From: Jeff R. Allen <jra@nella.org>
Date: Tue, 24 May 2016 17:00:06 +0000 (+0600)
Subject: math/rand: Doc fix for how many bits Seed uses
X-Git-Tag: go1.7beta1~109
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=3474610fbc81f7e9f3f2cb23dc1554b3f5cec657;p=gostls13.git

math/rand: Doc fix for how many bits Seed uses

Document the fact that the default Source uses only
the bottom 31 bits of the given seed.

Fixes #15788

Change-Id: If20d1ec44a55c793a4a0a388f84b9392c2102bd1
Reviewed-on: https://go-review.googlesource.com/23352
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
---

diff --git a/src/math/rand/rand.go b/src/math/rand/rand.go
index d693bfb52f..add039ed4b 100644
--- a/src/math/rand/rand.go
+++ b/src/math/rand/rand.go
@@ -179,7 +179,8 @@ var globalRand = New(&lockedSource{src: NewSource(1)})
 
 // Seed uses the provided seed value to initialize the default Source to a
 // deterministic state. If Seed is not called, the generator behaves as
-// if seeded by Seed(1).
+// if seeded by Seed(1). Only uses the bottom 31 bits of seed; the top 33
+// bits are ignored.
 func Seed(seed int64) { globalRand.Seed(seed) }
 
 // Int63 returns a non-negative pseudo-random 63-bit integer as an int64