gcc/config/pa/pa64-linux.h

   1 /* Definitions for PA_RISC with ELF format on 64-bit Linux
   2    Copyright (C) 1999, 2000 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #undef CPP_SPEC
  22 #define CPP_SPEC "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{mhppa:-D__hppa__} %{posix:-D_POSIX_SOURCE} -D_PA_RISC2_0 -D__LP64__"
  23
  24 #if 0 /* needs some work :-( */
  25 /* If defined, this macro specifies a table of register pairs used to
  26    eliminate unneeded registers that point into the stack frame.  */
  27
  28 #define ELIMINABLE_REGS                                                 \
  29 {                                                                       \
  30   {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM},                         \
  31   {ARG_POINTER_REGNUM,   STACK_POINTER_REGNUM},                         \
  32   {ARG_POINTER_REGNUM,   FRAME_POINTER_REGNUM},                         \
  33 }
  34
  35 /* A C expression that returns nonzero if the compiler is allowed to try to
  36    replace register number FROM with register number TO.  The frame pointer
  37    is automatically handled.  */
  38
  39 #define CAN_ELIMINATE(FROM, TO) 1
  40
  41 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'.  It
  42    specifies the initial difference between the specified pair of
  43    registers.  This macro must be defined if `ELIMINABLE_REGS' is
  44    defined.  */
  45 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
  46   do                                                            \
  47     {                                                           \
  48       int fsize;                                                \
  49                                                                 \
  50       fsize = compute_frame_size (get_frame_size (), 0);        \
  51       if ((TO) == FRAME_POINTER_REGNUM                          \
  52           && (FROM) == ARG_POINTER_REGNUM)                      \
  53         {                                                       \
  54           (OFFSET) = -16;                                       \
  55           break;                                                \
  56         }                                                       \
  57                                                                 \
  58       if ((TO) != STACK_POINTER_REGNUM)                         \
  59         abort ();                                               \
  60                                                                 \
  61       switch (FROM)                                             \
  62         {                                                       \
  63         case FRAME_POINTER_REGNUM:                              \
  64           (OFFSET) = - fsize;                                   \
  65           break;                                                \
  66                                                                 \
  67         case ARG_POINTER_REGNUM:                                \
  68           (OFFSET) = - fsize - 16;                              \
  69           break;                                                \
  70                                                                 \
  71         default:                                                \
  72           abort ();                                             \
  73         }                                                       \
  74     } while (0)
  75 #endif