1 /* 2 * Mesa 3-D graphics library 3 * 4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included 14 * in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 /** 26 * \file mesa_private.h 27 * Contains mesa internal values 28 * 29 */ 30 31 #ifndef MESA_PRIVATE_H 32 #define MESA_PRIVATE_H 33 34 #include "glheader.h" 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 41 /** 42 * Sometimes we treat floats as ints. On x86 systems, moving a float 43 * as an int (thereby using integer registers instead of FP registers) is 44 * a performance win. Typically, this can be done with ordinary casts. 45 * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0) 46 * these casts generate warnings. 47 * The following union typedef is used to solve that. 48 */ 49 typedef union { float f; int i; unsigned u; } fi_type; 50 51 52 #ifdef __cplusplus 53 } 54 #endif 55 56 #endif /* MESA_PRIVATE_H */ 57