assemblyx86intel-syntax

Whats is equivalent of REP stosl in intel x86

I am trying to run an instruction which I took from GAS style but when I ported this instruction to intel style, I get error like:

"error: parser: instruction expected"

I tried with various combination like REP movsl, REP loadsl but all giving the same problem, Can anybody tell this right command equivalent to REP stosl in x86

Solution

  • The rep ist just a prefix to indicate that the following instruction has to be repeated (E)CX times. This is only valid for a limited set of instructions though. The actual instruction is the stos in your case and it needs a type operand. b for bytes, w for word and d for dword operand size.

    In your case d should be the correct operand size.