Re: OT: Processor register size

["Liam R. E. Quin" <liam holoweb net>]

On Mon, 2005-04-11 at 20:20 -0500, Timothy Flechtner wrote:
> wouldn't a pointer be register size?

Depends on the CPU architecture.  E.g. some have
a mixture of register sizes (especially 8-bit CPUs,
but also 16-bit ones).  On the PDP11 series an int
was typically 16 bits and so was a register, but
a pointer would be 32 bits (and so was a long).


> > > typedef unsigned char byte;
> > > byte word[sizeof(float)];

A float almost never fits into a register (except on
the FPU of course), but that expression will get you the numbe
of bytes that a float uses in memory, which seems to be
what you want.  You could also use
#define FLOAT_BYTES sizeof(float)

Liam


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