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Diff for /gforth/kernel/cond.fs between versions 1.6 and 1.20

version 1.6, 1999/05/10 13:58:05 version 1.20, 2007/10/29 15:56:31
Line 1 Line 1
 \ Structural Conditionals                              12dec92py  \ Structural Conditionals                              12dec92py
   
 \ Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.  \ Copyright (C) 1995,1996,1997,2000,2003,2004 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
Line 16 Line 16
   
 \ You should have received a copy of the GNU General Public License  \ You should have received a copy of the GNU General Public License
 \ along with this program; if not, write to the Free Software  \ along with this program; if not, write to the Free Software
 \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   
 here 0 , \ just a dummy, the real value of locals-list is patched into it in glocals.fs  here 0 , \ just a dummy, the real value of locals-list is patched into it in glocals.fs
 AConstant locals-list \ acts like a variable that contains  AConstant locals-list \ acts like a variable that contains
Line 80  variable backedge-locals Line 80  variable backedge-locals
   
 3 constant cs-item-size  3 constant cs-item-size
   
 : CS-PICK ( ... u -- ... destu ) \ tools-ext  : CS-PICK ( ... u -- ... destu ) \ tools-ext c-s-pick
  1+ cs-item-size * 1- >r   1+ cs-item-size * 1- >r
  r@ pick  r@ pick  r@ pick   r@ pick  r@ pick  r@ pick
  rdrop   rdrop
  dup non-orig? ;   dup non-orig? ;
   
 : CS-ROLL ( destu/origu .. dest0/orig0 u -- .. dest0/orig0 destu/origu ) \ tools-ext  : CS-ROLL ( destu/origu .. dest0/orig0 u -- .. dest0/orig0 destu/origu ) \ tools-ext c-s-roll
  1+ cs-item-size * 1- >r   1+ cs-item-size * 1- >r
  r@ roll r@ roll r@ roll   r@ roll r@ roll r@ roll
  rdrop   rdrop
Line 105  variable backedge-locals Line 105  variable backedge-locals
   
 \ Structural Conditionals                              12dec92py  \ Structural Conditionals                              12dec92py
   
   defer other-control-flow ( -- )
   \ hook for control-flow stuff that's not handled by begin-like etc.
   
 : ?struc      ( flag -- )       abort" unstructured " ;  : ?struc      ( flag -- )       abort" unstructured " ;
 : sys?        ( sys -- )        dup 0= ?struc ;  : sys?        ( sys -- )        dup 0= ?struc ;
 : >mark ( -- orig )  : >mark ( -- orig )
  cs-push-orig 0 , ;   cs-push-orig 0 , other-control-flow ;
 : >resolve    ( addr -- )        here over - swap ! ;  : >resolve    ( addr -- )
 : <resolve    ( addr -- )        here - , ;      here swap !
       basic-block-end ;
   : <resolve    ( addr -- )        , ;
   
 : BUT  : BUT
     1 cs-roll ;                      immediate restrict      1 cs-roll ;                      immediate restrict
Line 146  immediate restrict Line 151  immediate restrict
 \ people who have not been brought up with Forth (or who have been  \ people who have not been brought up with Forth (or who have been
 \ brought up with fig-Forth).  \ brought up with fig-Forth).
   
 : ELSE ( compilation orig1 -- orig2 ; run-time f -- ) \ core  : ELSE ( compilation orig1 -- orig2 ; run-time -- ) \ core
     POSTPONE ahead      POSTPONE ahead
     1 cs-roll      1 cs-roll
     POSTPONE then ; immediate restrict      POSTPONE then ; immediate restrict
Line 155  Defer begin-like ( -- ) Line 160  Defer begin-like ( -- )
 ' noop IS begin-like  ' noop IS begin-like
   
 : BEGIN ( compilation -- dest ; run-time -- ) \ core  : BEGIN ( compilation -- dest ; run-time -- ) \ core
     begin-like cs-push-part dest ; immediate restrict      begin-like cs-push-part dest
       basic-block-end ; immediate restrict
   
 Defer again-like ( dest -- addr )  Defer again-like ( dest -- addr )
 ' nip IS again-like  ' nip IS again-like
Line 163  Defer again-like ( dest -- addr ) Line 169  Defer again-like ( dest -- addr )
 : AGAIN ( compilation dest -- ; run-time -- ) \ core-ext  : AGAIN ( compilation dest -- ; run-time -- ) \ core-ext
     dest? again-like  POSTPONE branch  <resolve ; immediate restrict      dest? again-like  POSTPONE branch  <resolve ; immediate restrict
   
 Defer until-like  Defer until-like ( list addr xt1 xt2 -- )
 : until, ( list addr xt1 xt2 -- )  drop compile, <resolve drop ;  :noname ( list addr xt1 xt2 -- )
 ' until, IS until-like      drop compile, <resolve drop ;
   IS until-like
   
 : UNTIL ( compilation dest -- ; run-time f -- ) \ core  : UNTIL ( compilation dest -- ; run-time f -- ) \ core
     dest? ['] ?branch ['] ?branch-lp+!# until-like ; immediate restrict      dest? ['] ?branch ['] ?branch-lp+!# until-like ; immediate restrict
Line 298  Defer exit-like ( -- ) Line 305  Defer exit-like ( -- )
 ' noop IS exit-like  ' noop IS exit-like
   
 : EXIT ( compilation -- ; run-time nest-sys -- ) \ core  : EXIT ( compilation -- ; run-time nest-sys -- ) \ core
     \G Return to the calling definition; usually used as a way of  \G Return to the calling definition; usually used as a way of
     \G forcing an early return from a definition. Before  \G forcing an early return from a definition. Before
     \G @code{EXIT}ing you must clean up the return stack and  \G @code{EXIT}ing you must clean up the return stack and
     \G @code{UNLOOP} any outstanding @code{?DO}...@code{LOOP}s.  \G @code{UNLOOP} any outstanding @code{?DO}...@code{LOOP}s.
     exit-like      exit-like
     POSTPONE ;s      POSTPONE ;s
       basic-block-end
     POSTPONE unreachable ; immediate restrict      POSTPONE unreachable ; immediate restrict
   
 : ?EXIT ( -- ) ( compilation -- ; run-time nest-sys f -- | nest-sys ) \ gforth  : ?EXIT ( -- ) ( compilation -- ; run-time nest-sys f -- | nest-sys ) \ gforth
Removed from v.1.6  
changed lines
  Added in v.1.20

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