/*
                 * $DragonFly: src/test/sysperf/mtx.s,v 1.2 2006/04/22 22:32:52 dillon Exp $
                 */
                .text
                .globl  get_mtx
                .globl  rel_mtx
                .globl  try_spin_mtx
                .globl  rel_spin_mtx

get_mtx:
                movl    mtx,%edx
                movl    4(%esp),%ecx
1:              subl    %eax,%eax
                lock cmpxchgl %ecx,(%edx)
                jnz     1b
                ret

rel_mtx:
                movl    mtx,%edx
                movl $0,(%edx)
                ret

try_spin_mtx:
                movl    mtx,%edx
                movl    $1,%eax
                xchgl   %eax,(%edx)
                ret

rel_spin_mtx:
                movl    mtx,%edx
                movl    $0,(%edx)
                ret