Most assemblers for Intel syntax will let you write: add eax, [4] if you desire.... | Hacker News

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		__init on Nov 13, 2022 \| parent \| context \| favorite \| on: AT&T Syntax versus Intel Syntax (2001) 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.

colejohnson66 on Nov 13, 2022 [–]

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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