clang is almost useless for complex arithmetic

Steve Kargl sgk at
Thu Mar 27 02:08:08 UTC 2014

On Thu, Mar 27, 2014 at 02:01:08AM +0000, Montgomery-Smith, Stephen wrote:
> On 03/25/2014 07:22 PM, Steve Kargl wrote:
> > It appears that clang developers have chosen the naive
> > complex division algorithm, and it does not matter whether
> > one turns CX_LIMITED_RANGE on or off.  This means that 
> > if one uses clang with complex types, one must be careful
> > with the range of values allowed in complex division.  In
> > other words, implementation of complex libm routines cannot
> > use complex data types and must fallback to a decomposition
> > into real and imaginary components. 
> Could someone write a patch for clang to fix this?

Well, I certainly hope someone writes a patch.  I don't
know the internals of llvm/clang/compiler_rt.


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