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| author | Clint Caywood <caywood@google.com> | 2022-01-20 23:27:05 +0000 |
|---|---|---|
| committer | Siva Chandra Reddy <sivachandra@google.com> | 2022-01-20 23:32:34 +0000 |
| commit | d92e5412ea571158b5b524855d19b5eafa0567ce (patch) | |
| tree | 0e00c7dccdcbfcbac53ade4dcaf438c4ae26f1e0 /lldb/source/Plugins/ScriptInterpreter/Python/PythonReadline.h | |
| parent | ac2f3df8396ac5bc507bd84eec185d756420e47c (diff) | |
| download | llvm-d92e5412ea571158b5b524855d19b5eafa0567ce.zip llvm-d92e5412ea571158b5b524855d19b5eafa0567ce.tar.gz llvm-d92e5412ea571158b5b524855d19b5eafa0567ce.tar.bz2 | |
[libc] Use __builtin_clz to find leading 1 in hypot
This is an optimization that using a single CPU instruction on supported
architectures (amd64 and aarch64, but possibly others) to replace what was
previously an iterative look-up-table algorithm.
Originally I suggested using inline assembly for this in
https://reviews.llvm.org/D117584.
Reviewed By: lntue, sivachandra
Differential Revision: https://reviews.llvm.org/D117684
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python/PythonReadline.h')
0 files changed, 0 insertions, 0 deletions