/* Machine-dependent pthreads configuration and inline functions.   Alpha version.   Copyright (C) 1996, 1997, 1998, 2000, 2002 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Richard Henderson <rth@tamu.edu>.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public License as   published by the Free Software Foundation; either version 2.1 of the   License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; see the file COPYING.LIB.  If not,   write to the Free Software Foundation, Inc.,  59 Temple Place - Suite 330,   Boston, MA 02111-1307, USA.  */#ifndef _PT_MACHINE_H#define _PT_MACHINE_H   1#ifndef PT_EI# define PT_EI extern inline#endif#ifdef __linux__# include <asm/pal.h>#else# include <machine/pal.h>#endifextern long int testandset (int *spinlock);extern int __compare_and_swap (long int *p, long int oldval, long int newval);/* Get some notion of the current stack.  Need not be exactly the top   of the stack, just something somewhere in the current frame.  */#define CURRENT_STACK_FRAME  stack_pointerregister char *stack_pointer __asm__("$30");/* Memory barrier; default is to do nothing */#define MEMORY_BARRIER() __asm__ __volatile__("mb" : : : "memory")/* Write barrier.  */#define WRITE_MEMORY_BARRIER() __asm__ __volatile__("wmb" : : : "memory")/* Spinlock implementation; required.  */PT_EI long inttestandset (int *spinlock){  long int ret, temp;  __asm__ __volatile__(	"/* Inline spinlock test & set */\n"	"1:\t"	"ldl_l %0,%3\n\t"	"bne %0,2f\n\t"	"or $31,1,%1\n\t"	"stl_c %1,%2\n\t"	"beq %1,1b\n"	"2:\tmb\n"	"/* End spinlock test & set */"	: "=&r"(ret), "=&r"(temp), "=m"(*spinlock)	: "m"(*spinlock)        : "memory");  return ret;}/* Begin allocating thread stacks at this address.  Default is to allocate   them just below the initial program stack.  */#define THREAD_STACK_START_ADDRESS  0x40000000000/* Return the thread descriptor for the current thread.  */#define THREAD_SELF \({									      \  register pthread_descr __self __asm__("$0");				      \  __asm__ ("call_pal %1" : "=r"(__self) : "i"(PAL_rduniq));		      \  __self;								      \})/* Initialize the thread-unique value.  */#define INIT_THREAD_SELF(descr, nr) \{									      \  register pthread_descr __self __asm__("$16") = (descr);		      \  __asm__ __volatile__ ("call_pal %1" : : "r"(__self), "i"(PAL_wruniq));      \}/* Compare-and-swap for semaphores. */#define HAS_COMPARE_AND_SWAPPT_EI int__compare_and_swap (long int *p, long int oldval, long int newval){  long int ret;  __asm__ __volatile__ (	"/* Inline compare & swap */\n"	"1:\t"	"ldq_l %0,%4\n\t"	"cmpeq %0,%2,%0\n\t"	"beq %0,2f\n\t"	"mov %3,%0\n\t"	"stq_c %0,%1\n\t"	"beq %0,1b\n\t"	"2:\tmb\n"	"/* End compare & swap */"	: "=&r"(ret), "=m"(*p)	: "r"(oldval), "r"(newval), "m"(*p)        : "memory");  return ret;}/* We want the OS to assign stack addresses.  */#define FLOATING_STACKS 1/* Maximum size of the stack if the rlimit is unlimited.  */#define ARCH_STACK_MAX_SIZE     32*1024*1024#endif /* pt-machine.h */