tests/tcg/s390x: Add C(G)HRL test

Test COMPARE HALFWORD RELATIVE LONG instructions.
Test that the bytes following the second operand do not affect the
instruction.
Test the sign extension performed on the second operand.

Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230310114157.3024170-3-nsg@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

2 files changed, 81 insertions, 0 deletions

diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index b7f576f..cf93b96 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -28,6 +28,7 @@ TESTS+=div
 TESTS+=clst
 TESTS+=long-double
 TESTS+=cdsg
+TESTS+=chrl
 
 cdsg: CFLAGS+=-pthread
 cdsg: LDFLAGS+=-pthread
diff --git a/tests/tcg/s390x/chrl.c b/tests/tcg/s390x/chrl.c
new file mode 100644
index 0000000..b1c3a1c
--- /dev/null
+++ b/tests/tcg/s390x/chrl.c
@@ -0,0 +1,80 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <stdint.h>
+
+static void test_chrl(void)
+{
+    uint32_t program_mask, cc;
+
+    asm volatile (
+        ".pushsection .rodata\n"
+        "0:\n\t"
+        ".short 1, 0x8000\n\t"
+        ".popsection\n\t"
+
+        "chrl %[r], 0b\n\t"
+        "ipm %[program_mask]\n"
+        : [program_mask] "=r" (program_mask)
+        : [r] "r" (1)
+    );
+
+    cc = program_mask >> 28;
+    assert(!cc);
+
+    asm volatile (
+        ".pushsection .rodata\n"
+        "0:\n\t"
+        ".short -1, 0x8000\n\t"
+        ".popsection\n\t"
+
+        "chrl %[r], 0b\n\t"
+        "ipm %[program_mask]\n"
+        : [program_mask] "=r" (program_mask)
+        : [r] "r" (-1)
+    );
+
+    cc = program_mask >> 28;
+    assert(!cc);
+}
+
+static void test_cghrl(void)
+{
+    uint32_t program_mask, cc;
+
+    asm volatile (
+        ".pushsection .rodata\n"
+        "0:\n\t"
+        ".short 1, 0x8000, 0, 0\n\t"
+        ".popsection\n\t"
+
+        "cghrl %[r], 0b\n\t"
+        "ipm %[program_mask]\n"
+        : [program_mask] "=r" (program_mask)
+        : [r] "r" (1L)
+    );
+
+    cc = program_mask >> 28;
+    assert(!cc);
+
+    asm volatile (
+        ".pushsection .rodata\n"
+        "0:\n\t"
+        ".short -1, 0x8000, 0, 0\n\t"
+        ".popsection\n\t"
+
+        "cghrl %[r], 0b\n\t"
+        "ipm %[program_mask]\n"
+        : [program_mask] "=r" (program_mask)
+        : [r] "r" (-1L)
+    );
+
+    cc = program_mask >> 28;
+    assert(!cc);
+}
+
+int main(void)
+{
+    test_chrl();
+    test_cghrl();
+    return EXIT_SUCCESS;
+}