This file is indexed.

/usr/include/atlas/atlas_zNCmm.h is in libatlas-dev 3.10.1-4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#ifndef ZMM_H
   #define ZMM_H

   #define ATL_mmMULADD
   #define ATL_mmLAT 1
   #define ATL_mmMU  6
   #define ATL_mmNU  1
   #define ATL_mmKU  52
   #define MB 36
   #define NB 36
   #define KB 36
   #define NBNB 1296
   #define MBNB 1296
   #define MBKB 1296
   #define NBKB 1296
   #define NB2 72
   #define NBNB2 2592

   #define ATL_MulByNB(N_) ((N_) * 36)
   #define ATL_DivByNB(N_) ((N_) / 36)
   #define ATL_MulByNBNB(N_) ((N_) * 1296)

#endif