72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* */
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#pragma once
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/** \file
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* \ingroup bli
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*/
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#include "BLI_math_inline.h"
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#include "BLI_utildefines.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Search the value from LSB to MSB for a set bit. Returns index of this bit. */
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MINLINE int bitscan_forward_i(int a);
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MINLINE unsigned int bitscan_forward_uint(unsigned int a);
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MINLINE unsigned int bitscan_forward_uint64(unsigned long long a);
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/* Similar to above, but also clears the bit. */
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MINLINE int bitscan_forward_clear_i(int *a);
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MINLINE unsigned int bitscan_forward_clear_uint(unsigned int *a);
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/* Search the value from MSB to LSB for a set bit. Returns index of this bit. */
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MINLINE int bitscan_reverse_i(int a);
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MINLINE unsigned int bitscan_reverse_uint(unsigned int a);
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MINLINE unsigned int bitscan_reverse_uint64(unsigned long long a);
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/* Similar to above, but also clears the bit. */
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MINLINE int bitscan_reverse_clear_i(int *a);
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MINLINE unsigned int bitscan_reverse_clear_uint(unsigned int *a);
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/* NOTE: Those functions returns 2 to the power of index of highest order bit. */
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MINLINE unsigned int highest_order_bit_uint(unsigned int n);
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MINLINE unsigned short highest_order_bit_s(unsigned short n);
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#ifdef __GNUC__
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# define count_bits_i(i) __builtin_popcount(i)
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#else
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MINLINE int count_bits_i(unsigned int n);
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#endif
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MINLINE int float_as_int(float f);
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MINLINE unsigned int float_as_uint(float f);
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MINLINE float int_as_float(int i);
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MINLINE float uint_as_float(unsigned int i);
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MINLINE float xor_fl(float x, int y);
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#if BLI_MATH_DO_INLINE
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# include "intern/math_bits_inline.c"
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#endif
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#ifdef __cplusplus
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}
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#endif
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