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by __init 1311 days ago
Most assemblers for Intel syntax will let you write:

    add eax, [4]
if you desire. Indeed, many disassemblers will follow suit in unambiguous cases. IDA, for example, does this.
1 comments
colejohnson66 1311 days ago
The only time “DWORD PTR” is required is when (1) you're working with old assemblers, or (2) you're using a memory operand with an immediate:

    add eax, [4]       ; inferred
    add [eax], 4       ; ambiguous
    add DWORD [eax], 4 ; explicit
A disassembler may output it when not necessary, however.
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