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I've disabled this piece of code since it's what's

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hosing syscons. Doesn anyone know anything about this
or can we just delete it now?

/*
 * This roundabout method of returning a u_char helps stop gcc-1.40 from
 * generating unnecessary movzbl's.
 */
#ifdef disable_for_gcc-2_6_0
#define inb(port)       ((u_char) u_int_inb(port))
#endif

static inline u_int
u_int_inb(u_int port)
{
        u_char  data;
        /*
         * We use %%dx and not %1 here because i/o is done at %dx and
not at
         * %edx, while gcc-2.2.2 generates inferior code (movw instead
of movl)
         * if we tell it to load (u_short) port.
         */
        __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
        return data;
}

Reviewed by:
Submitted by:
This commit is contained in:
paul 1994-08-23 11:57:19 +00:00
parent 8969df1ef1
commit 42b0369dee
2 changed files with 6 additions and 2 deletions
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4
sys/amd64/include/cpufunc.h
View File

@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: cpufunc.h,v 1.16 1994/08/13 03:49:49 wollman Exp $
* $Id: cpufunc.h,v 1.17 1994/08/18 22:34:46 wollman Exp $
*/
/*
@ -74,7 +74,9 @@ enable_intr(void)
* This roundabout method of returning a u_char helps stop gcc-1.40 from
* generating unnecessary movzbl's.
*/
#ifdef disable_for_gcc-2_6_0
#define inb(port) ((u_char) u_int_inb(port))
#endif
static inline u_int
u_int_inb(u_int port)

4
sys/i386/include/cpufunc.h
View File

@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: cpufunc.h,v 1.16 1994/08/13 03:49:49 wollman Exp $
* $Id: cpufunc.h,v 1.17 1994/08/18 22:34:46 wollman Exp $
*/
/*
@ -74,7 +74,9 @@ enable_intr(void)
* This roundabout method of returning a u_char helps stop gcc-1.40 from
* generating unnecessary movzbl's.
*/
#ifdef disable_for_gcc-2_6_0
#define inb(port) ((u_char) u_int_inb(port))
#endif
static inline u_int
u_int_inb(u_int port)