[src/trunk]: src/sys/arch/arm/arm32 Correct comments for ffs algoritm (it isn...

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

details:   https://anonhg.NetBSD.org/src/rev/d232225cfca9
branches:  trunk
changeset: 517384:d232225cfca9
user:      chris <chris%NetBSD.org@localhost>
date:      Sun Nov 11 22:07:41 2001 +0000

description:
Correct comments for ffs algoritm (it isn't using register r0)

diffstat:

 sys/arch/arm/arm32/cpuswitch.S |  11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diffs (29 lines):

diff -r 0f164e69d97f -r d232225cfca9 sys/arch/arm/arm32/cpuswitch.S
--- a/sys/arch/arm/arm32/cpuswitch.S    Sun Nov 11 22:05:18 2001 +0000
+++ b/sys/arch/arm/arm32/cpuswitch.S    Sun Nov 11 22:07:41 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cpuswitch.S,v 1.2 2001/09/16 17:38:08 matt Exp $       */
+/*     $NetBSD: cpuswitch.S,v 1.3 2001/11/11 22:07:41 chris Exp $      */
 
 /*
  * Copyright (c) 1994-1998 Mark Brinicombe.
@@ -357,14 +357,15 @@
        
        adr     r5, Lcpu_switch_ffs_table
        
-       orr     r4, r0, r0, lsl #4  /* r0 = X * 0x11 */ 
-       orr     r4, r4, r4, lsl #6  /* r0 = X * 0x451 */
-       rsb     r4, r4, r4, lsl #16 /* r0 = X * 0x0450fbaf */
+                                   /* X = R0 */
+       orr     r4, r0, r0, lsl #4  /* r4 = X * 0x11 */ 
+       orr     r4, r4, r4, lsl #6  /* r4 = X * 0x451 */
+       rsb     r4, r4, r4, lsl #16 /* r4 = X * 0x0450fbaf */
        
        /* used further down, saves SA stall */
        ldr     r6, Lqs
               
-       /* now lookup in table indexed on top 6 bits of a0 */
+       /* now lookup in table indexed on top 6 bits of a4 */
        ldrb    r4, [ r5, r4, lsr #26 ]
 
        /* rem: r0 = bit mask of chosen queue (1 << r4) */