git.sur5r.net Git - cc65/blob - src/cc65/reginfo.h

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 reginfo.h                                 */
   4 /*                                                                           */
   5 /*                        6502 register tracking info                        */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2001-2002  Ullrich von Bassewitz                                      */
  10 /*                Wacholderweg 14                                            */
  11 /*                D-70597 Stuttgart                                          */
  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 #ifndef REGINFO_H
  37 #define REGINFO_H
  38
  39
  40
  41 /* common */
  42 #include "inline.h"
  43
  44
  45
  46 /*****************************************************************************/
  47 /*                                   Data                                    */
  48 /*****************************************************************************/
  49
  50
  51
  52 /* Register contents */
  53 typedef struct RegContents RegContents;
  54 struct RegContents {
  55     short       RegA;
  56     short       RegX;
  57     short       RegY;
  58     short       SRegLo;
  59     short       SRegHi;
  60     short       Tmp1;
  61 };
  62
  63 /* Register change info */
  64 typedef struct RegInfo RegInfo;
  65 struct RegInfo {
  66     RegContents In;             /* Incoming register values */
  67     RegContents Out;            /* Outgoing register values */
  68     RegContents Out2;           /* Alternative outgoing reg values for branches */
  69 };
  70
  71
  72
  73 /*****************************************************************************/
  74 /*                                   Code                                    */
  75 /*****************************************************************************/
  76
  77
  78
  79 void RC_Invalidate (RegContents* C);
  80 /* Invalidate all registers */
  81
  82 void RC_InvalidateZP (RegContents* C);
  83 /* Invalidate all ZP registers */
  84
  85 RegInfo* NewRegInfo (const RegContents* RC);
  86 /* Allocate a new register info, initialize and return it. If RC is not
  87  * a NULL pointer, it is used to initialize both, the input and output
  88  * registers. If the pointer is NULL, all registers are set to unknown.
  89  */
  90
  91 void FreeRegInfo (RegInfo* RI);
  92 /* Free a RegInfo struct */
  93
  94
  95
  96 /* End of reginfo.h */
  97 #endif
  98
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