File ffcall/trampoline/cache-convex.c from the latest check-in

/* Instruction cache flushing for convex */

/*
 * Copyright 1995 Bruno Haible, <bruno@clisp.org>
 *
 * This is free software distributed under the GNU General Public Licence
 * described in the file COPYING. Contact the author if you don't have this
 * or can't live with it. There is ABSOLUTELY NO WARRANTY, explicit or implied,
 * on this software.
 */

void __TR_clear_cache (void)
{
  asm volatile ("pich");
}