cache0.vmg

\ stack cache setup

\ Author: Anton Ertl
\ Copyright (C) 2003,2007,2019 Free Software Foundation, Inc.

\ This file is part of Gforth.

\ Gforth is free software; you can redistribute it and/or
\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation, either version 3
\ of the License, or (at your option) any later version.

\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
\ GNU General Public License for more details.

\ You should have received a copy of the GNU General Public License
\ along with this program. If not, see http://www.gnu.org/licenses/.

\E register IPTOS Cell
\E register spa Cell
\E register spb Cell
\E register spc Cell
\E register spd Cell

\E create IPregs IPTOS ,
\E create regs spc , spb , spa ,

\E IPregs 1 0 stack-state IPss1
\E regs 3 th 0  0 stack-state ss0
\E regs 2 th 1  0 stack-state ss1
\E regs 1 th 2  1 stack-state ss2
\E regs 0 th 3  2 stack-state ss3

\ the first of these is the default state
\E state S0
\E state S1
\E state S2
\E state S3

\E ss0 data-stack S0 set-ss
\E ss1 data-stack S1 set-ss
\E ss2 data-stack S2 set-ss
\E ss3 data-stack S3 set-ss

\E IPss1 inst-stream S0 set-ss
\E IPss1 inst-stream S1 set-ss
\E IPss1 inst-stream S2 set-ss
\E IPss1 inst-stream S3 set-ss

\E data-stack to cache-stack
\E here 4 cache-states 2! s0 , s1 , s2 , s3 ,

\ !! the following should be automatic
\E S0 to state-default
\E state-default to state-in
\E state-default to state-out