1 .\" $NetBSD: nextafter.3,v 1.4 2011/09/18 05:33:14 jruoho Exp $
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27 .Dd September 18, 2011
36 .\" XXX: Not yet implemented.
41 .Nd next representable floating-point number
47 .Fn nextafter "double x" "double y"
49 .Fn nextafterf "float x" "float y"
51 .Fn nextafterl "long double x" "long double y"
53 .Fn nexttoward "double x" "long double y"
60 functions return the next machine representable number from
68 the functions return the largest representable floating-point number less than
77 The three functions differ only in the type of the return value and
82 function is equivalent to the
84 family of functions with two exceptions:
85 .Bl -enum -offset indent
87 The second parameter has a type
92 converted to the type of the function, provided that
98 Upon successful completion, the described functions return
99 the next representable floating-point value as described above.
102 is finite but an overflow would occur,
103 a range error follows and the functions return
104 .Dv \*(Pm\*HHUGE_VAL ,
105 .Dv \*(Pm\*HHUGE_VALF ,
107 .Dv \*(Pm\*HHUGE_VALL
108 with the same sign as
114 is \*(Na, a \*(Na is returned.
119 but the function value is subnormal, zero, or underflows,
120 a range error occurs, and either 0.0 or the correct function
121 value (if representable) is returned.
125 The described functions conform to