libstdc++ release notes for GCC 4.8

[Ulrich Drepper]

On Tue, Oct 30, 2012 at 6:04 PM, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
> Could you each provide a brief sentence or two describing your changes
> to the random distributions so we can add something to
> http://gcc.gnu.org/gcc-4.8/changes.html ?

There are four types of changes:

- new random number engine simd_fast_mersenne_twister_engine with
optimized SSE implementation
- new random number distributions beta_distribution,
normal_mv_distribution, rice_distribution, nakagami_distribution,
pareto_distribution, k_distribution, arcsine_distribution,
hoyt_distribution
- SSE optimized normal_distribution
- use of hardware RNG instruction for random_device on x86 Ivy Bridge and later