defines.h:139
static inline void
flush_register_windows(void)
{
    asm
#ifdef __GNUC__
	volatile
#endif
# if defined(__sparc_v9__) || defined(__sparcv9) || defined(__arch64__)
	("flushw")
# elif defined(linux) || defined(__linux__)
	("ta  0x83")
# else /* Solaris, OpenBSD, NetBSD, etc. */
	("ta  0x03")
# endif /* trap always to flush register windows if we are on a Sparc system */
	;
}
