Find a binary value with CL (V5R4)

Folks:

I am working on a project where I have to determine if a file is a source file or physical file. The problem is it will be too slow to call DSPFD to an outfile and read it for each of the files that will be looked at. So I was trying to use the API QDBRTVFD which is perfect for the problem, except: The data structure IBM used for the attributes is a 16 _BIT_ field. (Maybe Bruce can explain the logic behind that choice)

Dec Hex Bit Type Field Description
0 0 BINARY(4) Qdbfyret Length of the data returned in bytes.
4 4 BINARY(4) Qdbfyavl Number of bytes provided for the file definition data.
8 8 BIT(16) Qdbfhflg Attributes bytes.
8 8 0 BIT(2) Reserved_1 Reserved.
8 8 2 BIT(1) Qdbfhfpl Type of file.
8 8 3 BIT(1) Reserved_2 Reserved.
8 8 4 BIT(1) Qdbfhfsu File type (FILETYPE). If on, *SRC If off *DATA
8 8 5 BIT(1) Reserved_3 Reserved.
8 8 6 BIT(1) Qdbfhfky Access path.
8 8 7 BIT(1) Reserved_4 Reserved.
9 9 0 BIT(1) Qdbfhflc Record format level check (LVLCHK).
9 9 1 BIT(1) Qdbfkfso Select/omit.
9 9 2 BIT(4) Reserved_5 Reserved.
9 9 6 BIT(1) Qdbfigcd Double-byte character Graphic data.
9 9 7 BIT(1) Qdbfigcl

Constraints: Must use CL and must work at V5R4.

Any ideas how to get after that fifth bit?