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111
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1 /* Target definitions for PowerPC running Darwin (Mac OS X).
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2 Copyright (C) 1997-2017 Free Software Foundation, Inc.
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3 Contributed by Apple Computer Inc.
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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 it
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8 under the terms of the GNU General Public License as published
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9 by the Free Software Foundation; either version 3, or (at your
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10 option) any later version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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15 License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #undef DARWIN_PPC
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22 #define DARWIN_PPC 1
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23
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24 /* The "Darwin ABI" is mostly like AIX, but with some key differences. */
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25
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26 #define DEFAULT_ABI ABI_DARWIN
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27
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28 #ifdef IN_LIBGCC2
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29 #undef TARGET_64BIT
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30 #ifdef __powerpc64__
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31 #define TARGET_64BIT 1
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32 #else
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33 #define TARGET_64BIT 0
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34 #endif
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35 #endif
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36
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37 /* The object file format is Mach-O. */
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38
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39 #define TARGET_OBJECT_FORMAT OBJECT_MACHO
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40
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41 /* Size of the Obj-C jump buffer. */
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42 #define OBJC_JBLEN ((TARGET_64BIT) ? (26*2 + 18*2 + 129 + 1) : (26 + 18*2 + 129 + 1))
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43
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44 /* We're not ever going to do TOCs. */
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45
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46 #define TARGET_TOC 0
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47 #define TARGET_NO_TOC 1
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48
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49 /* Override the default rs6000 definition. */
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50 #undef PTRDIFF_TYPE
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51 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
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52
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53 #define TARGET_OS_CPP_BUILTINS() \
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54 do \
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55 { \
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56 if (!TARGET_64BIT) builtin_define ("__ppc__"); \
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57 if (TARGET_64BIT) builtin_define ("__ppc64__"); \
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58 builtin_define ("__POWERPC__"); \
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59 builtin_define ("__NATURAL_ALIGNMENT__"); \
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60 darwin_cpp_builtins (pfile); \
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61 } \
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62 while (0)
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63
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64 /* Generate branch islands stubs if this is true. */
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65 extern int darwin_emit_branch_islands;
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66
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67 #define SUBTARGET_OVERRIDE_OPTIONS darwin_rs6000_override_options ()
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68
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69 #define C_COMMON_OVERRIDE_OPTIONS do { \
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70 /* On powerpc, __cxa_get_exception_ptr is available starting in the \
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71 10.4.6 libstdc++.dylib. */ \
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72 if (strverscmp (darwin_macosx_version_min, "10.4.6") < 0 \
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73 && flag_use_cxa_get_exception_ptr == 2) \
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74 flag_use_cxa_get_exception_ptr = 0; \
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75 if (flag_mkernel) \
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76 flag_no_builtin = 1; \
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77 SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
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78 } while (0)
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79
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80 /* Darwin has 128-bit long double support in libc in 10.4 and later.
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81 Default to 128-bit long doubles even on earlier platforms for ABI
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82 consistency; arithmetic will work even if libc and libm support is
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83 not available. */
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84
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85 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
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86
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87
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88 /* We want -fPIC by default, unless we're using -static to compile for
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89 the kernel or some such. The "-faltivec" option should have been
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90 called "-maltivec" all along. */
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91
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92 #define CC1_SPEC "\
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93 %(cc1_cpu) \
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94 %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} \
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95 %{static: %{Zdynamic: %e conflicting code gen style switches are used}}\
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96 %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
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97 %{faltivec:-maltivec -include altivec.h} %{fno-altivec:-mno-altivec} \
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98 %<faltivec %<fno-altivec " \
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99 DARWIN_CC1_SPEC
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100
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101 #define DARWIN_ARCH_SPEC "%{m64:ppc64;:ppc}"
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102
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103 #define DARWIN_SUBARCH_SPEC " \
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104 %{m64: ppc64} \
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105 %{!m64: \
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106 %{mcpu=601:ppc601; \
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107 mcpu=603:ppc603; \
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108 mcpu=603e:ppc603; \
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109 mcpu=604:ppc604; \
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110 mcpu=604e:ppc604e; \
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111 mcpu=740:ppc750; \
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112 mcpu=750:ppc750; \
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113 mcpu=G3:ppc750; \
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114 mcpu=7400:ppc7400; \
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115 mcpu=G4:ppc7400; \
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116 mcpu=7450:ppc7450; \
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117 mcpu=970:ppc970; \
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118 mcpu=power4:ppc970; \
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119 mcpu=G5:ppc970; \
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120 :ppc}}"
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121
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122 /* crt2.o is at least partially required for 10.3.x and earlier. */
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123 #define DARWIN_CRT2_SPEC \
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124 "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}"
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125
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126 #undef SUBTARGET_EXTRA_SPECS
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127 #define SUBTARGET_EXTRA_SPECS \
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128 DARWIN_EXTRA_SPECS \
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129 { "darwin_arch", DARWIN_ARCH_SPEC }, \
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130 { "darwin_crt2", DARWIN_CRT2_SPEC }, \
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131 { "darwin_subarch", DARWIN_SUBARCH_SPEC },
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132
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133 /* Output a .machine directive. */
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134 #undef TARGET_ASM_FILE_START
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135 #define TARGET_ASM_FILE_START rs6000_darwin_file_start
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136
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137 /* Make both r2 and r13 available for allocation. */
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138 #define FIXED_R2 0
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139 #define FIXED_R13 0
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140
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141 /* Base register for access to local variables of the function. */
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142
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143 #undef HARD_FRAME_POINTER_REGNUM
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144 #define HARD_FRAME_POINTER_REGNUM 30
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145
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146 #undef RS6000_PIC_OFFSET_TABLE_REGNUM
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147 #define RS6000_PIC_OFFSET_TABLE_REGNUM 31
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148
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149 /* Pad the outgoing args area to 16 bytes instead of the usual 8. */
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150
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151 #undef RS6000_STARTING_FRAME_OFFSET
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152 #define RS6000_STARTING_FRAME_OFFSET \
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153 (RS6000_ALIGN (crtl->outgoing_args_size, 16) \
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154 + RS6000_SAVE_AREA)
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155
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156 #undef STACK_DYNAMIC_OFFSET
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157 #define STACK_DYNAMIC_OFFSET(FUNDECL) \
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158 (RS6000_ALIGN (crtl->outgoing_args_size, 16) \
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159 + (STACK_POINTER_OFFSET))
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160
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161 /* Darwin uses a function call if everything needs to be saved/restored. */
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162
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163 #undef WORLD_SAVE_P
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164 #define WORLD_SAVE_P(INFO) ((INFO)->world_save_p)
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165
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166 /* We don't use these on Darwin, they are just place-holders. */
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167 #define SAVE_FP_PREFIX ""
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168 #define SAVE_FP_SUFFIX ""
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169 #define RESTORE_FP_PREFIX ""
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170 #define RESTORE_FP_SUFFIX ""
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171
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172 /* The assembler wants the alternate register names, but without
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173 leading percent sign. */
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174 #undef REGISTER_NAMES
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175 #define REGISTER_NAMES \
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176 { \
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177 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
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178 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
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179 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
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180 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
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181 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
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182 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
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183 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
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184 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
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185 "mq", "lr", "ctr", "ap", \
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186 "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", \
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187 "xer", \
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188 "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \
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189 "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \
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190 "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \
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191 "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", \
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192 "vrsave", "vscr", \
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193 "spe_acc", "spefscr", \
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194 "sfp", \
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195 "tfhar", "tfiar", "texasr", \
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196 "rh0", "rh1", "rh2", "rh3", "rh4", "rh5", "rh6", "rh7", \
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197 "rh8", "rh9", "rh10", "rh11", "rh12", "rh13", "rh14", "rh15", \
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198 "rh16", "rh17", "rh18", "rh19", "rh20", "rh21", "rh22", "rh23", \
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199 "rh24", "rh25", "rh26", "rh27", "rh28", "rh29", "rh30", "rh31" \
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200 }
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201
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202 /* This outputs NAME to FILE. */
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203
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204 #undef RS6000_OUTPUT_BASENAME
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205 #define RS6000_OUTPUT_BASENAME(FILE, NAME) \
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206 assemble_name (FILE, NAME)
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207
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208 /* Globalizing directive for a label. */
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209 #undef GLOBAL_ASM_OP
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210 #define GLOBAL_ASM_OP "\t.globl "
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211 #undef TARGET_ASM_GLOBALIZE_LABEL
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212
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213 /* This is how to output an internal label prefix. rs6000.c uses this
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214 when generating traceback tables. */
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215 /* Not really used for Darwin? */
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216
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217 #undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
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218 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
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219 fprintf (FILE, "%s", PREFIX)
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220
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221 /* Override the standard rs6000 definition. */
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222
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223 #undef ASM_COMMENT_START
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224 #define ASM_COMMENT_START ";"
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225
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226 /* This is how to output an assembler line that says to advance
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227 the location counter to a multiple of 2**LOG bytes using the
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228 "nop" instruction as padding. */
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229
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230 #define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \
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231 do \
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232 { \
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233 if ((LOG) < 3) \
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234 { \
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235 ASM_OUTPUT_ALIGN (FILE,LOG); \
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236 } \
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237 else /* nop == ori r0,r0,0 */ \
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238 fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG)); \
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239 } while (0)
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240
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241 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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242 /* This is supported in cctools 465 and later. The macro test
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243 above prevents using it in earlier build environments. */
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244 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
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245 if ((LOG) != 0) \
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246 { \
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247 if ((MAX_SKIP) == 0) \
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248 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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249 else \
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250 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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251 }
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252 #endif
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253
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254 /* Generate insns to call the profiler. */
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255
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256 #define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
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257
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258 /* Function name to call to do profiling. */
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259
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260 #define RS6000_MCOUNT "*mcount"
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261
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262 /* Default processor: G4, and G5 for 64-bit. */
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263
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264 #undef PROCESSOR_DEFAULT
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265 #define PROCESSOR_DEFAULT PROCESSOR_PPC7400
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266 #undef PROCESSOR_DEFAULT64
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267 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER4
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268
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269 /* Default target flag settings. Despite the fact that STMW/LMW
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270 serializes, it's still a big code size win to use them. Use FSEL by
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271 default as well. */
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272
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273 #undef TARGET_DEFAULT
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274 #define TARGET_DEFAULT (MASK_MULTIPLE | MASK_PPC_GFXOPT)
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275
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276 /* Darwin always uses IBM long double, never IEEE long double. */
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277 #undef TARGET_IEEEQUAD
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278 #define TARGET_IEEEQUAD 0
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279
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280 /* Since Darwin doesn't do TOCs, stub this out. */
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281
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282 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) ((void)X, (void)MODE, 0)
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283
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284 /* Unlike most other PowerPC targets, chars are signed, for
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285 consistency with other Darwin architectures. */
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286
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287 #undef DEFAULT_SIGNED_CHAR
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288 #define DEFAULT_SIGNED_CHAR (1)
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289
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290 /* Given an rtx X being reloaded into a reg required to be
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291 in class CLASS, return the class of reg to actually use.
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292 In general this is just CLASS; but on some machines
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293 in some cases it is preferable to use a more restrictive class.
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294
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295 On the RS/6000, we have to return NO_REGS when we want to reload a
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296 floating-point CONST_DOUBLE to force it to be copied to memory.
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297
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298 Don't allow R0 when loading the address of, or otherwise furtling with,
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299 a SYMBOL_REF. */
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300
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301 #undef PREFERRED_RELOAD_CLASS
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302 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
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303 ((CONSTANT_P (X) \
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304 && reg_classes_intersect_p ((CLASS), FLOAT_REGS)) \
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305 ? NO_REGS \
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306 : ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \
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307 && reg_class_subset_p (BASE_REGS, (CLASS))) \
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308 ? BASE_REGS \
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309 : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \
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310 && (CLASS) == NON_SPECIAL_REGS) \
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311 ? GENERAL_REGS \
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312 : (CLASS))
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313
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314 /* Compute field alignment.
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315 This implements the 'power' alignment rule by pegging the alignment of
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316 items (beyond the first aggregate field) to 32 bits. The pegging is
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317 suppressed for vector and long double items (both 128 in size).
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318 There is a dummy use of the FIELD argument to avoid an unused variable
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319 warning (see PR59496). */
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320 #define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \
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321 ((void) (FIELD), \
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322 (TARGET_ALIGN_NATURAL \
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323 ? (COMPUTED) \
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324 : (COMPUTED) == 128 \
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325 ? 128 \
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326 : MIN ((COMPUTED), 32)))
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327
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328 /* Darwin increases natural record alignment to doubleword if the first
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329 field is an FP double while the FP fields remain word aligned. */
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330 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
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331 ((TREE_CODE (STRUCT) == RECORD_TYPE \
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332 || TREE_CODE (STRUCT) == UNION_TYPE \
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333 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
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334 && TARGET_ALIGN_NATURAL == 0 \
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335 ? darwin_rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
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336 : (TREE_CODE (STRUCT) == VECTOR_TYPE \
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337 && ALTIVEC_VECTOR_MODE (TYPE_MODE (STRUCT))) \
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338 ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \
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339 : MAX ((COMPUTED), (SPECIFIED)))
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340
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341 /* Specify padding for the last element of a block move between
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342 registers and memory. FIRST is nonzero if this is the only
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343 element. */
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344 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
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345 (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE))
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346
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347 #define DOUBLE_INT_ASM_OP "\t.quad\t"
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348
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349 /* For binary compatibility with 2.95; Darwin C APIs use bool from
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350 stdbool.h, which was an int-sized enum in 2.95. Users can explicitly
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351 choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */
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352 #define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE)
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353
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354 #undef REGISTER_TARGET_PRAGMAS
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355 #define REGISTER_TARGET_PRAGMAS() \
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356 do \
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357 { \
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358 DARWIN_REGISTER_TARGET_PRAGMAS(); \
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359 targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \
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360 } \
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361 while (0)
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362
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363 #ifdef IN_LIBGCC2
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364 #include <stdbool.h>
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365 #endif
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366
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367 /* True, iff we're generating fast turn around debugging code. When
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368 true, we arrange for function prologues to start with 5 nops so
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369 that gdb may insert code to redirect them, and for data to be
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370 accessed indirectly. The runtime uses this indirection to forward
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371 references for data to the original instance of that data. */
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372
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373 #define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue)
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374
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375 /* This is the reserved direct dispatch address for Objective-C. */
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376 #define OFFS_MSGSEND_FAST 0xFFFEFF00
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377
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378 /* This is the reserved ivar address Objective-C. */
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379 #define OFFS_ASSIGNIVAR_FAST 0xFFFEFEC0
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380
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381 /* Old versions of Mac OS/Darwin don't have C99 functions available. */
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382 #undef TARGET_LIBC_HAS_FUNCTION
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383 #define TARGET_LIBC_HAS_FUNCTION darwin_libc_has_function
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384
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385 /* When generating kernel code or kexts, we don't use Altivec by
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386 default, as kernel code doesn't save/restore those registers. */
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387 #define OS_MISSING_ALTIVEC (flag_mkernel || flag_apple_kext)
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388
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389 /* Darwin has support for section anchors on powerpc*.
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390 It is disabled for any section containing a "zero-sized item" (because these
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391 are re-written as size=1 to be compatible with the OSX ld64).
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392 The re-writing would interfere with the computation of anchor offsets.
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393 Therefore, we place zero-sized items in their own sections and make such
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394 sections unavailable to section anchoring. */
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395
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396 #undef TARGET_ASM_OUTPUT_ANCHOR
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397 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
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398
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399 #undef TARGET_USE_ANCHORS_FOR_SYMBOL_P
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400 #define TARGET_USE_ANCHORS_FOR_SYMBOL_P darwin_use_anchors_for_symbol_p
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401
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402 #undef DARWIN_SECTION_ANCHORS
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403 #define DARWIN_SECTION_ANCHORS 1
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404
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|
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405 /* PPC Darwin has to rename some of the long double builtins. */
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|
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406 #undef SUBTARGET_INIT_BUILTINS
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|
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407 #define SUBTARGET_INIT_BUILTINS \
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|
|
408 do { \
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|
|
409 darwin_patch_builtins (); \
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|
|
410 rs6000_builtin_decls[(unsigned) (RS6000_BUILTIN_CFSTRING)] \
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|
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411 = darwin_init_cfstring_builtins ((unsigned) (RS6000_BUILTIN_CFSTRING)); \
|
|
|
412 } while(0)
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|
|
413
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|
|
414 /* So far, there is no rs6000_fold_builtin, if one is introduced, then
|
|
|
415 this will need to be modified similar to the x86 case. */
|
|
|
416 #define TARGET_FOLD_BUILTIN SUBTARGET_FOLD_BUILTIN
|
|
|
417
|
|
|
418 /* Use standard DWARF numbering for DWARF debugging information. */
|
|
|
419 #define RS6000_USE_DWARF_NUMBERING
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|
|
420
|
