gelsy: fix ILAENV workspace query routines for TZRZF/UNMRZ#1289
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gelsy: fix ILAENV workspace query routines for TZRZF/UNMRZ#1289jschueller wants to merge 1 commit into
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The workspace NB queries in all four ?gelsy variants used ?GERQF and ?UNMRQ, but the routines actually called at runtime are ?TZRZF and ?UNMRZ (real) / ?UNMRZ (complex). While ?GERQF and ?TZRZF are related (both produce an RQ-like factorization), their block sizes may differ in ILAENV's tuned values. If the user relied on LWKOPT from the query to allocate exactly the right workspace, the actual ?TZRZF/?UNMRZ calls could underflow or overflow the work array. Fix the ILAENV calls to match the routines actually invoked: ?GERQF -> ?TZRZF ?UNMRQ -> ?UNMRZ Closes Reference-LAPACK#676
martin-frbg
approved these changes
Jun 11, 2026
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The workspace NB queries in all four ?gelsy variants used ?GERQF and ?UNMRQ, but the routines actually called at runtime are ?TZRZF and ?UNMRZ (real) / ?UNMRZ (complex).
While ?GERQF and ?TZRZF are related (both produce an RQ-like factorization), their block sizes may differ in ILAENV's tuned values. If the user relied on LWKOPT from the query to allocate exactly the right workspace, the actual ?TZRZF/?UNMRZ calls could underflow or overflow the work array.
Fix the ILAENV calls to match the routines actually invoked:
?GERQF -> ?TZRZF
?UNMRQ -> ?UNMRZ
Closes #676