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/******************************************************************************
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* Copyright (c) 2004, 2008 IBM Corporation
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* This program and the accompanying materials
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* are made available under the terms of the BSD License
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* which accompanies this distribution, and is available at
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* http://www.opensource.org/licenses/bsd-license.php
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* IBM Corporation - initial implementation
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*****************************************************************************/
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// ============================================================================
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// ============================================================================
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// Copyright 2002,2003,2004 Segher Boessenkool <segher@kernel.crashing.org>
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// This is the core engine of Paflof. It is almost ANS Forth compatible.
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// There are two possibilities why an aspect would not be:
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// a) Open Firmware requires different semantics;
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// Most of the "extended" semantics defined in the OF specification are
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// not implemented; just the bare essentials. For example, you can't
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// use structural words (IF, THEN, BEGIN, etc.) or return-stack
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// manipulation words (R> etc.) in the interpreter.
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// The data stack pointer.
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raw(HERE DOVAL _A(the_mem))
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// Some common constant numbers; smaller and faster if they are defined
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// as constants, than when inlined as a literal.
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con(H#FFFFFFFF 0xffffffff)
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// Manipulating different kinds of addresses.
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// Run-time words for TO and for string literals.
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col(DOTO R> CELL+ DUP >R @ CELL+ !)
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col(SLITERAL R> CELL+ DUP DUP C@ + LIT(-CELLSIZE) AND >R)
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// Stack manipulation.
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col(?DUP DUP 0BRANCH(1) DUP)
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col(3DUP 2 PICK 2 PICK 2 PICK)
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col(2OVER 3 PICK 3 PICK)
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col(3DROP DROP DROP DROP)
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col(ROT >R SWAP R> SWAP)
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col(-ROT SWAP >R SWAP R>)
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col(2SWAP >R -ROT R> -ROT)
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col(2ROT >R >R 2SWAP R> R> 2SWAP)
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col(ROLL DUP ?DUP 0BRANCH(6) ROT >R 1 - BRANCH(-9) ?DUP 0BRANCH(6) R> -ROT 1 - BRANCH(-9))
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col(-ROLL DUP ?DUP 0BRANCH(9) >R ROT R> SWAP >R 1 - BRANCH(-12) ?DUP 0BRANCH(6) R> SWAP 1 - BRANCH(-9))
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col(2>R R> ROT >R SWAP >R >R)
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col(2R> R> R> R> ROT >R SWAP)
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col(2R@ R> R> R@ OVER >R ROT >R SWAP)
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col(WITHIN ROT DUP ROT >= 0BRANCH(3) 2DROP FALSE EXIT > 0BRANCH(2) FALSE EXIT TRUE)
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col(BETWEEN 1 + WITHIN)
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// Double-cell single-bit shifts.
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col(D2* 2* OVER 0< - >R 2* R>)
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col(UD2/ >R U2/ R@ LIT(8*CELLSIZE-1) LSHIFT OR R> U2/)
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col(D2/ >R U2/ R@ LIT(8*CELLSIZE-1) LSHIFT OR R> 2/)
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col(ABS DUP 0< 0BRANCH(1) NEGATE)
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col(MAX 2DUP < 0BRANCH(1) SWAP DROP)
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col(MIN 2DUP > 0BRANCH(1) SWAP DROP)
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col(BOUNDS OVER + SWAP)
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// Double-cell and mixed-size arithmetic.
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col(DNEGATE INVERT >R NEGATE DUP 0= R> SWAP -)
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col(DABS DUP 0< 0BRANCH(1) DNEGATE)
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col(M+ SWAP >R DUP >R + DUP R> U< R> SWAP -)
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col(*' >R DUP 0< >R D2* R> 0BRANCH(2) R@ M+ R>)
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col(UM* 0 -ROT LIT(8*CELLSIZE) 0 DODO *' DOLOOP(-3) DROP)
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col(M* 2DUP XOR >R >R ABS R> ABS UM* R> 0< 0BRANCH(1) DNEGATE)
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col(/' >R DUP 0< >R D2* R> OVER R@ U>= OR 0BRANCH(6) >R 1 OR R> R@ - R>)
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col(UM/MOD LIT(8*CELLSIZE) 0 DODO /' DOLOOP(-3) DROP SWAP)
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col(SM/REM OVER >R >R DABS R@ ABS UM/MOD R> 0< 0BRANCH(1) NEGATE R> 0< 0BRANCH(4) NEGATE SWAP NEGATE SWAP)
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col(FM/MOD DUP >R 2DUP XOR 0< >R SM/REM OVER 0<> R> AND 0BRANCH(6) 1- SWAP R> + SWAP EXIT R> DROP)
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col(U/MOD 0 SWAP UM/MOD)
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col(/MOD >R S>D R> FM/MOD)
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col(*/MOD >R M* R> FM/MOD)
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// Splitting, joining, flipping the components of a number.
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col(WBSPLIT DUP H#FF AND SWAP 8 RSHIFT)
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col(LWSPLIT DUP H#FFFF AND SWAP H#10 RSHIFT)
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col(XLSPLIT DUP H#FFFFFFFF AND SWAP H#20 RSHIFT)
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col(LBSPLIT LWSPLIT >R WBSPLIT R> WBSPLIT)
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col(XWSPLIT XLSPLIT >R LWSPLIT R> LWSPLIT)
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col(XBSPLIT XLSPLIT >R LBSPLIT R> LBSPLIT)
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col(BWJOIN 8 LSHIFT OR)
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col(WLJOIN H#10 LSHIFT OR)
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col(BLJOIN BWJOIN >R BWJOIN R> WLJOIN)
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col(WBFLIP WBSPLIT SWAP BWJOIN)
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col(LWFLIP LWSPLIT SWAP WLJOIN)
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col(LXJOIN H#20 LSHIFT OR)
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col(XLFLIP XLSPLIT SWAP LXJOIN)
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col(LBFLIP LBSPLIT SWAP 2SWAP SWAP BLJOIN)
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col(WXJOIN WLJOIN >R WLJOIN R> LXJOIN)
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col(XWFLIP XWSPLIT SWAP 2SWAP SWAP WXJOIN)
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col(BXJOIN BLJOIN >R BLJOIN R> LXJOIN)
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col(XBFLIP XLSPLIT LBFLIP SWAP LBFLIP LXJOIN)
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// Aligning to cell size.
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col(ALIGNED /N 1- + /N NEGATE AND)
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// Counted loop stuff.
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col(J R> R> R> R@ SWAP >R SWAP >R SWAP >R)
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col(UNLOOP R> R> R> 2DROP >R)
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col(+! TUCK @ + SWAP !)
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col(OFF FALSE SWAP !)
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col(<W@ W@ DUP LIT(0x8000) >= 0BRANCH(3) LIT(0x10000) -)
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col(2@ DUP CELL+ @ SWAP @)
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col(2! DUP >R ! R> CELL+ !)
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col(WBFLIPS BOUNDS DO?DO(8) I W@ WBFLIP I W! /W DO+LOOP(-8))
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col(LWFLIPS BOUNDS DO?DO(8) I L@ LWFLIP I L! /L DO+LOOP(-8))
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col(LBFLIPS BOUNDS DO?DO(8) I L@ LBFLIP I L! /L DO+LOOP(-8))
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col(XBFLIPS BOUNDS DO?DO(8) I X@ XBFLIP I X! /X DO+LOOP(-8))
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col(XWFLIPS BOUNDS DO?DO(8) I X@ XWFLIP I X! /X DO+LOOP(-8))
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col(XLFLIPS BOUNDS DO?DO(8) I X@ XLFLIP I X! /X DO+LOOP(-8))
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col(BLANK LIT(0x20) FILL)
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col(ERASE LIT(0x00) FILL)
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// Exception handling.
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col(CATCH DEPTH >R CATCHER @ >R RDEPTH CATCHER ! EXECUTE R> CATCHER ! R> DROP 0)
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col(THROW ?DUP 0BRANCH(12) CATCHER @ RDEPTH! R> CATCHER ! R> SWAP >R DEPTH! DROP R>)
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col(TERMINAL TIB DOTO IB #TIB @ #IB ! 0 DOTO SOURCE-ID)
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col(TYPE BOUNDS DO?DO(5) I C@ EMIT DOLOOP(-5))
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col(LL-CR CARRET EMIT LINEFEED EMIT)
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col(SPACES 0 DO?DO(3) SPACE DOLOOP(-3))
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// Text manipulation.
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col(COUNT DUP CHAR+ SWAP C@)
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col(PACK DUP >R 1+ SWAP DUP R@ C! MOVE R>)
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col(UPC DUP LIT('a') LIT('z') BETWEEN 0BRANCH(3) LIT(0x20) - )
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col(LCC DUP LIT('A') LIT('Z') BETWEEN 0BRANCH(3) LIT(0x20) + )
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col(EXPECT ACCEPT SPAN !)
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col(REFILL SOURCE-ID 0= 0BRANCH(7) SOURCE EXPECT 0 >IN ! TRUE EXIT SOURCE-ID -1 = 0BRANCH(2) FALSE EXIT LIT(0x6502) THROW)
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col(DECIMAL D#10 BASE !)
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// Pictured numeric output.
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col(PAD HERE LIT(256) +)
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col(TODIGIT DUP LIT(9) > 0BRANCH(3) LIT(0x27) + LIT(0x30) +)
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col(MU/MOD DUP >R U/MOD R> SWAP >R UM/MOD R>)
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col(HOLD PAD DUP @ 1- TUCK SWAP ! C!)
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col(SIGN 0< 0BRANCH(3) LIT('-') HOLD)
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col(# BASE @ MU/MOD ROT TODIGIT HOLD)
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col(#S # 2DUP OR 0BRANCH(2) BRANCH(-7))
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col(#> 2DROP PAD DUP @ TUCK -)
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col((.) <# DUP >R ABS 0 #S R> SIGN #>)
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col(U# BASE @ U/MOD SWAP TODIGIT HOLD)
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col(U#S U# DUP 0BRANCH(2) BRANCH(-6))
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col(U#> DROP PAD DUP @ TUCK -)
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col(. (.) TYPE SPACE)
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col(U. (U.) TYPE SPACE)
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col(.R SWAP (.) ROT 2DUP < 0BRANCH(5) OVER - SPACES BRANCH(1) DROP TYPE)
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col(U.R SWAP (U.) ROT 2DUP < 0BRANCH(5) OVER - SPACES BRANCH(1) DROP TYPE)
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col(.D BASE @ SWAP DECIMAL . BASE !)
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col(.H BASE @ SWAP HEX . BASE !)
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col(.S DEPTH DUP 0< 0BRANCH(2) DROP EXIT 0 DO?DO(8) DEPTH I - 1- PICK . DOLOOP(-8))
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col(DIGIT OVER UPC DUP LIT('A') LIT('Z') BETWEEN 0BRANCH(3) LIT(7) - LIT(0x30) - DUP ROT 0 SWAP WITHIN 0BRANCH(4) NIP TRUE BRANCH(2) DROP FALSE)
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col(>NUMBER DUP 0= 0BRANCH(1) EXIT OVER C@ BASE @ DIGIT 0BRANCH(23) SWAP >R SWAP >R >R BASE @ U* SWAP BASE @ UM* ROT + R> 0 D+ R> CHAR+ R> 1- BRANCH(-35) DROP)
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col($NUMBER DUP 0= 0BRANCH(4) DROP DROP TRUE EXIT >R DUP >R C@ LIT('-') = DUP 0BRANCH(15) R> CHAR+ R> 1- DUP 0= 0BRANCH(5) DROP DROP DROP TRUE EXIT >R >R 0 0 R> R> >NUMBER NIP 0= 0BRANCH(7) DROP SWAP 0BRANCH(1) NEGATE FALSE EXIT DROP DROP DROP TRUE)
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// Data space allocation.
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col(ALLOT HERE + DOTO HERE)
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col(, HERE ! /N ALLOT)
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col(C, HERE C! /C ALLOT)
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col(W, HERE W! /W ALLOT)
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col(L, HERE L! /L ALLOT)
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col(X, HERE X! /X ALLOT)
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col(ALIGN HERE /N 1- AND 0BRANCH(4) 0 C, BRANCH(-10))
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col(PLACE 2DUP C! CHAR+ SWAP CHARS BOUNDS DO?DO(9) DUP C@ I C! CHAR+ 1 CHARS DO+LOOP(-9) DROP)
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col(STRING, HERE OVER 1+ CHARS ALLOT PLACE)
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// Every language needs a no-op.
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// Now it gets ugly: search-order and word-lisst infrastructure.
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raw(FORTH-WORDLIST DODOES _A(xt_NOOP+2+(8/sizeof(long))) _A(0) _A(0))
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// Engine initialisation will set this last cell to the xt of LASTWORD.
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// compilation dictionary
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raw(CURRENT DOVAL _A(xt_FORTH_X2d_WORDLIST+3+(16/sizeof(long))))
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// +7 for 32-bit, +5 for 64-bit
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col(LAST CURRENT CELL+)
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// for context dictionaries
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raw(SEARCH-ORDER DOVAR _A(xt_FORTH_X2d_WORDLIST+3+(16/sizeof(long))) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0))
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// +7 for 32-bit, +5 for 64-bit
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// for context dictionaries
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//raw(SEARCH-ORDER DOVAR _A(xt_FORTH_X2d_WORDLIST+3+(sizeof(" FORTH-WORDLIST")/sizeof(long))) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0) _A(0))
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// +7 for 32-bit, +5 for 64-bit
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raw(CONTEXT DOVAL _A(xt_SEARCH_X2d_ORDER+2+(16/sizeof(long))))
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//raw(CONTEXT DOVAL _A(xt_SEARCH_X2d_ORDER+6))
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// +6 for 32-bit, +4 for 64-bit
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// Dictionary structure.
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col(NAME> CHAR+ DUP C@ 1+ CHARS+ ALIGNED)
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col(LINK> LINK>NAME NAME>)
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col(NAME>STRING CHAR+ COUNT)
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// Creating word headers.
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col(HEADER ALIGN HERE LAST @ , LATEST ! 0 C, STRING, ALIGN)
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col(REVEAL LATEST @ LINK>NAME NAME>STRING (REVEAL) LATEST @ LAST !)
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// (find) ( str len head -- 0 | link )
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col(((FIND)) DUP 0BRANCH(15) >R 2DUP R@ LINK>NAME NAME>STRING STRING=CI 0BRANCH(3) 2DROP R> EXIT R> @ BRANCH(-18) 3DROP FALSE)
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col((FIND-ORDER) CONTEXT DUP >R SEARCH-ORDER U>= 0BRANCH(18) 2DUP R@ @ CELL+ @ (FIND) ?DUP 0BRANCH(5) NIP NIP R> DROP EXIT R> CELL- BRANCH(-24) R> 3DROP 0)
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col(($FIND) (FIND-ORDER) DUP 0BRANCH(6) LINK>NAME DUP NAME> SWAP C@ TRUE)
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col($FIND 2DUP ($FIND) 0BRANCH(6) DROP NIP NIP TRUE BRANCH(1) FALSE)
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col(IMMEDIATE? 'IMMEDIATE AND 0<>)
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col(IMMEDIATE LAST @ CELL+ DUP C@ 'IMMEDIATE OR SWAP C!)
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col(FINDCHAR SWAP 0 DO?DO(24) OVER I + C@ OVER DUP BL = 0BRANCH(3) <= BRANCH(1) = 0BRANCH(6) I UNLOOP NIP NIP TRUE EXIT DOLOOP(-24) DROP DROP FALSE)
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col(PARSE >R IB >IN @ + SPAN @ >IN @ - 2DUP R> FINDCHAR 0BRANCH(6) NIP DUP 1 + BRANCH(1) DUP >IN +!)
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col(SKIPWS IB SPAN @ DUP >IN @ > 0BRANCH(14) OVER >IN @ + C@ BL <= 0BRANCH(5) 1 >IN +! BRANCH(-20) DROP DROP)
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col(PARSE-WORD SKIPWS BL PARSE)
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// We reserved 0x1000 for the pockets. So we have 16 pockets a 0x100
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col(POCKET POCKETS WHICHPOCKET @ LIT(POCKETSIZE) * + WHICHPOCKET @ 1 + DUP LIT(NUMPOCKETS) = 0BRANCH(2) DROP 0 WHICHPOCKET !)
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col(WORD POCKET >R PARSE DUP R@ C! BOUNDS R> DUP 2SWAP DO?DO(7) CHAR+ I C@ OVER C! DOLOOP(-7) DROP)
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// Some simple parsing words.
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col(CHAR PARSE-WORD DROP C@)
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imm(( LIT(')') PARSE 2DROP)
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// Removing comments out of the code, the code from the backslash to the next \n is removed.
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// We need to start from cursor -1 (the backslash) to handle the case backslash+linefeed correctly 0x5c0a
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imm(\ >IN @ 1- >IN ! LINEFEED PARSE 2DROP)
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// The compiler infrastructure.
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col(] LIT(0x100) STATE !)
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col(?COMP STATE @ 0BRANCH(1) EXIT LIT(-134) THROW)
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col(: PARSE-WORD HEADER DOTICK DOCOL COMPILE, ])
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col(:NONAME ALIGN HERE DOTICK DOCOL COMPILE, ])
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imm(; ?COMP DOTICK SEMICOLON COMPILE, REVEAL [)
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// Compiling strings.
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imm(C" ?COMP LIT('"') PARSE DOTICK SLITERAL COMPILE, DUP C, BOUNDS DO?DO(5) I C@ C, DOLOOP(-5) ALIGN)
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imm(S" STATE @ 0BRANCH(5) C" DOTICK COUNT COMPILE, EXIT LIT('"') PARSE DUP >R POCKET DUP >R SWAP MOVE R> R>)
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imm(Z" S" 2DUP + 0 SWAP C! DROP)
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imm(." STATE @ 0BRANCH(5) S" DOTICK TYPE COMPILE, EXIT LIT('"') PARSE TYPE)
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imm(.( LIT(')') PARSE TYPE)
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col(COMPILE R> CELL+ DUP @ COMPILE, >R)
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col(+COMP STATE @ 1 STATE +! 0BRANCH(1) EXIT HERE THERE ! COMP-BUFFER DOTO HERE COMPILE DOCOL)
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col(-COMP -1 STATE +! STATE @ 0BRANCH(1) EXIT COMPILE EXIT THERE @ DOTO HERE COMP-BUFFER EXECUTE)
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col(RESOLVE-ORIG HERE OVER CELL+ - SWAP !)
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imm(AHEAD +COMP DOTICK DOBRANCH COMPILE, HERE 0 COMPILE,)
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imm(IF +COMP DOTICK DO0BRANCH COMPILE, HERE 0 COMPILE,)
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imm(THEN ?COMP RESOLVE-ORIG -COMP)
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imm(ELSE ?COMP DOTICK DOBRANCH COMPILE, HERE 0 COMPILE, SWAP RESOLVE-ORIG)
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imm(ENDCASE ?COMP DOTICK DROP COMPILE, ?DUP 0BRANCH(5) 1- SWAP THEN BRANCH(-8) -COMP)
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imm(OF ?COMP 1+ >R DOTICK OVER COMPILE, DOTICK = COMPILE, IF DOTICK DROP COMPILE, R>)
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imm(ENDOF ?COMP >R ELSE R>)
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col(RESOLVE-DEST HERE CELL+ - COMPILE,)
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imm(BEGIN +COMP HERE)
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imm(AGAIN ?COMP DOTICK DOBRANCH COMPILE, RESOLVE-DEST -COMP)
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imm(UNTIL ?COMP DOTICK DO0BRANCH COMPILE, RESOLVE-DEST -COMP)
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imm(WHILE ?COMP IF SWAP)
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imm(REPEAT ?COMP AGAIN THEN)
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col(RESOLVE-LOOP LEAVES @ ?DUP 0BRANCH(10) DUP @ SWAP HERE OVER - SWAP ! BRANCH(-13) HERE - COMPILE, LEAVES !)
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imm(DO +COMP LEAVES @ HERE DOTICK DODO COMPILE, 0 LEAVES !)
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imm(?DO +COMP LEAVES @ DOTICK DODO?DO COMPILE, HERE HERE LEAVES ! 0 COMPILE,)
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imm(LOOP ?COMP DOTICK DODOLOOP COMPILE, RESOLVE-LOOP -COMP)
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imm(+LOOP ?COMP DOTICK DODO+LOOP COMPILE, RESOLVE-LOOP -COMP)
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imm(LEAVE ?COMP DOTICK DODOLEAVE COMPILE, LEAVES @ HERE LEAVES ! COMPILE,)
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imm(?LEAVE ?COMP DOTICK DODO?LEAVE COMPILE, LEAVES @ HERE LEAVES ! COMPILE,)
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// Interpreter nesting.
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col(SAVE-SOURCE R> IB >R #IB @ >R SOURCE-ID >R SPAN @ >R >IN @ >R >R)
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col(RESTORE-SOURCE R> R> >IN ! R> SPAN ! R> DOTO SOURCE-ID R> #IB ! R> DOTO IB >R)
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str(ABORTED-STR "Aborted")
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str(EXCEPTION-STR "Exception #")
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str(UNKNOWN-STR "Undefined word")
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dfr(HW-EXCEPTION-HANDLER)
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col(SHOWSTACK -1 DOTO SHOW-STACK?)
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col(NOSHOWSTACK 0 DOTO SHOW-STACK?)
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col(PRINT-STACK SHOW-STACK? 0BRANCH(5) >R >R .S R> R> )
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col(PRINT-EXCEPTION DUP LIT(-99) = 0BRANCH(7) DOTICK UNKNOWN-STR COUNT TYPE CR DROP EXIT DUP LIT(0x100) = 0BRANCH(2) DROP EXIT HW-EXCEPTION-HANDLER )
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col(PRINT-STATUS SPACE DUP 0= 0BRANCH(5) PRINT-STACK DOTICK OK-STR BRANCH(7) DUP -1 = 0BRANCH(6) DOTICK ABORTED-STR COUNT TYPE BRANCH(10) DUP LIT(-2) = 0BRANCH(7) ABORT"-STR @ COUNT TYPE DROP BRANCH(1) PRINT-EXCEPTION CR)
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// The compiler and interpreter.
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col(COMPILE-WORD 2DUP ($FIND) 0BRANCH(10) IMMEDIATE? 0BRANCH(4) NIP NIP EXECUTE EXIT COMPILE, 2DROP EXIT 2DUP $NUMBER 0BRANCH(4) TYPE LIT(-99) THROW DOTICK DOLIT COMPILE, COMPILE, 2DROP)
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col(INTERPRET-WORD 2DUP ($FIND) 0BRANCH(5) DROP NIP NIP EXECUTE EXIT 2DUP $NUMBER 0BRANCH(4) TYPE LIT(-99) THROW >R 2DROP R>)
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col(INTERPRET 0 >IN ! PARSE-WORD DUP 0BRANCH(10) STATE @ 0BRANCH(3) COMPILE-WORD BRANCH(1) INTERPRET-WORD BRANCH(-14) 2DROP)
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// Evaluate, the one word to rule them all. It is evil, btw.
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col(EVALUATE SAVE-SOURCE -1 DOTO SOURCE-ID DUP #IB ! SPAN ! DOTO IB DOTICK INTERPRET CATCH RESTORE-SOURCE THROW)
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// Abort with a message.
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col(DOABORT" SWAP 0BRANCH(5) ABORT"-STR ! LIT(-2) THROW DROP)
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imm(ABORT" C" DOTICK DOABORT" COMPILE,)
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str(UNDEFINED-STR "undefined word ")
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col(SET-UNDEFINED-WORD POCKET >R DOTICK UNDEFINED-STR DUP C@ 1+ R@ SWAP MOVE R@ DUP C@ 1+ + SWAP DUP R@ C@ + R@ C! MOVE R>)
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col(' PARSE-WORD $FIND 0= 0BRANCH(4) SET-UNDEFINED-WORD TRUE SWAP DOABORT")
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// The outer interpreter.
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col(QUIT 0 RDEPTH! [ TERMINAL DEPTH . LIT('>') EMIT SPACE REFILL 0BRANCH(10) SPACE DOTICK INTERPRET CATCH DUP PRINT-STATUS 0BRANCH(-17) BRANCH(-23))
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// Reading and writing to/from file; including files.
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col(INCLUDED MAP-FILE 2DUP >R >R BOUNDS DO?DO(21) R> R@ SWAP >R R@ - R@ SWAP 2DUP LINEFEED FINDCHAR 0BRANCH(1) NIP DUP >R EVALUATE R> 1+ DO+LOOP(-21) R> R> UNMAP-FILE)
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col(INCLUDE PARSE-WORD INCLUDED)
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// CREATE ... DOES> ...
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col($CREATE HEADER DOTICK DODOES COMPILE, DOTICK NOOP CELL+ COMPILE, REVEAL)
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col(CREATE PARSE-WORD $CREATE)
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col(DODOES> R> CELL+ LATEST @ LINK> CELL+ !)
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imm(DOES> DOTICK DODOES> COMPILE,)
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col(CONSTANT PARSE-WORD HEADER DOTICK DOCON COMPILE, COMPILE, REVEAL)
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col(VALUE PARSE-WORD HEADER DOTICK DOVAL COMPILE, COMPILE, REVEAL)
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col(VARIABLE PARSE-WORD HEADER DOTICK DOVAR COMPILE, 0 COMPILE, REVEAL)
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col(BUFFER: PARSE-WORD HEADER DOTICK DOBUFFER: COMPILE, ALLOT REVEAL)
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col(DEFER PARSE-WORD HEADER DOTICK DODEFER COMPILE, DOTICK ABORT COMPILE, REVEAL)
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col(ALIAS PARSE-WORD HEADER DOTICK DOALIAS COMPILE, ' COMPILE, REVEAL)
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col(FIELD PARSE-WORD HEADER DOTICK DOFIELD COMPILE, OVER , + REVEAL)
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// Words with (mostly) non-standard compilation behaviour.
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imm(LITERAL DOTICK DOLIT COMPILE, COMPILE,)
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imm([COMPILE] ' COMPILE,)
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imm(POSTPONE PARSE-WORD 2DUP ($FIND) 0= 0BRANCH(4) SET-UNDEFINED-WORD TRUE SWAP DOABORT" IMMEDIATE? 0= 0BRANCH(6) DOTICK DOTICK COMPILE, COMPILE, DOTICK COMPILE, COMPILE, 2DROP)
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imm([CHAR] CHAR LITERAL)
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imm(['] ' DOTICK DOTICK COMPILE, COMPILE,)
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col(FIND DUP COUNT ($FIND) 0BRANCH(9) ROT DROP TRUE SWAP IMMEDIATE? 0BRANCH(1) NEGATE EXIT FALSE EXIT)
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// Accessing data in CREATE'd words.
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imm(TO ' STATE @ 0BRANCH(5) DOTICK DOTO COMPILE, COMPILE, EXIT CELL+ !)
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col(BEHAVIOR CELL+ @)
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// Making words recursive.
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imm(RECURSIVE REVEAL)
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imm(RECURSE LATEST @ LINK> COMPILE,)
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imm(d# PARSE-WORD BASE @ >R DECIMAL EVALUATE R> BASE !)
541
imm(h# PARSE-WORD BASE @ >R HEX EVALUATE R> BASE !)
542
imm(o# PARSE-WORD BASE @ >R OCTAL EVALUATE R> BASE !)