Bug 170

Summary: high-to-low register-to-register copy needed
Product: Libre-SOC's first SoC Reporter: Jacob Lifshay <programmerjake>
Component: SpecificationAssignee: Luke Kenneth Casson Leighton <lkcl>
Status: CONFIRMED ---    
Severity: critical CC: libre-soc-bugs, programmerjake
Priority: ---    
Version: unspecified   
Hardware: Other   
OS: Linux   
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Bug Blocks: 52    

Description Jacob Lifshay 2020-02-04 19:01:15 GMT 
like memmove, but for registers.

It handles cases where (for example), the register allocator allocates a vector to registers r20-40, then later needs to move it to r10-30. Copying to a temporary location isn't a good solution since there may not be enough spare registers and load/store is much slower.