---

yaml
---
r: 226225
b: refs/heads/snap-stage3
c: 27c44ce
h: refs/heads/master
i:
  226223: 3e98bd9
v: v3

Author: bluss

[refs]

@@ -1,6 +1,6 @@
 ---
 refs/heads/master: e5d90d98402475b6e154ce216f9efcb80da1a747
-refs/heads/snap-stage3: 5f6a61e16524025a690ac5512669583145db94b1
+refs/heads/snap-stage3: 27c44ce9c3be36d49b829e3dfbdcc983bddd727d
 refs/heads/try: b53c0f93eedcdedd4fd89bccc5a3a09d1c5cd23e
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596

branches/snap-stage3/src/libcore/hash/sip.rs

@@ -32,9 +32,13 @@ pub struct SipHasher {
     k0: u64,
     k1: u64,
     length: usize, // how many bytes we've processed
+    // v0, v2 and v1, v3 show up in pairs in the algorithm,
+    // and simd implementations of SipHash will use vectors
+    // of v02 and v13. By placing them in this order in the struct,
+    // the compiler can pick up on just a few simd optimizations by itself.
     v0: u64,      // hash state
-    v1: u64,
     v2: u64,
+    v1: u64,
     v3: u64,
     tail: u64, // unprocessed bytes le
     ntail: usize,  // how many bytes in tail are valid