1 files changed, 77 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/ia64/sys/rse.h b/ports/sysdeps/unix/sysv/linux/ia64/sys/rse.h
new file mode 100644
index 0000000000..62fcaba036
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/ia64/sys/rse.h
@@ -0,0 +1,77 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+     Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+   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; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _ia64_rse_h
+#define _ia64_rse_h
+
+#include <features.h>
+
+/* Register stack engine related helper functions.  This file may be
+   used in applications, so be careful about the name-space and give
+   some consideration to non-GNU C compilers (though __inline is
+   fine). */
+
+static __inline unsigned long
+ia64_rse_slot_num (unsigned long *addr)
+{
+	return (((unsigned long) addr) >> 3) & 0x3f;
+}
+
+/* Return TRUE if ADDR is the address of an RNAT slot.  */
+
+static __inline unsigned long
+ia64_rse_is_rnat_slot (unsigned long *addr)
+{
+	return ia64_rse_slot_num (addr) == 0x3f;
+}
+
+/* Returns the address of the RNAT slot that covers the slot at
+   address SLOT_ADDR.  */
+
+static __inline unsigned long *
+ia64_rse_rnat_addr (unsigned long *slot_addr)
+{
+	return (unsigned long *) ((unsigned long) slot_addr | (0x3f << 3));
+}
+
+/* Calcuate the number of registers in the dirty partition starting at
+   BSPSTORE with a size of DIRTY bytes.  This isn't simply DIRTY
+   divided by eight because the 64th slot is used to store ar.rnat.  */
+
+static __inline unsigned long
+ia64_rse_num_regs (unsigned long *bspstore, unsigned long *bsp)
+{
+	unsigned long slots = (bsp - bspstore);
+
+	return slots - (ia64_rse_slot_num(bspstore) + slots)/0x40;
+}
+
+/* The inverse of the above: given bspstore and the number of
+   registers, calculate ar.bsp.  */
+
+static __inline unsigned long *
+ia64_rse_skip_regs (unsigned long *addr, long num_regs)
+{
+	long delta = ia64_rse_slot_num(addr) + num_regs;
+
+	if (num_regs < 0)
+		delta -= 0x3e;
+	return addr + num_regs + delta/0x3f;
+}
+
+#endif /* _ia64_rse_h */