https://bugzilla.redhat.com/show_bug.cgi?id=1753084
Bug ID: 1753084
Summary: Review Request: libdivide - Optimized integer division
Product: Fedora
Version: rawhide
Hardware: All
OS: Linux
Status: NEW
Component: Package Review
Severity: medium
Priority: medium
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
CC: [email protected]
Target Milestone: ---
Classification: Fedora
Spec URL: https://jjames.fedorapeople.org/libdivide/libdivide.spec
SRPM URL:
https://jjames.fedorapeople.org/libdivide/libdivide-2.0-1.fc32.src.rpm
Fedora Account System Username: jjames
Description: This package contains a header-only C/C++ library for optimizing
integer division. Integer division is one of the slowest instructions on most
CPUs, e.g. on current x64 CPUs a 64-bit integer division has a latency of up to
90 clock cycles whereas a multiplication has a latency of only 3 clock cycles.
libdivide allows you to replace expensive integer division instructions by a
sequence of shift, add and multiply instructions that will calculate the
integer division much faster.
On current CPUs you can get a speedup of up to 10x for 64-bit integer division
and a speedup of up to to 5x for 32-bit integer division when using libdivide.
libdivide also supports SSE2, AVX2 and AVX512 vector division which provides an
even larger speedup.
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