p{read,write}{,64} mips n64 changes

[Alexandre Oliva]

On Mar 20, 2003, Andreas Jaeger <aj@suse.de> wrote:

>      __LONG_LONG_PAIR ((type) ((var) >> 32), \
> 		      (type) ((var) & 0xffffffff))

> Is this not feasible?

The `>> 32' and truncation with `& 0xffffffff' is only used in the
off64_t versions (pread64 and pwrite64), but not in the off_t versions
(pread and pwrite).  In fact, shifting by 32 would invoke undefined
behavior in the off_t versions, so we'd have to make it two shifts
instead.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
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