Re: [net-next 09/17] can: length: can_fd_len2dlc(): simplify length calculcation

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On 1/15/21 2:20 PM, Vincent MAILHOL wrote:
> /* map the data length to an appropriate data length code */
> u8 can_fd_len2dlc(u8 len)
> {
>     switch(len) {
>     case 0 ... 8:
>         return len;
>     case 9 ... 12:
>         return 9;
>     case 13 ... 16:
>         return 10;
>     case 17 ... 20:
>         return 11;
>     case 21 ... 24:
>         return 12;
>     case 25 ... 32:
>         return 13;
>     case 33 ... 48:
>         return 14;
>     case 49 ... 64:
>     default:
>         return CANFD_MAX_DLC;
>     }
> }
> 
> And we will just leave the optimizations in the hand of the compiler.

I've already tried this. It results in a longer object file on ARM, even if you
remove the array....

Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |

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