From: Jim Wilson <wilson@cygnus.com>
To: Weiwen Liu <liu@hepvms.physics.yale.edu>
Cc: egcs@cygnus.com
Subject: Re: complex support on alpha
Date: Thu, 02 Oct 1997 20:35:00 -0000 [thread overview]
Message-ID: <199710030335.UAA16564@cygnus.com> (raw)
In-Reply-To: <Pine.OSF.3.96.971002000152.22469A-100000@hepunix1.physics.yale.edu>
egcs on alpha-dec-osf4.0 fails to generate correct code for
gcc.c-torture/execute/complex-5.c
in the testsuite, because gcc does not calculate correctly the number of
registers needed for 'float __complex__'. Instead of 2 registers, gcc
says only one register is needed.
It has been broken ever since the initial implementation. There is a general
problem that __complex__ X fails if X is half the word size or smaller.
For instance, __complex__ short will fail on any 32 bit machine in the same
way that __complex__ float fails on the alpha. It would be nice to see this
fixed.
Hopefully it can be fixed in a way that doesn't require changes to
every target. If the alpha.h file requires fixes to make __complex__ float
work, then that implies that every tm.h file needs fixes to fix the general
__complex__ problem.
Jim
next prev parent reply other threads:[~1997-10-02 20:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-10-01 21:03 Weiwen Liu
1997-10-01 22:34 ` Richard Henderson
1997-10-02 9:22 ` Weiwen Liu
1997-10-02 10:46 ` Richard Henderson
1997-10-05 16:16 ` Weiwen Liu
1997-10-05 18:28 ` Richard Henderson
1997-10-02 20:35 ` Jim Wilson [this message]
1997-10-04 14:33 ` Kamil Iskra
1997-10-04 18:29 ` Richard Henderson
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