florian | 60637d2 | 2014-10-29 08:21:18 +0000 | [diff] [blame] | 1 | /* -*- mode: C; c-basic-offset: 3; -*- */ |
| 2 | |
| 3 | /*--------------------------------------------------------------------*/ |
| 4 | /*--- Compiler specific stuff. m_compiler.c ---*/ |
| 5 | /*--------------------------------------------------------------------*/ |
| 6 | |
| 7 | /* |
| 8 | This file is part of Valgrind, a dynamic binary instrumentation |
| 9 | framework. |
| 10 | |
Elliott Hughes | ed39800 | 2017-06-21 14:41:24 -0700 | [diff] [blame] | 11 | Copyright (C) 2014-2017 Florian Krohm |
florian | 60637d2 | 2014-10-29 08:21:18 +0000 | [diff] [blame] | 12 | florian@eich-krohm.de |
| 13 | |
| 14 | This program is free software; you can redistribute it and/or |
| 15 | modify it under the terms of the GNU General Public License as |
| 16 | published by the Free Software Foundation; either version 2 of the |
| 17 | License, or (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, but |
| 20 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 27 | 02111-1307, USA. |
| 28 | |
| 29 | The GNU General Public License is contained in the file COPYING. |
| 30 | */ |
| 31 | |
| 32 | /* Currently, this file provides definitions for builtins that not all |
| 33 | compilers or compiler versions provide. |
| 34 | |
| 35 | Missing builtins are rare. Therefore, no attempt has been made to |
| 36 | provide efficient implementations. |
| 37 | */ |
| 38 | |
| 39 | #include "config.h" |
| 40 | #include "pub_core_basics.h" |
florian | 4e94bda | 2014-10-29 13:57:49 +0000 | [diff] [blame] | 41 | #include "pub_core_libcbase.h" |
florian | bb1a787 | 2015-03-10 16:13:59 +0000 | [diff] [blame] | 42 | #include "pub_core_libcassert.h" |
| 43 | #include "pub_core_debuglog.h" |
florian | 60637d2 | 2014-10-29 08:21:18 +0000 | [diff] [blame] | 44 | |
| 45 | #ifndef HAVE_BUILTIN_POPCOUT |
| 46 | |
| 47 | /* From the GCC documentation: |
| 48 | Returns the number of 1-bits in x. */ |
| 49 | |
| 50 | UInt |
| 51 | __builtin_popcount(UInt x) |
| 52 | { |
| 53 | UInt i, count = 0; |
| 54 | |
| 55 | for (i = 0; i < 32; ++i) { |
| 56 | count += x & 1; |
| 57 | x >>= 1; |
| 58 | } |
| 59 | return count; |
| 60 | } |
| 61 | |
| 62 | UInt |
| 63 | __builtin_popcountll(ULong x) |
| 64 | { |
| 65 | UInt i, count = 0; |
| 66 | |
| 67 | for (i = 0; i < 64; ++i) { |
| 68 | count += x & 1; |
| 69 | x >>= 1; |
| 70 | } |
| 71 | return count; |
| 72 | } |
| 73 | #endif |
| 74 | |
| 75 | #ifndef HAVE_BUILTIN_CLZ |
| 76 | |
| 77 | /* From the GCC documentation: |
| 78 | Returns the number of leading 0-bits in x, starting at the most |
| 79 | significant position. If x is 0, the result is undefined. */ |
| 80 | |
| 81 | UInt |
| 82 | __builtin_clz(UInt x) |
| 83 | { |
| 84 | UInt count = 32; |
| 85 | UInt y; |
| 86 | |
| 87 | y = x >> 16; if (y != 0) { count -= 16; x = y; } |
| 88 | y = x >> 8; if (y != 0) { count -= 8; x = y; } |
| 89 | y = x >> 4; if (y != 0) { count -= 4; x = y; } |
| 90 | y = x >> 2; if (y != 0) { count -= 2; x = y; } |
| 91 | y = x >> 1; if (y != 0) return count - 2; |
| 92 | return count - x; |
| 93 | } |
| 94 | |
| 95 | UInt |
| 96 | __builtin_clzll(ULong x) |
| 97 | { |
| 98 | UInt count = 64; |
| 99 | ULong y; |
| 100 | |
| 101 | y = x >> 32; if (y != 0) { count -= 32; x = y; } |
| 102 | y = x >> 16; if (y != 0) { count -= 16; x = y; } |
| 103 | y = x >> 8; if (y != 0) { count -= 8; x = y; } |
| 104 | y = x >> 4; if (y != 0) { count -= 4; x = y; } |
| 105 | y = x >> 2; if (y != 0) { count -= 2; x = y; } |
| 106 | y = x >> 1; if (y != 0) return count - 2; |
| 107 | return count - x; |
| 108 | } |
| 109 | #endif |
| 110 | |
| 111 | #ifndef HAVE_BUILTIN_CTZ |
| 112 | |
| 113 | /* From the GCC documentation: |
| 114 | Returns the number of trailing 0-bits in x, starting at the least |
| 115 | significant bit position. If x is 0, the result is undefined. */ |
| 116 | |
| 117 | UInt |
| 118 | __builtin_ctz(UInt x) |
| 119 | { |
| 120 | UInt i, count = 0; |
| 121 | |
| 122 | for (i = 0; i < 32; ++i) { |
| 123 | if (x & 1) break; |
| 124 | ++count; |
| 125 | x >>= 1; |
| 126 | } |
| 127 | return count; |
| 128 | } |
| 129 | |
| 130 | UInt |
| 131 | __builtin_ctzll(ULong x) |
| 132 | { |
| 133 | UInt i, count = 0; |
| 134 | |
| 135 | for (i = 0; i < 64; ++i) { |
| 136 | if (x & 1) break; |
| 137 | ++count; |
| 138 | x >>= 1; |
| 139 | } |
| 140 | return count; |
| 141 | } |
| 142 | #endif |
| 143 | |
florian | 4e94bda | 2014-10-29 13:57:49 +0000 | [diff] [blame] | 144 | |
| 145 | #ifdef __INTEL_COMPILER |
| 146 | |
| 147 | /* Provide certain functions Intel's ICC compiler expects to be defined. */ |
| 148 | |
| 149 | void * |
florian | 50a3408 | 2015-01-20 18:46:13 +0000 | [diff] [blame] | 150 | __intel_memcpy(void *dest, const void *src, SizeT sz) |
| 151 | { |
| 152 | return VG_(memcpy)( dest, src, sz ); |
| 153 | } |
| 154 | |
| 155 | void * |
| 156 | __intel_mic_avx512f_memcpy(void *dest, const void *src, SizeT sz) |
| 157 | { |
| 158 | return VG_(memcpy)( dest, src, sz ); |
| 159 | } |
| 160 | |
| 161 | void * |
| 162 | __intel_new_memcpy(void *dest, const void *src, SizeT sz) |
florian | 923a81c | 2015-01-15 15:54:40 +0000 | [diff] [blame] | 163 | { |
| 164 | return VG_(memcpy)( dest, src, sz ); |
| 165 | } |
| 166 | |
| 167 | void * |
| 168 | __intel_ssse3_memcpy(void *dest, const void *src, SizeT sz) |
| 169 | { |
| 170 | return VG_(memcpy)( dest, src, sz ); |
| 171 | } |
| 172 | |
florian | 50a3408 | 2015-01-20 18:46:13 +0000 | [diff] [blame] | 173 | void * |
| 174 | __intel_ssse3_rep_memcpy(void *dest, const void *src, SizeT sz) |
| 175 | { |
| 176 | return VG_(memcpy)( dest, src, sz ); |
| 177 | } |
florian | 923a81c | 2015-01-15 15:54:40 +0000 | [diff] [blame] | 178 | |
| 179 | void * |
florian | 4e94bda | 2014-10-29 13:57:49 +0000 | [diff] [blame] | 180 | _intel_fast_memcpy(void *dest, const void *src, SizeT sz) |
| 181 | { |
| 182 | return VG_(memcpy)( dest, src, sz ); |
| 183 | } |
| 184 | |
| 185 | void * |
florian | 50a3408 | 2015-01-20 18:46:13 +0000 | [diff] [blame] | 186 | __intel_lrb_memcpy(void *dest, const void *src, SizeT sz) |
| 187 | { |
| 188 | return VG_(memcpy)( dest, src, sz ); |
| 189 | } |
| 190 | |
| 191 | void * |
| 192 | __intel_memset(void *dest, int value, SizeT num) |
| 193 | { |
| 194 | return VG_(memset)( dest, value, num ); |
| 195 | } |
| 196 | |
| 197 | void * |
| 198 | __intel_new_memset(void *dest, int value, SizeT num) |
| 199 | { |
| 200 | return VG_(memset)( dest, value, num ); |
| 201 | } |
| 202 | |
| 203 | void * |
| 204 | __intel_mic_avx512f_memset(void *dest, int value, SizeT num) |
| 205 | { |
| 206 | return VG_(memset)( dest, value, num ); |
| 207 | } |
| 208 | |
| 209 | void * |
| 210 | __intel_lrb_memset(void *dest, int value, SizeT num) |
| 211 | { |
| 212 | return VG_(memset)( dest, value, num ); |
| 213 | } |
| 214 | |
| 215 | void * |
florian | 4e94bda | 2014-10-29 13:57:49 +0000 | [diff] [blame] | 216 | _intel_fast_memset(void *dest, int value, SizeT num) |
| 217 | { |
| 218 | return VG_(memset)( dest, value, num ); |
| 219 | } |
florian | 923a81c | 2015-01-15 15:54:40 +0000 | [diff] [blame] | 220 | |
florian | 4e94bda | 2014-10-29 13:57:49 +0000 | [diff] [blame] | 221 | #endif |
| 222 | |
florian | bb1a787 | 2015-03-10 16:13:59 +0000 | [diff] [blame] | 223 | |
| 224 | /*====================================================================*/ |
| 225 | /*=== gcc -fsanitize=undefined helper function support ===*/ |
| 226 | /*====================================================================*/ |
| 227 | |
| 228 | void __ubsan_handle_type_mismatch ( void ); |
| 229 | void __ubsan_handle_type_mismatch ( void ) |
| 230 | { |
| 231 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 232 | vg_assert(0); |
| 233 | } |
| 234 | |
| 235 | void __ubsan_handle_mul_overflow ( void ); |
| 236 | void __ubsan_handle_mul_overflow ( void ) |
| 237 | { |
| 238 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 239 | vg_assert(0); |
| 240 | } |
| 241 | |
| 242 | void __ubsan_handle_add_overflow ( void ); |
| 243 | void __ubsan_handle_add_overflow ( void ) |
| 244 | { |
| 245 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 246 | vg_assert(0); |
| 247 | } |
| 248 | |
| 249 | void __ubsan_handle_sub_overflow ( void ); |
| 250 | void __ubsan_handle_sub_overflow ( void ) |
| 251 | { |
| 252 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 253 | vg_assert(0); |
| 254 | } |
| 255 | |
| 256 | void __ubsan_handle_divrem_overflow ( void ); |
| 257 | void __ubsan_handle_divrem_overflow ( void ) |
| 258 | { |
| 259 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 260 | vg_assert(0); |
| 261 | } |
| 262 | |
| 263 | void __ubsan_handle_negate_overflow ( void ); |
| 264 | void __ubsan_handle_negate_overflow ( void ) |
| 265 | { |
| 266 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 267 | vg_assert(0); |
| 268 | } |
| 269 | |
| 270 | void __ubsan_handle_out_of_bounds ( void ); |
| 271 | void __ubsan_handle_out_of_bounds ( void ) |
| 272 | { |
| 273 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 274 | vg_assert(0); |
| 275 | } |
| 276 | |
| 277 | void __ubsan_handle_shift_out_of_bounds ( void ); |
| 278 | void __ubsan_handle_shift_out_of_bounds ( void ) |
| 279 | { |
| 280 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 281 | vg_assert(0); |
| 282 | } |
| 283 | |
| 284 | void __ubsan_handle_vla_bound_not_positive ( void ); |
| 285 | void __ubsan_handle_vla_bound_not_positive ( void ) |
| 286 | { |
| 287 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 288 | vg_assert(0); |
| 289 | } |
| 290 | |
| 291 | void __ubsan_handle_nonnull_arg ( void ); |
| 292 | void __ubsan_handle_nonnull_arg ( void ) |
| 293 | { |
| 294 | VG_(debugLog)(0, "main:ubsan", "In %s", __func__); |
| 295 | vg_assert(0); |
| 296 | } |
| 297 | |
florian | 60637d2 | 2014-10-29 08:21:18 +0000 | [diff] [blame] | 298 | /*--------------------------------------------------------------------*/ |
| 299 | /*--- end ---*/ |
| 300 | /*--------------------------------------------------------------------*/ |