7.14 Numeric expressions
Numeric expressions consist of combinations of numeric constants, numeric variables, ordinary numeric literals, binary operators, and parentheses.
Numeric expressions can contain register-relative or program-relative
expressions if the overall expression evaluates to a value that does not include a register
or the PC.
Numeric expressions evaluate to 32-bit
integers. You can interpret them as unsigned numbers in the range 0 to 232-1, or signed numbers in the range -231 to 231-1. However, armasm makes no
distinction between -
n and 232-
n. Relational operators such as >= use the
unsigned interpretation. This means that 0 > -1 is
a SETA 256*256 ; 256*256 is a numeric expression
MOV r1,#(a*22) ; (a*22) is a numeric expression