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Annotation of gcc/config/isi.h, revision 1.1.1.2

1.1       root        1: /* Definitions of target machine for GNU compiler.  ISI 68000/68020 version.
                      2:    Intended only for use with GAS, and not ISI's assembler, which is buggy
                      3:    Copyright (C) 1988 Free Software Foundation, Inc.
                      4: 
                      5: This file is part of GNU CC.
                      6: 
                      7: GNU CC is free software; you can redistribute it and/or modify
                      8: it under the terms of the GNU General Public License as published by
                      9: the Free Software Foundation; either version 2, or (at your option)
                     10: any later version.
                     11: 
                     12: GNU CC is distributed in the hope that it will be useful,
                     13: but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: GNU General Public License for more details.
                     16: 
                     17: You should have received a copy of the GNU General Public License
                     18: along with GNU CC; see the file COPYING.  If not, write to
                     19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
                     20: 
                     21: #include "m68k.h"
                     22: 
                     23: /* See m68k.h.  7 means 68020 with 68881. */
                     24: #ifndef TARGET_DEFAULT
                     25: #define TARGET_DEFAULT 7
                     26: #endif
                     27: 
                     28: #if TARGET_DEFAULT & 2
                     29: /* Define __HAVE_68881__ in preprocessor, unless -msoft-float is specified.
                     30:    This will control the use of inline 68881 insns in certain macros.  */
                     31: 
                     32: #define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
                     33: 
                     34: /* If the 68881 is used, link must load libmc.a instead of libc.a */
                     35: 
1.1.1.2 ! root       36: #define LIB_SPEC "%{msoft-float:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}} \
        !            37: %{!msoft-float:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
        !            38: %{g:-lg}"
1.1       root       39: 
                     40: #else
                     41: /* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
                     42:    This will control the use of inline 68881 insns in certain macros.  */
                     43: 
                     44: #define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
                     45: 
                     46: /* If the 68881 is used, link must load libmc.a instead of libc.a */
                     47: 
1.1.1.2 ! root       48: #define LIB_SPEC "%{!m68881:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}} \
        !            49: %{m68881:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
        !            50: %{g:-lg}"
1.1       root       51: #endif
                     52: 
                     53: /* Names to predefine in the preprocessor for this target machine.  */
                     54: 
                     55: #define CPP_PREDEFINES "-Dunix -Dmc68000 -Dis68k"
                     56: 
                     57: /* This is BSD, so it wants DBX format.  */
                     58: 
                     59: #define DBX_DEBUGGING_INFO
                     60: 
                     61: /* Override parts of m68k.h to fit the ISI 68k machine.  */
                     62: 
                     63: #undef FUNCTION_VALUE
                     64: #undef LIBCALL_VALUE
                     65: #undef FUNCTION_VALUE_REGNO_P
                     66: #undef ASM_FILE_START
                     67: 
1.1.1.2 ! root       68: /* Every structure or union's size must be a multiple of 2 bytes.  */
        !            69: 
        !            70: #define STRUCTURE_SIZE_BOUNDARY 16
        !            71: 
1.1       root       72: /* If TARGET_68881, return SF and DF values in f0 instead of d0.  */
                     73: 
                     74: #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
                     75: 
                     76: #define LIBCALL_VALUE(MODE) \
                     77:  gen_rtx (REG, (MODE), ((TARGET_68881 && ((MODE) == SFmode || (MODE) == DFmode)) ? 16 : 0))
                     78: 
                     79: /* 1 if N is a possible register number for a function value.
                     80:    D0 may be used, and F0 as well if -m68881 is specified.  */
                     81: 
                     82: #define FUNCTION_VALUE_REGNO_P(N) \
                     83:  ((N) == 0 || (TARGET_68881 && (N) == 16))
                     84: 
                     85: /* Also output something to cause the correct _doprnt to be loaded.  */
                     86: #define ASM_FILE_START(FILE) fprintf (FILE, "#NO_APP\n%s\n", TARGET_68881 ? ".globl fltused" : "")

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