Inconsistent results casting double to int on x86
Thu Mar 23 21:57:00 GMT 2006
On 3/23/06, Perry Smith <firstname.lastname@example.org> wrote:
> On Mar 23, 2006, at 8:19 AM, Andrew Haley wrote:
> > This is because of excess precision in the x87.
> > This is http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323.
> I don't use Intel so forgive my ignorance. Is the call to _FPU_SETCW
> mentioned in comment 60 (http://gcc.gnu.org/bugzilla/show_bug.cgi?
> id=323#c60) going to affect how the x87 operates per process or for
> the whole system? Thats obviously an OS specific question but
> generally is that register saved in the process context? (It seems
> like it would be.)
Thanks for the responses everyone. The call to _FPU_SETCW mentioned
above reducing x87 precision to 64-bit takes care of (or dodges) the
specific issue I described in the original post.
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