libgo: Update to weekly.2012-01-20.

From-SVN: r183540

2 files changed, 11 insertions, 3 deletions

diff --git a/libgo/go/math/rand/rand.go b/libgo/go/math/rand/rand.go
index 459aed1..8955219 100644
--- a/libgo/go/math/rand/rand.go
+++ b/libgo/go/math/rand/rand.go
@@ -107,7 +107,9 @@ func (r *Rand) Perm(n int) []int {
 
 var globalRand = New(&lockedSource{src: NewSource(1)})
 
-// Seed uses the provided seed value to initialize the generator to a deterministic state.
+// Seed uses the provided seed value to initialize the generator to a
+// deterministic state. If Seed is not called, the generator behaves as
+// if seeded by Seed(1).
 func Seed(seed int64) { globalRand.Seed(seed) }
 
 // Int63 returns a non-negative pseudo-random 63-bit integer as an int64.
diff --git a/libgo/go/math/rand/rand_test.go b/libgo/go/math/rand/rand_test.go
index 76215a9..0ba8f98 100644
--- a/libgo/go/math/rand/rand_test.go
+++ b/libgo/go/math/rand/rand_test.go
@@ -131,8 +131,14 @@ func TestStandardNormalValues(t *testing.T) {
 }
 
 func TestNonStandardNormalValues(t *testing.T) {
-	for sd := 0.5; sd < 1000; sd *= 2 {
-		for m := 0.5; m < 1000; m *= 2 {
+	sdmax := 1000.0
+	mmax := 1000.0
+	if testing.Short() {
+		sdmax = 5
+		mmax = 5
+	}
+	for sd := 0.5; sd < sdmax; sd *= 2 {
+		for m := 0.5; m < mmax; m *= 2 {
 			for _, seed := range testSeeds {
 				testNormalDistribution(t, numTestSamples, m, sd, seed)
 			}