and eax, 1048512 lea rcx, [rsi+rax] mov qword ptr [rcx+0], r8 mov qword ptr [rcx+8], r9 mov qword ptr [rcx+16], r10 mov qword ptr [rcx+24], r11 mov qword ptr [rcx+32], r12 mov qword ptr [rcx+40], r13 mov qword ptr [rcx+48], r14 mov qword ptr [rcx+56], r15