1 files changed, 37 insertions, 0 deletions
diff --git a/src/crypto/sha512/fallback_test.go b/src/crypto/sha512/fallback_test.go
new file mode 100644
index 0000000..db5b13c
--- /dev/null
+++ b/src/crypto/sha512/fallback_test.go
@@ -0,0 +1,37 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build s390x
+
+package sha512
+
+import (
+	"fmt"
+	"io"
+	"testing"
+)
+
+// Tests the fallback code path in case the optimized asm
+// implementation cannot be used.
+// See also TestBlockGeneric.
+func TestGenericPath(t *testing.T) {
+	if useAsm == false {
+		t.Skipf("assembly implementation unavailable")
+	}
+	useAsm = false
+	defer func() { useAsm = true }()
+	c := New()
+	in := "ΑΒΓΔΕϜΖΗΘΙΚΛΜΝΞΟΠϺϘΡΣΤΥΦΧΨΩ"
+	gold := "6922e319366d677f34c504af31bfcb29" +
+		"e531c125ecd08679362bffbd6b6ebfb9" +
+		"0dcc27dfc1f3d3b16a16c0763cf43b91" +
+		"40bbf9bbb7233724e9a0c6655b185d76"
+	if _, err := io.WriteString(c, in); err != nil {
+		t.Fatalf("could not write to c: %v", err)
+	}
+	out := fmt.Sprintf("%x", c.Sum(nil))
+	if out != gold {
+		t.Fatalf("mismatch: got %s, wanted %s", out, gold)
+	}
+}