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

[Dale Johannesen]

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.