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((function sign
   (signature int
     (parameters
       (declare (in) int x))
     ((return (expression int / (var_ref x) (expression int abs (var_ref x))))))

   (signature ivec2
     (parameters
       (declare (in) ivec2 x))
     ((declare () ivec2 t)
      (assign (constant bool (1)) (swiz x (var_ref t)) (expression int sign (swiz x (var_ref x))))
      (assign (constant bool (1)) (swiz y (var_ref t)) (expression int sign (swiz y (var_ref x))))
      (return (var_ref t))))

   (signature ivec3
     (parameters
       (declare (in) ivec3 x))
     ((declare () ivec3 t)
      (assign (constant bool (1)) (swiz x (var_ref t)) (expression int sign (swiz x (var_ref x))))
      (assign (constant bool (1)) (swiz y (var_ref t)) (expression int sign (swiz y (var_ref x))))
      (assign (constant bool (1)) (swiz z (var_ref t)) (expression int sign (swiz z (var_ref x))))
      (return (var_ref t))))

   (signature ivec4
     (parameters
       (declare (in) ivec4 x))
     ((declare () ivec4 t)
      (assign (constant bool (1)) (swiz x (var_ref t)) (expression int sign (swiz x (var_ref x))))
      (assign (constant bool (1)) (swiz y (var_ref t)) (expression int sign (swiz y (var_ref x))))
      (assign (constant bool (1)) (swiz z (var_ref t)) (expression int sign (swiz z (var_ref x))))
      (assign (constant bool (1)) (swiz w (var_ref t)) (expression int sign (swiz w (var_ref x))))
      (return (var_ref t))))
))