Initial overlay of HQEMU 2.5.2 changes onto underlying 2.5.1 QEMU GIT tree2.5.1_overlay

1 files changed, 101 insertions, 0 deletions

diff --git a/llvm/atomic/coremu-template.h b/llvm/atomic/coremu-template.h
new file mode 100644
index 0000000..66b185c
--- /dev/null
+++ b/llvm/atomic/coremu-template.h
@@ -0,0 +1,101 @@
+/* The following code may be included multiple times in a single file. */
+
+#if DATA_BITS == 64
+#  define DATA_TYPE uint64_t
+#  define SUFFIX q
+#elif DATA_BITS == 32
+#  define DATA_TYPE uint32_t
+#  define SUFFIX l
+#elif DATA_BITS == 16
+#  define DATA_TYPE uint16_t
+#  define SUFFIX w
+#elif DATA_BITS == 8
+#  define DATA_TYPE uint8_t
+#  define SUFFIX b
+#else
+#error unsupported data size
+#endif
+
+static __inline__ void coremu_glue(atomic_inc, SUFFIX)(DATA_TYPE *p) {
+    asm volatile(
+        LOCK_PREFIX "inc"coremu_str(SUFFIX)" %0"
+        : "+m"(*p)
+        :
+        : "cc");
+}
+
+static __inline__ void coremu_glue(atomic_dec, SUFFIX)(DATA_TYPE *p) {
+    asm volatile(
+        LOCK_PREFIX "dec"coremu_str(SUFFIX)" %0"
+        : "+m"(*p)
+        :
+        : "cc");
+}
+
+static __inline__ void coremu_glue(atomic_add, SUFFIX)(DATA_TYPE* addr,
+        DATA_TYPE val) {
+    asm volatile(
+        LOCK_PREFIX "add"coremu_str(SUFFIX)" %1, %0"
+        : "+m"(*addr)
+        : "a"(val)
+        : "cc");
+}
+
+/* swap the value VAL and *p.
+ * Return the value swapped out from memory. */
+static inline DATA_TYPE coremu_glue(atomic_exchange, SUFFIX)(
+        DATA_TYPE *p, DATA_TYPE val)
+{
+    DATA_TYPE out;
+    __asm __volatile(
+            "lock; xchg"coremu_str(SUFFIX)" %1,%2 \n\t"
+            : "=a" (out), "+m" (*p)
+            : "a" (val)
+            );
+    return out;
+}
+/* Return previous value in addr. So if the return value is the same as oldval,
+ * swap occured. */
+static __inline__ DATA_TYPE coremu_glue(atomic_compare_exchange, SUFFIX)(DATA_TYPE *addr,
+        DATA_TYPE oldval, DATA_TYPE newval) {
+    asm volatile(
+        LOCK_PREFIX "cmpxchg"coremu_str(SUFFIX)" %2, %1"
+        : "+a"(oldval), "+m"(*addr)
+        : "q"(newval)
+        : "cc");
+
+    return oldval;
+}
+
+static __inline__ void coremu_glue(atomic_and, SUFFIX)(DATA_TYPE *addr,
+        DATA_TYPE mask) {
+    asm volatile(
+        LOCK_PREFIX "and"coremu_str(SUFFIX)" %1, %0"
+        : "+m"(*addr)
+        : "r"(mask)
+        : "cc");
+}
+
+static __inline__ void coremu_glue(atomic_or, SUFFIX)(DATA_TYPE *addr,
+        DATA_TYPE mask) {
+    asm volatile(
+        LOCK_PREFIX "or"coremu_str(SUFFIX)" %1, %0"
+        : "+m"(*addr)
+        : "r"(mask)
+        : "cc");
+}
+
+static __inline__ DATA_TYPE coremu_glue(atomic_xadd, SUFFIX)(
+        DATA_TYPE* addr, DATA_TYPE val) {
+    asm volatile(
+        LOCK_PREFIX "xadd"coremu_str(SUFFIX)" %0, %1"
+        : "+a"(val), "+m"(*addr)
+        :
+        : "cc");
+
+    return val;
+}
+
+#undef DATA_BITS
+#undef DATA_TYPE
+#undef SUFFIX