+#if __mips_isa_rev < 2
+ register char *tp __asm__("$3");
+ __asm__ __volatile__ (".word 0x7c03e83b" : "=r" (tp) );
+#else
+ char *tp;
+ __asm__ __volatile__ ("rdhwr %0, $29" : "=r" (tp) );
+#endif
+ return (pthread_t)(tp - 0x7000 - sizeof(struct pthread));