9fans - fans of the OS Plan 9 from Bell Labs
 help / color / mirror / Atom feed
From: Lucio De Re <lucio@proxima.alt.za>
To: 9fans@9fans.net
Subject: [9fans] ARM compiler shortcoming?
Date: Sat, 29 Oct 2011 17:29:40 +0200	[thread overview]
Message-ID: <4cdfdc69c18eaaf525552885049926cf@proxima.alt.za> (raw)

My guess is that the ARM compiler does not like 64-bit values in
conditional expressions.  The following C snippet:

	typedef unsigned long long	uvlong;

	uvlong uvinf    = ((uvlong)0x7FF00000<<32)|0x00000000;
	uvlong uvneginf = ((uvlong)0xFFF00000<<32)|0x00000000;

	double u2d(uvlong v);

	double
	__Inf(int sign)
	{
		return u2d(sign < 0 ? uvneginf : uvinf);
	}

compiled with 8c seems OK, but with 5c causes an error:

	% 5c -FTVw /tmp/nan64.c
	/tmp/nan64.c:11 unknown vlong LIST

Using an if statement seems to get rid of the problem.

++L




             reply	other threads:[~2011-10-29 15:29 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-29 15:29 Lucio De Re [this message]
2011-10-29 15:25 ` erik quanstrom
2011-10-29 16:18   ` Lucio De Re
2011-10-29 16:28     ` Charles Forsyth
2011-10-29 16:42       ` Lucio De Re
2011-10-29 15:32 ` Charles Forsyth
2011-10-29 16:09   ` Lucio De Re
2011-10-29 16:09     ` Charles Forsyth
2011-10-29 16:40       ` Lucio De Re
2011-10-29 15:54 ` Charles Forsyth
2011-10-29 16:08   ` Lucio De Re

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4cdfdc69c18eaaf525552885049926cf@proxima.alt.za \
    --to=lucio@proxima.alt.za \
    --cc=9fans@9fans.net \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).