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1 | /** @file\r |
| 2 | Bit field functions of BaseLib.\r |
| 3 | \r |
| 4 | Copyright (c) 2006, Intel Corporation<BR>\r |
| 5 | All rights reserved. This program and the accompanying materials\r |
| 6 | are licensed and made available under the terms and conditions of the BSD License\r |
| 7 | which accompanies this distribution. The full text of the license may be found at\r |
| 8 | http://opensource.org/licenses/bsd-license.php\r |
| 9 | \r |
| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| 12 | \r |
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13 | **/\r |
| 14 | \r |
| 1efcc4ae |
15 | \r |
| f734a10a |
16 | \r |
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17 | \r |
| 18 | #include "BaseLibInternals.h"\r |
| 19 | \r |
| 20 | /**\r |
| 21 | Worker function that returns a bit field from Operand\r |
| 22 | \r |
| 23 | Returns the bitfield specified by the StartBit and the EndBit from Operand.\r |
| 24 | \r |
| 25 | @param Operand Operand on which to perform the bitfield operation.\r |
| 26 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 27 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 28 | \r |
| 29 | @return The bit field read.\r |
| 30 | \r |
| 31 | **/\r |
| 32 | unsigned int\r |
| 38bbd3d9 |
33 | EFIAPI\r |
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34 | BitFieldReadUint (\r |
| 35 | IN unsigned int Operand,\r |
| 36 | IN UINTN StartBit,\r |
| 37 | IN UINTN EndBit\r |
| 38 | )\r |
| 39 | {\r |
| 40 | //\r |
| 41 | // ~((unsigned int)-2 << EndBit) is a mask in which bit[0] thru bit[EndBit]\r |
| 42 | // are 1's while bit[EndBit + 1] thru the most significant bit are 0's.\r |
| 43 | //\r |
| 44 | return (Operand & ~((unsigned int)-2 << EndBit)) >> StartBit;\r |
| 45 | }\r |
| 46 | \r |
| 47 | /**\r |
| 48 | Worker function that reads a bit field from Operand, performs a bitwise OR, \r |
| 49 | and returns the result.\r |
| 50 | \r |
| 51 | Performs a bitwise OR between the bit field specified by StartBit and EndBit\r |
| 52 | in Operand and the value specified by AndData. All other bits in Operand are\r |
| 53 | preserved. The new value is returned.\r |
| 54 | \r |
| 55 | @param Operand Operand on which to perform the bitfield operation.\r |
| 56 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 57 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 58 | @param OrData The value to OR with the read value from the value\r |
| 59 | \r |
| 60 | @return The new value.\r |
| 61 | \r |
| 62 | **/\r |
| 63 | unsigned int\r |
| 38bbd3d9 |
64 | EFIAPI\r |
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65 | BitFieldOrUint (\r |
| 66 | IN unsigned int Operand,\r |
| 67 | IN UINTN StartBit,\r |
| 68 | IN UINTN EndBit,\r |
| 69 | IN unsigned int OrData\r |
| 70 | )\r |
| 71 | {\r |
| 72 | //\r |
| 73 | // ~((unsigned int)-2 << EndBit) is a mask in which bit[0] thru bit[EndBit]\r |
| 74 | // are 1's while bit[EndBit + 1] thru the most significant bit are 0's.\r |
| 75 | //\r |
| 76 | return Operand | ((OrData << StartBit) & ~((unsigned int) -2 << EndBit));\r |
| 77 | }\r |
| 78 | \r |
| 79 | /**\r |
| 80 | Worker function that reads a bit field from Operand, performs a bitwise AND, \r |
| 81 | and returns the result.\r |
| 82 | \r |
| 83 | Performs a bitwise AND between the bit field specified by StartBit and EndBit\r |
| 84 | in Operand and the value specified by AndData. All other bits in Operand are\r |
| 85 | preserved. The new value is returned.\r |
| 86 | \r |
| 87 | @param Operand Operand on which to perform the bitfield operation.\r |
| 88 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 89 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 90 | @param AndData The value to And with the read value from the value\r |
| 91 | \r |
| 92 | @return The new value.\r |
| 93 | \r |
| 94 | **/\r |
| 95 | unsigned int\r |
| 38bbd3d9 |
96 | EFIAPI\r |
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97 | BitFieldAndUint (\r |
| 98 | IN unsigned int Operand,\r |
| 99 | IN UINTN StartBit,\r |
| 100 | IN UINTN EndBit,\r |
| 101 | IN unsigned int AndData\r |
| 102 | )\r |
| 103 | {\r |
| 104 | //\r |
| 105 | // ~((unsigned int)-2 << EndBit) is a mask in which bit[0] thru bit[EndBit]\r |
| 106 | // are 1's while bit[EndBit + 1] thru the most significant bit are 0's.\r |
| 107 | //\r |
| 108 | return Operand & ~((~AndData << StartBit) & ~((unsigned int) -2 << EndBit));\r |
| 109 | }\r |
| 110 | \r |
| 111 | /**\r |
| 112 | Returns a bit field from an 8-bit value.\r |
| 113 | \r |
| 114 | Returns the bitfield specified by the StartBit and the EndBit from Operand.\r |
| 115 | \r |
| 116 | If 8-bit operations are not supported, then ASSERT().\r |
| 117 | If StartBit is greater than 7, then ASSERT().\r |
| 118 | If EndBit is greater than 7, then ASSERT().\r |
| 119 | If EndBit is less than StartBit, then ASSERT().\r |
| 120 | \r |
| 121 | @param Operand Operand on which to perform the bitfield operation.\r |
| 122 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 123 | Range 0..7.\r |
| 124 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 125 | Range 0..7.\r |
| 126 | \r |
| 127 | @return The bit field read.\r |
| 128 | \r |
| 129 | **/\r |
| 130 | UINT8\r |
| 131 | EFIAPI\r |
| 132 | BitFieldRead8 (\r |
| 133 | IN UINT8 Operand,\r |
| 134 | IN UINTN StartBit,\r |
| 135 | IN UINTN EndBit\r |
| 136 | )\r |
| 137 | {\r |
| 138 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 139 | ASSERT (StartBit <= EndBit);\r |
| 140 | return (UINT8)BitFieldReadUint (Operand, StartBit, EndBit);\r |
| 141 | }\r |
| 142 | \r |
| 143 | /**\r |
| 144 | Writes a bit field to an 8-bit value, and returns the result.\r |
| 145 | \r |
| 146 | Writes Value to the bit field specified by the StartBit and the EndBit in\r |
| 147 | Operand. All other bits in Operand are preserved. The new 8-bit value is\r |
| 148 | returned.\r |
| 149 | \r |
| 150 | If 8-bit operations are not supported, then ASSERT().\r |
| 151 | If StartBit is greater than 7, then ASSERT().\r |
| 152 | If EndBit is greater than 7, then ASSERT().\r |
| 153 | If EndBit is less than StartBit, then ASSERT().\r |
| 154 | \r |
| 155 | @param Operand Operand on which to perform the bitfield operation.\r |
| 156 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 157 | Range 0..7.\r |
| 158 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 159 | Range 0..7.\r |
| 160 | @param Value New value of the bit field.\r |
| 161 | \r |
| 162 | @return The new 8-bit value.\r |
| 163 | \r |
| 164 | **/\r |
| 165 | UINT8\r |
| 166 | EFIAPI\r |
| 167 | BitFieldWrite8 (\r |
| 168 | IN UINT8 Operand,\r |
| 169 | IN UINTN StartBit,\r |
| 170 | IN UINTN EndBit,\r |
| 171 | IN UINT8 Value\r |
| 172 | )\r |
| 173 | {\r |
| 174 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 175 | ASSERT (StartBit <= EndBit);\r |
| 176 | return BitFieldAndThenOr8 (Operand, StartBit, EndBit, 0, Value);\r |
| 177 | }\r |
| 178 | \r |
| 179 | /**\r |
| 180 | Reads a bit field from an 8-bit value, performs a bitwise OR, and returns the\r |
| 181 | result.\r |
| 182 | \r |
| 183 | Performs a bitwise inclusive OR between the bit field specified by StartBit\r |
| 184 | and EndBit in Operand and the value specified by OrData. All other bits in\r |
| 185 | Operand are preserved. The new 8-bit value is returned.\r |
| 186 | \r |
| 187 | If 8-bit operations are not supported, then ASSERT().\r |
| 188 | If StartBit is greater than 7, then ASSERT().\r |
| 189 | If EndBit is greater than 7, then ASSERT().\r |
| 190 | If EndBit is less than StartBit, then ASSERT().\r |
| 191 | \r |
| 192 | @param Operand Operand on which to perform the bitfield operation.\r |
| 193 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 194 | Range 0..7.\r |
| 195 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 196 | Range 0..7.\r |
| 197 | @param OrData The value to OR with the read value from the value\r |
| 198 | \r |
| 199 | @return The new 8-bit value.\r |
| 200 | \r |
| 201 | **/\r |
| 202 | UINT8\r |
| 203 | EFIAPI\r |
| 204 | BitFieldOr8 (\r |
| 205 | IN UINT8 Operand,\r |
| 206 | IN UINTN StartBit,\r |
| 207 | IN UINTN EndBit,\r |
| 208 | IN UINT8 OrData\r |
| 209 | )\r |
| 210 | {\r |
| 211 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 212 | ASSERT (StartBit <= EndBit);\r |
| 213 | return (UINT8)BitFieldOrUint (Operand, StartBit, EndBit, OrData);\r |
| 214 | }\r |
| 215 | \r |
| 216 | /**\r |
| 217 | Reads a bit field from an 8-bit value, performs a bitwise AND, and returns\r |
| 218 | the result.\r |
| 219 | \r |
| 220 | Performs a bitwise AND between the bit field specified by StartBit and EndBit\r |
| 221 | in Operand and the value specified by AndData. All other bits in Operand are\r |
| 222 | preserved. The new 8-bit value is returned.\r |
| 223 | \r |
| 224 | If 8-bit operations are not supported, then ASSERT().\r |
| 225 | If StartBit is greater than 7, then ASSERT().\r |
| 226 | If EndBit is greater than 7, then ASSERT().\r |
| 227 | If EndBit is less than StartBit, then ASSERT().\r |
| 228 | \r |
| 229 | @param Operand Operand on which to perform the bitfield operation.\r |
| 230 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 231 | Range 0..7.\r |
| 232 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 233 | Range 0..7.\r |
| 234 | @param AndData The value to AND with the read value from the value.\r |
| 235 | \r |
| 236 | @return The new 8-bit value.\r |
| 237 | \r |
| 238 | **/\r |
| 239 | UINT8\r |
| 240 | EFIAPI\r |
| 241 | BitFieldAnd8 (\r |
| 242 | IN UINT8 Operand,\r |
| 243 | IN UINTN StartBit,\r |
| 244 | IN UINTN EndBit,\r |
| 245 | IN UINT8 AndData\r |
| 246 | )\r |
| 247 | {\r |
| 248 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 249 | ASSERT (StartBit <= EndBit);\r |
| 250 | return (UINT8)BitFieldAndUint (Operand, StartBit, EndBit, AndData);\r |
| 251 | }\r |
| 252 | \r |
| 253 | /**\r |
| 254 | Reads a bit field from an 8-bit value, performs a bitwise AND followed by a\r |
| 255 | bitwise OR, and returns the result.\r |
| 256 | \r |
| 257 | Performs a bitwise AND between the bit field specified by StartBit and EndBit\r |
| 258 | in Operand and the value specified by AndData, followed by a bitwise\r |
| 259 | inclusive OR with value specified by OrData. All other bits in Operand are\r |
| 260 | preserved. The new 8-bit value is returned.\r |
| 261 | \r |
| 262 | If 8-bit operations are not supported, then ASSERT().\r |
| 263 | If StartBit is greater than 7, then ASSERT().\r |
| 264 | If EndBit is greater than 7, then ASSERT().\r |
| 265 | If EndBit is less than StartBit, then ASSERT().\r |
| 266 | \r |
| 267 | @param Operand Operand on which to perform the bitfield operation.\r |
| 268 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 269 | Range 0..7.\r |
| 270 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 271 | Range 0..7.\r |
| 272 | @param AndData The value to AND with the read value from the value.\r |
| 273 | @param OrData The value to OR with the result of the AND operation.\r |
| 274 | \r |
| 275 | @return The new 8-bit value.\r |
| 276 | \r |
| 277 | **/\r |
| 278 | UINT8\r |
| 279 | EFIAPI\r |
| 280 | BitFieldAndThenOr8 (\r |
| 281 | IN UINT8 Operand,\r |
| 282 | IN UINTN StartBit,\r |
| 283 | IN UINTN EndBit,\r |
| 284 | IN UINT8 AndData,\r |
| 285 | IN UINT8 OrData\r |
| 286 | )\r |
| 287 | {\r |
| 288 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 289 | ASSERT (StartBit <= EndBit);\r |
| 290 | return BitFieldOr8 (\r |
| 291 | BitFieldAnd8 (Operand, StartBit, EndBit, AndData),\r |
| 292 | StartBit,\r |
| 293 | EndBit,\r |
| 294 | OrData\r |
| 295 | );\r |
| 296 | }\r |
| 297 | \r |
| 298 | /**\r |
| 299 | Returns a bit field from a 16-bit value.\r |
| 300 | \r |
| 301 | Returns the bitfield specified by the StartBit and the EndBit from Operand.\r |
| 302 | \r |
| 303 | If 16-bit operations are not supported, then ASSERT().\r |
| 304 | If StartBit is greater than 15, then ASSERT().\r |
| 305 | If EndBit is greater than 15, then ASSERT().\r |
| 306 | If EndBit is less than StartBit, then ASSERT().\r |
| 307 | \r |
| 308 | @param Operand Operand on which to perform the bitfield operation.\r |
| 309 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 310 | Range 0..15.\r |
| 311 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 312 | Range 0..15.\r |
| 313 | \r |
| 314 | @return The bit field read.\r |
| 315 | \r |
| 316 | **/\r |
| 317 | UINT16\r |
| 318 | EFIAPI\r |
| 319 | BitFieldRead16 (\r |
| 320 | IN UINT16 Operand,\r |
| 321 | IN UINTN StartBit,\r |
| 322 | IN UINTN EndBit\r |
| 323 | )\r |
| 324 | {\r |
| 325 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 326 | ASSERT (StartBit <= EndBit);\r |
| 327 | return (UINT16)BitFieldReadUint (Operand, StartBit, EndBit);\r |
| 328 | }\r |
| 329 | \r |
| 330 | /**\r |
| 331 | Writes a bit field to a 16-bit value, and returns the result.\r |
| 332 | \r |
| 333 | Writes Value to the bit field specified by the StartBit and the EndBit in\r |
| 334 | Operand. All other bits in Operand are preserved. The new 16-bit value is\r |
| 335 | returned.\r |
| 336 | \r |
| 337 | If 16-bit operations are not supported, then ASSERT().\r |
| 338 | If StartBit is greater than 15, then ASSERT().\r |
| 339 | If EndBit is greater than 15, then ASSERT().\r |
| 340 | If EndBit is less than StartBit, then ASSERT().\r |
| 341 | \r |
| 342 | @param Operand Operand on which to perform the bitfield operation.\r |
| 343 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 344 | Range 0..15.\r |
| 345 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 346 | Range 0..15.\r |
| 347 | @param Value New value of the bit field.\r |
| 348 | \r |
| 349 | @return The new 16-bit value.\r |
| 350 | \r |
| 351 | **/\r |
| 352 | UINT16\r |
| 353 | EFIAPI\r |
| 354 | BitFieldWrite16 (\r |
| 355 | IN UINT16 Operand,\r |
| 356 | IN UINTN StartBit,\r |
| 357 | IN UINTN EndBit,\r |
| 358 | IN UINT16 Value\r |
| 359 | )\r |
| 360 | {\r |
| 361 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 362 | ASSERT (StartBit <= EndBit);\r |
| 363 | return BitFieldAndThenOr16 (Operand, StartBit, EndBit, 0, Value);\r |
| 364 | }\r |
| 365 | \r |
| 366 | /**\r |
| 367 | Reads a bit field from a 16-bit value, performs a bitwise OR, and returns the\r |
| 368 | result.\r |
| 369 | \r |
| 370 | Performs a bitwise inclusive OR between the bit field specified by StartBit\r |
| 371 | and EndBit in Operand and the value specified by OrData. All other bits in\r |
| 372 | Operand are preserved. The new 16-bit value is returned.\r |
| 373 | \r |
| 374 | If 16-bit operations are not supported, then ASSERT().\r |
| 375 | If StartBit is greater than 15, then ASSERT().\r |
| 376 | If EndBit is greater than 15, then ASSERT().\r |
| 377 | If EndBit is less than StartBit, then ASSERT().\r |
| 378 | \r |
| 379 | @param Operand Operand on which to perform the bitfield operation.\r |
| 380 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 381 | Range 0..15.\r |
| 382 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 383 | Range 0..15.\r |
| 384 | @param OrData The value to OR with the read value from the value\r |
| 385 | \r |
| 386 | @return The new 16-bit value.\r |
| 387 | \r |
| 388 | **/\r |
| 389 | UINT16\r |
| 390 | EFIAPI\r |
| 391 | BitFieldOr16 (\r |
| 392 | IN UINT16 Operand,\r |
| 393 | IN UINTN StartBit,\r |
| 394 | IN UINTN EndBit,\r |
| 395 | IN UINT16 OrData\r |
| 396 | )\r |
| 397 | {\r |
| 398 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 399 | ASSERT (StartBit <= EndBit);\r |
| 400 | return (UINT16)BitFieldOrUint (Operand, StartBit, EndBit, OrData);\r |
| 401 | }\r |
| 402 | \r |
| 403 | /**\r |
| 404 | Reads a bit field from a 16-bit value, performs a bitwise AND, and returns\r |
| 405 | the result.\r |
| 406 | \r |
| 407 | Performs a bitwise AND between the bit field specified by StartBit and EndBit\r |
| 408 | in Operand and the value specified by AndData. All other bits in Operand are\r |
| 409 | preserved. The new 16-bit value is returned.\r |
| 410 | \r |
| 411 | If 16-bit operations are not supported, then ASSERT().\r |
| 412 | If StartBit is greater than 15, then ASSERT().\r |
| 413 | If EndBit is greater than 15, then ASSERT().\r |
| 414 | If EndBit is less than StartBit, then ASSERT().\r |
| 415 | \r |
| 416 | @param Operand Operand on which to perform the bitfield operation.\r |
| 417 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 418 | Range 0..15.\r |
| 419 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 420 | Range 0..15.\r |
| 421 | @param AndData The value to AND with the read value from the value\r |
| 422 | \r |
| 423 | @return The new 16-bit value.\r |
| 424 | \r |
| 425 | **/\r |
| 426 | UINT16\r |
| 427 | EFIAPI\r |
| 428 | BitFieldAnd16 (\r |
| 429 | IN UINT16 Operand,\r |
| 430 | IN UINTN StartBit,\r |
| 431 | IN UINTN EndBit,\r |
| 432 | IN UINT16 AndData\r |
| 433 | )\r |
| 434 | {\r |
| 435 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 436 | ASSERT (StartBit <= EndBit);\r |
| 437 | return (UINT16)BitFieldAndUint (Operand, StartBit, EndBit, AndData);\r |
| 438 | }\r |
| 439 | \r |
| 440 | /**\r |
| 441 | Reads a bit field from a 16-bit value, performs a bitwise AND followed by a\r |
| 442 | bitwise OR, and returns the result.\r |
| 443 | \r |
| 444 | Performs a bitwise AND between the bit field specified by StartBit and EndBit\r |
| 445 | in Operand and the value specified by AndData, followed by a bitwise\r |
| 446 | inclusive OR with value specified by OrData. All other bits in Operand are\r |
| 447 | preserved. The new 16-bit value is returned.\r |
| 448 | \r |
| 449 | If 16-bit operations are not supported, then ASSERT().\r |
| 450 | If StartBit is greater than 15, then ASSERT().\r |
| 451 | If EndBit is greater than 15, then ASSERT().\r |
| 452 | If EndBit is less than StartBit, then ASSERT().\r |
| 453 | \r |
| 454 | @param Operand Operand on which to perform the bitfield operation.\r |
| 455 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 456 | Range 0..15.\r |
| 457 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 458 | Range 0..15.\r |
| 459 | @param AndData The value to AND with the read value from the value.\r |
| 460 | @param OrData The value to OR with the result of the AND operation.\r |
| 461 | \r |
| 462 | @return The new 16-bit value.\r |
| 463 | \r |
| 464 | **/\r |
| 465 | UINT16\r |
| 466 | EFIAPI\r |
| 467 | BitFieldAndThenOr16 (\r |
| 468 | IN UINT16 Operand,\r |
| 469 | IN UINTN StartBit,\r |
| 470 | IN UINTN EndBit,\r |
| 471 | IN UINT16 AndData,\r |
| 472 | IN UINT16 OrData\r |
| 473 | )\r |
| 474 | {\r |
| 475 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 476 | ASSERT (StartBit <= EndBit);\r |
| 477 | return BitFieldOr16 (\r |
| 478 | BitFieldAnd16 (Operand, StartBit, EndBit, AndData),\r |
| 479 | StartBit,\r |
| 480 | EndBit,\r |
| 481 | OrData\r |
| 482 | );\r |
| 483 | }\r |
| 484 | \r |
| 485 | /**\r |
| 486 | Returns a bit field from a 32-bit value.\r |
| 487 | \r |
| 488 | Returns the bitfield specified by the StartBit and the EndBit from Operand.\r |
| 489 | \r |
| 490 | If 32-bit operations are not supported, then ASSERT().\r |
| 491 | If StartBit is greater than 31, then ASSERT().\r |
| 492 | If EndBit is greater than 31, then ASSERT().\r |
| 493 | If EndBit is less than StartBit, then ASSERT().\r |
| 494 | \r |
| 495 | @param Operand Operand on which to perform the bitfield operation.\r |
| 496 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 497 | Range 0..31.\r |
| 498 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 499 | Range 0..31.\r |
| 500 | \r |
| 501 | @return The bit field read.\r |
| 502 | \r |
| 503 | **/\r |
| 504 | UINT32\r |
| 505 | EFIAPI\r |
| 506 | BitFieldRead32 (\r |
| 507 | IN UINT32 Operand,\r |
| 508 | IN UINTN StartBit,\r |
| 509 | IN UINTN EndBit\r |
| 510 | )\r |
| 511 | {\r |
| 512 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 513 | ASSERT (StartBit <= EndBit);\r |
| 514 | return (UINT32)BitFieldReadUint (Operand, StartBit, EndBit);\r |
| 515 | }\r |
| 516 | \r |
| 517 | /**\r |
| 518 | Writes a bit field to a 32-bit value, and returns the result.\r |
| 519 | \r |
| 520 | Writes Value to the bit field specified by the StartBit and the EndBit in\r |
| 521 | Operand. All other bits in Operand are preserved. The new 32-bit value is\r |
| 522 | returned.\r |
| 523 | \r |
| 524 | If 32-bit operations are not supported, then ASSERT().\r |
| 525 | If StartBit is greater than 31, then ASSERT().\r |
| 526 | If EndBit is greater than 31, then ASSERT().\r |
| 527 | If EndBit is less than StartBit, then ASSERT().\r |
| 528 | \r |
| 529 | @param Operand Operand on which to perform the bitfield operation.\r |
| 530 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 531 | Range 0..31.\r |
| 532 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 533 | Range 0..31.\r |
| 534 | @param Value New value of the bit field.\r |
| 535 | \r |
| 536 | @return The new 32-bit value.\r |
| 537 | \r |
| 538 | **/\r |
| 539 | UINT32\r |
| 540 | EFIAPI\r |
| 541 | BitFieldWrite32 (\r |
| 542 | IN UINT32 Operand,\r |
| 543 | IN UINTN StartBit,\r |
| 544 | IN UINTN EndBit,\r |
| 545 | IN UINT32 Value\r |
| 546 | )\r |
| 547 | {\r |
| 548 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 549 | ASSERT (StartBit <= EndBit);\r |
| 550 | return BitFieldAndThenOr32 (Operand, StartBit, EndBit, 0, Value);\r |
| 551 | }\r |
| 552 | \r |
| 553 | /**\r |
| 554 | Reads a bit field from a 32-bit value, performs a bitwise OR, and returns the\r |
| 555 | result.\r |
| 556 | \r |
| 557 | Performs a bitwise inclusive OR between the bit field specified by StartBit\r |
| 558 | and EndBit in Operand and the value specified by OrData. All other bits in\r |
| 559 | Operand are preserved. The new 32-bit value is returned.\r |
| 560 | \r |
| 561 | If 32-bit operations are not supported, then ASSERT().\r |
| 562 | If StartBit is greater than 31, then ASSERT().\r |
| 563 | If EndBit is greater than 31, then ASSERT().\r |
| 564 | If EndBit is less than StartBit, then ASSERT().\r |
| 565 | \r |
| 566 | @param Operand Operand on which to perform the bitfield operation.\r |
| 567 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 568 | Range 0..31.\r |
| 569 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 570 | Range 0..31.\r |
| 571 | @param OrData The value to OR with the read value from the value\r |
| 572 | \r |
| 573 | @return The new 32-bit value.\r |
| 574 | \r |
| 575 | **/\r |
| 576 | UINT32\r |
| 577 | EFIAPI\r |
| 578 | BitFieldOr32 (\r |
| 579 | IN UINT32 Operand,\r |
| 580 | IN UINTN StartBit,\r |
| 581 | IN UINTN EndBit,\r |
| 582 | IN UINT32 OrData\r |
| 583 | )\r |
| 584 | {\r |
| 585 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 586 | ASSERT (StartBit <= EndBit);\r |
| 587 | return (UINT32)BitFieldOrUint (Operand, StartBit, EndBit, OrData);\r |
| 588 | }\r |
| 589 | \r |
| 590 | /**\r |
| 591 | Reads a bit field from a 32-bit value, performs a bitwise AND, and returns\r |
| 592 | the result.\r |
| 593 | \r |
| 594 | Performs a bitwise AND between the bit field specified by StartBit and EndBit\r |
| 595 | in Operand and the value specified by AndData. All other bits in Operand are\r |
| 596 | preserved. The new 32-bit value is returned.\r |
| 597 | \r |
| 598 | If 32-bit operations are not supported, then ASSERT().\r |
| 599 | If StartBit is greater than 31, then ASSERT().\r |
| 600 | If EndBit is greater than 31, then ASSERT().\r |
| 601 | If EndBit is less than StartBit, then ASSERT().\r |
| 602 | \r |
| 603 | @param Operand Operand on which to perform the bitfield operation.\r |
| 604 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 605 | Range 0..31.\r |
| 606 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 607 | Range 0..31.\r |
| 608 | @param AndData The value to AND with the read value from the value\r |
| 609 | \r |
| 610 | @return The new 32-bit value.\r |
| 611 | \r |
| 612 | **/\r |
| 613 | UINT32\r |
| 614 | EFIAPI\r |
| 615 | BitFieldAnd32 (\r |
| 616 | IN UINT32 Operand,\r |
| 617 | IN UINTN StartBit,\r |
| 618 | IN UINTN EndBit,\r |
| 619 | IN UINT32 AndData\r |
| 620 | )\r |
| 621 | {\r |
| 622 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 623 | ASSERT (StartBit <= EndBit);\r |
| 624 | return (UINT32)BitFieldAndUint (Operand, StartBit, EndBit, AndData);\r |
| 625 | }\r |
| 626 | \r |
| 627 | /**\r |
| 628 | Reads a bit field from a 32-bit value, performs a bitwise AND followed by a\r |
| 629 | bitwise OR, and returns the result.\r |
| 630 | \r |
| 631 | Performs a bitwise AND between the bit field specified by StartBit and EndBit\r |
| 632 | in Operand and the value specified by AndData, followed by a bitwise\r |
| 633 | inclusive OR with value specified by OrData. All other bits in Operand are\r |
| 634 | preserved. The new 32-bit value is returned.\r |
| 635 | \r |
| 636 | If 32-bit operations are not supported, then ASSERT().\r |
| 637 | If StartBit is greater than 31, then ASSERT().\r |
| 638 | If EndBit is greater than 31, then ASSERT().\r |
| 639 | If EndBit is less than StartBit, then ASSERT().\r |
| 640 | \r |
| 641 | @param Operand Operand on which to perform the bitfield operation.\r |
| 642 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 643 | Range 0..31.\r |
| 644 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 645 | Range 0..31.\r |
| 646 | @param AndData The value to AND with the read value from the value.\r |
| 647 | @param OrData The value to OR with the result of the AND operation.\r |
| 648 | \r |
| 649 | @return The new 32-bit value.\r |
| 650 | \r |
| 651 | **/\r |
| 652 | UINT32\r |
| 653 | EFIAPI\r |
| 654 | BitFieldAndThenOr32 (\r |
| 655 | IN UINT32 Operand,\r |
| 656 | IN UINTN StartBit,\r |
| 657 | IN UINTN EndBit,\r |
| 658 | IN UINT32 AndData,\r |
| 659 | IN UINT32 OrData\r |
| 660 | )\r |
| 661 | {\r |
| 662 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 663 | ASSERT (StartBit <= EndBit);\r |
| 664 | return BitFieldOr32 (\r |
| 665 | BitFieldAnd32 (Operand, StartBit, EndBit, AndData),\r |
| 666 | StartBit,\r |
| 667 | EndBit,\r |
| 668 | OrData\r |
| 669 | );\r |
| 670 | }\r |
| 671 | \r |
| 672 | /**\r |
| 673 | Returns a bit field from a 64-bit value.\r |
| 674 | \r |
| 675 | Returns the bitfield specified by the StartBit and the EndBit from Operand.\r |
| 676 | \r |
| 677 | If 64-bit operations are not supported, then ASSERT().\r |
| 678 | If StartBit is greater than 63, then ASSERT().\r |
| 679 | If EndBit is greater than 63, then ASSERT().\r |
| 680 | If EndBit is less than StartBit, then ASSERT().\r |
| 681 | \r |
| 682 | @param Operand Operand on which to perform the bitfield operation.\r |
| 683 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 684 | Range 0..63.\r |
| 685 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 686 | Range 0..63.\r |
| 687 | \r |
| 688 | @return The bit field read.\r |
| 689 | \r |
| 690 | **/\r |
| 691 | UINT64\r |
| 692 | EFIAPI\r |
| 693 | BitFieldRead64 (\r |
| 694 | IN UINT64 Operand,\r |
| 695 | IN UINTN StartBit,\r |
| 696 | IN UINTN EndBit\r |
| 697 | )\r |
| 698 | {\r |
| 699 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 700 | ASSERT (StartBit <= EndBit);\r |
| 701 | return RShiftU64 (Operand & ~LShiftU64 ((UINT64)-2, EndBit), StartBit);\r |
| 702 | }\r |
| 703 | \r |
| 704 | /**\r |
| 705 | Writes a bit field to a 64-bit value, and returns the result.\r |
| 706 | \r |
| 707 | Writes Value to the bit field specified by the StartBit and the EndBit in\r |
| 708 | Operand. All other bits in Operand are preserved. The new 64-bit value is\r |
| 709 | returned.\r |
| 710 | \r |
| 711 | If 64-bit operations are not supported, then ASSERT().\r |
| 712 | If StartBit is greater than 63, then ASSERT().\r |
| 713 | If EndBit is greater than 63, then ASSERT().\r |
| 714 | If EndBit is less than StartBit, then ASSERT().\r |
| 715 | \r |
| 716 | @param Operand Operand on which to perform the bitfield operation.\r |
| 717 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 718 | Range 0..63.\r |
| 719 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 720 | Range 0..63.\r |
| 721 | @param Value New value of the bit field.\r |
| 722 | \r |
| 723 | @return The new 64-bit value.\r |
| 724 | \r |
| 725 | **/\r |
| 726 | UINT64\r |
| 727 | EFIAPI\r |
| 728 | BitFieldWrite64 (\r |
| 729 | IN UINT64 Operand,\r |
| 730 | IN UINTN StartBit,\r |
| 731 | IN UINTN EndBit,\r |
| 732 | IN UINT64 Value\r |
| 733 | )\r |
| 734 | {\r |
| 735 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 736 | ASSERT (StartBit <= EndBit);\r |
| 737 | return BitFieldAndThenOr64 (Operand, StartBit, EndBit, 0, Value);\r |
| 738 | }\r |
| 739 | \r |
| 740 | /**\r |
| 741 | Reads a bit field from a 64-bit value, performs a bitwise OR, and returns the\r |
| 742 | result.\r |
| 743 | \r |
| 744 | Performs a bitwise inclusive OR between the bit field specified by StartBit\r |
| 745 | and EndBit in Operand and the value specified by OrData. All other bits in\r |
| 746 | Operand are preserved. The new 64-bit value is returned.\r |
| 747 | \r |
| 748 | If 64-bit operations are not supported, then ASSERT().\r |
| 749 | If StartBit is greater than 63, then ASSERT().\r |
| 750 | If EndBit is greater than 63, then ASSERT().\r |
| 751 | If EndBit is less than StartBit, then ASSERT().\r |
| 752 | \r |
| 753 | @param Operand Operand on which to perform the bitfield operation.\r |
| 754 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 755 | Range 0..63.\r |
| 756 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 757 | Range 0..63.\r |
| 758 | @param OrData The value to OR with the read value from the value\r |
| 759 | \r |
| 760 | @return The new 64-bit value.\r |
| 761 | \r |
| 762 | **/\r |
| 763 | UINT64\r |
| 764 | EFIAPI\r |
| 765 | BitFieldOr64 (\r |
| 766 | IN UINT64 Operand,\r |
| 767 | IN UINTN StartBit,\r |
| 768 | IN UINTN EndBit,\r |
| 769 | IN UINT64 OrData\r |
| 770 | )\r |
| 771 | {\r |
| 772 | UINT64 Value1;\r |
| 773 | UINT64 Value2;\r |
| 774 | \r |
| 775 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 776 | ASSERT (StartBit <= EndBit);\r |
| 777 | \r |
| 778 | Value1 = LShiftU64 (OrData, StartBit);\r |
| 779 | Value2 = LShiftU64 ((UINT64) - 2, EndBit);\r |
| 780 | \r |
| 781 | return Operand | (Value1 & ~Value2);\r |
| 782 | }\r |
| 783 | \r |
| 784 | /**\r |
| 785 | Reads a bit field from a 64-bit value, performs a bitwise AND, and returns\r |
| 786 | the result.\r |
| 787 | \r |
| 788 | Performs a bitwise AND between the bit field specified by StartBit and EndBit\r |
| 789 | in Operand and the value specified by AndData. All other bits in Operand are\r |
| 790 | preserved. The new 64-bit value is returned.\r |
| 791 | \r |
| 792 | If 64-bit operations are not supported, then ASSERT().\r |
| 793 | If StartBit is greater than 63, then ASSERT().\r |
| 794 | If EndBit is greater than 63, then ASSERT().\r |
| 795 | If EndBit is less than StartBit, then ASSERT().\r |
| 796 | \r |
| 797 | @param Operand Operand on which to perform the bitfield operation.\r |
| 798 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 799 | Range 0..63.\r |
| 800 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 801 | Range 0..63.\r |
| 802 | @param AndData The value to AND with the read value from the value\r |
| 803 | \r |
| 804 | @return The new 64-bit value.\r |
| 805 | \r |
| 806 | **/\r |
| 807 | UINT64\r |
| 808 | EFIAPI\r |
| 809 | BitFieldAnd64 (\r |
| 810 | IN UINT64 Operand,\r |
| 811 | IN UINTN StartBit,\r |
| 812 | IN UINTN EndBit,\r |
| 813 | IN UINT64 AndData\r |
| 814 | )\r |
| 815 | {\r |
| 816 | UINT64 Value1;\r |
| 817 | UINT64 Value2;\r |
| 818 | \r |
| 819 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 820 | ASSERT (StartBit <= EndBit);\r |
| 821 | \r |
| 822 | Value1 = LShiftU64 (~AndData, StartBit);\r |
| 823 | Value2 = LShiftU64 ((UINT64)-2, EndBit);\r |
| 824 | \r |
| 825 | return Operand & ~(Value1 & ~Value2);\r |
| 826 | }\r |
| 827 | \r |
| 828 | /**\r |
| 829 | Reads a bit field from a 64-bit value, performs a bitwise AND followed by a\r |
| 830 | bitwise OR, and returns the result.\r |
| 831 | \r |
| 832 | Performs a bitwise AND between the bit field specified by StartBit and EndBit\r |
| 833 | in Operand and the value specified by AndData, followed by a bitwise\r |
| 834 | inclusive OR with value specified by OrData. All other bits in Operand are\r |
| 835 | preserved. The new 64-bit value is returned.\r |
| 836 | \r |
| 837 | If 64-bit operations are not supported, then ASSERT().\r |
| 838 | If StartBit is greater than 63, then ASSERT().\r |
| 839 | If EndBit is greater than 63, then ASSERT().\r |
| 840 | If EndBit is less than StartBit, then ASSERT().\r |
| 841 | \r |
| 842 | @param Operand Operand on which to perform the bitfield operation.\r |
| 843 | @param StartBit The ordinal of the least significant bit in the bit field.\r |
| 844 | Range 0..63.\r |
| 845 | @param EndBit The ordinal of the most significant bit in the bit field.\r |
| 846 | Range 0..63.\r |
| 847 | @param AndData The value to AND with the read value from the value.\r |
| 848 | @param OrData The value to OR with the result of the AND operation.\r |
| 849 | \r |
| 850 | @return The new 64-bit value.\r |
| 851 | \r |
| 852 | **/\r |
| 853 | UINT64\r |
| 854 | EFIAPI\r |
| 855 | BitFieldAndThenOr64 (\r |
| 856 | IN UINT64 Operand,\r |
| 857 | IN UINTN StartBit,\r |
| 858 | IN UINTN EndBit,\r |
| 859 | IN UINT64 AndData,\r |
| 860 | IN UINT64 OrData\r |
| 861 | )\r |
| 862 | {\r |
| 863 | ASSERT (EndBit < sizeof (Operand) * 8);\r |
| 864 | ASSERT (StartBit <= EndBit);\r |
| 865 | return BitFieldOr64 (\r |
| 866 | BitFieldAnd64 (Operand, StartBit, EndBit, AndData),\r |
| 867 | StartBit,\r |
| 868 | EndBit,\r |
| 869 | OrData\r |
| 870 | );\r |
| 871 | }\r |
projects / mirror_edk2.git / blame