mirror of
https://github.com/checkpoint-restore/criu
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75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
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#ifndef __ARCH_S390_ATOMIC_OPS__
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#define __ARCH_S390_ATOMIC_OPS__
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#define __ATOMIC_OP(op_name, op_string) \
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static inline int op_name(int val, int *ptr) \
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{ \
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int old, new; \
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\
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asm volatile( \
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"0: lr %[new],%[old]\n" \
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op_string " %[new],%[val]\n" \
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" cs %[old],%[new],%[ptr]\n" \
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" jl 0b" \
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: [old] "=d" (old), [new] "=&d" (new), [ptr] "+Q" (*ptr)\
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: [val] "d" (val), "0" (*ptr) : "cc", "memory"); \
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return old; \
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}
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#define __ATOMIC_OPS(op_name, op_string) \
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__ATOMIC_OP(op_name, op_string) \
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__ATOMIC_OP(op_name##_barrier, op_string)
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__ATOMIC_OPS(__atomic_add, "ar")
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__ATOMIC_OPS(__atomic_and, "nr")
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__ATOMIC_OPS(__atomic_or, "or")
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__ATOMIC_OPS(__atomic_xor, "xr")
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#undef __ATOMIC_OPS
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#define __ATOMIC64_OP(op_name, op_string) \
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static inline long op_name(long val, long *ptr) \
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{ \
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long old, new; \
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\
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asm volatile( \
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"0: lgr %[new],%[old]\n" \
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op_string " %[new],%[val]\n" \
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" csg %[old],%[new],%[ptr]\n" \
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" jl 0b" \
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: [old] "=d" (old), [new] "=&d" (new), [ptr] "+Q" (*ptr)\
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: [val] "d" (val), "0" (*ptr) : "cc", "memory"); \
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return old; \
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}
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#define __ATOMIC64_OPS(op_name, op_string) \
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__ATOMIC64_OP(op_name, op_string) \
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__ATOMIC64_OP(op_name##_barrier, op_string)
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__ATOMIC64_OPS(__atomic64_add, "agr")
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__ATOMIC64_OPS(__atomic64_and, "ngr")
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__ATOMIC64_OPS(__atomic64_or, "ogr")
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__ATOMIC64_OPS(__atomic64_xor, "xgr")
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#undef __ATOMIC64_OPS
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static inline int __atomic_cmpxchg(int *ptr, int old, int new)
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{
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asm volatile(
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" cs %[old],%[new],%[ptr]"
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: [old] "+d" (old), [ptr] "+Q" (*ptr)
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: [new] "d" (new) : "cc", "memory");
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return old;
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}
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static inline long __atomic64_cmpxchg(long *ptr, long old, long new)
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{
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asm volatile(
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" csg %[old],%[new],%[ptr]"
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: [old] "+d" (old), [ptr] "+Q" (*ptr)
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: [new] "d" (new) : "cc", "memory");
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return old;
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}
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#endif /* __ARCH_S390_ATOMIC_OPS__ */
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