cris.h File Reference

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Macros
#define	AO_HAVE_test_and_set_full

Functions
AO_INLINE AO_TS_VAL_t	AO_test_and_set_full (volatile AO_TS_t *addr)

Macro Definition Documentation

AO_HAVE_test_and_set_full

#define AO_HAVE_test_and_set_full

Definition at line 65 of file cris.h.

Function Documentation

AO_test_and_set_full()

AO_INLINE AO_TS_VAL_t AO_test_and_set_full

(

volatile AO_TS_t *

addr

)

Definition at line 47 of file cris.h.

                                             {
    /* Ripped from linuxthreads/sysdeps/cris/pt-machine.h */
    register unsigned long int ret;
 
    /* Note the use of a dummy output of *addr to expose the write.  The
       memory barrier is to stop *other* writes being moved past this code.  */
      __asm__ __volatile__("clearf\n"
                           "0:\n\t"
                           "movu.b [%2],%0\n\t"
                           "ax\n\t"
                           "move.b %3,[%2]\n\t"
                           "bwf 0b\n\t"
                           "clearf"
                           : "=&r" (ret), "=m" (*addr)
                           : "r" (addr), "r" ((int) 1), "m" (*addr)
                           : "memory");
    return ret;
}