| \ tag: pseudo r-stack implementation for openbios |
| \ |
| \ Copyright (C) 2016 Mark Cave-Ayland |
| \ |
| \ See the file "COPYING" for further information about |
| \ the copyright and warranty status of this work. |
| \ |
| |
| \ |
| \ Pseudo r-stack implementation for interpret mode |
| \ |
| |
| create prstack h# 20 cells allot |
| variable #prstack 0 #prstack ! |
| |
| : prstack-push prstack #prstack @ cells + ! 1 #prstack +! ; |
| : prstack-pop -1 #prstack +! prstack #prstack @ cells + @ ; |
| |
| : >r state @ if ['] >r , exit then r> swap prstack-push >r ; immediate |
| : r> state @ if ['] r> , exit then r> prstack-pop swap >r ; immediate |
| : r@ state @ if ['] r@ , exit then r> prstack-pop dup prstack-push swap >r ; immediate |
