lapack_lu_factor_f32

void lapack_lu_factor_f32(const float * A, int n, float * LU_out, int * ipiv_out, int * info)

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Single-precision LU factorisation (packed format).

Writes the LAPACK-native packed LU output (lower triangle = $L$ without its unit diagonal, upper triangle = $U$ ) into LU_out, along with the pivot indices into ipiv_out. Intended for use with lapack_lu_solve_f32 so the factorisation can be reused across many right-hand sides.

References

LAPACK sgetrf_.

Parameters

Aconst float*

Row-major

n \times n

input.

nint

Side length.

LU_outfloat*

Packed LU output (row-major).

ipiv_outint*

1-based pivot indices, length

n

infoint*

LAPACK status word.