About

GCC does a fairly poor job at generating efficient code for various saturating arithmetic idioms.  Additionally almost no support for vectorized saturating arithmetic is in place.  This gap will show up in coremark pro and possibly spec2k6.  Followup items may include:

1. Making sure generated code is amenable to zicond when possible
2. Moving some of the target specific expansions into generic code

Stakeholders/Partners

RISE:

Intel: 1 Pan Li

External:

Dependencies

Status

Updates

03 Feb 2025 

• The vast majority of this work is done.  If there are followups of significance we'll create a new page.

09 Oct 2024 

• Pan Li continues to push improvements to the detection of saturating arithmetic idioms upstream
  • Scalar & Vector with extensive testsuites to verify codegen

04 Sep 2024

• Pan continues to upstream improvements in detection of scalar and vector saturating arithmetic 

29 Jun 2024

• New work item.  This work started in 1H2024.