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* bump snarkvm rev * update default gitignore * impl leo execute * bump snarkvm 0.14.5 * modify examples wip * update run.sh examples * impl env file * clippy warning * fix auction example * fix auction example env * generate new private key for new env - tests failing due to env not found err * commit error changes * Fix tests; clippy * Get examples working * leo build checks that build dir is well formed; clippy * Clean up * Update examples/README.md Co-authored-by: d0cd <pranavsaig@gmail.com> Signed-off-by: Collin Chin <16715212+collinc97@users.noreply.github.com> * do not commit .avm files * use snarkvm commands --------- Signed-off-by: Collin Chin <16715212+collinc97@users.noreply.github.com> Co-authored-by: Pranav Gaddamadugu <pranav@aleo.org> Co-authored-by: d0cd <pranavsaig@gmail.com> |
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src/ntzreisers.leo
Build Guide
To compile and run this Leo program, run:
leo run
The Algorithm
This algorithm is detailed in "Hacker's Delight, 2nd edition" by Henry S. Warren, section 5-4, figure 5-27.
First we isolate the rightmost 1 bit in the 32-bit input by
using the C idiom x & (-x). In Leo, the -x is
written as 0u32.sub_wrapped(x).
The smallest constant was found that has the property that when it was used to divide the 33 arguments 0, 1, 2, ..., 2**31, the remainder is different for each argument. This constant is 37.
In the algorithm, the remainder is used as an index into a table of size 37, with 4 entries unused. The table's values were chosen so that they give the correct number of trailing zeros for the inputs.
This algorithm was proposed by John Reiser in the comp.arch.arithmetic newsgroup on December 11, 1998: https://groups.google.com/g/comp.arch.arithmetic/c/yBt-QHRVEGE/m/QcQ75P6tmJ4J