1 
2 /*
3  * Mesa 3-D graphics library
4  *
5  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the "Software"),
9  * to deal in the Software without restriction, including without limitation
10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11  * and/or sell copies of the Software, and to permit persons to whom the
12  * Software is furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included
15  * in all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23  * OTHER DEALINGS IN THE SOFTWARE.
24  */
25 
26 /*
27  * Transform function interface for assembly code.  Simply define
28  * FRAME_OFFSET to the number of bytes pushed onto the stack before
29  * using the ARG_* argument macros.
30  *
31  * Gareth Hughes
32  */
33 
34 #ifndef __XFORM_ARGS_H__
35 #define __XFORM_ARGS_H__
36 
37 /* Offsets for transform_func arguments
38  *
39  * typedef void (*transform_func)( GLvector4f *to_vec,
40  *				   const GLfloat m[16],
41  *				   const GLvector4f *from_vec );
42  */
43 #define OFFSET_DEST	4
44 #define OFFSET_MATRIX	8
45 #define OFFSET_SOURCE	12
46 
47 #define ARG_DEST	REGOFF(FRAME_OFFSET+OFFSET_DEST, ESP)
48 #define ARG_MATRIX 	REGOFF(FRAME_OFFSET+OFFSET_MATRIX, ESP)
49 #define ARG_SOURCE 	REGOFF(FRAME_OFFSET+OFFSET_SOURCE, ESP)
50 
51 #endif
52