119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
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/*
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* Copyright (C) 2018, NVIDIA CORPORATION. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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*/
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#ifndef _FIXED_POINT_H
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#define _FIXED_POINT_H
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struct fixed_point {
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unsigned int int_part;
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unsigned int frac_part;
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unsigned int int_prec;
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unsigned int frac_prec;
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unsigned int int_mask;
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unsigned int frac_mask;
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};
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struct fixed_point fixed_point_init(
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unsigned int int_part,
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unsigned int frac_part,
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unsigned int int_prec,
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unsigned int frac_prec,
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unsigned int *error);
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struct fixed_point fixed_point_shift_left(
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struct fixed_point fp_arg,
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unsigned int places,
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unsigned int *error);
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struct fixed_point fixed_point_shift_right(
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struct fixed_point fp_arg,
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unsigned int places,
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unsigned int *error);
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struct fixed_point fixed_point_negate(
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struct fixed_point fp_arg,
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unsigned int *error);
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struct fixed_point fixed_point_add(
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struct fixed_point fp_arg1,
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struct fixed_point fp_arg2,
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unsigned int *error);
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/* returns difference = minuend - subtrahend */
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struct fixed_point fixed_point_sub(
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struct fixed_point minuend_arg,
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struct fixed_point subtrahend_arg,
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unsigned int *error);
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struct fixed_point fixed_point_mult(
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struct fixed_point fp_arg1,
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struct fixed_point fp_arg2,
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unsigned int *error);
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/* returns quotient = dividend / divisor*/
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struct fixed_point fixed_point_div(
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struct fixed_point dividend_arg,
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struct fixed_point divisor_arg,
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unsigned int *error);
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/* Return 1 is lhs < rhs, 0 otherwise */
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int fixed_point_lt(
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struct fixed_point fp_lhs_arg,
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struct fixed_point fp_rhs_arg,
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unsigned int *error);
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/* Return 1 is lhs > rhs, 0 otherwise */
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int fixed_point_gt(
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struct fixed_point fp_lhs_arg,
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struct fixed_point fp_rhs_arg,
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unsigned int *error);
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/* Return 1 is lhs <= rhs, 0 otherwise */
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int fixed_point_loet(
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struct fixed_point fp_lhs_arg,
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struct fixed_point fp_rhs_arg,
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unsigned int *error);
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/* Return 1 is lhs >= rhs, 0 otherwise */
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int fixed_point_goet(
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struct fixed_point fp_lhs_arg,
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struct fixed_point fp_rhs_arg,
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unsigned int *error);
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/* Return 1 is lhs == rhs, 0 otherwise */
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int fixed_point_eq(
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struct fixed_point fp_lhs_arg,
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struct fixed_point fp_rhs_arg,
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unsigned int *error);
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int fixed_point_to_int(
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struct fixed_point fp_arg,
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unsigned int *error);
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int fixed_point_ceil(
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struct fixed_point fp_arg,
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unsigned int *error);
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struct fixed_point fixed_point_min(
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struct fixed_point fp_arg1,
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struct fixed_point fp_arg2,
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unsigned int *error);
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struct fixed_point fixed_point_max(
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struct fixed_point fp_arg1,
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struct fixed_point fp_arg2,
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unsigned int *error);
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#endif /* _FIXED_POINT_H */
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