fpu_do_push() function problem
Such as title.
function fpu_do_push(emu)

```
static inline void fpu_do_push(x64emu_t* emu)
{
    int newtop = (emu->top-1)&7;
    /*if(emu->p_regs[newtop].tag!=0b11) {// not empty, overflow!
        printf_log(LOG_NONE, "Warning: %p: FPU Stack overflow\n", (void*)emu->old_ip);    // probably better to raise something
        //emu->quit = 1;
        return;
    }*/
    if(emu->fpu_stack<8)
        ++emu->fpu_stack; 
    emu->p_regs[newtop].tag = 0;    // full
    emu->top = newtop;
}
```

However, the Intel manual describes when operating the FPU stack. 
Set FPU flags C1 to 1 if stack overflow occurred; otherwise, set to 0.

So, Did you forget to set flags here?  Should I add this operation？