[llvm-commits] [llvm] r57466 - /llvm/trunk/docs/ReleaseNotes.html

[Chris Lattner]

On Oct 13, 2008, at 2:01 PM, Dale Johannesen wrote:

>
> On Oct 13, 2008, at 1:59 PMPDT, Chris Lattner wrote:
>
>> <li>LLVM 2.4 supports the full set of atomic <tt>__sync_*</tt>
>> builtins.  LLVM
>> +2.3 only supported those used by OpenMP, but 2.4 supports them
>> all.  While
>> +llvm-gcc supports all of these builtins, note that not all targets
>> do.  X86 and
>> +PowerPC are known to support them all in both 32-bit and 64-bit
>> mode.</li>
>
> PowerPC 32-bit mode does not support 64-bit atomics.  There is no
> hardware support for this.

Oooh, thanks!

-Chris