Arm backend: Support a8w4 for convolution and linear. - #16577

Merged
Erik-Lundell merged 2 commits into
pytorch:mainfrom
Erik-Lundell:int4
Jan 14, 2026
Merged

Arm backend: Support a8w4 for convolution and linear.#16577
Erik-Lundell merged 2 commits into
pytorch:mainfrom
Erik-Lundell:int4

Conversation

@Erik-Lundell

@Erik-LundellErik-Lundell commented Jan 14, 2026•
edited by pytorch-bot Bot
Loading

Copy link
Copy Markdown
Collaborator

Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't
have int4, the dtype is carried in an int8, quantized with
qmin=-7, qmax=7. This can then be detected when folding qparams
to add the tosa_special_dtype meta.
Some additional changes are needed to make sure the meta survives
all the way to TOSA.

Tests are added to conv2d, conv3d, depthwise conv, and linear.
One conv2d test case was actually dw conv, so it was modified.

cc @freddan80@per@zingo@oscarandersson8218@digantdesai

@Erik-Lundell
Arm backend: Support a8w4 for convolution and linear.
7b6bc55
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't
have int4, the dtype is carried in an int8, quantized with
qmin=-7, qmax=7. This can then be detected when folding qparams
to add the tosa_special_dtype meta.
Some additional changes are needed to make sure the meta survives
all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.
One conv2d test case was actually dw conv, so it was modified.
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Iedcc45f2e419c261fd3205981fa632736c69524d
@Erik-Lundell
Arm backend: Fix test names
4d157fc
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Id0cd35dead7558346424bba9e7712b36e90f5429
@pytorch-bot

pytorch-botBot commented Jan 14, 2026•
edited
Loading

Copy link
Copy Markdown

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16577

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

❌ 1 New Failure, 1 Unrelated Failure

As of commit 4d157fc with merge base 9ba1b5d (image):

NEW FAILURE - The following job has failed:

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

This comment was automatically generated by Dr. CI and updates every 15 minutes.

@meta-clameta-claBot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Jan 14, 2026
@Erik-LundellErik-Lundell added partner: arm For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm release notes: arm Changes to the ARM backend delegate ciflow/trunk and removed CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. labels Jan 14, 2026
zingo
zingo approved these changes Jan 14, 2026
View reviewed changes

@zingozingo left a comment

Copy link
Copy Markdown
Collaborator

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

OK to merge if/when all Arm backend and cortex-m tests passes!

@meta-clameta-claBot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Jan 14, 2026
@Erik-Lundell
Erik-Lundell merged commit a9d8230 into pytorch:mainJan 14, 2026
306 of 321 checks passed
@Erik-Lundell
Erik-Lundell deleted the int4 branch February 4, 2026 15:44
Sign up for freeto join this conversation on GitHub. Already have an account? Sign in to comment

Reviewers

@zingozingozingo approved these changes
@digantdesaidigantdesaiAwaiting requested review from digantdesaidigantdesai is a code owner

Assignees

No one assigned

Labels

ciflow/trunkCLA SignedThis label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.partner: armFor backend delegation, kernels, demo, etc. from the 3rd-party partner, Armrelease notes: armChanges to the ARM backend delegate

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

2 participants

@Erik-Lundell@zingo
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
Arm backend: Support a8w4 for convolution and linear. - #16577
Merged
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Jan 14, 2026
Merged
Arm backend: Support a8w4 for convolution and linear.#16577
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Conversation
@Erik-Lundell
@Erik-LundellErik-Lundell
commented
Jan 14, 2026•

edited by pytorch-bot
Bot
Loading

Copy link


Copy Markdown

Collaborator
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't

have int4, the dtype is carried in an int8, quantized with

qmin=-7, qmax=7. This can then be detected when folding qparams

to add the tosa_special_dtype meta.

Some additional changes are needed to make sure the meta survives

all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.

One conv2d test case was actually dw conv, so it was modified.
cc @freddan80@per@zingo@oscarandersson8218@digantdesai
@Erik-Lundell
Arm backend: Support a8w4 for convolution and linear.
7b6bc55
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't
have int4, the dtype is carried in an int8, quantized with
qmin=-7, qmax=7. This can then be detected when folding qparams
to add the tosa_special_dtype meta.
Some additional changes are needed to make sure the meta survives
all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.
One conv2d test case was actually dw conv, so it was modified.
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Iedcc45f2e419c261fd3205981fa632736c69524d
@Erik-Lundell
Arm backend: Fix test names
4d157fc
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Id0cd35dead7558346424bba9e7712b36e90f5429
@pytorch-bot
pytorch-botBot
commented
Jan 14, 2026•

edited

Loading

Copy link


Copy Markdown

🔗 Helpful Links
🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16577
Note: Links to docs will display an error until the docs builds have been completed.
❗ 1 Active SEVs
There are 1 currently active SEVs. If your PR is affected, please view them below:
❌ 1 New Failure, 1 Unrelated Failure
As of commit 4d157fc with merge base 9ba1b5d (image):
NEW FAILURE - The following job has failed:
UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:
This comment was automatically generated by Dr. CI and updates every 15 minutes.
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-LundellErik-Lundell
added

partner: arm
For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm
release notes: arm
Changes to the ARM backend delegate
ciflow/trunk

and removed

CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
labels
Jan 14, 2026
zingo
zingo
approved these changes
Jan 14, 2026
View reviewed changes
@zingozingo
left a comment


Copy link


Copy Markdown

Collaborator
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

OK to merge if/when all Arm backend and cortex-m tests passes!
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-Lundell
Erik-Lundell
merged commit a9d8230
into
pytorch:mainJan 14, 2026

306 of 321 checks passed

@Erik-Lundell
Erik-Lundell
deleted the

int4

branch
February 4, 2026 15:44
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

Reviewers

@zingozingozingo approved these changes
@digantdesaidigantdesaiAwaiting requested review from digantdesaidigantdesai is a code owner

Assignees


No one assigned


Labels

ciflow/trunkCLA SignedThis label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.partner: armFor backend delegation, kernels, demo, etc. from the 3rd-party partner, Armrelease notes: armChanges to the ARM backend delegate

Projects


None yet


Milestone


No milestone


Development

Successfully merging this pull request may close these issues.

2 participants

@Erik-Lundell@zingo

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Arm backend: Support a8w4 for convolution and linear. - #16577
Merged
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Jan 14, 2026
Merged
Arm backend: Support a8w4 for convolution and linear.#16577
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Conversation
@Erik-Lundell
@Erik-LundellErik-Lundell
commented
Jan 14, 2026•

edited by pytorch-bot
Bot
Loading

Copy link


Copy Markdown

Collaborator
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't

have int4, the dtype is carried in an int8, quantized with

qmin=-7, qmax=7. This can then be detected when folding qparams

to add the tosa_special_dtype meta.

Some additional changes are needed to make sure the meta survives

all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.

One conv2d test case was actually dw conv, so it was modified.
cc @freddan80@per@zingo@oscarandersson8218@digantdesai
@Erik-Lundell
Arm backend: Support a8w4 for convolution and linear.
7b6bc55
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't
have int4, the dtype is carried in an int8, quantized with
qmin=-7, qmax=7. This can then be detected when folding qparams
to add the tosa_special_dtype meta.
Some additional changes are needed to make sure the meta survives
all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.
One conv2d test case was actually dw conv, so it was modified.
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Iedcc45f2e419c261fd3205981fa632736c69524d
@Erik-Lundell
Arm backend: Fix test names
4d157fc
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Id0cd35dead7558346424bba9e7712b36e90f5429
@pytorch-bot
pytorch-botBot
commented
Jan 14, 2026•

edited

Loading

Copy link


Copy Markdown

🔗 Helpful Links
🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16577
Note: Links to docs will display an error until the docs builds have been completed.
❗ 1 Active SEVs
There are 1 currently active SEVs. If your PR is affected, please view them below:
❌ 1 New Failure, 1 Unrelated Failure
As of commit 4d157fc with merge base 9ba1b5d (image):
NEW FAILURE - The following job has failed:
UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:
This comment was automatically generated by Dr. CI and updates every 15 minutes.
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-LundellErik-Lundell
added

partner: arm
For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm
release notes: arm
Changes to the ARM backend delegate
ciflow/trunk

and removed

CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
labels
Jan 14, 2026
zingo
zingo
approved these changes
Jan 14, 2026
View reviewed changes
@zingozingo
left a comment


Copy link


Copy Markdown

Collaborator
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

OK to merge if/when all Arm backend and cortex-m tests passes!
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-Lundell
Erik-Lundell
merged commit a9d8230
into
pytorch:mainJan 14, 2026

306 of 321 checks passed

@Erik-Lundell
Erik-Lundell
deleted the

int4

branch
February 4, 2026 15:44
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

Reviewers

@zingozingozingo approved these changes
@digantdesaidigantdesaiAwaiting requested review from digantdesaidigantdesai is a code owner

Assignees


No one assigned


Labels

ciflow/trunkCLA SignedThis label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.partner: armFor backend delegation, kernels, demo, etc. from the 3rd-party partner, Armrelease notes: armChanges to the ARM backend delegate

Projects


None yet


Milestone


No milestone


Development

Successfully merging this pull request may close these issues.

2 participants

@Erik-Lundell@zingo

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Arm backend: Support a8w4 for convolution and linear. - #16577
Merged
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Jan 14, 2026
Merged
Arm backend: Support a8w4 for convolution and linear.#16577
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Conversation
@Erik-Lundell
@Erik-LundellErik-Lundell
commented
Jan 14, 2026•

edited by pytorch-bot
Bot
Loading

Copy link


Copy Markdown

Collaborator
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't

have int4, the dtype is carried in an int8, quantized with

qmin=-7, qmax=7. This can then be detected when folding qparams

to add the tosa_special_dtype meta.

Some additional changes are needed to make sure the meta survives

all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.

One conv2d test case was actually dw conv, so it was modified.
cc @freddan80@per@zingo@oscarandersson8218@digantdesai
@Erik-Lundell
Arm backend: Support a8w4 for convolution and linear.
7b6bc55
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't
have int4, the dtype is carried in an int8, quantized with
qmin=-7, qmax=7. This can then be detected when folding qparams
to add the tosa_special_dtype meta.
Some additional changes are needed to make sure the meta survives
all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.
One conv2d test case was actually dw conv, so it was modified.
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Iedcc45f2e419c261fd3205981fa632736c69524d
@Erik-Lundell
Arm backend: Fix test names
4d157fc
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Id0cd35dead7558346424bba9e7712b36e90f5429
@pytorch-bot
pytorch-botBot
commented
Jan 14, 2026•

edited

Loading

Copy link


Copy Markdown

🔗 Helpful Links
🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16577
Note: Links to docs will display an error until the docs builds have been completed.
❗ 1 Active SEVs
There are 1 currently active SEVs. If your PR is affected, please view them below:
❌ 1 New Failure, 1 Unrelated Failure
As of commit 4d157fc with merge base 9ba1b5d (image):
NEW FAILURE - The following job has failed:
UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:
This comment was automatically generated by Dr. CI and updates every 15 minutes.
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-LundellErik-Lundell
added

partner: arm
For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm
release notes: arm
Changes to the ARM backend delegate
ciflow/trunk

and removed

CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
labels
Jan 14, 2026
zingo
zingo
approved these changes
Jan 14, 2026
View reviewed changes
@zingozingo
left a comment


Copy link


Copy Markdown

Collaborator
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

OK to merge if/when all Arm backend and cortex-m tests passes!
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-Lundell
Erik-Lundell
merged commit a9d8230
into
pytorch:mainJan 14, 2026

306 of 321 checks passed

@Erik-Lundell
Erik-Lundell
deleted the

int4

branch
February 4, 2026 15:44
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

Reviewers

@zingozingozingo approved these changes
@digantdesaidigantdesaiAwaiting requested review from digantdesaidigantdesai is a code owner

Assignees


No one assigned


Labels

ciflow/trunkCLA SignedThis label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.partner: armFor backend delegation, kernels, demo, etc. from the 3rd-party partner, Armrelease notes: armChanges to the ARM backend delegate

Projects


None yet


Milestone


No milestone


Development

Successfully merging this pull request may close these issues.

2 participants

@Erik-Lundell@zingo

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
Arm backend: Support a8w4 for convolution and linear. - #16577
Merged
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Jan 14, 2026
Merged
Arm backend: Support a8w4 for convolution and linear.#16577
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Conversation
@Erik-Lundell
@Erik-LundellErik-Lundell
commented
Jan 14, 2026•

edited by pytorch-bot
Bot
Loading

Copy link


Copy Markdown

Collaborator
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't

have int4, the dtype is carried in an int8, quantized with

qmin=-7, qmax=7. This can then be detected when folding qparams

to add the tosa_special_dtype meta.

Some additional changes are needed to make sure the meta survives

all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.

One conv2d test case was actually dw conv, so it was modified.
cc @freddan80@per@zingo@oscarandersson8218@digantdesai
@Erik-Lundell
Arm backend: Support a8w4 for convolution and linear.
7b6bc55
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't
have int4, the dtype is carried in an int8, quantized with
qmin=-7, qmax=7. This can then be detected when folding qparams
to add the tosa_special_dtype meta.
Some additional changes are needed to make sure the meta survives
all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.
One conv2d test case was actually dw conv, so it was modified.
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Iedcc45f2e419c261fd3205981fa632736c69524d
@Erik-Lundell
Arm backend: Fix test names
4d157fc
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Id0cd35dead7558346424bba9e7712b36e90f5429
@pytorch-bot
pytorch-botBot
commented
Jan 14, 2026•

edited

Loading

Copy link


Copy Markdown

🔗 Helpful Links
🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16577
Note: Links to docs will display an error until the docs builds have been completed.
❗ 1 Active SEVs
There are 1 currently active SEVs. If your PR is affected, please view them below:
❌ 1 New Failure, 1 Unrelated Failure
As of commit 4d157fc with merge base 9ba1b5d (image):
NEW FAILURE - The following job has failed:
UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:
This comment was automatically generated by Dr. CI and updates every 15 minutes.
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-LundellErik-Lundell
added

partner: arm
For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm
release notes: arm
Changes to the ARM backend delegate
ciflow/trunk

and removed

CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
labels
Jan 14, 2026
zingo
zingo
approved these changes
Jan 14, 2026
View reviewed changes
@zingozingo
left a comment


Copy link


Copy Markdown

Collaborator
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

OK to merge if/when all Arm backend and cortex-m tests passes!
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-Lundell
Erik-Lundell
merged commit a9d8230
into
pytorch:mainJan 14, 2026

306 of 321 checks passed

@Erik-Lundell
Erik-Lundell
deleted the

int4

branch
February 4, 2026 15:44
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

Reviewers

@zingozingozingo approved these changes
@digantdesaidigantdesaiAwaiting requested review from digantdesaidigantdesai is a code owner

Assignees


No one assigned


Labels

ciflow/trunkCLA SignedThis label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.partner: armFor backend delegation, kernels, demo, etc. from the 3rd-party partner, Armrelease notes: armChanges to the ARM backend delegate

Projects


None yet


Milestone


No milestone


Development

Successfully merging this pull request may close these issues.

2 participants

@Erik-Lundell@zingo

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Arm backend: Support a8w4 for convolution and linear. - #16577
Merged
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Jan 14, 2026
Merged
Arm backend: Support a8w4 for convolution and linear.#16577
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Conversation
@Erik-Lundell
@Erik-LundellErik-Lundell
commented
Jan 14, 2026•

edited by pytorch-bot
Bot
Loading

Copy link


Copy Markdown

Collaborator
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't

have int4, the dtype is carried in an int8, quantized with

qmin=-7, qmax=7. This can then be detected when folding qparams

to add the tosa_special_dtype meta.

Some additional changes are needed to make sure the meta survives

all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.

One conv2d test case was actually dw conv, so it was modified.
cc @freddan80@per@zingo@oscarandersson8218@digantdesai
@Erik-Lundell
Arm backend: Support a8w4 for convolution and linear.
7b6bc55
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't
have int4, the dtype is carried in an int8, quantized with
qmin=-7, qmax=7. This can then be detected when folding qparams
to add the tosa_special_dtype meta.
Some additional changes are needed to make sure the meta survives
all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.
One conv2d test case was actually dw conv, so it was modified.
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Iedcc45f2e419c261fd3205981fa632736c69524d
@Erik-Lundell
Arm backend: Fix test names
4d157fc
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Id0cd35dead7558346424bba9e7712b36e90f5429
@pytorch-bot
pytorch-botBot
commented
Jan 14, 2026•

edited

Loading

Copy link


Copy Markdown

🔗 Helpful Links
🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16577
Note: Links to docs will display an error until the docs builds have been completed.
❗ 1 Active SEVs
There are 1 currently active SEVs. If your PR is affected, please view them below:
❌ 1 New Failure, 1 Unrelated Failure
As of commit 4d157fc with merge base 9ba1b5d (image):
NEW FAILURE - The following job has failed:
UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:
This comment was automatically generated by Dr. CI and updates every 15 minutes.
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-LundellErik-Lundell
added

partner: arm
For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm
release notes: arm
Changes to the ARM backend delegate
ciflow/trunk

and removed

CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
labels
Jan 14, 2026
zingo
zingo
approved these changes
Jan 14, 2026
View reviewed changes
@zingozingo
left a comment


Copy link


Copy Markdown

Collaborator
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

OK to merge if/when all Arm backend and cortex-m tests passes!
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-Lundell
Erik-Lundell
merged commit a9d8230
into
pytorch:mainJan 14, 2026

306 of 321 checks passed

@Erik-Lundell
Erik-Lundell
deleted the

int4

branch
February 4, 2026 15:44
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

Reviewers

@zingozingozingo approved these changes
@digantdesaidigantdesaiAwaiting requested review from digantdesaidigantdesai is a code owner

Assignees


No one assigned


Labels

ciflow/trunkCLA SignedThis label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.partner: armFor backend delegation, kernels, demo, etc. from the 3rd-party partner, Armrelease notes: armChanges to the ARM backend delegate

Projects


None yet


Milestone


No milestone


Development

Successfully merging this pull request may close these issues.

2 participants

@Erik-Lundell@zingo

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Arm backend: Support a8w4 for convolution and linear. - #16577
Merged
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Jan 14, 2026
Merged
Arm backend: Support a8w4 for convolution and linear.#16577
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Conversation
@Erik-Lundell
@Erik-LundellErik-Lundell
commented
Jan 14, 2026•

edited by pytorch-bot
Bot
Loading

Copy link


Copy Markdown

Collaborator
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't

have int4, the dtype is carried in an int8, quantized with

qmin=-7, qmax=7. This can then be detected when folding qparams

to add the tosa_special_dtype meta.

Some additional changes are needed to make sure the meta survives

all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.

One conv2d test case was actually dw conv, so it was modified.
cc @freddan80@per@zingo@oscarandersson8218@digantdesai
@Erik-Lundell
Arm backend: Support a8w4 for convolution and linear.
7b6bc55
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't
have int4, the dtype is carried in an int8, quantized with
qmin=-7, qmax=7. This can then be detected when folding qparams
to add the tosa_special_dtype meta.
Some additional changes are needed to make sure the meta survives
all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.
One conv2d test case was actually dw conv, so it was modified.
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Iedcc45f2e419c261fd3205981fa632736c69524d
@Erik-Lundell
Arm backend: Fix test names
4d157fc
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Id0cd35dead7558346424bba9e7712b36e90f5429
@pytorch-bot
pytorch-botBot
commented
Jan 14, 2026•

edited

Loading

Copy link


Copy Markdown

🔗 Helpful Links
🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16577
Note: Links to docs will display an error until the docs builds have been completed.
❗ 1 Active SEVs
There are 1 currently active SEVs. If your PR is affected, please view them below:
❌ 1 New Failure, 1 Unrelated Failure
As of commit 4d157fc with merge base 9ba1b5d (image):
NEW FAILURE - The following job has failed:
UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:
This comment was automatically generated by Dr. CI and updates every 15 minutes.
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-LundellErik-Lundell
added

partner: arm
For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm
release notes: arm
Changes to the ARM backend delegate
ciflow/trunk

and removed

CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
labels
Jan 14, 2026
zingo
zingo
approved these changes
Jan 14, 2026
View reviewed changes
@zingozingo
left a comment


Copy link


Copy Markdown

Collaborator
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

OK to merge if/when all Arm backend and cortex-m tests passes!
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-Lundell
Erik-Lundell
merged commit a9d8230
into
pytorch:mainJan 14, 2026

306 of 321 checks passed

@Erik-Lundell
Erik-Lundell
deleted the

int4

branch
February 4, 2026 15:44
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

Reviewers

@zingozingozingo approved these changes
@digantdesaidigantdesaiAwaiting requested review from digantdesaidigantdesai is a code owner

Assignees


No one assigned


Labels

ciflow/trunkCLA SignedThis label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.partner: armFor backend delegation, kernels, demo, etc. from the 3rd-party partner, Armrelease notes: armChanges to the ARM backend delegate

Projects


None yet


Milestone


No milestone


Development

Successfully merging this pull request may close these issues.

2 participants

@Erik-Lundell@zingo

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
Arm backend: Support a8w4 for convolution and linear. - #16577
Merged
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Jan 14, 2026
Merged
Arm backend: Support a8w4 for convolution and linear.#16577
Erik-Lundell merged 2 commits into
pytorch:mainfrom 
Erik-Lundell:int4
Conversation
@Erik-Lundell
@Erik-LundellErik-Lundell
commented
Jan 14, 2026•

edited by pytorch-bot
Bot
Loading

Copy link


Copy Markdown

Collaborator
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't

have int4, the dtype is carried in an int8, quantized with

qmin=-7, qmax=7. This can then be detected when folding qparams

to add the tosa_special_dtype meta.

Some additional changes are needed to make sure the meta survives

all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.

One conv2d test case was actually dw conv, so it was modified.
cc @freddan80@per@zingo@oscarandersson8218@digantdesai
@Erik-Lundell
Arm backend: Support a8w4 for convolution and linear.
7b6bc55
Int4 is added as a TosaSpecialDtype. Since torch.dtype doesn't
have int4, the dtype is carried in an int8, quantized with
qmin=-7, qmax=7. This can then be detected when folding qparams
to add the tosa_special_dtype meta.
Some additional changes are needed to make sure the meta survives
all the way to TOSA.
Tests are added to conv2d, conv3d, depthwise conv, and linear.
One conv2d test case was actually dw conv, so it was modified.
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Iedcc45f2e419c261fd3205981fa632736c69524d
@Erik-Lundell
Arm backend: Fix test names
4d157fc
Signed-off-by: Erik Lundell <erik.lundell@arm.com>
Change-Id: Id0cd35dead7558346424bba9e7712b36e90f5429
@pytorch-bot
pytorch-botBot
commented
Jan 14, 2026•

edited

Loading

Copy link


Copy Markdown

🔗 Helpful Links
🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16577
Note: Links to docs will display an error until the docs builds have been completed.
❗ 1 Active SEVs
There are 1 currently active SEVs. If your PR is affected, please view them below:
❌ 1 New Failure, 1 Unrelated Failure
As of commit 4d157fc with merge base 9ba1b5d (image):
NEW FAILURE - The following job has failed:
UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:
This comment was automatically generated by Dr. CI and updates every 15 minutes.
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-LundellErik-Lundell
added

partner: arm
For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm
release notes: arm
Changes to the ARM backend delegate
ciflow/trunk

and removed

CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
labels
Jan 14, 2026
zingo
zingo
approved these changes
Jan 14, 2026
View reviewed changes
@zingozingo
left a comment


Copy link


Copy Markdown

Collaborator
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

OK to merge if/when all Arm backend and cortex-m tests passes!
@meta-clameta-claBot
added
the 
CLA Signed
This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.
label
Jan 14, 2026
@Erik-Lundell
Erik-Lundell
merged commit a9d8230
into
pytorch:mainJan 14, 2026

306 of 321 checks passed

@Erik-Lundell
Erik-Lundell
deleted the

int4

branch
February 4, 2026 15:44
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

Reviewers

@zingozingozingo approved these changes
@digantdesaidigantdesaiAwaiting requested review from digantdesaidigantdesai is a code owner

Assignees


No one assigned


Labels

ciflow/trunkCLA SignedThis label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed.partner: armFor backend delegation, kernels, demo, etc. from the 3rd-party partner, Armrelease notes: armChanges to the ARM backend delegate

Projects


None yet


Milestone


No milestone


Development

Successfully merging this pull request may close these issues.

2 participants

@Erik-Lundell@zingo