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[gforth] /
gforth /
cache1.vmg
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1.2:
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Mon Nov 3 20:13:35 2003 UTC (20 years, 5 months ago) by
anton
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made classical 1-register stack caching work again (and probably
general stack caching with non-empty canonical state). There was a
subtle bug involving ?DUP-?BRANCH.
made this the default for gforth-fast and turned off anything beyond
deleted the now-unused rewrite_bb().
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
22: \E register spTOS Cell
23: \ \E register spb Cell
24: \ \E register spc Cell
25: \ \E register spd Cell
26:
27: \E create IPregs IPTOS ,
28: \ \E create regs spc , spb , spTOS ,
29: \E create regs spTOS ,
30:
31: \E IPregs 1 0 stack-state IPss1
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
37:
38: \ the first of these is the default state (for now)
39: \ \E state S0
40: \E state S1
41: \ \E state S2
42: \ \E state S3
43:
44: \ \E ss0 data-stack S0 set-ss
45: \E ss1 data-stack S1 set-ss
46: \ \E ss2 data-stack S2 set-ss
47: \ \E ss3 data-stack S3 set-ss
48:
49: \ \E IPss1 inst-stream S0 set-ss
50: \E IPss1 inst-stream S1 set-ss
51: \ \E IPss1 inst-stream S2 set-ss
52: \ \E IPss1 inst-stream S3 set-ss
53:
54: \E data-stack to cache-stack
55: \ \E here 4 cache-states 2! s0 , s1 , s2 , s3 ,
56: \E here 1 cache-states 2! s1 ,
57:
58: \ !! the following should be automatic
59: \E S1 to state-default
60: \E state-default to state-in
61: \E state-default to state-out
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