which CPUs support MOVBE instruction?

Question

Sometimes GCC generates this instruction when compiling with -march=atom. Does each and every Intel Atom CPU support MOVBE?

What other processors suppo

Answer 1

It appears that all Atom processors support MOVBE; at any rate, the first and least capable (the Atom 230) does. (See e.g. http://www.linuxquestions.org/questions/linux-hardware-18/proc-cpuinfo-output-816192/ for evidence.) I don't believe any non-Atom Intel processors support MOVBE; at any rate, recent Core i7 processors appear not to (see e.g. http://www.techsupportforum.com/forums/f108/i7-running-on-3-of-8-threads-522063.html and search for "movbe" for evidence).

You can detect MOVBE support at runtime using CPUID.