips/machine/fenv-fp.h
@@ -0,0 +1,207 @@
+/*-
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+__fenv_static inline int
+feclearexcept(int excepts)
+{
+ fexcept_t fcsr;
+
+ excepts &= FE_ALL_EXCEPT;
+ __cfc1(fcsr);
+ fcsr &= ~(excepts | (excepts << _FCSR_CAUSE_SHIFT));
+ __ctc1(fcsr);
+
+ return (0);
+}
+
+__fenv_static inline int
+fegetexceptflag(fexcept_t *flagp, int excepts)
+{
+ fexcept_t fcsr;
+
+ excepts &= FE_ALL_EXCEPT;
+ __cfc1(fcsr);
+ *flagp = fcsr & excepts;
+
+ return (0);
+}
+
+__fenv_static inline int
+fesetexceptflag(const fexcept_t *flagp, int excepts)
+{
+ fexcept_t fcsr;
+
+ excepts &= FE_ALL_EXCEPT;
+ __cfc1(fcsr);
+ fcsr &= ~excepts;
+ fcsr |= *flagp & excepts;
+ __ctc1(fcsr);
+
+ return (0);
+}
+
+__fenv_static inline int
+feraiseexcept(int excepts)
+{
+ fexcept_t fcsr;
+
+ excepts &= FE_ALL_EXCEPT;
+ __cfc1(fcsr);
+ fcsr |= excepts | (excepts << _FCSR_CAUSE_SHIFT);
+ __ctc1(fcsr);
+
+ return (0);
+}
+
+__fenv_static inline int
+fetestexcept(int excepts)
+{
+ fexcept_t fcsr;
+
+ excepts &= FE_ALL_EXCEPT;
+ __cfc1(fcsr);
+
+ return (fcsr & excepts);
+}
+
+__fenv_static inline int
+fegetround(void)
+{
+ fexcept_t fcsr;
+
+ __cfc1(fcsr);
+
+ return (fcsr & _ROUND_MASK);
+}
+
+__fenv_static inline int
+fesetround(int rounding_mode)
+{
+ fexcept_t fcsr;
+
+ if (rounding_mode & ~_ROUND_MASK)
+ return (-1);
+
+ __cfc1(fcsr);
+ fcsr &= ~_ROUND_MASK;
+ fcsr |= rounding_mode;
+ __ctc1(fcsr);
+
+ return (0);
+}
+
+__fenv_static inline int
+fegetenv(fenv_t *envp)
+{
+
+ __cfc1(*envp);
+
+ return (0);
+}
+
+__fenv_static inline int
+feholdexcept(fenv_t *envp)
+{
+ fexcept_t fcsr;
+
+ __cfc1(fcsr);
+ *envp = fcsr;
+ fcsr &= ~(FE_ALL_EXCEPT | _ENABLE_MASK);
+ __ctc1(fcsr);
+
+ return (0);
+}
+
+__fenv_static inline int
+fesetenv(const fenv_t *envp)
+{
+
+ __ctc1(*envp);
+
+ return (0);
+}
+
+__fenv_static inline int
+feupdateenv(const fenv_t *envp)
+{
+ fexcept_t fcsr;
+
+ __cfc1(fcsr);
+ fesetenv(envp);
+ feraiseexcept(fcsr);
+
+ return (0);
+}
+#if __BSD_VISIBLE
+
+/* We currently provide no external definitions of the functions below. */
+
+#ifdef __mips_soft_float
+int feenableexcept(int __mask);
+int fedisableexcept(int __mask);
+int fegetexcept(void);
+#else
+static inline int
+feenableexcept(int __mask)
+{
+ fenv_t __old_fcsr, __new_fcsr;
+
+ __cfc1(__old_fcsr);
+ __new_fcsr = __old_fcsr | (__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT;
+ __ctc1(__new_fcsr);
+
+ return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
+}
+
+static inline int
+fedisableexcept(int __mask)
+{
+ fenv_t __old_fcsr, __new_fcsr;
+
+ __cfc1(__old_fcsr);
+ __new_fcsr = __old_fcsr & ~((__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT);
+ __ctc1(__new_fcsr);
+
+ return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
+}
+
+static inline int
+fegetexcept(void)
+{
+ fexcept_t fcsr;
+
+ __cfc1(fcsr);
+
+ return ((fcsr & _ENABLE_MASK) >> _ENABLE_SHIFT);
+}
+
+#endif /* !__mips_soft_float */
+
+#endif /* __BSD_VISIBLE */
\ No newline at end of file
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 000000000..cf13e73fc
--- /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 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * 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 */
diff --git a/newlib/libc/machine/mips/sys/fenv.h b/newlib/libc/machine/mips/sys/fenv.h
new file mode 100644
index 000000000..282d68c49
--- /dev/null
+++ b/newlib/libc/machine/mips/sys/fenv.h
@@ -0,0 +1,88 @@
+/*-
+ * 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_
+
+#include <sys/_types.h>
+
+#ifndef __fenv_static
+#define __fenv_static static
+#endif
+
+typedef int fenv_t;
+typedef int fexcept_t;
+
+/* Exception flags */
+#ifdef __mips_soft_float
+#define _FPUSW_SHIFT 16
+#define FE_INVALID 0x0001
+#define FE_DIVBYZERO 0x0002
+#define FE_OVERFLOW 0x0004
+#define FE_UNDERFLOW 0x0008
+#define FE_INEXACT 0x0010
+#else
+#define _FCSR_CAUSE_SHIFT 10
+#define FE_INVALID 0x0040
+#define FE_DIVBYZERO 0x0020
+#define FE_OVERFLOW 0x0010
+#define FE_UNDERFLOW 0x0008
+#define FE_INEXACT 0x0004
+#endif
+#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
+ FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
+
+/* Rounding modes */
+#define FE_TONEAREST 0x0000
+#define FE_TOWARDZERO 0x0001
+#define FE_UPWARD 0x0002
+#define FE_DOWNWARD 0x0003
+#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 */
+#define _ENABLE_SHIFT 5
+#define _ENABLE_MASK (FE_ALL_EXCEPT << _ENABLE_SHIFT)
+
+#if !defined(__mips_soft_float) && !defined(__mips_hard_float)
+#error compiler didnt set soft/hard float macros
+#endif
+
+#ifndef __mips_soft_float
+#define __cfc1(__fcsr) __asm __volatile("cfc1 %0, $31" : "=r" (__fcsr))
+#define __ctc1(__fcsr) __asm __volatile("ctc1 %0, $31" :: "r" (__fcsr))
+#endif
+
+#endif /* !_FENV_H_ */
diff --git a/newlib/libm/machine/configure.in b/newlib/libm/machine/configure.in
index d4635214a..2cfbec666 100644
--- a/newlib/libm/machine/configure.in
+++ b/newlib/libm/machine/configure.in
@@ -33,6 +33,7 @@ if test -n "${libm_machine_dir}"; then
spu) AC_CONFIG_SUBDIRS(spu) ;;
riscv) AC_CONFIG_SUBDIRS(riscv) ;;
x86_64) AC_CONFIG_SUBDIRS(x86_64) ;;
+ mips) AC_CONFIG_SUBDIRS(mips) ;;
esac;
if test "${use_libtool}" = "yes"; then
machlib=${libm_machine_dir}/lib${libm_machine_dir}.${aext}
diff --git a/newlib/libm/machine/mips/Makefile.am b/newlib/libm/machine/mips/Makefile.am
new file mode 100644
index 000000000..bb142a6ce
--- /dev/null
+++ b/newlib/libm/machine/mips/Makefile.am
@@ -0,0 +1,21 @@
+## Process this file with automake to generate Makefile.in
+
+INCLUDES = -I $(newlib_basedir)/../newlib/libm/common $(NEWLIB_CFLAGS) \
+ $(CROSS_CFLAGS) $(TARGET_CFLAGS)
+
+LIB_SOURCES = \
+ feclearexcept.c fegetenv.c fegetexceptflag.c \
+ fegetround.c feholdexcept.c feraiseexcept.c fesetenv.c \
+ fesetexceptflag.c fesetround.c fetestexcept.c feupdateenv.c \
+ fenv.c
+
+noinst_LIBRARIES = lib.a
+lib_a_SOURCES = $(LIB_SOURCES)
+lib_a_CFLAGS = $(AM_CFLAGS)
+lib_a_CCASFLAGS = $(AM_CCASFLAGS)
+noinst_DATA =
+
+include $(srcdir)/../../../Makefile.shared
+
+ACLOCAL_AMFLAGS = -I ../../.. -I ../../../..
+CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host
diff --git a/newlib/libm/machine/mips/configure.in b/newlib/libm/machine/mips/configure.in
new file mode 100644
index 000000000..7a22fa31c
--- /dev/null
+++ b/newlib/libm/machine/mips/configure.in
@@ -0,0 +1,11 @@
+
+AC_PREREQ(2.59)
+AC_INIT([newlib],[NEWLIB_VERSION])
+AC_CONFIG_SRCDIR([Makefile.am])
+
+AC_CONFIG_AUX_DIR(../../../..)
+
+NEWLIB_CONFIGURE(../../..)
+
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT
diff --git a/newlib/libm/machine/mips/feclearexcept.c b/newlib/libm/machine/mips/feclearexcept.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/fegetenv.c b/newlib/libm/machine/mips/fegetenv.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/fegetexceptflag.c b/newlib/libm/machine/mips/fegetexceptflag.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/fegetround.c b/newlib/libm/machine/mips/fegetround.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/feholdexcept.c b/newlib/libm/machine/mips/feholdexcept.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/fenv.c b/newlib/libm/machine/mips/fenv.c
new file mode 100644
index 000000000..6e4bb8f33
--- /dev/null
+++ b/newlib/libm/machine/mips/fenv.c
@@ -0,0 +1,74 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2004 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 __fenv_static
+#include <fenv.h>
+#ifndef __mips_soft_float
+#include <machine/fenv-fp.h>
+#endif
+
+
+#ifdef __GNUC_GNU_INLINE__
+#error "This file must be compiled with C99 'inline' semantics"
+#endif
+
+/*
+ * Hopefully the system ID byte is immutable, so it's valid to use
+ * this as a default environment.
+ */
+
+
+#ifdef __mips_soft_float
+#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>
+#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 rounding_mode);
+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);
diff --git a/newlib/libm/machine/mips/feraiseexcept.c b/newlib/libm/machine/mips/feraiseexcept.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/fesetenv.c b/newlib/libm/machine/mips/fesetenv.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/fesetexceptflag.c b/newlib/libm/machine/mips/fesetexceptflag.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/fesetround.c b/newlib/libm/machine/mips/fesetround.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/fetestexcept.c b/newlib/libm/machine/mips/fetestexcept.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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/mips/feupdateenv.c b/newlib/libm/machine/mips/feupdateenv.c
new file mode 100644
index 000000000..8cbee7771
--- /dev/null
+++ b/newlib/libm/machine/mips/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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