Re: How to move two valuables to x86 CPU register ebx, ecx by using AT&A inline asm.

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[root@viral temp_c_files]# gcc foo.c
[root@viral temp_c_files]# cat foo.c
#include <stdio.h>
int main()
{
       unsigned int val = 10;
       unsigned int tmp = 5;

       __asm__ volatile ("movl (%0), %%ebx\n"
         "movl (%1), %%ecx\n"
         : : "r"(val), "r"(tmp) );
}

[root@viral temp_c_files]#
Thanks,
Viral Mehta,
Embedded Software Engineer,
Tel. No. 91 79 26563705, Ext. 423
www.einfochips.com <http://www.einfochips.com>
Prepare and Prevent rather than Repair and Repent


Johnny Hung wrote:
It doesn't works. :(

2009/11/19 Viral Mehta <viral.mehta@xxxxxxxxxxxxxx>:
How about putting \n at the end ?

Just try out,

__asm__ volatile ("movl %0, %%ebx\n"
        "movl %1, %%ecx\n"




Thanks,
Viral Mehta,
Embedded Software Engineer,
Tel. No. 91 79 26563705, Ext. 423
www.einfochips.com <http://www.einfochips.com>
Prepare and Prevent rather than Repair and Repent


Johnny Hung wrote:
Hi All:
   I want to move two local valuables to x86 arch CPU ebx, ecx
register and do outb cpu instruction by using AT&A inline asm in
kernel driver.  The following code was I wrote but gcc report syntax
error:
==
   unsigned int val = 10;
   unsigned int tmp = 5;
   ....
   __asm__ volatile ("movl %0, %%ebx"
         "movl %1, %%ecx"
         "outb $0x27, $0xb2"
         :
         :"r"(val), "r"(tmp)
         :"%ebx", "%ecx"
  );

Does anyone can point me out. Any reply is appreciated.

BRs, H. Johnny

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