entered into RCS

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@10 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/ginclude/math-3300.h

+/******************************************************************\
+*								   *
+*  <math-68881.h>		last modified: 18 May 1989.	   *
+*								   *
+*  Copyright (C) 1989 by Matthew Self.				   *
+*  You may freely distribute verbatim copies of this software	   *
+*  provided that this copyright notice is retained in all copies.  *
+*  You may distribute modifications to this software under the     *
+*  conditions above if you also clearly note such modifications    *
+*  with their author and date.			   	     	   *
+*								   *
+*  Note:  errno is not set to EDOM when domain errors occur for    *
+*  most of these functions.  Rather, it is assumed that the	   *
+*  68881's OPERR exception will be enabled and handled		   *
+*  appropriately by the	operating system.  Similarly, overflow	   *
+*  and underflow do not set errno to ERANGE.			   *
+*								   *
+*  Send bugs to Matthew Self (self@bayes.arc.nasa.gov).		   *
+*								   *
+\******************************************************************/
+
+#include <errno.h>
+
+#ifndef HUGE_VAL
+#define HUGE_VAL							\
+({									\
+  double huge_val;							\
+									\
+  __asm ("fmove%.d %#0x7ff0000000000000,%0"	/* Infinity */		\
+	 : "=f" (huge_val)						\
+	 : /* no inputs */);						\
+  huge_val;								\
+})
+#endif
+
+__inline static const double sin (double x)
+{
+  double value;
+
+  __asm ("fsin%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double cos (double x)
+{
+  double value;
+
+  __asm ("fcos%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double tan (double x)
+{
+  double value;
+
+  __asm ("ftan%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double asin (double x)
+{
+  double value;
+
+  __asm ("fasin%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double acos (double x)
+{
+  double value;
+
+  __asm ("facos%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double atan (double x)
+{
+  double value;
+
+  __asm ("fatan%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double atan2 (double y, double x)
+{
+  double pi, pi_over_2;
+
+  __asm ("fmovecr%.x %#0,%0"		/* extended precision pi */
+	 : "=f" (pi)
+	 : /* no inputs */ );
+  __asm ("fscale%.b %#-1,%0"		/* no loss of accuracy */
+	 : "=f" (pi_over_2)
+	 : "0" (pi));
+  if (x > 0)
+    {
+      if (y > 0)
+	{
+	  if (x > y)
+	    return atan (y / x);
+	  else
+	    return pi_over_2 - atan (x / y);
+	}
+      else
+	{
+	  if (x > -y)
+	    return atan (y / x);
+	  else
+	    return - pi_over_2 - atan (x / y);
+	}
+    }
+  else
+    {
+      if (y > 0)
+	{
+	  if (-x > y)
+	    return pi + atan (y / x);
+	  else
+	    return pi_over_2 - atan (x / y);
+	}
+      else
+	{
+	  if (-x > -y)
+	    return - pi + atan (y / x);
+	  else if (y < 0)
+	    return - pi_over_2 - atan (x / y);
+	  else
+	    {
+	      double value;
+
+	      errno = EDOM;
+	      __asm ("fmove%.d %#0x7fffffffffffffff,%0" 	/* quiet NaN */
+		     : "=f" (value)
+		     : /* no inputs */);
+	      return value;
+	    }
+	}
+    }
+}
+
+__inline static const double sinh (double x)
+{
+  double value;
+
+  __asm ("fsinh%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double cosh (double x)
+{
+  double value;
+
+  __asm ("fcosh%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double tanh (double x)
+{
+  double value;
+
+  __asm ("ftanh%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double atanh (double x)
+{
+  double value;
+
+  __asm ("fatanh%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double exp (double x)
+{
+  double value;
+
+  __asm ("fetox%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double expm1 (double x)
+{
+  double value;
+
+  __asm ("fetoxm1%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double log (double x)
+{
+  double value;
+
+  __asm ("flogn%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double log1p (double x)
+{
+  double value;
+
+  __asm ("flognp1%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double log10 (double x)
+{
+  double value;
+
+  __asm ("flog10%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double sqrt (double x)
+{
+  double value;
+
+  __asm ("fsqrt%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double pow (const double x, const double y)
+{
+  if (x > 0)
+    return exp (y * log (x));
+  else if (x == 0)
+    {
+      if (y > 0)
+	return 0.0;
+      else
+	{
+	  double value;
+
+	  errno = EDOM;
+	  __asm ("fmove%.d %#0x7fffffffffffffff,%0"		/* quiet NaN */
+		 : "=f" (value)
+		 : /* no inputs */);
+	  return value;
+	}
+    }
+  else
+    {
+      double temp;
+
+      __asm ("fintrz%.x %1,%0"
+	     : "=f" (temp)			/* integer-valued float */
+	     : "f" (y));
+      if (y == temp)
+        {
+	  int i = (int) y;
+	  
+	  if (i & 1 == 0)			/* even */
+	    return exp (y * log (x));
+	  else
+	    return - exp (y * log (x));
+        }
+      else
+        {
+	  double value;
+
+	  errno = EDOM;
+	  __asm ("fmove%.d %#0x7fffffffffffffff,%0"		/* quiet NaN */
+		 : "=f" (value)
+		 : /* no inputs */);
+	  return value;
+        }
+    }
+}
+
+__inline static const double fabs (double x)
+{
+  double value;
+
+  __asm ("fabs%.x %1,%0"
+	 : "=f" (value)
+	 : "f" (x));
+  return value;
+}
+
+__inline static const double ceil (double x)
+{
+  int rounding_mode, round_up;
+  double value;
+
+  __asm volatile ("fmove%.l %%fpcr,%0"
+		  : "=dm" (rounding_mode)
+		  : /* no inputs */ );
+  round_up = rounding_mode | 0x30;
+  __asm volatile ("fmove%.l %0,%%fpcr"
+		  : /* no outputs */
+		  : "dmi" (round_up));
+  __asm volatile ("fint%.x %1,%0"
+		  : "=f" (value)
+		  : "f" (x));
+  __asm volatile ("fmove%.l %0,%%fpcr"
+		  : /* no outputs */
+		  : "dmi" (rounding_mode));
+  return value;
+}
+
+__inline static const double floor (double x)
+{
+  int rounding_mode, round_down;
+  double value;
+
+  __asm volatile ("fmove%.l %%fpcr,%0"
+		  : "=dm" (rounding_mode)
+		  : /* no inputs */ );
+  round_down = (rounding_mode & ~0x10)
+		| 0x20;
+  __asm volatile ("fmove%.l %0,%%fpcr"
+		  : /* no outputs */
+		  : "dmi" (round_down));
+  __asm volatile ("fint%.x %1,%0"
+		  : "=f" (value)
+		  : "f" (x));
+  __asm volatile ("fmove%.l %0,%%fpcr"
+		  : /* no outputs */
+		  : "dmi" (rounding_mode));
+  return value;
+}
+
+__inline static const double rint (double x)
+{
+  int rounding_mode, round_nearest;
+  double value;
+
+  __asm volatile ("fmove%.l %%fpcr,%0"
+		  : "=dm" (rounding_mode)
+		  : /* no inputs */ );
+  round_nearest = rounding_mode & ~0x30;
+  __asm volatile ("fmove%.l %0,%%fpcr"
+		  : /* no outputs */
+		  : "dmi" (round_nearest));
+  __asm volatile ("fint%.x %1,%0"
+		  : "=f" (value)
+		  : "f" (x));
+  __asm volatile ("fmove%.l %0,%%fpcr"
+		  : /* no outputs */
+		  : "dmi" (rounding_mode));
+  return value;
+}
+
+__inline static const double fmod (double x, double y)
+{
+  double value;
+
+  __asm ("fmod%.x %2,%0"
+	 : "=f" (value)
+	 : "0" (x),
+	   "f" (y));
+  return value;
+}
+
+__inline static const double drem (double x, double y)
+{
+  double value;
+
+  __asm ("frem%.x %2,%0"
+	 : "=f" (value)
+	 : "0" (x),
+	   "f" (y));
+  return value;
+}
+
+__inline static const double scalb (double x, int n)
+{
+  double value;
+
+  __asm ("fscale%.l %2,%0"
+	 : "=f" (value)
+	 : "0" (x),
+	   "dmi" (n));
+  return value;
+}
+
+__inline static double logb (double x)
+{
+  double exponent;
+
+  __asm ("fgetexp%.x %1,%0"
+	 : "=f" (exponent)
+	 : "f" (x));
+  return exponent;
+}
+
+__inline static const double ldexp (double x, int n)
+{
+  double value;
+
+  __asm ("fscale%.l %2,%0"
+	 : "=f" (value)
+	 : "0" (x),
+	   "dmi" (n));
+  return value;
+}
+
+__inline static double frexp (double x, int *exp)
+{
+  double float_exponent;
+  int int_exponent;
+  double mantissa;
+
+  __asm ("fgetexp%.x %1,%0"
+	 : "=f" (float_exponent) 	/* integer-valued float */
+	 : "f" (x));
+  int_exponent = (int) float_exponent;
+  __asm ("fgetman%.x %1,%0"
+	 : "=f" (mantissa)		/* 1.0 <= mantissa < 2.0 */
+	 : "f" (x));
+  if (mantissa != 0)
+    {
+      __asm ("fscale%.b %#-1,%0"
+	     : "=f" (mantissa)		/* mantissa /= 2.0 */
+	     : "0" (mantissa));
+      int_exponent += 1;
+    }
+  *exp = int_exponent;
+  return mantissa;
+}
+
+__inline static double modf (double x, double *ip)
+{
+  double temp;
+
+  __asm ("fintrz%.x %1,%0"
+	 : "=f" (temp)			/* integer-valued float */
+	 : "f" (x));
+  *ip = temp;
+  return x - temp;
+}
+