1 .intel_syntax noprefix 2 .text 3_in: 4 rex64 in eax,dx 5 rex64 in ax,dx 6_out: 7 rex64 out dx,eax 8 rex64 out dx,ax 9_ins: 10 rex64 insd 11 rex64 insw 12_outs: 13 rex64 outsd 14 rex64 outsw 15 16 .p2align 4,0 17