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

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                codeinfo.h                                 */
   4 /*                                                                           */
   5 /*                  Additional information about 6502 code                   */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2001      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 CODEINFO_H
  37 #define CODEINFO_H
  38
  39
  40
  41 /*****************************************************************************/
  42 /*                                 Forwards                                  */
  43 /*****************************************************************************/
  44
  45
  46
  47 struct CodeSeg;
  48
  49
  50
  51 /*****************************************************************************/
  52 /*                                   Data                                    */
  53 /*****************************************************************************/
  54
  55
  56
  57 /* Defines for registers. */
  58 #define REG_NONE        0x0000U
  59 #define REG_A           0x0001U
  60 #define REG_X           0x0002U
  61 #define REG_Y           0x0004U
  62 #define REG_TMP1        0x0008U
  63 #define REG_PTR1_LO     0x0010U
  64 #define REG_PTR1_HI     0x0020U
  65 #define REG_PTR2_LO     0x0040U
  66 #define REG_PTR2_HI     0x0080U
  67 #define REG_SREG_LO     0x0100U
  68 #define REG_SREG_HI     0x0200U
  69 #define REG_SAVE_LO     0x0400U
  70 #define REG_SAVE_HI     0x0800U
  71 #define REG_SP_LO       0x1000U
  72 #define REG_SP_HI       0x2000U
  73
  74
  75 /* Combined register defines */
  76 #define REG_PTR1        (REG_PTR1_LO | REG_PTR1_HI)
  77 #define REG_PTR2        (REG_PTR2_LO | REG_PTR2_HI)
  78 #define REG_SREG        (REG_SREG_LO | REG_SREG_HI)
  79 #define REG_SAVE        (REG_SAVE_LO | REG_SAVE_HI)
  80 #define REG_SP          (REG_SP_LO | REG_SP_HI)
  81 #define REG_AX          (REG_A | REG_X)
  82 #define REG_AY          (REG_A | REG_Y)
  83 #define REG_XY          (REG_X | REG_Y)
  84 #define REG_AXY         (REG_AX | REG_Y)
  85 #define REG_EAX         (REG_AX | REG_SREG)
  86 #define REG_EAXY        (REG_EAX | REG_Y)
  87 #define REG_ZP          0xFFF8U
  88 #define REG_ALL         0xFFFFU
  89
  90
  91
  92 /* Zero page register info */
  93 typedef struct ZPInfo ZPInfo;
  94 struct ZPInfo {
  95     unsigned char  Len;         /* Length of the following string */
  96     char           Name[11];    /* Name of zero page symbol */
  97     unsigned short ByteUse;     /* Register info for this symbol */
  98     unsigned short WordUse;     /* Register info for 16 bit access */
  99 };
 100
 101
 102
 103 /*****************************************************************************/
 104 /*                                   Code                                    */
 105 /*****************************************************************************/
 106
 107
 108
 109 void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg);
 110 /* For the given function, lookup register information and store it into
 111  * the given variables. If the function is unknown, assume it will use and
 112  * load all registers.
 113  */
 114
 115 const ZPInfo* GetZPInfo (const char* Name);
 116 /* If the given name is a zero page symbol, return a pointer to the info
 117  * struct for this symbol, otherwise return NULL.
 118  */
 119
 120 unsigned GetRegInfo (struct CodeSeg* S, unsigned Index, unsigned Wanted);
 121 /* Determine register usage information for the instructions starting at the
 122  * given index.
 123  */
 124
 125 int RegAUsed (struct CodeSeg* S, unsigned Index);
 126 /* Check if the value in A is used. */
 127
 128 int RegXUsed (struct CodeSeg* S, unsigned Index);
 129 /* Check if the value in X is used. */
 130
 131 int RegYUsed (struct CodeSeg* S, unsigned Index);
 132 /* Check if the value in Y is used. */
 133
 134
 135
 136 /* End of codeinfo.h */
 137 #endif
 138
 139
 140
 141