Skip to content

[0035] Small update to clarify dimension requirements #738

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 2 commits into
base: main
Choose a base branch
from
Open

[0035] Small update to clarify dimension requirements #738

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
b3505a0
Small update to language to clarify dimension requirements
llvm-beanz Nov 18, 2025
da81c9e
Simplify range of valid values
llvm-beanz Nov 19, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
16 changes: 8 additions & 8 deletions proposals/0035-linalg-matrix.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -451,16 +451,16 @@ formula: `MxK * KxN = MxN`
This restriction impacts the number of rows in an A matrix, and columns in a B
matrix, but has no impact on an accumulator matrix.

The minimum and maximum `K` dimension for Wave and Thread scope matrices is tied
to the the minimum and maximum wave size, while the minimum and maximum `K`
dimension for ThreadGroup matrices is tied to the thread group size.
The minimum and maximum `K` dimension for matrices is hardware dependent and
varies by scope. The table below describes the maximums enforced by HLSL and
DXIL validation.


| Matrix Scope | Scalar element dimensions |
| ------------ | ----------------------------- |
| Thread | Powers of two between [4,128] |
| Wave | Powers of two between [4,128] |
| ThreadGroup | [1,1024] |
| Matrix Scope | Scalar element dimensions |
| ------------ | ------------------------- |
| Thread | [4,128] |
| Wave | [4,128] |
| ThreadGroup | [1,1024] |

Sizes for matrices of packed data types are 4 times the valid size for a scalar
element.
Expand Down