as: Struct

 
 7.92 '.struct EXPRESSION'
 =========================
 
 Switch to the absolute section, and set the section offset to
 EXPRESSION, which must be an absolute expression.  You might use this as
 follows:
              .struct 0
      field1:
              .struct field1 + 4
      field2:
              .struct field2 + 4
      field3:
    This would define the symbol 'field1' to have the value 0, the symbol
 'field2' to have the value 4, and the symbol 'field3' to have the value
 8.  Assembly would be left in the absolute section, and you would need
 to use a '.section' directive of some sort to change to some other
 section before further assembly.