osprey/kgccfe/gnu/sbitmap.h

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/* Simple bitmaps.
   Copyright (C) 1999, 2000, 2002, 2003 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING.  If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.  */

#ifndef GCC_SBITMAP_H
#define GCC_SBITMAP_H 

/* It's not clear yet whether using bitmap.[ch] will be a win.
   It should be straightforward to convert so for now we keep things simple
   while more important issues are dealt with.  */

#define SBITMAP_ELT_BITS ((unsigned) HOST_BITS_PER_WIDE_INT)
#define SBITMAP_ELT_TYPE unsigned HOST_WIDE_INT

typedef struct simple_bitmap_def
{
  unsigned int n_bits;    /* Number of bits.  */
  unsigned int size;    /* Size in elements.  */
  unsigned int bytes;   /* Size in bytes.  */
  SBITMAP_ELT_TYPE elms[1]; /* The elements.  */
} *sbitmap;

typedef SBITMAP_ELT_TYPE *sbitmap_ptr;

/* Return the set size needed for N elements.  */
#define SBITMAP_SET_SIZE(N) (((N) + SBITMAP_ELT_BITS - 1) / SBITMAP_ELT_BITS)

/* Set bit number bitno in the bitmap.  */
#define SET_BIT(BITMAP, BITNO)          \
  ((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS]      \
   |= (SBITMAP_ELT_TYPE) 1 << (BITNO) % SBITMAP_ELT_BITS)

/* Test if bit number bitno in the bitmap is set.  */
#define TEST_BIT(BITMAP, BITNO) \
((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS] >> (BITNO) % SBITMAP_ELT_BITS & 1)

/* Reset bit number bitno in the bitmap.  */
#define RESET_BIT(BITMAP, BITNO)        \
  ((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS]      \
   &= ~((SBITMAP_ELT_TYPE) 1 << (BITNO) % SBITMAP_ELT_BITS))

/* Loop over all elements of SBITSET, starting with MIN.  */
#define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, CODE)    \
do {                  \
  unsigned int word_num_;           \
  unsigned int bit_num_ = (MIN) % (unsigned int) SBITMAP_ELT_BITS;  \
  unsigned int size_ = (SBITMAP)->size;         \
  SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms;       \
                  \
  for (word_num_ = (MIN) / (unsigned int) SBITMAP_ELT_BITS;   \
       word_num_ < size_; word_num_++, bit_num_ = 0)      \
    {                 \
      SBITMAP_ELT_TYPE word_ = ptr_[word_num_];       \
                  \
      if (word_ != 0)             \
  for (; bit_num_ < SBITMAP_ELT_BITS; bit_num_++)     \
    {               \
      SBITMAP_ELT_TYPE _mask = (SBITMAP_ELT_TYPE) 1 << bit_num_;  \
                  \
      if ((word_ & _mask) != 0)         \
        {               \
    word_ &= ~ _mask;         \
    (N) = word_num_ * SBITMAP_ELT_BITS + bit_num_;    \
    CODE;             \
    if (word_ == 0)           \
      break;            \
        }               \
    }               \
    }                 \
} while (0)

#define EXECUTE_IF_SET_IN_SBITMAP_REV(SBITMAP, N, CODE)     \
do {                  \
  unsigned int word_num_;           \
  unsigned int bit_num_;            \
  unsigned int size_ = (SBITMAP)->size;         \
  SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms;       \
                  \
  for (word_num_ = size_; word_num_ > 0; word_num_--)     \
    {                 \
      SBITMAP_ELT_TYPE word_ = ptr_[word_num_ - 1];     \
                  \
      if (word_ != 0)             \
  for (bit_num_ = SBITMAP_ELT_BITS; bit_num_ > 0; bit_num_--) \
    {               \
      SBITMAP_ELT_TYPE _mask = (SBITMAP_ELT_TYPE)1 << (bit_num_ - 1);\
                  \
      if ((word_ & _mask) != 0)         \
        {               \
    word_ &= ~ _mask;         \
    (N) = (word_num_ - 1) * SBITMAP_ELT_BITS + bit_num_ - 1;\
    CODE;             \
    if (word_ == 0)           \
      break;            \
        }               \
    }               \
    }                 \
} while (0)

#define sbitmap_free(MAP)   free(MAP)
#define sbitmap_vector_free(VEC)  free(VEC)

struct int_list;

extern void dump_sbitmap    PARAMS ((FILE *, sbitmap));
extern void dump_sbitmap_file   PARAMS ((FILE *, sbitmap));
extern void dump_sbitmap_vector   PARAMS ((FILE *, const char *,
             const char *, sbitmap *,
             int));
extern sbitmap sbitmap_alloc    PARAMS ((unsigned int));
extern sbitmap *sbitmap_vector_alloc  PARAMS ((unsigned int, unsigned int));
extern sbitmap sbitmap_resize   PARAMS ((sbitmap, unsigned int, int));
extern void sbitmap_copy    PARAMS ((sbitmap, sbitmap));
extern int sbitmap_equal                PARAMS ((sbitmap, sbitmap));
extern void sbitmap_zero    PARAMS ((sbitmap));
extern void sbitmap_ones    PARAMS ((sbitmap));
extern void sbitmap_vector_zero   PARAMS ((sbitmap *, unsigned int));
extern void sbitmap_vector_ones   PARAMS ((sbitmap *, unsigned int));

extern void sbitmap_union_of_diff PARAMS ((sbitmap, sbitmap, sbitmap,
             sbitmap));
extern bool sbitmap_union_of_diff_cg  PARAMS ((sbitmap, sbitmap, sbitmap,
             sbitmap));
extern void sbitmap_difference    PARAMS ((sbitmap, sbitmap, sbitmap));
extern void sbitmap_not     PARAMS ((sbitmap, sbitmap));
extern void sbitmap_a_or_b_and_c  PARAMS ((sbitmap, sbitmap, sbitmap,
             sbitmap));
extern bool sbitmap_a_or_b_and_c_cg PARAMS ((sbitmap, sbitmap, sbitmap,
             sbitmap));
extern void sbitmap_a_and_b_or_c  PARAMS ((sbitmap, sbitmap, sbitmap,
             sbitmap));
extern bool sbitmap_a_and_b_or_c_cg PARAMS ((sbitmap, sbitmap, sbitmap,
             sbitmap));
extern void sbitmap_a_and_b   PARAMS ((sbitmap, sbitmap, sbitmap));
extern bool sbitmap_a_and_b_cg    PARAMS ((sbitmap, sbitmap, sbitmap));
extern void sbitmap_a_or_b    PARAMS ((sbitmap, sbitmap, sbitmap));
extern bool sbitmap_a_or_b_cg   PARAMS ((sbitmap, sbitmap, sbitmap));
extern void sbitmap_a_xor_b   PARAMS ((sbitmap, sbitmap, sbitmap));
extern bool sbitmap_a_xor_b_cg    PARAMS ((sbitmap, sbitmap, sbitmap));
extern bool sbitmap_a_subset_b_p  PARAMS ((sbitmap, sbitmap));

extern int sbitmap_first_set_bit  PARAMS ((sbitmap));
extern int sbitmap_last_set_bit   PARAMS ((sbitmap));

extern void sbitmap_intersect_of_predsucc PARAMS ((sbitmap, sbitmap *,
              int, struct int_list **));
#define sbitmap_intersect_of_predecessors  sbitmap_intersect_of_predsucc
#define sbitmap_intersect_of_successors    sbitmap_intersect_of_predsucc

extern void sbitmap_union_of_predsucc PARAMS ((sbitmap, sbitmap *, int,
             struct int_list **));
#define sbitmap_union_of_predecessors  sbitmap_union_of_predsucc
#define sbitmap_union_of_successors    sbitmap_union_of_predsucc

/* Intersection and Union of preds/succs using the new flow graph 
   structure instead of the pred/succ arrays.  */

extern void sbitmap_intersection_of_succs  PARAMS ((sbitmap, sbitmap *, int));
extern void sbitmap_intersection_of_preds  PARAMS ((sbitmap, sbitmap *, int));
extern void sbitmap_union_of_succs     PARAMS ((sbitmap, sbitmap *, int));
extern void sbitmap_union_of_preds     PARAMS ((sbitmap, sbitmap *, int));

extern void debug_sbitmap      PARAMS ((sbitmap));
#endif /* ! GCC_SBITMAP_H */

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