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SHLD isn't Any Faster than IMUL

Name: Anonymous 2019-07-30 9:57

https://software.intel.com/sites/default/files/managed/9e/bc/64-ia-32-architectures-optimization-manual.pdf


see instruction latency appendix. That means you can multiply without any hacks. But division is still much more expensive than right shift.

Name: Anonymous 2019-07-30 12:34

>>1
Thats because Intel decided bithacks aren't important, AMD shifts faster.
https://gmplib.org/~tege/x86-timing.pdf

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