# Check 32bit CLFLUSHOPT instructions .allow_index_reg .text _start: clflushopt (%ecx) # CLFLUSHOPT clflushopt -123456(%esp,%esi,8) # CLFLUSHOPT .intel_syntax noprefix clflushopt BYTE PTR [ecx] # CLFLUSHOPT clflushopt BYTE PTR [esp+esi*8-123456] # CLFLUSHOPT