1 files changed, 121 insertions, 0 deletions
diff --git a/include/arch/x86_64/asm/atomic.h b/include/arch/x86_64/asm/atomic.h
new file mode 100644
index 00000000..b673c7e3
--- /dev/null
+++ b/include/arch/x86_64/asm/atomic.h
@@ -0,0 +1,121 @@
+#include <stdint.h>
+
+#define a_cas a_cas
+static inline int a_cas(volatile int *p, int t, int s)
+{
+	__asm__ __volatile__("lock ; cmpxchg %3, %1"
+			     : "=a"(t), "=m"(*p)
+			     : "a"(t), "r"(s)
+			     : "memory");
+	return t;
+}
+
+#define a_cas_p a_cas_p
+static inline void *a_cas_p(volatile void *p, void *t, void *s)
+{
+	__asm__("lock ; cmpxchg %3, %1"
+		: "=a"(t), "=m"(*(void *volatile *)p)
+		: "a"(t), "r"(s)
+		: "memory");
+	return t;
+}
+
+#define a_swap a_swap
+static inline int a_swap(volatile int *p, int v)
+{
+	__asm__ __volatile__("xchg %0, %1"
+			     : "=r"(v), "=m"(*p)
+			     : "0"(v)
+			     : "memory");
+	return v;
+}
+
+#define a_fetch_add a_fetch_add
+static inline int a_fetch_add(volatile int *p, int v)
+{
+	__asm__ __volatile__("lock ; xadd %0, %1"
+			     : "=r"(v), "=m"(*p)
+			     : "0"(v)
+			     : "memory");
+	return v;
+}
+
+#define a_and a_and
+static inline void a_and(volatile int *p, int v)
+{
+	__asm__ __volatile__("lock ; and %1, %0"
+			     : "=m"(*p)
+			     : "r"(v)
+			     : "memory");
+}
+
+#define a_or a_or
+static inline void a_or(volatile int *p, int v)
+{
+	__asm__ __volatile__("lock ; or %1, %0" : "=m"(*p) : "r"(v) : "memory");
+}
+
+#define a_and_64 a_and_64
+static inline void a_and_64(volatile uint64_t *p, uint64_t v)
+{
+	__asm__ __volatile("lock ; and %1, %0" : "=m"(*p) : "r"(v) : "memory");
+}
+
+#define a_or_64 a_or_64
+static inline void a_or_64(volatile uint64_t *p, uint64_t v)
+{
+	__asm__ __volatile__("lock ; or %1, %0" : "=m"(*p) : "r"(v) : "memory");
+}
+
+#define a_inc a_inc
+static inline void a_inc(volatile int *p)
+{
+	__asm__ __volatile__("lock ; incl %0" : "=m"(*p) : "m"(*p) : "memory");
+}
+
+#define a_dec a_dec
+static inline void a_dec(volatile int *p)
+{
+	__asm__ __volatile__("lock ; decl %0" : "=m"(*p) : "m"(*p) : "memory");
+}
+
+#define a_store a_store
+static inline void a_store(volatile int *p, int x)
+{
+	__asm__ __volatile__("mov %1, %0 ; lock ; orl $0,(%%rsp)"
+			     : "=m"(*p)
+			     : "r"(x)
+			     : "memory");
+}
+
+#define a_barrier a_barrier
+static inline void a_barrier()
+{
+	__asm__ __volatile__("" : : : "memory");
+}
+
+#define a_spin a_spin
+static inline void a_spin()
+{
+	__asm__ __volatile__("pause" : : : "memory");
+}
+
+#define a_crash a_crash
+static inline void a_crash()
+{
+	__asm__ __volatile__("hlt" : : : "memory");
+}
+
+#define a_ctz_64 a_ctz_64
+static inline int a_ctz_64(uint64_t x)
+{
+	__asm__("bsf %1,%0" : "=r"(x) : "r"(x));
+	return x;
+}
+
+#define a_clz_64 a_clz_64
+static inline int a_clz_64(uint64_t x)
+{
+	__asm__("bsr %1,%0 ; xor $63,%0" : "=r"(x) : "r"(x));
+	return x;
+}