7zip/C/7zCrc.c at 25.01 · AIahmedshrf/7zip

Repository navigation

History

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

/* 7zCrc.c -- CRC32 calculation and init

2024-03-01 : Igor Pavlov : Public domain */

#include "Precomp.h"

#include "7zCrc.h"

#include "CpuArch.h"

// for debug:

// #define __ARM_FEATURE_CRC32 1

#ifdef __ARM_FEATURE_CRC32

// #pragma message("__ARM_FEATURE_CRC32")

#define Z7_CRC_HW_FORCE

#endif

// #define Z7_CRC_DEBUG_BE

#ifdef Z7_CRC_DEBUG_BE

#undef MY_CPU_LE

#define MY_CPU_BE

#endif

#ifdef Z7_CRC_HW_FORCE

#define Z7_CRC_NUM_TABLES_USE 1

#else

#ifdef Z7_CRC_NUM_TABLES

#define Z7_CRC_NUM_TABLES_USE Z7_CRC_NUM_TABLES

#else

#define Z7_CRC_NUM_TABLES_USE 12

#endif

#if Z7_CRC_NUM_TABLES_USE < 1

#error Stop_Compiling_Bad_Z7_CRC_NUM_TABLES

#endif

#if defined(MY_CPU_LE) || (Z7_CRC_NUM_TABLES_USE == 1)

#define Z7_CRC_NUM_TABLES_TOTAL Z7_CRC_NUM_TABLES_USE

#else

#define Z7_CRC_NUM_TABLES_TOTAL (Z7_CRC_NUM_TABLES_USE + 1)

#endif

#ifndef Z7_CRC_HW_FORCE

#if Z7_CRC_NUM_TABLES_USE == 1 \

|| (!defined(MY_CPU_LE) && !defined(MY_CPU_BE))

#define CRC_UPDATE_BYTE_2(crc, b) (table[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8))

#define Z7_CRC_UPDATE_T1_FUNC_NAME CrcUpdateGT1

static UInt32 Z7_FASTCALL Z7_CRC_UPDATE_T1_FUNC_NAME(UInt32 v, const void *data, size_t size)

{

const UInt32 *table = g_CrcTable;

const Byte *p = (const Byte *)data;

const Byte *lim = p + size;

for (; p != lim; p++)

v = CRC_UPDATE_BYTE_2(v, *p);

return v;

}

#endif

#if Z7_CRC_NUM_TABLES_USE != 1

#ifndef MY_CPU_BE

#define FUNC_NAME_LE_2(s) CrcUpdateT ## s

#define FUNC_NAME_LE_1(s) FUNC_NAME_LE_2(s)

#define FUNC_NAME_LE FUNC_NAME_LE_1(Z7_CRC_NUM_TABLES_USE)

UInt32 Z7_FASTCALL FUNC_NAME_LE (UInt32 v, const void *data, size_t size, const UInt32 *table);

#endif

#ifndef MY_CPU_LE

#define FUNC_NAME_BE_2(s) CrcUpdateT1_BeT ## s

#define FUNC_NAME_BE_1(s) FUNC_NAME_BE_2(s)

#define FUNC_NAME_BE FUNC_NAME_BE_1(Z7_CRC_NUM_TABLES_USE)

UInt32 Z7_FASTCALL FUNC_NAME_BE (UInt32 v, const void *data, size_t size, const UInt32 *table);

#endif

#endif // Z7_CRC_HW_FORCE

/* ---------- hardware CRC ---------- */

#ifdef MY_CPU_LE

#if defined(MY_CPU_ARM_OR_ARM64)

// #pragma message("ARM*")

#if (defined(__clang__) && (__clang_major__ >= 3)) \

|| defined(__GNUC__) && (__GNUC__ >= 6) && defined(MY_CPU_ARM64) \

|| defined(__GNUC__) && (__GNUC__ >= 8)

#if !defined(__ARM_FEATURE_CRC32)

// #pragma message("!defined(__ARM_FEATURE_CRC32)")

Z7_DIAGNOSTIC_IGNORE_BEGIN_RESERVED_MACRO_IDENTIFIER

#define __ARM_FEATURE_CRC32 1

Z7_DIAGNOSTIC_IGNORE_END_RESERVED_MACRO_IDENTIFIER

#define Z7_ARM_FEATURE_CRC32_WAS_SET

#if defined(__clang__)

#if defined(MY_CPU_ARM64)

#define ATTRIB_CRC __attribute__((__target__("crc")))

#else

#define ATTRIB_CRC __attribute__((__target__("armv8-a,crc")))

#endif

#else

#if defined(MY_CPU_ARM64)

#if !defined(Z7_GCC_VERSION) || (Z7_GCC_VERSION >= 60000)

#define ATTRIB_CRC __attribute__((__target__("+crc")))

#endif

#else

#if !defined(Z7_GCC_VERSION) || (__GNUC__ >= 8)

#if defined(__ARM_FP) && __GNUC__ >= 8

// for -mfloat-abi=hard: similar to <arm_acle.h>

#define ATTRIB_CRC __attribute__((__target__("arch=armv8-a+crc+simd")))

#else

#define ATTRIB_CRC __attribute__((__target__("arch=armv8-a+crc")))

#endif

#if defined(__ARM_FEATURE_CRC32)

// #pragma message("<arm_acle.h>")

arm_acle.h (GGC):

before Nov 17, 2017:

#ifdef __ARM_FEATURE_CRC32

Nov 17, 2017: gcc10.0 (gcc 9.2.0) checked"

#if __ARM_ARCH >= 8

#pragma GCC target ("arch=armv8-a+crc")

Aug 22, 2019: GCC 8.4?, 9.2.1, 10.1:

#ifdef __ARM_FEATURE_CRC32

#ifdef __ARM_FP

#pragma GCC target ("arch=armv8-a+crc+simd")

#else

#pragma GCC target ("arch=armv8-a+crc")

#endif

#if defined(__ARM_ARCH) && __ARM_ARCH < 8

#if defined(Z7_GCC_VERSION) && (__GNUC__ == 8) && (Z7_GCC_VERSION < 80400) \

|| defined(Z7_GCC_VERSION) && (__GNUC__ == 9) && (Z7_GCC_VERSION < 90201) \

|| defined(Z7_GCC_VERSION) && (__GNUC__ == 10) && (Z7_GCC_VERSION < 100100)

Z7_DIAGNOSTIC_IGNORE_BEGIN_RESERVED_MACRO_IDENTIFIER

// #pragma message("#define __ARM_ARCH 8")

#undef __ARM_ARCH

#define __ARM_ARCH 8

Z7_DIAGNOSTIC_IGNORE_END_RESERVED_MACRO_IDENTIFIER

#endif

#define Z7_CRC_HW_USE

#include <arm_acle.h>

#endif

#elif defined(_MSC_VER)

#if defined(MY_CPU_ARM64)

#if (_MSC_VER >= 1910)

#ifdef __clang__

// #define Z7_CRC_HW_USE

// #include <arm_acle.h>

#else

#define Z7_CRC_HW_USE

#include <intrin.h>

#endif

#else // non-ARM*

// #define Z7_CRC_HW_USE // for debug : we can test HW-branch of code

#ifdef Z7_CRC_HW_USE

#include "7zCrcEmu.h"

#endif

#endif // non-ARM*

#if defined(Z7_CRC_HW_USE)

// #pragma message("USE ARM HW CRC")

#ifdef MY_CPU_64BIT

#define CRC_HW_WORD_TYPE UInt64

#define CRC_HW_WORD_FUNC __crc32d

#else

#define CRC_HW_WORD_TYPE UInt32

#define CRC_HW_WORD_FUNC __crc32w

#endif

#define CRC_HW_UNROLL_BYTES (sizeof(CRC_HW_WORD_TYPE) * 4)

#ifdef ATTRIB_CRC

ATTRIB_CRC

#endif

Z7_NO_INLINE

#ifdef Z7_CRC_HW_FORCE

UInt32 Z7_FASTCALL CrcUpdate

#else

static UInt32 Z7_FASTCALL CrcUpdate_HW

#endif

(UInt32 v, const void *data, size_t size)

{

const Byte *p = (const Byte *)data;

for (; size != 0 && ((unsigned)(ptrdiff_t)p & (CRC_HW_UNROLL_BYTES - 1)) != 0; size--)

v = __crc32b(v, *p++);

if (size >= CRC_HW_UNROLL_BYTES)

{

const Byte *lim = p + size;

size &= CRC_HW_UNROLL_BYTES - 1;

lim -= size;

{

v = CRC_HW_WORD_FUNC(v, *(const CRC_HW_WORD_TYPE *)(const void *)(p));

v = CRC_HW_WORD_FUNC(v, *(const CRC_HW_WORD_TYPE *)(const void *)(p + sizeof(CRC_HW_WORD_TYPE)));

p += 2 * sizeof(CRC_HW_WORD_TYPE);

v = CRC_HW_WORD_FUNC(v, *(const CRC_HW_WORD_TYPE *)(const void *)(p));

v = CRC_HW_WORD_FUNC(v, *(const CRC_HW_WORD_TYPE *)(const void *)(p + sizeof(CRC_HW_WORD_TYPE)));

p += 2 * sizeof(CRC_HW_WORD_TYPE);

}

while (p != lim);

}

for (; size != 0; size--)

v = __crc32b(v, *p++);

return v;

}

#ifdef Z7_ARM_FEATURE_CRC32_WAS_SET

Z7_DIAGNOSTIC_IGNORE_BEGIN_RESERVED_MACRO_IDENTIFIER

#undef __ARM_FEATURE_CRC32

Z7_DIAGNOSTIC_IGNORE_END_RESERVED_MACRO_IDENTIFIER

#undef Z7_ARM_FEATURE_CRC32_WAS_SET

#endif

#endif // defined(Z7_CRC_HW_USE)

#endif // MY_CPU_LE

#ifndef Z7_CRC_HW_FORCE

#if defined(Z7_CRC_HW_USE) || defined(Z7_CRC_UPDATE_T1_FUNC_NAME)

typedef UInt32 (Z7_FASTCALL *Z7_CRC_UPDATE_WITH_TABLE_FUNC)

(UInt32 v, const void *data, size_t size, const UInt32 *table);

Z7_CRC_UPDATE_WITH_TABLE_FUNC g_CrcUpdate;

static unsigned g_Crc_Algo;

#if (!defined(MY_CPU_LE) && !defined(MY_CPU_BE))

static unsigned g_Crc_Be;

#endif

#endif // defined(Z7_CRC_HW_USE) || defined(Z7_CRC_UPDATE_T1_FUNC_NAME)

Z7_NO_INLINE

#ifdef Z7_CRC_HW_USE

static UInt32 Z7_FASTCALL CrcUpdate_Base

#else

UInt32 Z7_FASTCALL CrcUpdate

#endif

(UInt32 crc, const void *data, size_t size)

{

#if Z7_CRC_NUM_TABLES_USE == 1

return Z7_CRC_UPDATE_T1_FUNC_NAME(crc, data, size);

#else // Z7_CRC_NUM_TABLES_USE != 1

#ifdef Z7_CRC_UPDATE_T1_FUNC_NAME

if (g_Crc_Algo == 1)

return Z7_CRC_UPDATE_T1_FUNC_NAME(crc, data, size);

#endif

#ifdef MY_CPU_LE

return FUNC_NAME_LE(crc, data, size, g_CrcTable);

#elif defined(MY_CPU_BE)

return FUNC_NAME_BE(crc, data, size, g_CrcTable);

#else

if (g_Crc_Be)

return FUNC_NAME_BE(crc, data, size, g_CrcTable);

else

return FUNC_NAME_LE(crc, data, size, g_CrcTable);

#endif

#endif // Z7_CRC_NUM_TABLES_USE != 1

}

#ifdef Z7_CRC_HW_USE

Z7_NO_INLINE

UInt32 Z7_FASTCALL CrcUpdate(UInt32 crc, const void *data, size_t size)

{

if (g_Crc_Algo == 0)

return CrcUpdate_HW(crc, data, size);

return CrcUpdate_Base(crc, data, size);

}

#endif

#endif // !defined(Z7_CRC_HW_FORCE)

UInt32 Z7_FASTCALL CrcCalc(const void *data, size_t size)

{

return CrcUpdate(CRC_INIT_VAL, data, size) ^ CRC_INIT_VAL;

}

MY_ALIGN(64)

UInt32 g_CrcTable[256 * Z7_CRC_NUM_TABLES_TOTAL];

void Z7_FASTCALL CrcGenerateTable(void)

{

UInt32 i;

for (i = 0; i < 256; i++)

{

#if defined(Z7_CRC_HW_FORCE)

g_CrcTable[i] = __crc32b(i, 0);

#else

#define kCrcPoly 0xEDB88320

UInt32 r = i;

unsigned j;

for (j = 0; j < 8; j++)

r = (r >> 1) ^ (kCrcPoly & ((UInt32)0 - (r & 1)));

g_CrcTable[i] = r;

#endif

}

for (i = 256; i < 256 * Z7_CRC_NUM_TABLES_USE; i++)

{

const UInt32 r = g_CrcTable[(size_t)i - 256];

g_CrcTable[i] = g_CrcTable[r & 0xFF] ^ (r >> 8);

}

#if !defined(Z7_CRC_HW_FORCE) && \

(defined(Z7_CRC_HW_USE) || defined(Z7_CRC_UPDATE_T1_FUNC_NAME) || defined(MY_CPU_BE))

#if Z7_CRC_NUM_TABLES_USE <= 1

g_Crc_Algo = 1;

#else // Z7_CRC_NUM_TABLES_USE <= 1

#if defined(MY_CPU_LE)

g_Crc_Algo = Z7_CRC_NUM_TABLES_USE;

#else // !defined(MY_CPU_LE)

{

#ifndef MY_CPU_BE

UInt32 k = 0x01020304;

const Byte *p = (const Byte *)&k;

if (p[0] == 4 && p[1] == 3)

g_Crc_Algo = Z7_CRC_NUM_TABLES_USE;

else if (p[0] != 1 || p[1] != 2)

g_Crc_Algo = 1;

else

#endif // MY_CPU_BE

{

for (i = 256 * Z7_CRC_NUM_TABLES_TOTAL - 1; i >= 256; i--)

{

const UInt32 x = g_CrcTable[(size_t)i - 256];

g_CrcTable[i] = Z7_BSWAP32(x);

}

#if defined(Z7_CRC_UPDATE_T1_FUNC_NAME)

g_Crc_Algo = Z7_CRC_NUM_TABLES_USE;

#endif

#if (!defined(MY_CPU_LE) && !defined(MY_CPU_BE))

g_Crc_Be = 1;

#endif

}

#endif // !defined(MY_CPU_LE)

#ifdef MY_CPU_LE

#ifdef Z7_CRC_HW_USE

if (CPU_IsSupported_CRC32())

g_Crc_Algo = 0;

#endif // Z7_CRC_HW_USE

#endif // MY_CPU_LE

#endif // Z7_CRC_NUM_TABLES_USE <= 1

#endif // g_Crc_Algo was declared

}

Z7_CRC_UPDATE_FUNC z7_GetFunc_CrcUpdate(unsigned algo)

{

if (algo == 0)

return &CrcUpdate;

#if defined(Z7_CRC_HW_USE)

if (algo == sizeof(CRC_HW_WORD_TYPE) * 8)

{

#ifdef Z7_CRC_HW_FORCE

return &CrcUpdate;

#else

if (g_Crc_Algo == 0)

return &CrcUpdate_HW;

#endif

}

#endif

#ifndef Z7_CRC_HW_FORCE

if (algo == Z7_CRC_NUM_TABLES_USE)

return

#ifdef Z7_CRC_HW_USE

&CrcUpdate_Base;

#else

&CrcUpdate;

#endif

return NULL;

}

#undef kCrcPoly

#undef Z7_CRC_NUM_TABLES_USE

#undef Z7_CRC_NUM_TABLES_TOTAL

#undef CRC_UPDATE_BYTE_2

#undef FUNC_NAME_LE_2

#undef FUNC_NAME_LE_1

#undef FUNC_NAME_LE

#undef FUNC_NAME_BE_2

#undef FUNC_NAME_BE_1

#undef FUNC_NAME_BE

#undef CRC_HW_UNROLL_BYTES

#undef CRC_HW_WORD_FUNC

#undef CRC_HW_WORD_TYPE

FilesExpand file tree

7zCrc.c

Latest commit

History

7zCrc.c

File metadata and controls