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Annotation of gforth/cache1.vmg, revision 1.2

1.1       anton       1: \ stack cache setup
                      2: 
                      3: \ Copyright (C) 2003 Free Software Foundation, Inc.
                      4: 
                      5: \ This file is part of Gforth.
                      6: 
                      7: \ Gforth is free software; you can redistribute it and/or
                      8: \ modify it under the terms of the GNU General Public License
                      9: \ as published by the Free Software Foundation; either version 2
                     10: \ of the License, or (at your option) any later version.
                     11: 
                     12: \ This program is distributed in the hope that it will be useful,
                     13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: \ GNU General Public License for more details.
                     16: 
                     17: \ You should have received a copy of the GNU General Public License
                     18: \ along with this program; if not, write to the Free Software
                     19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
                     20: 
                     21: \E register IPTOS Cell
1.2     ! anton      22: \E register spTOS Cell
        !            23: \  \E register spb Cell
        !            24: \  \E register spc Cell
        !            25: \  \E register spd Cell
1.1       anton      26: 
                     27: \E create IPregs IPTOS ,
1.2     ! anton      28: \ \E create regs spc , spb , spTOS ,
        !            29: \E create regs spTOS ,
1.1       anton      30: 
                     31: \E IPregs 1 0 stack-state IPss1
1.2     ! anton      32: \ \E regs 3 cells + 0  -1 stack-state ss0
        !            33: \ \E regs 2 cells + 1  0 stack-state ss1
        !            34: \ \E regs 1 cells + 2  1 stack-state ss2
        !            35: \ \E regs 0 cells + 3  2 stack-state ss3
        !            36: \E regs 1  0 stack-state ss1
1.1       anton      37: 
1.2     ! anton      38: \ the first of these is the default state (for now)
        !            39: \ \E state S0
1.1       anton      40: \E state S1
1.2     ! anton      41: \ \E state S2
        !            42: \ \E state S3
1.1       anton      43: 
1.2     ! anton      44: \  \E ss0 data-stack S0 set-ss
1.1       anton      45: \E ss1 data-stack S1 set-ss
1.2     ! anton      46: \  \E ss2 data-stack S2 set-ss
        !            47: \  \E ss3 data-stack S3 set-ss
1.1       anton      48: 
1.2     ! anton      49: \  \E IPss1 inst-stream S0 set-ss
1.1       anton      50: \E IPss1 inst-stream S1 set-ss
1.2     ! anton      51: \  \E IPss1 inst-stream S2 set-ss
        !            52: \  \E IPss1 inst-stream S3 set-ss
1.1       anton      53: 
                     54: \E data-stack to cache-stack
1.2     ! anton      55: \  \E here 4 cache-states 2! s0 , s1 , s2 , s3 ,
        !            56: \E here 1 cache-states 2! s1 ,
1.1       anton      57: 
                     58: \ !! the following should be automatic
1.2     ! anton      59: \E S1 to state-default
1.1       anton      60: \E state-default to state-in
                     61: \E state-default to state-out