--- gforth/arch/alpha/disasm.fs	1999/10/13 13:00:08	1.2
+++ gforth/arch/alpha/disasm.fs	2007/12/31 18:40:25	1.8
@@ -1,18 +1,42 @@
-
-\ bernd thallner 9725890 e881
 \ disassembler in forth for alpha
 
+\ Copyright (C) 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 3
+\ 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, see http://www.gnu.org/licenses/.
+
+\ contributed by Bernd Thallner
+
 \ util
 
-: h@ ( addr -- n )  \ 32 bit fetch
-dup dup aligned = if
-  @
-  $00000000ffffffff and
-else
-  4 - @
-  $20 rshift
-endif
-;
+\ require asm.fs
+
+\  : h@ ( addr -- n )  \ 32 bit fetch
+\  dup dup aligned = if
+\    @
+\    $00000000ffffffff and
+\  else
+\    4 - @
+\    $20 rshift
+\  endif
+\  ;
+
+also assembler
+vocabulary disassembler
+get-current
+also disassembler definitions
 
 create string_table
 1000 allot
@@ -257,10 +281,10 @@ create decode_code
   print_string drop
 ;
 
-: decode_Bra ( instruction tbentry -- )
+: decode_Bra ( addr instruction tbentry -- addr )
   swap
   dup $03e00000 and 21 rshift decode_register
-  $001fffff and .
+  $001fffff and 2* 2* 2 pick + 4 + hex.
   print_string
 ;
 
@@ -282,7 +306,7 @@ create decode_code
 : decode_Mem ( instruction tbentry -- )
   swap
   dup $03e00000 and 21 rshift decode_register
-  dup $0000ffff and .
+  dup $0000ffff and dup 15 rshift negate 15 lshift or .
   $001f0000 and 16 rshift decode_register
   print_string
 ;
@@ -415,7 +439,9 @@ create opcode_table
 
 drop \ string_table end
 
-: decode_inst ( n -- )  \ instruction decoder
+set-current
+
+: disasm-inst ( addr n -- addr )  \ instruction decoder
   dup $fc000000 and
   26 rshift cells
   opcode_table +
@@ -424,13 +450,15 @@ drop \ string_table end
   $2c emit cr
 ;
 
-: disasm ( addr n -- )  \ disassembler
-cr 0
-?do
-  dup h@
-  over $28 emit space . $29 emit space
-  decode_inst
-  4 +
-loop
-drop
-;
+: disasm ( addr u -- )  \ gforth
+    \G disassemble u aus starting at addr
+    cr bounds
+    u+do
+	." ( " i hex. ." ) "
+	i i h@ disasm-inst drop
+	4
+    +loop ;
+
+' disasm is discode
+
+previous previous