libgo: update to Go 1.8 release candidate 1

    
    Compiler changes:
      * Change map assignment to use mapassign and assign value directly.
      * Change string iteration to use decoderune, faster for ASCII strings.
      * Change makeslice to take int, and use makeslice64 for larger values.
      * Add new noverflow field to hmap struct used for maps.
    
    Unresolved problems, to be fixed later:
      * Commented out test in go/types/sizes_test.go that doesn't compile.
      * Commented out reflect.TestStructOf test for padding after zero-sized field.
    
    Reviewed-on: https://go-review.googlesource.com/35231

gotools/:
	Updates for Go 1.8rc1.
	* Makefile.am (go_cmd_go_files): Add bug.go.
	(s-zdefaultcc): Write defaultPkgConfig.
	* Makefile.in: Rebuild.

From-SVN: r244456

2 files changed, 13 insertions, 1 deletions

diff --git a/libgo/go/crypto/ecdsa/ecdsa.go b/libgo/go/crypto/ecdsa/ecdsa.go
index 72fb499..02848fd 100644
--- a/libgo/go/crypto/ecdsa/ecdsa.go
+++ b/libgo/go/crypto/ecdsa/ecdsa.go
@@ -149,7 +149,7 @@ var errZeroParam = errors.New("zero parameter")
 // returns the signature as a pair of integers. The security of the private key
 // depends on the entropy of rand.
 func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err error) {
-	// Get max(log2(q) / 2, 256) bits of entropy from rand.
+	// Get min(log2(q) / 2, 256) bits of entropy from rand.
 	entropylen := (priv.Curve.Params().BitSize + 7) / 16
 	if entropylen > 32 {
 		entropylen = 32
diff --git a/libgo/go/crypto/ecdsa/ecdsa_test.go b/libgo/go/crypto/ecdsa/ecdsa_test.go
index fc25fd7..9546f67 100644
--- a/libgo/go/crypto/ecdsa/ecdsa_test.go
+++ b/libgo/go/crypto/ecdsa/ecdsa_test.go
@@ -54,6 +54,18 @@ func BenchmarkSignP256(b *testing.B) {
 	}
 }
 
+func BenchmarkSignP384(b *testing.B) {
+	b.ResetTimer()
+	p384 := elliptic.P384()
+	hashed := []byte("testing")
+	priv, _ := GenerateKey(p384, rand.Reader)
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_, _, _ = Sign(rand.Reader, priv, hashed)
+	}
+}
+
 func BenchmarkVerifyP256(b *testing.B) {
 	b.ResetTimer()
 	p256 := elliptic.P256()