tests/tcg/s390x: Test MDEB and MDEBR
Add a small test to prevent regressions.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230704081506.276055-12-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index dbf64c9..19fbbc6 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -38,6 +38,7 @@
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 0000000..4897d28
--- /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;
+}
