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1 /* Definitions for Intel 386 running DragonFly with ELF format
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2 Copyright (C) 2014-2018 Free Software Foundation, Inc.
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3 Contributed by John Marino <gnugcc@marino.st>
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26
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27 /* Override the default comment-starter of "/". */
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28 #undef ASM_COMMENT_START
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29 #define ASM_COMMENT_START "#"
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30
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31 #undef ASM_APP_ON
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32 #define ASM_APP_ON "#APP\n"
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33
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34 #undef ASM_APP_OFF
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35 #define ASM_APP_OFF "#NO_APP\n"
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36
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37 #undef DBX_REGISTER_NUMBER
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38 #define DBX_REGISTER_NUMBER(n) \
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39 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
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40
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41 #undef NO_PROFILE_COUNTERS
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42 #define NO_PROFILE_COUNTERS 1
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43
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44 /* Tell final.c that we don't need a label passed to mcount. */
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45
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46 #undef MCOUNT_NAME
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47 #define MCOUNT_NAME ".mcount"
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48
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49 /* Make gcc agree with <machine/ansi.h>. */
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50
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51 #undef SIZE_TYPE
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52 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
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53
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54 #undef PTRDIFF_TYPE
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55 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
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56
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57 #undef WCHAR_TYPE_SIZE
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58 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD)
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59
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60 #undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */
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61 #define SUBTARGET_EXTRA_SPECS \
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62 { "dfbsd_dynamic_linker", DFBSD_DYNAMIC_LINKER }
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63
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64 /* A C statement to output to the stdio stream FILE an assembler
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65 command to advance the location counter to a multiple of 1<<LOG
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66 bytes if it is within MAX_SKIP bytes.
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67
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68 This is used to align code labels according to Intel recommendations. */
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69
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70 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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71 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
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72 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
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73 if ((LOG) != 0) { \
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74 if ((MAX_SKIP) == 0 || (MAX_SKIP) >= (1 << (LOG)) - 1) \
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75 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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76 else \
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77 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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78 }
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79 #endif
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80
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81 /* Don't default to pcc-struct-return, we want to retain compatibility with
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82 older gcc versions AND pcc-struct-return is nonreentrant.
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83 (even though the SVR4 ABI for the i386 says that records and unions are
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84 returned in memory). */
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85
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86 #undef DEFAULT_PCC_STRUCT_RETURN
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87 #define DEFAULT_PCC_STRUCT_RETURN 0
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88
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89 /* DragonFly sets the rounding precision of the FPU to 53 bits. Let the
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90 compiler get the contents of <float.h> and std::numeric_limits correct. */
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91 #undef TARGET_96_ROUND_53_LONG_DOUBLE
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92 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
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93
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94 /* Static stack checking is supported by means of probes. */
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95 #define STACK_CHECK_STATIC_BUILTIN 1
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96
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97 /* Support for i386 was removed from DragonFly in 2007 */
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98 #define SUBTARGET32_DEFAULT_CPU "i486"
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99
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100 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
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