--
-We could use the generic floating-point forms of LOAD COMPLEMENT,
-LOAD NEGATIVE and LOAD POSITIVE in cases where we don't need the
-condition codes. For example, we could use LCDFR instead of LCDBR.
-
---
-
We only use MVC, XC and CLC for constant-length block operations.
We could extend them to variable-length operations too,
using EXECUTE RELATIVE LONG.
--
-Atomic loads and stores use the default compare-and-swap based implementation.
-This is much too conservative in practice, since the architecture guarantees
-that 1-, 2-, 4- and 8-byte loads and stores to aligned addresses are
-inherently atomic.
-
---
-
If needed, we can support 16-byte atomics using LPQ, STPQ and CSDG.
--
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