Initial revision

diff --git a/sysdeps/m68k/fpu/__math.h b/sysdeps/m68k/fpu/__math.h
new file mode 100644 (file)
index 0000000..0fd80ce
--- /dev/null
+++ b/sysdeps/m68k/fpu/__math.h
@@ -0,0 +1,183 @@
+/* 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.  */
+
+#ifdef __GNUC__
+
+/* IGNORE($ */
+#ifdef __STDC__
+/* $) IFANSI($ */
+#define        __m81_s(x)      #x
+#define        __m81_ul(x)     __ ## x
+/* $) IGNORE($ */
+#else
+/* $) IFTRAD($ */
+#define        __m81_s(x)      "x"
+#define        __m81_ul(x)     __/**/x
+/* $) IGNORE($ */
+#endif
+/* $) */
+
+#ifdef __NO_MATH_INLINES
+#define        __m81_u(x)      __m81_ul(x)
+#else
+#define        __m81_u(x)      x
+#define        __MATH_INLINES  1
+#endif
+
+#define        __inline_mathop2(func, op)                                            \
+  extern __inline __const double                                             \
+  __m81_u(func)(double __mathop_x)                                           \
+  {                                                                          \
+    double __result;                                                         \
+    __asm("f" __m81_s(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)
+
+#ifdef __USE_MISC
+__inline_mathop2(rint, int)
+__inline_mathop2(expm1, etoxm1)
+__inline_mathop2(log1p, lognp1)
+__inline_mathop(atanh)
+#endif
+
+extern __inline __const double
+__m81_u(__drem)(double __x, double __y)
+{
+  double __result;
+  __asm("frem%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
+  return __result;
+}
+
+extern __inline __const double
+__m81_u(__scalb)(double __x, int __n)
+{
+  double __result;
+  if (__x == 0.0)
+    __result = __x;
+  else
+    __asm("fscale%.l %1, %0" : "=f" (__result) : "g" (__n), "0" (__x));
+  return __result;
+}
+
+extern __inline __const 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;
+}
+
+extern __inline __const double
+__m81_u(fmod)(double __x, double __y)
+{
+  double __result;
+  __asm("fmod%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
+  return __result;
+}
+
+extern __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;
+}
+
+extern __inline __const 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;
+}
+
+extern __inline __const 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;
+}
+
+extern __inline double
+__m81_u(modf)(double __value, double *__iptr)
+{
+  double __modf_int = __m81_u(floor)(__value);
+  *__iptr = __modf_int;
+  return __value - __modf_int;
+}
+
+extern __inline 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;
+}
+
+extern __inline 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/logb.c b/sysdeps/m68k/fpu/logb.c
new file mode 100644 (file)
index 0000000..614581e
--- /dev/null
+++ b/sysdeps/m68k/fpu/logb.c
@@ -0,0 +1,37 @@
+/* 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>
+#include <math.h>
+
+/* 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" : "=f" (x) : "0" (x));
+  else
+    asm("fgetexp%.x %0" : "=f" (x) : "0" (x));
+
+  return x;
+}