StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POalgorithm to multiply 64 bit numbers using 32 bit unsigned integers
primarykey
Id
7570005
data
AcceptedAnswerId
0
AnswerCount
2
ClosedDate
CommentCount
8
CommunityOwnedDate
CreationDate
2011-09-27T13:31:16.477
FavoriteCount
0
LastActivityDate
2011-09-28T12:39:25.143
LastEditDate
LastEditorUserId
0
OwnerUserId
491807
ParentId
0
PostTypeId
1
Score
2
ViewCount
2693
LastEditorDisplayName
text
Body
<p>I have 64 bit numbers (63 bits + sign bit), represented as two's complement numbers, stored in two unsigned 32 bit integers.</p> <pre><code>struct Long { uint32 high; uint32 low; } </code></pre> <p>How can i implement a multiplication algorithm, using just 32 bit numbers, and check that the result fits in 63 bits, i want to return an error code indicating overflow if the result doesn't fit.</p>
Tags
<c++><c><algorithm>
Title
algorithm to multiply 64 bit numbers using 32 bit unsigned integers
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USJosé
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
2. PO
  singulars
  PostTypePostTypeId
  PTAnswer
VotesPostIdCreationDate
1. VO
  singulars
  PostPostId
  POalgorithm to multiply 64 bit numbers using 32 bit unsigned integers
  UserUserId
  This table or related slice is empty.
  VoteTypeVoteTypeId
  VTUpMod
2. VO
  singulars
  PostPostId
  POalgorithm to multiply 64 bit numbers using 32 bit unsigned integers
  UserUserId
  This table or related slice is empty.
  VoteTypeVoteTypeId
  VTUpMod
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.