Add a 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/lcbb.c | 51 +++++++++++++++++++++++++++++++++
2 files changed, 52 insertions(+)
create mode 100644 tests/tcg/s390x/lcbb.c
diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index 73f7cb828e3..c48de439625 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -47,6 +47,7 @@ $(PGM_SPECIFICATION_TESTS): LDFLAGS+=pgm-specification-user.o
TESTS += $(PGM_SPECIFICATION_TESTS)
Z13_TESTS=vistr
+Z13_TESTS+=lcbb
$(Z13_TESTS): CFLAGS+=-march=z13 -O2
TESTS+=$(Z13_TESTS)
diff --git a/tests/tcg/s390x/lcbb.c b/tests/tcg/s390x/lcbb.c
new file mode 100644
index 00000000000..8d368e0998d
--- /dev/null
+++ b/tests/tcg/s390x/lcbb.c
@@ -0,0 +1,51 @@
+/*
+ * Test the LCBB instruction.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <assert.h>
+#include <stdlib.h>
+
+static inline __attribute__((__always_inline__)) void
+lcbb(long *r1, void *dxb2, int m3, int *cc)
+{
+ asm("lcbb %[r1],%[dxb2],%[m3]\n"
+ "ipm %[cc]"
+ : [r1] "+r" (*r1), [cc] "=r" (*cc)
+ : [dxb2] "R" (*(char *)dxb2), [m3] "i" (m3)
+ : "cc");
+ *cc = (*cc >> 28) & 3;
+}
+
+static char buf[0x1000] __attribute__((aligned(0x1000)));
+
+static inline __attribute__((__always_inline__)) void
+test_lcbb(void *p, int m3, int exp_r1, int exp_cc)
+{
+ long r1 = 0xfedcba9876543210;
+ int cc;
+
+ lcbb(&r1, p, m3, &cc);
+ assert(r1 == (0xfedcba9800000000 | exp_r1));
+ assert(cc == exp_cc);
+}
+
+int main(void)
+{
+ test_lcbb(&buf[0], 0, 16, 0);
+ test_lcbb(&buf[63], 0, 1, 3);
+ test_lcbb(&buf[0], 1, 16, 0);
+ test_lcbb(&buf[127], 1, 1, 3);
+ test_lcbb(&buf[0], 2, 16, 0);
+ test_lcbb(&buf[255], 2, 1, 3);
+ test_lcbb(&buf[0], 3, 16, 0);
+ test_lcbb(&buf[511], 3, 1, 3);
+ test_lcbb(&buf[0], 4, 16, 0);
+ test_lcbb(&buf[1023], 4, 1, 3);
+ test_lcbb(&buf[0], 5, 16, 0);
+ test_lcbb(&buf[2047], 5, 1, 3);
+ test_lcbb(&buf[0], 6, 16, 0);
+ test_lcbb(&buf[4095], 6, 1, 3);
+
+ return EXIT_SUCCESS;
+}