This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: Patch to move "#define USG" from xm-*.h to config.gcc's xm_defines
- To: "Kaveh R. Ghazi" <ghazi at caip dot rutgers dot edu>
- Subject: Re: Patch to move "#define USG" from xm-*.h to config.gcc's xm_defines
- From: Richard Henderson <rth at redhat dot com>
- Date: Sat, 10 Mar 2001 02:08:25 -0800
- Cc: zackw at Stanford dot EDU, gcc-patches at gcc dot gnu dot org
- References: <200103100426.XAA11582@caip.rutgers.edu>
On Fri, Mar 09, 2001 at 11:26:42PM -0500, Kaveh R. Ghazi wrote:
> Is the bit pattern generated by all stage1 compilers the same for a
> given floating point constant?
It ought to be.
> I.e. not whether its *supposed* to be, but is it in practice given
> issues related to subtle float bugs?
*shrug* If there are fp bugs, then no autoconf test
is going to be reliable. Nor, for that matter, will
be the stage1 compiler.
> What about on hosts where char isn't 8 bit (c4x), will the strings
> program show the same result?
No. Err, well, kinda sorta no. Anyway, there won't be any
*host* tests for c4x.
> Is sizeof(float) == 4 everywhere? (Can it be 8?)
Sure it can. But that's a different sort of test, now isn't it.
r~