mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
318 lines
10 KiB
C
318 lines
10 KiB
C
/* Functions to support general ended bitmaps.
|
|
Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU CC.
|
|
|
|
GNU CC 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.
|
|
|
|
GNU CC 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 GNU CC; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/* Number of words to use for each element in the linked list. */
|
|
|
|
#ifndef BITMAP_ELEMENT_WORDS
|
|
#define BITMAP_ELEMENT_WORDS 2
|
|
#endif
|
|
|
|
/* Number of bits in each actual element of a bitmap. We get slightly better
|
|
code for bit % BITMAP_ELEMENT_ALL_BITS and bit / BITMAP_ELEMENT_ALL_BITS if
|
|
bits is unsigned, assuming it is a power of 2. */
|
|
|
|
#define BITMAP_ELEMENT_ALL_BITS \
|
|
((unsigned) (BITMAP_ELEMENT_WORDS * HOST_BITS_PER_WIDE_INT))
|
|
|
|
/* Bitmap set element. We use a linked list to hold only the bits that
|
|
are set. This allows for use to grow the bitset dynamically without
|
|
having to realloc and copy a giant bit array. The `prev' field is
|
|
undefined for an element on the free list. */
|
|
|
|
typedef struct bitmap_element_def
|
|
{
|
|
struct bitmap_element_def *next; /* Next element. */
|
|
struct bitmap_element_def *prev; /* Previous element. */
|
|
unsigned int indx; /* regno/BITMAP_ELEMENT_ALL_BITS. */
|
|
unsigned HOST_WIDE_INT bits[BITMAP_ELEMENT_WORDS]; /* Bits that are set. */
|
|
} bitmap_element;
|
|
|
|
/* Head of bitmap linked list. */
|
|
typedef struct bitmap_head_def {
|
|
bitmap_element *first; /* First element in linked list. */
|
|
bitmap_element *current; /* Last element looked at. */
|
|
unsigned int indx; /* Index of last element looked at. */
|
|
} bitmap_head, *bitmap;
|
|
|
|
/* Enumeration giving the various operations we support. */
|
|
enum bitmap_bits {
|
|
BITMAP_AND, /* TO = FROM1 & FROM2 */
|
|
BITMAP_AND_COMPL, /* TO = FROM1 & ~ FROM2 */
|
|
BITMAP_IOR /* TO = FROM1 | FROM2 */
|
|
};
|
|
|
|
/* Global data */
|
|
extern bitmap_element *bitmap_free; /* Freelist of bitmap elements */
|
|
extern bitmap_element bitmap_zero; /* Zero bitmap element */
|
|
|
|
/* Clear a bitmap by freeing up the linked list. */
|
|
extern void bitmap_clear PROTO((bitmap));
|
|
|
|
/* Copy a bitmap to another bitmap. */
|
|
extern void bitmap_copy PROTO((bitmap, bitmap));
|
|
|
|
/* Perform an operation on two bitmaps, yielding a third. */
|
|
extern void bitmap_operation PROTO((bitmap, bitmap, bitmap, enum bitmap_bits));
|
|
|
|
/* `or' into one bitmap the `and' of a second bitmap witih the complement
|
|
of a third. */
|
|
extern void bitmap_ior_and_compl PROTO((bitmap, bitmap, bitmap));
|
|
|
|
/* Clear a single register in a register set. */
|
|
extern void bitmap_clear_bit PROTO((bitmap, int));
|
|
|
|
/* Set a single register in a register set. */
|
|
extern void bitmap_set_bit PROTO((bitmap, int));
|
|
|
|
/* Return true if a register is set in a register set. */
|
|
extern int bitmap_bit_p PROTO((bitmap, int));
|
|
|
|
/* Debug functions to print a bitmap linked list. */
|
|
extern void bitmap_debug PROTO((bitmap));
|
|
extern void bitmap_debug_file PROTO((FILE *, bitmap));
|
|
|
|
/* Print a bitmap */
|
|
extern void bitmap_print PROTO((FILE *, bitmap, const char *, const char *));
|
|
|
|
/* Initialize a bitmap header. */
|
|
extern bitmap bitmap_initialize PROTO((bitmap));
|
|
|
|
/* Release all memory held by bitmaps. */
|
|
extern void bitmap_release_memory PROTO((void));
|
|
|
|
extern void debug_bitmap PROTO((bitmap));
|
|
|
|
/* Allocate a bitmap with oballoc. */
|
|
#define BITMAP_OBSTACK_ALLOC(OBSTACK) \
|
|
bitmap_initialize ((bitmap) obstack_alloc (OBSTACK, sizeof (bitmap_head)))
|
|
|
|
/* Allocate a bitmap with alloca. */
|
|
#define BITMAP_ALLOCA() \
|
|
bitmap_initialize ((bitmap) alloca (sizeof (bitmap_head)))
|
|
|
|
/* Do any cleanup needed on a bitmap when it is no longer used. */
|
|
#define BITMAP_FREE(BITMAP) \
|
|
do { \
|
|
if (BITMAP) \
|
|
{ \
|
|
bitmap_clear (BITMAP); \
|
|
(BITMAP) = 0; \
|
|
} \
|
|
} while (0)
|
|
|
|
/* Do any one-time initializations needed for bitmaps. */
|
|
#define BITMAP_INIT_ONCE()
|
|
|
|
/* Loop over all bits in BITMAP, starting with MIN, setting BITNUM to the
|
|
bit number and executing CODE for all bits that are set. */
|
|
|
|
#define EXECUTE_IF_SET_IN_BITMAP(BITMAP, MIN, BITNUM, CODE) \
|
|
do { \
|
|
bitmap_element *ptr_ = (BITMAP)->first; \
|
|
unsigned int indx_ = (MIN) / BITMAP_ELEMENT_ALL_BITS; \
|
|
unsigned bit_num_ = (MIN) % ((unsigned) HOST_BITS_PER_WIDE_INT); \
|
|
unsigned word_num_ = (((MIN) / ((unsigned) HOST_BITS_PER_WIDE_INT)) \
|
|
% BITMAP_ELEMENT_WORDS); \
|
|
\
|
|
\
|
|
/* Find the block the minimum bit is in. */ \
|
|
while (ptr_ != 0 && ptr_->indx < indx_) \
|
|
ptr_ = ptr_->next; \
|
|
\
|
|
if (ptr_ != 0 && ptr_->indx != indx_) \
|
|
{ \
|
|
bit_num_ = 0; \
|
|
word_num_ = 0; \
|
|
} \
|
|
\
|
|
for (; ptr_ != 0; ptr_ = ptr_->next) \
|
|
{ \
|
|
for (; word_num_ < BITMAP_ELEMENT_WORDS; word_num_++) \
|
|
{ \
|
|
unsigned HOST_WIDE_INT word_ = ptr_->bits[word_num_]; \
|
|
\
|
|
if (word_ != 0) \
|
|
{ \
|
|
for (; bit_num_ < HOST_BITS_PER_WIDE_INT; bit_num_++) \
|
|
{ \
|
|
unsigned HOST_WIDE_INT mask_ \
|
|
= ((unsigned HOST_WIDE_INT) 1) << bit_num_; \
|
|
\
|
|
if ((word_ & mask_) != 0) \
|
|
{ \
|
|
word_ &= ~ mask_; \
|
|
(BITNUM) = (ptr_->indx * BITMAP_ELEMENT_ALL_BITS \
|
|
+ word_num_ * HOST_BITS_PER_WIDE_INT \
|
|
+ bit_num_); \
|
|
CODE; \
|
|
\
|
|
if (word_ == 0) \
|
|
break; \
|
|
} \
|
|
} \
|
|
} \
|
|
\
|
|
bit_num_ = 0; \
|
|
} \
|
|
\
|
|
word_num_ = 0; \
|
|
} \
|
|
} while (0)
|
|
|
|
/* Loop over all bits in BITMAP1 and BITMAP2, starting with MIN, setting
|
|
BITNUM to the bit number and executing CODE for all bits that are set in
|
|
the first bitmap and not set in the second. */
|
|
|
|
#define EXECUTE_IF_AND_COMPL_IN_BITMAP(BITMAP1, BITMAP2, MIN, BITNUM, CODE) \
|
|
do { \
|
|
bitmap_element *ptr1_ = (BITMAP1)->first; \
|
|
bitmap_element *ptr2_ = (BITMAP2)->first; \
|
|
unsigned int indx_ = (MIN) / BITMAP_ELEMENT_ALL_BITS; \
|
|
unsigned bit_num_ = (MIN) % ((unsigned) HOST_BITS_PER_WIDE_INT); \
|
|
unsigned word_num_ = (((MIN) / ((unsigned) HOST_BITS_PER_WIDE_INT)) \
|
|
% BITMAP_ELEMENT_WORDS); \
|
|
\
|
|
/* Find the block the minimum bit is in in the first bitmap. */ \
|
|
while (ptr1_ != 0 && ptr1_->indx < indx_) \
|
|
ptr1_ = ptr1_->next; \
|
|
\
|
|
if (ptr1_ != 0 && ptr1_->indx != indx_) \
|
|
{ \
|
|
bit_num_ = 0; \
|
|
word_num_ = 0; \
|
|
} \
|
|
\
|
|
for (; ptr1_ != 0 ; ptr1_ = ptr1_->next) \
|
|
{ \
|
|
/* Advance BITMAP2 to the equivalent link, using an all \
|
|
zero element if an equivalent link doesn't exist. */ \
|
|
bitmap_element *tmp2_; \
|
|
\
|
|
while (ptr2_ != 0 && ptr2_->indx < ptr1_->indx) \
|
|
ptr2_ = ptr2_->next; \
|
|
\
|
|
tmp2_ = ((ptr2_ != 0 && ptr2_->indx == ptr1_->indx) \
|
|
? ptr2_ : &bitmap_zero); \
|
|
\
|
|
for (; word_num_ < BITMAP_ELEMENT_WORDS; word_num_++) \
|
|
{ \
|
|
unsigned HOST_WIDE_INT word_ = (ptr1_->bits[word_num_] \
|
|
& ~ tmp2_->bits[word_num_]); \
|
|
if (word_ != 0) \
|
|
{ \
|
|
for (; bit_num_ < HOST_BITS_PER_WIDE_INT; bit_num_++) \
|
|
{ \
|
|
unsigned HOST_WIDE_INT mask_ \
|
|
= ((unsigned HOST_WIDE_INT)1) << bit_num_; \
|
|
\
|
|
if ((word_ & mask_) != 0) \
|
|
{ \
|
|
word_ &= ~ mask_; \
|
|
(BITNUM) = (ptr1_->indx * BITMAP_ELEMENT_ALL_BITS \
|
|
+ word_num_ * HOST_BITS_PER_WIDE_INT \
|
|
+ bit_num_); \
|
|
\
|
|
CODE; \
|
|
if (word_ == 0) \
|
|
break; \
|
|
} \
|
|
} \
|
|
} \
|
|
\
|
|
bit_num_ = 0; \
|
|
} \
|
|
\
|
|
word_num_ = 0; \
|
|
} \
|
|
} while (0)
|
|
|
|
/* Loop over all bits in BITMAP1 and BITMAP2, starting with MIN, setting
|
|
BITNUM to the bit number and executing CODE for all bits that are set in
|
|
the both bitmaps. */
|
|
|
|
#define EXECUTE_IF_AND_IN_BITMAP(BITMAP1, BITMAP2, MIN, BITNUM, CODE) \
|
|
do { \
|
|
bitmap_element *ptr1_ = (BITMAP1)->first; \
|
|
bitmap_element *ptr2_ = (BITMAP2)->first; \
|
|
unsigned int indx_ = (MIN) / BITMAP_ELEMENT_ALL_BITS; \
|
|
unsigned bit_num_ = (MIN) % ((unsigned) HOST_BITS_PER_WIDE_INT); \
|
|
unsigned word_num_ = (((MIN) / ((unsigned) HOST_BITS_PER_WIDE_INT)) \
|
|
% BITMAP_ELEMENT_WORDS); \
|
|
\
|
|
/* Find the block the minimum bit is in in the first bitmap. */ \
|
|
while (ptr1_ != 0 && ptr1_->indx < indx_) \
|
|
ptr1_ = ptr1_->next; \
|
|
\
|
|
if (ptr1_ != 0 && ptr1_->indx != indx_) \
|
|
{ \
|
|
bit_num_ = 0; \
|
|
word_num_ = 0; \
|
|
} \
|
|
\
|
|
for (; ptr1_ != 0 ; ptr1_ = ptr1_->next) \
|
|
{ \
|
|
/* Advance BITMAP2 to the equivalent link */ \
|
|
while (ptr2_ != 0 && ptr2_->indx < ptr1_->indx) \
|
|
ptr2_ = ptr2_->next; \
|
|
\
|
|
if (ptr2_ == 0) \
|
|
{ \
|
|
/* If there are no more elements in BITMAP2, exit loop now.*/ \
|
|
ptr1_ = (bitmap_element *)0; \
|
|
break; \
|
|
} \
|
|
else if (ptr2_->indx > ptr1_->indx) \
|
|
{ \
|
|
bit_num_ = word_num_ = 0; \
|
|
continue; \
|
|
} \
|
|
\
|
|
for (; word_num_ < BITMAP_ELEMENT_WORDS; word_num_++) \
|
|
{ \
|
|
unsigned HOST_WIDE_INT word_ = (ptr1_->bits[word_num_] \
|
|
& ptr2_->bits[word_num_]); \
|
|
if (word_ != 0) \
|
|
{ \
|
|
for (; bit_num_ < HOST_BITS_PER_WIDE_INT; bit_num_++) \
|
|
{ \
|
|
unsigned HOST_WIDE_INT mask_ \
|
|
= ((unsigned HOST_WIDE_INT)1) << bit_num_; \
|
|
\
|
|
if ((word_ & mask_) != 0) \
|
|
{ \
|
|
word_ &= ~ mask_; \
|
|
(BITNUM) = (ptr1_->indx * BITMAP_ELEMENT_ALL_BITS \
|
|
+ word_num_ * HOST_BITS_PER_WIDE_INT \
|
|
+ bit_num_); \
|
|
\
|
|
CODE; \
|
|
if (word_ == 0) \
|
|
break; \
|
|
} \
|
|
} \
|
|
} \
|
|
\
|
|
bit_num_ = 0; \
|
|
} \
|
|
\
|
|
word_num_ = 0; \
|
|
} \
|
|
} while (0)
|