https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79217
Bug ID: 79217
Summary: Feature request: high half of a multiplication
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: hpa at zytor dot com
Target Milestone: ---
There is no standard way in C to obtain the high half of a multiplication for
the largest integer data type supported. gcc has __int128 on 64-bit platforms,
but not on 32-bit platforms; futhermore, it is sort of an infinite loop of
adding integer data types.
We could certainly use this in the Linux kernel, and hopefully should
eventually be included in the C standard.
