Such a beautiful technique for shoehorning straight out of the 1970s! See also

https://en.wikipedia.org/wiki/CHIP-8

and

https://en.wikipedia.org/wiki/SWEET16

It seems so un-FORTRAN that DEC had a FORTRAN compiler for the PDP-11. that was based on a stack machine and then later built an FP accelerator specialized to accelerate the stack machine. It was a straggler but I'm still trying to track down a circa 1992 article from Dr. Dobb's Journal where someone used virtual machine techniques to unbreak the broken i860 and make a good FORTRAN compiler.