AT&T Syntax versus Intel Syntax

Re:AT&T Syntax versus Intel Syntax by __init on Sunday November 13, 2022 @03:48PM (#33587181)

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.

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Re:AT&T Syntax versus Intel Syntax by colejohnson66 on Sunday November 13, 2022 @05:03PM (#33587855)

This. 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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