Uros Bizjak <ubiz...@gmail.com> writes:
> Introduce crc_rev<mode>si4 expanders to generate CRC32 instruction when using
> __builtin_rev_crc32_data* builtins with 0x1EDC6F41 poylnomial and -mcrc32.
>
> PR target/120719
>
> gcc/ChangeLog:
>
> * config/i386/i386.md (crc_rev<SWI124:mode>si4): New expander.
>
> gcc/testsuite/ChangeLog:
>
> * gcc.target/i386/crc-builtin-crc32.c: New test.
>
> Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
This is missing enabling the test cases crc-crc32c* for the CRC pattern
matching pass, which are currently only on aarch64/loongarch.
So we're not sure if it actually works for that.
Also of course it would be nice to support PCLMCLDQ too like ARM.
-Andi
