Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

;; Core of the spinlock implementation
;;
;; Copyright (C) 2004 Axis Communications AB.
;;
;; Author: Mikael Starvik


        .global cris_spin_lock
        .global cris_spin_trylock

        .text

cris_spin_lock:
        clearf  p
1:      test.d  [$r10]
        beq     1b
        clearf  p
        ax
        clear.d [$r10]
        bcs     1b
        clearf  p
        ret
        nop

cris_spin_trylock:
        clearf  p
1:      move.d  [$r10], $r11
        ax
        clear.d [$r10]
        bcs     1b
        clearf  p
        ret
        move.d  $r11,$r10