From: "Pierre Mallard" <pierremallard@yahoo.fr>
To: gcc@gcc.gnu.org
Subject: splitting addhi, addsi
Date: Mon, 21 Oct 2002 08:26:00 -0000 [thread overview]
Message-ID: <20021021075620.33660.qmail@web20309.mail.yahoo.com> (raw)
Hi,
I'm working on the c compiler gcc-3.0.4 to port code
for my cpu.
In order to feel right my delay pipe of 3 slot I need
to cut every expression in code of one length
instruction.
So I need to have my addhi and addsi cut with sthg
like a define_split or things like this and I need to
take care of the carry...
I'm wondering how I can define a define_insn that do
not match the pattern of addqi and that realise the
add_with_carry instruction :
(plus:HI (reg:HI)(reg:HI))
->
(plus:QI (reg:QI)(reg:QI))
(plus_with_carry:QI (reg:QI)(reg:QI))...
Thanks,Regards
Pierre Mallard
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next reply other threads:[~2002-10-21 7:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-21 8:26 Pierre Mallard [this message]
2002-10-21 12:30 ` Richard Henderson
[not found] <200210211213.29760.diwil@eis.ru>
2002-10-21 9:45 ` Pierre Mallard
2002-10-21 10:20 ` Pierre Mallard
-- strict thread matches above, loose matches on Subject: below --
2002-10-21 8:23 Pierre Mallard
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