CVS commit: src/sys/arch/arm/arm

[Ben Harris <bjh21%netbsd.org@localhost>]

Module Name:    src
Committed By:   bjh21
Date:           Fri Jan 16 10:28:24 UTC 2009

Modified Files:
        src/sys/arch/arm/arm: lock_cas.S

Log Message:
Simplify the pre-ARMv6 code.  Specifically:
 * Take advantage of conditional instructions to avoid branching.
 * Tweak register allocation to remove some MOVs from the debug code.
 * In the debug code, only the address of the counter varies between
   the success and failure cases, so make the rest of the code common.

Also correct the initial comment: _lock_cas returns the old value, not a
boolean.


To generate a diff of this commit:
cvs rdiff -r1.5 -r1.6 src/sys/arch/arm/arm/lock_cas.S

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.