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On 5 Jan 2000, Johan Kullstam wrote: > "Richard B. Johnson" <root@chaos.analogic.com> writes: [SNIPPED] > > yes, even a lowly Z80 can handle 64 bit quantities. > > however, the real problem is all the fileformats (like tar) and fixed > definition structures which will break. as with y2k, the problem > wasn't in the cpu per se, but in the data storage. > > > Adding stuff to do 'long-long' operations on a 'long' machine will > > just add wasted CPU cycles. I think you should leave it alone. > > i wish C would get a decent set of integer types. it was once enough > but now it's no longer the case. > > it's silly that int is 32 bits on the alpha since int is supposed to > be whatever comes natural to your cpu, but how else would you cover > the range 8, 16, 32, 64 bits? > Well I think `size_t` is supposed to be, as you say, whatever is natural, with `ssize_t` being the signed variant. > if you try to make int be 64 bit, then long and long must > also be 64 or more. you've got char and short left to cover the > important 8, 16 and 32 bit cases and you are left short (no pun > intended). > > i'd also like to see C types with *specified* bit widths, e.g., > int16, int32, uint8 &c. then you could write more portable code when > you really need a certain number of bits like for CRC algorithms. in > case of 36bit computing on a pdp-10 the compiler could at least > complain about lack of 32 bit support (even if it would be easy to > add) instead of silently failing. > Well this is usually done with macros now, see /usr/include/sys/types.h so we do have int8_t, int16_t, and their `u_xxx` variations, etc. Cheers, Dick Johnson Penguin : Linux version 2.3.35 on an i686 machine (400.59 BogoMips). - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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