roundup_lwork - roundup_lwork: fix rounding integer to float

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Generated automatically by Doxygen for LAPACK from the source code. Version 3.12.0 Thu Aug 7 2025 17:26:25 roundup_lwork(3)

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Function Documentation

doubleprecisionfunctiondroundup_lwork(integerlwork)DROUNDUP_LWORKPurpose: DROUNDUP_LWORK deals with a subtle bug with returning LWORK as a Float. This routine guarantees it is rounded up instead of down by multiplying LWORK by 1+eps when it is necessary, where eps is the relative machine precision. E.g., float( 9007199254740993 ) == 9007199254740992 float( 9007199254740993 ) * (1.+eps) == 9007199254740994 \return DROUNDUP_LWORK \verbatim DROUNDUP_LWORK >= LWORK. DROUNDUP_LWORK is guaranteed to have zero decimal part. ParametersLWORK Workspace size. Author Weslley Pereira, University of Colorado Denver, USA FurtherDetails: This routine was inspired in the method `magma_zmake_lwork` from MAGMA. \see https://bitbucket.org/icl/magma/src/master/control/magma_zauxiliary.cpp realfunctionsroundup_lwork(integerlwork)SROUNDUP_LWORKPurpose: SROUNDUP_LWORK deals with a subtle bug with returning LWORK as a Float. This routine guarantees it is rounded up instead of down by multiplying LWORK by 1+eps when it is necessary, where eps is the relative machine precision. E.g., float( 16777217 ) == 16777216 float( 16777217 ) * (1.+eps) == 16777218 \return SROUNDUP_LWORK \verbatim SROUNDUP_LWORK >= LWORK. SROUNDUP_LWORK is guaranteed to have zero decimal part. ParametersLWORK Workspace size. Author Weslley Pereira, University of Colorado Denver, USA FurtherDetails: This routine was inspired in the method `magma_zmake_lwork` from MAGMA. \see https://bitbucket.org/icl/magma/src/master/control/magma_zauxiliary.cpp