pezkuwichain/pezkuwi-subxt
1
0
Fork 0
mirror of https://github.com/pezkuwichain/pezkuwi-subxt.git synced 2026-06-15 18:31:05 +00:00
Code Issues Packages Projects Releases Wiki Activity

frame: base 2 pow is just a shift left op (#5393)

Browse Source
This commit is contained in:
Bernhard Schuster
2020-03-25 10:50:22 +01:00
committed by GitHub
parent 8a41ac664b
commit d4093af110
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/frame/staking/reward-curve/src/log.rs
+4 -4
View File
@@ -14,13 +14,13 @@ pub fn log2(p: u32, q: u32) -> u32 {
} }
let mut n = 0u32; let mut n = 0u32;
while !(p >= 2u32.pow(n)*q) || !(p < 2u32.pow(n+1)*q) { while !(p >= (1u32 << n)*q) || !(p < (1u32 << (n+1))*q) {
n += 1; n += 1;
} }
assert!(p < 2u32.pow(n+1) * q); assert!(p < (1u32 << (n+1)) * q);
let y_num: u32 = (p - 2u32.pow(n) * q).try_into().unwrap(); let y_num: u32 = (p - (1u32 << n) * q).try_into().unwrap();
let y_den: u32 = (p + 2u32.pow(n) * q).try_into().unwrap(); let y_den: u32 = (p + (1u32 << n) * q).try_into().unwrap();
let _2_div_ln_2 = 2_885_390u32; let _2_div_ln_2 = 2_885_390u32;