Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Small optimization for the !DIAGNOSTIC case.

This commit is contained in:
mycroft 1994-09-09 03:16:03 +00:00
parent 675c4aae2b
commit cf04bbff56
1 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
sys/arch/i386/i386/locore.s
View File

@ -37,7 +37,7 @@
* SUCH DAMAGE.
*
* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
* $Id: locore.s,v 1.82 1994/09/08 21:56:14 mycroft Exp $
* $Id: locore.s,v 1.83 1994/09/09 03:16:03 mycroft Exp $
*/
/*
@ -1488,9 +1488,9 @@ ENTRY(setrunqueue)
ENTRY(remrq)
pushl %esi
movl 8(%esp),%esi
#ifdef DIAGNOSTIC
movzbl P_PRIORITY(%esi),%eax
shrl $2,%eax
#ifdef DIAGNOSTIC
btl %eax,_whichqs
jnc 1f
#endif /* DIAGNOSTIC */
@ -1501,6 +1501,10 @@ ENTRY(remrq)
movl $0,P_BACK(%esi) # zap reverse link to indicate off list
cmpl %edx,%ecx # q still has something?
jne 2f
#ifndef DIAGNOSTIC
movzbl P_PRIORITY(%esi),%eax
shrl $2,%eax
#endif
btrl %eax,_whichqs # no; clear bit
2: popl %esi
ret
@ -1583,8 +1587,9 @@ sw1: bsfl %ecx,%ebx # find a full q
movl %edx,P_FORW(%eax)
movl %eax,P_BACK(%edx)
cmpl %edx,%eax # q empty
cmpl %edx,%eax # q empty?
jne 3f
btrl %ebx,%ecx # yes, clear to indicate empty
movl %ecx,_whichqs # update q status