/* Target machine description for SGI Iris under Irix 5, for GDB.
   Copyright 1990, 1991, 1992, 1993, 1995 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"

#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 */

#undef  MIPS_NUM_ARG_REGS
#define MIPS_NUM_ARG_REGS 8

#endif /* N32 */

/* When calling functions on Irix 5 (or any MIPS SVR4 ABI compliant
   platform) $25 must hold the function address.  Dest_Reg is a macro
   used in CALL_DUMMY in tm-mips.h.  */
#undef Dest_Reg
#define Dest_Reg 25

/* 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
