gcc/config/alpha/alpha32.h

   1 /* Definitions of target machine for GNU compiler, for DEC Alpha
   2    running Windows/NT.
   3    Copyright (C) 1995, 1996, 1998, 1999 Free Software Foundation, Inc.
   4
   5    Derived from code
   6       Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
   7
   8    Donn Terry, Softway Systems, Inc.
   9
  10    This file contains the code-generation stuff common to the 32-bit
  11    versions of the DEC/Compaq Alpha architecture.  It is shared by
  12    Interix and NT/Win32 ports.   It should not contain compile-time
  13    or run-time dependent environment values (such as compiler options
  14    or anything containing a file or pathname.)
  15
  16 This file is part of GNU CC.
  17
  18 GNU CC is free software; you can redistribute it and/or modify
  19 it under the terms of the GNU General Public License as published by
  20 the Free Software Foundation; either version 2, or (at your option)
  21 any later version.
  22
  23 GNU CC is distributed in the hope that it will be useful,
  24 but WITHOUT ANY WARRANTY; without even the implied warranty of
  25 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26 GNU General Public License for more details.
  27
  28 You should have received a copy of the GNU General Public License
  29 along with GNU CC; see the file COPYING.  If not, write to
  30 the Free Software Foundation, 59 Temple Place - Suite 330,
  31 Boston, MA 02111-1307, USA.  */
  32
  33 #undef TARGET_ABI_WINDOWS_NT
  34 #define TARGET_ABI_WINDOWS_NT 1
  35
  36 /* WinNT (and thus Interix) use unsigned int */
  37 #define SIZE_TYPE "unsigned int"
  38
  39 /* Pointer is 32 bits but the hardware has 64-bit addresses, sign extended.  */
  40 #undef POINTER_SIZE
  41 #define POINTER_SIZE 32
  42 #define POINTERS_EXTEND_UNSIGNED 0
  43
  44 /* We don't change Pmode to the "obvious" SI mode... the above appears
  45    to affect the in-memory size; we want the registers to stay DImode
  46    to match the md file */
  47
  48 /* "long" is 32 bits.  */
  49 #undef LONG_TYPE_SIZE
  50 #define LONG_TYPE_SIZE 32
  51
  52
  53 /* Output assembler code for a block containing the constant parts
  54    of a trampoline, leaving space for the variable parts.
  55
  56    The trampoline should set the static chain pointer to value placed
  57    into the trampoline and should branch to the specified routine.  */
  58
  59 #undef TRAMPOLINE_TEMPLATE
  60 #define TRAMPOLINE_TEMPLATE(FILE)                       \
  61 {                                                       \
  62   fprintf (FILE, "\tbr $27,$LTRAMPP\n");                \
  63   fprintf (FILE, "$LTRAMPP:\n\tldl $1,12($27)\n");      \
  64   fprintf (FILE, "\tldl $27,16($27)\n");                \
  65   fprintf (FILE, "\tjmp $31,($27),0\n");                \
  66   fprintf (FILE, "\t.long 0,0\n");                      \
  67 }
  68
  69 /* Length in units of the trampoline for entering a nested function.  */
  70
  71 #undef TRAMPOLINE_SIZE
  72 #define TRAMPOLINE_SIZE    24
  73
  74 /* The alignment of a trampoline, in bits.  */
  75
  76 #undef TRAMPOLINE_ALIGNMENT
  77 #define TRAMPOLINE_ALIGNMENT  32
  78
  79 /* Emit RTL insns to initialize the variable parts of a trampoline.
  80    FNADDR is an RTX for the address of the function's pure code.
  81    CXT is an RTX for the static chain value for the function.  */
  82
  83 #undef INITIALIZE_TRAMPOLINE
  84 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
  85   alpha_initialize_trampoline (TRAMP, FNADDR, CXT, 20, 16, 12)