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[cc65] / src / cc65 / stackptr.c
1 /*****************************************************************************/
2 /*                                                                           */
3 /*                                stackptr.c                                 */
4 /*                                                                           */
5 /*                    Manage the parameter stack pointer                     */
6 /*                                                                           */
7 /*                                                                           */
8 /*                                                                           */
9 /* (C) 2004-2006 Ullrich von Bassewitz                                       */
10 /*               Römerstraße 52                                              */
11 /*               D-70794 Filderstadt                                         */
12 /* EMail:        uz@cc65.org                                                 */
13 /*                                                                           */
14 /*                                                                           */
15 /* This software is provided 'as-is', without any expressed or implied       */
16 /* warranty.  In no event will the authors be held liable for any damages    */
17 /* arising from the use of this software.                                    */
18 /*                                                                           */
19 /* Permission is granted to anyone to use this software for any purpose,     */
20 /* including commercial applications, and to alter it and redistribute it    */
21 /* freely, subject to the following restrictions:                            */
22 /*                                                                           */
23 /* 1. The origin of this software must not be misrepresented; you must not   */
24 /*    claim that you wrote the original software. If you use this software   */
25 /*    in a product, an acknowledgment in the product documentation would be  */
26 /*    appreciated but is not required.                                       */
27 /* 2. Altered source versions must be plainly marked as such, and must not   */
28 /*    be misrepresented as being the original software.                      */
29 /* 3. This notice may not be removed or altered from any source              */
30 /*    distribution.                                                          */
31 /*                                                                           */
32 /*****************************************************************************/
33
34
35
36 /* cc65 */
37 #include "stackptr.h"
38
39
40
41 /*****************************************************************************/
42 /*                                   Data                                    */
43 /*****************************************************************************/
44
45
46
47 /* Compiler relative stackpointer */
48 int StackPtr = 0;
49
50
51
52 /*****************************************************************************/
53 /*                                   Code                                    */
54 /*****************************************************************************/
55
56
57
58 void SP_Push (const Type* T)
59 /* Adjust the stackpointer for a push of an argument of the given type */
60 {
61     StackPtr -= SizeOf (T);
62 }
63
64
65
66 void SP_Pop (const Type* T)
67 /* Adjust the stackpointer for a pop of an argument of the given type */
68 {
69     StackPtr += SizeOf (T);
70 }