diff options
Diffstat (limited to 'e2fsprogs/ext2fs/bitops.h')
| -rw-r--r-- | e2fsprogs/ext2fs/bitops.h | 513 |
1 files changed, 0 insertions, 513 deletions
diff --git a/e2fsprogs/ext2fs/bitops.h b/e2fsprogs/ext2fs/bitops.h index 96db548..b6446ef 100644 --- a/e2fsprogs/ext2fs/bitops.h +++ b/e2fsprogs/ext2fs/bitops.h @@ -103,516 +103,3 @@ extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap, __u32 bitno); extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap, blk_t bitno); -/* - * The inline routines themselves... - * - * If NO_INLINE_FUNCS is defined, then we won't try to do inline - * functions at all; they will be included as normal functions in - * inline.c - */ -#ifdef NO_INLINE_FUNCS -#if (defined(__GNUC__) && (defined(__i386__) || defined(__i486__) || \ - defined(__i586__) || defined(__mc68000__) || \ - defined(__sparc__))) - /* This prevents bitops.c from trying to include the C */ - /* function version of these functions */ -#define _EXT2_HAVE_ASM_BITOPS_ -#endif -#endif /* NO_INLINE_FUNCS */ - -#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) -#ifdef INCLUDE_INLINE_FUNCS -#define _INLINE_ extern -#else -#ifdef __GNUC__ -#define _INLINE_ extern __inline__ -#else /* For Watcom C */ -#define _INLINE_ extern inline -#endif -#endif - -#if ((defined __GNUC__) && !defined(_EXT2_USE_C_VERSIONS_) && \ - (defined(__i386__) || defined(__i486__) || defined(__i586__))) - -#define _EXT2_HAVE_ASM_BITOPS_ -#define _EXT2_HAVE_ASM_SWAB_ -#define _EXT2_HAVE_ASM_FINDBIT_ - -/* - * These are done by inline assembly for speed reasons..... - * - * All bitoperations return 0 if the bit was cleared before the - * operation and != 0 if it was not. Bit 0 is the LSB of addr; bit 32 - * is the LSB of (addr+1). - */ - -/* - * Some hacks to defeat gcc over-optimizations.. - */ -struct __dummy_h { unsigned long a[100]; }; -#define EXT2FS_ADDR (*(struct __dummy_h *) addr) -#define EXT2FS_CONST_ADDR (*(const struct __dummy_h *) addr) - -_INLINE_ int ext2fs_set_bit(int nr, void * addr) -{ - int oldbit; - - __asm__ __volatile__("btsl %2,%1\n\tsbbl %0,%0" - :"=r" (oldbit),"=m" (EXT2FS_ADDR) - :"r" (nr)); - return oldbit; -} - -_INLINE_ int ext2fs_clear_bit(int nr, void * addr) -{ - int oldbit; - - __asm__ __volatile__("btrl %2,%1\n\tsbbl %0,%0" - :"=r" (oldbit),"=m" (EXT2FS_ADDR) - :"r" (nr)); - return oldbit; -} - -_INLINE_ int ext2fs_test_bit(int nr, const void * addr) -{ - int oldbit; - - __asm__ __volatile__("btl %2,%1\n\tsbbl %0,%0" - :"=r" (oldbit) - :"m" (EXT2FS_CONST_ADDR),"r" (nr)); - return oldbit; -} - -#if 0 -_INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size) -{ - int d0, d1, d2; - int res; - - if (!size) - return 0; - /* This looks at memory. Mark it volatile to tell gcc not to move it around */ - __asm__ __volatile__( - "cld\n\t" - "xorl %%eax,%%eax\n\t" - "xorl %%edx,%%edx\n\t" - "repe; scasl\n\t" - "je 1f\n\t" - "movl -4(%%edi),%%eax\n\t" - "subl $4,%%edi\n\t" - "bsfl %%eax,%%edx\n" - "1:\tsubl %%esi,%%edi\n\t" - "shll $3,%%edi\n\t" - "addl %%edi,%%edx" - :"=d" (res), "=&c" (d0), "=&D" (d1), "=&a" (d2) - :"1" ((size + 31) >> 5), "2" (addr), "S" (addr)); - return res; -} - -_INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset) -{ - unsigned long * p = ((unsigned long *) addr) + (offset >> 5); - int set = 0, bit = offset & 31, res; - - if (bit) { - /* - * Look for zero in first byte - */ - __asm__("bsfl %1,%0\n\t" - "jne 1f\n\t" - "movl $32, %0\n" - "1:" - : "=r" (set) - : "r" (*p >> bit)); - if (set < (32 - bit)) - return set + offset; - set = 32 - bit; - p++; - } - /* - * No bit found yet, search remaining full bytes for a bit - */ - res = ext2fs_find_first_bit_set(p, size - 32 * (p - (unsigned long *) addr)); - return (offset + set + res); -} -#endif - -#ifdef EXT2FS_ENABLE_SWAPFS -_INLINE_ __u32 ext2fs_swab32(__u32 val) -{ -#ifdef EXT2FS_REQUIRE_486 - __asm__("bswap %0" : "=r" (val) : "0" (val)); -#else - __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ - "rorl $16,%0\n\t" /* swap words */ - "xchgb %b0,%h0" /* swap higher bytes */ - :"=q" (val) - : "0" (val)); -#endif - return val; -} - -_INLINE_ __u16 ext2fs_swab16(__u16 val) -{ - __asm__("xchgb %b0,%h0" /* swap bytes */ \ - : "=q" (val) \ - : "0" (val)); \ - return val; -} -#endif - -#undef EXT2FS_ADDR - -#endif /* i386 */ - -#ifdef __mc68000__ - -#define _EXT2_HAVE_ASM_BITOPS_ - -_INLINE_ int ext2fs_set_bit(int nr,void * addr) -{ - char retval; - - __asm__ __volatile__ ("bfset %2@{%1:#1}; sne %0" - : "=d" (retval) : "d" (nr^7), "a" (addr)); - - return retval; -} - -_INLINE_ int ext2fs_clear_bit(int nr, void * addr) -{ - char retval; - - __asm__ __volatile__ ("bfclr %2@{%1:#1}; sne %0" - : "=d" (retval) : "d" (nr^7), "a" (addr)); - - return retval; -} - -_INLINE_ int ext2fs_test_bit(int nr, const void * addr) -{ - char retval; - - __asm__ __volatile__ ("bftst %2@{%1:#1}; sne %0" - : "=d" (retval) : "d" (nr^7), "a" (addr)); - - return retval; -} - -#endif /* __mc68000__ */ - - -#if !defined(_EXT2_HAVE_ASM_SWAB_) && defined(EXT2FS_ENABLE_SWAPFS) - -_INLINE_ __u16 ext2fs_swab16(__u16 val) -{ - return (val >> 8) | (val << 8); -} - -_INLINE_ __u32 ext2fs_swab32(__u32 val) -{ - return ((val>>24) | ((val>>8)&0xFF00) | - ((val<<8)&0xFF0000) | (val<<24)); -} - -#endif /* !_EXT2_HAVE_ASM_SWAB */ - -#if !defined(_EXT2_HAVE_ASM_FINDBIT_) -_INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size) -{ - unsigned char *cp = (unsigned char *) addr; - int res = 0, d0; - - if (!size) - return 0; - - while ((size > res) && (*cp == 0)) { - cp++; - res += 8; - } - d0 = ffs(*cp); - if (d0 == 0) - return size; - - return res + d0 - 1; -} - -_INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset) -{ - unsigned char * p; - int set = 0, bit = offset & 7, res = 0, d0; - - res = offset >> 3; - p = ((unsigned char *) addr) + res; - - if (bit) { - set = ffs(*p & ~((1 << bit) - 1)); - if (set) - return (offset & ~7) + set - 1; - p++; - res += 8; - } - while ((size > res) && (*p == 0)) { - p++; - res += 8; - } - d0 = ffs(*p); - if (d0 == 0) - return size; - - return (res + d0 - 1); -} -#endif - -_INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap, - blk_t bitno); - -_INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap, - blk_t bitno) -{ - if ((bitno < bitmap->start) || (bitno > bitmap->end)) { - ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, bitno); - return 0; - } - return ext2fs_test_bit(bitno - bitmap->start, bitmap->bitmap); -} - -_INLINE_ int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, - blk_t block) -{ - return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) - bitmap, - block); -} - -_INLINE_ int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap, - blk_t block) -{ - return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap, - block); -} - -_INLINE_ int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, - blk_t block) -{ - return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap, - block); -} - -_INLINE_ int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, - ext2_ino_t inode) -{ - return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap, - inode); -} - -_INLINE_ int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, - ext2_ino_t inode) -{ - return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap, - inode); -} - -_INLINE_ int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, - ext2_ino_t inode) -{ - return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap, - inode); -} - -_INLINE_ void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap, - blk_t block) -{ -#ifdef EXT2FS_DEBUG_FAST_OPS - if ((block < bitmap->start) || (block > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block, - bitmap->description); - return; - } -#endif - ext2fs_set_bit(block - bitmap->start, bitmap->bitmap); -} - -_INLINE_ void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap, - blk_t block) -{ -#ifdef EXT2FS_DEBUG_FAST_OPS - if ((block < bitmap->start) || (block > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, - block, bitmap->description); - return; - } -#endif - ext2fs_clear_bit(block - bitmap->start, bitmap->bitmap); -} - -_INLINE_ int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap, - blk_t block) -{ -#ifdef EXT2FS_DEBUG_FAST_OPS - if ((block < bitmap->start) || (block > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, - block, bitmap->description); - return 0; - } -#endif - return ext2fs_test_bit(block - bitmap->start, bitmap->bitmap); -} - -_INLINE_ void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, - ext2_ino_t inode) -{ -#ifdef EXT2FS_DEBUG_FAST_OPS - if ((inode < bitmap->start) || (inode > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_MARK, - inode, bitmap->description); - return; - } -#endif - ext2fs_set_bit(inode - bitmap->start, bitmap->bitmap); -} - -_INLINE_ void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap, - ext2_ino_t inode) -{ -#ifdef EXT2FS_DEBUG_FAST_OPS - if ((inode < bitmap->start) || (inode > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_UNMARK, - inode, bitmap->description); - return; - } -#endif - ext2fs_clear_bit(inode - bitmap->start, bitmap->bitmap); -} - -_INLINE_ int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap, - ext2_ino_t inode) -{ -#ifdef EXT2FS_DEBUG_FAST_OPS - if ((inode < bitmap->start) || (inode > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_TEST, - inode, bitmap->description); - return 0; - } -#endif - return ext2fs_test_bit(inode - bitmap->start, bitmap->bitmap); -} - -_INLINE_ blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap) -{ - return bitmap->start; -} - -_INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap) -{ - return bitmap->start; -} - -_INLINE_ blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap) -{ - return bitmap->end; -} - -_INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap) -{ - return bitmap->end; -} - -_INLINE_ int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap, - blk_t block, int num) -{ - int i; - - if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, - block, bitmap->description); - return 0; - } - for (i=0; i < num; i++) { - if (ext2fs_fast_test_block_bitmap(bitmap, block+i)) - return 0; - } - return 1; -} - -_INLINE_ int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap, - blk_t block, int num) -{ - int i; - -#ifdef EXT2FS_DEBUG_FAST_OPS - if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST, - block, bitmap->description); - return 0; - } -#endif - for (i=0; i < num; i++) { - if (ext2fs_fast_test_block_bitmap(bitmap, block+i)) - return 0; - } - return 1; -} - -_INLINE_ void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, - blk_t block, int num) -{ - int i; - - if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block, - bitmap->description); - return; - } - for (i=0; i < num; i++) - ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap); -} - -_INLINE_ void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap, - blk_t block, int num) -{ - int i; - -#ifdef EXT2FS_DEBUG_FAST_OPS - if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block, - bitmap->description); - return; - } -#endif - for (i=0; i < num; i++) - ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap); -} - -_INLINE_ void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, - blk_t block, int num) -{ - int i; - - if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block, - bitmap->description); - return; - } - for (i=0; i < num; i++) - ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap); -} - -_INLINE_ void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap, - blk_t block, int num) -{ - int i; - -#ifdef EXT2FS_DEBUG_FAST_OPS - if ((block < bitmap->start) || (block+num-1 > bitmap->end)) { - ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block, - bitmap->description); - return; - } -#endif - for (i=0; i < num; i++) - ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap); -} -#undef _INLINE_ -#endif - |