@@ -41,6 +41,7 @@ TESTS+=larl
TESTS+=mdeb
TESTS+=cgebra
TESTS+=clgebr
+TESTS+=clc
cdsg: CFLAGS+=-pthread
cdsg: LDFLAGS+=-pthread
new file mode 100644
@@ -0,0 +1,48 @@
+/*
+ * Test the CLC instruction.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <assert.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static void handle_sigsegv(int sig, siginfo_t *info, void *ucontext)
+{
+ mcontext_t *mcontext = &((ucontext_t *)ucontext)->uc_mcontext;
+ if (mcontext->gregs[0] != 600) {
+ write(STDERR_FILENO, "bad r0\n", 7);
+ _exit(EXIT_FAILURE);
+ }
+ if (((mcontext->psw.mask >> 44) & 3) != 1) {
+ write(STDERR_FILENO, "bad cc\n", 7);
+ _exit(EXIT_FAILURE);
+ }
+ _exit(EXIT_SUCCESS);
+}
+
+int main(void)
+{
+ register unsigned long r0 asm("r0");
+ unsigned long mem = 42, rhs = 500;
+ struct sigaction act;
+ int err;
+
+ memset(&act, 0, sizeof(act));
+ act.sa_sigaction = handle_sigsegv;
+ act.sa_flags = SA_SIGINFO;
+ err = sigaction(SIGSEGV, &act, NULL);
+ assert(err == 0);
+
+ r0 = 100;
+ asm("algr %[r0],%[rhs]\n"
+ "clc 0(8,%[mem]),0(0)\n" /* The 2nd operand will cause a SEGV. */
+ : [r0] "+r" (r0)
+ : [mem] "r" (&mem)
+ , [rhs] "r" (rhs)
+ : "cc", "memory");
+
+ return EXIT_FAILURE;
+}