Feature request: inline assembly clobbering

[fgsoftware1]

No description provided.

[lerno]

Do you have any suggested syntax?

[fgsoftware1]

Do you have any suggested syntax?

not at all but here goes some:

uint cr0;

asm
{
   "movl %0, $cr0 "
}(eax);

another thing i though was explicit input/output operands maybe using attributes style?

[lerno]

Umm.. did you test the asm syntax yet?

[fgsoftware1]

Umm.. did you test the asm syntax yet?

i haven't figure out how to do blocks and i think processing asm blocks at the end is a bad idea in some cases like:

u32 cr0;
    asm volatile ("mov %%cr0, %0" : "=r" (cr0));
    cr0 |= 1 << 31;
    asm volatile ("mov %0, %%cr0" : : "r" (cr0)); 

[fgsoftware1]

Umm.. did you test the asm syntax yet?

i haven't figure out how to do blocks and i think processing asm blocks at the end is a bad idea in some cases like:

u32 cr0;
asm volatile ("mov %%cr0, %0" : "=r" (cr0));
cr0 |= 1 << 31;
asm volatile ("mov %0, %%cr0" : : "r" (cr0));

this is an example in C

[lerno]

The way asm works in C3 is like:

int x;
asm
{
  in $eax, 3;
  in $ax, $dx;
  incb $al;
  incl [&x];
  ...
}

A clobber would perhaps look like

asm
{
  @invalidate($eax);
  @invalidate(mem);
}

[fgsoftware1]

The way asm works in C3 is like:

int x;
asm
{
in $eax, 3;
in $ax, $dx;
incb $al;
incl [&x];
...
}

A clobber would perhaps look like

asm
{
@invalidate($eax);
@invalidate(mem);
}

yeah that looks nice