[PATCH 2/2] tests/tcg/s390x: Test LOAD ADDRESS EXTENDED

[Ilya Leoshkevich]

Add a small test to prevent regressions. Userspace runs in primary
mode, so LAE should always set the access register to 0.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 tests/tcg/s390x/Makefile.target |  1 +
 tests/tcg/s390x/lae.c           | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 tests/tcg/s390x/lae.c

diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index 0e670f3f8b9..30994dcf9c2 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -44,6 +44,7 @@ TESTS+=clgebr
 TESTS+=clc
 TESTS+=laalg
 TESTS+=add-logical-with-carry
+TESTS+=lae
 
 cdsg: CFLAGS+=-pthread
 cdsg: LDFLAGS+=-pthread
diff --git a/tests/tcg/s390x/lae.c b/tests/tcg/s390x/lae.c
new file mode 100644
index 00000000000..661e95f9978
--- /dev/null
+++ b/tests/tcg/s390x/lae.c
@@ -0,0 +1,25 @@
+/*
+ * Test the LOAD ADDRESS EXTENDED instruction.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <assert.h>
+#include <stdlib.h>
+
+int main(void)
+{
+    unsigned long long ar = -1, b2 = 100000, r, x2 = 500;
+    int tmp;
+
+    asm("ear %[tmp],%[r]\n"
+        "lae %[r],42(%[x2],%[b2])\n"
+        "ear %[ar],%[r]\n"
+        "sar %[r],%[tmp]"
+        : [tmp] "=&r" (tmp), [r] "=&r" (r), [ar] "+r" (ar)
+        : [b2] "r" (b2), [x2] "r" (x2)
+        : "memory");
+    assert(ar == 0xffffffff00000000ULL);
+    assert(r == 100542);
+
+    return EXIT_SUCCESS;
+}
-- 
2.43.0