| /* 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #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 */ |
