calog/vendor/tcl/compat/zlib/contrib/crc32vx/README
2026-07-04 23:22:22 -05:00

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Vendored

IBM Z mainframes starting from version z13 provide vector instructions, which
allows vectorization of crc32. This extension is build by default when targeting
ibm s390x. However this extension can disabled if desired:
# for configure build
$ ./configure --disable-crcvx
# for cmake build
$ cmake .. -DZLIB_CRC32VX=off