Months ago I submitted http://openocd.zylin.com/#/c/5324/, and I would like to get a review of it. These are simple optimizations that make `-rtos hwthread` much more responsive by allowing access to specific registers without accessing a whole slew of registers. Full lists of registers are currently accessed all the time, because (I think) real RTOSs store them all in memory next to each other (on the stack?) so it's cheap to access a lot of them. This is not always true for real hardware. The problem is made worse by the fact that real hardware has a lot more registers. RTOSs typically only expose the general purpose and FPU registers.
Anyway, I'd love a review on this, so I can resume the process of pushing the RISC-V changes upstream. I'm not trying to make target-independent changes, but sometimes that is just clearly the best choice. Thank you, Tim
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