forked from enlightenment/efl
83 lines
2.1 KiB
Plaintext
83 lines
2.1 KiB
Plaintext
/* EINA - EFL data type library
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* Copyright (C) 2007-2008 Jorge Luis Zapata Muga
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* Copyright (C) 2009 Cedric BAIL
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library;
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* if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef EINA_INLINE_F8P24_X_
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#define EINA_INLINE_F8P24_X_
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static inline Eina_F8p24
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eina_f8p24_add(Eina_F8p24 a, Eina_F8p24 b)
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{
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return a + b;
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}
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static inline Eina_F8p24
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eina_f8p24_sub(Eina_F8p24 a, Eina_F8p24 b)
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{
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return a - b;
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}
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static inline Eina_F8p24
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eina_f8p24_mul(Eina_F8p24 a, Eina_F8p24 b)
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{
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return (Eina_F8p24)(((int64_t) a * (int64_t) b) >> 24);
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}
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static inline Eina_F8p24
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eina_f8p24_scale(Eina_F8p24 a, int b)
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{
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return a * b;
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}
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static inline Eina_F8p24
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eina_f8p24_div(Eina_F8p24 a, Eina_F8p24 b)
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{
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return (Eina_F8p24) ((((int64_t) a) << 24) / (int64_t) b);
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}
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static inline Eina_F8p24
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eina_f8p24_sqrt(Eina_F8p24 a)
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{
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unsigned int root, remHi, remLo, testDiv, count;
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root = 0; /* Clear root */
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remHi = 0; /* Clear high part of partial remainder */
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remLo = a; /* Get argument into low part of partial remainder */
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count = 24; /* Load loop counter */
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do {
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remHi = (remHi << 8) | (remLo >> 24);
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remLo <<= 2; /* get 2 bits of arg */
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root <<= 1; /* Get ready for the next bit in the root */
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testDiv = (root << 1) + 1; /* Test radical */
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if (remHi >= testDiv)
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{
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remHi -= testDiv;
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root++;
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}
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} while (count-- != 0);
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return (root);
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}
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static inline unsigned int
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eina_f8p24_fracc_get(Eina_F8p24 v)
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{
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return (v & 0xffffff);
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}
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#endif
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