GAS/i386/Linux: refuses 64-bit MMX memory ops in Intel syntax

[Haakon Riiser]

Take the following simple example (based on output from GCC 3.1):

# intel.s ####################################################################
        .intel_syntax
        .text
        .align 2
.globl main
        .type   main,@function
main:
        movq    QWORD PTR [%esp], %mm0
        xor     %eax, %eax
        ret
##############################################################################

Running it through the GNU assembler:

  $ as intel.s
  intel.s: Assembler messages:
  intel.s:7: Error: 64bit operations available only in 64bit modes.

  $ as --64 intel.s
  Assembler messages:
  Fatal error: No compiled in support for x86_64

The same instructions work fine in AT&T syntax.


Version info follows:

  $ uname -a
  Linux s 2.4.18 #2 Thu Jun 6 00:23:32 CEST 2002 i686 unknown

  $ as --version
  GNU assembler 2.12.90.0.9 20020526
  Copyright 2002 Free Software Foundation, Inc.
  This program is free software; you may redistribute it under the terms of
  the GNU General Public License.  This program has absolutely no warranty.
  This assembler was configured for a target of `i386-slackware-linux'.

Also verified with 

  GNU assembler 2.11.90.0.8
  Copyright 2001 Free Software Foundation, Inc.
  This program is free software; you may redistribute it under the terms of
  the GNU General Public License.  This program has absolutely no warranty.
  This assembler was configured for a target of `i386-redhat-linux'.

-- 
 Haakon