62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
|
|
#pragma once
|
|
|
|
/** \file
|
|
* \ingroup bli
|
|
*/
|
|
|
|
#include "BLI_math_inline.h"
|
|
#include "BLI_utildefines.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Search the value from LSB to MSB for a set bit. Returns index of this bit. */
|
|
|
|
MINLINE int bitscan_forward_i(int a);
|
|
MINLINE unsigned int bitscan_forward_uint(unsigned int a);
|
|
MINLINE unsigned int bitscan_forward_uint64(unsigned long long a);
|
|
|
|
/* Similar to above, but also clears the bit. */
|
|
|
|
MINLINE int bitscan_forward_clear_i(int *a);
|
|
MINLINE unsigned int bitscan_forward_clear_uint(unsigned int *a);
|
|
|
|
/* Search the value from MSB to LSB for a set bit. Returns index of this bit. */
|
|
|
|
MINLINE int bitscan_reverse_i(int a);
|
|
MINLINE unsigned int bitscan_reverse_uint(unsigned int a);
|
|
MINLINE unsigned int bitscan_reverse_uint64(unsigned long long a);
|
|
|
|
/* Similar to above, but also clears the bit. */
|
|
|
|
MINLINE int bitscan_reverse_clear_i(int *a);
|
|
MINLINE unsigned int bitscan_reverse_clear_uint(unsigned int *a);
|
|
|
|
/* NOTE: Those functions returns 2 to the power of index of highest order bit. */
|
|
|
|
MINLINE unsigned int highest_order_bit_uint(unsigned int n);
|
|
MINLINE unsigned short highest_order_bit_s(unsigned short n);
|
|
|
|
#ifdef __GNUC__
|
|
# define count_bits_i(i) __builtin_popcount(i)
|
|
#else
|
|
MINLINE int count_bits_i(unsigned int n);
|
|
#endif
|
|
|
|
MINLINE int float_as_int(float f);
|
|
MINLINE unsigned int float_as_uint(float f);
|
|
MINLINE float int_as_float(int i);
|
|
MINLINE float uint_as_float(unsigned int i);
|
|
MINLINE float xor_fl(float x, int y);
|
|
|
|
#if BLI_MATH_DO_INLINE
|
|
# include "intern/math_bits_inline.c"
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|