tags:

views:

411

answers:

1
Q: 

Are x86 assembly instructions REPE/REPZ and REPNE/REPNZ equal?

Just a quick question:

Are REPE equal to REPZ and REPNE equal to REPNZ?

Thanks.

+7  A: 

Yes - they are synonyms

The Intel manual volume 2B (Intel® 64 and IA-32 Architectures Software Developer's Manual Volume 2B: Instruction Set Reference, N-Z) says:

The REPZ and REPNZ prefixes are synonymous forms of the REPE and REPNE prefixes, respectively.)

Eli Bendersky  2010-01-19 18:35:20
Thanks for such a concise and extremely objective answer. Just what I needed.
nunos  2010-01-19 18:52:57

related questions

MIPS Assembly Pointer to a Pointer?
Grub and getting into Real Mode (low level assembler question)
What can cause MASM to display "junk"?
Pseudo random generator, Assembler
How can I multiply two 64bit numbers using x86 assembly language?
what interrupt would you hook from DOS to get the real-time clock
Is learning Assembly Language worth the effort?
Prefetch instructions on ARM
What was the name of the Mac (68000) assembler?
What is the fastest way to convert float to int on x86
Comprehensive List of x86_64 Assembly Instructions
Assembly CPU frequency measuring algorithm
Is there a way to insert assembly code into C?
JIT code generation techniques
What is the meaning of "non temporal" memory accesses in x86
How do I get the assembler output from a C file in VS2005
Is GCC broken when taking the address of an argument on ARM7TDMI?
8086 Assembler Tutorial
Is it worth it to learn a dialect of assembly?
Assembler IDE/Simulator for beginner
What is the best way to learn Assembly? Specifically, for someone who has experience in dynamic languages.
Incrementing from 0 to 100 in assembly language.
Mixing 32 bit and 16 bit code with nasm
x86 Assembly on a mac...
Good x86 assembly book