Skip to content

[rocjitsu] Fix gfx950 decoder extension handling - #10204

Merged
kuhar merged 1 commit into
developfrom
users/kuhar/gfx950-decoder-fixes
Aug 18, 2026
Merged

kuhar merged 1 commit into
developfrom
users/kuhar/gfx950-decoder-fixes

Conversation

@kuhar

@kuhar kuhar commented Aug 16, 2026 •

Copy link
Copy Markdown
Member

These were found by the fuzzer added in #9912.

  • validate CDNA4 VOP3PX2 suffix pairs before constructing combined instructions
  • size literal and compact modifier extensions from the selected opcode and operand capabilities
  • render SDWA source and destination modifiers from extension words and reject invalid selector combinations

Copilot AI lite review requested due to automatic review settings August 16, 2026 00:46
@kuhar
kuhar requested review from a team and atgutier as code owners August 16, 2026 00:46

Copilot AI left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

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

Copilot wasn't able to review this pull request because it exceeds the maximum number of lines (20,000). Try reducing the number of changed lines and requesting a review from Copilot again.

@therock-pr-bot

therock-pr-bot Bot commented Aug 16, 2026 •

Copy link
Copy Markdown

❌ PR Check — Action Required

Check Status Details
📝 PR Description ❌ Fail Error: PR description must reference a JIRA ID, ISSUE ID, or a GitHub closing keyword.
Expected: include a JIRA ID / ISSUE ID line (separator : or -, or omitted; value may be a JIRA key, a number with/without #, or a link), OR a closing keyword + issue reference. Accepted examples:
• JIRA ID : TESTAUTO-6039
• JIRA ID - #330
• JIRA ID #330
• JIRA ID (on separate line)
ROCM-25757
• ISSUE ID : TESTUTO-3334
• ISSUE ID #3334
• ISSUE ID - TESTAUTO-3433
• ISSUE ID (on separate line)
AIRUNTIME-2352
• ISSUE ID : https://github.com/<org_name>/<repo_name>/issues/1234
• Closes #10
• Fixes octo-org/octo-repo#100
• Resolves: #123
• #123
• https://github.com/<org_name>/<repo_name>/issues/123
Current: no valid JIRA/ISSUE/closing-keyword reference found
⛔ Forbidden Files ✅ Pass —
🧪 Unit Test ✅ Pass —
🔎 pre-commit ✅ Pass —
🚫 Draft PR 🔜 To Be Enabled —
🚩 Feature Flag 🔜 To Be Enabled —
📊 Code Coverage 🔜 To Be Enabled —

⚠️ 1 policy check(s) failed. Please address the issues above before this PR can be Reviewed.

🚫 Please fix the failed policies

  • ❌ PR Description

The Not ready to Review label was added to this PR. Once all policies pass, the label is removed automatically.

📖 Need help? See the Policy FAQ for details on every check and how to fix failures.

🙋 Wish to Override Policy?

@therock-pr-bot

Copy link
Copy Markdown

🚫 Please fix the failed policies before requesting reviews.

The following policy checks failed:

  • ❌ PR Description

The Not ready to Review label has been added to this PR.
Once all policies pass, the label will be removed automatically.

@atgutier atgutier left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

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

LGTM

Validate CDNA4 VOP3PX2 suffix pairs before constructing a combined instruction, render SDWA modifiers from extension words, and size literal and compact modifier extensions from decoded opcode and operand capabilities.

Keep the source-modifier format with the lightweight instruction-encoding interface, include generated opcode definitions directly, and reject invalid branch selectors. Regenerate affected AMDGPU sources and add focused generator, decoder, sizing, and SDWA coverage.
@kuhar
kuhar force-pushed the users/kuhar/gfx950-decoder-fixes branch from 7f9f259 to d9620c1 Compare August 18, 2026 16:49
@kuhar
kuhar merged commit 60c29ef into develop Aug 18, 2026
28 of 29 checks passed
@kuhar
kuhar deleted the users/kuhar/gfx950-decoder-fixes branch August 18, 2026 17:38
atgutier pushed a commit that referenced this pull request Aug 19, 2026
These were found by the fuzzer added in
#9912.

- validate CDNA4 VOP3PX2 suffix pairs before constructing combined
instructions
- size literal and compact modifier extensions from the selected opcode
and operand capabilities
- render SDWA source and destination modifiers from extension words and
reject invalid selector combinations

(cherry picked from commit 60c29ef)
atgutier added a commit that referenced this pull request Aug 20, 2026
…t calls (#10444)

## Motivation

hipTensor and rocThrust gfx1250 objects are refused at code-object load
time with "indirect branch or call target recovery is not implemented
for relocated kernel text" on `s_swap_pc_i64`. A refused object leaves
HIP holding an invalid kernel
handle, so the failure surfaces as a segfault rather than a diagnostic.
The fix is upstream as #10376; this backports it to
`release/bkc/therock-10.1-20260811`.

## Commits Cherry-Picked

  | # | Upstream | PR | Backport | Subject |
  |---|----------|-----|----------|---------|
| 1 | `b6d838028e` | #10197 | `846fb16d12` | [rocjitsu][docs] Refresh
architecture support documentation |
| 2 | `5c8e33e391` | #10200 | `db5c58b1be` | [rocjitsu] Define
standalone decoder ownership |
| 3 | `be1f91998f` | #10199 | `ed102baf1c` | [rocjitsu] Apply async
IOFFSET to LDS addresses |
| 4 | `fda635e5b4` | — | `ad32ff7c18` | [rocjitsu] Extract per-scope
rollback and object-level checks from translate() |
| 5 | `8f75eb781e` | — | `4c0cb05207` | [rocjitsu] Emit leading V_NOPs
ahead of a gfx1250 MODE write |
| 6 | `00aa1e260f` | #9941 | `ded43b1787` | fix(rocjitsu): disable
zero-count TDM descriptors |
| 7 | `c810647609` | #10192 | `50ca7f1732` | [rocjitsu] Apply MUBUF
LDS-load instruction offset to the LDS address |
| 8 | `1d7866269d` | #9560 | `2e6bf26943` | [rocjitsu] code rewrite
condition validator |
| 9 | `95b6c410bb` | #10175 | `8418901076` | [rocjitsu] Fix
ds_read_b64_tr_b16 lane layout in gfx950 simulator |
| 10 | `bfaebcfb5c` | #10240 | `c4eac1e1f7` | [rocjitsu][util] Add
result and diagnostic utilities |
| 11 | `dbb7221fa7` | #9775 | `cdd0993a5f` | fix(rocjitsu): route tensor
DMA through wave VMID |
| 12 | `2779247222` | #9779 | `7bfeba6f5d` | feat(rocjitsu): Lazy vgpr
allocation system |
| 13 | `a659172a31` | #9936 | `180cf00325` | fix(rocjitsu): honor TDM
tensor bounds across iterations |
| 14 | `60c29efb39` | #10204 | `370bfb9796` | [rocjitsu] Fix gfx950
decoder extension handling |
| 15 | `c1dba564e7` | #10345 | `536110a083` | [rocjitsu] Model gfx1250
wave ABI state |
| 16 | `7f71be9f32` | #10346 | `3f922ad5f2` | [rocjitsu] Model gfx1250
barrier synchronization |
| 17 | `bea7ac8937` | #10368 | `7b5ecf6c7b` | [rocjitsu] Replace decoder
exceptions with results |
| 18 | `f2e878694e` | #10371 | `8cf750d23f` | [rocjitsu] Dispatch
operand validation by type |
| 19 | `dd619bed77` | #9735 | `1a612c47c0` | fix(rocjitsu): respect
same-wave LDS ordering |
| 20 | `c5fae8d2b2` | #10137 | `4360c4b978` | [rocjitsu] Rename gfx1250
to cdna5 for enums, configs, amdisa codegen helpers and generated
symbols. (NFC) |
| 21 | `b05a587f89` | #10274 | `bfb5f9fab0` | [rocjitsu] Align CDNA4
MI350X configs with captured topology |
| 22 | `f81f9d40db` | #10362 | `8177b5725c` | feat(rocjitsu): cdna5 OOB
behavior implementation |
| 23 | `53a939bd00` | #10283 | `141b109432` | [rocjitsu] add per-XCD
workgroup dispatch observability |
| 24 | `a0fb11bc17` | #10414 | `6bb4c5a959` | [rocjitsu] Refactor test
encoding handling in execution tests (NFC) |
| 25 | `e5109e315e` | #9844 | `322ac26b44` | feat(emulation): debug
emulated GPU kernels with real ROCgdb |
| 26 | `efa24f23c9` | — | `c3c9641073` | rocjitsu: Point the XCD
distribution test at the config that exists |
| 27 | `8b7763ef5e` | #10376 | `c3f419555a` | [rocjitsu] Translate
gfx1250 lane-banked and kernarg-supplied indirect calls |

## Issue Tracking

[ROCM-29436]

## Submission Checklist

- [x] Look over the contributing guidelines at
https://github.com/ROCm/rocm-systems/blob/develop/CONTRIBUTING.md.


[ROCM-29346]:
https://amd-hub.atlassian.net/browse/ROCM-29346?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

[ROCM-29436]:
https://amd-hub.atlassian.net/browse/ROCM-29436?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

---------

Signed-off-by: Tony Gutierrez <anthony.gutierrez@amd.com>
Signed-off-by: hanhanW <hanhan0912@gmail.com>
Co-authored-by: Jakub Kuderski <jakub@nod-labs.com>
Co-authored-by: James Newling <james.newling@gmail.com>
Co-authored-by: Fei Kou <feikou@meta.com>
Co-authored-by: Austin Lu <austin.lu@amd.com>
Co-authored-by: Fei Kou <feikou@anthropic.com>
Co-authored-by: Erick Ochoa Lopez <eochoalo@amd.com>
Co-authored-by: Han-Chung Wang <hanhan0912@gmail.com>
Co-authored-by: Rosa, Ada <arosa@amd.com>
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Projects

None yet

Development

Successfully merging this pull request may close these issues.

3 participants