On Thu, Oct 17, 2013 at 01:02:17PM +0200, Paolo Bonzini wrote:
> Il 17/10/2013 12:58, Gleb Natapov ha scritto:
> >>> > > @@ -143,14 +143,14 @@ static inline int rtc_in(u8 reg)
> >>> > > {
> >>> > > u8 x = reg;
> >>> > > asm volatile("outb %b1, $0x70; inb $0x71, %b0"
> >>> > > -
On Thu, Oct 17, 2013 at 12:53:30PM +0200, Paolo Bonzini wrote:
> Il 16/10/2013 21:46, Michael S. Tsirkin ha scritto:
> > Old GCC didn't let you reference variable by
> > number if it is listed with a specific register
> > constraint, on the assumption you can just
> > use the register name explicit
Il 17/10/2013 12:58, Gleb Natapov ha scritto:
>>> > > @@ -143,14 +143,14 @@ static inline int rtc_in(u8 reg)
>>> > > {
>>> > > u8 x = reg;
>>> > > asm volatile("outb %b1, $0x70; inb $0x71, %b0"
>>> > > -: "+a"(x) : "0"(x));
>>> > > +: "=a"(x) : "0"(x));
>>
On Thu, Oct 17, 2013 at 12:55:16PM +0200, Paolo Bonzini wrote:
> Il 17/10/2013 08:27, Gleb Natapov ha scritto:
> > On Wed, Oct 16, 2013 at 10:46:53PM +0300, Michael S. Tsirkin wrote:
> >> Old GCC didn't let you reference variable by
> >> number if it is listed with a specific register
> >> constrai
Il 17/10/2013 08:27, Gleb Natapov ha scritto:
> On Wed, Oct 16, 2013 at 10:46:53PM +0300, Michael S. Tsirkin wrote:
>> Old GCC didn't let you reference variable by
>> number if it is listed with a specific register
>> constraint, on the assumption you can just
>> use the register name explicitly.
>
Il 16/10/2013 21:46, Michael S. Tsirkin ha scritto:
> Old GCC didn't let you reference variable by
> number if it is listed with a specific register
> constraint, on the assumption you can just
> use the register name explicitly.
Tell us the truth, you made this up. :) Who doesn't do that for inv
On Thu, Oct 17, 2013 at 12:44:46PM +0300, Michael S. Tsirkin wrote:
> On Thu, Oct 17, 2013 at 12:33:39PM +0300, Gleb Natapov wrote:
> > > > It just papers over the problem. Compiler should either complain that it
> > > > does not know what %w0 or complain that variable length does not match
> > > >
On Thu, Oct 17, 2013 at 12:33:39PM +0300, Gleb Natapov wrote:
> > > It just papers over the problem. Compiler should either complain that it
> > > does not know what %w0 or complain that variable length does not match
> > > assembly
> >
> > Of course it can't. Compiler does not parse assembly at a
On Thu, Oct 17, 2013 at 12:28:58PM +0300, Michael S. Tsirkin wrote:
> On Thu, Oct 17, 2013 at 11:34:41AM +0300, Gleb Natapov wrote:
> > On Thu, Oct 17, 2013 at 11:27:37AM +0300, Michael S. Tsirkin wrote:
> > > On Thu, Oct 17, 2013 at 11:20:27AM +0300, Gleb Natapov wrote:
> > > > On Thu, Oct 17, 201
On Thu, Oct 17, 2013 at 11:34:41AM +0300, Gleb Natapov wrote:
> On Thu, Oct 17, 2013 at 11:27:37AM +0300, Michael S. Tsirkin wrote:
> > On Thu, Oct 17, 2013 at 11:20:27AM +0300, Gleb Natapov wrote:
> > > On Thu, Oct 17, 2013 at 11:12:31AM +0300, Michael S. Tsirkin wrote:
> > > > On Thu, Oct 17, 201
On Thu, Oct 17, 2013 at 11:27:37AM +0300, Michael S. Tsirkin wrote:
> On Thu, Oct 17, 2013 at 11:20:27AM +0300, Gleb Natapov wrote:
> > On Thu, Oct 17, 2013 at 11:12:31AM +0300, Michael S. Tsirkin wrote:
> > > On Thu, Oct 17, 2013 at 09:27:51AM +0300, Gleb Natapov wrote:
> > > > On Wed, Oct 16, 201
On Thu, Oct 17, 2013 at 09:27:51AM +0300, Gleb Natapov wrote:
> On Wed, Oct 16, 2013 at 10:46:53PM +0300, Michael S. Tsirkin wrote:
> > Old GCC didn't let you reference variable by
> > number if it is listed with a specific register
> > constraint, on the assumption you can just
> > use the registe
On Thu, Oct 17, 2013 at 11:20:27AM +0300, Gleb Natapov wrote:
> On Thu, Oct 17, 2013 at 11:12:31AM +0300, Michael S. Tsirkin wrote:
> > On Thu, Oct 17, 2013 at 09:27:51AM +0300, Gleb Natapov wrote:
> > > On Wed, Oct 16, 2013 at 10:46:53PM +0300, Michael S. Tsirkin wrote:
> > > > Old GCC didn't let
On Thu, Oct 17, 2013 at 11:12:31AM +0300, Michael S. Tsirkin wrote:
> On Thu, Oct 17, 2013 at 09:27:51AM +0300, Gleb Natapov wrote:
> > On Wed, Oct 16, 2013 at 10:46:53PM +0300, Michael S. Tsirkin wrote:
> > > Old GCC didn't let you reference variable by
> > > number if it is listed with a specific
On Wed, Oct 16, 2013 at 10:46:53PM +0300, Michael S. Tsirkin wrote:
> Old GCC didn't let you reference variable by
> number if it is listed with a specific register
> constraint, on the assumption you can just
> use the register name explicitly.
>
> Build fails with errors like this:
> a.c:6: erro
Old GCC didn't let you reference variable by
number if it is listed with a specific register
constraint, on the assumption you can just
use the register name explicitly.
Build fails with errors like this:
a.c:6: error: invalid 'asm': invalid operand code 'd'
To fix, let's just use %eax %al etc.
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