/* Primitive operations on floating point for GNU Emacs Lisp interpreter.
-Copyright (C) 1988, 1993-1994, 1999, 2001-2014 Free Software Foundation,
-Inc.
+Copyright (C) 1988, 1993-1994, 1999, 2001-2014 Free Software Foundation, Inc.
Author: Wolfgang Rupprecht
(according to ack.texi)
}
DEFUN ("isnan", Fisnan, Sisnan, 1, 1, 0,
- doc: /* Return non nil iff argument X is a NaN. */)
+ doc: /* Return non nil if argument X is a NaN. */)
(Lisp_Object x)
{
CHECK_FLOAT (x);
static double
emacs_rint (double d)
{
- return floor (d + 0.5);
+ double d1 = d + 0.5;
+ double r = floor (d1);
+ return r - (r == d1 && fmod (r, 2) != 0);
}
#endif
void
syms_of_floatfns (void)
{
- defsubr (&Sacos);
- defsubr (&Sasin);
- defsubr (&Satan);
- defsubr (&Scos);
- defsubr (&Ssin);
- defsubr (&Stan);
- defsubr (&Sisnan);
-#ifdef HAVE_COPYSIGN
- defsubr (&Scopysign);
-#endif
- defsubr (&Sfrexp);
- defsubr (&Sldexp);
- defsubr (&Sfceiling);
- defsubr (&Sffloor);
- defsubr (&Sfround);
- defsubr (&Sftruncate);
- defsubr (&Sexp);
- defsubr (&Sexpt);
- defsubr (&Slog);
- defsubr (&Ssqrt);
-
- defsubr (&Sabs);
- defsubr (&Sfloat);
- defsubr (&Slogb);
- defsubr (&Sceiling);
- defsubr (&Sfloor);
- defsubr (&Sround);
- defsubr (&Struncate);
+#include "floatfns.x"
}