On Jun 26, 2006, at 2:09 PM, Ian Lance Taylor wrote:

As far as I can see, it doesn't.

You missed:
  if (TARGET_MMX)
    ix86_init_mmx_sse_builtins ();

Which HJL should have also quoted.

On the other hand, as far as I can
see, __float80 is undocumented and unused for the i386.  Why does it
exist?

Jan added it with __float128 also:
2003-10-30  Jan Hubicka  <[EMAIL PROTECTED]>

        (ix86_init_mmx_sse_builtins): Add __float80, __float128.

I think it was added for x86_64 ABI support which defines them

http://gcc.gnu.org/ml/gcc-patches/2003-10/msg02473.html

-- Pinski

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