Add simd_support feature

Author: pitdicker

Cargo.toml

@@ -19,10 +19,11 @@ appveyor = { repository = "alexcrichton/rand" }
 
 [features]
 default = ["std" ] # without "std" rand uses libcore
-nightly = ["i128_support"] # enables all features requiring nightly rust
+nightly = ["i128_support", "simd_support"] # enables all features requiring nightly rust
 std = ["rand_core/std", "alloc", "libc", "winapi", "cloudabi", "fuchsia-zircon"]
 alloc = ["rand_core/alloc"]  # enables Vec and Box support (without std)
 i128_support = [] # enables i128 and u128 support
+simd_support = [] # enables SIMD support
 serde1 = ["serde", "serde_derive", "rand_core/serde1"] # enables serialization for PRNGs
 
 [workspace]

src/lib.rs

@@ -233,6 +233,7 @@
 #![cfg_attr(all(feature="alloc", not(feature="std")), feature(alloc))]
 #![cfg_attr(all(feature="i128_support", feature="nightly"), allow(stable_features))] // stable since 2018-03-27
 #![cfg_attr(all(feature="i128_support", feature="nightly"), feature(i128_type, i128))]
+#![cfg_attr(all(feature="simd_support", feature="nightly"), feature(stdsimd))]
 #![cfg_attr(feature = "stdweb", recursion_limit="128")]
 
 #[cfg(feature="std")] extern crate std as core;