/usr/include/clc/integer/sub_sat.inc is in libclc-dev 0~git20140101-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | _CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE sub_sat(__CLC_GENTYPE x, __CLC_GENTYPE y);
|