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/*
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/*
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 * Provisions are made to prevent compiler from reordering instructions itself.
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 * Provisions are made to prevent compiler from reordering instructions itself.
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 */
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 */
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#define CS_ENTER_BARRIER()  __asm__ volatile ("" ::: "memory")
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#define CS_ENTER_BARRIER()  asm volatile ("" ::: "memory")
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#define CS_LEAVE_BARRIER()  __asm__ volatile ("" ::: "memory")
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#define CS_LEAVE_BARRIER()  asm volatile ("" ::: "memory")
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static inline void cpuid_serialization(void)
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static inline void cpuid_serialization(void)
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{
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{
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    __asm__ volatile (
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    asm volatile (
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        "xorl %%eax, %%eax\n"
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        "xorl %%eax, %%eax\n"
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        "cpuid\n"
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        "cpuid\n"
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        ::: "eax", "ebx", "ecx", "edx", "memory"
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        ::: "eax", "ebx", "ecx", "edx", "memory"
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    );
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    );
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}
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}
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#ifdef CONFIG_FENCES_P4
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#ifdef CONFIG_FENCES_P4
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#   define memory_barrier()     __asm__ volatile ("mfence\n" ::: "memory")
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#   define memory_barrier()     asm volatile ("mfence\n" ::: "memory")
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#   define read_barrier()       __asm__ volatile ("lfence\n" ::: "memory")
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#   define read_barrier()       asm volatile ("lfence\n" ::: "memory")
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#   ifdef CONFIG_WEAK_MEMORY
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#   ifdef CONFIG_WEAK_MEMORY
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#       define write_barrier()  __asm__ volatile ("sfence\n" ::: "memory")
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#       define write_barrier()  asm volatile ("sfence\n" ::: "memory")
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#   else
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#   else
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#       define write_barrier()  __asm__ volatile( "" ::: "memory");
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#       define write_barrier()  asm volatile( "" ::: "memory");
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#   endif
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#   endif
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#elif CONFIG_FENCES_P3
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#elif CONFIG_FENCES_P3
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#   define memory_barrier()     cpuid_serialization()
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#   define memory_barrier()     cpuid_serialization()
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#   define read_barrier()       cpuid_serialization()
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#   define read_barrier()       cpuid_serialization()
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#   ifdef CONFIG_WEAK_MEMORY
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#   ifdef CONFIG_WEAK_MEMORY
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#       define write_barrier()  __asm__ volatile ("sfence\n" ::: "memory")
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#       define write_barrier()  asm volatile ("sfence\n" ::: "memory")
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#   else
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#   else
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#       define write_barrier()  __asm__ volatile( "" ::: "memory");
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#       define write_barrier()  asm volatile( "" ::: "memory");
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#   endif
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#   endif
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#else
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#else
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#   define memory_barrier()     cpuid_serialization()
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#   define memory_barrier()     cpuid_serialization()
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#   define read_barrier()       cpuid_serialization()
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#   define read_barrier()       cpuid_serialization()
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#   ifdef CONFIG_WEAK_MEMORY
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#   ifdef CONFIG_WEAK_MEMORY
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#       define write_barrier()  cpuid_serialization()
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#       define write_barrier()  cpuid_serialization()
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#   else
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#   else
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#       define write_barrier()  __asm__ volatile( "" ::: "memory");
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#       define write_barrier()  asm volatile( "" ::: "memory");
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#   endif
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#   endif
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#endif
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#endif
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#endif
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#endif
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