mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-11-26 21:33:10 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 11

k_mul(): Repaired typo in comment.

Browse source
This commit is contained in:
Tim Peters 2002-08-12 02:43:58 +00:00
parent 5af4e6c739
commit 18c15b9bbd
1 changed files with 1 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
Objects/longobject.c
View file

@ -1562,7 +1562,7 @@ k_mul(PyLongObject *a, PyLongObject *b)
/* (ah*X+al)(bh*X+bl) = ah*bh*X*X + (ah*bl + al*bh)*X + al*bl /* (ah*X+al)(bh*X+bl) = ah*bh*X*X + (ah*bl + al*bh)*X + al*bl
* Let k = (ah+al)*(bh+bl) = ah*bl + al*bh + ah*bh + al*bl * Let k = (ah+al)*(bh+bl) = ah*bl + al*bh + ah*bh + al*bl
* Then the original product is * Then the original product is
* ah*bh*X*X + (k - ah*bh - ah*bl)*X + al*bl * ah*bh*X*X + (k - ah*bh - al*bl)*X + al*bl
* By picking X to be a power of 2, "*X" is just shifting, and it's * By picking X to be a power of 2, "*X" is just shifting, and it's
* been reduced to 3 multiplies on numbers half the size. * been reduced to 3 multiplies on numbers half the size.
*/ */