[PATCH] Implement fma correctly

[Richard Henderson]

On 10/12/2010 12:16 PM, Jakub Jelinek wrote:
> Tested on x86_64-linux, it is very well possible it won't work correctly
> on i686 due to excess precision.

Given that you're already manipulating the status word, you
could go ahead and force 53-bit rounding at the same time
with minimal extra overhead.  Of course, feupdateenv does
not reset the rounding size to match.  You'd have to either
open-code that function in order avoid doing extra work,
or add new helper functions.


r~