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Diffstat (limited to 'compiler/GHC/Cmm/MachOp.hs')
| -rw-r--r-- | compiler/GHC/Cmm/MachOp.hs | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/compiler/GHC/Cmm/MachOp.hs b/compiler/GHC/Cmm/MachOp.hs index b5aa278ad7..7004fece51 100644 --- a/compiler/GHC/Cmm/MachOp.hs +++ b/compiler/GHC/Cmm/MachOp.hs @@ -669,9 +669,11 @@ data CallishMachOp | MO_AtomicRMW Width AtomicMachOp | MO_AtomicRead Width | MO_AtomicWrite Width + -- | Atomic compare-and-swap. Arguments are @[dest, expected, new]@. + -- Sequentially consistent. + -- Possible future refactoring: should this be an'MO_AtomicRMW' variant? | MO_Cmpxchg Width - -- Should be an AtomicRMW variant eventually. - -- Sequential consistent. + -- | Atomic swap. Arguments are @[dest, new]@ | MO_Xchg Width -- These rts provided functions are special: suspendThread releases the |