This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: "1 + -1" when rounding to -inf
- From: Andreas Schwab <schwab at linux-m68k dot org>
- To: David Miller <davem at davemloft dot net>
- Cc: joseph at codesourcery dot com, libc-alpha at sourceware dot org
- Date: Mon, 21 Apr 2014 21:22:07 +0200
- Subject: Re: "1 + -1" when rounding to -inf
- Authentication-results: sourceware.org; auth=none
- References: <20140421 dot 145126 dot 1827736942397193476 dot davem at davemloft dot net>
David Miller <davem@davemloft.net> writes:
> I wrote a simple test program and, with FE_DOWNWARD, the sequence is:
>
> -1 + 1 == -0.0L
>
> -1L / -0.0L == INF
Both are correct (the latter is independent of the rounding direction).
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."