From: "Ulrich Weigand" <uweigand@de.ibm.com>
To: mutazilah@gmail.com (Paul Edwards)
Cc: gcc@gcc.gnu.org
Subject: Re: i370 port
Date: Fri, 06 Apr 2012 18:13:00 -0000 [thread overview]
Message-ID: <201204061812.q36ICtm9019855@d06av02.portsmouth.uk.ibm.com> (raw)
In-Reply-To: <C02A6CDA58944958AED3CDAEC786D8FF@PaulHP> from "Paul Edwards" at Apr 05, 2012 11:31:39 PM
Paul Edwards wrote:
> I have reviewed the 'W' code in PRINT_OPERAND:
>
> else if (CODE == 'W')
> {
> /* hand-built sign-extension of signed 32-bit to 64-bit */
> mvs_page_lit += 8;
> if (0 <= INTVAL (XV)) {
> fprintf (FILE, "=XL8'00000000");
> } else {
> fprintf (FILE, "=XL8'FFFFFFFF");
> }
> fprintf (FILE, "%08X'", INTVAL (XV));
> }
>
> and it looks to me like it is already correct. If movdi is given a
> const_int as a parameter, then sign-extending to 64-bit is
> exactly what needs to happen, isn't it?
>
> I'm only expecting to compile programs as 32-bit, so I'm not
> expecting more than 32-bit integers. The IFOX assembler
> won't do more than that. In case that's the issue.
Well, even on 32-bit you may get 64-bit integer constants,
e.g. via the "long long" data type:
long long x = 0x123456789abcdefLL;
However, the real question in your case is whether those are
represented as CONST_INT. This is only true if HOST_WIDE_INT
is a 64-bit type; otherwise, such constants would be represented
as a CONST_DOUBLE.
Whether or not HOST_WIDE_INT is a 64-bit type now depends on
which *host* you're building GCC as a cross-compiler on. If
you only ever support 32-bit hosts, then HOST_WIDE_INT will
always be a 32-bit type, and the code above should be fine.
If you want to support 64-bit hosts as well, however, you
will need to handle 64-bit CONST_INT values too.
> But regardless I don't know how to make this code:
>
> mvs_check_page (0, 6, 8);
> return \"MVC^I%O0(8,%R0),%1\";
>
> make use of that 'W' operand.
>
> Do I change that %1 to %W1 perhaps?
Yes, exactly.
Bye,
Ulrich
--
Dr. Ulrich Weigand
GNU Toolchain for Linux on System z and Cell BE
Ulrich.Weigand@de.ibm.com
next prev parent reply other threads:[~2012-04-06 18:13 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-20 12:15 Paul Edwards
2011-08-22 12:23 ` Ulrich Weigand
2012-04-05 13:32 ` Paul Edwards
2012-04-06 18:13 ` Ulrich Weigand [this message]
-- strict thread matches above, loose matches on Subject: below --
2014-02-13 4:23 Paul Edwards
2012-04-07 5:45 Paul Edwards
2012-04-08 17:43 ` Ulrich Weigand
2014-02-11 17:01 ` Paul Edwards
2012-04-06 12:49 Paul Edwards
2012-04-06 18:16 ` Ulrich Weigand
2012-04-07 4:12 ` Paul Edwards
2012-04-06 5:51 Paul Edwards
2011-08-20 10:09 Paul Edwards
2011-08-20 7:44 Paul Edwards
2009-09-22 12:31 Paul Edwards
2009-09-09 22:33 Paul Edwards
2009-09-14 15:42 ` Ulrich Weigand
2009-09-15 12:59 ` Paul Edwards
2009-09-15 13:51 ` Ulrich Weigand
2009-09-17 13:00 ` Paul Edwards
2009-09-17 17:55 ` Ulrich Weigand
2009-09-18 0:35 ` Paul Edwards
2009-09-18 12:06 ` Ulrich Weigand
2009-09-18 12:23 ` Paul Edwards
2009-09-18 13:27 ` Ulrich Weigand
2009-09-18 13:42 ` Paul Edwards
2009-09-18 16:08 ` Ulrich Weigand
2009-09-19 12:57 ` Paul Edwards
2009-09-25 10:19 ` Paul Edwards
2009-09-25 15:20 ` Ulrich Weigand
2009-11-04 5:21 ` Paul Edwards
2009-11-04 16:47 ` Ulrich Weigand
2009-11-09 14:55 ` Paul Edwards
2009-11-09 15:57 ` Ian Lance Taylor
2009-11-09 23:10 ` Paul Edwards
2009-11-10 14:58 ` Paul Edwards
2009-11-10 15:36 ` Ian Lance Taylor
2009-11-10 15:51 ` Paul Edwards
2009-11-10 15:56 ` Ian Lance Taylor
2009-12-02 22:03 ` Paul Edwards
2011-08-13 8:34 ` Paul Edwards
2011-08-15 14:32 ` Ulrich Weigand
2011-08-15 15:26 ` Paul Edwards
2011-08-15 17:23 ` Ulrich Weigand
2011-08-16 11:20 ` Paul Edwards
2011-08-16 13:26 ` Ulrich Weigand
2011-08-18 12:15 ` Paul Edwards
2011-08-18 13:14 ` Ulrich Weigand
2011-08-18 14:18 ` Paul Edwards
2009-08-23 8:50 Paul Edwards
2009-08-26 22:13 ` Henrik Sorensen
2009-06-05 12:45 Paul Edwards
2009-06-05 14:33 ` Joseph S. Myers
2009-06-05 14:57 ` Paul Edwards
2009-06-05 15:03 ` Joseph S. Myers
2009-06-05 15:24 ` Paul Edwards
2009-06-05 15:47 ` Joseph S. Myers
2017-03-31 10:34 ` Paul Edwards
2009-09-12 12:41 ` Paul Edwards
2009-06-05 15:21 ` Ulrich Weigand
2009-06-05 15:39 ` Paul Edwards
2009-06-05 15:49 ` Daniel Jacobowitz
2009-06-05 15:57 ` Paul Edwards
2009-06-05 20:20 ` Joseph S. Myers
2009-06-05 20:45 ` Paul Edwards
2009-06-06 15:00 ` Paul Edwards
2009-06-15 17:46 ` Ulrich Weigand
2009-06-19 0:06 ` Paul Edwards
2009-06-19 12:28 ` Ulrich Weigand
2009-07-18 11:28 ` Paul Edwards
2009-07-20 14:27 ` Ulrich Weigand
2009-08-08 12:04 ` Paul Edwards
2009-08-10 21:25 ` Ulrich Weigand
2009-08-11 0:34 ` Paul Edwards
2009-08-11 15:21 ` Ulrich Weigand
2009-08-12 11:52 ` Paul Edwards
2009-08-12 15:27 ` Paolo Bonzini
2009-08-12 16:35 ` Ulrich Weigand
2009-08-12 17:27 ` Paul Edwards
2009-08-12 17:56 ` Paolo Bonzini
2009-08-12 19:46 ` Ulrich Weigand
2009-08-12 20:31 ` Paul Edwards
2009-08-19 12:07 ` Paul Edwards
2009-08-19 12:27 ` Paolo Bonzini
2009-08-20 12:49 ` Paul Edwards
2009-08-20 22:48 ` Ulrich Weigand
2009-08-21 2:37 ` Paul Edwards
2009-08-21 16:46 ` Ulrich Weigand
2009-06-05 15:44 ` Joseph S. Myers
2009-06-05 15:52 ` Paul Edwards
2009-09-08 15:55 ` Paul Edwards
2009-09-14 15:32 ` Ulrich Weigand
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