/* Primitive operations on floating point for GNU Emacs Lisp interpreter.
-Copyright (C) 1988, 1993-1994, 1999, 2001-2011
+Copyright (C) 1988, 1993-1994, 1999, 2001-2012
Free Software Foundation, Inc.
Author: Wolfgang Rupprecht
extern double logb (double);
#endif /* not HPUX and HAVE_LOGB and no logb macro */
-#if defined(DOMAIN) && defined(SING) && defined(OVERFLOW)
+#if defined (DOMAIN) && defined (SING) && defined (OVERFLOW)
/* If those are defined, then this is probably a `matherr' machine. */
# ifndef HAVE_MATHERR
# define HAVE_MATHERR
return make_float (d);
}
-#if defined HAVE_ISNAN && defined HAVE_COPYSIGN
+#undef isnan
+#define isnan(x) ((x) != (x))
+
DEFUN ("isnan", Fisnan, Sisnan, 1, 1, 0,
doc: /* Return non nil iff argument X is a NaN. */)
(Lisp_Object x)
return isnan (XFLOAT_DATA (x)) ? Qt : Qnil;
}
-DEFUN ("copysign", Fcopysign, Scopysign, 1, 2, 0,
+#ifdef HAVE_COPYSIGN
+DEFUN ("copysign", Fcopysign, Scopysign, 2, 2, 0,
doc: /* Copy sign of X2 to value of X1, and return the result.
Cause an error if X1 or X2 is not a float. */)
(Lisp_Object x1, Lisp_Object x2)
if (f1 == 0.0 && f2 == 0.0)
f1 = 1.0;
#ifdef FLOAT_CHECK_DOMAIN
- else if ((f1 == 0.0 && f2 < 0.0) || (f1 < 0 && f2 != floor(f2)))
+ else if ((f1 == 0.0 && f2 < 0.0) || (f1 < 0 && f2 != floor (f2)))
domain_error2 ("expt", arg1, arg2);
#endif
IN_FLOAT2 (f3 = pow (f1, f2), "expt", arg1, arg2);
defsubr (&Scos);
defsubr (&Ssin);
defsubr (&Stan);
-#if defined HAVE_ISNAN && defined HAVE_COPYSIGN
defsubr (&Sisnan);
+#ifdef HAVE_COPYSIGN
defsubr (&Scopysign);
defsubr (&Sfrexp);
defsubr (&Sldexp);