Jasper Yu says to YSITD
mov [rax], bl mov [rax], bx mov [rax], ebx mov [rax], rbx mov [eax], bl mov [eax], bx mov [eax], ebx mov [eax], rbx mov [r8], bl mov [r8], bx mov [r8], ebx mov [r8], rbx mov [r8d], bl mov [r8d], bx mov [r8d], ebx mov [r8d], rbx mov [rax], r11b mov [rax], r11w mov [rax], r11d mov [rax], r11 mov [eax], r11b mov [eax], r11w mov [eax], r11d mov [eax], r11 mov [r8], r11b mov [r8], r11w mov [r8], r11d mov [r8], r11 mov [r8d], r11b mov [r8d], r11w mov [r8d], r11d mov [r8d], r11 mov [rax], r11b mov [rax], r11w mov [rax], r11d mov [rax], r11 mov [eax], r11b mov [eax], r11w mov [eax], r11d mov [eax], r11 mov [r8], r11b mov [r8], r11w mov [r8], r11d mov [r8], r11 mov [r8d], r11b mov [r8d], r11w mov [r8d], r11d mov [r8d], r11