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| Version 5 (modified by Gedare, on 04/05/13 at 20:12:08) (diff) |
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Atomic support
Architectures atomic support
The following table summarizes the atomic support among the CPU architectures supported by the git development head. The RTEMS-SMP means whether the SMP mode is supported by the latest SMP. The atomic-hardware means whether the architecture has atomic hardware instruction support.
{| border="1" style="margin: 1em auto 1em auto;text-align: center;" |+
| Target CPU | RTEMS SMP | atomic-hardware | atomic-instruction | memory-ordering |
| i386 | Yes | Yes | cmpxchg | Stronger |
| powerpc | No | Yes | lwarx/stwcx | Weaker |
| sparc | No | Yes | ldstub/swap | Stronger (TSO-mode) |
| sparc64 | No | Yes | ldstub/swap/cas | Stronger (TSO-mode) |
| mips | No | Yes | ll/sc | Weaker |
| arm | No | Yes (V6 above) | ldstub/swap (V6 above) | Weaker |
| m68k | No | Yes | cad/cas32/tas | |
| bfin | No | no | no | |
| sh | No | Yes | ||
|}
