Mercurial > hg > CbC > CbC_gcc
annotate gcc/sbitmap.c @ 59:5b5b9ea5b220
fix
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 15 Feb 2010 17:22:24 +0900 |
| parents | 77e2b8dfacca |
| children | b7f97abdc517 |
| rev | line source |
|---|---|
| 0 | 1 /* Simple bitmaps. |
| 2 Copyright (C) 1999, 2000, 2002, 2003, 2004, 2006, 2007, 2008 | |
| 3 Free Software Foundation, Inc. | |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it under | |
| 8 the terms of the GNU General Public License as published by the Free | |
| 9 Software Foundation; either version 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #include "config.h" | |
| 22 #include "system.h" | |
| 23 #include "coretypes.h" | |
| 24 #include "tm.h" | |
| 25 #include "rtl.h" | |
| 26 #include "flags.h" | |
| 27 #include "hard-reg-set.h" | |
| 28 #include "obstack.h" | |
| 29 #include "basic-block.h" | |
| 30 | |
| 31 #if GCC_VERSION >= 3400 | |
| 32 #if HOST_BITS_PER_WIDEST_FAST_INT == HOST_BITS_PER_LONG | |
| 33 #define do_popcount(x) __builtin_popcountl(x) | |
| 34 #elif HOST_BITS_PER_WIDEST_FAST_INT == HOST_BITS_PER_LONGLONG | |
| 35 #define do_popcount(x) __builtin_popcountll(x) | |
| 36 #else | |
| 37 #error "internal error: sbitmap.h and hwint.h are inconsistent" | |
| 38 #endif | |
| 39 #else | |
| 40 static unsigned long sbitmap_elt_popcount (SBITMAP_ELT_TYPE); | |
| 41 #define do_popcount(x) sbitmap_elt_popcount((x)) | |
| 42 #endif | |
| 43 | |
| 44 /* This macro controls debugging that is as expensive as the | |
| 45 operations it verifies. */ | |
| 46 | |
| 47 /* #define BITMAP_DEBUGGING */ | |
| 48 #ifdef BITMAP_DEBUGGING | |
| 49 | |
| 50 /* Verify the population count of sbitmap A matches the cached value, | |
| 51 if there is a cached value. */ | |
| 52 | |
| 53 void | |
| 54 sbitmap_verify_popcount (const_sbitmap a) | |
| 55 { | |
| 56 unsigned ix; | |
| 57 unsigned int lastword; | |
|
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58 |
| 0 | 59 if (!a->popcount) |
| 60 return; | |
| 61 | |
| 62 lastword = a->size; | |
| 63 for (ix = 0; ix < lastword; ix++) | |
| 64 gcc_assert (a->popcount[ix] == do_popcount (a->elms[ix])); | |
| 65 } | |
| 66 #endif | |
| 67 | |
| 68 /* Bitmap manipulation routines. */ | |
| 69 | |
| 70 /* Allocate a simple bitmap of N_ELMS bits. */ | |
| 71 | |
| 72 sbitmap | |
| 73 sbitmap_alloc (unsigned int n_elms) | |
| 74 { | |
| 75 unsigned int bytes, size, amt; | |
| 76 sbitmap bmap; | |
| 77 | |
| 78 size = SBITMAP_SET_SIZE (n_elms); | |
| 79 bytes = size * sizeof (SBITMAP_ELT_TYPE); | |
| 80 amt = (sizeof (struct simple_bitmap_def) | |
| 81 + bytes - sizeof (SBITMAP_ELT_TYPE)); | |
| 82 bmap = (sbitmap) xmalloc (amt); | |
| 83 bmap->n_bits = n_elms; | |
| 84 bmap->size = size; | |
| 85 bmap->popcount = NULL; | |
| 86 return bmap; | |
| 87 } | |
| 88 | |
| 89 /* Allocate a simple bitmap of N_ELMS bits, and a popcount array. */ | |
| 90 | |
| 91 sbitmap | |
| 92 sbitmap_alloc_with_popcount (unsigned int n_elms) | |
| 93 { | |
|
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94 sbitmap const bmap = sbitmap_alloc (n_elms); |
| 0 | 95 bmap->popcount = XNEWVEC (unsigned char, bmap->size); |
| 96 return bmap; | |
| 97 } | |
| 98 | |
| 99 /* Resize a simple bitmap BMAP to N_ELMS bits. If increasing the | |
| 100 size of BMAP, clear the new bits to zero if the DEF argument | |
| 101 is zero, and set them to one otherwise. */ | |
| 102 | |
| 103 sbitmap | |
| 104 sbitmap_resize (sbitmap bmap, unsigned int n_elms, int def) | |
| 105 { | |
| 106 unsigned int bytes, size, amt; | |
| 107 unsigned int last_bit; | |
| 108 | |
| 109 size = SBITMAP_SET_SIZE (n_elms); | |
| 110 bytes = size * sizeof (SBITMAP_ELT_TYPE); | |
| 111 if (bytes > SBITMAP_SIZE_BYTES (bmap)) | |
| 112 { | |
| 113 amt = (sizeof (struct simple_bitmap_def) | |
| 114 + bytes - sizeof (SBITMAP_ELT_TYPE)); | |
| 115 bmap = (sbitmap) xrealloc (bmap, amt); | |
| 116 if (bmap->popcount) | |
| 117 bmap->popcount = XRESIZEVEC (unsigned char, bmap->popcount, size); | |
| 118 } | |
| 119 | |
| 120 if (n_elms > bmap->n_bits) | |
| 121 { | |
| 122 if (def) | |
| 123 { | |
|
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124 memset (bmap->elms + bmap->size, -1, |
| 0 | 125 bytes - SBITMAP_SIZE_BYTES (bmap)); |
| 126 | |
| 127 /* Set the new bits if the original last element. */ | |
| 128 last_bit = bmap->n_bits % SBITMAP_ELT_BITS; | |
| 129 if (last_bit) | |
| 130 bmap->elms[bmap->size - 1] | |
| 131 |= ~((SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit)); | |
| 132 | |
| 133 /* Clear the unused bit in the new last element. */ | |
| 134 last_bit = n_elms % SBITMAP_ELT_BITS; | |
| 135 if (last_bit) | |
| 136 bmap->elms[size - 1] | |
| 137 &= (SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit); | |
| 138 } | |
| 139 else | |
| 140 { | |
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141 memset (bmap->elms + bmap->size, 0, |
| 0 | 142 bytes - SBITMAP_SIZE_BYTES (bmap)); |
| 143 if (bmap->popcount) | |
| 144 memset (bmap->popcount + bmap->size, 0, | |
|
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145 (size * sizeof (unsigned char)) |
| 0 | 146 - (bmap->size * sizeof (unsigned char))); |
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147 |
| 0 | 148 } |
| 149 } | |
| 150 else if (n_elms < bmap->n_bits) | |
| 151 { | |
| 152 /* Clear the surplus bits in the last word. */ | |
| 153 last_bit = n_elms % SBITMAP_ELT_BITS; | |
| 154 if (last_bit) | |
| 155 { | |
| 156 bmap->elms[size - 1] | |
| 157 &= (SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit); | |
| 158 if (bmap->popcount) | |
| 159 bmap->popcount[size - 1] = do_popcount (bmap->elms[size - 1]); | |
| 160 } | |
| 161 } | |
| 162 | |
| 163 bmap->n_bits = n_elms; | |
| 164 bmap->size = size; | |
| 165 return bmap; | |
| 166 } | |
| 167 | |
| 168 /* Re-allocate a simple bitmap of N_ELMS bits. New storage is uninitialized. */ | |
| 169 | |
| 170 sbitmap | |
| 171 sbitmap_realloc (sbitmap src, unsigned int n_elms) | |
| 172 { | |
| 173 unsigned int bytes, size, amt; | |
| 174 sbitmap bmap; | |
| 175 | |
| 176 size = SBITMAP_SET_SIZE (n_elms); | |
| 177 bytes = size * sizeof (SBITMAP_ELT_TYPE); | |
| 178 amt = (sizeof (struct simple_bitmap_def) | |
| 179 + bytes - sizeof (SBITMAP_ELT_TYPE)); | |
| 180 | |
| 181 if (SBITMAP_SIZE_BYTES (src) >= bytes) | |
| 182 { | |
| 183 src->n_bits = n_elms; | |
| 184 return src; | |
| 185 } | |
| 186 | |
| 187 bmap = (sbitmap) xrealloc (src, amt); | |
| 188 bmap->n_bits = n_elms; | |
| 189 bmap->size = size; | |
| 190 return bmap; | |
| 191 } | |
| 192 | |
| 193 /* Allocate a vector of N_VECS bitmaps of N_ELMS bits. */ | |
| 194 | |
| 195 sbitmap * | |
| 196 sbitmap_vector_alloc (unsigned int n_vecs, unsigned int n_elms) | |
| 197 { | |
| 198 unsigned int i, bytes, offset, elm_bytes, size, amt, vector_bytes; | |
| 199 sbitmap *bitmap_vector; | |
| 200 | |
| 201 size = SBITMAP_SET_SIZE (n_elms); | |
| 202 bytes = size * sizeof (SBITMAP_ELT_TYPE); | |
| 203 elm_bytes = (sizeof (struct simple_bitmap_def) | |
| 204 + bytes - sizeof (SBITMAP_ELT_TYPE)); | |
| 205 vector_bytes = n_vecs * sizeof (sbitmap *); | |
| 206 | |
| 207 /* Round up `vector_bytes' to account for the alignment requirements | |
| 208 of an sbitmap. One could allocate the vector-table and set of sbitmaps | |
| 209 separately, but that requires maintaining two pointers or creating | |
| 210 a cover struct to hold both pointers (so our result is still just | |
| 211 one pointer). Neither is a bad idea, but this is simpler for now. */ | |
| 212 { | |
| 213 /* Based on DEFAULT_ALIGNMENT computation in obstack.c. */ | |
| 214 struct { char x; SBITMAP_ELT_TYPE y; } align; | |
| 215 int alignment = (char *) & align.y - & align.x; | |
| 216 vector_bytes = (vector_bytes + alignment - 1) & ~ (alignment - 1); | |
| 217 } | |
| 218 | |
| 219 amt = vector_bytes + (n_vecs * elm_bytes); | |
| 220 bitmap_vector = (sbitmap *) xmalloc (amt); | |
| 221 | |
| 222 for (i = 0, offset = vector_bytes; i < n_vecs; i++, offset += elm_bytes) | |
| 223 { | |
| 224 sbitmap b = (sbitmap) ((char *) bitmap_vector + offset); | |
| 225 | |
| 226 bitmap_vector[i] = b; | |
| 227 b->n_bits = n_elms; | |
| 228 b->size = size; | |
| 229 b->popcount = NULL; | |
| 230 } | |
| 231 | |
| 232 return bitmap_vector; | |
| 233 } | |
| 234 | |
| 235 /* Copy sbitmap SRC to DST. */ | |
| 236 | |
| 237 void | |
| 238 sbitmap_copy (sbitmap dst, const_sbitmap src) | |
| 239 { | |
| 240 memcpy (dst->elms, src->elms, sizeof (SBITMAP_ELT_TYPE) * dst->size); | |
| 241 if (dst->popcount) | |
| 242 memcpy (dst->popcount, src->popcount, sizeof (unsigned char) * dst->size); | |
| 243 } | |
| 244 | |
| 245 /* Copy the first N elements of sbitmap SRC to DST. */ | |
| 246 | |
| 247 void | |
| 248 sbitmap_copy_n (sbitmap dst, const_sbitmap src, unsigned int n) | |
| 249 { | |
|
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250 memcpy (dst->elms, src->elms, sizeof (SBITMAP_ELT_TYPE) * n); |
| 0 | 251 if (dst->popcount) |
| 252 memcpy (dst->popcount, src->popcount, sizeof (unsigned char) * n); | |
| 253 } | |
| 254 | |
| 255 /* Determine if a == b. */ | |
| 256 int | |
| 257 sbitmap_equal (const_sbitmap a, const_sbitmap b) | |
| 258 { | |
| 259 return !memcmp (a->elms, b->elms, sizeof (SBITMAP_ELT_TYPE) * a->size); | |
| 260 } | |
| 261 | |
| 262 /* Return true if the bitmap is empty. */ | |
| 263 | |
| 264 bool | |
| 265 sbitmap_empty_p (const_sbitmap bmap) | |
| 266 { | |
| 267 unsigned int i; | |
| 268 for (i=0; i<bmap->size; i++) | |
| 269 if (bmap->elms[i]) | |
| 270 return false; | |
| 271 | |
| 272 return true; | |
| 273 } | |
| 274 | |
| 275 /* Return false if any of the N bits are set in MAP starting at | |
| 276 START. */ | |
| 277 | |
|
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278 bool |
| 0 | 279 sbitmap_range_empty_p (const_sbitmap bmap, unsigned int start, unsigned int n) |
| 280 { | |
| 281 unsigned int i = start / SBITMAP_ELT_BITS; | |
| 282 SBITMAP_ELT_TYPE elm; | |
| 283 unsigned int shift = start % SBITMAP_ELT_BITS; | |
| 284 | |
| 285 gcc_assert (bmap->n_bits >= start + n); | |
| 286 | |
| 287 elm = bmap->elms[i]; | |
| 288 elm = elm >> shift; | |
| 289 | |
| 290 if (shift + n <= SBITMAP_ELT_BITS) | |
| 291 { | |
| 292 /* The bits are totally contained in a single element. */ | |
| 293 if (shift + n < SBITMAP_ELT_BITS) | |
| 294 elm &= ((1 << n) - 1); | |
| 295 return (elm == 0); | |
| 296 } | |
| 297 | |
|
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298 if (elm) |
| 0 | 299 return false; |
| 300 | |
| 301 n -= SBITMAP_ELT_BITS - shift; | |
| 302 i++; | |
| 303 | |
| 304 /* Deal with full elts. */ | |
| 305 while (n >= SBITMAP_ELT_BITS) | |
| 306 { | |
| 307 if (bmap->elms[i]) | |
| 308 return false; | |
| 309 i++; | |
| 310 n -= SBITMAP_ELT_BITS; | |
| 311 } | |
| 312 | |
| 313 /* The leftover bits. */ | |
| 314 if (n) | |
| 315 { | |
| 316 elm = bmap->elms[i]; | |
| 317 elm &= ((1 << n) - 1); | |
| 318 return (elm == 0); | |
|
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319 } |
| 0 | 320 |
| 321 return true; | |
| 322 } | |
| 323 | |
| 324 | |
| 325 | |
| 326 /* Zero all elements in a bitmap. */ | |
| 327 | |
| 328 void | |
| 329 sbitmap_zero (sbitmap bmap) | |
| 330 { | |
| 331 memset (bmap->elms, 0, SBITMAP_SIZE_BYTES (bmap)); | |
| 332 if (bmap->popcount) | |
| 333 memset (bmap->popcount, 0, bmap->size * sizeof (unsigned char)); | |
| 334 } | |
| 335 | |
| 336 /* Set all elements in a bitmap to ones. */ | |
| 337 | |
| 338 void | |
| 339 sbitmap_ones (sbitmap bmap) | |
| 340 { | |
| 341 unsigned int last_bit; | |
| 342 | |
| 343 memset (bmap->elms, -1, SBITMAP_SIZE_BYTES (bmap)); | |
| 344 if (bmap->popcount) | |
| 345 memset (bmap->popcount, -1, bmap->size * sizeof (unsigned char)); | |
| 346 | |
| 347 last_bit = bmap->n_bits % SBITMAP_ELT_BITS; | |
| 348 if (last_bit) | |
| 349 { | |
| 350 bmap->elms[bmap->size - 1] | |
| 351 = (SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit); | |
| 352 if (bmap->popcount) | |
|
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353 bmap->popcount[bmap->size - 1] |
| 0 | 354 = do_popcount (bmap->elms[bmap->size - 1]); |
| 355 } | |
| 356 } | |
| 357 | |
| 358 /* Zero a vector of N_VECS bitmaps. */ | |
| 359 | |
| 360 void | |
| 361 sbitmap_vector_zero (sbitmap *bmap, unsigned int n_vecs) | |
| 362 { | |
| 363 unsigned int i; | |
| 364 | |
| 365 for (i = 0; i < n_vecs; i++) | |
| 366 sbitmap_zero (bmap[i]); | |
| 367 } | |
| 368 | |
| 369 /* Set a vector of N_VECS bitmaps to ones. */ | |
| 370 | |
| 371 void | |
| 372 sbitmap_vector_ones (sbitmap *bmap, unsigned int n_vecs) | |
| 373 { | |
| 374 unsigned int i; | |
| 375 | |
| 376 for (i = 0; i < n_vecs; i++) | |
| 377 sbitmap_ones (bmap[i]); | |
| 378 } | |
| 379 | |
| 380 /* Set DST to be A union (B - C). | |
| 381 DST = A | (B & ~C). | |
| 382 Returns true if any change is made. */ | |
| 383 | |
| 384 bool | |
| 385 sbitmap_union_of_diff_cg (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c) | |
| 386 { | |
| 387 unsigned int i, n = dst->size; | |
| 388 sbitmap_ptr dstp = dst->elms; | |
| 389 const_sbitmap_ptr ap = a->elms; | |
| 390 const_sbitmap_ptr bp = b->elms; | |
| 391 const_sbitmap_ptr cp = c->elms; | |
| 392 SBITMAP_ELT_TYPE changed = 0; | |
| 393 | |
| 394 gcc_assert (!dst->popcount); | |
|
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395 |
| 0 | 396 for (i = 0; i < n; i++) |
| 397 { | |
| 398 const SBITMAP_ELT_TYPE tmp = *ap++ | (*bp++ & ~*cp++); | |
| 399 changed |= *dstp ^ tmp; | |
| 400 *dstp++ = tmp; | |
| 401 } | |
| 402 | |
| 403 return changed != 0; | |
| 404 } | |
| 405 | |
| 406 void | |
| 407 sbitmap_union_of_diff (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c) | |
| 408 { | |
| 409 unsigned int i, n = dst->size; | |
| 410 sbitmap_ptr dstp = dst->elms; | |
| 411 const_sbitmap_ptr ap = a->elms; | |
| 412 const_sbitmap_ptr bp = b->elms; | |
| 413 const_sbitmap_ptr cp = c->elms; | |
| 414 | |
| 415 gcc_assert (!dst->popcount && !a->popcount | |
| 416 && !b->popcount && !c->popcount); | |
| 417 | |
| 418 for (i = 0; i < n; i++) | |
| 419 *dstp++ = *ap++ | (*bp++ & ~*cp++); | |
| 420 } | |
| 421 | |
| 422 /* Set bitmap DST to the bitwise negation of the bitmap SRC. */ | |
| 423 | |
| 424 void | |
| 425 sbitmap_not (sbitmap dst, const_sbitmap src) | |
| 426 { | |
| 427 unsigned int i, n = dst->size; | |
| 428 sbitmap_ptr dstp = dst->elms; | |
| 429 const_sbitmap_ptr srcp = src->elms; | |
| 430 unsigned int last_bit; | |
| 431 | |
|
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432 gcc_assert (!dst->popcount); |
| 0 | 433 |
| 434 for (i = 0; i < n; i++) | |
| 435 *dstp++ = ~*srcp++; | |
| 436 | |
| 437 /* Zero all bits past n_bits, by ANDing dst with sbitmap_ones. */ | |
| 438 last_bit = src->n_bits % SBITMAP_ELT_BITS; | |
| 439 if (last_bit) | |
| 440 dst->elms[n-1] = dst->elms[n-1] | |
| 441 & ((SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit)); | |
| 442 } | |
| 443 | |
| 444 /* Set the bits in DST to be the difference between the bits | |
| 445 in A and the bits in B. i.e. dst = a & (~b). */ | |
| 446 | |
| 447 void | |
| 448 sbitmap_difference (sbitmap dst, const_sbitmap a, const_sbitmap b) | |
| 449 { | |
| 450 unsigned int i, dst_size = dst->size; | |
| 451 unsigned int min_size = dst->size; | |
| 452 sbitmap_ptr dstp = dst->elms; | |
| 453 const_sbitmap_ptr ap = a->elms; | |
| 454 const_sbitmap_ptr bp = b->elms; | |
| 455 | |
| 456 gcc_assert (!dst->popcount); | |
| 457 | |
| 458 /* A should be at least as large as DEST, to have a defined source. */ | |
| 459 gcc_assert (a->size >= dst_size); | |
| 460 /* If minuend is smaller, we simply pretend it to be zero bits, i.e. | |
| 461 only copy the subtrahend into dest. */ | |
| 462 if (b->size < min_size) | |
| 463 min_size = b->size; | |
| 464 for (i = 0; i < min_size; i++) | |
| 465 *dstp++ = *ap++ & (~*bp++); | |
| 466 /* Now fill the rest of dest from A, if B was too short. | |
| 467 This makes sense only when destination and A differ. */ | |
| 468 if (dst != a && i != dst_size) | |
| 469 for (; i < dst_size; i++) | |
| 470 *dstp++ = *ap++; | |
| 471 } | |
| 472 | |
| 473 /* Return true if there are any bits set in A are also set in B. | |
| 474 Return false otherwise. */ | |
| 475 | |
| 476 bool | |
| 477 sbitmap_any_common_bits (const_sbitmap a, const_sbitmap b) | |
| 478 { | |
| 479 const_sbitmap_ptr ap = a->elms; | |
| 480 const_sbitmap_ptr bp = b->elms; | |
| 481 unsigned int i, n; | |
| 482 | |
| 483 n = MIN (a->size, b->size); | |
| 484 for (i = 0; i < n; i++) | |
| 485 if ((*ap++ & *bp++) != 0) | |
| 486 return true; | |
| 487 | |
| 488 return false; | |
| 489 } | |
| 490 | |
| 491 /* Set DST to be (A and B). | |
| 492 Return nonzero if any change is made. */ | |
| 493 | |
| 494 bool | |
| 495 sbitmap_a_and_b_cg (sbitmap dst, const_sbitmap a, const_sbitmap b) | |
| 496 { | |
| 497 unsigned int i, n = dst->size; | |
| 498 sbitmap_ptr dstp = dst->elms; | |
| 499 const_sbitmap_ptr ap = a->elms; | |
| 500 const_sbitmap_ptr bp = b->elms; | |
| 501 SBITMAP_ELT_TYPE changed = 0; | |
| 502 | |
| 503 gcc_assert (!dst->popcount); | |
| 504 | |
| 505 for (i = 0; i < n; i++) | |
| 506 { | |
| 507 const SBITMAP_ELT_TYPE tmp = *ap++ & *bp++; | |
| 508 changed |= *dstp ^ tmp; | |
| 509 *dstp++ = tmp; | |
| 510 } | |
| 511 | |
| 512 return changed != 0; | |
| 513 } | |
| 514 | |
| 515 void | |
| 516 sbitmap_a_and_b (sbitmap dst, const_sbitmap a, const_sbitmap b) | |
| 517 { | |
| 518 unsigned int i, n = dst->size; | |
| 519 sbitmap_ptr dstp = dst->elms; | |
| 520 const_sbitmap_ptr ap = a->elms; | |
| 521 const_sbitmap_ptr bp = b->elms; | |
| 522 bool has_popcount = dst->popcount != NULL; | |
| 523 unsigned char *popcountp = dst->popcount; | |
| 524 | |
| 525 for (i = 0; i < n; i++) | |
| 526 { | |
| 527 const SBITMAP_ELT_TYPE tmp = *ap++ & *bp++; | |
| 528 if (has_popcount) | |
| 529 { | |
| 530 bool wordchanged = (*dstp ^ tmp) != 0; | |
| 531 if (wordchanged) | |
| 532 *popcountp = do_popcount (tmp); | |
| 533 popcountp++; | |
|
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534 } |
| 0 | 535 *dstp++ = tmp; |
| 536 } | |
| 537 #ifdef BITMAP_DEBUGGING | |
| 538 if (has_popcount) | |
| 539 sbitmap_verify_popcount (dst); | |
| 540 #endif | |
| 541 } | |
| 542 | |
| 543 /* Set DST to be (A xor B)). | |
| 544 Return nonzero if any change is made. */ | |
| 545 | |
| 546 bool | |
| 547 sbitmap_a_xor_b_cg (sbitmap dst, const_sbitmap a, const_sbitmap b) | |
| 548 { | |
| 549 unsigned int i, n = dst->size; | |
| 550 sbitmap_ptr dstp = dst->elms; | |
| 551 const_sbitmap_ptr ap = a->elms; | |
| 552 const_sbitmap_ptr bp = b->elms; | |
| 553 SBITMAP_ELT_TYPE changed = 0; | |
|
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554 |
| 0 | 555 gcc_assert (!dst->popcount); |
| 556 | |
| 557 for (i = 0; i < n; i++) | |
| 558 { | |
| 559 const SBITMAP_ELT_TYPE tmp = *ap++ ^ *bp++; | |
| 560 changed |= *dstp ^ tmp; | |
| 561 *dstp++ = tmp; | |
| 562 } | |
| 563 | |
| 564 return changed != 0; | |
| 565 } | |
| 566 | |
| 567 void | |
| 568 sbitmap_a_xor_b (sbitmap dst, const_sbitmap a, const_sbitmap b) | |
| 569 { | |
| 570 unsigned int i, n = dst->size; | |
| 571 sbitmap_ptr dstp = dst->elms; | |
| 572 const_sbitmap_ptr ap = a->elms; | |
| 573 const_sbitmap_ptr bp = b->elms; | |
| 574 bool has_popcount = dst->popcount != NULL; | |
| 575 unsigned char *popcountp = dst->popcount; | |
| 576 | |
| 577 for (i = 0; i < n; i++) | |
| 578 { | |
| 579 const SBITMAP_ELT_TYPE tmp = *ap++ ^ *bp++; | |
| 580 if (has_popcount) | |
| 581 { | |
| 582 bool wordchanged = (*dstp ^ tmp) != 0; | |
| 583 if (wordchanged) | |
| 584 *popcountp = do_popcount (tmp); | |
| 585 popcountp++; | |
|
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586 } |
| 0 | 587 *dstp++ = tmp; |
| 588 } | |
| 589 #ifdef BITMAP_DEBUGGING | |
| 590 if (has_popcount) | |
| 591 sbitmap_verify_popcount (dst); | |
| 592 #endif | |
| 593 } | |
| 594 | |
| 595 /* Set DST to be (A or B)). | |
| 596 Return nonzero if any change is made. */ | |
| 597 | |
| 598 bool | |
| 599 sbitmap_a_or_b_cg (sbitmap dst, const_sbitmap a, const_sbitmap b) | |
| 600 { | |
| 601 unsigned int i, n = dst->size; | |
| 602 sbitmap_ptr dstp = dst->elms; | |
| 603 const_sbitmap_ptr ap = a->elms; | |
| 604 const_sbitmap_ptr bp = b->elms; | |
| 605 SBITMAP_ELT_TYPE changed = 0; | |
| 606 | |
| 607 gcc_assert (!dst->popcount); | |
| 608 | |
| 609 for (i = 0; i < n; i++) | |
| 610 { | |
| 611 const SBITMAP_ELT_TYPE tmp = *ap++ | *bp++; | |
| 612 changed |= *dstp ^ tmp; | |
| 613 *dstp++ = tmp; | |
| 614 } | |
| 615 | |
| 616 return changed != 0; | |
| 617 } | |
| 618 | |
| 619 void | |
| 620 sbitmap_a_or_b (sbitmap dst, const_sbitmap a, const_sbitmap b) | |
| 621 { | |
| 622 unsigned int i, n = dst->size; | |
| 623 sbitmap_ptr dstp = dst->elms; | |
| 624 const_sbitmap_ptr ap = a->elms; | |
| 625 const_sbitmap_ptr bp = b->elms; | |
| 626 bool has_popcount = dst->popcount != NULL; | |
| 627 unsigned char *popcountp = dst->popcount; | |
| 628 | |
| 629 for (i = 0; i < n; i++) | |
| 630 { | |
| 631 const SBITMAP_ELT_TYPE tmp = *ap++ | *bp++; | |
| 632 if (has_popcount) | |
| 633 { | |
| 634 bool wordchanged = (*dstp ^ tmp) != 0; | |
| 635 if (wordchanged) | |
| 636 *popcountp = do_popcount (tmp); | |
| 637 popcountp++; | |
|
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638 } |
| 0 | 639 *dstp++ = tmp; |
| 640 } | |
| 641 #ifdef BITMAP_DEBUGGING | |
| 642 if (has_popcount) | |
| 643 sbitmap_verify_popcount (dst); | |
| 644 #endif | |
| 645 } | |
| 646 | |
| 647 /* Return nonzero if A is a subset of B. */ | |
| 648 | |
| 649 bool | |
| 650 sbitmap_a_subset_b_p (const_sbitmap a, const_sbitmap b) | |
| 651 { | |
| 652 unsigned int i, n = a->size; | |
| 653 const_sbitmap_ptr ap, bp; | |
| 654 | |
| 655 for (ap = a->elms, bp = b->elms, i = 0; i < n; i++, ap++, bp++) | |
| 656 if ((*ap | *bp) != *bp) | |
| 657 return false; | |
| 658 | |
| 659 return true; | |
| 660 } | |
| 661 | |
| 662 /* Set DST to be (A or (B and C)). | |
| 663 Return nonzero if any change is made. */ | |
| 664 | |
| 665 bool | |
| 666 sbitmap_a_or_b_and_c_cg (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c) | |
| 667 { | |
| 668 unsigned int i, n = dst->size; | |
| 669 sbitmap_ptr dstp = dst->elms; | |
| 670 const_sbitmap_ptr ap = a->elms; | |
| 671 const_sbitmap_ptr bp = b->elms; | |
| 672 const_sbitmap_ptr cp = c->elms; | |
| 673 SBITMAP_ELT_TYPE changed = 0; | |
| 674 | |
| 675 gcc_assert (!dst->popcount); | |
| 676 | |
| 677 for (i = 0; i < n; i++) | |
| 678 { | |
| 679 const SBITMAP_ELT_TYPE tmp = *ap++ | (*bp++ & *cp++); | |
| 680 changed |= *dstp ^ tmp; | |
| 681 *dstp++ = tmp; | |
| 682 } | |
| 683 | |
| 684 return changed != 0; | |
| 685 } | |
| 686 | |
| 687 void | |
| 688 sbitmap_a_or_b_and_c (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c) | |
| 689 { | |
| 690 unsigned int i, n = dst->size; | |
| 691 sbitmap_ptr dstp = dst->elms; | |
| 692 const_sbitmap_ptr ap = a->elms; | |
| 693 const_sbitmap_ptr bp = b->elms; | |
| 694 const_sbitmap_ptr cp = c->elms; | |
| 695 | |
| 696 gcc_assert (!dst->popcount); | |
| 697 | |
| 698 for (i = 0; i < n; i++) | |
| 699 *dstp++ = *ap++ | (*bp++ & *cp++); | |
| 700 } | |
| 701 | |
| 702 /* Set DST to be (A and (B or C)). | |
| 703 Return nonzero if any change is made. */ | |
| 704 | |
| 705 bool | |
| 706 sbitmap_a_and_b_or_c_cg (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c) | |
| 707 { | |
| 708 unsigned int i, n = dst->size; | |
| 709 sbitmap_ptr dstp = dst->elms; | |
| 710 const_sbitmap_ptr ap = a->elms; | |
| 711 const_sbitmap_ptr bp = b->elms; | |
| 712 const_sbitmap_ptr cp = c->elms; | |
| 713 SBITMAP_ELT_TYPE changed = 0; | |
| 714 | |
| 715 gcc_assert (!dst->popcount); | |
| 716 | |
| 717 for (i = 0; i < n; i++) | |
| 718 { | |
| 719 const SBITMAP_ELT_TYPE tmp = *ap++ & (*bp++ | *cp++); | |
| 720 changed |= *dstp ^ tmp; | |
| 721 *dstp++ = tmp; | |
| 722 } | |
| 723 | |
| 724 return changed != 0; | |
| 725 } | |
| 726 | |
| 727 void | |
| 728 sbitmap_a_and_b_or_c (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c) | |
| 729 { | |
| 730 unsigned int i, n = dst->size; | |
| 731 sbitmap_ptr dstp = dst->elms; | |
| 732 const_sbitmap_ptr ap = a->elms; | |
| 733 const_sbitmap_ptr bp = b->elms; | |
| 734 const_sbitmap_ptr cp = c->elms; | |
| 735 | |
| 736 for (i = 0; i < n; i++) | |
| 737 *dstp++ = *ap++ & (*bp++ | *cp++); | |
| 738 } | |
| 739 | |
| 740 #ifdef IN_GCC | |
| 741 /* Set the bitmap DST to the intersection of SRC of successors of | |
| 742 block number BB, using the new flow graph structures. */ | |
| 743 | |
| 744 void | |
| 745 sbitmap_intersection_of_succs (sbitmap dst, sbitmap *src, int bb) | |
| 746 { | |
| 747 basic_block b = BASIC_BLOCK (bb); | |
| 748 unsigned int set_size = dst->size; | |
| 749 edge e; | |
| 750 unsigned ix; | |
| 751 | |
| 752 gcc_assert (!dst->popcount); | |
| 753 | |
| 754 for (e = NULL, ix = 0; ix < EDGE_COUNT (b->succs); ix++) | |
| 755 { | |
| 756 e = EDGE_SUCC (b, ix); | |
| 757 if (e->dest == EXIT_BLOCK_PTR) | |
| 758 continue; | |
|
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759 |
| 0 | 760 sbitmap_copy (dst, src[e->dest->index]); |
| 761 break; | |
| 762 } | |
| 763 | |
| 764 if (e == 0) | |
| 765 sbitmap_ones (dst); | |
| 766 else | |
| 767 for (++ix; ix < EDGE_COUNT (b->succs); ix++) | |
| 768 { | |
| 769 unsigned int i; | |
| 770 sbitmap_ptr p, r; | |
| 771 | |
| 772 e = EDGE_SUCC (b, ix); | |
| 773 if (e->dest == EXIT_BLOCK_PTR) | |
| 774 continue; | |
| 775 | |
| 776 p = src[e->dest->index]->elms; | |
| 777 r = dst->elms; | |
| 778 for (i = 0; i < set_size; i++) | |
| 779 *r++ &= *p++; | |
| 780 } | |
| 781 } | |
| 782 | |
| 783 /* Set the bitmap DST to the intersection of SRC of predecessors of | |
| 784 block number BB, using the new flow graph structures. */ | |
| 785 | |
| 786 void | |
| 787 sbitmap_intersection_of_preds (sbitmap dst, sbitmap *src, int bb) | |
| 788 { | |
| 789 basic_block b = BASIC_BLOCK (bb); | |
| 790 unsigned int set_size = dst->size; | |
| 791 edge e; | |
| 792 unsigned ix; | |
| 793 | |
| 794 gcc_assert (!dst->popcount); | |
| 795 | |
| 796 for (e = NULL, ix = 0; ix < EDGE_COUNT (b->preds); ix++) | |
| 797 { | |
| 798 e = EDGE_PRED (b, ix); | |
| 799 if (e->src == ENTRY_BLOCK_PTR) | |
| 800 continue; | |
| 801 | |
| 802 sbitmap_copy (dst, src[e->src->index]); | |
| 803 break; | |
| 804 } | |
| 805 | |
| 806 if (e == 0) | |
| 807 sbitmap_ones (dst); | |
| 808 else | |
| 809 for (++ix; ix < EDGE_COUNT (b->preds); ix++) | |
| 810 { | |
| 811 unsigned int i; | |
| 812 sbitmap_ptr p, r; | |
| 813 | |
| 814 e = EDGE_PRED (b, ix); | |
| 815 if (e->src == ENTRY_BLOCK_PTR) | |
| 816 continue; | |
| 817 | |
| 818 p = src[e->src->index]->elms; | |
| 819 r = dst->elms; | |
| 820 for (i = 0; i < set_size; i++) | |
| 821 *r++ &= *p++; | |
| 822 } | |
| 823 } | |
| 824 | |
| 825 /* Set the bitmap DST to the union of SRC of successors of | |
| 826 block number BB, using the new flow graph structures. */ | |
| 827 | |
| 828 void | |
| 829 sbitmap_union_of_succs (sbitmap dst, sbitmap *src, int bb) | |
| 830 { | |
| 831 basic_block b = BASIC_BLOCK (bb); | |
| 832 unsigned int set_size = dst->size; | |
| 833 edge e; | |
| 834 unsigned ix; | |
| 835 | |
| 836 gcc_assert (!dst->popcount); | |
| 837 | |
| 838 for (ix = 0; ix < EDGE_COUNT (b->succs); ix++) | |
| 839 { | |
| 840 e = EDGE_SUCC (b, ix); | |
| 841 if (e->dest == EXIT_BLOCK_PTR) | |
| 842 continue; | |
| 843 | |
| 844 sbitmap_copy (dst, src[e->dest->index]); | |
| 845 break; | |
| 846 } | |
| 847 | |
| 848 if (ix == EDGE_COUNT (b->succs)) | |
| 849 sbitmap_zero (dst); | |
| 850 else | |
| 851 for (ix++; ix < EDGE_COUNT (b->succs); ix++) | |
| 852 { | |
| 853 unsigned int i; | |
| 854 sbitmap_ptr p, r; | |
| 855 | |
| 856 e = EDGE_SUCC (b, ix); | |
| 857 if (e->dest == EXIT_BLOCK_PTR) | |
| 858 continue; | |
| 859 | |
| 860 p = src[e->dest->index]->elms; | |
| 861 r = dst->elms; | |
| 862 for (i = 0; i < set_size; i++) | |
| 863 *r++ |= *p++; | |
| 864 } | |
| 865 } | |
| 866 | |
| 867 /* Set the bitmap DST to the union of SRC of predecessors of | |
| 868 block number BB, using the new flow graph structures. */ | |
| 869 | |
| 870 void | |
| 871 sbitmap_union_of_preds (sbitmap dst, sbitmap *src, int bb) | |
| 872 { | |
| 873 basic_block b = BASIC_BLOCK (bb); | |
| 874 unsigned int set_size = dst->size; | |
| 875 edge e; | |
| 876 unsigned ix; | |
| 877 | |
| 878 gcc_assert (!dst->popcount); | |
| 879 | |
| 880 for (ix = 0; ix < EDGE_COUNT (b->preds); ix++) | |
| 881 { | |
| 882 e = EDGE_PRED (b, ix); | |
| 883 if (e->src== ENTRY_BLOCK_PTR) | |
| 884 continue; | |
| 885 | |
| 886 sbitmap_copy (dst, src[e->src->index]); | |
| 887 break; | |
| 888 } | |
| 889 | |
| 890 if (ix == EDGE_COUNT (b->preds)) | |
| 891 sbitmap_zero (dst); | |
| 892 else | |
| 893 for (ix++; ix < EDGE_COUNT (b->preds); ix++) | |
| 894 { | |
| 895 unsigned int i; | |
| 896 sbitmap_ptr p, r; | |
| 897 | |
| 898 e = EDGE_PRED (b, ix); | |
| 899 if (e->src == ENTRY_BLOCK_PTR) | |
| 900 continue; | |
| 901 | |
| 902 p = src[e->src->index]->elms; | |
| 903 r = dst->elms; | |
| 904 for (i = 0; i < set_size; i++) | |
| 905 *r++ |= *p++; | |
| 906 } | |
| 907 } | |
| 908 #endif | |
| 909 | |
| 910 /* Return number of first bit set in the bitmap, -1 if none. */ | |
| 911 | |
| 912 int | |
| 913 sbitmap_first_set_bit (const_sbitmap bmap) | |
| 914 { | |
| 915 unsigned int n = 0; | |
| 916 sbitmap_iterator sbi; | |
| 917 | |
| 918 EXECUTE_IF_SET_IN_SBITMAP (bmap, 0, n, sbi) | |
| 919 return n; | |
| 920 return -1; | |
| 921 } | |
| 922 | |
| 923 /* Return number of last bit set in the bitmap, -1 if none. */ | |
| 924 | |
| 925 int | |
| 926 sbitmap_last_set_bit (const_sbitmap bmap) | |
| 927 { | |
| 928 int i; | |
| 929 const SBITMAP_ELT_TYPE *const ptr = bmap->elms; | |
| 930 | |
| 931 for (i = bmap->size - 1; i >= 0; i--) | |
| 932 { | |
| 933 const SBITMAP_ELT_TYPE word = ptr[i]; | |
| 934 | |
| 935 if (word != 0) | |
| 936 { | |
| 937 unsigned int index = (i + 1) * SBITMAP_ELT_BITS - 1; | |
| 938 SBITMAP_ELT_TYPE mask | |
| 939 = (SBITMAP_ELT_TYPE) 1 << (SBITMAP_ELT_BITS - 1); | |
| 940 | |
| 941 while (1) | |
| 942 { | |
| 943 if ((word & mask) != 0) | |
| 944 return index; | |
| 945 | |
| 946 mask >>= 1; | |
| 947 index--; | |
| 948 } | |
| 949 } | |
| 950 } | |
| 951 | |
| 952 return -1; | |
| 953 } | |
| 954 | |
| 955 void | |
| 956 dump_sbitmap (FILE *file, const_sbitmap bmap) | |
| 957 { | |
| 958 unsigned int i, n, j; | |
| 959 unsigned int set_size = bmap->size; | |
| 960 unsigned int total_bits = bmap->n_bits; | |
| 961 | |
| 962 fprintf (file, " "); | |
| 963 for (i = n = 0; i < set_size && n < total_bits; i++) | |
| 964 for (j = 0; j < SBITMAP_ELT_BITS && n < total_bits; j++, n++) | |
| 965 { | |
| 966 if (n != 0 && n % 10 == 0) | |
| 967 fprintf (file, " "); | |
| 968 | |
| 969 fprintf (file, "%d", | |
| 970 (bmap->elms[i] & ((SBITMAP_ELT_TYPE) 1 << j)) != 0); | |
| 971 } | |
| 972 | |
| 973 fprintf (file, "\n"); | |
| 974 } | |
| 975 | |
| 976 void | |
| 977 dump_sbitmap_file (FILE *file, const_sbitmap bmap) | |
| 978 { | |
| 979 unsigned int i, pos; | |
| 980 | |
| 981 fprintf (file, "n_bits = %d, set = {", bmap->n_bits); | |
| 982 | |
| 983 for (pos = 30, i = 0; i < bmap->n_bits; i++) | |
| 984 if (TEST_BIT (bmap, i)) | |
| 985 { | |
| 986 if (pos > 70) | |
| 987 { | |
| 988 fprintf (file, "\n "); | |
| 989 pos = 0; | |
| 990 } | |
| 991 | |
| 992 fprintf (file, "%d ", i); | |
| 993 pos += 2 + (i >= 10) + (i >= 100) + (i >= 1000); | |
| 994 } | |
| 995 | |
| 996 fprintf (file, "}\n"); | |
| 997 } | |
| 998 | |
| 999 void | |
| 1000 debug_sbitmap (const_sbitmap bmap) | |
| 1001 { | |
| 1002 dump_sbitmap_file (stderr, bmap); | |
| 1003 } | |
| 1004 | |
| 1005 void | |
| 1006 dump_sbitmap_vector (FILE *file, const char *title, const char *subtitle, | |
| 1007 sbitmap *bmaps, int n_maps) | |
| 1008 { | |
| 1009 int bb; | |
| 1010 | |
| 1011 fprintf (file, "%s\n", title); | |
| 1012 for (bb = 0; bb < n_maps; bb++) | |
| 1013 { | |
| 1014 fprintf (file, "%s %d\n", subtitle, bb); | |
| 1015 dump_sbitmap (file, bmaps[bb]); | |
| 1016 } | |
| 1017 | |
| 1018 fprintf (file, "\n"); | |
| 1019 } | |
| 1020 | |
| 1021 #if GCC_VERSION < 3400 | |
| 1022 /* Table of number of set bits in a character, indexed by value of char. */ | |
| 1023 static const unsigned char popcount_table[] = | |
| 1024 { | |
| 1025 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5, | |
| 1026 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6, | |
| 1027 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6, | |
| 1028 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7, | |
| 1029 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6, | |
| 1030 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7, | |
| 1031 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7, | |
| 1032 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8, | |
| 1033 }; | |
| 1034 | |
| 1035 /* Count the bits in an SBITMAP element A. */ | |
| 1036 | |
| 1037 static unsigned long | |
| 1038 sbitmap_elt_popcount (SBITMAP_ELT_TYPE a) | |
| 1039 { | |
| 1040 unsigned long ret = 0; | |
| 1041 unsigned i; | |
| 1042 | |
| 1043 if (a == 0) | |
| 1044 return 0; | |
| 1045 | |
| 1046 /* Just do this the table way for now */ | |
| 1047 for (i = 0; i < SBITMAP_ELT_BITS; i += 8) | |
| 1048 ret += popcount_table[(a >> i) & 0xff]; | |
| 1049 return ret; | |
| 1050 } | |
| 1051 #endif | |
| 1052 | |
| 1053 /* Count the number of bits in SBITMAP a, up to bit MAXBIT. */ | |
| 1054 | |
| 1055 unsigned long | |
| 1056 sbitmap_popcount (const_sbitmap a, unsigned long maxbit) | |
| 1057 { | |
| 1058 unsigned long count = 0; | |
| 1059 unsigned ix; | |
| 1060 unsigned int lastword; | |
| 1061 | |
| 1062 if (maxbit == 0) | |
| 1063 return 0; | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1064 |
| 0 | 1065 if (maxbit >= a->n_bits) |
| 1066 maxbit = a->n_bits; | |
| 1067 | |
| 1068 /* Count the bits in the full word. */ | |
| 1069 lastword = MIN (a->size, SBITMAP_SET_SIZE (maxbit + 1) - 1); | |
| 1070 for (ix = 0; ix < lastword; ix++) | |
| 1071 { | |
| 1072 if (a->popcount) | |
| 1073 { | |
| 1074 count += a->popcount[ix]; | |
| 1075 #ifdef BITMAP_DEBUGGING | |
| 1076 gcc_assert (a->popcount[ix] == do_popcount (a->elms[ix])); | |
| 1077 #endif | |
| 1078 } | |
| 1079 else | |
| 1080 count += do_popcount (a->elms[ix]); | |
| 1081 } | |
| 1082 | |
| 1083 /* Count the remaining bits. */ | |
| 1084 if (lastword < a->size) | |
| 1085 { | |
| 1086 unsigned int bitindex; | |
| 1087 SBITMAP_ELT_TYPE theword = a->elms[lastword]; | |
| 1088 | |
| 1089 bitindex = maxbit % SBITMAP_ELT_BITS; | |
| 1090 if (bitindex != 0) | |
| 1091 { | |
| 1092 theword &= (SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - bitindex); | |
| 1093 count += do_popcount (theword); | |
| 1094 } | |
| 1095 } | |
| 1096 return count; | |
| 1097 } | |
| 1098 |