[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Bug binutils/13571] New: objdump incorrectly disassembles 'movnti' as u

From: address@hidden
Subject: [Bug binutils/13571] New: objdump incorrectly disassembles 'movnti' as using 'QWORD PTR'
Date: Fri, 06 Jan 2012 19:19:48 +0000


             Bug #: 13571
           Summary: objdump incorrectly disassembles 'movnti' as using
                    'QWORD PTR'
           Product: binutils
           Version: 2.23 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
        AssignedTo: address@hidden
        ReportedBy: address@hidden
    Classification: Unclassified

"objdump -M intel -d" produces the following disassembly for x86-32:

   0:    0f c3 00                 movnti QWORD PTR [eax],eax

This should be "DWORD PTR" rather than "QWORD PTR".

For comparison, the assembler gets this right and accepts "DWORD PTR" but not

$ cat binutils_bug.S
.intel_syntax noprefix
movnti DWORD PTR [eax], eax
movnti QWORD PTR [eax], eax
$ as --32 binutils_bug.S -o binutils_bug.o
binutils_bug.S: Assembler messages:
binutils_bug.S:3: Error: ambiguous operand size or operands invalid for

The AMD manual specifies the instruction as follows:

MOVNTI mem32, reg32  0F C3 /r 
MOVNTI mem64, reg64  0F C3 /r 

This happens with binutils 2.20.1 and with HEAD (as of today).

Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]