2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "SDL_config.h"
24 /* 3Dfx register definitions */
26 #include "3dfx_regs.h"
28 /* 3Dfx control macros */
30 #define tdfx_in8(reg) *(volatile Uint8 *)(mapped_io + (reg))
31 #define tdfx_in32(reg) *(volatile Uint32 *)(mapped_io + (reg))
33 #define tdfx_out8(reg,v) *(volatile Uint8 *)(mapped_io + (reg)) = v;
34 #define tdfx_out32(reg,v) *(volatile Uint32 *)(mapped_io + (reg)) = v;
37 /* Wait for fifo space */
38 #define tdfx_wait(space) \
40 while ( (tdfx_in8(TDFX_STATUS) & 0x1F) < space ) \
45 /* Wait for idle accelerator */
46 #define tdfx_waitidle() \
51 tdfx_out32(COMMAND_3D, COMMAND_3D_NOP); \
53 i = (tdfx_in32(TDFX_STATUS) & STATUS_BUSY) ? 0 : i + 1; \