[PATCH v2 2/2] tests/tcg/s390x: Add C(G)HRL test

[Nina Schoetterl-Glausch]

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>
---


I don't know what the coding style is for inline asm.
checkpatch.sh complains about the tabs inside the asm, which I find a
bit surprising given they're inside a string.
IMO emitting tabs makes sense in order to be consistent with gcc output.
I left the tabs in for now, but can remove them.


 tests/tcg/s390x/chrl.c          | 76 +++++++++++++++++++++++++++++++++
 tests/tcg/s390x/Makefile.target |  1 +
 2 files changed, 77 insertions(+)
 create mode 100644 tests/tcg/s390x/chrl.c

diff --git a/tests/tcg/s390x/chrl.c b/tests/tcg/s390x/chrl.c
new file mode 100644
index 0000000000..fa33d43c59
--- /dev/null
+++ b/tests/tcg/s390x/chrl.c
@@ -0,0 +1,76 @@
+#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:    .short  1,0x8000\n"
+        "      .popsection\n"
+
+        "      chrl    %[r],0b\n"
+        "      ipm     %[program_mask]\n"
+        : [program_mask] "=r" (program_mask)
+        : [r] "r" (1)
+    );
+
+    cc = program_mask >> 28;
+    assert(!cc);
+
+    asm volatile (
+               ".pushsection .rodata\n"
+        "0:    .short  -1,0x8000\n"
+        "      .popsection\n"
+
+        "      chrl    %[r],0b\n"
+        "      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:    .short  1,0x8000,0,0\n"
+        "      .popsection\n"
+
+        "      cghrl   %[r],0b\n"
+        "      ipm     %[program_mask]\n"
+        : [program_mask] "=r" (program_mask)
+        : [r] "r" (1L)
+    );
+
+    cc = program_mask >> 28;
+    assert(!cc);
+
+    asm volatile (
+               ".pushsection .rodata\n"
+        "0:    .short  -1,0x8000,0,0\n"
+        "      .popsection\n"
+
+        "      cghrl   %[r],0b\n"
+        "      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;
+}
diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index 72ad309b27..a3d3beeffe 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
-- 
2.37.2