File:  [gforth] / gforth / cross.fs
Revision 1.88: download - view: text, annotated - select for diffs
Sun Oct 29 20:27:02 2000 UTC (18 years, 10 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Added new input handling (OO approach). Only available if capability
new-input is true (so setting that to false in machpc.fs gets you the old
input handling back).

\ CROSS.FS     The Cross-Compiler                      06oct92py
\ Idea and implementation: Bernd Paysan (py)

\ Copyright (C) 1995,1996,1997,1998,1999,2000 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 2
\ 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, write to the Free Software
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.

0 
[IF]

ToDo:
Crossdoc destination ./doc/crossdoc.fd makes no sense when
cross.fs is uses seperately. jaw
Do we need this char translation with >address and in branchoffset? 
(>body also affected) jaw
Clean up mark> and >resolve stuff jaw

[THEN]

hex

\ debugging for compiling

\ print stack at each colon definition
\ : : save-input cr bl word count type restore-input throw .s : ;

\ print stack at each created word
\ : create save-input cr bl word count type restore-input throw .s create ;


\ \ -------------  Setup Vocabularies

\ Remark: Vocabulary is not ANS, but it should work...

Vocabulary Cross
Vocabulary Target
Vocabulary Ghosts
Vocabulary Minimal
only Forth also Target also also
definitions Forth

: T  previous Ghosts also Target ; immediate
: G  Ghosts ; immediate
: H  previous Forth also Cross ; immediate

forth definitions

: T  previous Ghosts also Target ; immediate
: G  Ghosts ; immediate

: >cross  also Cross definitions previous ;
: >target also Target definitions previous ;
: >minimal also Minimal definitions previous ;

H

>CROSS

\ find out whether we are compiling with gforth

: defined? bl word find nip ;
defined? emit-file defined? toupper and \ drop 0
[IF]
\ use this in a gforth system
: \GFORTH ; immediate
: \ANSI postpone \ ; immediate
[ELSE]
: \GFORTH postpone \ ; immediate
: \ANSI ; immediate
[THEN]

\ANSI : [IFUNDEF] defined? 0= postpone [IF] ; immediate
\ANSI : [IFDEF] defined? postpone [IF] ; immediate
0 \ANSI drop 1
[IF]
: \G postpone \ ; immediate
: rdrop postpone r> postpone drop ; immediate
: name bl word count ;
: bounds over + swap ;
: scan >r BEGIN dup WHILE over c@ r@ <> WHILE 1 /string REPEAT THEN rdrop ;
: linked here over @ , swap ! ;
: alias create , DOES> @ EXECUTE ;
: defer ['] noop alias ;
: is state @ 
  IF ' >body postpone literal postpone ! 
  ELSE ' >body ! THEN ; immediate
: 0>= 0< 0= ;
: d<> rot <> -rot <> or ;
: toupper dup [char] a [char] z 1+ within IF [char] A [char] a - + THEN ;
Variable ebuf
: emit-file ( c fd -- ior ) swap ebuf c! ebuf 1 chars rot write-file ;
0a Constant #lf
0d Constant #cr

[IFUNDEF] Warnings Variable Warnings [THEN]

\ \ Number parsing					23feb93py

\ number? number                                       23feb93py

Variable dpl

hex
Create bases   10 ,   2 ,   A , 100 ,
\              16     2    10   character

\ !! protect BASE saving wrapper against exceptions
: getbase ( addr u -- addr' u' )
    over c@ [char] $ - dup 4 u<
    IF
	cells bases + @ base ! 1 /string
    ELSE
	drop
    THEN ;

: sign? ( addr u -- addr u flag )
    over c@ [char] - =  dup >r
    IF
	1 /string
    THEN
    r> ;

: s>unumber? ( addr u -- ud flag )
    over [char] ' =
    IF 	\ a ' alone is rather unusual :-)
	drop char+ c@ 0 true EXIT 
    THEN
    base @ >r  dpl on  getbase
    0. 2swap
    BEGIN ( d addr len )
	dup >r >number dup
    WHILE \ there are characters left
	dup r> -
    WHILE \ the last >number parsed something
	dup 1- dpl ! over c@ [char] . =
    WHILE \ the current char is '.'
	1 /string
    REPEAT  THEN \ there are unparseable characters left
	2drop false
    ELSE
	rdrop 2drop true
    THEN
    r> base ! ;

\ ouch, this is complicated; there must be a simpler way - anton
: s>number? ( addr len -- d f )
    \ converts string addr len into d, flag indicates success
    sign? >r
    s>unumber?
    0= IF
        rdrop false
    ELSE \ no characters left, all ok
	r>
	IF
	    dnegate
	THEN
	true
    THEN ;

: s>number ( addr len -- d )
    \ don't use this, there is no way to tell success
    s>number? drop ;

: snumber? ( c-addr u -- 0 / n -1 / d 0> )
    s>number? 0=
    IF
	2drop false  EXIT
    THEN
    dpl @ dup 0< IF
	nip
    ELSE
	1+
    THEN ;

: number? ( string -- string 0 / n -1 / d 0> )
    dup >r count snumber? dup if
	rdrop
    else
	r> swap
    then ;

: number ( string -- d )
    number? ?dup 0= abort" ?"  0<
    IF
	s>d
    THEN ;

[THEN]

hex     \ the defualt base for the cross-compiler is hex !!
\ Warnings off

\ words that are generaly useful

: KB  400 * ;
: >wordlist ( vocabulary-xt -- wordlist-struct )
  also execute get-order swap >r 1- set-order r> ;

: umax 2dup u< IF swap THEN drop ;
: umin 2dup u> IF swap THEN drop ;

: string, ( c-addr u -- )
    \ puts down string as cstring
    dup c, here swap chars dup allot move ;

: ," [char] " parse string, ;

: SetValue ( n -- <name> )
\G Same behaviour as "Value" if the <name> is not defined
\G Same behaviour as "to" if <name> is defined
\G SetValue searches in the current vocabulary
  save-input bl word >r restore-input throw r> count
  get-current search-wordlist
  IF	drop >r
	\ we have to set current to be topmost context wordlist
	get-order get-order get-current swap 1+ set-order
	r> ['] to execute
	set-order
  ELSE Value THEN ;

: DefaultValue ( n -- <name> )
\G Same behaviour as "Value" if the <name> is not defined
\G DefaultValue searches in the current vocabulary
 save-input bl word >r restore-input throw r> count
 get-current search-wordlist
 IF bl word drop 2drop ELSE Value THEN ;

hex

\ 1 Constant Cross-Flag	\ to check whether assembler compiler plug-ins are
			\ for cross-compiling
\ No! we use "[IFUNDEF]" there to find out whether we are target compiling!!!

: comment? ( c-addr u -- c-addr u )
        2dup s" (" compare 0=
        IF    postpone (
        ELSE  2dup s" \" compare 0= IF postpone \ THEN
        THEN ;

\ Begin CROSS COMPILER:

\ debugging

0 [IF]

This implements debugflags for the cross compiler and the compiled
images. It works identical to the has-flags in the environment.
The debugflags are defined in a vocabluary. If the word exists and
its value is true, the flag is switched on.

[THEN]

>CROSS

Vocabulary debugflags	\ debug flags for cross
also debugflags get-order over
Constant debugflags-wl
set-order previous

: DebugFlag
  get-current >r debugflags-wl set-current
  SetValue
  r> set-current ;

: Debug? ( adr u -- flag )
\G return true if debug flag is defined or switched on
  debugflags-wl search-wordlist
  IF EXECUTE
  ELSE false THEN ;

: D? ( <name> -- flag )
\G return true if debug flag is defined or switched on
\G while compiling we do not return the current value but
  bl word count debug? ;

: [d?]
\G compile the value-xt so the debug flag can be switched
\G the flag must exist!
  bl word count debugflags-wl search-wordlist
  IF 	compile,
  ELSE  -1 ABORT" unknown debug flag"
	\ POSTPONE false 
  THEN ; immediate

\ \ --------------------	source file

decimal

Variable cross-file-list
0 cross-file-list !
Variable target-file-list
0 target-file-list !
Variable host-file-list
0 host-file-list !

cross-file-list Value file-list
0 Value source-desc

\ file loading

: >fl-id   1 cells + ;
: >fl-name 2 cells + ;

Variable filelist 0 filelist !
Create NoFile ," #load-file#"

: loadfile ( -- adr )
  source-desc ?dup IF >fl-name ELSE NoFile THEN ;

: sourcefilename ( -- adr len ) 
  loadfile count ;

\ANSI : sourceline# 0 ;

\ \ --------------------	path handling from kernel/paths.fs

\ paths.fs path file handling                                    03may97jaw

\ -Changing the search-path:
\ fpath+ <path> 	adds a directory to the searchpath
\ fpath= <path>|<path>	makes complete now searchpath
\ 			seperator is |
\ .fpath		displays the search path
\ remark I: 
\ a ./ in the beginning of filename is expanded to the directory the
\ current file comes from. ./ can also be included in the search-path!
\ ~+/ loads from the current working directory

\ remark II:
\ if there is no sufficient space for the search path increase it!


\ -Creating custom paths:

\ It is possible to use the search mechanism on yourself.

\ Make a buffer for the path:
\ create mypath	100 chars , 	\ maximum length (is checked)
\ 		0 ,		\ real len
\ 		100 chars allot \ space for path
\ use the same functions as above with:
\ mypath path+ 
\ mypath path=
\ mypath .path

\ do a open with the search path:
\ open-path-file ( adr len path -- fd adr len ior )
\ the file is opened read-only; if the file is not found an error is generated

\ questions to: wilke@jwdt.com

[IFUNDEF] +place
: +place ( adr len adr )
        2dup >r >r
        dup c@ char+ + swap move
        r> r> dup c@ rot + swap c! ;
[THEN]

[IFUNDEF] place
: place ( c-addr1 u c-addr2 )
        2dup c! char+ swap move ;
[THEN]

\ if we have path handling, use this and the setup of it
[IFUNDEF] open-fpath-file

create sourcepath 1024 chars , 0 , 1024 chars allot \ !! make this dynamic
sourcepath value fpath

: also-path ( adr len path^ -- )
  >r
  \ len check
  r@ cell+ @ over + r@ @ u> ABORT" path buffer too small!"
  \ copy into
  tuck r@ cell+ dup @ cell+ + swap cmove
  \ make delimiter
  0 r@ cell+ dup @ cell+ + 2 pick + c! 1 + r> cell+ +!
  ;

: only-path ( adr len path^ -- )
  dup 0 swap cell+ ! also-path ;

: path+ ( path-addr  "dir" -- ) \ gforth
    \G Add the directory @var{dir} to the search path @var{path-addr}.
    name rot also-path ;

: fpath+ ( "dir" ) \ gforth
    \G Add directory @var{dir} to the Forth search path.
    fpath path+ ;

: path= ( path-addr "dir1|dir2|dir3" ) \ gforth
    \G Make a complete new search path; the path separator is |.
    name 2dup bounds ?DO i c@ [char] | = IF 0 i c! THEN LOOP
    rot only-path ;

: fpath= ( "dir1|dir2|dir3" ) \ gforth
    \G Make a complete new Forth search path; the path separator is |.
    fpath path= ;

: path>counted  cell+ dup cell+ swap @ ;

: next-path ( adr len -- adr2 len2 )
  2dup 0 scan
  dup 0= IF     2drop 0 -rot 0 -rot EXIT THEN
  >r 1+ -rot r@ 1- -rot
  r> - ;

: previous-path ( path^ -- )
  dup path>counted
  BEGIN tuck dup WHILE repeat ;

: .path ( path-addr -- ) \ gforth
    \G Display the contents of the search path @var{path-addr}.
    path>counted
    BEGIN next-path dup WHILE type space REPEAT 2drop 2drop ;

: .fpath ( -- ) \ gforth
    \G Display the contents of the Forth search path.
    fpath .path ;

: absolut-path? ( addr u -- flag ) \ gforth
    \G A path is absolute if it starts with a / or a ~ (~ expansion),
    \G or if it is in the form ./*, extended regexp: ^[/~]|./, or if
    \G it has a colon as second character ("C:...").  Paths simply
    \G containing a / are not absolute!
    2dup 2 u> swap 1+ c@ [char] : = and >r \ dos absoulte: c:/....
    over c@ [char] / = >r
    over c@ [char] ~ = >r
    \ 2dup 3 min S" ../" compare 0= r> or >r \ not catered for in expandtopic
    2 min S" ./" compare 0=
    r> r> r> or or or ;

Create ofile 0 c, 255 chars allot
Create tfile 0 c, 255 chars allot

: pathsep? dup [char] / = swap [char] \ = or ;

: need/   ofile dup c@ + c@ pathsep? 0= IF s" /" ofile +place THEN ;

: extractpath ( adr len -- adr len2 )
  BEGIN dup WHILE 1-
        2dup + c@ pathsep? IF EXIT THEN
  REPEAT ;

: remove~+ ( -- )
    ofile count 3 min s" ~+/" compare 0=
    IF
	ofile count 3 /string ofile place
    THEN ;

: expandtopic ( -- ) \ stack effect correct? - anton
    \ expands "./" into an absolute name
    ofile count 2 min s" ./" compare 0=
    IF
	ofile count 1 /string tfile place
	0 ofile c! sourcefilename extractpath ofile place
	ofile c@ IF need/ THEN
	tfile count over c@ pathsep? IF 1 /string THEN
	ofile +place
    THEN ;

: compact.. ( adr len -- adr2 len2 )
    \ deletes phrases like "xy/.." out of our directory name 2dec97jaw
    over swap
    BEGIN  dup  WHILE
        dup >r '/ scan 2dup 4 min s" /../" compare 0=
        IF
            dup r> - >r 4 /string over r> + 4 -
            swap 2dup + >r move dup r> over -
        ELSE
            rdrop dup 1 min /string
        THEN
    REPEAT  drop over - ;

: reworkdir ( -- )
  remove~+
  ofile count compact..
  nip ofile c! ;

: open-ofile ( -- fid ior )
    \G opens the file whose name is in ofile
    expandtopic reworkdir
    ofile count r/o open-file ;

: check-path ( adr1 len1 adr2 len2 -- fd 0 | 0 <>0 )
  0 ofile ! >r >r ofile place need/
  r> r> ofile +place
  open-ofile ;

: open-path-file ( addr1 u1 path-addr -- wfileid addr2 u2 0 | ior ) \ gforth
    \G Look in path @var{path-addr} for the file specified by @var{addr1 u1}.
    \G If found, the resulting path and an open file descriptor
    \G are returned. If the file is not found, @var{ior} is non-zero.
  >r
  2dup absolut-path?
  IF    rdrop
        ofile place open-ofile
	dup 0= IF >r ofile count r> THEN EXIT
  ELSE  r> path>counted
        BEGIN  next-path dup
        WHILE  5 pick 5 pick check-path
        0= IF >r 2drop 2drop r> ofile count 0 EXIT ELSE drop THEN
  REPEAT
        2drop 2drop 2drop -38
  THEN ;

: open-fpath-file ( addr1 u1 -- wfileid addr2 u2 0 | ior ) \ gforth
    \G Look in the Forth search path for the file specified by @var{addr1 u1}.
    \G If found, the resulting path and an open file descriptor
    \G are returned. If the file is not found, @var{ior} is non-zero.
    fpath open-path-file ;

fpath= ~+

[THEN]

\ \ --------------------	include require			13may99jaw

>CROSS

: add-included-file ( adr len -- adr )
  dup >fl-name char+ allocate throw >r
  file-list @ r@ ! r@ file-list !
  r@ >fl-name place r> ;

: included? ( c-addr u -- f )
  file-list
  BEGIN	@ dup
  WHILE	>r 2dup r@ >fl-name count compare 0=
	IF rdrop 2drop true EXIT THEN
	r>
  REPEAT
  2drop drop false ;	

false DebugFlag showincludedfiles

: included1 ( fd adr u -- )
\ include file adr u / fd
\ we don't use fd with include-file, because the forth system
\ doesn't know the name of the file to get a nice error report
  [d?] showincludedfiles
  IF	cr ." Including: " 2dup type ." ..." THEN
  rot close-file throw
  source-desc >r
  add-included-file to source-desc 
  sourcefilename
  ['] included catch
  r> to source-desc 
  throw ;

: included ( adr len -- )
	cross-file-list to file-list
	open-fpath-file throw 
        included1 ;

: required ( adr len -- )
	cross-file-list to file-list
	open-fpath-file throw \ 2dup cr ." R:" type
	2dup included?
	IF 	2drop close-file throw
	ELSE	included1
	THEN ;

: include bl word count included ;

: require bl word count required ;

0 [IF]

also forth definitions previous

: included ( adr len -- ) included ;

: required ( adr len -- ) required ;

: include include ;

: require require ;

[THEN]

>CROSS
hex

\ \ --------------------        Error Handling                  05aug97jaw

\ Flags

also forth definitions  \ these values may be predefined before
                        \ the cross-compiler is loaded

false DefaultValue stack-warn   	 \ check on empty stack at any definition
false DefaultValue create-forward-warn   \ warn on forward declaration of created words

previous >CROSS

: .dec
  base @ decimal swap . base ! ;

: .sourcepos
  cr sourcefilename type ." :"
  sourceline# .dec ;

: warnhead
\G display error-message head
\G perhaps with linenumber and filename
  .sourcepos ." Warning: " ;

: empty? depth IF .sourcepos ." Stack not empty!"  THEN ;

stack-warn [IF]
: defempty? empty? ;
[ELSE]
: defempty? ; immediate
[THEN]

\ \ GhostNames Ghosts                                  9may93jaw

\ second name source to search trough list

VARIABLE GhostNames
0 GhostNames !

: GhostName ( -- addr )
    align here GhostNames @ , GhostNames ! here 0 ,
    bl word count
    \ 2dup type space
    string, \ !! cfalign ?
    align ;

\ Ghost Builder                                        06oct92py

\ <T T> new version with temp variable                 10may93jaw

VARIABLE VocTemp

: <T  get-current VocTemp ! also Ghosts definitions ;
: T>  previous VocTemp @ set-current ;

hex
4711 Constant <fwd>             4712 Constant <res>
4713 Constant <imm>             4714 Constant <do:>
4715 Constant <skip>

\ iForth makes only immediate directly after create
\ make atonce trick! ?

Variable atonce atonce off

: NoExec true ABORT" CROSS: Don't execute ghost, or immediate target word" ;

: GhostHeader <fwd> , 0 , ['] NoExec , ;

: >magic ;		\ type of ghost
: >link cell+ ;		\ pointer where ghost is in target, or if unresolved
			\ points to the where we have to resolve (linked-list)
: >exec cell+ cell+ ;	\ execution symantics (while target compiling) of ghost
: >end 3 cells + ;	\ room for additional tags
			\ for builder (create, variable...) words the
			\ execution symantics of words built are placed here

Variable executed-ghost \ last executed ghost, needed in tcreate and gdoes>
Variable last-ghost	\ last ghost that is created
Variable last-header-ghost \ last ghost definitions with header

: Make-Ghost ( "name" -- ghost )
  >in @ GhostName swap >in !
  <T Create atonce @ IF immediate atonce off THEN
  here tuck swap ! ghostheader T>
  dup last-ghost !
  DOES> dup executed-ghost ! >exec @ execute ;

\ ghost words                                          14oct92py
\                                          changed:    10may93py/jaw

: gfind   ( string -- ghost true/1 / string false )
\ searches for string in word-list ghosts
  dup count [ ' ghosts >wordlist ] Literal search-wordlist
  dup IF >r >body nip r>  THEN ;

: gdiscover ( xt -- ghost true | xt false )
  GhostNames
  BEGIN @ dup
  WHILE 2dup
        cell+ @ dup >magic @ <fwd> <>
        >r >link @ = r> and
        IF cell+ @ nip true EXIT THEN
  REPEAT
  drop false ;

VARIABLE Already

: ghost   ( "name" -- ghost )
  Already off
  >in @  bl word gfind   IF  atonce off Already on nip EXIT  THEN
  drop  >in !  Make-Ghost ;

: >ghostname ( ghost -- adr len )
  GhostNames
  BEGIN @ dup
  WHILE 2dup cell+ @ =
  UNTIL nip 2 cells + count
  ELSE  2drop 
	\ true abort" CROSS: Ghostnames inconsistent"
	s" ?!?!?!"
  THEN ;

: .ghost ( ghost -- ) >ghostname type ;

\ ' >ghostname ALIAS @name

: forward? ( ghost -- flag )
  >magic @ <fwd> = ;

: undefined? ( ghost -- flag )
  >magic @ dup <fwd> = swap <skip> = or ;

\ Predefined ghosts                                    12dec92py

ghost 0=                                        drop
ghost branch    ghost ?branch                   2drop
ghost (do)      ghost (?do)                     2drop
ghost (for)                                     drop
ghost (loop)    ghost (+loop)                   2drop
ghost (next)                                    drop
ghost unloop    ghost ;S                        2drop
ghost lit       ghost (compile) ghost !         2drop drop
ghost (does>)   ghost noop                      2drop
ghost (.")      ghost (S")      ghost (ABORT")  2drop drop
ghost '                                         drop
ghost :docol    ghost :doesjump ghost :dodoes   2drop drop
ghost :dovar					drop
ghost over      ghost =         ghost drop      2drop drop
ghost - drop
ghost 2drop drop
ghost 2dup drop

\ \ Parameter for target systems                         06oct92py

\ we define it ans like...
wordlist Constant target-environment

VARIABLE env-current \ save information of current dictionary to restore with environ>

: >ENVIRON get-current env-current ! target-environment set-current ;
: ENVIRON> env-current @ set-current ; 

>TARGET

: environment? ( adr len -- [ x ] true | false )
  target-environment search-wordlist 
  IF execute true ELSE false THEN ;

: e? bl word count T environment? H 0= ABORT" environment variable not defined!" ;

: has? 	bl word count T environment? H 
	IF 	\ environment variable is present, return its value
	ELSE	\ environment variable is not present, return false
		false \ debug true ABORT" arg" 
	THEN ;

: $has? T environment? H IF ELSE false THEN ;

>ENVIRON get-order get-current swap 1+ set-order
true SetValue compiler
true SetValue cross
true SetValue standard-threading
>TARGET previous

0
[IFDEF] mach-file mach-file count 1 [THEN]
[IFDEF] machine-file machine-file 1 [THEN]
[IF] 	included hex drop
[ELSE]  cr ." No machine description!" ABORT 
[THEN]

>ENVIRON

T has? ec H
[IF]
false DefaultValue relocate
false DefaultValue file
false DefaultValue OS
false DefaultValue prims
false DefaultValue floating
false DefaultValue glocals
false DefaultValue dcomps
false DefaultValue hash
false DefaultValue xconds
false DefaultValue header
false DefaultValue new-input
[THEN]

true DefaultValue interpreter
true DefaultValue ITC
false DefaultValue rom
true DefaultValue standardthreading

>TARGET
s" relocate" T environment? H 
[IF]	SetValue NIL
[ELSE]	>ENVIRON T NIL H SetValue relocate
[THEN]

>CROSS

\ \ Create additional parameters                         19jan95py

\ currently cross only works for host machines with address-unit-bits
\ eual to 8 because of s! and sc!
\ but I start to query the environment just to modularize a little bit

: check-address-unit-bits ( -- )	
\	s" ADDRESS-UNIT-BITS" environment?
\	IF 8 <> ELSE true THEN
\	ABORT" ADDRESS-UNIT-BITS unknown or not equal to 8!"

\	shit, this doesn't work because environment? is only defined for 
\	gforth.fi and not kernl???.fi
	;

check-address-unit-bits
8 Constant bits/byte	\ we define: byte is address-unit

1 bits/byte lshift Constant maxbyte 
\ this sets byte size for the target machine, (probably right guess) jaw

T
NIL		   	Constant TNIL
cell               	Constant tcell
cell<<             	Constant tcell<<
cell>bit           	Constant tcell>bit
bits/char          	Constant tbits/char
bits/char H bits/byte T /      
			Constant tchar
float             	Constant tfloat
1 bits/char lshift 	Constant tmaxchar
[IFUNDEF] bits/byte
8			Constant tbits/byte
[ELSE]
bits/byte		Constant tbits/byte
[THEN]
H
tbits/char bits/byte /	Constant tbyte


\ Variables                                            06oct92py

Variable image
Variable tlast    TNIL tlast !  \ Last name field
Variable tlastcfa \ Last code field
Variable tdoes    \ Resolve does> calls
Variable bit$

\ statistics						10jun97jaw

Variable headers-named 0 headers-named !
Variable user-vars 0 user-vars !

: target>bitmask-size ( u1 -- u2 )
  1- tcell>bit rshift 1+ ;

: allocatetarget ( size --- adr )
  dup allocate ABORT" CROSS: No memory for target"
  swap over swap erase ;

\ \ memregion.fs


Variable last-defined-region    \ pointer to last defined region
Variable region-link            \ linked list with all regions
Variable mirrored-link          \ linked list for mirrored regions
0 dup mirrored-link ! region-link !


: >rname 6 cells + ;
: >rbm   5 cells + ;
: >rmem  4 cells + ;
: >rlink 3 cells + ;
: >rdp 2 cells + ;
: >rlen cell+ ;
: >rstart ;


: region ( addr len -- )                \G create a new region
  \ check whether predefined region exists 
  save-input bl word find >r >r restore-input throw r> r> 0= 
  IF	\ make region
	drop
	save-input create restore-input throw
	here last-defined-region !
	over ( startaddr ) , ( length ) , ( dp ) ,
	region-link linked 0 , 0 , bl word count string,
  ELSE	\ store new parameters in region
        bl word drop
	>body >r r@ last-defined-region !
	r@ >rlen ! dup r@ >rstart ! r> >rdp !
  THEN ;

: borders ( region -- startaddr endaddr ) \G returns lower and upper region border
  dup >rstart @ swap >rlen @ over + ;

: extent  ( region -- startaddr len )   \G returns the really used area
  dup >rstart @ swap >rdp @ over - ;

: area ( region -- startaddr totallen ) \G returns the total area
  dup >rstart @ swap >rlen @ ;

: mirrored                              \G mark a region as mirrored
  mirrored-link
  align linked last-defined-region @ , ;

: .addr ( u -- )
\G prints a 16 or 32 Bit nice hex value
  base @ >r hex
  tcell 2 u>
  IF s>d <# # # # # [char] . hold # # # # #> type
  ELSE s>d <# # # # # # #> type
  THEN r> base ! ;

: .regions                      \G display region statistic

  \ we want to list the regions in the right order
  \ so first collect all regions on stack
  0 region-link @
  BEGIN dup WHILE dup @ REPEAT drop
  BEGIN dup
  WHILE cr
        0 >rlink - >r
        r@ >rname count tuck type
        12 swap - 0 max spaces space
        ." Start: " r@ >rstart @ dup .addr space
        ." End: " r@ >rlen @ + .addr space
        ." DP: " r> >rdp @ .addr
  REPEAT drop
  s" rom" T $has? H 0= ?EXIT
  cr ." Mirrored:"
  mirrored-link @
  BEGIN dup
  WHILE space dup cell+ @ >rname count type @
  REPEAT drop cr
  ;

\ -------- predefined regions

0 0 region address-space
\ total memory addressed and used by the target system

0 0 region dictionary
\ rom area for the compiler

T has? rom H
[IF]
0 0 region ram-dictionary mirrored
\ ram area for the compiler
[ELSE]
' dictionary ALIAS ram-dictionary
[THEN]

0 0 region return-stack

0 0 region data-stack

0 0 region tib-region

' dictionary ALIAS rom-dictionary


: setup-target ( -- )   \G initialize targets memory space
  s" rom" T $has? H
  IF  \ check for ram and rom...
      \ address-space area nip 0<>
      ram-dictionary area nip 0<>
      rom-dictionary area nip 0<>
      and 0=
      ABORT" CROSS: define address-space, rom- , ram-dictionary, with rom-support!"
  THEN
  address-space area nip
  IF
      address-space area
  ELSE
      dictionary area
  THEN
  nip 0=
  ABORT" CROSS: define at least address-space or dictionary!!"

  \ allocate target for each region
  region-link
  BEGIN @ dup
  WHILE dup
        0 >rlink - >r
        r@ >rlen @
        IF      \ allocate mem
                r@ >rlen @ dup

                allocatetarget dup image !
                r@ >rmem !

                target>bitmask-size allocatetarget
                dup bit$ !
                r> >rbm !

        ELSE    r> drop THEN
   REPEAT drop ;

\ MakeKernal                                           		22feb99jaw

: makekernel ( targetsize -- targetsize )
  dup dictionary >rlen ! setup-target ;

>MINIMAL
: makekernel makekernel ;
>CROSS

\ \ switched tdp for rom support				03jun97jaw

\ second value is here to store some maximal value for statistics
\ tempdp is also embedded here but has nothing to do with rom support
\ (needs switched dp)

variable tempdp	0 ,	\ temporary dp for resolving
variable tempdp-save

0 [IF]
variable romdp 0 ,      \ Dictionary-Pointer for ramarea
variable ramdp 0 ,      \ Dictionary-Pointer for romarea

\
variable sramdp		\ start of ram-area for forth
variable sromdp		\ start of rom-area for forth

[THEN]


0 value tdp
variable fixed		\ flag: true: no automatic switching
			\	false: switching is done automatically

\ Switch-Policy:
\
\ a header is always compiled into rom
\ after a created word (create and variable) compilation goes to ram
\
\ Be careful: If you want to make the data behind create into rom
\ you have to put >rom before create!

variable constflag constflag off

: activate ( region -- )
\G next code goes to this region
  >rdp to tdp ;

: (switchram)
  fixed @ ?EXIT s" rom" T $has? H 0= ?EXIT
  ram-dictionary activate ;

: switchram
  constflag @
  IF constflag off ELSE (switchram) THEN ;

: switchrom
  fixed @ ?EXIT rom-dictionary activate ;

: >tempdp ( addr -- ) 
  tdp tempdp-save ! tempdp to tdp tdp ! ;
: tempdp> ( -- )
  tempdp-save @ to tdp ;

: >ram  fixed off (switchram) fixed on ;
: >rom  fixed off switchrom fixed on ;
: >auto fixed off switchrom ;



\ : romstart dup sromdp ! romdp ! ;
\ : ramstart dup sramdp ! ramdp ! ;

\ default compilation goes to rom
\ when romable support is off, only the rom switch is used (!!)
>auto

: there  tdp @ ;

>TARGET

\ \ Target Memory Handling

\ Byte ordering and cell size                          06oct92py

: cell+         tcell + ;
: cells         tcell<< lshift ;
: chars         tchar * ;
: char+		tchar + ;
: floats	tfloat * ;
    
>CROSS
: cell/         tcell<< rshift ;
>TARGET
20 CONSTANT bl
\ TNIL Constant NIL

>CROSS

bigendian
[IF]
   : S!  ( n addr -- )  >r s>d r> tcell bounds swap 1-
     DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
   : S@  ( addr -- n )  >r 0 0 r> tcell bounds
     DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP d>s ;
   : Sc!  ( n addr -- )  >r s>d r> tchar bounds swap 1-
     DO  maxbyte ud/mod rot I c!  -1 +LOOP  2drop ;
   : Sc@  ( addr -- n )  >r 0 0 r> tchar bounds
     DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  LOOP d>s ;
[ELSE]
   : S!  ( n addr -- )  >r s>d r> tcell bounds
     DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
   : S@  ( addr -- n )  >r 0 0 r> tcell bounds swap 1-
     DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP d>s ;
   : Sc!  ( n addr -- )  >r s>d r> tchar bounds
     DO  maxbyte ud/mod rot I c!  LOOP  2drop ;
   : Sc@  ( addr -- n )  >r 0 0 r> tchar bounds swap 1-
     DO  maxbyte * swap maxbyte um* rot + swap I c@ + swap  -1 +LOOP d>s ;
[THEN]

: taddr>region ( taddr -- region | 0 )
\G finds for a target-address the correct region
\G returns 0 if taddr is not in range of a target memory region
  region-link
  BEGIN @ dup
  WHILE dup >r
        0 >rlink - >r
        r@ >rlen @
        IF      dup r@ borders within
                IF r> r> drop nip EXIT THEN
        THEN
        r> drop
        r>
  REPEAT
  2drop 0 ;

: (>regionimage) ( taddr -- 'taddr )
  dup
  \ find region we want to address
  taddr>region dup 0= ABORT" Address out of range!"
  >r
  \ calculate offset in region
  r@ >rstart @ -
  \ add regions real address in our memory
  r> >rmem @ + ;

\ Bit string manipulation                               06oct92py
\                                                       9may93jaw
CREATE Bittable 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
: bits ( n -- n ) chars Bittable + c@ ;

: >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
: +bit ( addr n -- )  >bit over c@ or swap c! ;
: -bit ( addr n -- )  >bit invert over c@ and swap c! ;

: (relon) ( taddr -- )  
  [ [IFDEF] fd-relocation-table ]
  s" +" fd-relocation-table write-file throw
  dup s>d <# #s #> fd-relocation-table write-line throw
  [ [THEN] ]
  bit$ @ swap cell/ +bit ;

: (reloff) ( taddr -- ) 
  [ [IFDEF] fd-relocation-table ]
  s" -" fd-relocation-table write-file throw
  dup s>d <# #s #> fd-relocation-table write-line throw
  [ [THEN] ]
  bit$ @ swap cell/ -bit ;

: (>image) ( taddr -- absaddr ) image @ + ;

DEFER >image
DEFER relon
DEFER reloff
DEFER correcter

T has? relocate H
[IF]
' (relon) IS relon
' (reloff) IS reloff
' (>image) IS >image
[ELSE]
' drop IS relon
' drop IS reloff
' (>regionimage) IS >image
[THEN]

\ Target memory access                                 06oct92py

: align+  ( taddr -- rest )
    tcell tuck 1- and - [ tcell 1- ] Literal and ;
: cfalign+  ( taddr -- rest )
    \ see kernel.fs:cfaligned
    /maxalign tuck 1- and - [ /maxalign 1- ] Literal and ;

>TARGET
: aligned ( taddr -- ta-addr )  dup align+ + ;
\ assumes cell alignment granularity (as GNU C)

: cfaligned ( taddr1 -- taddr2 )
    \ see kernel.fs
    dup cfalign+ + ;

: @  ( taddr -- w )     >image S@ ;
: !  ( w taddr -- )     >image S! ;
: c@ ( taddr -- char )  >image Sc@ ;
: c! ( char taddr -- )  >image Sc! ;
: 2@ ( taddr -- x1 x2 ) T dup cell+ @ swap @ H ;
: 2! ( x1 x2 taddr -- ) T tuck ! cell+ ! H ;

\ Target compilation primitives                        06oct92py
\ included A!                                          16may93jaw

: here  ( -- there )    there ;
: allot ( n -- )        tdp +! ;
: ,     ( w -- )        T here H tcell T allot  ! H ;
: c,    ( char -- )     T here H tchar T allot c! H ;
: align ( -- )          T here H align+ 0 ?DO  bl T c, H tchar +LOOP ;
: cfalign ( -- )
    T here H cfalign+ 0 ?DO  bl T c, H tchar +LOOP ;

: >address		dup 0>= IF tbyte / THEN ; \ ?? jaw 
: A!                    swap >address swap dup relon T ! H ;
: A,    ( w -- )        >address T here H relon T , H ;

>CROSS

: tcmove ( source dest len -- )
\G cmove in target memory
  tchar * bounds
  ?DO  dup T c@ H I T c! H 1+
  tchar +LOOP  drop ;

\ \ Load Assembler

>TARGET
H also Forth definitions

: X 	bl word count [ ' target >wordlist ] Literal search-wordlist
	IF	state @ IF compile,
		ELSE execute THEN
	ELSE	-1 ABORT" Cross: access method not supported!"
	THEN ; immediate

[IFDEF] asm-include asm-include [THEN] hex

previous
>CROSS H

\ \ --------------------        Compiler Plug Ins               01aug97jaw

\  Compiler States

Variable comp-state
0 Constant interpreting
1 Constant compiling
2 Constant resolving
3 Constant assembling

Defer lit, ( n -- )
Defer alit, ( n -- )

Defer branch, ( target-addr -- )	\ compiles a branch
Defer ?branch, ( target-addr -- )	\ compiles a ?branch
Defer branchmark, ( -- branch-addr )	\ reserves room for a branch
Defer ?branchmark, ( -- branch-addr )	\ reserves room for a ?branch
Defer ?domark, ( -- branch-addr )	\ reserves room for a ?do branch
Defer branchto, ( -- )			\ actual program position is target of a branch (do e.g. alignment)
Defer branchtoresolve, ( branch-addr -- ) \ resolves a forward reference from branchmark
Defer branchfrom, ( -- )		\ ?!
Defer branchtomark, ( -- target-addr )	\ marks a branch destination

Defer colon, ( tcfa -- )		\ compiles call to tcfa at current position
Defer colonmark, ( -- addr )		\ marks a colon call
Defer colon-resolve ( tcfa addr -- )

Defer addr-resolve ( target-addr addr -- )
Defer doer-resolve ( ghost res-pnt target-addr addr -- ghost res-pnt )

Defer do,	( -- do-token )
Defer ?do,	( -- ?do-token )
Defer for,	( -- for-token )
Defer loop,	( do-token / ?do-token -- )
Defer +loop,	( do-token / ?do-token -- )
Defer next,	( for-token )

[IFUNDEF] ca>native
defer ca>native	
[THEN]

>TARGET
DEFER >body             \ we need the system >body
			\ and the target >body
>CROSS
T 2 cells H VALUE xt>body
DEFER doprim,	\ compiles start of a primitive
DEFER docol,   	\ compiles start of a colon definition
DEFER doer,		
DEFER fini,      \ compiles end of definition ;s
DEFER doeshandler,
DEFER dodoes,

DEFER ]comp     \ starts compilation
DEFER comp[     \ ends compilation

: (cc) T a, H ;					' (cc) IS colon,

: (cr) >tempdp ]comp colon, comp[ tempdp> ; 	' (cr) IS colon-resolve
: (ar) T ! H ;					' (ar) IS addr-resolve
: (dr)  ( ghost res-pnt target-addr addr )
	>tempdp drop over 
	dup >magic @ <do:> =
	IF 	doer,
	ELSE	dodoes,
	THEN 
	tempdp> ;				' (dr) IS doer-resolve

: (cm) ( -- addr )
    T here align H
    -1 colon, ;					' (cm) IS colonmark,

>TARGET
: compile, colon, ;
>CROSS

\ resolve structure

: >next ;		\ link to next field
: >tag cell+ ;		\ indecates type of reference: 0: call, 1: address, 2: doer
: >taddr cell+ cell+ ;	
: >ghost 3 cells + ;
: >file 4 cells + ;
: >line 5 cells + ;

: (refered) ( ghost addr tag -- )
\G creates a reference to ghost at address taddr
    rot >r here r@ >link @ , r> >link ! 
    ( taddr tag ) ,
    ( taddr ) , 
    last-header-ghost @ , 
    loadfile , 
    sourceline# , 
  ;

: refered ( ghost tag -- )
\G creates a resolve structure
    T here aligned H swap (refered)
  ;

: killref ( addr ghost -- )
\G kills a forward reference to ghost at position addr
\G this is used to eleminate a :dovar refence after making a DOES>
    dup >magic @ <fwd> <> IF 2drop EXIT THEN
    swap >r >link
    BEGIN dup @ dup  ( addr last this )
    WHILE dup >taddr @ r@ =
 	 IF   @ over !
	 ELSE nip THEN
    REPEAT rdrop 2drop 
  ;

Defer resolve-warning

: reswarn-test ( ghost res-struct -- ghost res-struct )
  over cr ." Resolving " .ghost dup ."  in " >ghost @ .ghost ;

: reswarn-forward ( ghost res-struct -- ghost res-struct )
  over warnhead .ghost dup ."  is referenced in " 
  >ghost @ .ghost ;

\ ' reswarn-test IS resolve-warning
 
\ resolve                                              14oct92py

 : resolve-loop ( ghost resolve-list tcfa -- )
    >r
    BEGIN dup WHILE 
\  	  dup >tag @ 2 = IF reswarn-forward THEN
	  resolve-warning 
	  r@ over >taddr @ 
	  2 pick >tag @
	  CASE	0 OF colon-resolve ENDOF
		1 OF addr-resolve ENDOF
		2 OF doer-resolve ENDOF
	  ENDCASE
	  @ \ next list element
    REPEAT 2drop rdrop 
  ;

\ : resolve-loop ( ghost tcfa -- ghost tcfa )
\  >r dup >link @
\  BEGIN  dup  WHILE  dup T @ H r@ rot T ! H REPEAT  drop r> ;

\ exists                                                9may93jaw

Variable TWarnings
TWarnings on
Variable Exists-Warnings
Exists-Warnings on

: exists ( ghost tcfa -- )
  over GhostNames
  BEGIN @ dup
  WHILE 2dup cell+ @ =
  UNTIL
        2 cells + count
        TWarnings @ Exists-Warnings @ and
        IF warnhead type ."  exists"
        ELSE 2drop THEN
        drop swap >link !
  ELSE  true abort" CROSS: Ghostnames inconsistent "
  THEN ;

: resolve  ( ghost tcfa -- )
\G resolve referencies to ghost with tcfa
    \ is ghost resolved?, second resolve means another definition with the
    \ same name
    over undefined? 0= IF  exists EXIT THEN
    \ get linked-list
    swap >r r@ >link @ swap \ ( list tcfa R: ghost )
    \ mark ghost as resolved
    dup r@ >link ! <res> r@ >magic !
    \ loop through forward referencies
    r> -rot 
    comp-state @ >r Resolving comp-state !
    resolve-loop 
    r> comp-state !

    ['] noop IS resolve-warning 
  ;

\ gexecute ghost,                                      01nov92py

: is-forward   ( ghost -- )
  colonmark, 0 (refered) ; \ compile space for call

: is-resolved   ( ghost -- )
  >link @ colon, ; \ compile-call

: gexecute   ( ghost -- )
  dup @ <fwd> = IF  is-forward  ELSE  is-resolved  THEN ;

: addr,  ( ghost -- )
  dup @ <fwd> = IF  1 refered 0 T a, H ELSE >link @ T a, H THEN ;

\ !! : ghost,     ghost  gexecute ;

\ .unresolved                                          11may93jaw

variable ResolveFlag

\ ?touched                                             11may93jaw

: ?touched ( ghost -- flag ) dup forward? swap >link @
                               0 <> and ;

: .forwarddefs ( ghost -- )
	."  appeared in:"
	>link
	BEGIN	@ dup
	WHILE	cr 5 spaces
		dup >ghost @ .ghost
		."  file " dup >file @ ?dup IF count type ELSE ." CON" THEN
		."  line " dup >line @ .dec
	REPEAT 
	drop ;

: ?resolved  ( ghostname -- )
  dup cell+ @ ?touched
  IF  	dup 
	cell+ cell+ count cr type ResolveFlag on 
	cell+ @ .forwarddefs
  ELSE 	drop 
  THEN ;

: .unresolved  ( -- )
  ResolveFlag off cr ." Unresolved: "
  Ghostnames
  BEGIN @ dup
  WHILE dup ?resolved
  REPEAT drop ResolveFlag @
  IF
      -1 abort" Unresolved words!"
  ELSE
      ." Nothing!"
  THEN
  cr ;

: .stats
  base @ >r decimal
  cr ." named Headers: " headers-named @ . 
  r> base ! ;

>MINIMAL

: .unresolved .unresolved ;

>CROSS
\ Header states                                        12dec92py

: flag! ( 8b -- )   tlast @ dup >r T c@ xor r> c! H ;

VARIABLE ^imm

>TARGET
: immediate     40 flag!
                ^imm @ @ dup <imm> = IF  drop  EXIT  THEN
                <res> <> ABORT" CROSS: Cannot immediate a unresolved word"
                <imm> ^imm @ ! ;
: restrict      20 flag! ;

: isdoer	
\G define a forth word as doer, this makes obviously only sence on
\G forth processors such as the PSC1000
		<do:> last-header-ghost @ >magic ! ;
>CROSS

\ Target Header Creation                               01nov92py

>TARGET
: string,  ( addr count -- )
  dup T c, H bounds  ?DO  I c@ T c, H  LOOP ; 
: name,  ( "name" -- )  bl word count T string, cfalign H ;
: view,   ( -- ) ( dummy ) ;
>CROSS

\ Target Document Creation (goes to crossdoc.fd)       05jul95py

s" ./doc/crossdoc.fd" r/w create-file throw value doc-file-id
\ contains the file-id of the documentation file

: T-\G ( -- )
    source >in @ /string doc-file-id write-line throw
    postpone \ ;

Variable to-doc  to-doc on

: cross-doc-entry  ( -- )
    to-doc @ tlast @ 0<> and	\ not an anonymous (i.e. noname) header
    IF
	s" " doc-file-id write-line throw
	s" make-doc " doc-file-id write-file throw

	tlast @ >image count 1F and doc-file-id write-file throw
	>in @
	[char] ( parse 2drop
	[char] ) parse doc-file-id write-file throw
	s"  )" doc-file-id write-file throw
	[char] \ parse 2drop					
	T-\G
	>in !
    THEN ;

\ Target TAGS creation

s" kernel.TAGS" r/w create-file throw value tag-file-id
\ contains the file-id of the tags file

Create tag-beg 2 c,  7F c, bl c,
Create tag-end 2 c,  bl c, 01 c,
Create tag-bof 1 c,  0C c,

2variable last-loadfilename 0 0 last-loadfilename 2!
	    
: put-load-file-name ( -- )
    sourcefilename last-loadfilename 2@ d<>
    IF
	tag-bof count tag-file-id write-line throw
	sourcefilename 2dup
	tag-file-id write-file throw
	last-loadfilename 2!
	s" ,0" tag-file-id write-line throw
    THEN ;

: cross-tag-entry  ( -- )
    tlast @ 0<>	\ not an anonymous (i.e. noname) header
    IF
	put-load-file-name
	source >in @ min tag-file-id write-file throw
	tag-beg count tag-file-id write-file throw
	tlast @ >image count 1F and tag-file-id write-file throw
	tag-end count tag-file-id write-file throw
	base @ decimal sourceline# 0 <# #s #> tag-file-id write-file throw
\	>in @ 0 <# #s [char] , hold #> tag-file-id write-line throw
	s" ,0" tag-file-id write-line throw
	base !
    THEN ;

\ Check for words

Defer skip? ' false IS skip?

: skipdef ( <name> -- )
\G skip definition of an undefined word in undef-words and
\G all-words mode
    ghost dup forward?
    IF  >magic <skip> swap !
    ELSE drop THEN ;

: tdefined? ( -- flag ) \ name
    ghost undefined? 0= ;

: defined2? ( -- flag ) \ name
\G return true for anything else than forward, even for <skip>
\G that's what we want
    ghost forward? 0= ;

: forced? ( -- flag ) \ name
\G return ture if it is a foreced skip with defskip
    ghost >magic @ <skip> = ;

: needed? ( -- flag ) \ name
\G returns a false flag when
\G a word is not defined
\G a forward reference exists
\G so the definition is not skipped!
    bl word gfind
    IF dup undefined?
	nip
	0=
    ELSE  drop true  THEN ;

: doer? ( -- flag ) \ name
    ghost >magic @ <do:> = ;

: skip-defs ( -- )
    BEGIN  refill  WHILE  source -trailing nip 0= UNTIL  THEN ;

\ Target header creation

Variable NoHeaderFlag
NoHeaderFlag off

: 0.r ( n1 n2 -- ) 
    base @ >r hex 
    0 swap <# 0 ?DO # LOOP #> type 
    r> base ! ;

: .sym ( adr len -- )
\G escapes / and \ to produce sed output
  bounds 
  DO I c@ dup
	CASE	[char] / OF drop ." \/" ENDOF
		[char] \ OF drop ." \\" ENDOF
		dup OF emit ENDOF
	ENDCASE
    LOOP ;

: (Theader ( "name" -- ghost )
    \  >in @ bl word count type 2 spaces >in !
    \ wordheaders will always be compiled to rom
    switchrom
    \ build header in target
    NoHeaderFlag @
    IF  NoHeaderFlag off
    ELSE
	T align H view,
	tlast @ dup 0> IF tcell - THEN T A, H  there tlast !
	1 headers-named +!	\ Statistic
	>in @ T name, H >in !
    THEN
    T cfalign here H tlastcfa !
    \ Old Symbol table sed-script
\    >in @ cr ." sym:s/CFA=" there 4 0.r ." /"  bl word count .sym ." /g" cr >in !
    ghost
    \ output symbol table to extra file
    [ [IFDEF] fd-symbol-table ]
      base @ hex there s>d <# 8 0 DO # LOOP #> fd-symbol-table write-file throw base !
      s" :" fd-symbol-table write-file throw
      dup >ghostname fd-symbol-table write-line throw
    [ [THEN] ]
    dup Last-Header-Ghost !
    dup >magic ^imm !     \ a pointer for immediate
    Already @
    IF  dup >end tdoes !
    ELSE 0 tdoes !
    THEN
    80 flag!
    cross-doc-entry cross-tag-entry ;

VARIABLE ;Resolve 1 cells allot
\ this is the resolver information from ":"
\ resolving is done by ";"

: Theader  ( "name" -- ghost )
  (THeader dup there resolve 0 ;Resolve ! ;

>TARGET
: Alias    ( cfa -- ) \ name
    >in @ skip? IF  2drop  EXIT  THEN  >in !
    dup 0< s" prims" T $has? H 0= and
    IF
	.sourcepos ." needs prim: " >in @ bl word count type >in ! cr
    THEN
    (THeader over resolve T A, H 80 flag! ;
: Alias:   ( cfa -- ) \ name
    >in @ skip? IF  2drop  EXIT  THEN  >in !
    dup 0< s" prims" T $has? H 0= and
    IF
	.sourcepos ." needs doer: " >in @ bl word count type >in ! cr
    THEN
    ghost tuck swap resolve <do:> swap >magic ! ;

Variable prim#
: first-primitive ( n -- )  prim# ! ;
: Primitive  ( -- ) \ name
    prim# @ T Alias H  -1 prim# +! ;
>CROSS

\ Conditionals and Comments                            11may93jaw

: ;Cond
  postpone ;
  swap ! ;  immediate

: Cond: ( -- ) \ name {code } ;
  atonce on
  ghost
  >exec
  :NONAME ;

: restrict? ( -- )
\ aborts on interprete state - ae
  state @ 0= ABORT" CROSS: Restricted" ;

: Comment ( -- )
  >in @ atonce on ghost swap >in ! ' swap >exec ! ;

Comment (       Comment \

\ compile                                              10may93jaw

: compile  ( -- ) \ name
  restrict?
  bl word gfind dup 0= ABORT" CROSS: Can't compile "
  0> ( immediate? )
  IF    >exec @ compile,
  ELSE  postpone literal postpone gexecute  THEN ;
                                        immediate

: [G'] 
\G ticks a ghost and returns its address
  bl word gfind 0= ABORT" CROSS: Ghost don't exists"
  state @
  IF   postpone literal
  THEN ; immediate

: ghost>cfa
  dup undefined? ABORT" CROSS: forward " >link @ ;
               
>TARGET

: '  ( -- cfa ) 
\ returns the target-cfa of a ghost
  bl word gfind 0= ABORT" CROSS: Ghost don't exists"
  ghost>cfa ;

Cond: [']  T ' H alit, ;Cond

>CROSS

: [T']
\ returns the target-cfa of a ghost, or compiles it as literal
  postpone [G'] state @ IF postpone ghost>cfa ELSE ghost>cfa THEN ; immediate

\ \ threading modell					13dec92py
\ modularized						14jun97jaw

: fillcfa   ( usedcells -- )
  T cells H xt>body swap - 0 ?DO 0 X c, tchar +LOOP ;

: (>body)   ( cfa -- pfa ) xt>body + ;		' (>body) T IS >body H

: (doer,)   ( ghost -- ) ]comp gexecute comp[ 1 fillcfa ;   ' (doer,) IS doer,

: (docol,)  ( -- ) [G'] :docol doer, ;		' (docol,) IS docol,

: (doprim,) ( -- )
  there xt>body + ca>native T a, H 1 fillcfa ;	' (doprim,) IS doprim,

: (doeshandler,) ( -- ) 
  T cfalign H compile :doesjump T 0 , H ; 	' (doeshandler,) IS doeshandler,

: (dodoes,) ( does-action-ghost -- )
  ]comp [G'] :dodoes gexecute comp[
  addr,
  T here H tcell - reloff 2 fillcfa ;		' (dodoes,) IS dodoes,

: (lit,) ( n -- )   compile lit T  ,  H ;	' (lit,) IS lit,

\ if we dont produce relocatable code alit, defaults to lit, jaw
\ this is just for convenience, so we don't have to define alit,
\ seperately for embedded systems....
T has? relocate H
[IF]
: (alit,) ( n -- )  compile lit T  a, H ;	' (alit,) IS alit,
[ELSE]
: (alit,) ( n -- )  lit, ;			' (alit,) IS alit,
[THEN]

: (fini,)         compile ;s ;                ' (fini,) IS fini,

[IFUNDEF] (code) 
Defer (code)
Defer (end-code)
[THEN]

>TARGET
: Code
  defempty?
  (THeader there resolve
  [ T e? prims H 0= [IF] T e? ITC H [ELSE] true [THEN] ] [IF]
  doprim, 
  [THEN]
  depth (code) ;

: Code:
  defempty?
    ghost dup there ca>native resolve  <do:> swap >magic !
    depth (code) ;

: end-code
    (end-code)
    depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
    ELSE true ABORT" CROSS: Stack empty" THEN
    ;

>CROSS

\ tLiteral                                             12dec92py

>TARGET
Cond: \G  T-\G ;Cond

Cond:  Literal ( n -- )   restrict? lit, ;Cond
Cond: ALiteral ( n -- )   restrict? alit, ;Cond

: Char ( "<char>" -- )  bl word char+ c@ ;
Cond: [Char]   ( "<char>" -- )  restrict? Char  lit, ;Cond

\ some special literals					27jan97jaw

\ !! Known Bug: Special Literals and plug-ins work only correct
\ on 16 and 32 Bit Targets and 32 Bit Hosts!

Cond: MAXU
  restrict? 
  tcell 1 cells u> 
  IF	compile lit tcell 0 ?DO FF T c, H LOOP 
  ELSE	ffffffff lit, THEN
  ;Cond

Cond: MINI
  restrict?
  tcell 1 cells u>
  IF	compile lit bigendian 
  	IF	80 T c, H tcell 1 ?DO 0 T c, H LOOP 
  	ELSE  	tcell 1 ?DO 0 T c, H LOOP 80 T c, H
  	THEN
  ELSE	tcell 2 = IF 8000 ELSE 80000000 THEN lit, THEN
  ;Cond
 
Cond: MAXI
 restrict?
 tcell 1 cells u>
 IF	compile lit bigendian 
	IF 	7F T c, H tcell 1 ?DO FF T c, H LOOP
	ELSE 	tcell 1 ?DO FF T c, H LOOP 7F T c, H
 	THEN
 ELSE	tcell 2 = IF 7fff ELSE 7fffffff THEN lit, THEN
 ;Cond

>CROSS
\ Target compiling loop                                12dec92py
\ ">tib trick thrown out                               10may93jaw
\ number? defined at the top                           11may93jaw
\ replaced >in by save-input				

: discard 0 ?DO drop LOOP ;

\ compiled word might leave items on stack!
: tcom ( x1 .. xn n name -- )
\  dup count type space
  gfind  ?dup
  IF    >r >r discard r> r>
	0> IF	>exec @ execute
	ELSE	gexecute  THEN 
	EXIT 
  THEN
  number? dup  
  IF	0> IF swap lit,  THEN  lit, discard
  ELSE	2drop restore-input throw ghost gexecute THEN  ;

>TARGET
\ : ; DOES>                                            13dec92py
\ ]                                                     9may93py/jaw

: ] state on
    Compiling comp-state !
    BEGIN
        BEGIN save-input bl word
              dup c@ 0= WHILE drop discard refill 0=
              ABORT" CROSS: End of file while target compiling"
        REPEAT
        tcom
        state @
        0=
    UNTIL ;

\ by the way: defining a second interpreter (a compiler-)loop
\             is not allowed if a system should be ans conform

: : ( -- colon-sys ) \ Name
  defempty?
  constflag off \ don't let this flag work over colon defs
		\ just to go sure nothing unwanted happens
  >in @ skip? IF  drop skip-defs  EXIT  THEN  >in !
  (THeader ;Resolve ! there ;Resolve cell+ !
  docol, ]comp depth T ] H ;

: :noname ( -- colon-sys )
  T cfalign H there docol, 0 ;Resolve ! depth T ] H ;

Cond: EXIT ( -- )  restrict?  compile ;S  ;Cond

Cond: ?EXIT ( -- ) 1 abort" CROSS: using ?exit" ;Cond

>CROSS
: LastXT ;Resolve @ 0= abort" CROSS: no definition for LastXT"
         ;Resolve cell+ @ ;

>TARGET

Cond: recurse ( -- ) Last-Ghost @ gexecute ;Cond

Cond: ; ( -- ) restrict?
               depth ?dup IF   1- <> ABORT" CROSS: Stack changed"
                          ELSE true ABORT" CROSS: Stack empty" THEN
               fini,
               comp[
               state off
               ;Resolve @
               IF ;Resolve @ ;Resolve cell+ @ resolve THEN
		Interpreting comp-state !
               ;Cond
Cond: [  restrict? state off Interpreting comp-state ! ;Cond

>CROSS

Create GhostDummy ghostheader
<res> GhostDummy >magic !

: !does ( does-action -- )
\ !! zusammenziehen und dodoes, machen!
    tlastcfa @ [G'] :dovar killref
\    tlastcfa @ dup there >r tdp ! compile :dodoes r> tdp ! T cell+ ! H ;
\ !! geht so nicht, da dodoes, ghost will!
    GhostDummy >link ! GhostDummy 
    tlastcfa @ >tempdp dodoes, tempdp> ;

>TARGET
Cond: DOES> restrict?
        compile (does>) doeshandler, 
	\ resolve words made by builders
	tdoes @ ?dup IF  @ T here H resolve THEN
        ;Cond
: DOES> switchrom doeshandler, T here H !does depth T ] H ;

>CROSS
\ Creation                                             01nov92py

\ Builder                                               11may93jaw

: Builder    ( Create-xt do:-xt "name" -- )
\ builds up a builder in current vocabulary
\ create-xt is executed when word is interpreted
\ do:-xt is executet when the created word from builder is executed
\ for do:-xt an additional entry after the normal ghost-enrys is used

  Make-Ghost 		( Create-xt do:-xt ghost )
  rot swap		( do:-xt Create-xt ghost )
  >exec ! , ;
\  rot swap >exec dup @ ['] NoExec <>
\  IF 2drop ELSE ! THEN , ;

: gdoes,  ( ghost -- )
\ makes the codefield for a word that is built
  >end @ dup undefined? 0=
  IF
	dup >magic @ <do:> =
	IF 	 doer, 
	ELSE	dodoes,
	THEN
	EXIT
  THEN
\  compile :dodoes gexecute
\  T here H tcell - reloff 
  2 refered 
  0 fillcfa
  ;

: TCreate ( <name> -- )
  executed-ghost @
  create-forward-warn
  IF ['] reswarn-forward IS resolve-warning THEN
  Theader >r dup gdoes,
\ stores execution semantic in the built word
\ if the word already has a semantic (concerns S", IS, .", DOES>)
\ then keep it
  >end @ >exec @ r> >exec dup @ ['] NoExec =
  IF ! ELSE 2drop THEN ;

: RTCreate ( <name> -- )
\ creates a new word with code-field in ram
  executed-ghost @
  create-forward-warn
  IF ['] reswarn-forward IS resolve-warning THEN
  \ make Alias
  (THeader there 0 T a, H 80 flag! ( S executed-ghost new-ghost )
  \ store  poiter to code-field
  switchram T cfalign H
  there swap T ! H
  there tlastcfa ! 
  dup there resolve 0 ;Resolve !
  >r dup gdoes,
\ stores execution semantic in the built word
\ if the word already has a semantic (concerns S", IS, .", DOES>)
\ then keep it
  >end @ >exec @ r> >exec dup @ ['] NoExec =
  IF ! ELSE 2drop THEN ;

: Build:  ( -- [xt] [colon-sys] )
  :noname postpone TCreate ;

: BuildSmart:  ( -- [xt] [colon-sys] )
  :noname
  [ T has? rom H [IF] ]
  postpone RTCreate
  [ [ELSE] ]
  postpone TCreate 
  [ [THEN] ] ;

: gdoes>  ( ghost -- addr flag )
  executed-ghost @
  state @ IF  gexecute true EXIT  THEN
  >link @ T >body H false ;

\ DO: ;DO                                               11may93jaw
\ changed to ?EXIT                                      10may93jaw

: DO:     ( -- addr [xt] [colon-sys] )
  here ghostheader
  :noname postpone gdoes> postpone ?EXIT ;

: by:     ( -- addr [xt] [colon-sys] ) \ name
  ghost
  :noname postpone gdoes> postpone ?EXIT ;

: ;DO ( addr [xt] [colon-sys] -- addr )
  postpone ;    ( S addr xt )
  over >exec ! ; immediate

: by      ( -- addr ) \ Name
  ghost >end @ ;

>TARGET
\ Variables and Constants                              05dec92py

Build:  ( n -- ) ;
by: :docon ( ghost -- n ) T @ H ;DO
Builder (Constant)

Build:  ( n -- ) T , H ;
by (Constant)
Builder Constant

Build:  ( n -- ) T A, H ;
by (Constant)
Builder AConstant

Build:  ( d -- ) T , , H ;
DO: ( ghost -- d ) T dup cell+ @ swap @ H ;DO
Builder 2Constant

BuildSmart: ;
by: :dovar ( ghost -- addr ) ;DO
Builder Create

T has? rom H [IF]
Build: ( -- ) T here 0 , H switchram T align here swap ! 0 , H ( switchrom ) ;
by (Constant)
Builder Variable
[ELSE]
Build: T 0 , H ;
by Create
Builder Variable
[THEN]

T has? rom H [IF]
Build: ( -- ) T here 0 , H switchram T align here swap ! 0 , 0 , H ( switchrom ) ;
by (Constant)
Builder 2Variable
[ELSE]
Build: T 0 , 0 , H ;
by Create
Builder 2Variable
[THEN]

T has? rom H [IF]
Build: ( -- ) T here 0 , H switchram T align here swap ! 0 , H ( switchrom ) ;
by (Constant)
Builder AVariable
[ELSE]
Build: T 0 A, H ;
by Create
Builder AVariable
[THEN]

\ User variables                                       04may94py

>CROSS

Variable tup  0 tup !
Variable tudp 0 tudp !

: u,  ( n -- udp )
  tup @ tudp @ + T  ! H
  tudp @ dup T cell+ H tudp ! ;

: au, ( n -- udp )
  tup @ tudp @ + T A! H
  tudp @ dup T cell+ H tudp ! ;

>TARGET

Build: 0 u, X , ;
by: :douser ( ghost -- up-addr )  X @ tup @ + ;DO
Builder User

Build: 0 u, X , 0 u, drop ;
by User
Builder 2User

Build: 0 au, X , ;
by User
Builder AUser

BuildSmart: T , H ;
by (Constant)
Builder Value

BuildSmart: T A, H ;
by (Constant)
Builder AValue

BuildSmart:  ( -- ) [T'] noop T A, H ;
by: :dodefer ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
Builder Defer

Build: ( inter comp -- ) swap T immediate A, A, H ;
DO: ( ghost -- ) ABORT" CROSS: Don't execute" ;DO
Builder interpret/compile:

\ Sturctures                                           23feb95py

>CROSS
: nalign ( addr1 n -- addr2 )
\ addr2 is the aligned version of addr1 wrt the alignment size n
 1- tuck +  swap invert and ;
>TARGET

Build: ;
by: :dofield T @ H + ;DO
Builder (Field)

Build: ( align1 offset1 align size "name" --  align2 offset2 )
    rot dup T , H ( align1 align size offset1 )
    + >r nalign r> ;
by (Field)
Builder Field

: struct  T 1 chars 0 H ;
: end-struct  T 2Constant H ;

: cell% ( n -- size align )
    T 1 cells H dup ;

Build: ( m v -- m' v )  dup T , H cell+ ;
DO:  abort" Not in cross mode" ;DO
Builder input-method

Build: ( m v size -- m v' )  over T , H + ;
DO:  abort" Not in cross mode" ;DO
Builder input-var

\ structural conditionals                              17dec92py

>CROSS
: ?struc      ( flag -- )       ABORT" CROSS: unstructured " ;
: sys?        ( sys -- sys )    dup 0= ?struc ;
: >mark       ( -- sys )        T here  ( dup ." M" hex. ) 0 , H ;

: branchoffset ( src dest -- )  - tchar / ; \ ?? jaw

: >resolve    ( sys -- )        
	X here ( dup ." >" hex. ) over branchoffset swap X ! ;

: <resolve    ( sys -- )
	X here ( dup ." <" hex. ) branchoffset X , ;

:noname compile branch X here branchoffset X , ;
  IS branch, ( target-addr -- )
:noname compile ?branch X here branchoffset X , ;
  IS ?branch, ( target-addr -- )
:noname compile branch T here 0 , H ;
  IS branchmark, ( -- branchtoken )
:noname compile ?branch T here 0 , H ;
  IS ?branchmark, ( -- branchtoken )
:noname T here 0 , H ;
  IS ?domark, ( -- branchtoken )
:noname dup X @ ?struc X here over branchoffset swap X ! ;
  IS branchtoresolve, ( branchtoken -- )
:noname branchto, X here ;
  IS branchtomark, ( -- target-addr )

>TARGET

\ Structural Conditionals                              12dec92py

Cond: BUT       restrict? sys? swap ;Cond
Cond: YET       restrict? sys? dup ;Cond

>CROSS

Variable tleavings 0 tleavings !

: (done) ( addr -- )
    tleavings @
    BEGIN  dup
    WHILE
	>r dup r@ cell+ @ \ address of branch
	u> 0=	   \ lower than DO?	
    WHILE
	r@ 2 cells + @ \ branch token
	branchtoresolve,
	r@ @ r> free throw
    REPEAT  r>  THEN
    tleavings ! drop ;

>TARGET

Cond: DONE   ( addr -- )  restrict? (done) ;Cond

>CROSS
: (leave) ( branchtoken -- )
    3 cells allocate throw >r
    T here H r@ cell+ !
    r@ 2 cells + !
    tleavings @ r@ !
    r> tleavings ! ;
>TARGET

Cond: LEAVE     restrict? branchmark, (leave) ;Cond
Cond: ?LEAVE    restrict? compile 0=  ?branchmark, (leave)  ;Cond

>CROSS
\ !!JW ToDo : Move to general tools section

: to1 ( x1 x2 xn n -- addr )
\G packs n stack elements in a allocated memory region
   dup dup 1+ cells allocate throw dup >r swap 1+
   0 DO tuck ! cell+ LOOP
   drop r> ;
: 1to ( addr -- x1 x2 xn )
\G unpacks the elements saved by to1
    dup @ swap over cells + swap
    0 DO  dup @ swap 1 cells -  LOOP
    free throw ;

: loop]     branchto, dup <resolve tcell - (done) ;

: skiploop] ?dup IF branchto, branchtoresolve, THEN ;

>TARGET

\ Structural Conditionals                              12dec92py

>TARGET
Cond: AHEAD     restrict? branchmark, ;Cond
Cond: IF        restrict? ?branchmark, ;Cond
Cond: THEN      restrict? sys? branchto, branchtoresolve, ;Cond
Cond: ELSE      restrict? sys? compile AHEAD swap compile THEN ;Cond

Cond: BEGIN     restrict? branchtomark, ;Cond
Cond: WHILE     restrict? sys? compile IF swap ;Cond
Cond: AGAIN     restrict? sys? branch, ;Cond
Cond: UNTIL     restrict? sys? ?branch, ;Cond
Cond: REPEAT    restrict? over 0= ?struc compile AGAIN compile THEN ;Cond

Cond: CASE      restrict? 0 ;Cond
Cond: OF        restrict? 1+ >r compile over compile =
                compile IF compile drop r> ;Cond
Cond: ENDOF     restrict? >r compile ELSE r> ;Cond
Cond: ENDCASE   restrict? compile drop 0 ?DO  compile THEN  LOOP ;Cond

\ Structural Conditionals                              12dec92py

:noname \ ?? i think 0 is too much! jaw
    0 compile (do)
    branchtomark,  2 to1 ;
  IS do, ( -- target-addr )

\ :noname
\     compile 2dup compile = compile IF
\     compile 2drop compile ELSE
\     compile (do) branchtomark, 2 to1 ;
\   IS ?do,
    
:noname
    0 compile (?do)  ?domark, (leave)
    branchtomark,  2 to1 ;
  IS ?do, ( -- target-addr )
:noname compile (for) branchtomark, ;
  IS for, ( -- target-addr )
:noname 1to compile (loop)  loop] compile unloop skiploop] ;
  IS loop, ( target-addr -- )
:noname 1to compile (+loop)  loop] compile unloop skiploop] ;
  IS +loop, ( target-addr -- )
:noname compile (next)  loop] compile unloop ;
  IS next, ( target-addr -- )

Cond: DO      	restrict? do, ;Cond
Cond: ?DO     	restrict? ?do, ;Cond
Cond: FOR	restrict? for, ;Cond

Cond: LOOP	restrict? sys? loop, ;Cond
Cond: +LOOP	restrict? sys? +loop, ;Cond
Cond: NEXT	restrict? sys? next, ;Cond

\ String words                                         23feb93py

: ,"            [char] " parse T string, align H ;

Cond: ."        restrict? compile (.")     T ," H ;Cond
Cond: S"        restrict? compile (S")     T ," H ;Cond
Cond: ABORT"    restrict? compile (ABORT") T ," H ;Cond

Cond: IS        T ' >body H compile ALiteral compile ! ;Cond
: IS            T >address ' >body ! H ;
Cond: TO        T ' >body H compile ALiteral compile ! ;Cond
: TO            T ' >body ! H ;

Cond: defers	T ' >body @ compile, H ;Cond
: on		T -1 swap ! H ; 
: off   	T 0 swap ! H ;

\ LINKED ERR" ENV" 2ENV"                                18may93jaw

\ linked list primitive
: linked        X here over X @ X A, swap X ! ;
: chained	T linked A, H ;

: err"   s" ErrLink linked" evaluate T , H
         [char] " parse T string, align H ;

: env"  [char] " parse s" EnvLink linked" evaluate
        T string, align , H ;

: 2env" [char] " parse s" EnvLink linked" evaluate
        here >r T string, align , , H
        r> dup T c@ H 80 and swap T c! H ;

\ compile must be last                                 22feb93py

Cond: compile ( -- ) restrict? \ name
      bl word gfind dup 0= ABORT" CROSS: Can't compile"
      0> IF    gexecute
         ELSE  dup >magic @ <imm> =
               IF   gexecute
               ELSE compile (compile) addr, THEN THEN ;Cond

Cond: postpone ( -- ) restrict? \ name
      bl word gfind dup 0= ABORT" CROSS: Can't compile"
      0> IF    gexecute
         ELSE  dup >magic @ <imm> =
               IF   gexecute
	       ELSE compile (compile) addr, THEN THEN ;Cond
	   
\ save-cross                                           17mar93py

hex

>CROSS
Create magic  s" Gforth2x" here over allot swap move

bigendian 1+ \ strangely, in magic big=0, little=1
tcell 1 = 0 and or
tcell 2 = 2 and or
tcell 4 = 4 and or
tcell 8 = 6 and or
tchar 1 = 00 and or
tchar 2 = 28 and or
tchar 4 = 50 and or
tchar 8 = 78 and or
magic 7 + c!

: save-cross ( "image-name" "binary-name" -- )
  bl parse ." Saving to " 2dup type cr
  w/o bin create-file throw >r
  TNIL IF
      s" #! "           r@ write-file throw
      bl parse          r@ write-file throw
      s"  --image-file" r@ write-file throw
      #lf       r@ emit-file throw
      r@ dup file-position throw drop 8 mod 8 swap ( file-id limit index )
      ?do
	  bl over emit-file throw
      loop
      drop
      magic 8       r@ write-file throw \ write magic
  ELSE
      bl parse 2drop
  THEN
  image @ there 
  r@ write-file throw \ write image
  TNIL IF
      bit$  @ there 1- tcell>bit rshift 1+
                r@ write-file throw \ write tags
  THEN
  r> close-file throw ;

: save-region ( addr len -- )
  bl parse w/o bin create-file throw >r
  swap >image swap r@ write-file throw
  r> close-file throw ;

\ \ minimal definitions
	   
>MINIMAL also minimal

\ Usefull words                                        13feb93py

: KB  400 * ;

\ \ [IF] [ELSE] [THEN] ...				14sep97jaw

\ it is useful to define our own structures and not to rely
\ on the words in the compiler
\ The words in the compiler might be defined with vocabularies
\ this doesn't work with our self-made compile-loop

Create parsed 20 chars allot	\ store word we parsed

: upcase
    parsed count bounds
    ?DO I c@ toupper I c! LOOP ;

: [ELSE]
    1 BEGIN
	BEGIN bl word count dup WHILE
	    comment? 20 umin parsed place upcase parsed count
	    2dup s" [IF]" compare 0= >r 
	    2dup s" [IFUNDEF]" compare 0= >r
	    2dup s" [IFDEF]" compare 0= r> or r> or
	    IF   2drop 1+
	    ELSE 2dup s" [ELSE]" compare 0=
		IF   2drop 1- dup
		    IF 1+
		    THEN
		ELSE
		    2dup s" [ENDIF]" compare 0= >r
		    s" [THEN]" compare 0= r> or
		    IF 1- THEN
		THEN
	    THEN
	    ?dup 0= ?EXIT
	REPEAT
	2drop refill 0=
    UNTIL drop ; immediate
  
: [THEN] ( -- ) ; immediate

: [ENDIF] ( -- ) ; immediate

: [IF] ( flag -- )
    0= IF postpone [ELSE] THEN ; immediate 

Cond: [IF]      postpone [IF] ;Cond
Cond: [THEN]    postpone [THEN] ;Cond
Cond: [ELSE]    postpone [ELSE] ;Cond

\ define new [IFDEF] and [IFUNDEF]                      20may93jaw

: defined? tdefined? ;
: needed? needed? ;
: doer? doer? ;

\ we want to use IFDEF on compiler directives (e.g. E?) in the source, too

: directive? 
  bl word count [ ' target >wordlist ] literal search-wordlist 
  dup IF nip THEN ;

: [IFDEF]  >in @ directive? swap >in !
	   0= IF tdefined? ELSE name 2drop true THEN
	   postpone [IF] ;

: [IFUNDEF] tdefined? 0= postpone [IF] ;

Cond: [IFDEF]   postpone [IFDEF] ;Cond

Cond: [IFUNDEF] postpone [IFUNDEF] ;Cond

\ C: \- \+ Conditional Compiling                         09jun93jaw

: C: >in @ tdefined? 0=
     IF    >in ! X :
     ELSE drop
        BEGIN bl word dup c@
              IF   count comment? s" ;" compare 0= ?EXIT
              ELSE refill 0= ABORT" CROSS: Out of Input while C:"
              THEN
        AGAIN
     THEN ;

: d? d? ;

\G doesn't skip line when debug switch is on
: \D D? 0= IF postpone \ THEN ;

\G interprets the line if word is not defined
: \- tdefined? IF postpone \ THEN ;

\G interprets the line if word is defined
: \+ tdefined? 0= IF postpone \ THEN ;

Cond: \- \- ;Cond
Cond: \+ \+ ;Cond
Cond: \D \D ;Cond

: ?? bl word find IF execute ELSE drop 0 THEN ;

: needed:
\G defines ghost for words that we want to be compiled
  BEGIN >in @ bl word c@ WHILE >in ! ghost drop REPEAT drop ;

\ words that should be in minimal

create s-buffer 50 chars allot

bigendian Constant bigendian

: here there ;
: equ constant ;
: mark there constant ;

\ compiler directives
: >ram >ram ;
: >rom >rom ;
: >auto >auto ;
: >tempdp >tempdp ;
: tempdp> tempdp> ;
: const constflag on ;
: warnings name 3 = 0= twarnings ! drop ;
: | ;
\ : | NoHeaderFlag on ; \ This is broken (damages the last word)

: save-cross save-cross ;
: save-region save-region ;
: tdump swap >image swap dump ;

also forth 
[IFDEF] Label           : Label defempty? Label ; [THEN] 
[IFDEF] start-macros    : start-macros defempty? start-macros ; [THEN]
\ [IFDEF] builttag	: builttag builttag ;	[THEN]
previous

: s" [char] " parse s-buffer place s-buffer count ; \ for environment?
: + + ;
: 1+ 1 + ;
: 2+ 2 + ;
: 1- 1- ;
: - - ;
: and and ;
: or or ;
: 2* 2* ;
: * * ;
: / / ;
: dup dup ;
: over over ;
: swap swap ;
: rot rot ;
: drop drop ;
: =   = ;
: 0=   0= ;
: lshift lshift ;
: 2/ 2/ ;
: . . ;

: all-words    ['] forced?    IS skip? ;
: needed-words ['] needed?  IS skip? ;
: undef-words  ['] defined2? IS skip? ;
: skipdef skipdef ;

: \  postpone \ ;  immediate
: \G T-\G ; immediate
: (  postpone ( ;  immediate
: include bl word count included ;
: require require ;
: .( [char] ) parse type ;
: ." [char] " parse type ;
: cr cr ;

: times 0 ?DO dup X c, LOOP drop ; \ used for space table creation

\ only forth also cross also minimal definitions order

\ cross-compiler words

: decimal       decimal ;
: hex           hex ;

\ : tudp          X tudp ;
\ : tup           X tup ;

: doc-off       false to-doc ! ;
: doc-on        true  to-doc ! ;

[IFDEF] dbg : dbg dbg ; [THEN]

\ for debugging...
: order         order ;
: hwords         words ;
: words 	also ghosts words previous ;
: .s            .s ;
: bye           bye ;

\ turnkey direction
: H forth ; immediate
: T minimal ; immediate
: G ghosts ; immediate

: turnkey 
   \GFORTH 0 set-order also ghosts
   \ANSI [ ' ghosts >wordlist ] Literal 1 set-order
   also target definitions
   also Minimal also ;

\ these ones are pefered:

: lock   turnkey ;
: unlock previous forth also cross ;

\ also minimal
: [[ also unlock ;
: ]] previous previous also also ;

unlock definitions also minimal
: lock   lock ;
lock

\ load cross compiler extension defined in mach file

UNLOCK >CROSS

[IFDEF] extend-cross extend-cross [THEN]

LOCK

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