[PATCH 4/4] tests/tcg/s390x: Test LOCFHR

[Ilya Leoshkevich <iii@linux.ibm.com>]

Add a small test to prevent regressions.

Cc: qemu-stable@nongnu.org
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 tests/tcg/s390x/Makefile.target |  1 +
 tests/tcg/s390x/locfhr.c        | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 tests/tcg/s390x/locfhr.c

diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index c48de439625..3c239fdd082 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -48,6 +48,7 @@ TESTS += $(PGM_SPECIFICATION_TESTS)
 
 Z13_TESTS=vistr
 Z13_TESTS+=lcbb
+Z13_TESTS+=locfhr
 $(Z13_TESTS): CFLAGS+=-march=z13 -O2
 TESTS+=$(Z13_TESTS)
 
diff --git a/tests/tcg/s390x/locfhr.c b/tests/tcg/s390x/locfhr.c
new file mode 100644
index 00000000000..ab9ff6e4490
--- /dev/null
+++ b/tests/tcg/s390x/locfhr.c
@@ -0,0 +1,29 @@
+/*
+ * Test the LOCFHR instruction.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <assert.h>
+#include <stdlib.h>
+
+static inline __attribute__((__always_inline__)) long
+locfhr(long r1, long r2, int m3, int cc)
+{
+    cc <<= 28;
+    asm("spm %[cc]\n"
+        "locfhr %[r1],%[r2],%[m3]\n"
+        : [r1] "+r" (r1)
+        : [cc] "r" (cc), [r2] "r" (r2), [m3] "i" (m3)
+        : "cc");
+    return r1;
+}
+
+int main(void)
+{
+    assert(locfhr(0x1111111122222222, 0x3333333344444444, 8, 0) ==
+           0x3333333322222222);
+    assert(locfhr(0x5555555566666666, 0x7777777788888888, 11, 1) ==
+           0x5555555566666666);
+
+    return EXIT_SUCCESS;
+}
-- 
2.40.1