Fix: Handle underflow properly at subnormal/normal boundary (!157) · Merge requests · OpenHW Group / backup-20251026 / cvfpu

Placeholder Ihsane Tahir requested to merge github/fork/IhsaneTahir/thmulti_div_uf into develop Aug 29, 2025

This PR offers a patch for T-Head openc910 DivSqrt unit instantiated in THMULTI.

It fixes the handling of the underflow exception in the case where the result of the division, as though the exponent range were unbounded, lies strictly between ±b^emin. Even if the rounded result is exactly ±b^emin.

It resolves issue #155

Fix: Handle underflow properly at subnormal/normal boundary

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