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1 /* Prototypes of target machine for GNU compiler. MIPS version.
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2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
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3 1999, 2001, 2002, 2003, 2004, 2005, 2007, 2008
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4 Free Software Foundation, Inc.
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5 Contributed by A. Lichnewsky (lich@inria.inria.fr).
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6 Changed by Michael Meissner (meissner@osf.org).
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7 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and
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8 Brendan Eich (brendan@microunity.com).
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9
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10 This file is part of GCC.
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11
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12 GCC is free software; you can redistribute it and/or modify
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13 it under the terms of the GNU General Public License as published by
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14 the Free Software Foundation; either version 3, or (at your option)
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15 any later version.
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16
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17 GCC is distributed in the hope that it will be useful,
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18 but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 GNU General Public License for more details.
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21
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22 You should have received a copy of the GNU General Public License
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23 along with GCC; see the file COPYING3. If not see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 #ifndef GCC_MIPS_PROTOS_H
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27 #define GCC_MIPS_PROTOS_H
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28
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29 /* Describes how a symbol is used.
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30
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31 SYMBOL_CONTEXT_CALL
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32 The symbol is used as the target of a call instruction.
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33
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34 SYMBOL_CONTEXT_LEA
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35 The symbol is used in a load-address operation.
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36
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37 SYMBOL_CONTEXT_MEM
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38 The symbol is used as the address in a MEM. */
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39 enum mips_symbol_context {
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40 SYMBOL_CONTEXT_CALL,
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41 SYMBOL_CONTEXT_LEA,
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42 SYMBOL_CONTEXT_MEM
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43 };
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44
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45 /* Classifies a SYMBOL_REF, LABEL_REF or UNSPEC address.
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46
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47 SYMBOL_ABSOLUTE
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48 The symbol's value will be calculated using absolute relocations,
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49 such as %hi and %lo.
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50
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51 SYMBOL_GP_RELATIVE
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52 The symbol's value will be calculated by adding a 16-bit offset
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53 from $gp.
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54
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55 SYMBOL_PC_RELATIVE
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56 The symbol's value will be calculated using a MIPS16 PC-relative
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57 calculation.
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58
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59 SYMBOL_FORCE_TO_MEM
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60 The symbol's value must be forced to memory and loaded from there.
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61
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62 SYMBOL_GOT_PAGE_OFST
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63 The symbol's value will be calculated by loading an address
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64 from the GOT and then applying a 16-bit offset.
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65
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66 SYMBOL_GOT_DISP
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67 The symbol's value will be loaded directly from the GOT.
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68
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69 SYMBOL_GOTOFF_PAGE
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70 An UNSPEC wrapper around a SYMBOL_GOT_PAGE_OFST. It represents the
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71 offset from _gp of the GOT entry.
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72
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73 SYMBOL_GOTOFF_DISP
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74 An UNSPEC wrapper around a SYMBOL_GOT_DISP. It represents the
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75 the offset from _gp of the symbol's GOT entry.
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76
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77 SYMBOL_GOTOFF_CALL
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78 Like SYMBOL_GOTOFF_DISP, but used when calling a global function.
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79 The GOT entry is allowed to point to a stub rather than to the
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80 function itself.
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81
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82 SYMBOL_GOTOFF_LOADGP
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83 An UNSPEC wrapper around a function's address. It represents the
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84 offset of _gp from the start of the function.
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85
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86 SYMBOL_TLS
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87 A thread-local symbol.
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88
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89 SYMBOL_TLSGD
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90 SYMBOL_TLSLDM
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91 SYMBOL_DTPREL
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92 SYMBOL_GOTTPREL
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93 SYMBOL_TPREL
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94 UNSPEC wrappers around SYMBOL_TLS, corresponding to the
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95 thread-local storage relocation operators.
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96
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97 SYMBOL_32_HIGH
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98 For a 32-bit symbolic address X, this is the value of %hi(X).
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99
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100 SYMBOL_64_HIGH
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101 For a 64-bit symbolic address X, this is the value of
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102 (%highest(X) << 16) + %higher(X).
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103
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104 SYMBOL_64_MID
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105 For a 64-bit symbolic address X, this is the value of
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106 (%higher(X) << 16) + %hi(X).
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107
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108 SYMBOL_64_LOW
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109 For a 64-bit symbolic address X, this is the value of
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110 (%hi(X) << 16) + %lo(X).
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111
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112 SYMBOL_HALF
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113 An UNSPEC wrapper around any kind of address. It represents the
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114 low 16 bits of that address. */
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115 enum mips_symbol_type {
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116 SYMBOL_ABSOLUTE,
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117 SYMBOL_GP_RELATIVE,
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118 SYMBOL_PC_RELATIVE,
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119 SYMBOL_FORCE_TO_MEM,
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120 SYMBOL_GOT_PAGE_OFST,
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121 SYMBOL_GOT_DISP,
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122 SYMBOL_GOTOFF_PAGE,
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123 SYMBOL_GOTOFF_DISP,
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124 SYMBOL_GOTOFF_CALL,
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125 SYMBOL_GOTOFF_LOADGP,
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126 SYMBOL_TLS,
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127 SYMBOL_TLSGD,
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128 SYMBOL_TLSLDM,
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129 SYMBOL_DTPREL,
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130 SYMBOL_GOTTPREL,
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131 SYMBOL_TPREL,
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132 SYMBOL_32_HIGH,
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133 SYMBOL_64_HIGH,
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134 SYMBOL_64_MID,
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135 SYMBOL_64_LOW,
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136 SYMBOL_HALF
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137 };
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138 #define NUM_SYMBOL_TYPES (SYMBOL_HALF + 1)
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139
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140 /* Identifiers a style of $gp initialization sequence.
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141
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142 LOADGP_NONE
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143 No initialization sequence is needed.
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144
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145 LOADGP_OLDABI
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146 The o32 and o64 PIC sequence (the kind traditionally generated
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147 by .cpload).
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148
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149 LOADGP_NEWABI
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150 The n32 and n64 PIC sequence (the kind traditionally generated
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151 by .cpsetup).
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152
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153 LOADGP_ABSOLUTE
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154 The GNU absolute sequence, as generated by loadgp_absolute.
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155
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156 LOADGP_RTP
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157 The VxWorks RTP PIC sequence, as generated by loadgp_rtp. */
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158 enum mips_loadgp_style {
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159 LOADGP_NONE,
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160 LOADGP_OLDABI,
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161 LOADGP_NEWABI,
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162 LOADGP_ABSOLUTE,
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163 LOADGP_RTP
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164 };
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165
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166 struct mips16e_save_restore_info;
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167
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168 /* Classifies a type of call.
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169
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170 MIPS_CALL_NORMAL
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171 A normal call or call_value pattern.
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172
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173 MIPS_CALL_SIBCALL
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174 A sibcall or sibcall_value pattern.
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175
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176 MIPS_CALL_EPILOGUE
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177 A call inserted in the epilogue. */
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178 enum mips_call_type {
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179 MIPS_CALL_NORMAL,
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180 MIPS_CALL_SIBCALL,
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181 MIPS_CALL_EPILOGUE
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182 };
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183
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184 extern bool mips_symbolic_constant_p (rtx, enum mips_symbol_context,
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185 enum mips_symbol_type *);
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186 extern int mips_regno_mode_ok_for_base_p (int, enum machine_mode, bool);
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187 extern bool mips_legitimate_address_p (enum machine_mode, rtx, bool);
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188 extern bool mips_stack_address_p (rtx, enum machine_mode);
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189 extern int mips_address_insns (rtx, enum machine_mode, bool);
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190 extern int mips_const_insns (rtx);
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191 extern int mips_split_const_insns (rtx);
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192 extern int mips_load_store_insns (rtx, rtx);
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193 extern int mips_idiv_insns (void);
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194 extern rtx mips_emit_move (rtx, rtx);
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195 extern rtx mips_pic_base_register (rtx);
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196 extern rtx mips_got_load (rtx, rtx, enum mips_symbol_type);
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197 extern bool mips_split_symbol (rtx, rtx, enum machine_mode, rtx *);
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198 extern rtx mips_unspec_address (rtx, enum mips_symbol_type);
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199 extern bool mips_legitimize_address (rtx *, enum machine_mode);
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200 extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT);
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201 extern bool mips_legitimize_move (enum machine_mode, rtx, rtx);
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202
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203 extern int m16_uimm3_b (rtx, enum machine_mode);
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204 extern int m16_simm4_1 (rtx, enum machine_mode);
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205 extern int m16_nsimm4_1 (rtx, enum machine_mode);
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206 extern int m16_simm5_1 (rtx, enum machine_mode);
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207 extern int m16_nsimm5_1 (rtx, enum machine_mode);
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208 extern int m16_uimm5_4 (rtx, enum machine_mode);
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209 extern int m16_nuimm5_4 (rtx, enum machine_mode);
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210 extern int m16_simm8_1 (rtx, enum machine_mode);
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211 extern int m16_nsimm8_1 (rtx, enum machine_mode);
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212 extern int m16_uimm8_1 (rtx, enum machine_mode);
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213 extern int m16_nuimm8_1 (rtx, enum machine_mode);
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214 extern int m16_uimm8_m1_1 (rtx, enum machine_mode);
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215 extern int m16_uimm8_4 (rtx, enum machine_mode);
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216 extern int m16_nuimm8_4 (rtx, enum machine_mode);
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217 extern int m16_simm8_8 (rtx, enum machine_mode);
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218 extern int m16_nsimm8_8 (rtx, enum machine_mode);
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219
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220 extern rtx mips_subword (rtx, bool);
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221 extern bool mips_split_64bit_move_p (rtx, rtx);
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222 extern void mips_split_doubleword_move (rtx, rtx);
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223 extern const char *mips_output_move (rtx, rtx);
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224 extern void mips_restore_gp (rtx);
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225 #ifdef RTX_CODE
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226 extern bool mips_expand_scc (enum rtx_code, rtx);
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227 extern void mips_expand_conditional_branch (rtx *, enum rtx_code);
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228 extern void mips_expand_vcondv2sf (rtx, rtx, rtx, enum rtx_code, rtx, rtx);
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229 extern void mips_expand_conditional_move (rtx *);
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230 extern void mips_expand_conditional_trap (enum rtx_code);
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231 #endif
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232 extern bool mips_use_pic_fn_addr_reg_p (const_rtx);
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233 extern rtx mips_expand_call (enum mips_call_type, rtx, rtx, rtx, rtx, bool);
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234 extern void mips_split_call (rtx, rtx);
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235 extern void mips_expand_fcc_reload (rtx, rtx, rtx);
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236 extern void mips_set_return_address (rtx, rtx);
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237 extern bool mips_expand_block_move (rtx, rtx, rtx);
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238 extern void mips_expand_synci_loop (rtx, rtx);
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239
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240 extern void mips_init_cumulative_args (CUMULATIVE_ARGS *, tree);
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241 extern void mips_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode,
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242 tree, int);
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243 extern rtx mips_function_arg (const CUMULATIVE_ARGS *,
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244 enum machine_mode, tree, int);
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245 extern int mips_function_arg_boundary (enum machine_mode, tree);
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246 extern bool mips_pad_arg_upward (enum machine_mode, const_tree);
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247 extern bool mips_pad_reg_upward (enum machine_mode, tree);
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248
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249 extern bool mips_expand_ext_as_unaligned_load (rtx, rtx, HOST_WIDE_INT,
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250 HOST_WIDE_INT);
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251 extern bool mips_expand_ins_as_unaligned_store (rtx, rtx, HOST_WIDE_INT,
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252 HOST_WIDE_INT);
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253 extern bool mips_mem_fits_mode_p (enum machine_mode mode, rtx x);
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254 extern void mips_override_options (void);
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255 extern void mips_conditional_register_usage (void);
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256 extern void mips_order_regs_for_local_alloc (void);
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257 extern HOST_WIDE_INT mips_debugger_offset (rtx, HOST_WIDE_INT);
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258
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259 extern void mips_print_operand (FILE *, rtx, int);
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260 extern void mips_print_operand_address (FILE *, rtx);
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261 extern void mips_output_external (FILE *, tree, const char *);
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262 extern void mips_output_filename (FILE *, const char *);
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263 extern void mips_output_ascii (FILE *, const char *, size_t);
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264 extern void mips_output_aligned_decl_common (FILE *, tree, const char *,
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265 unsigned HOST_WIDE_INT,
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266 unsigned int);
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267 extern void mips_declare_common_object (FILE *, const char *,
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268 const char *, unsigned HOST_WIDE_INT,
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269 unsigned int, bool);
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270 extern void mips_declare_object (FILE *, const char *, const char *,
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271 const char *, ...) ATTRIBUTE_PRINTF_4;
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272 extern void mips_declare_object_name (FILE *, const char *, tree);
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273 extern void mips_finish_declare_object (FILE *, tree, int, int);
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274
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275 extern bool mips_small_data_pattern_p (rtx);
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276 extern rtx mips_rewrite_small_data (rtx);
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277 extern bool mips_frame_pointer_required (void);
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278 extern HOST_WIDE_INT mips_initial_elimination_offset (int, int);
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279 extern rtx mips_return_addr (int, rtx);
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280 extern enum mips_loadgp_style mips_current_loadgp_style (void);
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281 extern void mips_expand_prologue (void);
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282 extern void mips_expand_before_return (void);
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283 extern void mips_expand_epilogue (bool);
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284 extern bool mips_can_use_return_insn (void);
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285 extern rtx mips_function_value (const_tree, enum machine_mode);
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286
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287 extern bool mips_cannot_change_mode_class (enum machine_mode,
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288 enum machine_mode, enum reg_class);
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289 extern bool mips_dangerous_for_la25_p (rtx);
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290 extern bool mips_modes_tieable_p (enum machine_mode, enum machine_mode);
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291 extern enum reg_class mips_preferred_reload_class (rtx, enum reg_class);
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292 extern enum reg_class mips_secondary_reload_class (enum reg_class,
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293 enum machine_mode,
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294 rtx, bool);
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295 extern int mips_class_max_nregs (enum reg_class, enum machine_mode);
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296 extern int mips_register_move_cost (enum machine_mode, enum reg_class,
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297 enum reg_class);
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298
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299 extern int mips_adjust_insn_length (rtx, int);
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300 extern const char *mips_output_load_label (void);
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301 extern const char *mips_output_conditional_branch (rtx, rtx *, const char *,
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302 const char *);
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303 extern const char *mips_output_order_conditional_branch (rtx, rtx *, bool);
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304 extern const char *mips_output_sync_loop (const char *);
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305 extern const char *mips_output_division (const char *, rtx *);
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306 extern unsigned int mips_hard_regno_nregs (int, enum machine_mode);
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307 extern bool mips_linked_madd_p (rtx, rtx);
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308 extern bool mips_store_data_bypass_p (rtx, rtx);
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309 extern rtx mips_prefetch_cookie (rtx, rtx);
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310
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311 extern void irix_asm_output_align (FILE *, unsigned);
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312 extern const char *current_section_name (void);
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313 extern unsigned int current_section_flags (void);
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314 extern bool mips_use_ins_ext_p (rtx, HOST_WIDE_INT, HOST_WIDE_INT);
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315
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316 extern const char *mips16e_output_save_restore (rtx, HOST_WIDE_INT);
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317 extern bool mips16e_save_restore_pattern_p (rtx, HOST_WIDE_INT,
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318 struct mips16e_save_restore_info *);
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319
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320 extern bool mask_low_and_shift_p (enum machine_mode, rtx, rtx, int);
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321 extern int mask_low_and_shift_len (enum machine_mode, rtx, rtx);
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322
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323 union mips_gen_fn_ptrs
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324 {
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325 rtx (*fn_6) (rtx, rtx, rtx, rtx, rtx, rtx);
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326 rtx (*fn_5) (rtx, rtx, rtx, rtx, rtx);
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327 rtx (*fn_4) (rtx, rtx, rtx, rtx);
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328 };
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329
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330 extern void mips_expand_atomic_qihi (union mips_gen_fn_ptrs,
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331 rtx, rtx, rtx, rtx);
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332
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333 extern void mips_expand_vector_init (rtx, rtx);
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334
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335 #endif /* ! GCC_MIPS_PROTOS_H */
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