| /* Intel 80960 specific, C compiler specific functions. |
| Copyright (C) 1992, 1995, 1996, 1997, 1998, 1999, 2000 |
| Free Software Foundation, Inc. |
| Contributed by Steven McGeady, Intel Corp. |
| Additional Work by Glenn Colon-Bonet, Jonathan Shapiro, Andy Wilson |
| Converted to GCC 2.0 by Jim Wilson and Michael Tiemann, Cygnus Support. |
| |
| This file is part of GNU CC. |
| |
| GNU CC 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, or (at your option) |
| any later version. |
| |
| GNU CC 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 GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "cpplib.h" |
| #include "tree.h" |
| #include "c-pragma.h" |
| #include "c-lex.h" |
| #include "toplev.h" |
| #include "ggc.h" |
| #include "tm_p.h" |
| |
| /* Handle pragmas for compatibility with Intel's compilers. */ |
| |
| /* NOTE: ic960 R3.0 pragma align definition: |
| |
| #pragma align [(size)] | (identifier=size[,...]) |
| #pragma noalign [(identifier)[,...]] |
| |
| (all parens are optional) |
| |
| - size is [1,2,4,8,16] |
| - noalign means size==1 |
| - applies only to component elements of a struct (and union?) |
| - identifier applies to structure tag (only) |
| - missing identifier means next struct |
| |
| - alignment rules for bitfields need more investigation. |
| |
| This implementation only handles the case of no identifiers. */ |
| |
| void |
| i960_pr_align (pfile) |
| cpp_reader *pfile ATTRIBUTE_UNUSED; |
| { |
| tree number; |
| enum cpp_ttype type; |
| int align; |
| |
| type = c_lex (&number); |
| if (type == CPP_OPEN_PAREN) |
| type = c_lex (&number); |
| if (type == CPP_NAME) |
| { |
| warning ("sorry, not implemented: #pragma align NAME=SIZE"); |
| return; |
| } |
| if (type != CPP_NUMBER) |
| { |
| warning ("malformed #pragma align - ignored"); |
| return; |
| } |
| |
| align = TREE_INT_CST_LOW (number); |
| switch (align) |
| { |
| case 0: |
| /* Return to last alignment. */ |
| align = i960_last_maxbitalignment / 8; |
| /* Fall through. */ |
| case 16: |
| case 8: |
| case 4: |
| case 2: |
| case 1: |
| i960_last_maxbitalignment = i960_maxbitalignment; |
| i960_maxbitalignment = align * 8; |
| break; |
| |
| default: |
| /* Silently ignore bad values. */ |
| break; |
| } |
| } |
| |
| void |
| i960_pr_noalign (pfile) |
| cpp_reader *pfile ATTRIBUTE_UNUSED; |
| { |
| enum cpp_ttype type; |
| tree number; |
| |
| type = c_lex (&number); |
| if (type == CPP_OPEN_PAREN) |
| type = c_lex (&number); |
| if (type == CPP_NAME) |
| { |
| warning ("sorry, not implemented: #pragma noalign NAME"); |
| return; |
| } |
| |
| i960_last_maxbitalignment = i960_maxbitalignment; |
| i960_maxbitalignment = 8; |
| } |