Merge pull request #181 from CDLuminate/mipsport

Updated MIPS port
2024-12-28 04:23:41 +01:00 · 2018-06-18 16:01:04 -04:00 · 2018-06-18 16:01:04 -04:00 · 73b3d88ef1
commit 73b3d88ef1
parent 3aa5c3bc47 a4b3fdeb76
10 changed files with 628 additions and 1 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -69,5 +69,38 @@ matrix:
                      - libc6-dev-ppc64el-cross
                      - qemu-user-static
                      - binfmt-support
+
+        - os: linux
+          env: FLAGS="CC=mips-linux-gnu-gcc" TEST_FLAGS="LDFLAGS=-static"
+          addons:
+              apt:
+                  sources:
+                      - sourceline: "deb http://archive.ubuntu.com/ubuntu/ xenial main universe"
+                  packages:
+                      - gcc-mips-linux-gnu
+                      - libc6-dev-mips-cross
+                      - qemu-user-binfmt
+
+        - os: linux
+          env: FLAGS="CC=mipsel-linux-gnu-gcc" TEST_FLAGS="LDFLAGS=-static"
+          addons:
+              apt:
+                  sources:
+                      - sourceline: "deb http://archive.ubuntu.com/ubuntu/ xenial main universe"
+                  packages:
+                      - gcc-mipsel-linux-gnu
+                      - libc6-dev-mipsel-cross
+                      - qemu-user-binfmt
+
+        - os: linux
+          env: FLAGS="CC=mips64el-linux-gnuabi64-gcc" TEST_FLAGS="LDFLAGS=-static"
+          addons:
+              apt:
+                  sources:
+                      - sourceline: "deb http://archive.ubuntu.com/ubuntu/ xenial main universe"
+                  packages:
+                      - gcc-mips64el-linux-gnuabi64
+                      - libc6-dev-mips64el-cross
+                      - qemu-user-binfmt
 notifications:
    email: false
--- a/Make.inc
+++ b/Make.inc
@ -67,6 +67,9 @@ endif
 ifeq ($(ARCH),x86_64)
 override ARCH := amd64
 endif
+ifeq ($(findstring mips,$(ARCH)),mips)
+override ARCH := mips
+endif

 # If CFLAGS does not contain a -O optimization flag, default to -O3
 ifeq ($(findstring -O,$(CFLAGS)),)
--- a/2
+++ b/2
@ -72,7 +72,7 @@ test/test-float: libopenlibm.$(OLM_MAJOR_MINOR_SHLIB_EXT)
 	$(MAKE) -C test test-float

 clean:
-	rm -f aarch64/*.o amd64/*.o arm/*.o bsdsrc/*.o i387/*.o ld80/*.o ld128/*.o src/*.o powerpc/*.o
+	rm -f aarch64/*.o amd64/*.o arm/*.o bsdsrc/*.o i387/*.o ld80/*.o ld128/*.o src/*.o powerpc/*.o mips/*.o
 	rm -f libopenlibm.a libopenlibm.*$(SHLIB_EXT)*
 	$(MAKE) -C test clean

--- a/include/openlibm_fenv.h
+++ b/include/openlibm_fenv.h
@ -10,6 +10,8 @@
 #include <openlibm_fenv_i387.h>
 #elif defined(__powerpc__)
 #include <openlibm_fenv_powerpc.h>
+#elif defined(__mips__)
+#include <openlibm_fenv_mips.h>
 #else
 #error "Unsupported platform"
 #endif
--- a/include/openlibm_fenv_mips.h
+++ b/include/openlibm_fenv_mips.h
@ -0,0 +1,278 @@
+/*-
+ * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_FENV_H_
+#define	_FENV_H_
+
+#include <stdint.h>
+#include "cdefs-compat.h"
+
+#ifndef	__fenv_static
+#define	__fenv_static	static
+#endif
+
+typedef	uint32_t	fenv_t;
+typedef	uint32_t	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)
+__BEGIN_DECLS
+
+/* 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)
+
+#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
+
+#ifdef __mips_soft_float
+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);
+#else
+__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 __round)
+{
+	fexcept_t fcsr;
+
+	if (__round & ~_ROUND_MASK)
+		return (-1);
+
+	__cfc1(fcsr);
+	fcsr &= ~_ROUND_MASK;
+	fcsr |= __round;
+	__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);
+}
+#endif /* !__mips_soft_float */
+
+#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 */
+
+__END_DECLS
+
+#endif	/* !_FENV_H_ */
--- a/mips/Make.files
+++ b/mips/Make.files
@ -0,0 +1 @@
+$(CUR_SRCS) = fenv.c
--- a/mips/fenv-softfloat.h
+++ b/mips/fenv-softfloat.h
@ -0,0 +1,184 @@
+/*-
+ * Copyright (c) 2004-2011 David Schultz <das@FreeBSD.ORG>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_FENV_H_
+#error "This file is meant to be included only by <fenv.h>."
+#endif
+
+/*
+ * 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.
+ */
+
+extern int __softfloat_float_exception_flags;
+extern int __softfloat_float_exception_mask;
+extern int __softfloat_float_rounding_mode;
+void __softfloat_float_raise(int);
+
+__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)
+{
+
+	__softfloat_float_raise(__excepts);
+	return (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 */
--- a/mips/fenv.c
+++ b/mips/fenv.c
@ -0,0 +1,67 @@
+/*-
+ * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#define	__fenv_static
+#include "openlibm_fenv.h"
+
+#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.
+ */
+const fenv_t __fe_dfl_env = 0;
+
+#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 "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 __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);
+
--- a/src/fpmath.h
+++ b/src/fpmath.h
@ -39,6 +39,8 @@
 #endif
 #elif defined(__powerpc__)
 #include "powerpc_fpmath.h"
+#elif defined(__mips__)
+#include "mips_fpmath.h"
 #endif

 /* Definitions provided directly by GCC and Clang. */
--- a/src/mips_fpmath.h
+++ b/src/mips_fpmath.h
@ -0,0 +1,57 @@
+/*-
+ * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+union IEEEl2bits {
+	long double	e;
+	struct {
+#ifndef __MIPSEB__
+		unsigned int	manl	:32;
+		unsigned int	manh	:20;
+		unsigned int	exp	:11;
+		unsigned int	sign	:1;
+#else
+		unsigned int		sign	:1;
+		unsigned int		exp	:11;
+		unsigned int		manh	:20;
+		unsigned int		manl	:32;
+#endif
+	} bits;
+};
+
+#define	LDBL_NBIT	0
+#define	mask_nbit_l(u)	((void)0)
+#define	LDBL_IMPLICIT_NBIT
+
+#define	LDBL_MANH_SIZE	20
+#define	LDBL_MANL_SIZE	32
+
+#define	LDBL_TO_ARRAY32(u, a) do {			\
+	(a)[0] = (uint32_t)(u).bits.manl;		\
+	(a)[1] = (uint32_t)(u).bits.manh;		\
+} while(0)
+