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#ifndef KERN_ia64_ATOMIC_H_
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#ifndef KERN_ia64_ATOMIC_H_
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#define KERN_ia64_ATOMIC_H_
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#define KERN_ia64_ATOMIC_H_
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/** Atomic addition.
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/** Atomic addition.
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 *
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 *
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 * @param val Atomic value.
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 * @param val       Atomic value.
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 * @param imm Value to add.
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 * @param imm       Value to add.
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 *
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 *
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 * @return Value before addition.
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 * @return      Value before addition.
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 */
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 */
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static inline long atomic_add(atomic_t *val, int imm)
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static inline long atomic_add(atomic_t *val, int imm)
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{
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{
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    long v;
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    long v;
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    asm volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm));
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    asm volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v),
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        "+m" (val->count) : "i" (imm));
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    return v;
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    return v;
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}
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}
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static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); }
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static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); }
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static inline uint64_t test_and_set(atomic_t *val) {
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    uint64_t v;
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    asm volatile (
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        "movl %0 = 0x01;;\n"
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        "xchg8 %0 = %1, %0;;\n"
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        : "=r" (v), "+m" (val->count)
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    );
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    return v;
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}
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static inline void atomic_inc(atomic_t *val)
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{
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    atomic_add(val, 1);
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}
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static inline void atomic_dec(atomic_t *val)
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{
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    atomic_add(val, -1);
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}
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static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; }
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static inline long atomic_preinc(atomic_t *val)
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{
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    return atomic_add(val, 1) + 1;
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}
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static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; }
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static inline long atomic_predec(atomic_t *val)
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{
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    return atomic_add(val, -1) - 1;
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}
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static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1); }
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static inline long atomic_postinc(atomic_t *val)
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{
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    return atomic_add(val, 1);
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}
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static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1); }
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static inline long atomic_postdec(atomic_t *val)
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{
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    return atomic_add(val, -1);
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}
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#endif
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#endif
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/** @}
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/** @}
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 */
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 */