The aliasing policies that GCC implements seem to be more strict than
what is in the C99 standard. I am wondering if this is true or whether
I am mistaken (I am not an expert on the standard, so the latter is
definitely possible).
The relevant text is:
An object shall have its stored value acc
Benjamin Redelings I wrote:
Thanks for the information!
Here are several reasons (there are more) why gcc uses 64-bit loads by
default:
1) For a single dot product, the rate of 64-bit data loads roughly
balances the latency of adds to the same register. Parallel dot products
(using 2 accumul
Thanks for the information!
How many people would take advantage of special machinery for some old
CPU, if that's your goal?
Some, but I suppose the old machinery will be gone eventually. But,
yes, I am most interested in current processors.
On CPUs introduced in the last 2 years, movupd
On Wed, 25 Nov 2009, Dave Korn wrote:
> But does it, though? From http://gcc.gnu.org/svnwrite.html:
>[...]
> So, where are whitespace changes to non-comment parts of .c and .h
> source files covered? I think that there may be a bit of a common
> assumption that "obvious" extends somewhat furthe
On Wed, 16 Dec 2009, JohnT wrote:
> Some of the sites listed on the mirror list
> http://gcc.gnu.org/mirrors.html aren't up to date and some aren't
> accessible. LaffeyComputer.com doesn't allow access, and used to
> require a password for access. This isn't the way a GNU mirror site
> ought to o
Andrew Pinski wrote:
> On Fri, Jan 1, 2010 at 7:07 AM, FX wrote:
>> I know something is going on with section names, so I thought I'd mention
>> that there is a big regression on darwin (most "-flto -fwhopr -O2" tests
>> fail) at rev. 155544. An example is:
>
> Really lto should be disabled whe
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