Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 85 insertions, 0 deletions

diff --git a/tests/tcg/cris/libc/check_addcm.c b/tests/tcg/cris/libc/check_addcm.c
new file mode 100644
index 000000000..b355ba164
--- /dev/null
+++ b/tests/tcg/cris/libc/check_addcm.c
@@ -0,0 +1,85 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "sys.h"
+#include "crisutils.h"
+
+/* need to avoid acr as source here.  */
+static always_inline int cris_addc_m(int a, const int *b)
+{
+	asm volatile ("addc [%1], %0\n" : "+r" (a) : "r" (b));
+	return a;
+}
+
+/* 'b' is a crisv32 constrain to avoid postinc with $acr.  */
+static always_inline int cris_addc_pi_m(int a, int **b)
+{
+	asm volatile ("addc [%1+], %0\n" : "+r" (a), "+b" (*b));
+	return a;
+}
+
+#define verify_addc_m(a, b, res, n, z, v, c)  \
+{                                           \
+	int r;                              \
+	r = cris_addc_m((a), (b));            \
+	cris_tst_cc((n), (z), (v), (c));    \
+	if (r != (res))                     \
+		err();                      \
+}
+
+#define verify_addc_pi_m(a, b, res, n, z, v, c)  \
+{                                           \
+	int r;                              \
+	r = cris_addc_pi_m((a), (b));            \
+	cris_tst_cc((n), (z), (v), (c));    \
+	if (r != (res))                     \
+		err();                      \
+}
+
+int x[] = { 0, 0, 2, -1, 0xffff, -1, 0x5432f789};
+
+int main(void)
+{
+	int *p = (void *)&x[0];
+#if 1
+	cris_tst_cc_init();
+	asm volatile ("clearf cz");
+	verify_addc_m(0, p, 0, 0, 0, 0, 0);
+
+	cris_tst_cc_init();
+	asm volatile ("setf z");
+	verify_addc_m(0, p, 0, 0, 1, 0, 0);
+
+	cris_tst_cc_init();
+	asm volatile ("setf c");
+	verify_addc_m(0, p, 1, 0, 0, 0, 0);
+
+	cris_tst_cc_init();
+	asm volatile ("clearf c");
+	verify_addc_pi_m(0, &p, 0, 0, 1, 0, 0);
+
+	p = &x[1];
+	cris_tst_cc_init();
+	asm volatile ("setf c");
+	verify_addc_pi_m(0, &p, 1, 0, 0, 0, 0);
+
+	if (p != &x[2])
+		err();
+
+	cris_tst_cc_init();
+	asm volatile ("clearf c");
+	verify_addc_pi_m(-1, &p, 1, 0, 0, 0, 1);
+
+	if (p != &x[3])
+		err();
+#endif
+	p = &x[3];
+	/* TODO: investigate why this one fails.  */
+	cris_tst_cc_init();
+	asm volatile ("setf c");
+	verify_addc_m(2, p, 2, 0, 0, 0, 1);
+	p += 4;
+
+	pass();
+	return 0;
+}