https://gcc.gnu.org/onlinedocs/gfortran/ISHFT.html
ISHFT (The GNU Fortran Compiler)
ISHFT (The GNU Fortran Compiler)
gnufortrancompiler
https://www.intel.com/content/www/us/en/docs/fortran-compiler/developer-guide-reference/2025-2/ishft.html
ISHFT
Elemental Intrinsic Function (Generic): Performs a logical shift.