68000 instruction cycle times

[Jobbo]

Hello EAB

I've just started getting back into Amiga coding after 25 years. I've been using the VSCode framework by Bartman/Abyss which I heartily recommend! https://marketplace.visualstudio.com...nuZrUPjWtNNucI

I'm slowly working on some demo code using the framework and inline asm. Back in the day I was never "leet" enough to count cycles and just stuck with what seemed fast and leaned on the copper a lot (those Atari guys were right about lazy Amiga coders in my case).

I'd like to be a little more informed this time around and have been using this page for reference: https://oldwww.nvg.ntnu.no/amiga/MC6...000timing.HTML

Anyway I have some questions:

Do I just add the EA cycle times on to the instruction cycle times for the total?

For example is: add.l (#1234,a0),d0 -> 12+6=18 cycles?

Or is there some other rule such as rounding up to 4 cycles?

I should say that I'm only really interested in times for OCS with a standard 68000.

I'm also curious if there are modern tools available to analyze 68000 code and report the cycle counts for me rather than doing it by hand (the lazy thing again).

Is there maybe even an optimizer out there that will help catch obvious optimizations? I know that Devpak had optimizations but I honestly don't remember using those back in the day and it would be great if something new could do the same while cross compiling.

Thanks for any insight!

[a/b]

> Do I just add the EA cycle times on to the instruction cycle times for the total?
In general, yes.
> Or is there some other rule such as rounding up to 4 cycles?
In general, no.
There are exceptions, usually marked with */**/etc, where you have to figure out what's going on and add extra cycles.

+---------------------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|mnemonic |syntax     |dy  |ay  |(ay) |(ay)+|-(ay)|(d,ay)|(d,ay,r)|(m).w|(m).l|(d,pc)|(d,pc,r)|#d  |ccr |sr  |usp |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|abcd.b   |dx,<>      | 6  |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|         |-(ax),<>   |    |    |     |     | 18  |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|add.bw   |dx,<>      | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|         |<>,dx      | 4  | 4  | 8   | 8   | 10  | 12   | 14     | 12  | 16  | 12   | 14     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|add.l    |dx,<>      | 8  |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
|         |<>,dx      | 8  | 8  | 14  | 14  | 16  | 18   | 20     | 18  | 22  | 18   | 20     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|adda.w   |<>,ax      | 8  | 8  | 12  | 12  | 14  | 16   | 18     | 16  | 20  | 16   | 18     | 12 |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|adda.l   |<>,ax      | 8  | 8  | 14  | 14  | 16  | 18   | 20     | 18  | 22  | 18   | 20     | 16 |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|addi.bw  |#d,<>      | 8  |    | 16  | 16  | 18  | 20   | 22     | 20  | 24  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|addi.l   |#d,<>      | 16 |    | 28  | 28  | 30  | 32   | 34     | 32  | 36  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|addq.bw  |#d,<>      | 4  | 8  | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|addq.l   |#d,<>      | 8  | 8  | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|addx.bw  |dx,<>      | 4  |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|         |-(ax),<>   |    |    |     |     | 18  |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|addx.l   |dx,<>      | 8  |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|         |-(ax),<>   |    |    |     |     | 30  |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|and.bw   |dx,<>      | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|         |<>,dx      | 4  |    | 8   | 8   | 10  | 12   | 14     | 12  | 16  | 12   | 14     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|and.l    |dx,<>      | 8  |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
|         |<>,dx      | 8  |    | 14  | 14  | 16  | 18   | 20     | 18  | 22  | 18   | 20     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|andi.bw  |#d,<>      | 8  |    | 16  | 16  | 18  | 20   | 22     | 20  | 24  |      |        |    | 20 | 20 |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|andi.l   |#d,<>      | 16 |    | 28  | 28  | 30  | 32   | 34     | 32  | 36  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|||||||||||||||||||||||dy  |ay  |(ay) |(ay)+|-(ay)|(d,ay)|(d,ay,r)|(m).w|(m).l|(d,pc)|(d,pc,r)|#d  |ccr |sr  |usp |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|asl.bw   |dx,<>      |6+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|asr.bw   |#d,<>      |6+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|asl.l    |dx,<>      |8+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|asr.l    |#d,<>      |8+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|asl.w    |<>         |    |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|asr.w    |           |    |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|bcc.b    |label      | 10/8  (taken/not taken)                                                                   |
+---------+-----------+-------------------------------------------------------------------------------------------+
|bcc.w    |label      | 10/12 (taken/not taken)                                                                   |
+---------+-----------+-------------------------------------------------------------------------------------------+
|bra.bw   |label      | 10                                                                                        |
+---------+-----------+-------------------------------------------------------------------------------------------+
|bsr.bw   |label      | 18                                                                                        |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|bchg     |dx,<>      | 6+x|    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|         |#d,<>      |10+x|    | 16  | 16  | 18  | 20   | 22     | 20  | 24  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|bclr     |dx,<>      | 8+x|    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|         |#d,<>      |12+x|    | 16  | 16  | 18  | 20   | 22     | 20  | 24  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|bset     |dx,<>      | 6+x|    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|         |#d,<>      |10+x|    | 16  | 16  | 18  | 20   | 22     | 20  | 24  |      |        |    |    |    |    |
|         |           | x = 0 if bit is lower than 16, 2 otherwise                                                |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|btst     |dx,<>      | 6  |    | 8   | 8   | 10  | 12   | 14     | 12  | 16  | 12   | 14     |    |    |    |    |
|         |#d,<>      | 10 |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  | 16   | 18     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|chk      |<>,dx      |10+x|    | 14+x| 14+x| 16+x| 18+x | 20+x   | 18+x| 22+x| 18+x | 20+x   |14+x|    |    |    |
|         |           | x = 30 if trap taken                                                                      |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|clr.bw   |<>         | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|clr.l    |<>         | 6  |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|||||||||||||||||||||||dy  |ay  |(ay) |(ay)+|-(ay)|(d,ay)|(d,ay,r)|(m).w|(m).l|(d,pc)|(d,pc,r)|#d  |ccr |sr  |usp |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|cmp.bw   |<>,dx      | 4  | 4  | 8   | 8   | 10  | 12   | 14     | 12  | 16  | 12   | 14     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|cmp.l    |<>,dx      | 6  | 6  | 14  | 14  | 16  | 18   | 20     | 18  | 22  | 18   | 20     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|cmpa.w   |<>,ax      | 6  | 6  | 10  | 10  | 12  | 14   | 16     | 14  | 18  | 14   | 16     | 10 |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|cmpa.l   |<>,ax      | 6  | 6  | 14  | 14  | 16  | 18   | 20     | 18  | 22  | 18   | 20     | 14 |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|cmpi.w   |#d,<>      | 8  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|cmpi.l   |#d,<>      | 14 |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|cmpm.bw  |(ax)+,<>   |    |    |     | 12  |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|cmpm.l   |(ax)+,<>   |    |    |     | 20  |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+-------------------------------------------------------------------------------------------+
|dbcc     |dx,label   | 10/12/14 (taken/cc true/not taken)                                                        |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|divs.w   |<>,dx      | 0+x|    | 4+x | 4+x | 6+x | 8+x  | 10+x   | 8+x | 12+x| 8+x  | 10+x   | 4+x|    |    |    |
|divu.w   |           |    |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|         |           | x = 140-158 (less than 10% difference between the best and worst case)                    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|eor.bw   |dx,<>      | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|eor.l    |dx,<>      | 8  |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|eori.bw  |#d,<>      | 8  |    | 16  | 16  | 18  | 20   | 22     | 20  | 24  |      |        |    | 20 | 20 |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|eori.l   |#d,<>      | 16 |    | 28  | 28  | 30  | 32   | 34     | 32  | 36  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|exg      |<>,<>      | 6  | 6  |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|ext.wl   |<>         | 4  |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|illegal  |           | 34                                                                                        |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|||||||||||||||||||||||dy  |ay  |(ay) |(ay)+|-(ay)|(d,ay)|(d,ay,r)|(m).w|(m).l|(d,pc)|(d,pc,r)|#d  |ccr |sr  |usp |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|jmp      |<>         |    |    | 8   |     |     | 10   | 14     | 10  | 12  | 10   | 14     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|jsr      |<>         |    |    | 16  |     |     | 18   | 22     | 18  | 20  | 18   | 22     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|lea      |<>,ax      |    |    | 4   |     |     | 8    | 12     | 8   | 12  | 8    | 12     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|link     |<>,#d      |    | 16 |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|lsl.bw   |dx,<>      |6+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|lsr.bw   |#d,<>      |6+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|lsl.l    |dx,<>      |8+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|lsr.l    |#d,<>      |8+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|lsl.w    |<>         |    |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|lsr.w    |           |    |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|move.bw  |dx,<>      | 4  |    | 8   | 8   | 8   | 12   | 14     | 12  | 16  |      |        |    | 12 | 12 |    |
|         |ax,<>      | 4  |    | 8   | 8   | 8   | 12   | 14     | 12  | 16  |      |        |    |    |    |    |
|         |(ax),<>    | 8  |    | 12  | 12  | 12  | 16   | 18     | 16  | 20  |      |        |    | 16 | 16 |    |
|         |(ax)+,<>   | 8  |    | 12  | 12  | 12  | 16   | 18     | 16  | 20  |      |        |    | 16 | 16 |    |
|         |-(ax),<>   | 10 |    | 14  | 14  | 14  | 18   | 20     | 18  | 22  |      |        |    | 18 | 18 |    |
|         |(d,ax),<>  | 12 |    | 16  | 16  | 16  | 20   | 22     | 20  | 24  |      |        |    | 20 | 20 |    |
|         |(d,ax,r),<>| 14 |    | 18  | 18  | 18  | 22   | 24     | 22  | 26  |      |        |    | 22 | 22 |    |
|         |(m).w,<>   | 12 |    | 16  | 16  | 16  | 20   | 22     | 20  | 24  |      |        |    | 20 | 20 |    |
|         |(m).l,<>   | 16 |    | 20  | 20  | 20  | 24   | 26     | 24  | 28  |      |        |    | 24 | 24 |    |
|         |(d,pc),<>  | 12 |    | 16  | 16  | 16  | 20   | 22     | 20  | 24  |      |        |    | 20 | 20 |    |
|         |(d,pc,r),<>| 14 |    | 18  | 18  | 18  | 22   | 24     | 22  | 26  |      |        |    | 22 | 22 |    |
|         |#d,<>      | 8  |    | 12  | 12  | 12  | 16   | 18     | 16  | 20  |      |        |    | 16 | 16 |    |
|         |ccr/sr,<>  | 6  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|||||||||||||||||||||||dy  |ay  |(ay) |(ay)+|-(ay)|(d,ay)|(d,ay,r)|(m).w|(m).l|(d,pc)|(d,pc,r)|#d  |ccr |sr  |usp |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|move.l   |dx,<>      | 4  |    | 12  | 12  | 12  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|         |ax,<>      | 4  |    | 12  | 12  | 12  | 16   | 18     | 16  | 20  |      |        |    |    |    | 4  |
|         |(ax),<>    | 12 |    | 20  | 20  | 20  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
|         |(ax)+,<>   | 12 |    | 20  | 20  | 20  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
|         |-(ax),<>   | 14 |    | 22  | 22  | 22  | 26   | 28     | 26  | 30  |      |        |    |    |    |    |
|         |(d,ax),<>  | 16 |    | 24  | 24  | 24  | 28   | 30     | 28  | 32  |      |        |    |    |    |    |
|         |(d,ax,r),<>| 18 |    | 26  | 26  | 26  | 30   | 32     | 30  | 34  |      |        |    |    |    |    |
|         |(m).w,<>   | 16 |    | 24  | 24  | 24  | 28   | 30     | 28  | 32  |      |        |    |    |    |    |
|         |(m).l,<>   | 20 |    | 28  | 28  | 28  | 32   | 34     | 32  | 36  |      |        |    |    |    |    |
|         |(d,pc),<>  | 16 |    | 24  | 24  | 24  | 28   | 30     | 28  | 32  |      |        |    |    |    |    |
|         |(d,pc,r),<>| 18 |    | 26  | 26  | 26  | 30   | 32     | 30  | 34  |      |        |    |    |    |    |
|         |#d,<>      | 12 |    | 20  | 20  | 20  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
|         |usp,<>     |    | 4  |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+

[a/b]

part2:

|movea.w  |<>,ax      | 4  | 4  | 8   | 8   | 10  | 12   | 14     | 12  | 16  | 12   | 14     | 8  |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|movea.l  |<>,ax      | 4  | 4  | 12  | 12  | 14  | 16   | 18     | 16  | 20  | 16   | 18     | 12 |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|movem.w  |list,<>    |    |    | 8+4n|     | 8+4n| 12+4n| 14+4n  |12+4n|16+4n|      |        |    |    |    |    |
|         |<>,list    |    |    |12+4n|12+4n|     | 16+4n| 18+4n  |16+4n|20+4n| 18+4n| 18+4n  |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|movem.l  |list,<>    |    |    | 8+8n|     | 8+8n| 12+8n| 14+8n  |12+8n|16+8n|      |        |    |    |    |    |
|         |<>,list    |    |    |12+8n|12+8n|     | 16+8n| 18+8n  |16+8n|20+8n| 18+8n| 18+8n  |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|movep.w  |dx,<>      |    |    |     |     |     | 16   |        |     |     |      |        |    |    |    |    |
|         |(d,ax),<>  | 16 |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|movep.l  |dx,<>      |    |    |     |     |     | 24   |        |     |     |      |        |    |    |    |    |
|         |(d,ax),<>  | 24 |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|moveq    |#d,<>      | 4  |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|muls.w   |<>,dx      | 0+x|    | 4+x | 4+x | 6+x | 8+x  | 10+x   | 8+x | 12+x| 8+x  | 10+x   | 4+x|    |    |    |
|mulu.w   |           |    |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|         |           | x = 38+2n (s: the number of 10 or 01 pairs in <>0, u: the number of 1s in <>)             |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|||||||||||||||||||||||dy  |ay  |(ay) |(ay)+|-(ay)|(d,ay)|(d,ay,r)|(m).w|(m).l|(d,pc)|(d,pc,r)|#d  |ccr |sr  |usp |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|nbcd.b   |<>         | 6  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|neg.bw   |<>         | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|neg.l    |<>         | 6  |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|negx.bw  |<>         | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|negx.l   |<>         | 6  |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|nop      |           | 4                                                                                         |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|not.bw   |<>         | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|not.l    |<>         | 6  |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|or.bw    |dx,<>      | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|         |<>,dx      | 4  |    | 8   | 8   | 10  | 12   | 14     | 12  | 16  | 12   | 14     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|or.l     |dx,<>      | 8  |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
|         |<>,dx      | 8  |    | 14  | 14  | 16  | 18   | 20     | 18  | 22  | 18   | 20     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|ori.bw   |#d,<>      | 8  |    | 16  | 16  | 18  | 20   | 22     | 20  | 24  |      |        |    | 20 | 20 |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|ori.l    |#d,<>      | 16 |    | 28  | 28  | 30  | 32   | 34     | 32  | 36  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|pea      |<>         |    |    | 12  |     |     | 16   | 20     | 16  | 20  | 16   | 20     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|reset    |           | 132                                                                                       |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|||||||||||||||||||||||dy  |ay  |(ay) |(ay)+|-(ay)|(d,ay)|(d,ay,r)|(m).w|(m).l|(d,pc)|(d,pc,r)|#d  |ccr |sr  |usp |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|rol.bw   |dx,<>      |6+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|ror.bw   |#d,<>      |6+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|rol.l    |dx,<>      |8+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|ror.l    |#d,<>      |8+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|rol.w    |<>         |    |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|ror.w    |           |    |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|roxl.bw  |dx,<>      |6+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|roxr.bw  |#d,<>      |6+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|roxl.l   |dx,<>      |8+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|roxr.l   |#d,<>      |8+2n|    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|roxl.w   |<>         |    |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|roxr.w   |           |    |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|rte      |           | 20                                                                                        |
+---------+-----------+-------------------------------------------------------------------------------------------+
|rtr      |           | 20                                                                                        |
+---------+-----------+-------------------------------------------------------------------------------------------+
|rts      |           | 16                                                                                        |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|sbcd.b   |dx,<>      | 6  |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|         |-(ax),<>   |    |    |     |     | 18  |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|scc      |<>         | 4+x|    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|         |           | x=2 if cc is true                                                                         |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|stop     |#d         | 4                                                                                         |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|||||||||||||||||||||||dy  |ay  |(ay) |(ay)+|-(ay)|(d,ay)|(d,ay,r)|(m).w|(m).l|(d,pc)|(d,pc,r)|#d  |ccr |sr  |usp |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|sub.bw   |dx,<>      | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
|         |<>,dx      | 4  | 4  | 8   | 8   | 10  | 12   | 14     | 12  | 16  | 12   | 14     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|sub.l    |dx,<>      | 8  |    | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
|         |<>,dx      | 8  | 8  | 14  | 14  | 16  | 18   | 20     | 18  | 22  | 18   | 20     |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|suba.w   |<>,ax      | 8  | 8  | 12  | 12  | 14  | 16   | 18     | 16  | 20  | 16   | 18     | 12 |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|suba.l   |<>,ax      | 8  | 8  | 14  | 14  | 16  | 18   | 20     | 18  | 22  | 18   | 20     | 16 |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|subi.bw  |#d,<>      | 8  |    | 16  | 16  | 18  | 20   | 22     | 20  | 24  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|subi.l   |#d,<>      | 16 |    | 28  | 28  | 30  | 32   | 34     | 32  | 36  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|subq.bw  |#d,<>      | 4  | 8  | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|subq.l   |#d,<>      | 8  | 8  | 20  | 20  | 22  | 24   | 26     | 24  | 28  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|subx.bw  |dx,<>      | 4  |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|         |-(ax),<>   |    |    |     |     | 18  |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|subx.l   |dx,<>      | 8  |    |     |     |     |      |        |     |     |      |        |    |    |    |    |
|         |-(ax),<>   |    |    |     |     | 30  |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+-------------------------------------------------------------------------------------------+
|swap     |dx         | 4                                                                                         |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|tas      |<>         | 4  |    | 14  | 14  | 16  | 18   | 20     | 18  | 22  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|trap     |#d         | 38                                                                                        |
+---------+-----------+-------------------------------------------------------------------------------------------+
|trapv    |           | 34/4 (taken, not taken)                                                                   |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|tst.bw   |<>         | 4  |    | 8   | 8   | 10  | 12   | 14     | 12  | 16  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|tst.l    |<>         | 4  |    | 12  | 12  | 14  | 16   | 18     | 16  | 20  |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|unlk     |<>         |    | 12 |     |     |     |      |        |     |     |      |        |    |    |    |    |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+
|||||||||||||||||||||||dy  |ay  |(ay) |(ay)+|-(ay)|(d,ay)|(d,ay,r)|(m).w|(m).l|(d,pc)|(d,pc,r)|#d  |ccr |sr  |usp |
+---------+-----------+----+----+-----+-----+-----+------+--------+-----+-----+------+--------+----+----+----+----+

[Jobbo]

Thats a much easier table to work with, thanks!

[alpine9000]

You could make an argument that the "modern tool" used to count instruction cycles is the C compiler

[Antiriad_UK]

Download easy68k. I only recently found it and it’s great for copying in a subroutine then you can “run” it and step through debug it and get an automatic cycle count.

[Jobbo]

EASy68K is a great tool thanks!