Subject: Re: hton64
To: John F. Woods <firstname.lastname@example.org>
From: Johan Danielsson <email@example.com>
Date: 06/29/1997 23:46:18
"John F. Woods" <firstname.lastname@example.org> writes:
> Does the compiler vendor not define int16_t, or is the compiler
> obligated to emulate non-addressable quantities?
With addressable you mean "ability to load N bit scalars"?
I think the usual interpretation of intN_t is at least N bits.
Jason Thorpe <email@example.com> writes:
> That's what the compiler on the Cray C90 does (and it only has
> 128-bit addressability :-)
Hmm, I think that all vector crays can address 64 bit quantities. A
short is usually 32 bits, int and long are 64 bits. The size of all
of them is 8.
The question is whether the C-code should be truly generic, or if
(reasonable) assumptions about the hardware can be made.
_swapN(u_intN_t a, int n)
u_intN_t b = 0;
for(i = 0; i < 8 * n; i += 8)
b = (b << 8) | ((a >> i) & 0xff);