You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include "bbitset.h"
+#include "ebitset.h"
#include "obstack.h"
#include <stdlib.h>
Bitsets are commonly empty so we need to ensure that this special
case is fast. A zero bitset is indicated when cdata is 0. This is
conservative since cdata may be non zero and the bitset may still
- be zero.
+ be zero.
The bitset cache can be disabled either by setting cindex to
- some large number or by setting csize to 0. Here
+ BITSET_WINDEX_MAX or by setting csize to 0. Here
we use the former approach since cindex needs to be updated whenever
- cdata is changed.
+ cdata is changed.
*/
/* Number of words to use for each element. */
-
-#ifndef EBITSET_ELT_WORDS
#define EBITSET_ELT_WORDS 2
-#endif
/* Number of bits stored in each element. */
#define EBITSET_ELT_BITS \
typedef ebitset_elt *ebitset_elts;
-/* Head of ebitset linked list. */
-typedef struct ebitset_struct
-{
- unsigned int size; /* Number of elements. */
- ebitset_elts *elts; /* Expanding array of pointers to elements. */
-}
-*ebitset;
-
/* Number of elements to initially allocate. */
#define EBITSET_GROW_SIZE 4
#endif
-struct bitset_struct
-{
- struct bbitset_struct b;
- struct ebitset_struct e;
-};
-
enum ebitset_find_mode
{ EBITSET_FIND, EBITSET_CREATE, EBITSET_SUBST };
static int ebitset_obstack_init = 0;
static ebitset_elt *ebitset_free_list; /* Free list of bitset elements. */
-static void ebitset_elts_grow PARAMS ((bitset, unsigned int));
-static ebitset_elt *ebitset_elt_alloc PARAMS ((void));
-static ebitset_elt *ebitset_elt_calloc PARAMS ((void));
-static void ebitset_elt_add PARAMS ((bitset, ebitset_elt *, unsigned int));
-static void ebitset_elt_remove PARAMS ((bitset, unsigned int));
-static void ebitset_elt_free PARAMS ((ebitset_elt *));
-static ebitset_elt *ebitset_elt_find PARAMS ((bitset, bitset_windex,
- enum ebitset_find_mode));
-static ebitset_elt *ebitset_elt_last PARAMS ((bitset));
-static int ebitset_elt_zero_p PARAMS ((ebitset_elt *));
-
-static int ebitset_weed PARAMS ((bitset));
-static void ebitset_zero PARAMS ((bitset));
-static int ebitset_equal_p PARAMS ((bitset, bitset));
-static void ebitset_copy PARAMS ((bitset, bitset));
-static int ebitset_copy_compare PARAMS ((bitset, bitset));
-static void ebitset_set PARAMS ((bitset, bitset_bindex));
-static void ebitset_reset PARAMS ((bitset, bitset_bindex));
-static int ebitset_test PARAMS ((bitset, bitset_bindex));
-static int ebitset_size PARAMS ((bitset));
-static int ebitset_op1 PARAMS ((bitset, enum bitset_ops));
-static int ebitset_op2 PARAMS ((bitset, bitset, enum bitset_ops));
-static int ebitset_op3 PARAMS ((bitset, bitset, bitset, enum bitset_ops));
-static int ebitset_list PARAMS ((bitset, bitset_bindex *, bitset_bindex,
- bitset_bindex *));
-static int ebitset_reverse_list
-PARAMS ((bitset, bitset_bindex *, bitset_bindex, bitset_bindex *));
-static void ebitset_free PARAMS ((bitset));
-
#define EBITSET_ELTS(BSET) ((BSET)->e.elts)
#define EBITSET_SIZE(BSET) ((BSET)->e.size)
#define EBITSET_WORDS(ELT) ((ELT)->u.words)
/* Disable bitset cache and mark BSET as being zero. */
-#define EBITSET_OP_ZERO_SET(BSET) ((BSET)->b.cindex = BITSET_INDEX_MAX, \
- (BSET)->b.cdata = 0)
+#define EBITSET_ZERO_SET(BSET) ((BSET)->b.cindex = BITSET_WINDEX_MAX, \
+ (BSET)->b.cdata = 0)
-#define EBITSET_CACHE_DISABLE(BSET) ((BSET)->b.cindex = BITSET_INDEX_MAX)
+#define EBITSET_CACHE_DISABLE(BSET) ((BSET)->b.cindex = BITSET_WINDEX_MAX)
/* Disable bitset cache and mark BSET as being possibly non-zero. */
#define EBITSET_NONZERO_SET(BSET) \
/* A conservative estimate of whether the bitset is zero.
This is non-zero only if we know for sure that the bitset is zero. */
-#define EBITSET_OP_ZERO_P(BSET) ((BSET)->b.cdata == 0)
+#define EBITSET_ZERO_P(BSET) ((BSET)->b.cdata == 0)
-/* Enable cache to point to element with table index EINDEX.
+/* Enable cache to point to element with table index EINDEX.
The element must exist. */
#define EBITSET_CACHE_SET(BSET, EINDEX) \
((BSET)->b.cindex = (EINDEX) * EBITSET_ELT_WORDS, \
/* Grow the expandable table for BSET by SIZE elements. */
static void
-ebitset_elts_grow (bset, size)
- bitset bset;
- unsigned int size;
+ebitset_elts_grow (bitset bset, bitset_windex size)
{
- unsigned int oldsize;
- unsigned int newsize;
+ bitset_windex oldsize;
+ bitset_windex newsize;
oldsize = EBITSET_SIZE (bset);
newsize = oldsize + size;
+ if (BITSET_SIZE_MAX / sizeof (ebitset_elt *) < newsize)
+ xalloc_die ();
+
EBITSET_ELTS (bset) = xrealloc (EBITSET_ELTS (bset),
newsize * sizeof (ebitset_elt *));
EBITSET_SIZE (bset) = newsize;
/* Allocate a ebitset element. The bits are not cleared. */
static inline ebitset_elt *
-ebitset_elt_alloc ()
+ebitset_elt_alloc (void)
{
ebitset_elt *elt;
}
else
{
- /* We can't use gcc_obstack_init to initialize the obstack since
- print-rtl.c now calls bitset functions, and bitset is linked
- into the gen* functions. */
if (!ebitset_obstack_init)
{
ebitset_obstack_init = 1;
}
-/* Allocate a ebitset element. The bits are not cleared. */
+/* Allocate a ebitset element. The bits are cleared. */
static inline ebitset_elt *
-ebitset_elt_calloc ()
+ebitset_elt_calloc (void)
{
ebitset_elt *elt;
static inline void
-ebitset_elt_free (elt)
- ebitset_elt *elt;
+ebitset_elt_free (ebitset_elt *elt)
{
EBITSET_NEXT (elt) = ebitset_free_list;
ebitset_free_list = elt;
/* Remove element with index EINDEX from bitset BSET. */
static inline void
-ebitset_elt_remove (bset, eindex)
- bitset bset;
- unsigned int eindex;
+ebitset_elt_remove (bitset bset, bitset_windex eindex)
{
ebitset_elts *elts;
ebitset_elt *elt;
/* Add ELT into elts at index EINDEX of bitset BSET. */
static inline void
-ebitset_elt_add (bset, elt, eindex)
- bitset bset;
- ebitset_elt *elt;
- unsigned int eindex;
+ebitset_elt_add (bitset bset, ebitset_elt *elt, bitset_windex eindex)
{
ebitset_elts *elts;
/* Return nonzero if all bits in an element are zero. */
static inline int
-ebitset_elt_zero_p (elt)
- ebitset_elt *elt;
+ebitset_elt_zero_p (ebitset_elt *elt)
{
int i;
static ebitset_elt *
-ebitset_elt_find (bset, index, mode)
- bitset bset;
- bitset_windex index;
- enum ebitset_find_mode mode;
+ebitset_elt_find (bitset bset, bitset_windex windex,
+ enum ebitset_find_mode mode)
{
ebitset_elt *elt;
bitset_windex size;
- unsigned int eindex;
+ bitset_windex eindex;
ebitset_elts *elts;
- eindex = index / EBITSET_ELT_WORDS;
+ eindex = windex / EBITSET_ELT_WORDS;
elts = EBITSET_ELTS (bset);
size = EBITSET_SIZE (bset);
if (eindex < size)
{
- ebitset_elt *elt;
-
if ((elt = elts[eindex]))
{
if (EBITSET_WORDS (elt) == bset->b.cdata)
case EBITSET_CREATE:
if (eindex >= size)
{
- unsigned int extra;
+ bitset_windex extra;
extra = eindex - size + 1;
static inline ebitset_elt *
-ebitset_elt_last (bset)
- bitset bset;
+ebitset_elt_last (bitset bset)
{
ebitset_elts *elts;
/* Weed out the zero elements from the elts. */
-static inline int
-ebitset_weed (bset)
- bitset bset;
+static inline bitset_windex
+ebitset_weed (bitset bset)
{
ebitset_elts *elts;
bitset_windex j;
- int count;
+ bitset_windex count;
- if (EBITSET_OP_ZERO_P (bset))
+ if (EBITSET_ZERO_P (bset))
return 0;
elts = EBITSET_ELTS (bset);
count = j - count;
if (!count)
{
- /* All the bits are zero. We could shrink the elts.
+ /* All the bits are zero. We could shrink the elts.
For now just mark BSET as known to be zero. */
- EBITSET_OP_ZERO_SET (bset);
+ EBITSET_ZERO_SET (bset);
}
else
EBITSET_NONZERO_SET (bset);
/* Set all bits in the bitset to zero. */
static inline void
-ebitset_zero (bset)
- bitset bset;
+ebitset_zero (bitset bset)
{
ebitset_elts *elts;
bitset_windex j;
- if (EBITSET_OP_ZERO_P (bset))
+ if (EBITSET_ZERO_P (bset))
return;
elts = EBITSET_ELTS (bset);
ebitset_elt_remove (bset, j);
}
- /* All the bits are zero. We could shrink the elts.
+ /* All the bits are zero. We could shrink the elts.
For now just mark BSET as known to be zero. */
- EBITSET_OP_ZERO_SET (bset);
+ EBITSET_ZERO_SET (bset);
}
static inline int
-ebitset_equal_p (dst, src)
- bitset dst;
- bitset src;
+ebitset_equal_p (bitset dst, bitset src)
{
ebitset_elts *selts;
ebitset_elts *delts;
/* Copy bits from bitset SRC to bitset DST. */
static inline void
-ebitset_copy (dst, src)
- bitset dst;
- bitset src;
+ebitset_copy_ (bitset dst, bitset src)
{
ebitset_elts *selts;
ebitset_elts *delts;
/* Copy bits from bitset SRC to bitset DST. Return non-zero if
bitsets different. */
static inline int
-ebitset_copy_compare (dst, src)
- bitset dst;
- bitset src;
+ebitset_copy_cmp (bitset dst, bitset src)
{
if (src == dst)
return 0;
- if (EBITSET_OP_ZERO_P (dst))
+ if (EBITSET_ZERO_P (dst))
{
- ebitset_copy (dst, src);
- return !EBITSET_OP_ZERO_P (src);
+ ebitset_copy_ (dst, src);
+ return !EBITSET_ZERO_P (src);
}
if (ebitset_equal_p (dst, src))
return 0;
- ebitset_copy (dst, src);
+ ebitset_copy_ (dst, src);
return 1;
}
/* Return size in bits of bitset SRC. */
-static int
-ebitset_size (src)
- bitset src;
+static bitset_bindex
+ebitset_size (bitset src)
{
/* Return current size of bitset in bits. */
return EBITSET_SIZE (src) * EBITSET_ELT_BITS;
/* Set bit BITNO in bitset DST. */
static void
-ebitset_set (dst, bitno)
- bitset dst;
- bitset_bindex bitno;
+ebitset_set (bitset dst, bitset_bindex bitno)
{
- bitset_windex index = bitno / BITSET_WORD_BITS;
+ bitset_windex windex = bitno / BITSET_WORD_BITS;
- ebitset_elt_find (dst, index, EBITSET_CREATE);
+ ebitset_elt_find (dst, windex, EBITSET_CREATE);
- dst->b.cdata[index - dst->b.cindex] |= (1 << (bitno % BITSET_WORD_BITS));
+ dst->b.cdata[windex - dst->b.cindex] |=
+ (bitset_word) 1 << (bitno % BITSET_WORD_BITS);
}
/* Reset bit BITNO in bitset DST. */
static void
-ebitset_reset (dst, bitno)
- bitset dst;
- bitset_bindex bitno;
+ebitset_reset (bitset dst, bitset_bindex bitno)
{
- bitset_windex index = bitno / BITSET_WORD_BITS;
+ bitset_windex windex = bitno / BITSET_WORD_BITS;
- if (!ebitset_elt_find (dst, index, EBITSET_FIND))
+ if (!ebitset_elt_find (dst, windex, EBITSET_FIND))
return;
- dst->b.cdata[index - dst->b.cindex] &= ~(1 << (bitno % BITSET_WORD_BITS));
+ dst->b.cdata[windex - dst->b.cindex] &=
+ ~((bitset_word) 1 << (bitno % BITSET_WORD_BITS));
- /* If all the data is zero, perhaps we should remove it now...
- However, there could be a good chance that the element will be needed
+ /* If all the data is zero, perhaps we should remove it now...
+ However, there is a good chance that the element will be needed
again soon. */
}
/* Test bit BITNO in bitset SRC. */
static int
-ebitset_test (src, bitno)
- bitset src;
- bitset_bindex bitno;
+ebitset_test (bitset src, bitset_bindex bitno)
{
- bitset_windex index = bitno / BITSET_WORD_BITS;
+ bitset_windex windex = bitno / BITSET_WORD_BITS;
- if (!ebitset_elt_find (src, index, EBITSET_FIND))
+ if (!ebitset_elt_find (src, windex, EBITSET_FIND))
return 0;
return (src->b.
- cdata[index - src->b.cindex] >> (bitno % BITSET_WORD_BITS)) & 1;
+ cdata[windex - src->b.cindex] >> (bitno % BITSET_WORD_BITS)) & 1;
}
static void
-ebitset_free (bset)
- bitset bset;
+ebitset_free (bitset bset)
{
ebitset_zero (bset);
free (EBITSET_ELTS (bset));
/* Find list of up to NUM bits set in BSET starting from and including
*NEXT and store in array LIST. Return with actual number of bits
found and with *NEXT indicating where search stopped. */
-static int
-ebitset_reverse_list (bset, list, num, next)
- bitset bset;
- bitset_bindex *list;
- bitset_bindex num;
- bitset_bindex *next;
+static bitset_bindex
+ebitset_list_reverse (bitset bset, bitset_bindex *list,
+ bitset_bindex num, bitset_bindex *next)
{
bitset_bindex n_bits;
bitset_bindex bitno;
bitset_bindex rbitno;
- unsigned int bitcnt;
- bitset_bindex bitoff;
- bitset_windex index;
- unsigned int eindex;
+ unsigned int bcount;
+ bitset_bindex boffset;
bitset_windex windex;
+ bitset_windex eindex;
+ bitset_windex woffset;
bitset_bindex count;
bitset_windex size;
- bitset_word word;
ebitset_elts *elts;
- if (EBITSET_OP_ZERO_P (bset))
+ if (EBITSET_ZERO_P (bset))
return 0;
size = EBITSET_SIZE (bset);
bitno = n_bits - (rbitno + 1);
- index = bitno / BITSET_WORD_BITS;
+ windex = bitno / BITSET_WORD_BITS;
eindex = bitno / EBITSET_ELT_BITS;
- windex = index - eindex * EBITSET_ELT_WORDS;
+ woffset = windex - eindex * EBITSET_ELT_WORDS;
/* If num is 1, we could speed things up with a binary search
of the word of interest. */
count = 0;
- bitcnt = bitno % BITSET_WORD_BITS;
- bitoff = index * BITSET_WORD_BITS;
+ bcount = bitno % BITSET_WORD_BITS;
+ boffset = windex * BITSET_WORD_BITS;
- for (; eindex != ~0U; eindex--)
+ do
{
ebitset_elt *elt;
bitset_word *srcp;
elt = elts[eindex];
- if (!elt)
- continue;
-
- srcp = EBITSET_WORDS (elt);
-
- for (; windex != ~0U; windex--, bitoff -= BITSET_WORD_BITS,
- bitcnt = BITSET_WORD_BITS - 1)
+ if (elt)
{
- word = srcp[windex] << (BITSET_WORD_BITS - 1 - bitcnt);
+ srcp = EBITSET_WORDS (elt);
- for (; word; bitcnt--)
+ do
{
- if (word & BITSET_MSB)
+ bitset_word word;
+
+ word = srcp[woffset] << (BITSET_WORD_BITS - 1 - bcount);
+
+ for (; word; bcount--)
{
- list[count++] = bitoff + bitcnt;
- if (count >= num)
+ if (word & BITSET_MSB)
{
- *next = n_bits - (bitoff + bitcnt);
- return count;
+ list[count++] = boffset + bcount;
+ if (count >= num)
+ {
+ *next = n_bits - (boffset + bcount);
+ return count;
+ }
}
+ word <<= 1;
}
- word <<= 1;
+ boffset -= BITSET_WORD_BITS;
+ bcount = BITSET_WORD_BITS - 1;
}
+ while (woffset--);
}
- windex = EBITSET_ELT_WORDS;
+ woffset = EBITSET_ELT_WORDS - 1;
+ boffset = eindex * EBITSET_ELT_BITS - BITSET_WORD_BITS;
}
+ while (eindex--);
- *next = n_bits - (bitoff + 1);
+ *next = n_bits - (boffset + 1);
return count;
}
/* Find list of up to NUM bits set in BSET starting from and including
*NEXT and store in array LIST. Return with actual number of bits
found and with *NEXT indicating where search stopped. */
-static int
-ebitset_list (bset, list, num, next)
- bitset bset;
- bitset_bindex *list;
- bitset_bindex num;
- bitset_bindex *next;
+static bitset_bindex
+ebitset_list (bitset bset, bitset_bindex *list,
+ bitset_bindex num, bitset_bindex *next)
{
bitset_bindex bitno;
- bitset_windex index;
- unsigned int eindex;
+ bitset_windex windex;
+ bitset_windex eindex;
bitset_bindex count;
bitset_windex size;
ebitset_elt *elt;
bitset_word word;
ebitset_elts *elts;
- if (EBITSET_OP_ZERO_P (bset))
+ if (EBITSET_ZERO_P (bset))
return 0;
bitno = *next;
elt = elts[eindex];
if (elt)
{
- bitset_windex windex;
+ bitset_windex woffset;
bitset_word *srcp = EBITSET_WORDS (elt);
- index = bitno / BITSET_WORD_BITS;
- windex = eindex / EBITSET_ELT_WORDS;
+ windex = bitno / BITSET_WORD_BITS;
+ woffset = eindex * EBITSET_ELT_WORDS;
- for (; (index - windex) < EBITSET_ELT_WORDS; index++)
+ for (; (windex - woffset) < EBITSET_ELT_WORDS; windex++)
{
- word = srcp[index - windex] >> (bitno % BITSET_WORD_BITS);
+ word = srcp[windex - woffset] >> (bitno % BITSET_WORD_BITS);
for (; word; bitno++)
{
}
word >>= 1;
}
- bitno = (index + 1) * BITSET_WORD_BITS;
+ bitno = (windex + 1) * BITSET_WORD_BITS;
}
}
for (; eindex < size; eindex++)
{
int i;
- ebitset_elt *elt;
bitset_word *srcp;
elt = elts[eindex];
continue;
srcp = EBITSET_WORDS (elt);
- index = eindex * EBITSET_ELT_WORDS;
+ windex = eindex * EBITSET_ELT_WORDS;
if ((count + EBITSET_ELT_BITS) < num)
{
/* The coast is clear, plant boot! */
- for (i = 0; i < EBITSET_ELT_WORDS; i++, index++)
+ for (i = 0; i < EBITSET_ELT_WORDS; i++, windex++)
{
- bitno = index * BITSET_WORD_BITS;
+ bitno = windex * BITSET_WORD_BITS;
word = srcp[i];
if (word)
/* Tread more carefully since we need to check
if array overflows. */
- for (i = 0; i < EBITSET_ELT_WORDS; i++, index++)
+ for (i = 0; i < EBITSET_ELT_WORDS; i++, windex++)
{
- bitno = index * BITSET_WORD_BITS;
+ bitno = windex * BITSET_WORD_BITS;
for (word = srcp[i]; word; bitno++)
{
}
-static int
-ebitset_op1 (dst, op)
- bitset dst;
- enum bitset_ops op;
+static void
+ebitset_ones (bitset dst)
{
bitset_windex j;
ebitset_elt *elt;
- switch (op)
+
+ for (j = 0; j < EBITSET_SIZE (dst); j++)
{
- case BITSET_OP_ZERO:
- ebitset_zero (dst);
- return 1;
+ /* Create new elements if they cannot be found. Perhaps
+ we should just add pointers to a ones element. */
+ elt =
+ ebitset_elt_find (dst, j * EBITSET_ELT_WORDS, EBITSET_CREATE);
+ memset (EBITSET_WORDS (elt), -1, sizeof (EBITSET_WORDS (elt)));
+ }
+ EBITSET_NONZERO_SET (dst);
+}
- case BITSET_OP_ONES:
- for (j = 0; j < EBITSET_SIZE (dst); j++)
- {
- /* Create new elements if they cannot be found. Perhaps
- we should just add pointers to a ones element. */
- elt =
- ebitset_elt_find (dst, j * EBITSET_ELT_WORDS, EBITSET_CREATE);
- memset (EBITSET_WORDS (elt), ~0, sizeof (EBITSET_WORDS (elt)));
- }
- break;
- case BITSET_OP_EMPTY_P:
- return !ebitset_weed (dst);
+static int
+ebitset_empty_p (bitset dst)
+{
+ return !ebitset_weed (dst);
+}
- default:
- abort ();
- }
+static void
+ebitset_not (bitset dst, bitset src)
+{
+ unsigned int i;
+ ebitset_elt *selt;
+ ebitset_elt *delt;
+ bitset_windex j;
+
+ for (j = 0; j < EBITSET_SIZE (src); j++)
+ {
+ /* Create new elements for dst if they cannot be found
+ or substitute zero elements if src elements not found. */
+ selt =
+ ebitset_elt_find (dst, j * EBITSET_ELT_WORDS, EBITSET_SUBST);
+ delt =
+ ebitset_elt_find (dst, j * EBITSET_ELT_WORDS, EBITSET_CREATE);
+
+ for (i = 0; i < EBITSET_ELT_WORDS; i++)
+ EBITSET_WORDS (delt)[i] = ~EBITSET_WORDS (selt)[i];
+ }
EBITSET_NONZERO_SET (dst);
- return 1;
}
+/* Return 1 if DST == DST | SRC. */
static int
-ebitset_op2 (dst, src, op)
- bitset dst;
- bitset src;
- enum bitset_ops op;
+ebitset_subset_p (bitset dst, bitset src)
{
- ebitset_elt *selt;
- ebitset_elt *delt;
- unsigned int i;
bitset_windex j;
+ ebitset_elts *selts;
+ ebitset_elts *delts;
+ bitset_windex ssize;
+ bitset_windex dsize;
- switch (op)
+ selts = EBITSET_ELTS (src);
+ delts = EBITSET_ELTS (dst);
+
+ ssize = EBITSET_SIZE (src);
+ dsize = EBITSET_SIZE (dst);
+
+ for (j = 0; j < ssize; j++)
{
- case BITSET_OP_COPY:
- ebitset_copy (dst, src);
- break;
+ unsigned int i;
+ ebitset_elt *selt;
+ ebitset_elt *delt;
- case BITSET_OP_NOT:
- for (j = 0; j < EBITSET_SIZE (src); j++)
- {
- /* Create new elements for dst if they cannot be found
- or substitute zero elements if src elements not found. */
- selt =
- ebitset_elt_find (dst, j * EBITSET_ELT_WORDS, EBITSET_SUBST);
- delt =
- ebitset_elt_find (dst, j * EBITSET_ELT_WORDS, EBITSET_CREATE);
+ selt = j < ssize ? selts[j] : 0;
+ delt = j < dsize ? delts[j] : 0;
- for (i = 0; i < EBITSET_ELT_WORDS; i++)
- EBITSET_WORDS (delt)[i] = ~EBITSET_WORDS (selt)[i];
- }
- break;
-
- /* Return 1 if DST == SRC. */
- case BITSET_OP_EQUAL_P:
- return ebitset_equal_p (dst, src);
-
- /* Return 1 if DST == DST | SRC. */
- case BITSET_OP_SUBSET_P:
- {
- ebitset_elts *selts;
- ebitset_elts *delts;
- bitset_windex ssize;
- bitset_windex dsize;
-
- selts = EBITSET_ELTS (src);
- delts = EBITSET_ELTS (dst);
-
- ssize = EBITSET_SIZE (src);
- dsize = EBITSET_SIZE (dst);
-
- for (j = 0; j < ssize; j++)
- {
- ebitset_elt *selt;
- ebitset_elt *delt;
-
- selt = j < ssize ? selts[j] : 0;
- delt = j < dsize ? delts[j] : 0;
-
- if (!selt && !delt)
- continue;
-
- if (!selt)
- selt = &ebitset_zero_elts[0];
- if (!delt)
- delt = &ebitset_zero_elts[0];
-
- for (i = 0; i < EBITSET_ELT_WORDS; i++)
- if (EBITSET_WORDS (delt)[i]
- != (EBITSET_WORDS (selt)[i] | EBITSET_WORDS (delt)[i]))
- return 0;
- }
- return 1;
- }
- break;
-
- /* Return 1 if DST & SRC == 0. */
- case BITSET_OP_DISJOINT_P:
- {
- ebitset_elts *selts;
- ebitset_elts *delts;
- bitset_windex ssize;
- bitset_windex dsize;
-
- selts = EBITSET_ELTS (src);
- delts = EBITSET_ELTS (dst);
-
- ssize = EBITSET_SIZE (src);
- dsize = EBITSET_SIZE (dst);
-
- for (j = 0; j < ssize; j++)
- {
- ebitset_elt *selt;
- ebitset_elt *delt;
-
- selt = j < ssize ? selts[j] : 0;
- delt = j < dsize ? delts[j] : 0;
-
- if (!selt && !delt)
- continue;
-
- if (!selt)
- selt = &ebitset_zero_elts[0];
- if (!delt)
- delt = &ebitset_zero_elts[0];
-
- for (i = 0; i < EBITSET_ELT_WORDS; i++)
- if ((EBITSET_WORDS (selt)[i] & EBITSET_WORDS (delt)[i]))
- return 0;
- }
- return 1;
- }
- break;
+ if (!selt && !delt)
+ continue;
- default:
- abort ();
+ if (!selt)
+ selt = &ebitset_zero_elts[0];
+ if (!delt)
+ delt = &ebitset_zero_elts[0];
+
+ for (i = 0; i < EBITSET_ELT_WORDS; i++)
+ if (EBITSET_WORDS (delt)[i]
+ != (EBITSET_WORDS (selt)[i] | EBITSET_WORDS (delt)[i]))
+ return 0;
}
+ return 1;
+}
- EBITSET_NONZERO_SET (dst);
+
+/* Return 1 if DST & SRC == 0. */
+static int
+ebitset_disjoint_p (bitset dst, bitset src)
+{
+ bitset_windex j;
+ ebitset_elts *selts;
+ ebitset_elts *delts;
+ bitset_windex ssize;
+ bitset_windex dsize;
+
+ selts = EBITSET_ELTS (src);
+ delts = EBITSET_ELTS (dst);
+
+ ssize = EBITSET_SIZE (src);
+ dsize = EBITSET_SIZE (dst);
+
+ for (j = 0; j < ssize; j++)
+ {
+ unsigned int i;
+ ebitset_elt *selt;
+ ebitset_elt *delt;
+
+ selt = j < ssize ? selts[j] : 0;
+ delt = j < dsize ? delts[j] : 0;
+
+ if (!selt || !delt)
+ continue;
+
+ for (i = 0; i < EBITSET_ELT_WORDS; i++)
+ if ((EBITSET_WORDS (selt)[i] & EBITSET_WORDS (delt)[i]))
+ return 0;
+ }
return 1;
}
+
static int
-ebitset_op3 (dst, src1, src2, op)
- bitset dst;
- bitset src1;
- bitset src2;
- enum bitset_ops op;
+ebitset_op3_cmp (bitset dst, bitset src1, bitset src2, enum bitset_ops op)
{
bitset_windex ssize1;
bitset_windex ssize2;
unsigned int i;
bitset_windex j;
- /* Fast track common, simple cases. */
- if (EBITSET_OP_ZERO_P (src2))
- {
- if (op == BITSET_OP_AND)
- {
- ebitset_weed (dst);
- changed = EBITSET_OP_ZERO_P (dst);
- ebitset_zero (dst);
- return changed;
- }
- else if (op == BITSET_OP_ANDN || op == BITSET_OP_OR
- || op == BITSET_OP_XOR)
- {
- return ebitset_copy_compare (dst, src1);
- }
- }
- else if (EBITSET_OP_ZERO_P (src1))
- {
- if (op == BITSET_OP_AND || op == BITSET_OP_ANDN)
- {
- ebitset_weed (dst);
- changed = EBITSET_OP_ZERO_P (dst);
- ebitset_zero (dst);
- return changed;
- }
- else if (op == BITSET_OP_OR || op == BITSET_OP_XOR)
- {
- return ebitset_copy_compare (dst, src2);
- }
- }
-
ssize1 = EBITSET_SIZE (src1);
ssize2 = EBITSET_SIZE (src2);
dsize = EBITSET_SIZE (dst);
}
break;
- case BITSET_OP_ORN:
- for (i = 0; i < EBITSET_ELT_WORDS; i++, dstp++)
- {
- bitset_word tmp = *srcp1++ | ~(*srcp2++);
-
- if (*dstp != tmp)
- {
- changed = 1;
- *dstp = tmp;
- }
- }
- break;
-
default:
abort ();
}
}
+static int
+ebitset_and_cmp (bitset dst, bitset src1, bitset src2)
+{
+ int changed;
+
+ if (EBITSET_ZERO_P (src2))
+ {
+ ebitset_weed (dst);
+ changed = EBITSET_ZERO_P (dst);
+ ebitset_zero (dst);
+ return changed;
+ }
+ else if (EBITSET_ZERO_P (src1))
+ {
+ ebitset_weed (dst);
+ changed = EBITSET_ZERO_P (dst);
+ ebitset_zero (dst);
+ return changed;
+ }
+ return ebitset_op3_cmp (dst, src1, src2, BITSET_OP_AND);
+}
+
+
+static void
+ebitset_and (bitset dst, bitset src1, bitset src2)
+{
+ ebitset_and_cmp (dst, src1, src2);
+}
+
+
+static int
+ebitset_andn_cmp (bitset dst, bitset src1, bitset src2)
+{
+ int changed;
+
+ if (EBITSET_ZERO_P (src2))
+ {
+ return ebitset_copy_cmp (dst, src1);
+ }
+ else if (EBITSET_ZERO_P (src1))
+ {
+ ebitset_weed (dst);
+ changed = EBITSET_ZERO_P (dst);
+ ebitset_zero (dst);
+ return changed;
+ }
+ return ebitset_op3_cmp (dst, src1, src2, BITSET_OP_ANDN);
+}
+
+
+static void
+ebitset_andn (bitset dst, bitset src1, bitset src2)
+{
+ ebitset_andn_cmp (dst, src1, src2);
+}
+
+
+static int
+ebitset_or_cmp (bitset dst, bitset src1, bitset src2)
+{
+ if (EBITSET_ZERO_P (src2))
+ {
+ return ebitset_copy_cmp (dst, src1);
+ }
+ else if (EBITSET_ZERO_P (src1))
+ {
+ return ebitset_copy_cmp (dst, src2);
+ }
+ return ebitset_op3_cmp (dst, src1, src2, BITSET_OP_OR);
+}
+
+
+static void
+ebitset_or (bitset dst, bitset src1, bitset src2)
+{
+ ebitset_or_cmp (dst, src1, src2);
+}
+
+
+static int
+ebitset_xor_cmp (bitset dst, bitset src1, bitset src2)
+{
+ if (EBITSET_ZERO_P (src2))
+ {
+ return ebitset_copy_cmp (dst, src1);
+ }
+ else if (EBITSET_ZERO_P (src1))
+ {
+ return ebitset_copy_cmp (dst, src2);
+ }
+ return ebitset_op3_cmp (dst, src1, src2, BITSET_OP_XOR);
+}
+
+
+static void
+ebitset_xor (bitset dst, bitset src1, bitset src2)
+{
+ ebitset_xor_cmp (dst, src1, src2);
+}
+
+
+static void
+ebitset_copy (bitset dst, bitset src)
+{
+ if (BITSET_COMPATIBLE_ (dst, src))
+ ebitset_copy_ (dst, src);
+ else
+ bitset_copy_ (dst, src);
+}
+
+
/* Vector of operations for linked-list bitsets. */
-struct bitset_ops_struct ebitset_ops = {
+struct bitset_vtable ebitset_vtable = {
ebitset_set,
ebitset_reset,
+ bitset_toggle_,
ebitset_test,
ebitset_size,
- ebitset_op1,
- ebitset_op2,
- ebitset_op3,
- bitset_op4,
+ bitset_count_,
+ ebitset_empty_p,
+ ebitset_ones,
+ ebitset_zero,
+ ebitset_copy,
+ ebitset_disjoint_p,
+ ebitset_equal_p,
+ ebitset_not,
+ ebitset_subset_p,
+ ebitset_and,
+ ebitset_and_cmp,
+ ebitset_andn,
+ ebitset_andn_cmp,
+ ebitset_or,
+ ebitset_or_cmp,
+ ebitset_xor,
+ ebitset_xor_cmp,
+ bitset_and_or_,
+ bitset_and_or_cmp_,
+ bitset_andn_or_,
+ bitset_andn_or_cmp_,
+ bitset_or_and_,
+ bitset_or_and_cmp_,
ebitset_list,
- ebitset_reverse_list,
+ ebitset_list_reverse,
ebitset_free,
BITSET_TABLE
};
/* Return size of initial structure. */
-int
-ebitset_bytes (n_bits)
- bitset_bindex n_bits ATTRIBUTE_UNUSED;
+size_t
+ebitset_bytes (bitset_bindex n_bits ATTRIBUTE_UNUSED)
{
- return sizeof (struct bitset_struct);
+ return sizeof (struct ebitset_struct);
}
/* Initialize a bitset. */
bitset
-ebitset_init (bset, n_bits)
- bitset bset;
- bitset_bindex n_bits;
+ebitset_init (bitset bset, bitset_bindex n_bits)
{
- unsigned int size;
+ bitset_windex size;
- bset->b.ops = &ebitset_ops;
+ bset->b.vtable = &ebitset_vtable;
bset->b.csize = EBITSET_ELT_WORDS;
- EBITSET_OP_ZERO_SET (bset);
+ EBITSET_ZERO_SET (bset);
size = n_bits ? (n_bits + EBITSET_ELT_BITS - 1) / EBITSET_ELT_BITS
: EBITSET_INITIAL_SIZE;
void
-ebitset_release_memory ()
+ebitset_release_memory (void)
{
ebitset_free_list = 0;
if (ebitset_obstack_init)
projects / bison.git / blobdiff