Arm backend: Add bfloat16 support to VGF backend.

[Erik-Lundell]

• Add bf16 extension to Vgf testing pipline
• Handle bf16 in VGFSetup.sh
• Needs bumping of Vulkan SDK to 1.4.350.0 to include VK_FORMAT_R16_SFLOAT_FPENCODING_BFLOAT16_ARM

Initially tested with a single operator test of matmul.

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218 @mansnils @Sebastian-Larsson @robell @rascani

[pytorch-bot]

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• [ROCm] MI350 CI jobs will have longer queue times due to CI migration

❌ 4 New Failures, 5 Unrelated Failures

As of commit cf8b909 with merge base 2e328aa ():

NEW FAILURES - The following jobs have failed:

• pull / unittest / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 54523f659f8344fb019600a66f651488797feaf37c2f475e40991a0ba0447fa8 /exec failed with exit code 1
• pull / unittest-editable / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 6c1ad6233c4999610022fac717092c31837d3cd84d4374b8529496415ae8c130 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_pytest_ops_ethos_u85) / linux-job (gh)
  RuntimeError: Command docker exec -t 2743b2613156b9a32ebf746e135a3a67939b02c363eb79d1bfe6da5f6e700cd5 /exec failed with exit code 1
• trunk / unittest-release / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 55bff880ab34b64b0f5026e605275d3470e7c7248b2705b79096341708e6a88b /exec failed with exit code 1

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh) (trunk failure)
• pull / unittest / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / unittest-editable / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh) (trunk failure)
• trunk / unittest-release / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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

[volkkov]

Good improvement overall. One edge case: empty string vs null aren't treated the same downstream — might need a normalization step.

[Erik-Lundell]

Good improvement overall. One edge case: empty string vs null aren't treated the same downstream — might need a normalization step.

Thanks for the comment volkkov, could you please be a bit more specific? I.e. which string

[digantdesai]

LGTM, I will let @SS-JIA stamp it due to the submodule update.