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111
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1 /* Target-specific code for C family languages.
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145
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2 Copyright (C) 2015-2020 Free Software Foundation, Inc.
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111
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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131
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20 #define IN_TARGET_CODE 1
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21
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111
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22 #include "config.h"
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23 #include "system.h"
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24 #include "coretypes.h"
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25 #include "tm.h"
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26 #include "input.h"
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27 #include "memmodel.h"
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28 #include "tm_p.h"
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29 #include "flags.h"
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30 #include "c-family/c-common.h"
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31 #include "cpplib.h"
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32 #include "c-family/c-pragma.h"
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33 #include "langhooks.h"
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34 #include "target.h"
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35
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36
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37 #define builtin_define(TXT) cpp_define (pfile, TXT)
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38 #define builtin_assert(TXT) cpp_assert (pfile, TXT)
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39
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40
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41 static void
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42 aarch64_def_or_undef (bool def_p, const char *macro, cpp_reader *pfile)
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43 {
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44 if (def_p)
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45 cpp_define (pfile, macro);
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46 else
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47 cpp_undef (pfile, macro);
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48 }
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49
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50 /* Define the macros that we always expect to have on AArch64. */
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51
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52 static void
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53 aarch64_define_unconditional_macros (cpp_reader *pfile)
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54 {
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55 builtin_define ("__aarch64__");
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56 builtin_define ("__ARM_64BIT_STATE");
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57
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58 builtin_define ("__ARM_ARCH_ISA_A64");
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59 builtin_define_with_int_value ("__ARM_ALIGN_MAX_PWR", 28);
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60 builtin_define_with_int_value ("__ARM_ALIGN_MAX_STACK_PWR", 16);
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61
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62 /* __ARM_ARCH_8A is not mandated by ACLE but we define it unconditionally
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63 as interoperability with the same arm macro. */
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64 builtin_define ("__ARM_ARCH_8A");
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65
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66 builtin_define_with_int_value ("__ARM_ARCH_PROFILE", 'A');
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67 builtin_define ("__ARM_FEATURE_CLZ");
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68 builtin_define ("__ARM_FEATURE_IDIV");
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69 builtin_define ("__ARM_FEATURE_UNALIGNED");
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70 builtin_define ("__ARM_PCS_AAPCS64");
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71 builtin_define_with_int_value ("__ARM_SIZEOF_WCHAR_T", WCHAR_TYPE_SIZE / 8);
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145
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72
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73 builtin_define ("__GCC_ASM_FLAG_OUTPUTS__");
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111
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74 }
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75
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76 /* Undefine/redefine macros that depend on the current backend state and may
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77 need to change when a target pragma modifies the backend state. */
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78
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79 static void
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80 aarch64_update_cpp_builtins (cpp_reader *pfile)
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81 {
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82 aarch64_def_or_undef (flag_unsafe_math_optimizations, "__ARM_FP_FAST", pfile);
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83
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84 builtin_define_with_int_value ("__ARM_ARCH", aarch64_architecture_version);
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85
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86 builtin_define_with_int_value ("__ARM_SIZEOF_MINIMAL_ENUM",
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87 flag_short_enums ? 1 : 4);
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88 aarch64_def_or_undef (TARGET_BIG_END, "__AARCH64EB__", pfile);
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89 aarch64_def_or_undef (TARGET_BIG_END, "__ARM_BIG_ENDIAN", pfile);
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90 aarch64_def_or_undef (!TARGET_BIG_END, "__AARCH64EL__", pfile);
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91
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92 aarch64_def_or_undef (TARGET_FLOAT, "__ARM_FEATURE_FMA", pfile);
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93
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94 if (TARGET_FLOAT || TARGET_SIMD)
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95 {
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96 builtin_define_with_int_value ("__ARM_FP", 0x0E);
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97 builtin_define ("__ARM_FP16_FORMAT_IEEE");
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98 builtin_define ("__ARM_FP16_ARGS");
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99 }
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100 else
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101 cpp_undef (pfile, "__ARM_FP");
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102
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103 aarch64_def_or_undef (TARGET_FP_F16INST,
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104 "__ARM_FEATURE_FP16_SCALAR_ARITHMETIC", pfile);
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105 aarch64_def_or_undef (TARGET_SIMD_F16INST,
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106 "__ARM_FEATURE_FP16_VECTOR_ARITHMETIC", pfile);
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107
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108 aarch64_def_or_undef (TARGET_SIMD, "__ARM_FEATURE_NUMERIC_MAXMIN", pfile);
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109 aarch64_def_or_undef (TARGET_SIMD, "__ARM_NEON", pfile);
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110
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111
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112 aarch64_def_or_undef (TARGET_CRC32, "__ARM_FEATURE_CRC32", pfile);
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113 aarch64_def_or_undef (TARGET_DOTPROD, "__ARM_FEATURE_DOTPROD", pfile);
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145
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114 aarch64_def_or_undef (TARGET_COMPLEX, "__ARM_FEATURE_COMPLEX", pfile);
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115 aarch64_def_or_undef (TARGET_JSCVT, "__ARM_FEATURE_JCVT", pfile);
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111
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116
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117 cpp_undef (pfile, "__AARCH64_CMODEL_TINY__");
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118 cpp_undef (pfile, "__AARCH64_CMODEL_SMALL__");
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119 cpp_undef (pfile, "__AARCH64_CMODEL_LARGE__");
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120
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121 switch (aarch64_cmodel)
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122 {
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123 case AARCH64_CMODEL_TINY:
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124 case AARCH64_CMODEL_TINY_PIC:
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125 builtin_define ("__AARCH64_CMODEL_TINY__");
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126 break;
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127 case AARCH64_CMODEL_SMALL:
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128 case AARCH64_CMODEL_SMALL_PIC:
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129 builtin_define ("__AARCH64_CMODEL_SMALL__");
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130 break;
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131 case AARCH64_CMODEL_LARGE:
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132 builtin_define ("__AARCH64_CMODEL_LARGE__");
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133 break;
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134 default:
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135 break;
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136 }
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137
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138 aarch64_def_or_undef (TARGET_ILP32, "_ILP32", pfile);
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139 aarch64_def_or_undef (TARGET_ILP32, "__ILP32__", pfile);
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140
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141 aarch64_def_or_undef (TARGET_CRYPTO, "__ARM_FEATURE_CRYPTO", pfile);
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142 aarch64_def_or_undef (TARGET_SIMD_RDMA, "__ARM_FEATURE_QRDMX", pfile);
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131
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143 aarch64_def_or_undef (TARGET_SVE, "__ARM_FEATURE_SVE", pfile);
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144 cpp_undef (pfile, "__ARM_FEATURE_SVE_BITS");
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145 if (TARGET_SVE)
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146 {
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147 int bits;
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148 if (!BITS_PER_SVE_VECTOR.is_constant (&bits))
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149 bits = 0;
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150 builtin_define_with_int_value ("__ARM_FEATURE_SVE_BITS", bits);
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151 }
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145
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152 aarch64_def_or_undef (TARGET_SVE_I8MM,
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153 "__ARM_FEATURE_SVE_MATMUL_INT8", pfile);
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154 aarch64_def_or_undef (TARGET_SVE_F32MM,
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155 "__ARM_FEATURE_SVE_MATMUL_FP32", pfile);
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156 aarch64_def_or_undef (TARGET_SVE_F64MM,
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157 "__ARM_FEATURE_SVE_MATMUL_FP64", pfile);
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158 aarch64_def_or_undef (TARGET_SVE2, "__ARM_FEATURE_SVE2", pfile);
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159 aarch64_def_or_undef (TARGET_SVE2_AES, "__ARM_FEATURE_SVE2_AES", pfile);
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160 aarch64_def_or_undef (TARGET_SVE2_BITPERM,
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161 "__ARM_FEATURE_SVE2_BITPERM", pfile);
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162 aarch64_def_or_undef (TARGET_SVE2_SHA3, "__ARM_FEATURE_SVE2_SHA3", pfile);
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163 aarch64_def_or_undef (TARGET_SVE2_SM4, "__ARM_FEATURE_SVE2_SM4", pfile);
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131
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164
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145
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165 aarch64_def_or_undef (TARGET_LSE, "__ARM_FEATURE_ATOMICS", pfile);
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131
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166 aarch64_def_or_undef (TARGET_AES, "__ARM_FEATURE_AES", pfile);
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167 aarch64_def_or_undef (TARGET_SHA2, "__ARM_FEATURE_SHA2", pfile);
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168 aarch64_def_or_undef (TARGET_SHA3, "__ARM_FEATURE_SHA3", pfile);
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169 aarch64_def_or_undef (TARGET_SHA3, "__ARM_FEATURE_SHA512", pfile);
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170 aarch64_def_or_undef (TARGET_SM4, "__ARM_FEATURE_SM3", pfile);
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171 aarch64_def_or_undef (TARGET_SM4, "__ARM_FEATURE_SM4", pfile);
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172 aarch64_def_or_undef (TARGET_F16FML, "__ARM_FEATURE_FP16_FML", pfile);
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111
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173
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145
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174 aarch64_def_or_undef (TARGET_FRINT, "__ARM_FEATURE_FRINT", pfile);
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175 aarch64_def_or_undef (TARGET_TME, "__ARM_FEATURE_TME", pfile);
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176 aarch64_def_or_undef (TARGET_RNG, "__ARM_FEATURE_RNG", pfile);
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177 aarch64_def_or_undef (TARGET_MEMTAG, "__ARM_FEATURE_MEMORY_TAGGING", pfile);
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178
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179 aarch64_def_or_undef (TARGET_I8MM, "__ARM_FEATURE_MATMUL_INT8", pfile);
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180 aarch64_def_or_undef (TARGET_BF16_SIMD,
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181 "__ARM_FEATURE_BF16_VECTOR_ARITHMETIC", pfile);
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182 aarch64_def_or_undef (TARGET_BF16_FP,
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183 "__ARM_FEATURE_BF16_SCALAR_ARITHMETIC", pfile);
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184
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111
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185 /* Not for ACLE, but required to keep "float.h" correct if we switch
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186 target between implementations that do or do not support ARMv8.2-A
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187 16-bit floating-point extensions. */
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188 cpp_undef (pfile, "__FLT_EVAL_METHOD__");
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189 builtin_define_with_int_value ("__FLT_EVAL_METHOD__",
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190 c_flt_eval_method (true));
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191 cpp_undef (pfile, "__FLT_EVAL_METHOD_C99__");
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192 builtin_define_with_int_value ("__FLT_EVAL_METHOD_C99__",
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193 c_flt_eval_method (false));
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194 }
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195
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196 /* Implement TARGET_CPU_CPP_BUILTINS. */
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197
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198 void
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199 aarch64_cpu_cpp_builtins (cpp_reader *pfile)
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200 {
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201 aarch64_define_unconditional_macros (pfile);
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202 aarch64_update_cpp_builtins (pfile);
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203 }
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204
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205 /* Hook to validate the current #pragma GCC target and set the state, and
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206 update the macros based on what was changed. If ARGS is NULL, then
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207 POP_TARGET is used to reset the options. */
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208
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209 static bool
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210 aarch64_pragma_target_parse (tree args, tree pop_target)
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211 {
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212 /* If args is not NULL then process it and setup the target-specific
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213 information that it specifies. */
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214 if (args)
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215 {
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131
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216 if (!aarch64_process_target_attr (args))
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111
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217 return false;
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218
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219 aarch64_override_options_internal (&global_options);
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220 }
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221
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222 /* args is NULL, restore to the state described in pop_target. */
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223 else
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224 {
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225 pop_target = pop_target ? pop_target : target_option_default_node;
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226 cl_target_option_restore (&global_options,
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227 TREE_TARGET_OPTION (pop_target));
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228 }
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229
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230 target_option_current_node
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231 = build_target_option_node (&global_options);
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232
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233 aarch64_reset_previous_fndecl ();
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234 /* For the definitions, ensure all newly defined macros are considered
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235 as used for -Wunused-macros. There is no point warning about the
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236 compiler predefined macros. */
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237 cpp_options *cpp_opts = cpp_get_options (parse_in);
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238 unsigned char saved_warn_unused_macros = cpp_opts->warn_unused_macros;
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239 cpp_opts->warn_unused_macros = 0;
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240
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241 aarch64_update_cpp_builtins (parse_in);
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242
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243 cpp_opts->warn_unused_macros = saved_warn_unused_macros;
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244
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245 /* If we're popping or reseting make sure to update the globals so that
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246 the optab availability predicates get recomputed. */
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247 if (pop_target)
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248 aarch64_save_restore_target_globals (pop_target);
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249
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250 /* Initialize SIMD builtins if we haven't already.
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251 Set current_target_pragma to NULL for the duration so that
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252 the builtin initialization code doesn't try to tag the functions
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253 being built with the attributes specified by any current pragma, thus
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254 going into an infinite recursion. */
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255 if (TARGET_SIMD)
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256 {
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257 tree saved_current_target_pragma = current_target_pragma;
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258 current_target_pragma = NULL;
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259 aarch64_init_simd_builtins ();
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260 current_target_pragma = saved_current_target_pragma;
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261 }
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262
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263 return true;
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264 }
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265
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145
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266 /* Implement "#pragma GCC aarch64". */
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267 static void
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268 aarch64_pragma_aarch64 (cpp_reader *)
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269 {
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270 tree x;
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271 if (pragma_lex (&x) != CPP_STRING)
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272 {
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273 error ("%<#pragma GCC aarch64%> requires a string parameter");
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274 return;
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275 }
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276
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277 const char *name = TREE_STRING_POINTER (x);
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278 if (strcmp (name, "arm_sve.h") == 0)
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279 aarch64_sve::handle_arm_sve_h ();
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280 else
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281 error ("unknown %<#pragma GCC aarch64%> option %qs", name);
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282 }
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283
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284 /* Implement TARGET_RESOLVE_OVERLOADED_BUILTIN. */
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285 static tree
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286 aarch64_resolve_overloaded_builtin (unsigned int uncast_location,
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287 tree fndecl, void *uncast_arglist)
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288 {
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289 vec<tree, va_gc> empty = {};
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290 location_t location = (location_t) uncast_location;
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291 vec<tree, va_gc> *arglist = (uncast_arglist
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292 ? (vec<tree, va_gc> *) uncast_arglist
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293 : &empty);
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294 unsigned int code = DECL_MD_FUNCTION_CODE (fndecl);
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295 unsigned int subcode = code >> AARCH64_BUILTIN_SHIFT;
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296 tree new_fndecl;
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297 switch (code & AARCH64_BUILTIN_CLASS)
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298 {
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299 case AARCH64_BUILTIN_GENERAL:
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300 return aarch64_resolve_overloaded_builtin_general (location, fndecl,
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301 uncast_arglist);
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302 case AARCH64_BUILTIN_SVE:
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303 new_fndecl = aarch64_sve::resolve_overloaded_builtin (location, subcode,
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304 arglist);
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305 break;
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306 }
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307 if (new_fndecl == NULL_TREE || new_fndecl == error_mark_node)
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308 return new_fndecl;
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309 return build_function_call_vec (location, vNULL, new_fndecl, arglist,
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310 NULL, fndecl);
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311 }
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312
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313 /* Implement TARGET_CHECK_BUILTIN_CALL. */
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314 static bool
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315 aarch64_check_builtin_call (location_t loc, vec<location_t> arg_loc,
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316 tree fndecl, tree orig_fndecl,
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317 unsigned int nargs, tree *args)
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318 {
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319 unsigned int code = DECL_MD_FUNCTION_CODE (fndecl);
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320 unsigned int subcode = code >> AARCH64_BUILTIN_SHIFT;
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321 switch (code & AARCH64_BUILTIN_CLASS)
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322 {
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323 case AARCH64_BUILTIN_GENERAL:
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324 return true;
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325
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326 case AARCH64_BUILTIN_SVE:
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327 return aarch64_sve::check_builtin_call (loc, arg_loc, subcode,
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328 orig_fndecl, nargs, args);
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329 }
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330 gcc_unreachable ();
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331 }
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332
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111
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333 /* Implement REGISTER_TARGET_PRAGMAS. */
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334
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335 void
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336 aarch64_register_pragmas (void)
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337 {
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338 /* Update pragma hook to allow parsing #pragma GCC target. */
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339 targetm.target_option.pragma_parse = aarch64_pragma_target_parse;
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145
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340
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341 targetm.resolve_overloaded_builtin = aarch64_resolve_overloaded_builtin;
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342 targetm.check_builtin_call = aarch64_check_builtin_call;
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343
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344 c_register_pragma ("GCC", "aarch64", aarch64_pragma_aarch64);
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111
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345 }
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