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 in A32 and T32 code. 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
n and 232-
n. Relational operators such as >= use the unsigned
interpretation. This means that 0 > -1 is
In A64 code, numeric expressions evaluate to 64-bit integers. You can
interpret them as unsigned numbers in the range 0 to 264-1, or
signed numbers in the range -263 to 263-1. However, armasm makes no distinction
n and 264-
armasm does not support 64-bit arithmetic variables. See SETA, SETL, and SETS (Restrictions) for a workaround.
Arm recommends that you only use armasm for legacy Arm® syntax assembly
code, and that you use the
armclang assembler and GNU
syntax for all new assembly files.
a SETA 256*256 ; 256*256 is a numeric expression MOV r1,#(a*22) ; (a*22) is a numeric expression