On Sun, Feb 13, 2000 at 01:30:37AM +0100, Philipp Rumpf wrote:
> > Alas, you can't. If accessing quantities of type short is exceptionally
> > slow, then it may well be that the ABI decress Thou Shalt Pad. gcc has
>
> any ABI that actually does this ? Actually it wouldn't make sense for
> an ABI to pad
> So, going from there, would it ever make sense for an ABI to pad
> struct { u8 a; u8 b; u16 c; } ?
>
> > __attribute__(packed) to allow you to work around this.
> ^ ^
> YM __attribute__((packed)). And I still claim that isn't actually required
> on any architecture, and just adds unnecessary gcc-specificness.
Some architectures like certain DSPs don't actually implement char or
short as 8 or 16 bit types but make all types 32 bit. While this is
not of interest for the kernel itself it may make using shared memory
for interfacing with such a DSP more entertaining.
Ralf
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This archive was generated by hypermail 2b29 : Wed Feb 23 2000 - 21:00:18 EST