gcc/config/rs6000/rs6000-c.c

   1 /* Subroutines for the C front end on the POWER and PowerPC architectures.
   2    Copyright (C) 2002, 2003
   3    Free Software Foundation, Inc.
   4
   5    Contributed by Zack Weinberg <zack@codesourcery.com>
   6
   7    This file is part of GCC.
   8
   9    GCC is free software; you can redistribute it and/or modify it
  10    under the terms of the GNU General Public License as published
  11    by the Free Software Foundation; either version 2, or (at your
  12    option) any later version.
  13
  14    GCC is distributed in the hope that it will be useful, but WITHOUT
  15    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  16    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  17    License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with GCC; see the file COPYING.  If not, write to the
  21    Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  22    MA 02111-1307, USA.  */
  23
  24 #include "config.h"
  25 #include "system.h"
  26 #include "coretypes.h"
  27 #include "tm.h"
  28 #include "cpplib.h"
  29 #include "tree.h"
  30 #include "c-pragma.h"
  31 #include "errors.h"
  32 #include "tm_p.h"
  33
  34 /* Handle the machine specific pragma longcall.  Its syntax is
  35
  36    # pragma longcall ( TOGGLE )
  37
  38    where TOGGLE is either 0 or 1.
  39
  40    rs6000_default_long_calls is set to the value of TOGGLE, changing
  41    whether or not new function declarations receive a longcall
  42    attribute by default.  */
  43
  44 #define SYNTAX_ERROR(msgid) do {                        \
  45   warning (msgid);                                      \
  46   warning ("ignoring malformed #pragma longcall");      \
  47   return;                                               \
  48 } while (0)
  49
  50 void
  51 rs6000_pragma_longcall (cpp_reader *pfile ATTRIBUTE_UNUSED)
  52 {
  53   tree x, n;
  54
  55   /* If we get here, generic code has already scanned the directive
  56      leader and the word "longcall".  */
  57
  58   if (c_lex (&x) != CPP_OPEN_PAREN)
  59     SYNTAX_ERROR ("missing open paren");
  60   if (c_lex (&n) != CPP_NUMBER)
  61     SYNTAX_ERROR ("missing number");
  62   if (c_lex (&x) != CPP_CLOSE_PAREN)
  63     SYNTAX_ERROR ("missing close paren");
  64
  65   if (n != integer_zero_node && n != integer_one_node)
  66     SYNTAX_ERROR ("number must be 0 or 1");
  67
  68   if (c_lex (&x) != CPP_EOF)
  69     warning ("junk at end of #pragma longcall");
  70
  71   rs6000_default_long_calls = (n == integer_one_node);
  72 }
  73
  74 /* Handle defining many CPP flags based on TARGET_xxx.  As a general
  75    policy, rather than trying to guess what flags a user might want a
  76    #define for, it's better to define a flag for everything.  */
  77
  78 #define builtin_define(TXT) cpp_define (pfile, TXT)
  79 #define builtin_assert(TXT) cpp_assert (pfile, TXT)
  80
  81 void
  82 rs6000_cpu_cpp_builtins (cpp_reader *pfile)
  83 {
  84   if (TARGET_POWER2)
  85     builtin_define ("_ARCH_PWR2");
  86   else if (TARGET_POWER)
  87     builtin_define ("_ARCH_PWR");
  88   if (TARGET_POWERPC)
  89     builtin_define ("_ARCH_PPC");
  90   if (TARGET_POWERPC64)
  91     builtin_define ("_ARCH_PPC64");
  92   if (! TARGET_POWER && ! TARGET_POWER2 && ! TARGET_POWERPC)
  93     builtin_define ("_ARCH_COM");
  94   if (TARGET_ALTIVEC)
  95     builtin_define ("__ALTIVEC__");
  96   if (TARGET_SPE)
  97     builtin_define ("__SPE__");
  98   if (TARGET_SOFT_FLOAT)
  99     builtin_define ("_SOFT_FLOAT");
 100   /* Used by lwarx/stwcx. errata work-around.  */
 101   if (rs6000_cpu == PROCESSOR_PPC405)
 102     builtin_define ("__PPC405__");
 103
 104   /* May be overridden by target configuration.  */
 105   RS6000_CPU_CPP_ENDIAN_BUILTINS();
 106
 107   if (TARGET_LONG_DOUBLE_128)
 108     builtin_define ("__LONG_DOUBLE_128__");
 109
 110   switch (rs6000_current_abi)
 111     {
 112     case ABI_V4:
 113       builtin_define ("_CALL_SYSV");
 114       break;
 115     case ABI_AIX:
 116       builtin_define ("_CALL_AIXDESC");
 117       builtin_define ("_CALL_AIX");
 118       break;
 119     case ABI_DARWIN:
 120       builtin_define ("_CALL_DARWIN");
 121       break;
 122     default:
 123       break;
 124     }
 125 }