this is interesting.... from
http://www.nongnu.org/avr-libc/user-manual/inline_asm.html it seemed to mean "read-write"? and perhaps someone should update this: http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html as I cannot find any such feature mentioned as well. On Sat, Nov 14, 2009 at 11:15 AM, dinesh bhaskar <[email protected]> wrote: > Hello all, > > can somebody explain me the following assembly syntax, this I have > seen in Linux kernel code. > > asm volatile("int $0x16" > : "+a" (ax), "+b" (bx) > : : "ecx", "edx", "esi", "edi"); > > I did not understand :"+a" mean. what does "+" tell there? > Generally we use "=a", indicating the output operands and other > registers are indicated as clobbered registeres. > > > TIA > dinesh > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to [email protected] > Please read the FAQ at http://kernelnewbies.org/FAQ > > -- Regards, Peter Teoh
