Bug 170 - high-to-low register-to-register copy needed
Summary: high-to-low register-to-register copy needed
Status: CONFIRMED
Alias: None
Product: Libre-SOC's first SoC
Classification: Unclassified
Component: Specification (show other bugs)
Version: unspecified
Hardware: Other Linux
: --- critical
Assignee: Luke Kenneth Casson Leighton
URL:
Depends on:
Blocks: 52
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Reported: 2020-02-04 19:01 GMT by Jacob Lifshay
Modified: 2020-02-04 19:08 GMT (History)
2 users (show)

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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.