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Diff for /gforth/arch/mips/disasm.fs between versions 1.5 and 1.8

version 1.5, 2000/06/02 19:20:19 version 1.8, 2000/06/03 10:06:30
Line 20 Line 20
   
 \ this disassembler is based on data from the R4400 manual  \ this disassembler is based on data from the R4400 manual
 \ http://www.mips.com/Documentation/R4400_Uman_book_Ed2.pdf, in  \ http://www.mips.com/Documentation/R4400_Uman_book_Ed2.pdf, in
 \ particular pages A3,A181,A182 (offset 468 pages in xpdf).  \ particular pages A3, A181, A182 (p. 471, 649, 650 in xpdf).
 \ it is limited to the R3000 (MIPS-I) architecture, though.  \ it is limited to the R3000 (MIPS-I) architecture, though.
   
   \ test this with
   \ gforth arch/mips/disasm.fs -e "here" arch/mips/testdisasm.fs -e "here over - disasm-dump bye" |sed 's/([^)]*) //'|diff -u - arch/mips/testasm.fs
   
   get-current
   vocabulary disassembler
   also disassembler definitions
   
 \ instruction fields  \ instruction fields
   
 : disasm-op ( w -- u )  : disasm-op ( w -- u )
Line 55 Line 62
   
 : disasm-relative ( addr n -- w )  : disasm-relative ( addr n -- w )
     \ compute printable form of relative address n relative to addr      \ compute printable form of relative address n relative to addr
     nip ( + ) ;      2 lshift nip ( + ) ;
   
 \ decode tables  \ decode tables
   
Line 80  $40 disasm-table cp0-tab-entry     \ COP Line 87  $40 disasm-table cp0-tab-entry     \ COP
   
 \ disassembler central decode cascade  \ disassembler central decode cascade
   
   dup set-current
   
 : disasm-inst ( addr w -- )  : disasm-inst ( addr w -- )
     \G disassemble instruction w at addr (addr is used for computing      \G disassemble instruction w at addr (addr is used for computing
     \G branch targets)      \G branch targets)
Line 91  $40 disasm-table cp0-tab-entry     \ COP Line 100  $40 disasm-table cp0-tab-entry     \ COP
         cr ." ( " i hex. ." ) " i i @ disasm-inst          cr ." ( " i hex. ." ) " i i @ disasm-inst
         1 cells +loop ;          1 cells +loop ;
   
   definitions
   
 : disasm-special ( addr w -- )  : disasm-special ( addr w -- )
     \ disassemble inst with opcode special      \ disassemble inst with opcode special
     dup disasm-funct funct-tab-entry @ execute ;      dup disasm-funct funct-tab-entry @ execute ;
Line 128  $40 disasm-table cp0-tab-entry     \ COP Line 139  $40 disasm-table cp0-tab-entry     \ COP
   
 : disasm-J-target ( addr w -- )  : disasm-J-target ( addr w -- )
     \ print jump target      \ print jump target
     $3ffffff and swap $fc000000 and or hex. ;      2 lshift $0fffffff and swap $f0000000 and or hex. ;
   
 : disasm-I-rs,rt,imm ( addr w -- )  : disasm-I-rs,rt,imm ( addr w -- )
     dup disasm-rs .      dup disasm-rs .
Line 266  does> ( addr w -- ) Line 277  does> ( addr w -- )
     drop nip asm-copz-imm1 ;      drop nip asm-copz-imm1 ;
   
 include ./insts.fs  include ./insts.fs
   
   previous set-current
Removed from v.1.5  
changed lines
  Added in v.1.8

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