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Diffstat (limited to 'src/mesa/main/bitset.h')
| -rw-r--r-- | src/mesa/main/bitset.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/src/mesa/main/bitset.h b/src/mesa/main/bitset.h new file mode 100644 index 00000000000..c27b4c474e0 --- /dev/null +++ b/src/mesa/main/bitset.h @@ -0,0 +1,160 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5 + * + * Copyright (C) 2006 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/** + * \file bitset.h + * \brief Bitset of arbitrary size definitions. + * \author Michal Krol + */ + +#ifndef BITSET_H +#define BITSET_H + +#include "imports.h" + +/**************************************************************************** + * generic bitset implementation + */ + +#define BITSET_WORD GLuint +#define BITSET_WORDBITS (sizeof (BITSET_WORD) * 8) + +/* bitset declarations + */ +#define BITSET_DECLARE(name, size) \ + BITSET_WORD name[((size) + BITSET_WORDBITS - 1) / BITSET_WORDBITS] + +/* bitset operations + */ +#define BITSET_COPY(x, y) memcpy( (x), (y), sizeof (x) ) +#define BITSET_EQUAL(x, y) (memcmp( (x), (y), sizeof (x) ) == 0) +#define BITSET_ZERO(x) memset( (x), 0, sizeof (x) ) +#define BITSET_ONES(x) memset( (x), 0xff, sizeof (x) ) + +#define BITSET_BITWORD(b) ((b) / BITSET_WORDBITS) +#define BITSET_BIT(b) (1 << ((b) % BITSET_WORDBITS)) + +/* single bit operations + */ +#define BITSET_TEST(x, b) ((x)[BITSET_BITWORD(b)] & BITSET_BIT(b)) +#define BITSET_SET(x, b) ((x)[BITSET_BITWORD(b)] |= BITSET_BIT(b)) +#define BITSET_CLEAR(x, b) ((x)[BITSET_BITWORD(b)] &= ~BITSET_BIT(b)) + +#define BITSET_MASK(b) ((b) == BITSET_WORDBITS ? ~0 : BITSET_BIT(b) - 1) +#define BITSET_RANGE(b, e) (BITSET_MASK((e) + 1) & ~BITSET_MASK(b)) + +/* bit range operations + */ +#define BITSET_TEST_RANGE(x, b, e) \ + (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \ + ((x)[BITSET_BITWORD(b)] & BITSET_RANGE(b, e)) : \ + (assert (!"BITSET_TEST_RANGE: bit range crosses word boundary"), 0)) +#define BITSET_SET_RANGE(x, b, e) \ + (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \ + ((x)[BITSET_BITWORD(b)] |= BITSET_RANGE(b, e)) : \ + (assert (!"BITSET_SET_RANGE: bit range crosses word boundary"), 0)) +#define BITSET_CLEAR_RANGE(x, b, e) \ + (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \ + ((x)[BITSET_BITWORD(b)] &= ~BITSET_RANGE(b, e)) : \ + (assert (!"BITSET_CLEAR_RANGE: bit range crosses word boundary"), 0)) + +/* Get first bit set in a bitset. + */ +static inline int +__bitset_ffs(const BITSET_WORD *x, int n) +{ + int i; + + for (i = 0; i < n; i++) { + if (x[i]) + return _mesa_ffs(x[i]) + BITSET_WORDBITS * i; + } + + return 0; +} + +#define BITSET_FFS(x) __bitset_ffs(x, Elements(x)) + +/**************************************************************************** + * 64-bit bitset implementation + */ + +#define BITSET64_WORD GLuint +#define BITSET64_WORDBITS (sizeof (BITSET64_WORD) * 8) + +/* bitset declarations + */ +#define BITSET64_DECLARE(name, size) \ + GLuint name[2] + +/* bitset operations + */ +#define BITSET64_COPY(x, y) do { (x)[0] = (y)[0]; (x)[1] = (y)[1]; } while (0) +#define BITSET64_EQUAL(x, y) ( (x)[0] == (y)[0] && (x)[1] == (y)[1] ) +#define BITSET64_ZERO(x) do { (x)[0] = 0; (x)[1] = 0; } while (0) +#define BITSET64_ONES(x) do { (x)[0] = 0xFF; (x)[1] = 0xFF; } while (0) + +#define BITSET64_BITWORD(b) ((b) / BITSET64_WORDBITS) +#define BITSET64_BIT(b) (1 << ((b) % BITSET64_WORDBITS)) + +/* single bit operations + */ +#define BITSET64_TEST(x, b) ((x)[BITSET64_BITWORD(b)] & BITSET64_BIT(b)) +#define BITSET64_SET(x, b) ((x)[BITSET64_BITWORD(b)] |= BITSET64_BIT(b)) +#define BITSET64_CLEAR(x, b) ((x)[BITSET64_BITWORD(b)] &= ~BITSET64_BIT(b)) + +#define BITSET64_MASK(b) ((b) == BITSET64_WORDBITS ? ~0 : BITSET64_BIT(b) - 1) +#define BITSET64_RANGE(b, e) (BITSET64_MASK((e) + 1) & ~BITSET64_MASK(b)) + +/* bit range operations + */ +#define BITSET64_TEST_SUBRANGE(x, b, e) \ + (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \ + ((x)[BITSET64_BITWORD(b)] & BITSET64_RANGE(b, e)) : \ + (assert (!"BITSET64_TEST_RANGE: bit range crosses word boundary"), 0)) +#define BITSET64_TEST_RANGE(x, b, e) \ + (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \ + (BITSET64_TEST_SUBRANGE(x, b, e)) : \ + (BITSET64_TEST_SUBRANGE(x, b, BITSET64_WORDBITS - 1) | \ + BITSET64_TEST_SUBRANGE(x, BITSET64_WORDBITS, e))) +#define BITSET64_SET_SUBRANGE(x, b, e) \ + (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \ + ((x)[BITSET64_BITWORD(b)] |= BITSET64_RANGE(b, e)) : \ + (assert (!"BITSET64_SET_RANGE: bit range crosses word boundary"), 0)) +#define BITSET64_SET_RANGE(x, b, e) \ + (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \ + (BITSET64_SET_SUBRANGE(x, b, e)) : \ + (BITSET64_SET_SUBRANGE(x, b, BITSET64_WORDBITS - 1) | \ + BITSET64_SET_SUBRANGE(x, BITSET64_WORDBITS, e))) +#define BITSET64_CLEAR_SUBRANGE(x, b, e) \ + (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \ + ((x)[BITSET64_BITWORD(b)] &= ~BITSET64_RANGE(b, e)) : \ + (assert (!"BITSET64_CLEAR_RANGE: bit range crosses word boundary"), 0)) +#define BITSET64_CLEAR_RANGE(x, b, e) \ + (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \ + (BITSET64_CLEAR_SUBRANGE(x, b, e)) : \ + (BITSET64_CLEAR_SUBRANGE(x, b, BITSET64_WORDBITS - 1) | \ + BITSET64_CLEAR_SUBRANGE(x, BITSET64_WORDBITS, e))) + +#endif |