sbitmap.h revision 52284
152284Sobrien/* Simple bitmaps. 252284Sobrien Copyright (C) 1999 Free Software Foundation, Inc. 352284Sobrien 452284SobrienThis file is part of GNU CC. 552284Sobrien 652284SobrienGNU CC is free software; you can redistribute it and/or modify 752284Sobrienit under the terms of the GNU General Public License as published by 852284Sobrienthe Free Software Foundation; either version 2, or (at your option) 952284Sobrienany later version. 1052284Sobrien 1152284SobrienGNU CC is distributed in the hope that it will be useful, 1252284Sobrienbut WITHOUT ANY WARRANTY; without even the implied warranty of 1352284SobrienMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1452284SobrienGNU General Public License for more details. 1552284Sobrien 1652284SobrienYou should have received a copy of the GNU General Public License 1752284Sobrienalong with GNU CC; see the file COPYING. If not, write to 1852284Sobrienthe Free Software Foundation, 59 Temple Place - Suite 330, 1952284SobrienBoston, MA 02111-1307, USA. */ 2052284Sobrien 2152284Sobrien/* It's not clear yet whether using bitmap.[ch] will be a win. 2252284Sobrien It should be straightforward to convert so for now we keep things simple 2352284Sobrien while more important issues are dealt with. */ 2452284Sobrien 2552284Sobrien#define SBITMAP_ELT_BITS HOST_BITS_PER_WIDE_INT 2652284Sobrien#define SBITMAP_ELT_TYPE unsigned HOST_WIDE_INT 2752284Sobrien 2852284Sobrientypedef struct simple_bitmap_def { 2952284Sobrien /* Number of bits. */ 3052284Sobrien int n_bits; 3152284Sobrien /* Size in elements. */ 3252284Sobrien int size; 3352284Sobrien /* Size in bytes. */ 3452284Sobrien int bytes; 3552284Sobrien /* The elements. */ 3652284Sobrien SBITMAP_ELT_TYPE elms[1]; 3752284Sobrien} *sbitmap; 3852284Sobrien 3952284Sobrientypedef SBITMAP_ELT_TYPE *sbitmap_ptr; 4052284Sobrien 4152284Sobrien/* Return the set size needed for N elements. */ 4252284Sobrien#define SBITMAP_SET_SIZE(n) (((n) + SBITMAP_ELT_BITS - 1) / SBITMAP_ELT_BITS) 4352284Sobrien 4452284Sobrien/* set bit number bitno in the bitmap */ 4552284Sobrien#define SET_BIT(bitmap, bitno) \ 4652284Sobrien ((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS] \ 4752284Sobrien |= (SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS) 4852284Sobrien 4952284Sobrien/* test if bit number bitno in the bitmap is set */ 5052284Sobrien#define TEST_BIT(bitmap, bitno) \ 5152284Sobrien((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS] >> (bitno) % SBITMAP_ELT_BITS & 1) 5252284Sobrien 5352284Sobrien/* reset bit number bitno in the bitmap */ 5452284Sobrien#define RESET_BIT(bitmap, bitno) \ 5552284Sobrien ((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS] \ 5652284Sobrien &= ~((SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS)) 5752284Sobrien 5852284Sobrien/* Loop over all elements of SBITSET, starting with MIN. */ 5952284Sobrien#define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, CODE) \ 6052284Sobriendo { \ 6152284Sobrien unsigned int bit_num_ = (MIN) % (unsigned) SBITMAP_ELT_BITS; \ 6252284Sobrien unsigned int word_num_ = (MIN) / (unsigned) SBITMAP_ELT_BITS; \ 6352284Sobrien unsigned int size_ = (SBITMAP)->size; \ 6452284Sobrien SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms; \ 6552284Sobrien \ 6652284Sobrien while (word_num_ < size_) \ 6752284Sobrien { \ 6852284Sobrien SBITMAP_ELT_TYPE word_ = ptr_[word_num_]; \ 6952284Sobrien if (word_ != 0) \ 7052284Sobrien { \ 7152284Sobrien for (; bit_num_ < SBITMAP_ELT_BITS; ++bit_num_) \ 7252284Sobrien { \ 7352284Sobrien SBITMAP_ELT_TYPE mask_ = (SBITMAP_ELT_TYPE)1 << bit_num_; \ 7452284Sobrien if ((word_ & mask_) != 0) \ 7552284Sobrien { \ 7652284Sobrien word_ &= ~mask_; \ 7752284Sobrien (N) = word_num_ * SBITMAP_ELT_BITS + bit_num_; \ 7852284Sobrien CODE; \ 7952284Sobrien if (word_ == 0) \ 8052284Sobrien break; \ 8152284Sobrien } \ 8252284Sobrien } \ 8352284Sobrien } \ 8452284Sobrien bit_num_ = 0; \ 8552284Sobrien word_num_++; \ 8652284Sobrien } \ 8752284Sobrien} while (0) 8852284Sobrien 8952284Sobrien#define sbitmap_free(map) free(map) 9052284Sobrien#define sbitmap_vector_free(vec) free(vec) 9152284Sobrien 9252284Sobrienextern void dump_sbitmap PROTO ((FILE *, sbitmap)); 9352284Sobrienextern void dump_sbitmap_vector PROTO ((FILE *, const char *, const char *, 9452284Sobrien sbitmap *, int)); 9552284Sobrien 9652284Sobrienextern sbitmap sbitmap_alloc PROTO ((int)); 9752284Sobrienextern sbitmap *sbitmap_vector_alloc PROTO ((int, int)); 9852284Sobrien 9952284Sobrienextern void sbitmap_copy PROTO ((sbitmap, sbitmap)); 10052284Sobrienextern void sbitmap_zero PROTO ((sbitmap)); 10152284Sobrienextern void sbitmap_ones PROTO ((sbitmap)); 10252284Sobrienextern void sbitmap_vector_zero PROTO ((sbitmap *, int)); 10352284Sobrienextern void sbitmap_vector_ones PROTO ((sbitmap *, int)); 10452284Sobrien 10552284Sobrienextern int sbitmap_union_of_diff PROTO ((sbitmap, sbitmap, sbitmap, sbitmap)); 10652284Sobrienextern void sbitmap_difference PROTO ((sbitmap, sbitmap, sbitmap)); 10752284Sobrienextern void sbitmap_not PROTO ((sbitmap, sbitmap)); 10852284Sobrienextern int sbitmap_a_or_b_and_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap)); 10952284Sobrienextern int sbitmap_a_and_b_or_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap)); 11052284Sobrienextern int sbitmap_a_and_b PROTO ((sbitmap, sbitmap, sbitmap)); 11152284Sobrienextern int sbitmap_a_or_b PROTO ((sbitmap, sbitmap, sbitmap)); 11252284Sobrien 11352284Sobrienstruct int_list; 11452284Sobrienextern void sbitmap_intersect_of_predsucc PROTO ((sbitmap, sbitmap *, 11552284Sobrien int, struct int_list **)); 11652284Sobrien#define sbitmap_intersect_of_predecessors sbitmap_intersect_of_predsucc 11752284Sobrien#define sbitmap_intersect_of_successors sbitmap_intersect_of_predsucc 11852284Sobrien 11952284Sobrienextern void sbitmap_union_of_predsucc PROTO ((sbitmap, sbitmap *, int, 12052284Sobrien struct int_list **)); 12152284Sobrien#define sbitmap_union_of_predecessors sbitmap_union_of_predsucc 12252284Sobrien#define sbitmap_union_of_successors sbitmap_union_of_predsucc 123