Cleanup: remove unused value warning

[urcu.git] / urcu / uatomic_arch_x86.h

diff --git a/urcu/uatomic_arch_x86.h b/urcu/uatomic_arch_x86.h
index 3bfe86d0a31f35e9a3f04a1c5079811b8971e167..aed513b67b4146f8f50bf52f133de0079611d97c 100644 (file)
--- a/urcu/uatomic_arch_x86.h
+++ b/urcu/uatomic_arch_x86.h
@@ -23,22 +23,13 @@
 #include <urcu/compiler.h>
 #include <urcu/system.h>
 
+#define UATOMIC_HAS_ATOMIC_BYTE
+#define UATOMIC_HAS_ATOMIC_SHORT
+
 #ifdef __cplusplus
 extern "C" {
 #endif 
 
-#ifndef __SIZEOF_LONG__
-#if defined(__x86_64__) || defined(__amd64__)
-#define __SIZEOF_LONG__ 8
-#else
-#define __SIZEOF_LONG__ 4
-#endif
-#endif
-
-#ifndef BITS_PER_LONG
-#define BITS_PER_LONG  (__SIZEOF_LONG__ * 8)
-#endif
-
 /*
  * Derived from AO_compare_and_swap() and AO_test_and_set_full().
  */
@@ -48,8 +39,7 @@ struct __uatomic_dummy {
 };
 #define __hp(x)        ((struct __uatomic_dummy *)(x))
 
-#define _uatomic_set(addr, v)  STORE_SHARED(*(addr), (v))
-#define _uatomic_read(addr)    LOAD_SHARED(*(addr))
+#define _uatomic_set(addr, v)  CMM_STORE_SHARED(*(addr), (v))
 
 /* cmpxchg */
 
@@ -91,7 +81,7 @@ unsigned long __uatomic_cmpxchg(void *addr, unsigned long old,
                        : "memory");
                return result;
        }
-#if (BITS_PER_LONG == 64)
+#if (CAA_BITS_PER_LONG == 64)
        case 8:
        {
                unsigned long result = old;
@@ -153,7 +143,7 @@ unsigned long __uatomic_exchange(void *addr, unsigned long val, int len)
                        : "memory");
                return result;
        }
-#if (BITS_PER_LONG == 64)
+#if (CAA_BITS_PER_LONG == 64)
        case 8:
        {
                unsigned long result;
@@ -176,7 +166,7 @@ unsigned long __uatomic_exchange(void *addr, unsigned long val, int len)
        ((__typeof__(*(addr))) __uatomic_exchange((addr), (unsigned long)(v), \
                                                sizeof(*(addr))))
 
-/* uatomic_add_return, uatomic_sub_return */
+/* uatomic_add_return */
 
 static inline __attribute__((always_inline))
 unsigned long __uatomic_add_return(void *addr, unsigned long val,
@@ -216,7 +206,7 @@ unsigned long __uatomic_add_return(void *addr, unsigned long val,
                        : "memory");
                return result + (unsigned int)val;
        }
-#if (BITS_PER_LONG == 64)
+#if (CAA_BITS_PER_LONG == 64)
        case 8:
        {
                unsigned long result = val;
@@ -241,9 +231,7 @@ unsigned long __uatomic_add_return(void *addr, unsigned long val,
                                                  (unsigned long)(v),   \
                                                  sizeof(*(addr))))
 
-#define _uatomic_sub_return(addr, v)   _uatomic_add_return((addr), -(v))
-
-/* uatomic_add, uatomic_sub */
+/* uatomic_add */
 
 static inline __attribute__((always_inline))
 void __uatomic_add(void *addr, unsigned long val, int len)
@@ -276,7 +264,7 @@ void __uatomic_add(void *addr, unsigned long val, int len)
                        : "memory");
                return;
        }
-#if (BITS_PER_LONG == 64)
+#if (CAA_BITS_PER_LONG == 64)
        case 8:
        {
                __asm__ __volatile__(
@@ -297,8 +285,6 @@ void __uatomic_add(void *addr, unsigned long val, int len)
 #define _uatomic_add(addr, v)                                             \
        (__uatomic_add((addr), (unsigned long)(v), sizeof(*(addr))))
 
-#define _uatomic_sub(addr, v)  _uatomic_add((addr), -(v))
-
 
 /* uatomic_inc */
 
@@ -333,7 +319,7 @@ void __uatomic_inc(void *addr, int len)
                        : "memory");
                return;
        }
-#if (BITS_PER_LONG == 64)
+#if (CAA_BITS_PER_LONG == 64)
        case 8:
        {
                __asm__ __volatile__(
@@ -386,7 +372,7 @@ void __uatomic_dec(void *addr, int len)
                        : "memory");
                return;
        }
-#if (BITS_PER_LONG == 64)
+#if (CAA_BITS_PER_LONG == 64)
        case 8:
        {
                __asm__ __volatile__(
@@ -406,7 +392,7 @@ void __uatomic_dec(void *addr, int len)
 
 #define _uatomic_dec(addr)     (__uatomic_dec((addr), sizeof(*(addr))))
 
-#if ((BITS_PER_LONG != 64) && defined(CONFIG_RCU_COMPAT_ARCH))
+#if ((CAA_BITS_PER_LONG != 64) && defined(CONFIG_RCU_COMPAT_ARCH))
 extern int __rcu_cas_avail;
 extern int __rcu_cas_init(void);
 
@@ -449,36 +435,29 @@ extern unsigned long _compat_uatomic_xchg(void *addr,
                                                (unsigned long)(v),            \
                                                sizeof(*(addr))))
 
-#define compat_uatomic_sub_return(addr, v)                                    \
-               compat_uatomic_add_return((addr), -(v))
 #define compat_uatomic_add(addr, v)                                           \
                ((void)compat_uatomic_add_return((addr), (v)))
-#define compat_uatomic_sub(addr, v)                                           \
-               ((void)compat_uatomic_sub_return((addr), (v)))
 #define compat_uatomic_inc(addr)                                              \
                (compat_uatomic_add((addr), 1))
 #define compat_uatomic_dec(addr)                                              \
-               (compat_uatomic_sub((addr), 1))
+               (compat_uatomic_add((addr), -1))
 
 #else
 #define UATOMIC_COMPAT(insn)   (_uatomic_##insn)
 #endif
 
 /* Read is atomic even in compat mode */
-#define uatomic_read(addr)     _uatomic_read(addr)
-
 #define uatomic_set(addr, v)                   \
                UATOMIC_COMPAT(set(addr, v))
+
 #define uatomic_cmpxchg(addr, old, _new)       \
                UATOMIC_COMPAT(cmpxchg(addr, old, _new))
 #define uatomic_xchg(addr, v)                  \
                UATOMIC_COMPAT(xchg(addr, v))
 #define uatomic_add_return(addr, v)            \
                UATOMIC_COMPAT(add_return(addr, v))
-#define uatomic_sub_return(addr, v)            \
-               UATOMIC_COMPAT(sub_return(addr, v))
+
 #define uatomic_add(addr, v)   UATOMIC_COMPAT(add(addr, v))
-#define uatomic_sub(addr, v)   UATOMIC_COMPAT(sub(addr, v))
 #define uatomic_inc(addr)      UATOMIC_COMPAT(inc(addr))
 #define uatomic_dec(addr)      UATOMIC_COMPAT(dec(addr))
 
@@ -486,4 +465,6 @@ extern unsigned long _compat_uatomic_xchg(void *addr,
 }
 #endif
 
+#include <urcu/uatomic_generic.h>
+
 #endif /* _URCU_ARCH_UATOMIC_X86_H */