windows 8.1 interrupts

I just try to find some differences from w8 rtm:
w8 rtm _KiTrap02:
 cli
 mov     eax, large fs:40h
 
w8.1 _KiTrap02:
 cli
 clts
 mov     eax, large fs:40h

Also it seems that w8.1 requires processor with SSE - check for example w8.1 _KiTrap03:
  stmxcsr dword ptr [ebp+48h]
  ldmxcsr large dword ptr fs:8
  sub   esp, 80h
  and   esp, 0FFFFFFF0h
  mov   esi, esp
  movaps oword ptr [esi], xmm0
  movaps oword ptr [esi+10h], xmm1
  movaps oword ptr [esi+20h], xmm2
  movaps oword ptr [esi+30h], xmm3
  movaps oword ptr [esi+40h], xmm4
  movaps oword ptr [esi+50h], xmm5
  movaps oword ptr [esi+60h], xmm6
  movaps oword ptr [esi+70h], xmm7