Am 03.01.2012 00:12, schrieb Paul Gilmartin:
On Jan 2, 2012, at 03:11, Bernd Oppolzer wrote:
On Sun Solaris, there were other kinds of errors, which had to do with the
alignment of shorts,
ints, and longs. While optional on other platforms, this was mandatory on
Solaris.
This could also be a consequence of presuming little-endian.
we have the endian-issues with z Arch, so we were accustomed to this;
no problems so far. But what was really new when we started with Solaris,
were runtime errors, when pointers to long variables didn't contain
addresses which
are multiples of four. This happened with S/360, but never since ...
We are also constantly fighting with rounding problems - successfully most of
the time - ,
because we use the classical HEXADEC representation for floating point on z/OS
(we have to communicate with PL/1 and - classical - ASSEMBLER).
Are you suggesting that ASSEMBLER lacks support for either IEEE BFP or DFP?
Don't know about PL/I.
no, I know that the z Arch supports all that. But we started our math
package in 1993 ca.,
and at that time HFP was a natural choice on C/370 (don't recall if
there was an alternative
at that time). Later, we didn't want to change, simply because we coped
with the rounding
problems. Well, that's not entirely true: for some customers, we deliver
z Arch versions with
IEEE (= BFP).
PL/1 supports today BFP etc, too.
-- gil
