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

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 opcodes.h                                 */
   4 /*                                                                           */
   5 /*                  Opcode and addressing mode definitions                   */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2001     Ullrich von Bassewitz                                        */
  10 /*              Wacholderweg 14                                              */
  11 /*              D-70597 Stuttgart                                            */
  12 /* EMail:       uz@musoftware.de                                             */
  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 OPCODES_H
  37 #define OPCODES_H
  38
  39
  40
  41 /*****************************************************************************/
  42 /*                                   Data                                    */
  43 /*****************************************************************************/
  44
  45
  46
  47 /* Definitions for the possible opcodes */
  48 typedef enum {
  49     OPC_ADC,
  50     OPC_AND,
  51     OPC_ASL,
  52     OPC_BCC,
  53     OPC_BCS,
  54     OPC_BEQ,
  55     OPC_BIT,
  56     OPC_BMI,
  57     OPC_BNE,
  58     OPC_BPL,
  59     OPC_BRA,
  60     OPC_BRK,
  61     OPC_BVC,
  62     OPC_BVS,
  63     OPC_CLC,
  64     OPC_CLD,
  65     OPC_CLI,
  66     OPC_CLV,
  67     OPC_CMP,
  68     OPC_CPX,
  69     OPC_CPY,
  70     OPC_DEA,
  71     OPC_DEC,
  72     OPC_DEX,
  73     OPC_DEY,
  74     OPC_EOR,
  75     OPC_INA,
  76     OPC_INC,
  77     OPC_INX,
  78     OPC_INY,
  79     OPC_JMP,
  80     OPC_JSR,
  81     OPC_LDA,
  82     OPC_LDX,
  83     OPC_LDY,
  84     OPC_LSR,
  85     OPC_NOP,
  86     OPC_ORA,
  87     OPC_PHA,
  88     OPC_PHP,
  89     OPC_PHX,
  90     OPC_PHY,
  91     OPC_PLA,
  92     OPC_PLP,
  93     OPC_PLX,
  94     OPC_PLY,
  95     OPC_ROL,
  96     OPC_ROR,
  97     OPC_RTI,
  98     OPC_RTS,
  99     OPC_SBC,
 100     OPC_SEC,
 101     OPC_SED,
 102     OPC_SEI,
 103     OPC_STA,
 104     OPC_STX,
 105     OPC_STY,
 106     OPC_TAX,
 107     OPC_TAY,
 108     OPC_TRB,
 109     OPC_TSB,
 110     OPC_TSX,
 111     OPC_TXA,
 112     OPC_TXS,
 113     OPC_TYA,
 114     OPC_COUNT                   /* Number of opcodes available */
 115 } opc_t;
 116
 117 /* Addressing modes (bitmapped). */
 118 typedef enum {
 119     AM_IMP      = 0x0001,       /* implicit + accumulator */
 120     AM_IMM      = 0x0002,       /* immidiate */
 121     AM_ZP       = 0x0004,       /* zeropage */
 122     AM_ZPX      = 0x0008,       /* zeropage,X */
 123     AM_ABS      = 0x0010,       /* absolute */
 124     AM_ABSX     = 0x0020,       /* absolute,X */
 125     AM_ABSY     = 0x0040,       /* absolute,Y */
 126     AM_ZPX_IND  = 0x0080,       /* (zeropage,x) */
 127     AM_ZP_INDY  = 0x0100,       /* (zeropage),y */
 128     AM_ZP_IND   = 0x0200,       /* (zeropage) */
 129     AM_BRA      = 0x0400        /* branch */
 130 } am_t;
 131
 132 /* Opcode description */
 133 typedef struct {
 134     char        Mnemo[4];       /* Mnemonic */
 135     opc_t       OPC;            /* Opcode */
 136     unsigned    Usage;          /* Usage flags */
 137 } OPCDesc;
 138
 139
 140
 141 /*****************************************************************************/
 142 /*                                   Code                                    */
 143 /*****************************************************************************/
 144
 145
 146
 147 const OPCDesc* FindOpcode (const char* OPC);
 148 /* Find the given opcode and return the opcode description. If the opcode was
 149  * not found, NULL is returned.
 150  */
 151
 152 unsigned GetInsnSize (opc_t OPC, am_t AM);
 153 /* Return the size of the given instruction */
 154
 155 const OPCDesc* GetOPCDesc (opc_t OPC);
 156 /* Get an opcode description */
 157
 158
 159
 160 /* End of opcodes.h */
 161 #endif
 162
 163
 164