d521c6b9c4
functions are implemented with CMPXCHG8B instruction where it is available, i. e., all Pentium-class and later processors. Note this instruction is also used for atomic_store_rel_64() because a simple XCHG-like instruction for 64-bit memory access does not exist, unfortunately. If the processor lacks the instruction, i. e., 80486-class CPUs, two 32-bit load/store are performed with interrupt temporarily disabled, assuming it does not support SMP. Although this assumption may be little naive, it is true in reality. This implementation is inspired by Linux. |
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| .. | ||
| apm | ||
| cbus | ||
| compile | ||
| conf | ||
| include | ||
| linux | ||
| pc98 | ||