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, 150 insertions, 0 deletions

diff --git a/accel/tcg/tcg-runtime.c b/accel/tcg/tcg-runtime.c
new file mode 100644
index 000000000..e4e030043
--- /dev/null
+++ b/accel/tcg/tcg-runtime.c
@@ -0,0 +1,150 @@
+/*
+ * Tiny Code Generator for QEMU
+ *
+ * Copyright (c) 2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu/osdep.h"
+#include "qemu/host-utils.h"
+#include "cpu.h"
+#include "exec/helper-proto.h"
+#include "exec/cpu_ldst.h"
+#include "exec/exec-all.h"
+#include "disas/disas.h"
+#include "exec/log.h"
+#include "tcg/tcg.h"
+
+/* 32-bit helpers */
+
+int32_t HELPER(div_i32)(int32_t arg1, int32_t arg2)
+{
+    return arg1 / arg2;
+}
+
+int32_t HELPER(rem_i32)(int32_t arg1, int32_t arg2)
+{
+    return arg1 % arg2;
+}
+
+uint32_t HELPER(divu_i32)(uint32_t arg1, uint32_t arg2)
+{
+    return arg1 / arg2;
+}
+
+uint32_t HELPER(remu_i32)(uint32_t arg1, uint32_t arg2)
+{
+    return arg1 % arg2;
+}
+
+/* 64-bit helpers */
+
+uint64_t HELPER(shl_i64)(uint64_t arg1, uint64_t arg2)
+{
+    return arg1 << arg2;
+}
+
+uint64_t HELPER(shr_i64)(uint64_t arg1, uint64_t arg2)
+{
+    return arg1 >> arg2;
+}
+
+int64_t HELPER(sar_i64)(int64_t arg1, int64_t arg2)
+{
+    return arg1 >> arg2;
+}
+
+int64_t HELPER(div_i64)(int64_t arg1, int64_t arg2)
+{
+    return arg1 / arg2;
+}
+
+int64_t HELPER(rem_i64)(int64_t arg1, int64_t arg2)
+{
+    return arg1 % arg2;
+}
+
+uint64_t HELPER(divu_i64)(uint64_t arg1, uint64_t arg2)
+{
+    return arg1 / arg2;
+}
+
+uint64_t HELPER(remu_i64)(uint64_t arg1, uint64_t arg2)
+{
+    return arg1 % arg2;
+}
+
+uint64_t HELPER(muluh_i64)(uint64_t arg1, uint64_t arg2)
+{
+    uint64_t l, h;
+    mulu64(&l, &h, arg1, arg2);
+    return h;
+}
+
+int64_t HELPER(mulsh_i64)(int64_t arg1, int64_t arg2)
+{
+    uint64_t l, h;
+    muls64(&l, &h, arg1, arg2);
+    return h;
+}
+
+uint32_t HELPER(clz_i32)(uint32_t arg, uint32_t zero_val)
+{
+    return arg ? clz32(arg) : zero_val;
+}
+
+uint32_t HELPER(ctz_i32)(uint32_t arg, uint32_t zero_val)
+{
+    return arg ? ctz32(arg) : zero_val;
+}
+
+uint64_t HELPER(clz_i64)(uint64_t arg, uint64_t zero_val)
+{
+    return arg ? clz64(arg) : zero_val;
+}
+
+uint64_t HELPER(ctz_i64)(uint64_t arg, uint64_t zero_val)
+{
+    return arg ? ctz64(arg) : zero_val;
+}
+
+uint32_t HELPER(clrsb_i32)(uint32_t arg)
+{
+    return clrsb32(arg);
+}
+
+uint64_t HELPER(clrsb_i64)(uint64_t arg)
+{
+    return clrsb64(arg);
+}
+
+uint32_t HELPER(ctpop_i32)(uint32_t arg)
+{
+    return ctpop32(arg);
+}
+
+uint64_t HELPER(ctpop_i64)(uint64_t arg)
+{
+    return ctpop64(arg);
+}
+
+void HELPER(exit_atomic)(CPUArchState *env)
+{
+    cpu_loop_exit_atomic(env_cpu(env), GETPC());
+}