[src/trunk]: src/sys/arch/i386/stand/lib use %e?x instead of %?x as 'xorl' ar...

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/11d9166da5cd
branches:  trunk
changeset: 542205:11d9166da5cd
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Thu Jan 23 21:01:18 2003 +0000

description:
use %e?x instead of %?x as 'xorl' arguments
use %al for 'movb' target, and 'andb' for masking the result with $0x02
since 'and' conveniently sets ZF, use 'and+jnz' instead of 'and+cmp+jne'

diffstat:

 sys/arch/i386/stand/lib/biosmca.S |  16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diffs (39 lines):

diff -r ef73decd7ead -r 11d9166da5cd sys/arch/i386/stand/lib/biosmca.S
--- a/sys/arch/i386/stand/lib/biosmca.S Thu Jan 23 20:41:01 2003 +0000
+++ b/sys/arch/i386/stand/lib/biosmca.S Thu Jan 23 21:01:18 2003 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: biosmca.S,v 1.2 2001/05/14 22:14:47 jdolecek Exp $     */
+/*     $NetBSD: biosmca.S,v 1.3 2003/01/23 21:01:18 jdolecek Exp $     */
 
 /*
  * Ported to boot 386BSD by Julian Elischer (julian%tfs.com@localhost) Sept 1992
@@ -83,22 +83,22 @@
 
        call    _C_LABEL(prot_to_real)  # enter real mode
 
-       # zero %cx
+       # zero %ecx
        data32
-       xorl    %cx, %cx
+       xorl    %ecx, %ecx
 
        data32
-       xorl    %ax, %ax
+       xorl    %eax, %eax
        movb    $0xc0, %ah      # subfunction
        int     $0x15
        jc      back
 
        # check feature byte 1 if MCA bus present and replaces ISA
        addr32
-       movb    %es:5(%ebx), %ax
-       andw    $0x02, %ax      # bit 1 set means MCA instead of ISA
-       cmpw    $0x02, %ax      # see also arch/i386/mca/mca_machdep.c
-       jne     back
+       movb    %es:5(%ebx), %al
+       andb    $0x02, %al      # bit 1 set means MCA instead of ISA
+                               # see also arch/i386/mca/mca_machdep.c
+       jnz     back
        
        # save model and submodel bytes to %cx
        addr32