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28a4c9c5 | 1 | /* |
b3f22de0 | 2 | * This file is part of the PulseView project. |
28a4c9c5 JH |
3 | * |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
efdec55a | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
28a4c9c5 JH |
18 | */ |
19 | ||
1ec3e43f UH |
20 | #include "config.h" // For HAVE_UNALIGNED_LITTLE_ENDIAN_ACCESS |
21 | ||
cef18fc6 | 22 | #include <extdef.h> |
28a4c9c5 | 23 | |
eb8269e3 | 24 | #include <cassert> |
d9e71737 | 25 | #include <cmath> |
aca9aa83 UH |
26 | #include <cstdlib> |
27 | #include <cstring> | |
72708385 | 28 | #include <cstdint> |
4ceab49a | 29 | |
7db61e77 | 30 | #include "logic.hpp" |
f3d66e52 | 31 | #include "logicsegment.hpp" |
f556bc6a | 32 | |
fe3a1c21 | 33 | #include <libsigrokcxx/libsigrokcxx.hpp> |
e8d00928 | 34 | |
3b68d03d JH |
35 | using std::lock_guard; |
36 | using std::recursive_mutex; | |
819f4c25 JH |
37 | using std::max; |
38 | using std::min; | |
e8d00928 | 39 | using std::shared_ptr; |
6f925ba9 | 40 | using std::vector; |
e8d00928 ML |
41 | |
42 | using sigrok::Logic; | |
28a4c9c5 | 43 | |
51e77110 | 44 | namespace pv { |
1b1ec774 | 45 | namespace data { |
51e77110 | 46 | |
f3d66e52 JH |
47 | const int LogicSegment::MipMapScalePower = 4; |
48 | const int LogicSegment::MipMapScaleFactor = 1 << MipMapScalePower; | |
49 | const float LogicSegment::LogMipMapScaleFactor = logf(MipMapScaleFactor); | |
c063290a | 50 | const uint64_t LogicSegment::MipMapDataUnit = 64 * 1024; // bytes |
4ceab49a | 51 | |
85a70280 SA |
52 | LogicSegment::LogicSegment(pv::data::Logic& owner, uint32_t segment_id, |
53 | unsigned int unit_size, uint64_t samplerate) : | |
54 | Segment(segment_id, samplerate, unit_size), | |
9d22929c SA |
55 | owner_(owner), |
56 | last_append_sample_(0) | |
57 | { | |
58 | memset(mip_map_, 0, sizeof(mip_map_)); | |
59 | } | |
60 | ||
f3d66e52 | 61 | LogicSegment::~LogicSegment() |
4ceab49a | 62 | { |
8dbbc7f0 JH |
63 | lock_guard<recursive_mutex> lock(mutex_); |
64 | for (MipMapLevel &l : mip_map_) | |
4ceab49a JH |
65 | free(l.data); |
66 | } | |
67 | ||
97cb532f | 68 | inline uint64_t LogicSegment::unpack_sample(const uint8_t *ptr) const |
8cb71705 | 69 | { |
9df8453f MC |
70 | #ifdef HAVE_UNALIGNED_LITTLE_ENDIAN_ACCESS |
71 | return *(uint64_t*)ptr; | |
72 | #else | |
8cb71705 | 73 | uint64_t value = 0; |
2ad82c2e | 74 | switch (unit_size_) { |
8cb71705 MC |
75 | default: |
76 | value |= ((uint64_t)ptr[7]) << 56; | |
77 | /* FALLTHRU */ | |
78 | case 7: | |
79 | value |= ((uint64_t)ptr[6]) << 48; | |
80 | /* FALLTHRU */ | |
81 | case 6: | |
82 | value |= ((uint64_t)ptr[5]) << 40; | |
83 | /* FALLTHRU */ | |
84 | case 5: | |
85 | value |= ((uint64_t)ptr[4]) << 32; | |
86 | /* FALLTHRU */ | |
87 | case 4: | |
88 | value |= ((uint32_t)ptr[3]) << 24; | |
89 | /* FALLTHRU */ | |
90 | case 3: | |
91 | value |= ((uint32_t)ptr[2]) << 16; | |
92 | /* FALLTHRU */ | |
93 | case 2: | |
94 | value |= ptr[1] << 8; | |
95 | /* FALLTHRU */ | |
96 | case 1: | |
97 | value |= ptr[0]; | |
98 | /* FALLTHRU */ | |
99 | case 0: | |
100 | break; | |
101 | } | |
102 | return value; | |
9df8453f | 103 | #endif |
8cb71705 MC |
104 | } |
105 | ||
97cb532f | 106 | inline void LogicSegment::pack_sample(uint8_t *ptr, uint64_t value) |
8cb71705 | 107 | { |
9df8453f MC |
108 | #ifdef HAVE_UNALIGNED_LITTLE_ENDIAN_ACCESS |
109 | *(uint64_t*)ptr = value; | |
110 | #else | |
2ad82c2e | 111 | switch (unit_size_) { |
8cb71705 MC |
112 | default: |
113 | ptr[7] = value >> 56; | |
114 | /* FALLTHRU */ | |
115 | case 7: | |
116 | ptr[6] = value >> 48; | |
117 | /* FALLTHRU */ | |
118 | case 6: | |
119 | ptr[5] = value >> 40; | |
120 | /* FALLTHRU */ | |
121 | case 5: | |
122 | ptr[4] = value >> 32; | |
123 | /* FALLTHRU */ | |
124 | case 4: | |
125 | ptr[3] = value >> 24; | |
126 | /* FALLTHRU */ | |
127 | case 3: | |
128 | ptr[2] = value >> 16; | |
129 | /* FALLTHRU */ | |
130 | case 2: | |
131 | ptr[1] = value >> 8; | |
132 | /* FALLTHRU */ | |
133 | case 1: | |
134 | ptr[0] = value; | |
135 | /* FALLTHRU */ | |
136 | case 0: | |
137 | break; | |
138 | } | |
9df8453f | 139 | #endif |
8cb71705 MC |
140 | } |
141 | ||
7db61e77 | 142 | void LogicSegment::append_payload(shared_ptr<sigrok::Logic> logic) |
28a4c9c5 | 143 | { |
8dbbc7f0 JH |
144 | assert(unit_size_ == logic->unit_size()); |
145 | assert((logic->data_length() % unit_size_) == 0); | |
f556bc6a | 146 | |
9d22929c SA |
147 | append_payload(logic->data_pointer(), logic->data_length()); |
148 | } | |
149 | ||
150 | void LogicSegment::append_payload(void *data, uint64_t data_size) | |
151 | { | |
152 | assert((data_size % unit_size_) == 0); | |
153 | ||
8dbbc7f0 | 154 | lock_guard<recursive_mutex> lock(mutex_); |
7d29656f | 155 | |
cc69e8ae UH |
156 | const uint64_t prev_sample_count = sample_count_; |
157 | const uint64_t sample_count = data_size / unit_size_; | |
7db61e77 | 158 | |
9d22929c | 159 | append_samples(data, sample_count); |
4ceab49a JH |
160 | |
161 | // Generate the first mip-map from the data | |
162 | append_payload_to_mipmap(); | |
7db61e77 SA |
163 | |
164 | if (sample_count > 1) | |
165 | owner_.notify_samples_added(this, prev_sample_count + 1, | |
166 | prev_sample_count + 1 + sample_count); | |
167 | else | |
168 | owner_.notify_samples_added(this, prev_sample_count + 1, | |
169 | prev_sample_count + 1); | |
4ceab49a JH |
170 | } |
171 | ||
b82243f7 SA |
172 | void LogicSegment::get_samples(int64_t start_sample, |
173 | int64_t end_sample, uint8_t* dest) const | |
ed990f11 | 174 | { |
ed990f11 | 175 | assert(start_sample >= 0); |
8dbbc7f0 | 176 | assert(start_sample <= (int64_t)sample_count_); |
ed990f11 | 177 | assert(end_sample >= 0); |
8dbbc7f0 | 178 | assert(end_sample <= (int64_t)sample_count_); |
ed990f11 | 179 | assert(start_sample <= end_sample); |
b82243f7 | 180 | assert(dest != nullptr); |
ed990f11 | 181 | |
8dbbc7f0 | 182 | lock_guard<recursive_mutex> lock(mutex_); |
ed990f11 | 183 | |
b82243f7 | 184 | get_raw_samples(start_sample, (end_sample - start_sample), dest); |
26a883ed SA |
185 | } |
186 | ||
c70e3464 | 187 | SegmentLogicDataIterator* LogicSegment::begin_sample_iteration(uint64_t start) |
26a883ed SA |
188 | { |
189 | return (SegmentLogicDataIterator*)begin_raw_sample_iteration(start); | |
190 | } | |
191 | ||
c70e3464 | 192 | void LogicSegment::continue_sample_iteration(SegmentLogicDataIterator* it, uint64_t increase) |
26a883ed SA |
193 | { |
194 | Segment::continue_raw_sample_iteration((SegmentRawDataIterator*)it, increase); | |
195 | } | |
196 | ||
c70e3464 | 197 | void LogicSegment::end_sample_iteration(SegmentLogicDataIterator* it) |
26a883ed SA |
198 | { |
199 | Segment::end_raw_sample_iteration((SegmentRawDataIterator*)it); | |
ed990f11 JH |
200 | } |
201 | ||
f3d66e52 | 202 | void LogicSegment::reallocate_mipmap_level(MipMapLevel &m) |
4ceab49a | 203 | { |
26a883ed SA |
204 | lock_guard<recursive_mutex> lock(mutex_); |
205 | ||
4ceab49a JH |
206 | const uint64_t new_data_length = ((m.length + MipMapDataUnit - 1) / |
207 | MipMapDataUnit) * MipMapDataUnit; | |
26a883ed | 208 | |
2ad82c2e | 209 | if (new_data_length > m.data_length) { |
4ceab49a | 210 | m.data_length = new_data_length; |
8fe60279 JH |
211 | |
212 | // Padding is added to allow for the uint64_t write word | |
8dbbc7f0 | 213 | m.data = realloc(m.data, new_data_length * unit_size_ + |
8fe60279 | 214 | sizeof(uint64_t)); |
4ceab49a JH |
215 | } |
216 | } | |
217 | ||
f3d66e52 | 218 | void LogicSegment::append_payload_to_mipmap() |
4ceab49a | 219 | { |
8dbbc7f0 | 220 | MipMapLevel &m0 = mip_map_[0]; |
4ceab49a | 221 | uint64_t prev_length; |
4ceab49a | 222 | uint8_t *dest_ptr; |
26a883ed | 223 | SegmentRawDataIterator* it; |
4ceab49a JH |
224 | uint64_t accumulator; |
225 | unsigned int diff_counter; | |
226 | ||
227 | // Expand the data buffer to fit the new samples | |
228 | prev_length = m0.length; | |
8dbbc7f0 | 229 | m0.length = sample_count_ / MipMapScaleFactor; |
4ceab49a JH |
230 | |
231 | // Break off if there are no new samples to compute | |
333d5bbc | 232 | if (m0.length == prev_length) |
4ceab49a JH |
233 | return; |
234 | ||
023887ca | 235 | reallocate_mipmap_level(m0); |
4ceab49a | 236 | |
8dbbc7f0 | 237 | dest_ptr = (uint8_t*)m0.data + prev_length * unit_size_; |
4ceab49a JH |
238 | |
239 | // Iterate through the samples to populate the first level mipmap | |
cc69e8ae UH |
240 | const uint64_t start_sample = prev_length * MipMapScaleFactor; |
241 | const uint64_t end_sample = m0.length * MipMapScaleFactor; | |
26a883ed SA |
242 | |
243 | it = begin_raw_sample_iteration(start_sample); | |
244 | for (uint64_t i = start_sample; i < end_sample;) { | |
4ceab49a JH |
245 | // Accumulate transitions which have occurred in this sample |
246 | accumulator = 0; | |
247 | diff_counter = MipMapScaleFactor; | |
2ad82c2e | 248 | while (diff_counter-- > 0) { |
26a883ed | 249 | const uint64_t sample = unpack_sample(it->value); |
8dbbc7f0 JH |
250 | accumulator |= last_append_sample_ ^ sample; |
251 | last_append_sample_ = sample; | |
26a883ed SA |
252 | continue_raw_sample_iteration(it, 1); |
253 | i++; | |
4ceab49a JH |
254 | } |
255 | ||
8cb71705 | 256 | pack_sample(dest_ptr, accumulator); |
8dbbc7f0 | 257 | dest_ptr += unit_size_; |
4ceab49a | 258 | } |
26a883ed | 259 | end_raw_sample_iteration(it); |
4ceab49a JH |
260 | |
261 | // Compute higher level mipmaps | |
2ad82c2e | 262 | for (unsigned int level = 1; level < ScaleStepCount; level++) { |
8dbbc7f0 | 263 | MipMapLevel &m = mip_map_[level]; |
c063290a | 264 | const MipMapLevel &ml = mip_map_[level - 1]; |
4ceab49a JH |
265 | |
266 | // Expand the data buffer to fit the new samples | |
267 | prev_length = m.length; | |
268 | m.length = ml.length / MipMapScaleFactor; | |
269 | ||
26a883ed | 270 | // Break off if there are no more samples to be computed |
333d5bbc | 271 | if (m.length == prev_length) |
4ceab49a JH |
272 | break; |
273 | ||
023887ca | 274 | reallocate_mipmap_level(m); |
4ceab49a | 275 | |
26a883ed SA |
276 | // Subsample the lower level |
277 | const uint8_t* src_ptr = (uint8_t*)ml.data + | |
8dbbc7f0 | 278 | unit_size_ * prev_length * MipMapScaleFactor; |
023887ca | 279 | const uint8_t *const end_dest_ptr = |
8dbbc7f0 | 280 | (uint8_t*)m.data + unit_size_ * m.length; |
26a883ed | 281 | |
333d5bbc | 282 | for (dest_ptr = (uint8_t*)m.data + |
2ad82c2e UH |
283 | unit_size_ * prev_length; |
284 | dest_ptr < end_dest_ptr; | |
285 | dest_ptr += unit_size_) { | |
4ceab49a JH |
286 | accumulator = 0; |
287 | diff_counter = MipMapScaleFactor; | |
2ad82c2e | 288 | while (diff_counter-- > 0) { |
8cb71705 | 289 | accumulator |= unpack_sample(src_ptr); |
8dbbc7f0 | 290 | src_ptr += unit_size_; |
4ceab49a JH |
291 | } |
292 | ||
8cb71705 | 293 | pack_sample(dest_ptr, accumulator); |
4ceab49a JH |
294 | } |
295 | } | |
28a4c9c5 | 296 | } |
2858b391 | 297 | |
26a883ed | 298 | uint64_t LogicSegment::get_unpacked_sample(uint64_t index) const |
2858b391 | 299 | { |
8dbbc7f0 | 300 | assert(index < sample_count_); |
2858b391 | 301 | |
4d08da71 SA |
302 | assert(unit_size_ <= 8); // 8 * 8 = 64 channels |
303 | uint8_t data[8]; | |
304 | ||
b82243f7 | 305 | get_raw_samples(index, 1, data); |
26a883ed | 306 | |
cc69e8ae | 307 | return unpack_sample(data); |
2858b391 JH |
308 | } |
309 | ||
f3d66e52 | 310 | void LogicSegment::get_subsampled_edges( |
6f925ba9 | 311 | vector<EdgePair> &edges, |
60b0c2da | 312 | uint64_t start, uint64_t end, |
0b02e057 | 313 | float min_length, int sig_index) |
2858b391 | 314 | { |
60b0c2da JH |
315 | uint64_t index = start; |
316 | unsigned int level; | |
7d0d64f9 JH |
317 | bool last_sample; |
318 | bool fast_forward; | |
0b02e057 | 319 | |
2858b391 | 320 | assert(start <= end); |
0b02e057 | 321 | assert(min_length > 0); |
2858b391 | 322 | assert(sig_index >= 0); |
80d50141 | 323 | assert(sig_index < 64); |
2858b391 | 324 | |
8dbbc7f0 | 325 | lock_guard<recursive_mutex> lock(mutex_); |
7d29656f | 326 | |
4cc0df94 SA |
327 | // Make sure we only process as many samples as we have |
328 | if (end > get_sample_count()) | |
329 | end = get_sample_count(); | |
330 | ||
60b0c2da JH |
331 | const uint64_t block_length = (uint64_t)max(min_length, 1.0f); |
332 | const unsigned int min_level = max((int)floorf(logf(min_length) / | |
0b02e057 | 333 | LogMipMapScaleFactor) - 1, 0); |
7d0d64f9 | 334 | const uint64_t sig_mask = 1ULL << sig_index; |
2858b391 | 335 | |
7d0d64f9 | 336 | // Store the initial state |
26a883ed | 337 | last_sample = (get_unpacked_sample(start) & sig_mask) != 0; |
326cf6fe | 338 | edges.emplace_back(index++, last_sample); |
2858b391 | 339 | |
2ad82c2e | 340 | while (index + block_length <= end) { |
7d0d64f9 | 341 | //----- Continue to search -----// |
0b02e057 | 342 | level = min_level; |
f06ab143 JH |
343 | |
344 | // We cannot fast-forward if there is no mip-map data at | |
53aa9bb4 | 345 | // the minimum level. |
4c60462b | 346 | fast_forward = (mip_map_[level].data != nullptr); |
2858b391 | 347 | |
2ad82c2e | 348 | if (min_length < MipMapScaleFactor) { |
0b02e057 JH |
349 | // Search individual samples up to the beginning of |
350 | // the next first level mip map block | |
53aa9bb4 | 351 | const uint64_t final_index = min(end, pow2_ceil(index, MipMapScalePower)); |
0b02e057 | 352 | |
333d5bbc | 353 | for (; index < final_index && |
c28fa62b | 354 | (index & ~((uint64_t)(~0) << MipMapScalePower)) != 0; |
2ad82c2e | 355 | index++) { |
53aa9bb4 SA |
356 | |
357 | const bool sample = (get_unpacked_sample(index) & sig_mask) != 0; | |
7d0d64f9 JH |
358 | |
359 | // If there was a change we cannot fast forward | |
333d5bbc | 360 | if (sample != last_sample) { |
7d0d64f9 | 361 | fast_forward = false; |
0b02e057 | 362 | break; |
7d0d64f9 | 363 | } |
0b02e057 | 364 | } |
2ad82c2e | 365 | } else { |
0b02e057 JH |
366 | // If resolution is less than a mip map block, |
367 | // round up to the beginning of the mip-map block | |
368 | // for this level of detail | |
53aa9bb4 | 369 | const int min_level_scale_power = (level + 1) * MipMapScalePower; |
0b02e057 | 370 | index = pow2_ceil(index, min_level_scale_power); |
333d5bbc | 371 | if (index >= end) |
0b02e057 JH |
372 | break; |
373 | ||
7d0d64f9 | 374 | // We can fast forward only if there was no change |
53aa9bb4 | 375 | const bool sample = (get_unpacked_sample(index) & sig_mask) != 0; |
f06ab143 JH |
376 | if (last_sample != sample) |
377 | fast_forward = false; | |
0b02e057 JH |
378 | } |
379 | ||
333d5bbc | 380 | if (fast_forward) { |
7d0d64f9 JH |
381 | |
382 | // Fast forward: This involves zooming out to higher | |
383 | // levels of the mip map searching for changes, then | |
384 | // zooming in on them to find the point where the edge | |
385 | // begins. | |
386 | ||
387 | // Slide right and zoom out at the beginnings of mip-map | |
388 | // blocks until we encounter a change | |
1f1d55ce | 389 | while (true) { |
53aa9bb4 SA |
390 | const int level_scale_power = (level + 1) * MipMapScalePower; |
391 | const uint64_t offset = index >> level_scale_power; | |
7d0d64f9 JH |
392 | |
393 | // Check if we reached the last block at this | |
394 | // level, or if there was a change in this block | |
8dbbc7f0 | 395 | if (offset >= mip_map_[level].length || |
53aa9bb4 | 396 | (get_subsample(level, offset) & sig_mask)) |
0b02e057 JH |
397 | break; |
398 | ||
c28fa62b | 399 | if ((offset & ~((uint64_t)(~0) << MipMapScalePower)) == 0) { |
7d0d64f9 JH |
400 | // If we are now at the beginning of a |
401 | // higher level mip-map block ascend one | |
402 | // level | |
53aa9bb4 | 403 | if ((level + 1 >= ScaleStepCount) || (!mip_map_[level + 1].data)) |
7d0d64f9 JH |
404 | break; |
405 | ||
406 | level++; | |
407 | } else { | |
408 | // Slide right to the beginning of the | |
409 | // next mip map block | |
53aa9bb4 | 410 | index = pow2_ceil(index + 1, level_scale_power); |
7d0d64f9 | 411 | } |
0b02e057 | 412 | } |
7d0d64f9 JH |
413 | |
414 | // Zoom in, and slide right until we encounter a change, | |
415 | // and repeat until we reach min_level | |
1f1d55ce | 416 | while (true) { |
8dbbc7f0 | 417 | assert(mip_map_[level].data); |
7d0d64f9 | 418 | |
53aa9bb4 SA |
419 | const int level_scale_power = (level + 1) * MipMapScalePower; |
420 | const uint64_t offset = index >> level_scale_power; | |
7d0d64f9 JH |
421 | |
422 | // Check if we reached the last block at this | |
423 | // level, or if there was a change in this block | |
8dbbc7f0 | 424 | if (offset >= mip_map_[level].length || |
53aa9bb4 | 425 | (get_subsample(level, offset) & sig_mask)) { |
7d0d64f9 JH |
426 | // Zoom in unless we reached the minimum |
427 | // zoom | |
333d5bbc | 428 | if (level == min_level) |
7d0d64f9 JH |
429 | break; |
430 | ||
431 | level--; | |
432 | } else { | |
433 | // Slide right to the beginning of the | |
434 | // next mip map block | |
53aa9bb4 | 435 | index = pow2_ceil(index + 1, level_scale_power); |
7d0d64f9 | 436 | } |
0b02e057 | 437 | } |
0b02e057 | 438 | |
7d0d64f9 JH |
439 | // If individual samples within the limit of resolution, |
440 | // do a linear search for the next transition within the | |
441 | // block | |
333d5bbc UH |
442 | if (min_length < MipMapScaleFactor) { |
443 | for (; index < end; index++) { | |
53aa9bb4 | 444 | const bool sample = (get_unpacked_sample(index) & sig_mask) != 0; |
333d5bbc | 445 | if (sample != last_sample) |
7d0d64f9 JH |
446 | break; |
447 | } | |
0b02e057 JH |
448 | } |
449 | } | |
450 | ||
7d0d64f9 JH |
451 | //----- Store the edge -----// |
452 | ||
453 | // Take the last sample of the quanization block | |
454 | const int64_t final_index = index + block_length; | |
333d5bbc | 455 | if (index + block_length > end) |
7d0d64f9 JH |
456 | break; |
457 | ||
458 | // Store the final state | |
53aa9bb4 | 459 | const bool final_sample = (get_unpacked_sample(final_index - 1) & sig_mask) != 0; |
326cf6fe | 460 | edges.emplace_back(index, final_sample); |
7d0d64f9 JH |
461 | |
462 | index = final_index; | |
463 | last_sample = final_sample; | |
2858b391 JH |
464 | } |
465 | ||
466 | // Add the final state | |
26a883ed | 467 | const bool end_sample = get_unpacked_sample(end) & sig_mask; |
175d6573 | 468 | if (last_sample != end_sample) |
326cf6fe UH |
469 | edges.emplace_back(end, end_sample); |
470 | edges.emplace_back(end + 1, end_sample); | |
2858b391 | 471 | } |
0b02e057 | 472 | |
f3d66e52 | 473 | uint64_t LogicSegment::get_subsample(int level, uint64_t offset) const |
b2bcbe51 JH |
474 | { |
475 | assert(level >= 0); | |
8dbbc7f0 JH |
476 | assert(mip_map_[level].data); |
477 | return unpack_sample((uint8_t*)mip_map_[level].data + | |
478 | unit_size_ * offset); | |
b2bcbe51 JH |
479 | } |
480 | ||
f3d66e52 | 481 | uint64_t LogicSegment::pow2_ceil(uint64_t x, unsigned int power) |
0b02e057 | 482 | { |
72708385 | 483 | const uint64_t p = UINT64_C(1) << power; |
60b0c2da | 484 | return (x + p - 1) / p * p; |
0b02e057 | 485 | } |
51e77110 | 486 | |
1b1ec774 | 487 | } // namespace data |
51e77110 | 488 | } // namespace pv |