Plan 9 from Bell Labs’s /usr/web/sources/contrib/fgb/root/sys/src/ape/lib/openssl/crypto/cast/asm/readme

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There is a ppro flag in cast-586 which turns on/off
generation of pentium pro/II friendly code

This flag makes the inner loop one cycle longer, but generates 
code that runs %30 faster on the pentium pro/II, while only %7 slower
on the pentium.  By default, this flag is on.


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