register variables vs asm?

[Richard Henderson <rth at cygnus dot com>]

EGCS is not respecting the register assigned to the variable in the
appended example on Alpha.  Unlike the previous nonsense with longjmp,
I should be able to expect this to work, yes?

I'll look at the problem soon, as this also completely screws the kernel.


r~



typedef struct _pthread_descr_struct * pthread_descr;

struct _pthread_descr_struct {
  int p_cancelstate;            
  int p_canceltype;             
  int p_canceled;               
};

static inline pthread_descr thread_self (void) __attribute__ ((const));
static inline pthread_descr thread_self (void)
{
  register pthread_descr __self __asm__("$0");
  __asm__ ("call_pal %1 # %0" : "=r"(__self) : "i"(158 ));
  return __self;
}


int pthread_setcancelstate(int state, int * oldstate)
{
  pthread_descr self = thread_self();
  if (state < 0 || state > 5)
    return 22 ;
  if (oldstate != ((void *)0) ) *oldstate = self->p_cancelstate;
  self->p_cancelstate = state;
  if (self->p_canceled &&
      self->p_cancelstate == 1 &&
      self->p_canceltype == 2)
    pthread_exit(((void *) -1) );
  return 0;
}