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Updates
- Simple tests using this code to detect a CRC loop that is compatible with the x86 crc32 instruction and generating the crc32 instruction for such loops show using the crc32 instruction is at least 5X faster than a loop.
- Currently investigating generating aarch64 clmul as there is a bit time to do this as a proof of concept before focusing on the upstreaming effort.
- It had been speculated that this work could generate a "crc" instruction on suitable ISAs if a loop with the right field polynomial were encountered. This has been implemented as a proof of concept on x86
- It has also been speculated that this work could be used to detect clmul idioms outside of a CRC loop. This appears to work by relaxing various aspects of the CRC loop verifier. It is not an area of focus though.
- Minor bugs have been fixed in the implementation as it is prepared for upstreaming. Goal is still integration for gcc-15 in the late spring.
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