[Bug binutils/19159] New: GNURL78:Incorrect disassembler output generated by objdump for base addressing using DE register.

[vinay.g at kpit dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=19159

            Bug ID: 19159
           Summary: GNURL78:Incorrect disassembler output generated by
                    objdump for base addressing using DE register.
           Product: binutils
           Version: 2.25
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: vinay.g at kpit dot com
  Target Milestone: ---

The RL78 toolchain does not generate correct instructions with below testcase.
The instruction generation in the list file is as expected. However, the
objdump shows incorrect disassembly being generated. For index addressing
instructions the list file displays "a, [de+0]", while the object dump shows
only "a, [de]" -> Here is "+ 0" is omitted by the toolchain.

Below testcase is for 'mov' and 'movw' instructions. Similar behaviour is also
observed with 'xch' instruction.

// test.s
.text
mov a, [de]
mov a, [de + 0]
mov a, [de + 1]
mov [de], a
mov [de + 0], a
mov [de + 1], a
movw ax, [de]
movw ax, [de + 0]
movw ax, [de + 1]
.end

$rl78-elf-as test.s -o test.o -aln=test.lst
$rl78-elf-objdump -d test.o

00000000 <.text>:
   0:   89        mov     a, [de]
   1:   8a 00     mov     a, [de]    ---> expected "mov a, [de+0]"
   3:   8a 01     mov     a, [de+1]
   5:   99        mov     [de], a
   6:   9a 00     mov     [de], a    ---> expected "mov  [de+0], a"
   8:   9a 01     mov     [de+1], a
   a:   a9        movw    ax, [de]
   b:   aa 00     movw    ax, [de]   ---> expected "movw  ax, [de+0]" 
   d:   aa 01     movw    ax, [de+1]

-- 
You are receiving this mail because:
You are on the CC list for the bug.