/* Target machine description for SGI Iris under Irix 5, for GDB.
   Copyright 1990-1993, 1995, 2000 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "mips/tm-irix3.h"

/* FIXME: cagney/2000-04-04: Testing the _MIPS_SIM_NABI32 and
   _MIPS_SIM in a tm-*.h file is simply wrong!  Those are
   host-dependant macros (provided by /usr/include) and stop any
   chance of the target being cross compiled */
#if defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32
/*
 * Irix 6 (n32 ABI) has 32-bit GP regs and 64-bit FP regs
 */

#undef  REGISTER_BYTES
#define REGISTER_BYTES (MIPS_NUMREGS * 8 + (NUM_REGS - MIPS_NUMREGS) * MIPS_REGSIZE)

#undef  REGISTER_BYTE
#define REGISTER_BYTE(N) \
     (((N) < FP0_REGNUM) ? (N) * MIPS_REGSIZE : \
      ((N) < FP0_REGNUM + 32) ?     \
      FP0_REGNUM * MIPS_REGSIZE + \
      ((N) - FP0_REGNUM) * sizeof(double) : \
      32 * sizeof(double) + ((N) - 32) * MIPS_REGSIZE)

#undef  REGISTER_VIRTUAL_TYPE
#define REGISTER_VIRTUAL_TYPE(N) \
	(((N) >= FP0_REGNUM && (N) < FP0_REGNUM+32) ? builtin_type_double \
	 : ((N) == 32 /*SR*/) ? builtin_type_uint32 \
	 : ((N) >= 70 && (N) <= 89) ? builtin_type_uint32 \
	 : builtin_type_int)

#undef  MIPS_LAST_ARG_REGNUM
#define MIPS_LAST_ARG_REGNUM 11	/* N32 uses R4 through R11 for args */

/* MIPS_STACK_ARGSIZE -- how many bytes does a pushed function arg take
   up on the stack? For the n32 ABI, eight bytes are reserved for each
   register. Like MIPS_SAVED_REGSIZE but different. */
#define MIPS_DEFAULT_STACK_ARGSIZE 8

/* N32 does not reserve home space for registers used to carry
   parameters. */
#define MIPS_REGS_HAVE_HOME_P 0

/* Force N32 ABI as the default. */
#define MIPS_DEFAULT_ABI MIPS_ABI_N32

#endif /* N32 */


/* The signal handler trampoline is called _sigtramp.  */
#undef IN_SIGTRAMP
#define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigtramp", name))

/* Irix 5 saves a full 64 bits for each register.  We skip 2 * 4 to
   get to the saved PC (the register mask and status register are both
   32 bits) and then another 4 to get to the lower 32 bits.  We skip
   the same 4 bytes, plus the 8 bytes for the PC to get to the
   registers, and add another 4 to get to the lower 32 bits.  We skip
   8 bytes per register.  */
#undef SIGFRAME_PC_OFF
#define SIGFRAME_PC_OFF		(SIGFRAME_BASE + 2 * 4 + 4)
#undef SIGFRAME_REGSAVE_OFF
#define SIGFRAME_REGSAVE_OFF	(SIGFRAME_BASE + 2 * 4 + 8 + 4)
#undef SIGFRAME_FPREGSAVE_OFF
#define SIGFRAME_FPREGSAVE_OFF	(SIGFRAME_BASE + 2 * 4 + 8 + 32 * 8 + 4)
#define SIGFRAME_REG_SIZE	8
