Index: arch/amd64/include/fmath.h
===================================================================
--- arch/amd64/include/fmath.h	(revision c7bb8b05da36424f3a544f20383a616e25ec8633)
+++ arch/amd64/include/fmath.h	(revision 4533601fda687d5bb82b7297dab6960ee8eddd68)
@@ -35,7 +35,4 @@
 typedef union { double bf; unsigned char ldd[8]; }  fmath_ld_union_t;
 
-int fmath_is_negative(double num);
-//int fmath_is_exponent_negative(double num);
-
 /**returns exponent in binary encoding*/
 signed short fmath_get_binary_exponent(double num);
@@ -54,9 +51,4 @@
 double fmath_fint(double num, double *intp);
 
-/** Return absolute value from num */
-double fmath_abs(double num);
-
-double fmath_set_sign(double num,__u8 sign);
-
 /** count base^exponent from positive exponent
 * @param base
@@ -66,2 +58,7 @@
 double fmath_dpow(double base, double exponent) ;
 
+/** return 1, if num is NaN */
+int fmath_is_nan(double num);
+
+/** return 1, if fmath is a infinity */
+int fmath_is_infinity(double num);