initial import

37 files changed, 798 insertions, 0 deletions

diff --git a/sysdeps/m68k/fpu/Makefile b/sysdeps/m68k/fpu/Makefile
new file mode 100644
index 0000000000..42db6381d3
--- /dev/null
+++ b/sysdeps/m68k/fpu/Makefile
@@ -0,0 +1,11 @@
+ifeq	($(subdir),math)
+ifndef	math-twiddled
+
+# Avoid twiddling in generic/Makefile.
+math-twiddled := t
+
+endif
+
+bsdmath_dirs := $(bsdmath_dirs) mc68881
+
+endif
diff --git a/sysdeps/m68k/fpu/__math.h b/sysdeps/m68k/fpu/__math.h
new file mode 100644
index 0000000000..a9ae2d966c
--- /dev/null
+++ b/sysdeps/m68k/fpu/__math.h
@@ -0,0 +1,168 @@
+/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#ifdef	__GNUC__
+
+#include <sys/cdefs.h>
+
+#ifdef	__NO_MATH_INLINES
+/* This is used when defining the functions themselves.  Define them with
+   __ names, and with `static inline' instead of `extern inline' so the
+   bodies will always be used, never an external function call.  */
+#define	__m81_u(x)	__CONCAT(__,x)
+#define __m81_inline	static __inline
+#else
+#define	__m81_u(x)	x
+#define __m81_inline	exter __inline
+#define	__MATH_INLINES	1
+#endif
+
+#define	__inline_mathop2(func, op)					      \
+  __m81_inline __CONSTVALUE double					      \
+  __m81_u(func)(double __mathop_x)					      \
+  {									      \
+    double __result;							      \
+    __asm("f" __STRING(op) "%.x %1, %0" : "=f" (__result) : "f" (__mathop_x));\
+    return __result;							      \
+  }
+#define	__inline_mathop(op)		__inline_mathop2(op, op)
+
+__inline_mathop(acos)
+__inline_mathop(asin)
+__inline_mathop(atan)
+__inline_mathop(cos)
+__inline_mathop(sin)
+__inline_mathop(tan)
+__inline_mathop(cosh)
+__inline_mathop(sinh)
+__inline_mathop(tanh)
+__inline_mathop2(exp, etox)
+__inline_mathop2(fabs, abs)
+__inline_mathop(log10)
+__inline_mathop2(log, logn)
+__inline_mathop2(floor, intrz)
+__inline_mathop(sqrt)
+
+__inline_mathop2(__rint, int)
+__inline_mathop2(__expm1, etoxm1)
+
+#ifdef	__USE_MISC
+__inline_mathop2(rint, int)
+__inline_mathop2(expm1, etoxm1)
+__inline_mathop2(log1p, lognp1)
+__inline_mathop(atanh)
+#endif
+
+__m81_inline __CONSTVALUE double
+__m81_u(__drem)(double __x, double __y)
+{
+  double __result;
+  __asm("frem%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
+  return __result;
+}
+
+__m81_inline __CONSTVALUE double
+__m81_u(ldexp)(double __x, int __e)
+{
+  double __result;
+  double __double_e = (double) __e;
+  __asm("fscale%.x %1, %0" : "=f" (__result) : "f" (__double_e), "0" (__x));
+  return __result;
+}
+
+__m81_inline __CONSTVALUE double
+__m81_u(fmod)(double __x, double __y)
+{
+  double __result;
+  __asm("fmod%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
+  return __result;
+}
+
+__m81_inline double
+__m81_u(frexp)(double __value, int *__expptr)
+{
+  double __mantissa, __exponent;
+  __asm("fgetexp%.x %1, %0" : "=f" (__exponent) : "f" (__value));
+  __asm("fgetman%.x %1, %0" : "=f" (__mantissa) : "f" (__value));
+  *__expptr = (int) __exponent;
+  return __mantissa;
+}
+
+__m81_inline __CONSTVALUE double
+__m81_u(pow)(double __x, double __y)
+{
+  double __result;
+  if (__y == 0.0 || __x == 1.0)
+    __result = 1.0;
+  else if (__y == 1.0)
+    __result = __x;
+  else if (__y == 2.0)
+    __result = __x * __x;
+  else if (__x == 10.0)
+    __asm("ftentox%.x %1, %0" : "=f" (__result) : "f" (__y));
+  else if (__x == 2.0)
+    __asm("ftwotox%.x %1, %0" : "=f" (__result) : "f" (__y));
+  else
+    __result = __m81_u(exp)(__y * __m81_u(log)(__x));
+  return __result;
+}
+
+__m81_inline __CONSTVALUE double
+__m81_u(ceil)(double __x)
+{
+  double __result;
+  unsigned long int __ctrl_reg;
+  __asm("fmove%.l fpcr, %0" : "=g" (__ctrl_reg));
+  /* Set rounding towards positive infinity.  */
+  __asm("fmove%.l %0, fpcr" : /* No outputs.  */ : "g" (__ctrl_reg | 0x30));
+  /* Convert X to an integer, using +Inf rounding.  */
+  __asm("fint%.x %1, %0" : "=f" (__result) : "f" (__x));
+  /* Restore the previous rounding mode.  */
+  __asm("fmove%.l %0, fpcr" : /* No outputs.  */ : "g" (__ctrl_reg));
+  return __result;
+}
+
+__m81_inline double
+__m81_u(modf)(double __value, double *__iptr)
+{
+  double __modf_int = __m81_u(floor)(__value);
+  *__iptr = __modf_int;
+  return __value - __modf_int;
+}
+
+__m81_inline __CONSTVALUE int
+__m81_u(__isinf)(double __value)
+{
+  /* There is no branch-condition for infinity,
+     so we must extract and examine the condition codes manually.  */
+  unsigned long int __fpsr;
+  __asm("ftst%.x %1\n"
+	"fmove%.l fpsr, %0" : "=g" (__fpsr) : "f" (__value));
+  return (__fpsr & (2 << (3 * 8))) ? (__value < 0 ? -1 : 1) : 0;
+}
+
+__m81_inline __CONSTVALUE int
+__m81_u(__isnan)(double __value)
+{
+  char __result;
+  __asm("ftst%.x %1\n"
+	"fsun %0" : "=g" (__result) : "f" (__value));
+  return __result;
+}
+
+#endif	/* GCC.  */
diff --git a/sysdeps/m68k/fpu/acos.c b/sysdeps/m68k/fpu/acos.c
new file mode 100644
index 0000000000..d4be88f17c
--- /dev/null
+++ b/sysdeps/m68k/fpu/acos.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 1991, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#define	__NO_MATH_INLINES
+#include <math.h>
+
+#ifndef	FUNC
+#define	FUNC	acos
+#endif
+
+
+__CONSTVALUE double
+DEFUN(FUNC, (x), double x)
+{
+  return __m81_u(FUNC)(x);
+}
diff --git a/sysdeps/m68k/fpu/asin.c b/sysdeps/m68k/fpu/asin.c
new file mode 100644
index 0000000000..0e3e58f697
--- /dev/null
+++ b/sysdeps/m68k/fpu/asin.c
@@ -0,0 +1,2 @@
+#define	FUNC	asin
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/atan.c b/sysdeps/m68k/fpu/atan.c
new file mode 100644
index 0000000000..b9d428e170
--- /dev/null
+++ b/sysdeps/m68k/fpu/atan.c
@@ -0,0 +1,2 @@
+#define	FUNC	atan
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/atan2.c b/sysdeps/m68k/fpu/atan2.c
new file mode 100644
index 0000000000..1efdb1f7a6
--- /dev/null
+++ b/sysdeps/m68k/fpu/atan2.c
@@ -0,0 +1,71 @@
+/* Copyright (C) 1991, 1992, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <math.h>
+
+#ifdef	__GNUC__
+
+__CONSTVALUE double
+DEFUN(atan2, (y, x), double y AND double x)
+{
+  static CONST double one = 1.0, zero = 0.0;
+  double signx, signy;
+  double pi, PIo4, PIo2;
+
+  if (__isnan(x))
+    return x;
+  if (__isnan(y))
+    return y;
+
+  signy = __copysign(one, y);
+  signx = __copysign(one, x);
+
+  asm("fmovecr%.x %1, %0" : "=f" (pi) : "i" (0));
+  PIo2 = pi / 2;
+  PIo4 = pi / 4;
+
+  if (y == zero)
+    return signx == one ? y : __copysign(pi, signy);
+
+  if (x == zero)
+    return __copysign(PIo2, signy);
+
+  if (__isinf(x))
+    {
+      if (__isinf(y))
+	return __copysign(signx == one ? PIo4 : 3 * PIo4, signy);
+      else
+	return __copysign(signx == one ? zero : pi, signy);
+    }
+
+  if (__isinf(y))
+    return __copysign(PIo2, signy);
+
+  y = fabs(y);
+
+  if (x < 0.0)
+    /* X is negative.  */
+    return __copysign(pi - atan(y / -x), signy);
+
+  return __copysign(atan(y / x), signy);
+}
+
+#else
+#include <sysdeps/generic/atan2.c>
+#endif
diff --git a/sysdeps/m68k/fpu/atanh.c b/sysdeps/m68k/fpu/atanh.c
new file mode 100644
index 0000000000..d4636ec035
--- /dev/null
+++ b/sysdeps/m68k/fpu/atanh.c
@@ -0,0 +1,2 @@
+#define	FUNC	atanh
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/ceil.c b/sysdeps/m68k/fpu/ceil.c
new file mode 100644
index 0000000000..b4605e1b29
--- /dev/null
+++ b/sysdeps/m68k/fpu/ceil.c
@@ -0,0 +1,4 @@
+
+#define	FUNC	ceil
+
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/cos.c b/sysdeps/m68k/fpu/cos.c
new file mode 100644
index 0000000000..fa50130af7
--- /dev/null
+++ b/sysdeps/m68k/fpu/cos.c
@@ -0,0 +1,2 @@
+#define	FUNC	cos
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/cosh.c b/sysdeps/m68k/fpu/cosh.c
new file mode 100644
index 0000000000..78a81943c6
--- /dev/null
+++ b/sysdeps/m68k/fpu/cosh.c
@@ -0,0 +1,2 @@
+#define	FUNC	cosh
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/drem.c b/sysdeps/m68k/fpu/drem.c
new file mode 100644
index 0000000000..16caacfd81
--- /dev/null
+++ b/sysdeps/m68k/fpu/drem.c
@@ -0,0 +1,31 @@
+/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#define	__NO_MATH_INLINES
+#include <math.h>
+
+#undef	drem
+
+double
+DEFUN(__drem, (x, y), double x AND double y)
+{
+  return ____drem(x, y);
+}
+
+weak_alias (__drem, drem)
diff --git a/sysdeps/m68k/fpu/exp.c b/sysdeps/m68k/fpu/exp.c
new file mode 100644
index 0000000000..2649d72143
--- /dev/null
+++ b/sysdeps/m68k/fpu/exp.c
@@ -0,0 +1,3 @@
+#define	FUNC	exp
+#define	OP	etox
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/expm1.c b/sysdeps/m68k/fpu/expm1.c
new file mode 100644
index 0000000000..19f1802e56
--- /dev/null
+++ b/sysdeps/m68k/fpu/expm1.c
@@ -0,0 +1,3 @@
+#define	FUNC	__expm1
+#define	OP	expm1
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/fabs.c b/sysdeps/m68k/fpu/fabs.c
new file mode 100644
index 0000000000..f9538a599c
--- /dev/null
+++ b/sysdeps/m68k/fpu/fabs.c
@@ -0,0 +1,3 @@
+#define	FUNC	fabs
+#define	OP	abs
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/fl.h b/sysdeps/m68k/fpu/fl.h
new file mode 100644
index 0000000000..098e880601
--- /dev/null
+++ b/sysdeps/m68k/fpu/fl.h
@@ -0,0 +1,41 @@
+/* Floating-point constants for the 68881.
+   Copyright (C) 1992 Free Software Foundation, Inc.  */
+
+/* IGNORE($ This is used internally in the library.  */
+#include <sysdeps/ieee754/fl.h>
+/* ansidecl.m4 here inserts the ieee file.  Kludge o rama.
+   $) ENDCOMMENT INCLUDE($sysdeps/ieee754/fl.h$) STARTCOMMENT */
+
+#ifndef	__need_HUGE_VAL
+
+#ifdef	__GNUC__
+
+#undef	FLT_ROUNDS
+
+/* Interrogate the 68881 to find the current rounding mode.  */
+
+static __const __inline int
+DEFUN_VOID(__flt_rounds)
+{
+  unsigned long int __fpcr;
+  __asm("fmove%.l fpcr, %0" : "=g" (__fpcr));
+  switch (__fpcr & (1 | 2))
+    {
+    case 0:
+      return _FLT_ROUNDS_TONEAREST;
+    case 1:
+      return _FLT_ROUNDS_TOZERO;
+    case 2:
+      return _FLT_ROUNDS_TONEGINF;
+    case 3:
+      return _FLT_ROUNDS_TOPOSINF;
+    default:
+      return _FLT_ROUNDS_INDETERMINATE;
+    }
+}
+
+#define	FLT_ROUNDS	(__flt_rounds())
+
+#endif	/* GCC.  */
+
+#endif	/* Don't need HUGE_VAL.  */
diff --git a/sysdeps/m68k/fpu/floor.c b/sysdeps/m68k/fpu/floor.c
new file mode 100644
index 0000000000..92a2ca68bb
--- /dev/null
+++ b/sysdeps/m68k/fpu/floor.c
@@ -0,0 +1,3 @@
+#define	FUNC	floor
+#define	OP	intrz
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/fmod.c b/sysdeps/m68k/fpu/fmod.c
new file mode 100644
index 0000000000..9a6c8cd162
--- /dev/null
+++ b/sysdeps/m68k/fpu/fmod.c
@@ -0,0 +1,27 @@
+/* Copyright (C) 1991, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#define	__NO_MATH_INLINES
+#include <math.h>
+
+__CONSTVALUE double
+DEFUN(fmod, (x, y), double x AND double y)
+{
+  return __fmod(x, y);
+}
diff --git a/sysdeps/m68k/fpu/frexp.c b/sysdeps/m68k/fpu/frexp.c
new file mode 100644
index 0000000000..de74851de9
--- /dev/null
+++ b/sysdeps/m68k/fpu/frexp.c
@@ -0,0 +1,27 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#define	__NO_MATH_INLINES
+#include <math.h>
+
+double
+DEFUN(frexp, (value, expptr), double value AND int *expptr)
+{
+  return __frexp(value, expptr);
+}
diff --git a/sysdeps/m68k/fpu/isinf.c b/sysdeps/m68k/fpu/isinf.c
new file mode 100644
index 0000000000..ab2cf0bb03
--- /dev/null
+++ b/sysdeps/m68k/fpu/isinf.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 1991, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#define	__NO_MATH_INLINES
+#include <math.h>
+
+#ifndef	FUNC
+#define	FUNC	__isinf
+#endif
+
+
+int
+DEFUN(FUNC, (x), double x)
+{
+  return __m81_u(FUNC)(x);
+}
+
+weak_alias (__isinf, isinf)
diff --git a/sysdeps/m68k/fpu/isnan.c b/sysdeps/m68k/fpu/isnan.c
new file mode 100644
index 0000000000..d0984911d2
--- /dev/null
+++ b/sysdeps/m68k/fpu/isnan.c
@@ -0,0 +1,4 @@
+#define	FUNC	__isnan
+#include <isinf.c>
+
+weak_alias (__isnan, isnan)
diff --git a/sysdeps/m68k/fpu/ldexp.c b/sysdeps/m68k/fpu/ldexp.c
new file mode 100644
index 0000000000..ba912805d6
--- /dev/null
+++ b/sysdeps/m68k/fpu/ldexp.c
@@ -0,0 +1,27 @@
+/* Copyright (C) 1991, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#define	__NO_MATH_INLINES
+#include <math.h>
+
+__CONSTVALUE double
+DEFUN(ldexp, (x, exp), double x AND int exp)
+{
+  return __ldexp(x, exp);
+}
diff --git a/sysdeps/m68k/fpu/log.c b/sysdeps/m68k/fpu/log.c
new file mode 100644
index 0000000000..4de3346545
--- /dev/null
+++ b/sysdeps/m68k/fpu/log.c
@@ -0,0 +1,3 @@
+#define	FUNC	log
+#define	OP	logn
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/log10.c b/sysdeps/m68k/fpu/log10.c
new file mode 100644
index 0000000000..246b69a364
--- /dev/null
+++ b/sysdeps/m68k/fpu/log10.c
@@ -0,0 +1,2 @@
+#define	FUNC	log10
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/log1p.c b/sysdeps/m68k/fpu/log1p.c
new file mode 100644
index 0000000000..028783819b
--- /dev/null
+++ b/sysdeps/m68k/fpu/log1p.c
@@ -0,0 +1,2 @@
+#define	FUNC	log1p
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/logb.c b/sysdeps/m68k/fpu/logb.c
new file mode 100644
index 0000000000..8619c908c8
--- /dev/null
+++ b/sysdeps/m68k/fpu/logb.c
@@ -0,0 +1,46 @@
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <math.h>
+
+#ifdef	__GNUC__
+
+/* Return the base 2 signed integral exponent of X.  */
+
+double
+DEFUN(__logb, (x), double x)
+{
+  if (__isnan (x))
+    return x;
+  if (__isinf (x))
+    return fabs (x);
+
+  if (x == 0.0)
+    asm ("flog2%.x %0, %0" : "=f" (x) : "0" (x));
+  else
+    asm ("fgetexp%.x %0, %0" : "=f" (x) : "0" (x));
+
+  return x;
+}
+
+weak_alias (__logb, logb)
+
+#else
+#include <sysdeps/ieee754/logb.c>
+#endif
diff --git a/sysdeps/m68k/fpu/pow.c b/sysdeps/m68k/fpu/pow.c
new file mode 100644
index 0000000000..3360020f1d
--- /dev/null
+++ b/sysdeps/m68k/fpu/pow.c
@@ -0,0 +1,27 @@
+/* Copyright (C) 1991, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#define	__NO_MATH_INLINES
+#include <math.h>
+
+__CONSTVALUE double
+DEFUN(pow, (x, y), double x AND double y)
+{
+  return __pow(x, y);
+}
diff --git a/sysdeps/m68k/fpu/rint.c b/sysdeps/m68k/fpu/rint.c
new file mode 100644
index 0000000000..f83a4e4c3f
--- /dev/null
+++ b/sysdeps/m68k/fpu/rint.c
@@ -0,0 +1,5 @@
+#define	FUNC	__rint
+#define	OP	intr
+#include <acos.c>
+
+weak_alias (__rint, rint)
diff --git a/sysdeps/m68k/fpu/sin.c b/sysdeps/m68k/fpu/sin.c
new file mode 100644
index 0000000000..28ac9e50c3
--- /dev/null
+++ b/sysdeps/m68k/fpu/sin.c
@@ -0,0 +1,2 @@
+#define	FUNC	sin
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/sinh.c b/sysdeps/m68k/fpu/sinh.c
new file mode 100644
index 0000000000..fae7c71459
--- /dev/null
+++ b/sysdeps/m68k/fpu/sinh.c
@@ -0,0 +1,2 @@
+#define	FUNC	sinh
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/sqrt.c b/sysdeps/m68k/fpu/sqrt.c
new file mode 100644
index 0000000000..2365b61780
--- /dev/null
+++ b/sysdeps/m68k/fpu/sqrt.c
@@ -0,0 +1,2 @@
+#define	FUNC	sqrt
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/switch/68881-sw.h b/sysdeps/m68k/fpu/switch/68881-sw.h
new file mode 100644
index 0000000000..3d7a3927f5
--- /dev/null
+++ b/sysdeps/m68k/fpu/switch/68881-sw.h
@@ -0,0 +1,64 @@
+/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#ifndef	_68881_SWITCH_H
+
+#define	_68881_SWITCH_H	1
+#include <sys/cdefs.h>
+
+/* This is the format of the data at the code label for a function which
+   wants to switch depending on whether or not a 68881 is present.
+
+   Initially, `insn' is a `jsr' instruction, and `target' is __68881_switch.
+   The first time such a function is called, __68881_switch determines whether
+   or not a 68881 is present, and modifies the function accordingly.
+   Then `insn' is a `jmp' instruction, and `target' is the value of `fpu'
+   if there is 68881, or the value of `soft' if not.  */
+
+struct switch_caller
+  {
+    unsigned short int insn;	/* The `jsr' or `jmp' instruction.  */
+    __ptr_t target;		/* The target of the instruction.  */
+    __ptr_t soft;		/* The address of the soft function.  */
+    __ptr_t fpu;		/* The address of the 68881 function.  */
+  };
+
+/* These are opcodes (values for `insn', above) for `jmp' and `jsr'
+   instructions, respectively, to 32-bit absolute addresses.  */
+#define	JMP	0x4ef9
+#define	JSR	0x4eb9
+
+
+/* Function to determine whether or not a 68881 is available,
+   and modify its caller (which must be a `struct switch_caller', above,
+   in data space) to use the appropriate version.  */
+extern void EXFUN(__68881_switch, (int __dummy));
+
+
+/* Define FUNCTION as a `struct switch_caller' which will call
+   `__FUNCTION_68881' if a 68881 is present, and `__FUNCTION_soft' if not.
+#define	switching_function(FUNCTION) 					      \
+  struct switch_caller FUNCTION =					      \
+    {									      \
+      JSR, (__ptr_t) __68881_switch,					      \
+      __CONCAT(__CONCAT(__,FUNCTION),_soft),				      \
+      __CONCAT(__CONCAT(__,FUNCTION),_68881)				      \
+    }
+
+
+#endif	/* 68881-switch.h  */
diff --git a/sysdeps/m68k/fpu/switch/Dist b/sysdeps/m68k/fpu/switch/Dist
new file mode 100644
index 0000000000..1e00e4cd07
--- /dev/null
+++ b/sysdeps/m68k/fpu/switch/Dist
@@ -0,0 +1 @@
+68881-sw.h switch.c
diff --git a/sysdeps/m68k/fpu/switch/Makefile b/sysdeps/m68k/fpu/switch/Makefile
new file mode 100644
index 0000000000..fd8d7c11f4
--- /dev/null
+++ b/sysdeps/m68k/fpu/switch/Makefile
@@ -0,0 +1,52 @@
+# Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Library General Public License as
+# published by the Free Software Foundation; either version 2 of the
+# License, or (at your option) any later version.
+
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Library General Public License for more details.
+
+# You should have received a copy of the GNU Library General Public
+# License along with the GNU C Library; see the file COPYING.LIB.  If
+# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+# Cambridge, MA 02139, USA.
+
+ifeq ($(subdir),math)
+
+sysdep_routines := $(sysdep_routines) switch
+
+# Find all the sources that have 68881 versions.
++68881-sources := \
+  $(notdir $(wildcard $(addprefix $(filter %/fpu,$(sysdirs)),$(sources))))
+
+# Sysdep directories other than fpu and fpu/switch (this one).
++non68881-dirs := $(filter-out %/fpu %/fpu/switch,$(+sysdep_dirs))
+
+# Get a non-68881 version of the target.
++non68881-version = $(firstword $(wildcard $(addsuffix /$@,$(+non68881-dirs))))
+
+# Directory containing 68881 sources.
++68881-dir := $(filter %/fpu,$(+sysdep_dirs))
+
+# For all the files that have 68881 versions and don't exist already in
+# the source directory (math), automatically make ones that switch between
+# 68881 and soft versions.
+$(addprefix $(objpfx), \
+	    $(filter-out $(wildcard $(+68881-sources)),$(+68881-sources))):
+	(echo '#include <ansidecl.h>'		;\
+	 echo '#include <68881-sw.h>'		;\
+	 echo '#define $* __$*_68881'		;\
+	 echo '#include <$(+68881-dir)/$@>'	;\
+	 echo '#undef $*'			;\
+	 echo '#define $* __$*_soft'		;\
+	 echo '#include <$(non68881-version)>'	;\
+	 echo '#undef $*'			;\
+	 echo 'switching_function($*);') > $@-tmp
+	mv $@-tmp $@
+
+endif
diff --git a/sysdeps/m68k/fpu/switch/__math.h b/sysdeps/m68k/fpu/switch/__math.h
new file mode 100644
index 0000000000..c0f6966981
--- /dev/null
+++ b/sysdeps/m68k/fpu/switch/__math.h
@@ -0,0 +1 @@
+/* We don't want any inlines when we might not have a 68881.  */
diff --git a/sysdeps/m68k/fpu/switch/switch.c b/sysdeps/m68k/fpu/switch/switch.c
new file mode 100644
index 0000000000..057bd1509a
--- /dev/null
+++ b/sysdeps/m68k/fpu/switch/switch.c
@@ -0,0 +1,86 @@
+/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <signal.h>
+#include <68881-sw.h>
+
+
+/* The signal that is sent when a 68881 instruction
+   is executed and there is no 68881.  */
+#ifndef	TRAPSIG
+#define	TRAPSIG	SIGILL
+#endif
+
+/* Zero if no 68881, one if we have a 68881, or -1 if we don't know yet.  */
+static int have_fpu = -1;
+
+
+/* Signal handler for the trap that happens if we don't have a 68881.  */
+static void
+DEFUN(trap, (sig), int sig)
+{
+  have_fpu = 0;
+}
+
+/* This function is called by functions that want to switch.
+   The calling function must be a `struct switch_caller' in data space.
+   It determines whether a 68881 is present, and modifies its caller
+   to be a static jump to either the 68881 version or the soft version.
+   It then returns into the function it has chosen to do the work.  */
+void
+DEFUN(__68881_switch, (dummy), int dummy)
+{
+  PTR *return_address_location = &((PTR *) &dummy)[-1];
+  struct switch_caller *CONST caller
+    = (struct switch_caller *) (((short int *) *return_address_location) - 1);
+
+  if (have_fpu < 0)
+    {
+      /* Figure out whether or not we have a 68881.  */
+      __sighandler_t handler = signal (TRAPSIG, trap);
+      if (handler == SIG_ERR)
+	/* We can't figure it out, so assume we don't have a 68881.
+	   This assumption will never cause us any problems other than
+	   lost performance, while the reverse assumption could cause
+	   the program to crash.  */
+	have_fpu = 0;
+      else
+	{
+	  /* We set `have_fpu' to nonzero, and then execute a 68881
+	     no-op instruction.  If we have a 68881, this will do nothing.
+	     If we don't have one, this will trap and the signal handler
+	     will clear `have_fpu'.  */
+	  have_fpu = 1;
+	  asm ("fnop");
+
+	  /* Restore the old signal handler.  */
+	  (void) signal (TRAPSIG, handler);
+	}
+    }
+
+  /* Modify the caller to be a jump to the appropriate address.  */
+  caller->insn = JMP;
+  caller->target = have_fpu ? caller->fpu : caller->soft;
+
+  /* Make the address we will return to be the target we have chosen.
+     Our return will match the `jsr' done by the caller we have
+     just modified, and it will be just as if that had instead
+     been a `jmp' to the new target.  */
+  *return_address_location = caller->target;
+}
diff --git a/sysdeps/m68k/fpu/tan.c b/sysdeps/m68k/fpu/tan.c
new file mode 100644
index 0000000000..53b3b5342e
--- /dev/null
+++ b/sysdeps/m68k/fpu/tan.c
@@ -0,0 +1,2 @@
+#define	FUNC	tan
+#include <acos.c>
diff --git a/sysdeps/m68k/fpu/tanh.c b/sysdeps/m68k/fpu/tanh.c
new file mode 100644
index 0000000000..cc6739539a
--- /dev/null
+++ b/sysdeps/m68k/fpu/tanh.c
@@ -0,0 +1,2 @@
+#define	FUNC	tanh
+#include <acos.c>