1 files changed, 93 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/csky/bits/atomic.h b/libc/sysdeps/linux/csky/bits/atomic.h
new file mode 100644
index 000000000..231d58f30
--- /dev/null
+++ b/libc/sysdeps/linux/csky/bits/atomic.h
@@ -0,0 +1,93 @@
+#ifndef __CSKY_ATOMIC_H_
+#define __CSKY_ATOMIC_H_
+
+#include <stdint.h>
+#include <sysdep.h>
+
+typedef int8_t atomic8_t;
+typedef uint8_t uatomic8_t;
+typedef int_fast8_t atomic_fast8_t;
+typedef uint_fast8_t uatomic_fast8_t;
+
+typedef int16_t atomic16_t;
+typedef uint16_t uatomic16_t;
+typedef int_fast16_t atomic_fast16_t;
+typedef uint_fast16_t uatomic_fast16_t;
+
+typedef int32_t atomic32_t;
+typedef uint32_t uatomic32_t;
+typedef int_fast32_t atomic_fast32_t;
+typedef uint_fast32_t uatomic_fast32_t;
+
+typedef int64_t atomic64_t;
+typedef uint64_t uatomic64_t;
+typedef int_fast64_t atomic_fast64_t;
+typedef uint_fast64_t uatomic_fast64_t;
+
+typedef intptr_t atomicptr_t;
+typedef uintptr_t uatomicptr_t;
+typedef intmax_t atomic_max_t;
+typedef uintmax_t uatomic_max_t;
+
+# define __arch_compare_and_exchange_bool_8_int(mem, newval, oldval) \
+  (abort (), 0)
+
+# define __arch_compare_and_exchange_bool_16_int(mem, newval, oldval) \
+  (abort (), 0)
+
+# define __arch_compare_and_exchange_bool_32_int(mem, newval, oldval) \
+  ({ __typeof(mem) _mem = (mem);                       \
+    __typeof(oldval) _oldval = oldval;                 \
+    __typeof(newval) _newval = newval;                 \
+    register __typeof(oldval) _a0 __asm__ ("a0") = _oldval;        \
+    register __typeof(newval) _a1 __asm__ ("a1") = _newval;        \
+    register __typeof(mem) _a2 __asm__ ("a2") = _mem;          \
+    __asm__ __volatile__ ("trap   2;"                     \
+     : "+r" (_a0) : "r" (_a1) , "r" (_a2)                 \
+     : "a3", "memory");                \
+    _a0; })
+
+#  define __arch_compare_and_exchange_bool_64_int(mem, newval, oldval) \
+  (abort (), 0)
+
+#define __arch_compare_and_exchange_val_8_int(mem, newval, oldval) \
+	(abort (), 0)
+
+#define __arch_compare_and_exchange_val_16_int(mem, newval, oldval) \
+	(abort (), 0)
+
+#define __arch_compare_and_exchange_val_32_int(mem, newval, oldval) \
+  ({ __typeof (mem) _mem = (mem);                       \
+	__typeof (*mem) __gret = *_mem;                     \
+    unsigned int _tmp = 0;                                  \
+    __typeof (oldval) _oldval = oldval;                 \
+    __typeof (newval) _newval = newval;                 \
+    register __typeof (oldval) _a0 __asm__ ("a0") = _oldval;    \
+    register __typeof (newval) _a1 __asm__ ("a1") = _newval;    \
+    register __typeof (mem) _a2 __asm__ ("a2") = _mem;          \
+        __asm__ __volatile__ ("1:\n\t"        \
+      "ldw      %1, (%4, 0x0)\n\t"            \
+      "cmpne    %1, %0\n\t"                   \
+      "bt       2f\n\t"                       \
+      "mov      %2, %0\n\t"                   \
+      "trap     2\n\t"                        \
+      "cmpnei   %0, 0\n\t"                    \
+      "mov      %0, %2\n\t"                   \
+      "bt       1b\n\t"                       \
+      "2:         \n\t"                       \
+     :"+r" (_a0), "+r"(__gret), "+r" (_tmp) :"r" (_a1) , "r" (_a2)    \
+     : "a3", "memory");                \
+    __gret; })
+
+# define __arch_compare_and_exchange_val_64_int(mem, newval, oldval) \
+	(abort (), 0)
+
+# define atomic_compare_and_exchange_bool_acq(mem, new, old)    \
+  __atomic_bool_bysize (__arch_compare_and_exchange_bool, int,  \
+            mem, new, old)
+
+# define atomic_compare_and_exchange_val_acq(mem, new, old) \
+  __atomic_val_bysize (__arch_compare_and_exchange_val, int,    \
+               mem, new, old)
+
+#endif