On Tue, Mar 05, 2013 at 03:20:57PM -0800, H. Peter Anvin wrote:
On 03/04/2013 03:58 PM, Kevin O'Connor wrote:
On Mon, Mar 04, 2013 at 04:15:51PM +0100, Paul Menzel wrote:
to build SeaBIOS, Clang throws the following errors.
In file included from src/ata.c:9: src/ioport.h:126:18: error: invalid operand for instruction asm volatile("rep outsw %%es:(%%esi), (%%dx)" ^
I'm not familiar with Clang, but I don't see anything wrong with this particular assembler statement. Is this the only thing Clang has issues with?
Wouldn't simply "es rep outsw" be better? The operands are implicit anyway, except for the source segment override.
I kind of prefer to be explicit with the source operands (for documentation purposes). Otherwise, it's not really a big deal. Paul, does Clang prefer "es rep outsw"?