x86: fix CMPXCHG8B special case when disallowing q suffix outside of 64-bit mode

[H.J. Lu]

On Wed, Mar 24, 2021 at 6:59 AM Jan Beulich <jbeulich@suse.com> wrote:
>
> In match_template() i.tm hasn't been filled yet, so it is necessarily t
> which needs checking. This is only a latent issue as no other templates
> with the same base_opcode have an extension_opcode of 1.
>
> gas/
> 2021-03-XX  Jan Beulich  <jbeulich@suse.com>
>
>         * config/tc-i386.c (match_template): Use t instead of i.tm.
>
> --- a/gas/config/tc-i386.c
> +++ b/gas/config/tc-i386.c
> @@ -6290,7 +6290,7 @@ match_template (char mnem_suffix)
>        if (((i.suffix == QWORD_MNEM_SUFFIX
>             && flag_code != CODE_64BIT
>             && !(t->base_opcode == 0xfc7
> -                && i.tm.opcode_modifier.opcodeprefix == PREFIX_NONE
> +                && t->opcode_modifier.opcodeprefix == PREFIX_NONE
>                  && t->extension_opcode == 1) /* cmpxchg8b */)
>            || (i.suffix == LONG_MNEM_SUFFIX
>                && !cpu_arch_flags.bitfield.cpui386))

OK.  Thanks.

-- 
H.J.