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fix(vpto): support low-precision vbitcast - #1214

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Zhendong404 wants to merge 2 commits into
hw-native-sys:mainfrom
Zhendong404:codex/issue-1192
Closed

fix(vpto): support low-precision vbitcast#1214
Zhendong404 wants to merge 2 commits into
hw-native-sys:mainfrom
Zhendong404:codex/issue-1192

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Summary

  • Reuse PTO storage-width accounting in pto.vbitcast verification.
  • Allow packed FP4 vregs to be bitcast to byte-sized integer vregs when total storage width matches.
  • Add VPTO IR and LLVM emission regression coverage for f4E2M1x2/f4E1M2x2 to ui8.

Validation

Closes #1192

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Zhendong404 marked this pull request as ready for review August 11, 2026 04:59
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主线已包含此修复

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[Bug] vbitcast does not support sub-byte vreg types (f4e2m1x2 → ui8)

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