DIV tests - available ST docs simply say '2-17 cycles'
    | Legend | 
    |  | Decode | 
    |  | Execute | 
    |  | Fetch | 
    |  | Flush | 
    |  | Fetch Stall - space in prefetch buffer but bus busy | 
    |  | Decode Stall - bus busy | 
    |  | Decode Stall - insufficient data in prefetch buffer | 
    |  | Decode Stall - read after write | 
The stated cycle count would seem to imply binary long division and
   this is how the STM8 emulator in ucsim currently treats div for.
   cycle counting. However the cycles measured on actual hardware
   suggest this is not correct.
    
        |  |  | 
        | 0x08100 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x08103 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x08105 | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08108 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x0810b | ld     A,#0x40 |  |  |  |  |  | 
        | 0x0810d | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08110 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x08113 | ld     A,#0x20 |  |  |  |  |  | 
        | 0x08115 | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08118 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x0811b | ld     A,#0x10 |  |  |  |  |  | 
        | 0x0811d | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08120 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x08123 | ld     A,#0x08 |  |  |  |  |  | 
        | 0x08125 | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08128 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x0812b | ld     A,#0x04 |  |  |  |  |  | 
        | 0x0812d | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08130 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x08133 | ld     A,#0x02 |  |  |  |  |  | 
        | 0x08135 | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08138 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x0813b | ld     A,#0x01 |  |  |  |  |  | 
        | 0x0813d | div    X,A |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 
|---|
    
        |  |  | 
        | 0x08140 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x08143 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x08145 | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08148 | ldw    X,#0x4000 |  |  |  |  | 
        | 0x0814b | ld     A,#0x80 |  |  |  |  |  | 
        | 0x0814d | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08150 | ldw    X,#0x2000 |  |  |  |  | 
        | 0x08153 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x08155 | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08158 | ldw    X,#0x1000 |  |  |  |  | 
        | 0x0815b | ld     A,#0x80 |  |  |  |  |  | 
        | 0x0815d | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08160 | ldw    X,#0x0800 |  |  |  |  | 
        | 0x08163 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x08165 | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08168 | ldw    X,#0x0400 |  |  |  |  | 
        | 0x0816b | ld     A,#0x80 |  |  |  |  |  | 
        | 0x0816d | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08170 | ldw    X,#0x0200 |  |  |  |  | 
        | 0x08173 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x08175 | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08178 | ldw    X,#0x0100 |  |  |  |  | 
        | 0x0817b | ld     A,#0x80 |  |  |  |  |  | 
        | 0x0817d | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x08180 | ldw    X,#0x0080 |  |  |  |  | 
        | 0x08183 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x08185 | div    X,A |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|
    
        |  |  | 
        | 0x08188 | ldw    X,#0x0040 |  |  |  |  | 
        | 0x0818b | ld     A,#0x80 |  |  |  |  |  | 
        | 0x0818d | div    X,A |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|
    
        |  |  | 
        | 0x08190 | ldw    X,#0x0020 |  |  |  |  | 
        | 0x08193 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x08195 | div    X,A |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|
    
        |  |  | 
        | 0x08198 | ldw    X,#0x0010 |  |  |  |  | 
        | 0x0819b | ld     A,#0x80 |  |  |  |  |  | 
        | 0x0819d | div    X,A |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|
    
        |  |  | 
        | 0x081a0 | ldw    X,#0x0008 |  |  |  |  | 
        | 0x081a3 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x081a5 | div    X,A |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|
    
        |  |  | 
        | 0x081a8 | ldw    X,#0x0004 |  |  |  |  | 
        | 0x081ab | ld     A,#0x80 |  |  |  |  |  | 
        | 0x081ad | div    X,A |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|
    
        |  |  | 
        | 0x081b0 | ldw    X,#0x0002 |  |  |  |  | 
        | 0x081b3 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x081b5 | div    X,A |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|
    
        |  |  | 
        | 0x081b8 | ldw    X,#0x0001 |  |  |  |  | 
        | 0x081bb | ld     A,#0x80 |  |  |  |  |  | 
        | 0x081bd | div    X,A |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|
    
        |  |  | 
        | 0x081c0 | ldw    X,#0x0000 |  |  |  |  | 
        | 0x081c3 | ld     A,#0x80 |  |  |  |  |  | 
        | 0x081c5 | div    X,A |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|
    
        |  |  | 
        | 0x081c8 | ldw    X,#0x003f |  |  |  |  | 
        | 0x081cb | ld     A,#0x08 |  |  |  |  |  | 
        | 0x081cd | div    X,A |  |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 
|---|
    
        |  |  | 
        | 0x081d0 | ldw    X,#0x0040 |  |  |  |  | 
        | 0x081d3 | ld     A,#0x08 |  |  |  |  |  | 
        | 0x081d5 | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x081d8 | ldw    X,#0x0041 |  |  |  |  | 
        | 0x081db | ld     A,#0x08 |  |  |  |  |  | 
        | 0x081dd | div    X,A |  |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 
|---|
    
        |  |  | 
        | 0x081e0 | ldw    X,#0x8000 |  |  |  |  | 
        | 0x081e3 | ldw    Y,#0x0001 |  |  |  |  |  |  | 
        | 0x081e7 | divw   X,Y |  |  |  |  |  |  |  | 
    
    
        | Address | Instruction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 
|---|