GCC and asm()

[Spike]

What's wrong with this:

ULONG CPUID_Result=0;
asm ("movl $1,%%eax;cpuid; "
:"=a"(CPUID_Res ult)
: //Ingen input!
:"%eax","%ebx", "%ecx","%ed x");

All I want to do is call CPUID with EAX=1 and have to result stored in
CPUID_Result!

Once again TIA!

[Emmanuel Delahaye]

Re: GCC and asm()

Spike wrote on 22/12/04 :[color=blue]
> What's wrong with this:
>
> ULONG CPUID_Result=0;
> asm ("movl $1,%%eax;cpuid; "
> :"=a"(CPUID_Res ult)
> : //Ingen input!
> :"%eax","%ebx", "%ecx","%ed x");
>
> All I want to do is call CPUID with EAX=1 and have to result stored in
> CPUID_Result![/color]

You are off-topic on clc.

Are you aware that asm in gcc is AT&T style (destination and source are
reversed and other twisted things...)

Details on a gcc forum where you question belongs to.

news:gnu.gcc.he lp

--
Emmanuel
The C-FAQ: http://www.eskimo.com/~scs/C-faq/faq.html
The C-library: http://www.dinkumware.com/refxc.html

"Clearly your code does not meet the original spec."
"You are sentenced to 30 lashes with a wet noodle."
-- Jerry Coffin in a.l.c.c++

[Default User]

Re: GCC and asm()

Spike wrote:
[color=blue]
> Once again TIA![/color]

Once again, gnu.gcc.help





Brian

[Michael Mair]

Re: GCC and asm()


Spike wrote:[color=blue]
> What's wrong with this:
>
> ULONG CPUID_Result=0;
> asm ("movl $1,%%eax;cpuid; "
> :"=a"(CPUID_Res ult)
> : //Ingen input!
> :"%eax","%ebx", "%ecx","%ed x");[/color]

You did not ask this question in gnu.gcc.* (if in doubt, use
gnu.gcc.help)

-Michael
--
E-Mail: Mine is a gmx dot de address.