Now that gcc 3.4 has incompatible ABI changes (on o32 mostly affecting
mipsel) I've been discussing with Thiemo if I'd be the right point to
take this ABI change as a possibility to additionally reserve a TLS
He suggested $24 (t8) another discussed possibility would be $27 (k1)
which is already abused by the PS/2 folks for ll/sc emulation.
Another possibility would be to reserve such a register only in the
n32/n64 ABIs and let o32 stay without __thread and TLS forever.
Any feedback welcome.
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