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| author | Roman Lebedev <lebedev.ri@gmail.com> | 2021-08-27 13:23:27 +0300 |
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| committer | Roman Lebedev <lebedev.ri@gmail.com> | 2021-08-27 13:27:05 +0300 |
| commit | d4d459e7475b4bb0d15280f12ed669342fa5edcd (patch) | |
| tree | 24341ed280ad21c421299d5e7cff49916f99e57d /libcxx/include/__algorithm/includes.h | |
| parent | 0f04936a2d4e3ec7db681547876f7669c445af0e (diff) | |
| download | llvm-d4d459e7475b4bb0d15280f12ed669342fa5edcd.zip llvm-d4d459e7475b4bb0d15280f12ed669342fa5edcd.tar.gz llvm-d4d459e7475b4bb0d15280f12ed669342fa5edcd.tar.bz2 | |
[X86] AMD Zen 3: MULX w/ mem operand has the same throughput as with reg op
Exegesis is faulty and sometimes when measuring throughput^-1
produces snippets that have loop-carried dependencies,
which must be what caused me to incorrectly measure it originally.
After looking much more carefully, the inverse throughput should match
that of the MULX w/ reg op.
As per llvm-exegesis measurements.
Diffstat (limited to 'libcxx/include/__algorithm/includes.h')
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