On 01/02/2024 00.07, Ilya Leoshkevich wrote:
Check the CVB's and CVBG's corner cases.
Co-developed-by: Pavel Zbitskiy <pavel.zbits...@gmail.com>
Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com>
---
tests/tcg/s390x/Makefile.target | 1 +
tests/tcg/s390x/cvb.c | 47 +++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+)
create mode 100644 tests/tcg/s390x/cvb.c
diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index 04e4bddd83d..e2aba2ec274 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -46,6 +46,7 @@ TESTS+=laalg
TESTS+=add-logical-with-carry
TESTS+=lae
TESTS+=cvd
+TESTS+=cvb
cdsg: CFLAGS+=-pthread
cdsg: LDFLAGS+=-pthread
diff --git a/tests/tcg/s390x/cvb.c b/tests/tcg/s390x/cvb.c
new file mode 100644
index 00000000000..47b7a7965f4
--- /dev/null
+++ b/tests/tcg/s390x/cvb.c
@@ -0,0 +1,47 @@
+/*
+ * Test the CONVERT TO DECIMAL instruction.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <assert.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+static int32_t cvb(uint64_t x)
+{
+ uint32_t ret;
+
+ asm("cvb %[ret],%[x]" : [ret] "=r" (ret) : [x] "R" (x));
+
+ return ret;
+}
+
+static int64_t cvbg(__uint128_t x)
+{
+ int64_t ret;
+
+ asm("cvbg %[ret],%[x]" : [ret] "=r" (ret) : [x] "T" (x));
+
+ return ret;
+}
+
+int main(void)
+{
+ __uint128_t m = (((__uint128_t)0x9223372036854775) << 16) | 0x8070;
+
+ assert(cvb(0xc) == 0);
+ assert(cvb(0x1c) == 1);
+ assert(cvb(0x25594c) == 25594);
+ assert(cvb(0x1d) == -1);
+ assert(cvb(0x2147483647c) == 0x7fffffff);
+ assert(cvb(0x2147483647d) == -0x7fffffff);
+
+ assert(cvbg(0xc) == 0);
+ assert(cvbg(0x1c) == 1);
+ assert(cvbg(0x25594c) == 25594);
+ assert(cvbg(0x1d) == -1);
+ assert(cvbg(m | 0xc) == 0x7fffffffffffffff);
+ assert(cvbg(m | 0xd) == -0x7fffffffffffffff);
+
+ return EXIT_SUCCESS;
+}
Reviewed-by: Thomas Huth <th...@redhat.com>
