many changes, to use IEEE format

mach/proto/fp/sbf8.c

@@ -17,16 +17,13 @@ _double
 sbf8(s2,s1)
 _double	s1,s2;
 {
-				/* changing the sign directly	*/
-				/* is faster than the code line	*/
-				/*	s2 = -s2;		*/
-	char unsigned *p;		/* sufficient to access sign bit */
+	unsigned char *p;		/* sufficient to access sign bit */
 	_double *result = &s1;	/* s1 may not be in a register! */
 
 	if (s2.__double[0] == 0 && s2.__double[1] == 0) {
 		return s1;
 	}
-	p = (char unsigned *) &s2;
+	p = (unsigned char *) &s2;
 	*p ^= 0x80;	/* change sign of s2 */
 	*result = adf8(s2,s1);	/* add and return result */
 	return(s1);