Chapter 8 Writing Source StatementsAddress Constants 1358.5 Address ConstantsAddress constants return particular bits from expressions that can be evaluated as addresses.They are written as follows.address_specifier (expression)An address constant is written as an expression enclosed in parentheses following an address specifier.An expression consists of names, self-reference address symbols, and constants linked by operators,with the result representing a single value (refer to section 8.7, "Expressions", for details).The address specifiers are shown below.A or a Return the lower 32 bits of the expression value (bits0 to 31)).Example:Assume that the following address is assigned to the label with the name MESSAGE.address= 00000000001110010101011011101001(binary)a(MESSAGE) represents 00000000001110010101011011101001The values expressed by MESSAGE and a(MESSAGE) are the same. In a context calling for theaddress value associated with a symbol, it is more common to use the symbol itself alone instead ofadding the address specifier.
