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Re: complex arithmetic and signed zero?

From: Richard Henderson <rth at redhat dot com>
To: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 12 Oct 2005 15:08:11 -0700
Subject: Re: complex arithmetic and signed zero?
References: <20051012174944.GA74704@troutmask.apl.washington.edu> <20051012202441.GB14821@redhat.com> <20051012204849.GA76295@troutmask.apl.washington.edu>

On Wed, Oct 12, 2005 at 01:48:49PM -0700, Steve Kargl wrote:
> Unfortunately, the point of my original question 
> was missed.  gcc is not following Annex G in n1124.pdf.
> In particular, see G.5.1  Multiplicative operators.
> 
> y = copysign(0, -1);
> z = I * y; /* This should be computed as (i1)*(-0) = -i0 */
>            /* Upon assignment to z, we have z = 0 - i0   */

File a bug then.


r~

References:
- complex arithmetic and signed zero?
  - From: Steve Kargl
- Re: complex arithmetic and signed zero?
  - From: Richard Henderson
- Re: complex arithmetic and signed zero?
  - From: Steve Kargl

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