rust-lang/rust — pull request #15160 by alexcrichton (2014-06-24 23:38:03+00:00)
Title: Remove the quad_precision_float feature gate

The f128 type has very little support in the compiler and the feature is
basically unusable today. Supporting half-baked features in the compiler can be
detrimental to the long-term development of the compiler, and hence this feature
is being removed.