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        0x00U
  59 #define REG_A           0x01U
  60 #define REG_X           0x02U
  61 #define REG_Y           0x04U
  62 #define REG_SREG_LO     0x08U
  63 #define REG_SREG_HI     0x10U
  64 #define REG_TMP1        0x20U
  65 #define REG_PTR1_LO     0x40U
  66 #define REG_PTR1_HI     0x80U
  67 #define REG_AX          (REG_A | REG_X)
  68 #define REG_XY          (REG_X | REG_Y)
  69 #define REG_AXY         (REG_A | REG_X | REG_Y)
  70
  71
  72
  73 /*****************************************************************************/
  74 /*                                   Code                                    */
  75 /*****************************************************************************/
  76
  77
  78
  79 void GetFuncInfo (const char* Name, unsigned char* Use, unsigned char* Chg);
  80 /* For the given function, lookup register information and combine it with
  81  * the information already in place. If the function is unknown, assume it
  82  * will use all registers and load all registers.
  83  */
  84
  85 unsigned char GetRegInfo (struct CodeSeg* S, unsigned Index);
  86 /* Determine register usage information for the instructions starting at the
  87  * given index.
  88  */
  89
  90 int RegAUsed (struct CodeSeg* S, unsigned Index);
  91 /* Check if the value in A is used. */
  92
  93 int RegXUsed (struct CodeSeg* S, unsigned Index);
  94 /* Check if the value in X is used. */
  95
  96 int RegYUsed (struct CodeSeg* S, unsigned Index);
  97 /* Check if the value in Y is used. */
  98
  99
 100
 101 /* End of codeinfo.h */
 102 #endif
 103
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