On 4/13/2012 10:46 AM, David Crayford wrote:
On 14/04/2012 1:38 AM, Edward Jaffe wrote:
On 4/12/2012 9:03 AM, David Crayford wrote:
AFAIK, the PL/X compiler shares a back-end with the other code optimizers,
so should produce excellent code.
Not yet.
So does that mean that the PL/X compiler produces inferior code to the Metal/C
compiler? That would be disappointing considering the majority of the
operating system is writen in PL/X!
Yes. This has been one of the justifications for not having a new z/OS
Architectural Level Set i.e., the existing PL/X compiler cannot generate code
that takes advantage of the newer hardware features, so why force customers to
upgrade unnecessarily? The compiler was given to the folks in Toronto a
couple/few years ago with the intent of having it enhanced with the "smart" back
end used for other IBM compilers. Given that z/OS V2.1 will require z9
processors there is even more pressure on Toronto to deliver this much needed
"plumbing" enhancement.
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
310-338-0400 x318
[email protected]
http://www.phoenixsoftware.com/
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