SPRU513Y August 2001 – June 2022 SM320F28335-EP
With the exception of the following expression contexts, there is no restriction on combinations of operations, constants, internally defined symbols, and externally defined symbols.
When an expression contains more than one relocatable symbol or cannot be evaluated during assembly, the assembler encodes a relocation expression in the object file that is later evaluated by the linker. If the final value of the expression is larger in bits than the space reserved for it, you receive an error message from the linker. See Section 3.8 for more information on relocation expressions.
When using the register relative addressing mode, the expression in brackets or parenthesis must be a well-defined expression, as described in Section 5.10.3. For example:
*+XA4[7]