43fabf7d74
* i960.h (i960_maxbitalignment, i960_last_maxbitalignment): Declare. * i960.c (i960_maxbitalignment, i960_last_maxbitalignment): Make global. (process_pragma): Delete. (i960_pr_align, i960_pr_noalign): Move from here ... * i960-c.c: ... to this new file. * t-960bare (i960-c.o): New rule. * t-vxworks960 (i960-c.o): Likewise. * config.gcc (i960-*-*): Define c_target_objs and cxx_target_objs. From-SVN: r40502
117 lines
3.0 KiB
C
117 lines
3.0 KiB
C
/* Intel 80960 specific, C compiler specific functions.
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Copyright (C) 1992, 1995, 1996, 1997, 1998, 1999, 2000
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Free Software Foundation, Inc.
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Contributed by Steven McGeady, Intel Corp.
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Additional Work by Glenn Colon-Bonet, Jonathan Shapiro, Andy Wilson
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Converted to GCC 2.0 by Jim Wilson and Michael Tiemann, Cygnus Support.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "config.h"
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#include "system.h"
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#include "cpplib.h"
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#include "tree.h"
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#include "c-pragma.h"
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#include "c-lex.h"
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#include "toplev.h"
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#include "ggc.h"
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#include "tm_p.h"
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/* Handle pragmas for compatibility with Intel's compilers. */
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/* NOTE: ic960 R3.0 pragma align definition:
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#pragma align [(size)] | (identifier=size[,...])
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#pragma noalign [(identifier)[,...]]
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(all parens are optional)
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- size is [1,2,4,8,16]
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- noalign means size==1
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- applies only to component elements of a struct (and union?)
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- identifier applies to structure tag (only)
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- missing identifier means next struct
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- alignment rules for bitfields need more investigation.
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This implementation only handles the case of no identifiers. */
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void
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i960_pr_align (pfile)
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cpp_reader *pfile ATTRIBUTE_UNUSED;
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{
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tree number;
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enum cpp_ttype type;
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int align;
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type = c_lex (&number);
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if (type == CPP_OPEN_PAREN)
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type = c_lex (&number);
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if (type == CPP_NAME)
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{
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warning ("sorry, not implemented: #pragma align NAME=SIZE");
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return;
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}
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if (type != CPP_NUMBER)
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{
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warning ("malformed #pragma align - ignored");
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return;
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}
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align = TREE_INT_CST_LOW (number);
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switch (align)
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{
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case 0:
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/* Return to last alignment. */
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align = i960_last_maxbitalignment / 8;
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/* Fall through. */
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case 16:
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case 8:
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case 4:
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case 2:
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case 1:
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i960_last_maxbitalignment = i960_maxbitalignment;
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i960_maxbitalignment = align * 8;
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break;
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default:
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/* Silently ignore bad values. */
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break;
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}
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}
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void
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i960_pr_noalign (pfile)
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cpp_reader *pfile ATTRIBUTE_UNUSED;
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{
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enum cpp_ttype type;
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tree number;
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type = c_lex (&number);
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if (type == CPP_OPEN_PAREN)
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type = c_lex (&number);
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if (type == CPP_NAME)
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{
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warning ("sorry, not implemented: #pragma noalign NAME");
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return;
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}
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i960_last_maxbitalignment = i960_maxbitalignment;
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i960_maxbitalignment = 8;
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}
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