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Annotation of GNUtools/cc/config/i386/v3gas.h, revision 1.1.1.1

1.1       root        1: /* Definitions for Intel 386 running system V, using gas.
                      2:    Copyright (C) 1992 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
                     19: 
                     20: #include "gas.h"
                     21: 
                     22: /* Add stuff that normally comes from i386v.h */
                     23: 
                     24: /* longjmp may fail to restore the registers if called from the same
                     25:    function that called setjmp.  To compensate, the compiler avoids
                     26:    putting variables in registers in functions that use both setjmp
                     27:    and longjmp.  */
                     28: 
                     29: #define NON_SAVING_SETJMP \
                     30:   (current_function_calls_setjmp && current_function_calls_longjmp)
                     31: 
                     32: /* longjmp may fail to restore the stack pointer if the saved frame
                     33:    pointer is the same as the caller's frame pointer.  Requiring a frame
                     34:    pointer in any function that calls setjmp or longjmp avoids this
                     35:    problem, unless setjmp and longjmp are called from the same function.
                     36:    Since a frame pointer will be required in such a function, it is OK
                     37:    that the stack pointer is not restored.  */
                     38: 
                     39: #undef FRAME_POINTER_REQUIRED
                     40: #define FRAME_POINTER_REQUIRED \
                     41:   (current_function_calls_setjmp || current_function_calls_longjmp)
                     42: 
                     43: /* Modify ASM_OUTPUT_LOCAL slightly to test -msvr3-shlib, adapted to gas  */
                     44: #undef ASM_OUTPUT_LOCAL
                     45: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)    \
                     46:   do {                                                 \
                     47:     int align = exact_log2 (ROUNDED);                  \
                     48:     if (align > 2) align = 2;                          \
                     49:     if (TARGET_SVR3_SHLIB)                             \
                     50:       {                                                        \
                     51:        data_section ();                                \
                     52:        ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
                     53:        ASM_OUTPUT_LABEL ((FILE), (NAME));              \
                     54:        fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \
                     55:       }                                                        \
                     56:     else                                               \
                     57:       {                                                        \
                     58:        fputs (".lcomm ", (FILE));                      \
                     59:        assemble_name ((FILE), (NAME));                 \
                     60:        fprintf ((FILE), ",%u\n", (ROUNDED));           \
                     61:       }                                                        \
                     62:   } while (0)
                     63: 
                     64: /* Add stuff that normally comes from i386v.h via svr3.h */
                     65: 
                     66: /* Define the actual types of some ANSI-mandated types.  These
                     67:    definitions should work for most SVR3 systems.  */
                     68: 
                     69: #undef SIZE_TYPE
                     70: #define SIZE_TYPE "unsigned int"
                     71: 
                     72: #undef PTRDIFF_TYPE
                     73: #define PTRDIFF_TYPE "int"
                     74: 
                     75: #undef WCHAR_TYPE
                     76: #define WCHAR_TYPE "long int"
                     77: 
                     78: #undef WCHAR_TYPE_SIZE
                     79: #define WCHAR_TYPE_SIZE BITS_PER_WORD

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