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1 /* Definitions of target machine for GNU compiler.
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2 MIPS SDE version.
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3 Copyright (C) 2003, 2004, 2007, 2008, 2009
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4 Free Software Foundation, Inc.
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 3, or (at your option)
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11 any later version.
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12
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13 GCC is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22 #undef DRIVER_SELF_SPECS
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23 #define DRIVER_SELF_SPECS \
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24 /* Make sure a -mips option is present. This helps us to pick \
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25 the right multilib, and also makes the later specs easier \
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26 to write. */ \
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27 MIPS_ISA_LEVEL_SPEC, \
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28 \
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29 /* Infer the default float setting from -march. */ \
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30 MIPS_ARCH_FLOAT_SPEC, \
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31 \
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32 /* If no ABI option is specified, infer one from the ISA level \
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33 or -mgp setting. */ \
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34 "%{!mabi=*: %{" MIPS_32BIT_OPTION_SPEC ": -mabi=32;: -mabi=n32}}", \
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35 \
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36 /* Remove a redundant -mfp64 for -mabi=n32; we want the !mfp64 \
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37 multilibs. There's no need to check whether the architecture \
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38 is 64-bit; cc1 will complain if it isn't. */ \
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39 "%{mabi=n32: %<mfp64}", \
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40 \
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41 /* Make sure that an endian option is always present. This makes \
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42 things like LINK_SPEC easier to write. */ \
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43 "%{!EB:%{!EL:%(endian_spec)}}", \
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44 \
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45 /* -mcode-xonly is a traditional alias for -mcode-readable=pcrel and \
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46 -mno-data-in-code is a traditional alias for -mcode-readable=no. \
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47 The latter trumps the former. */ \
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48 "%{mno-data-in-code: -mcode-readable=no}", \
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49 "%{!mcode-readable=no: %{mcode-xonly: -mcode-readable=pcrel}}", \
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50 "%<mno-data-in-code %<mcode-xonly", \
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51 \
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52 /* Configuration-independent MIPS rules. */ \
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53 BASE_DRIVER_SELF_SPECS
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54
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55 /* Use trap rather than break for all but MIPS I ISA. Force -no-mips16,
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56 so that MIPS16 assembler code requires an explicit ".set mips16".
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57 Very little hand-written MIPS16 assembler exists, and some build
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58 systems expect code to be assembled as non-MIPS16 even if the
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59 prevailing compiler flags select -mips16. */
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60 #undef SUBTARGET_ASM_SPEC
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61 #define SUBTARGET_ASM_SPEC "\
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62 %{!mips1:--trap} \
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63 %{mips16:-no-mips16}"
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64
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65 #undef LINK_SPEC
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66 #define LINK_SPEC "\
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67 %(endian_spec) \
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68 %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32*} %{mips64*} \
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69 %{bestGnum} \
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70 %{shared} %{non_shared} %{call_shared} \
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71 %{mabi=n32:-melf32%{EB:b}%{EL:l}tsmipn32} \
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72 %{mabi=64:-melf64%{EB:b}%{EL:l}tsmip} \
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73 %{mabi=32:-melf32%{EB:b}%{EL:l}tsmip}"
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74
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75 #undef DEFAULT_SIGNED_CHAR
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76 #define DEFAULT_SIGNED_CHAR 0
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77
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78 /* SDE-MIPS won't ever support SDB debugging info. */
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79 #undef SDB_DEBUGGING_INFO
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80
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81 /* Describe how we implement __builtin_eh_return. */
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82
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83 /* At the moment, nothing appears to use more than 2 EH data registers.
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84 The chosen registers must not clash with the return register ($2),
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85 EH_RETURN_STACKADJ ($3), or MIPS_EPILOGUE_TEMP ($5), and they must
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86 be general MIPS16 registers. Pick $6 and $7. */
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87 #undef EH_RETURN_DATA_REGNO
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88 #define EH_RETURN_DATA_REGNO(N) \
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89 ((N) < 2 ? 7 - (N) : INVALID_REGNUM)
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90
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91 /* Use $5 as a temporary for both MIPS16 and non-MIPS16. */
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92 #undef MIPS_EPILOGUE_TEMP_REGNUM
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93 #define MIPS_EPILOGUE_TEMP_REGNUM (GP_REG_FIRST + 5)
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94
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95 /* Using long will always be right for size_t and ptrdiff_t, since
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96 sizeof(long) must equal sizeof(void *), following from the setting
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97 of the -mlong64 option. */
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98 #undef SIZE_TYPE
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99 #define SIZE_TYPE "long unsigned int"
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100 #undef PTRDIFF_TYPE
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101 #define PTRDIFF_TYPE "long int"
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102
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103 /* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */
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104 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
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105
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106 /* Use standard ELF-style local labels (not '$' as on early Irix). */
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107 #undef LOCAL_LABEL_PREFIX
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108 #define LOCAL_LABEL_PREFIX "."
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109
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110 /* Use periods rather than dollar signs in special g++ assembler names. */
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111 #define NO_DOLLAR_IN_LABEL
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112
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113 /* Attach a special .ident directive to the end of the file to identify
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114 the version of GCC which compiled this code. */
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115 #undef IDENT_ASM_OP
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116 #define IDENT_ASM_OP "\t.ident\t"
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117
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118 /* Output #ident string into the ELF .comment section, so it doesn't
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119 form part of the load image, and so that it can be stripped. */
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120 #undef ASM_OUTPUT_IDENT
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121 #define ASM_OUTPUT_IDENT(STREAM, STRING) \
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122 fprintf (STREAM, "%s\"%s\"\n", IDENT_ASM_OP, STRING);
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123
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124 /* Currently we don't support 128bit long doubles, so for now we force
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125 n32 to be 64bit. */
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126 #undef LONG_DOUBLE_TYPE_SIZE
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127 #define LONG_DOUBLE_TYPE_SIZE 64
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128
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129 #ifdef IN_LIBGCC2
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130 #undef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
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131 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
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132 #endif
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133
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134 /* Force all .init and .fini entries to be 32-bit, not mips16, so that
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135 in a mixed environment they are all the same mode. The crti.asm and
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136 crtn.asm files will also be compiled as 32-bit due to the
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137 -no-mips16 flag in SUBTARGET_ASM_SPEC above. */
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138 #undef CRT_CALL_STATIC_FUNCTION
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139 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
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140 asm (SECTION_OP "\n\
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141 .set push\n\
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142 .set nomips16\n\
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143 jal " USER_LABEL_PREFIX #FUNC "\n\
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144 .set pop\n\
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145 " TEXT_SECTION_ASM_OP);
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