Andi Kleen wrote:
I would rather pass the register to the macro? If you start to
clobber registers you would need to pass in the tmp registers
too I guess.
The intent is that these code sequences can be patched in place, so they
need to have a specific abi at the machine-code level. Some of the
operations whose Xen implementation clobbers a register have that in
their definition, on the assumption that 1 temp is enough, and that
another interface which needs more can organize save/restoring registers
for itself.
J
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