On 03.07.23 17:50, Ilya Leoshkevich wrote:
Add a small test to prevent regressions.
Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com>
---
tests/tcg/s390x/Makefile.target | 1 +
tests/tcg/s390x/mdeb.c | 30 ++++++++++++++++++++++++++++++
2 files changed, 31 insertions(+)
create mode 100644 tests/tcg/s390x/mdeb.c
diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index dbf64c991e9..19fbbc6e531 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -38,6 +38,7 @@ TESTS+=ex-branch
TESTS+=mxdb
TESTS+=epsw
TESTS+=larl
+TESTS+=mdeb
cdsg: CFLAGS+=-pthread
cdsg: LDFLAGS+=-pthread
diff --git a/tests/tcg/s390x/mdeb.c b/tests/tcg/s390x/mdeb.c
new file mode 100644
index 00000000000..4897d28069f
--- /dev/null
+++ b/tests/tcg/s390x/mdeb.c
@@ -0,0 +1,30 @@
+/*
+ * Test the MDEB and MDEBR instructions.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <assert.h>
+#include <stdlib.h>
+
+int main(void)
+{
+ union {
+ float f[2];
+ double d;
+ } a;
+ float b;
+
+ a.f[0] = 1.2345;
+ a.f[1] = 999;
+ b = 6.789;
+ asm("mdeb %[a],%[b]" : [a] "+f" (a.d) : [b] "R" (b));
+ assert(a.d > 8.38 && a.d < 8.39);
+
+ a.f[0] = 1.2345;
+ a.f[1] = 999;
+ b = 6.789;
+ asm("mdebr %[a],%[b]" : [a] "+f" (a.d) : [b] "f" (b));
+ assert(a.d > 8.38 && a.d < 8.39);
+
+ return EXIT_SUCCESS;
+}
Acked-by: David Hildenbrand <da...@redhat.com>
--
Cheers,
David / dhildenb
