RealView Compilation Tools - ARM Information Center

More documents

Recommendations

Info

Compiler-specific Features • __packed structures versus individually __packed fields on page 5-28 in the Compiler User Guide. 4.5.7 __attribute__((section("name"))) Normally, the ARM compiler places the objects it generates in sections like data and bss. However, you might require additional data sections or you might want a variable to appear in a special section, for example, to map to special hardware. The section attribute specifies that a variable must be placed in a particular data section. If you use the section attribute, read-only variables are placed in RO data sections, read-write variables are placed in RW data sections unless you use the zero_init attribute. In this case, the variable is placed in a ZI section. Note This variable attribute is a GNU compiler extension supported by the ARM compiler. Example /* in RO section */ const int descriptor[3] __attribute__ ((section ("descr"))) = { 1,2,3 }; /* in RW section */ long long rw[10] __attribute__ ((section ("RW"))); /* in ZI section * long long altstack[10] __attribute__ ((section ("STACK"), zero_init));/ 4.5.8 __attribute__((transparent_union)) The transparent_union variable attribute, attached to a function parameter that is a union, means that the corresponding argument can have the type of any union member, but the argument is passed as if its type were that of the first union member. Note The C specification states that the value returned when a union is written as one type and read back with another is undefined. Therefore, a method of distinguishing which type a transparent_union is written in must also be passed as an argument. Note This variable attribute is a GNU compiler extension that is supported by the ARM compiler. 4-52 Copyright © 2007-2010 ARM. All rights reserved. ARM DUI 0348C Non-Confidential, ID101213
Compiler-specific Features Note You can also use this attribute on a typedef for a union data type. In this case it applies to all function parameters with that type. Mode Supported in GNU mode only. Example typedef union { int myint; float myfloat; } transparent_union_t; void Variable_Attributes_transparent_union_0(transparent_union_t aUnion __attribute__ ((transparent_union))) { static int aStatic; aStatic +=aUnion.myint; } void Variable_Attributes_transparent_union_1() { int aLocal =0; float bLocal =0; Variable_Attributes_transparent_union_0(aLocal); Variable_Attributes_transparent_union_0(bLocal); } See also • __attribute__((transparent_union)) on page 4-46. 4.5.9 __attribute__((unused)) Normally, the compiler warns if a variable is declared but is never referenced. This attribute informs the compiler that you expect a variable to be unused and tells it not issue a warning if it is not used. Note This variable attribute is a GNU compiler extension that is supported by the ARM compiler. ARM DUI 0348C Copyright © 2007-2010 ARM. All rights reserved. 4-53 ID101213 Non-Confidential,
Page 1 and 2:
® RealView Compilation Tools Versi
Page 3 and 4:
Product Status The information in t
Page 5 and 6:
Contents RealView Compilation Tools
Page 7 and 8:
Preface This preface introduces the
Page 9 and 10:
Preface Appendix A Via File Syntax
Page 11 and 12:
Preface Other publications The foll
Page 13 and 14:
Chapter 1 Introduction This chapter
Page 15 and 16:
Introduction 1.2 Source language mo
Page 17 and 18:
Introduction 1.3 Language extension
Page 19 and 20:
Introduction • Compiling a C sour
Page 21 and 22:
Chapter 2 Compiler Command-line Opt
Page 23 and 24:
Compiler Command-line Options 2.1.2
Page 25 and 26:
Compiler Command-line Options Each
Page 27 and 28:
Compiler Command-line Options Note
Page 29 and 30:
Compiler Command-line Options • -
Page 31 and 32:
Compiler Command-line Options Restr
Page 33 and 34:
Compiler Command-line Options Defau
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Compiler Command-line Options Examp
Page 41 and 42:
Compiler Command-line Options • a
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Compiler Command-line Options Synta
Page 53 and 54:
Compiler Command-line Options • I
Page 55 and 56:
Compiler Command-line Options See a
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Compiler Command-line Options Compi
Page 65 and 66:
Page 67 and 68:
Compiler Command-line Options Selec
Page 69 and 70:
Page 71 and 72:
Compiler Command-line Options • R
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Compiler Command-line Options Usage
Page 79 and 80:
Page 81 and 82:
Compiler Command-line Options A num
Page 83 and 84:
Compiler Command-line Options vfpv3
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Compiler Command-line Options The c
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Compiler Command-line Options The c
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Compiler Command-line Options #incl
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Compiler Command-line Options Error
Page 143 and 144:
Compiler Command-line Options • a
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Compiler Command-line Options The i
Page 151 and 152:
Page 153 and 154:
Compiler Command-line Options and a
Page 155 and 156:
Page 157 and 158:
Compiler Command-line Options Error
Page 159 and 160:
Chapter 3 Language Extensions This
Page 161 and 162:
Language Extensions 3.1.2 #include_
Page 163 and 164:
Language Extensions 3.2 C99 languag
Page 165 and 166:
Language Extensions 3.3 C99 languag
Page 167 and 168:
Language Extensions Restrictions Th
Page 169 and 170:
Language Extensions static int y =
Page 171 and 172:
Language Extensions 3.4.4 Dollar si
Page 173 and 174:
Language Extensions 3.5 Standard C+
Page 175 and 176:
Language Extensions Example 3-2 Lin
Page 177 and 178:
Language Extensions 3.6 Standard C
Page 179 and 180:
Language Extensions int counter __a
Page 181 and 182:
Language Extensions 3.6.12 Structur
Page 183 and 184:
Language Extensions 3.7 GNU languag
Page 185 and 186:
Language Extensions 3.7.5 Character
Page 187 and 188:
Language Extensions • You can use
Page 189 and 190:
Language Extensions Errors The comp
Page 191 and 192: Chapter 4 Compiler-specific Feature
Page 193 and 194: Compiler-specific Features Usage __
Page 195 and 196: Compiler-specific Features Return v
Page 197 and 198: Compiler-specific Features Example
Page 201 and 202: Compiler-specific Features The func
Page 205 and 206: Compiler-specific Features Note The
Page 207 and 208: Compiler-specific Features Usage Th
Page 209 and 210: Compiler-specific Features Syntax _
Page 211 and 212: Compiler-specific Features See also
Page 213 and 214: Compiler-specific Features __weak v
Page 215 and 216: Compiler-specific Features When a c
Page 217 and 218: Compiler-specific Features Examples
Page 219 and 220: Compiler-specific Features Usage If
Page 221 and 222: Compiler-specific Features 4.3 Func
Page 223 and 224: Compiler-specific Features 4.3.2 __
Page 225 and 226: Compiler-specific Features Note Thi
Page 227 and 228: Compiler-specific Features 4.3.11 _
Page 233 and 234: Compiler-specific Features 4.4 Type
Page 235 and 236: Compiler-specific Features • Bit-
Page 237 and 238: Compiler-specific Features 4.5 Vari
Page 239 and 240: Compiler-specific Features In parti
Page 241: Compiler-specific Features 4.5.5 __
Page 249 and 250: Compiler-specific Features Default
Page 251 and 252: Compiler-specific Features • Chap
Page 253 and 254: Compiler-specific Features Where: t
Page 255 and 256: Compiler-specific Features This pra
Page 257 and 258: Compiler-specific Features • __at
Page 263 and 264: Compiler-specific Features Note Bot
Page 265 and 266: Compiler-specific Features 4.7 Inst
Page 267 and 268: Compiler-specific Features opcode2
Page 273 and 274: Compiler-specific Features Syntax v
Page 275 and 276: Compiler-specific Features Where: p
Page 277 and 278: Compiler-specific Features Errors T
Page 279 and 280: Compiler-specific Features Syntax v
Page 281 and 282: Compiler-specific Features Restrict
Page 289 and 290: Compiler-specific Features Errors T
Page 293 and 294:
Compiler-specific Features ptr poin
Page 295 and 296:
Compiler-specific Features 4.7.39 _
Page 297 and 298:
Page 299 and 300:
Compiler-specific Features 4.7.44 A
Page 301 and 302:
Compiler-specific Features Table 4-
Page 303 and 304:
Page 305 and 306:
Page 307 and 308:
Compiler-specific Features 4.7.47 A
Page 309 and 310:
Page 311 and 312:
Compiler-specific Features • __uh
Page 313 and 314:
Page 315 and 316:
Compiler-specific Features • Para
Page 317 and 318:
Compiler-specific Features • Para
Page 319 and 320:
Page 321 and 322:
Page 323 and 324:
Page 325 and 326:
Compiler-specific Features See also
Page 327 and 328:
Page 329 and 330:
Page 331 and 332:
Page 333 and 334:
Page 335 and 336:
Page 337 and 338:
Page 339 and 340:
Page 341 and 342:
Page 343 and 344:
Page 345 and 346:
Page 347 and 348:
Page 349 and 350:
Page 351 and 352:
Page 353 and 354:
Page 355 and 356:
Page 357 and 358:
Page 359 and 360:
Page 361 and 362:
Page 363 and 364:
Page 365 and 366:
Page 367 and 368:
Page 369 and 370:
Compiler-specific Features 4.7.100
Page 371 and 372:
Page 373 and 374:
Page 375 and 376:
Page 377 and 378:
Page 379 and 380:
Compiler-specific Features } int32_
Page 381 and 382:
Compiler-specific Features 4.8 VFP
Page 383 and 384:
Page 385 and 386:
Compiler-specific Features 4.10 GNU
Page 387 and 388:
Compiler-specific Features __builti
Page 389 and 390:
Page 391 and 392:
Page 393 and 394:
Page 395 and 396:
Chapter 5 C and C++ Implementation
Page 397 and 398:
C and C++ Implementation Details th
Page 399 and 400:
C and C++ Implementation Details Se
Page 401 and 402:
C and C++ Implementation Details Po
Page 403 and 404:
C and C++ Implementation Details
Page 405 and 406:
C and C++ Implementation Details st
Page 407 and 408:
C and C++ Implementation Details 5.
Page 409 and 410:
C and C++ Implementation Details No
Page 411 and 412:
C and C++ Implementation Details na
Page 413 and 414:
C and C++ Implementation Details 5.
Page 415 and 416:
Appendix A Via File Syntax This app
Page 417 and 418:
Via File Syntax A.2 Syntax Via file
Page 419 and 420:
Appendix B Standard C Implementatio
Page 421 and 422:
Standard C Implementation Definitio
Page 423 and 424:
Page 425 and 426:
Page 427 and 428:
Page 429 and 430:
Appendix C Standard C++ Implementat
Page 431 and 432:
Standard C++ Implementation Definit
Page 433 and 434:
Standard C++ Implementation Definit
Page 435 and 436:
Appendix D C and C++ Compiler Imple
Page 437 and 438:
C and C++ Compiler Implementation L
Page 439 and 440:
C and C++ Compiler Implementation L
Page 441 and 442:
Appendix E Using NEON Support This
Page 443 and 444:
Using NEON Support E.2 Vector data
Page 445 and 446:
Using NEON Support • Vector long
Page 447 and 448:
Using NEON Support uint64x1_t vqadd
Page 449 and 450:
Using NEON Support Vector multiply
Page 451 and 452:
Using NEON Support int64x1_t vqsub_
Page 453 and 454:
Using NEON Support uint32x2_t vcle_
Page 455 and 456:
Using NEON Support uint16x4_t vabd_
Page 457 and 458:
Using NEON Support Long pairwise ad
Page 459 and 460:
Using NEON Support int16x8_t vqshlq
Page 461 and 462:
Using NEON Support uint8x8_t vrshr_
Page 463 and 464:
Using NEON Support Vector signed->u
Page 465 and 466:
Using NEON Support uint8x16_t vld1q
Page 467 and 468:
Using NEON Support int16x4_t lane);
Page 469 and 470:
Using NEON Support // VST1.8 {d0},
Page 471 and 472:
Using NEON Support uint64x1x2_t vld
Page 473 and 474:
Using NEON Support float32x2x4_t vl
Page 475 and 476:
Using NEON Support lane); // VLD2.8
Page 477 and 478:
Using NEON Support // VLD4.16 {d0[0
Page 479 and 480:
Using NEON Support // VST3.32 {d0,
Page 481 and 482:
Using NEON Support // VST3.32 {d0[0
Page 483 and 484:
Using NEON Support uint8x8_t vset_l
Page 485 and 486:
Using NEON Support float32x2_t vmov
Page 487 and 488:
Using NEON Support uint32x2_t vcvt_
Page 489 and 490:
Using NEON Support // VMLA.I16 d0,
Page 491 and 492:
Using NEON Support Vector long mult
Page 493 and 494:
Using NEON Support Vector widening
Page 495 and 496:
Using NEON Support int8x16_t vqabsq
Page 497 and 498:
Using NEON Support Bitwise and int8
Page 499 and 500:
Using NEON Support Bitwise Select N
Page 501 and 502:
Using NEON Support E.3.31 Vector re
show all

RealView Compilation Tools - ARM Information Center

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?