Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
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
421
422
423
424
425
426
427
/*===---- bmiintrin.h - BMI intrinsics -------------------------------------===
 *
 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 * See https://llvm.org/LICENSE.txt for license information.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 *
 *===-----------------------------------------------------------------------===
 */

#if !defined __X86INTRIN_H && !defined __IMMINTRIN_H
#error "Never use <bmiintrin.h> directly; include <x86intrin.h> instead."
#endif

#ifndef __BMIINTRIN_H
#define __BMIINTRIN_H

/* Allow using the tzcnt intrinsics even for non-BMI targets. Since the TZCNT
   instruction behaves as BSF on non-BMI targets, there is code that expects
   to use it as a potentially faster version of BSF. */
#define __RELAXED_FN_ATTRS __attribute__((__always_inline__, __nodebug__))

#define _tzcnt_u16(a)     (__tzcnt_u16((a)))

/// Counts the number of trailing zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> TZCNT </c> instruction.
///
/// \param __X
///    An unsigned 16-bit integer whose trailing zeros are to be counted.
/// \returns An unsigned 16-bit integer containing the number of trailing zero
///    bits in the operand.
static __inline__ unsigned short __RELAXED_FN_ATTRS
__tzcnt_u16(unsigned short __X)
{
  return __builtin_ia32_tzcnt_u16(__X);
}

/// Counts the number of trailing zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> TZCNT </c> instruction.
///
/// \param __X
///    An unsigned 32-bit integer whose trailing zeros are to be counted.
/// \returns An unsigned 32-bit integer containing the number of trailing zero
///    bits in the operand.
static __inline__ unsigned int __RELAXED_FN_ATTRS
__tzcnt_u32(unsigned int __X)
{
  return __builtin_ia32_tzcnt_u32(__X);
}

/// Counts the number of trailing zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> TZCNT </c> instruction.
///
/// \param __X
///    An unsigned 32-bit integer whose trailing zeros are to be counted.
/// \returns An 32-bit integer containing the number of trailing zero bits in
///    the operand.
static __inline__ int __RELAXED_FN_ATTRS
_mm_tzcnt_32(unsigned int __X)
{
  return __builtin_ia32_tzcnt_u32(__X);
}

#define _tzcnt_u32(a)     (__tzcnt_u32((a)))

#ifdef __x86_64__

/// Counts the number of trailing zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> TZCNT </c> instruction.
///
/// \param __X
///    An unsigned 64-bit integer whose trailing zeros are to be counted.
/// \returns An unsigned 64-bit integer containing the number of trailing zero
///    bits in the operand.
static __inline__ unsigned long long __RELAXED_FN_ATTRS
__tzcnt_u64(unsigned long long __X)
{
  return __builtin_ia32_tzcnt_u64(__X);
}

/// Counts the number of trailing zero bits in the operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> TZCNT </c> instruction.
///
/// \param __X
///    An unsigned 64-bit integer whose trailing zeros are to be counted.
/// \returns An 64-bit integer containing the number of trailing zero bits in
///    the operand.
static __inline__ long long __RELAXED_FN_ATTRS
_mm_tzcnt_64(unsigned long long __X)
{
  return __builtin_ia32_tzcnt_u64(__X);
}

#define _tzcnt_u64(a)     (__tzcnt_u64((a)))

#endif /* __x86_64__ */

#undef __RELAXED_FN_ATTRS

#if !(defined(_MSC_VER) || defined(__SCE__)) || __has_feature(modules) ||      \
    defined(__BMI__)

/* Define the default attributes for the functions in this file. */
#define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("bmi")))

#define _andn_u32(a, b)   (__andn_u32((a), (b)))

/* _bextr_u32 != __bextr_u32 */
#define _blsi_u32(a)      (__blsi_u32((a)))

#define _blsmsk_u32(a)    (__blsmsk_u32((a)))

#define _blsr_u32(a)      (__blsr_u32((a)))

/// Performs a bitwise AND of the second operand with the one's
///    complement of the first operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> ANDN </c> instruction.
///
/// \param __X
///    An unsigned integer containing one of the operands.
/// \param __Y
///    An unsigned integer containing one of the operands.
/// \returns An unsigned integer containing the bitwise AND of the second
///    operand with the one's complement of the first operand.
static __inline__ unsigned int __DEFAULT_FN_ATTRS
__andn_u32(unsigned int __X, unsigned int __Y)
{
  return ~__X & __Y;
}

/* AMD-specified, double-leading-underscore version of BEXTR */
/// Extracts the specified bits from the first operand and returns them
///    in the least significant bits of the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BEXTR </c> instruction.
///
/// \param __X
///    An unsigned integer whose bits are to be extracted.
/// \param __Y
///    An unsigned integer used to specify which bits are extracted. Bits [7:0]
///    specify the index of the least significant bit. Bits [15:8] specify the
///    number of bits to be extracted.
/// \returns An unsigned integer whose least significant bits contain the
///    extracted bits.
/// \see _bextr_u32
static __inline__ unsigned int __DEFAULT_FN_ATTRS
__bextr_u32(unsigned int __X, unsigned int __Y)
{
  return __builtin_ia32_bextr_u32(__X, __Y);
}

/* Intel-specified, single-leading-underscore version of BEXTR */
/// Extracts the specified bits from the first operand and returns them
///    in the least significant bits of the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BEXTR </c> instruction.
///
/// \param __X
///    An unsigned integer whose bits are to be extracted.
/// \param __Y
///    An unsigned integer used to specify the index of the least significant
///    bit for the bits to be extracted. Bits [7:0] specify the index.
/// \param __Z
///    An unsigned integer used to specify the number of bits to be extracted.
///    Bits [7:0] specify the number of bits.
/// \returns An unsigned integer whose least significant bits contain the
///    extracted bits.
/// \see __bextr_u32
static __inline__ unsigned int __DEFAULT_FN_ATTRS
_bextr_u32(unsigned int __X, unsigned int __Y, unsigned int __Z)
{
  return __builtin_ia32_bextr_u32 (__X, ((__Y & 0xff) | ((__Z & 0xff) << 8)));
}

/* Intel-specified, single-leading-underscore version of BEXTR2 */
/// Extracts the specified bits from the first operand and returns them
///    in the least significant bits of the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BEXTR </c> instruction.
///
/// \param __X
///    An unsigned integer whose bits are to be extracted.
/// \param __Y
///    An unsigned integer used to specify which bits are extracted. Bits [7:0]
///    specify the index of the least significant bit. Bits [15:8] specify the
///    number of bits to be extracted.
/// \returns An unsigned integer whose least significant bits contain the
///    extracted bits.
/// \see __bextr_u32
static __inline__ unsigned int __DEFAULT_FN_ATTRS
_bextr2_u32(unsigned int __X, unsigned int __Y) {
  return __builtin_ia32_bextr_u32(__X, __Y);
}

/// Clears all bits in the source except for the least significant bit
///    containing a value of 1 and returns the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BLSI </c> instruction.
///
/// \param __X
///    An unsigned integer whose bits are to be cleared.
/// \returns An unsigned integer containing the result of clearing the bits from
///    the source operand.
static __inline__ unsigned int __DEFAULT_FN_ATTRS
__blsi_u32(unsigned int __X)
{
  return __X & -__X;
}

/// Creates a mask whose bits are set to 1, using bit 0 up to and
///    including the least significant bit that is set to 1 in the source
///    operand and returns the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BLSMSK </c> instruction.
///
/// \param __X
///    An unsigned integer used to create the mask.
/// \returns An unsigned integer containing the newly created mask.
static __inline__ unsigned int __DEFAULT_FN_ATTRS
__blsmsk_u32(unsigned int __X)
{
  return __X ^ (__X - 1);
}

/// Clears the least significant bit that is set to 1 in the source
///    operand and returns the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BLSR </c> instruction.
///
/// \param __X
///    An unsigned integer containing the operand to be cleared.
/// \returns An unsigned integer containing the result of clearing the source
///    operand.
static __inline__ unsigned int __DEFAULT_FN_ATTRS
__blsr_u32(unsigned int __X)
{
  return __X & (__X - 1);
}

#ifdef __x86_64__

#define _andn_u64(a, b)   (__andn_u64((a), (b)))

/* _bextr_u64 != __bextr_u64 */
#define _blsi_u64(a)      (__blsi_u64((a)))

#define _blsmsk_u64(a)    (__blsmsk_u64((a)))

#define _blsr_u64(a)      (__blsr_u64((a)))

/// Performs a bitwise AND of the second operand with the one's
///    complement of the first operand.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> ANDN </c> instruction.
///
/// \param __X
///    An unsigned 64-bit integer containing one of the operands.
/// \param __Y
///    An unsigned 64-bit integer containing one of the operands.
/// \returns An unsigned 64-bit integer containing the bitwise AND of the second
///    operand with the one's complement of the first operand.
static __inline__ unsigned long long __DEFAULT_FN_ATTRS
__andn_u64 (unsigned long long __X, unsigned long long __Y)
{
  return ~__X & __Y;
}

/* AMD-specified, double-leading-underscore version of BEXTR */
/// Extracts the specified bits from the first operand and returns them
///    in the least significant bits of the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BEXTR </c> instruction.
///
/// \param __X
///    An unsigned 64-bit integer whose bits are to be extracted.
/// \param __Y
///    An unsigned 64-bit integer used to specify which bits are extracted. Bits
///    [7:0] specify the index of the least significant bit. Bits [15:8] specify
///    the number of bits to be extracted.
/// \returns An unsigned 64-bit integer whose least significant bits contain the
///    extracted bits.
/// \see _bextr_u64
static __inline__ unsigned long long __DEFAULT_FN_ATTRS
__bextr_u64(unsigned long long __X, unsigned long long __Y)
{
  return __builtin_ia32_bextr_u64(__X, __Y);
}

/* Intel-specified, single-leading-underscore version of BEXTR */
/// Extracts the specified bits from the first operand and returns them
///     in the least significant bits of the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BEXTR </c> instruction.
///
/// \param __X
///    An unsigned 64-bit integer whose bits are to be extracted.
/// \param __Y
///    An unsigned integer used to specify the index of the least significant
///    bit for the bits to be extracted. Bits [7:0] specify the index.
/// \param __Z
///    An unsigned integer used to specify the number of bits to be extracted.
///    Bits [7:0] specify the number of bits.
/// \returns An unsigned 64-bit integer whose least significant bits contain the
///    extracted bits.
/// \see __bextr_u64
static __inline__ unsigned long long __DEFAULT_FN_ATTRS
_bextr_u64(unsigned long long __X, unsigned int __Y, unsigned int __Z)
{
  return __builtin_ia32_bextr_u64 (__X, ((__Y & 0xff) | ((__Z & 0xff) << 8)));
}

/* Intel-specified, single-leading-underscore version of BEXTR2 */
/// Extracts the specified bits from the first operand and returns them
///    in the least significant bits of the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BEXTR </c> instruction.
///
/// \param __X
///    An unsigned 64-bit integer whose bits are to be extracted.
/// \param __Y
///    An unsigned 64-bit integer used to specify which bits are extracted. Bits
///    [7:0] specify the index of the least significant bit. Bits [15:8] specify
///    the number of bits to be extracted.
/// \returns An unsigned 64-bit integer whose least significant bits contain the
///    extracted bits.
/// \see __bextr_u64
static __inline__ unsigned long long __DEFAULT_FN_ATTRS
_bextr2_u64(unsigned long long __X, unsigned long long __Y) {
  return __builtin_ia32_bextr_u64(__X, __Y);
}

/// Clears all bits in the source except for the least significant bit
///    containing a value of 1 and returns the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BLSI </c> instruction.
///
/// \param __X
///    An unsigned 64-bit integer whose bits are to be cleared.
/// \returns An unsigned 64-bit integer containing the result of clearing the
///    bits from the source operand.
static __inline__ unsigned long long __DEFAULT_FN_ATTRS
__blsi_u64(unsigned long long __X)
{
  return __X & -__X;
}

/// Creates a mask whose bits are set to 1, using bit 0 up to and
///    including the least significant bit that is set to 1 in the source
///    operand and returns the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BLSMSK </c> instruction.
///
/// \param __X
///    An unsigned 64-bit integer used to create the mask.
/// \returns An unsigned 64-bit integer containing the newly created mask.
static __inline__ unsigned long long __DEFAULT_FN_ATTRS
__blsmsk_u64(unsigned long long __X)
{
  return __X ^ (__X - 1);
}

/// Clears the least significant bit that is set to 1 in the source
///    operand and returns the result.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> BLSR </c> instruction.
///
/// \param __X
///    An unsigned 64-bit integer containing the operand to be cleared.
/// \returns An unsigned 64-bit integer containing the result of clearing the
///    source operand.
static __inline__ unsigned long long __DEFAULT_FN_ATTRS
__blsr_u64(unsigned long long __X)
{
  return __X & (__X - 1);
}

#endif /* __x86_64__ */

#undef __DEFAULT_FN_ATTRS

#endif /* !(defined(_MSC_VER) || defined(__SCE__)) || __has_feature(modules)   \
          || defined(__BMI__) */

#endif /* __BMIINTRIN_H */