Similarities and differences between Arm Assembly command EQU and equal sign "="

Differences:

1. the symbolic names defined using the equ directive cannot be the same as other symbolic names. The symbolic names must be unique and cannot be redefined;

The symbolic names defined by the equal sign pseudo command "=" can be duplicated, can be redefined, and can be assigned a value again.

2. the symbolic names defined using the equ pseudo command can not only represent a constant or constant expression, but also represent strings, keywords, script codes, a string of symbols (such as Word PTR), and so on;

The symbolic name defined by the equal sign pseudo command "=" is only used to represent a numerical expression.

Similarities:

The storage space is not allocated to the system for the symbolic names defined by the equivalent pseudocommand EQU and those defined by the equal sign pseudocommand.

From http://hi.baidu.com/wuqi19881003/item/a71e8882edd305d15e0ec17e