(* int to float conversion (truncation) *)
external val fun float(x:int) returns (y:float)

(* float operations *)
external val fun ceil(x:float) returns (y:float)

external val fun floor(x:float) returns (y:float)

external val fun sin(x:float) returns (y:float)
external val fun cos(x:float) returns (y:float)
external val fun tan(x:float) returns (y:float)
external val fun asin(x:float) returns (y:float)
external val fun acos(x:float) returns (y:float)
external val fun atan(x:float) returns (y:float)

external val fun min_float(x:float;y:float) returns (z:float)
external val fun max_float(x:float;y:float) returns (z:float)