RShiftU64.c

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UINT64
EFIAPI
InternalMathRShiftU64 (
  IN      UINT64  Operand,
  IN      UINTN   Count
  )
{
  _asm {
    mov     cl, byte ptr [Count]
    xor     edx, edx
    mov     eax, dword ptr [Operand + 4]
    test    cl, 32
    jnz     L0
    mov     edx, eax
    mov     eax, dword ptr [Operand + 0]
L0:
    shrd    eax, edx, cl
    shr     edx, cl
  }
}