81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*
|
|
* cpu.h 6800 cpu description file
|
|
* (c) in 2013-2014 by Esben Norby and Frank Wille
|
|
*/
|
|
|
|
#define BIGENDIAN 1
|
|
#define LITTLEENDIAN 0
|
|
#define VASM_CPU_6800 1
|
|
|
|
/* maximum number of operands for one mnemonic */
|
|
#define MAX_OPERANDS 4
|
|
|
|
/* maximum number of mnemonic-qualifiers per mnemonic */
|
|
#define MAX_QUALIFIERS 0
|
|
|
|
/* data type to represent a target-address */
|
|
typedef int16_t taddr;
|
|
typedef uint16_t utaddr;
|
|
|
|
/* minimum instruction alignment */
|
|
#define INST_ALIGN 1
|
|
|
|
/* default alignment for n-bit data */
|
|
#define DATA_ALIGN(n) 1
|
|
|
|
/* operand class for n-bit data definitions */
|
|
#define DATA_OPERAND(n) DATAOP
|
|
|
|
/* returns true when instruction is valid for selected cpu */
|
|
#define MNEMONIC_VALID(i) cpu_available(i)
|
|
|
|
/* allow commas and blanks at the same time to separate instruction operands */
|
|
#define OPERSEP_COMMA 1
|
|
#define OPERSEP_BLANK 1
|
|
|
|
/* we define two additional unary operations, '<' and '>' */
|
|
int ext_unary_eval(int,taddr,taddr *,int);
|
|
int ext_find_base(symbol **,expr *,section *,taddr);
|
|
#define LOBYTE (LAST_EXP_TYPE+1)
|
|
#define HIBYTE (LAST_EXP_TYPE+2)
|
|
#define EXT_UNARY_NAME(s) (*s=='<'||*s=='>')
|
|
#define EXT_UNARY_TYPE(s) (*s=='<'?LOBYTE:HIBYTE)
|
|
#define EXT_UNARY_EVAL(t,v,r,c) ext_unary_eval(t,v,r,c)
|
|
#define EXT_FIND_BASE(b,e,s,p) ext_find_base(b,e,s,p)
|
|
|
|
/* type to store each operand */
|
|
typedef struct {
|
|
uint16_t type;
|
|
uint8_t code[2];
|
|
expr *value;
|
|
} operand;
|
|
|
|
|
|
/* additional mnemonic data */
|
|
typedef struct {
|
|
unsigned char prebyte;
|
|
unsigned char opcode;
|
|
unsigned char dir_opcode; /* !=0 means optimization to DIR allowed */
|
|
uint8_t available;
|
|
} mnemonic_extension;
|
|
|
|
/* available */
|
|
#define M6800 1
|
|
#define M6801 2 /* 6801/6803: Adds D register and some extras */
|
|
#define M68HC11 4 /* standard 68HC11 instruction set */
|
|
|
|
/* adressing modes */
|
|
#define INH 0
|
|
#define IMM 1 /* #$12 */ /* IMM ii */
|
|
#define IMM16 2 /* #$1234 */ /* IMM jj kk */
|
|
#define ADDR 3
|
|
#define EXT 4 /* EXT hh */
|
|
#define DIR 5 /* DIR dd */
|
|
#define REL 6 /* REL rr */
|
|
#define REGX 7
|
|
#define REGY 8
|
|
#define DATAOP 9 /* data operand */
|
|
|
|
/* exported by cpu.c */
|
|
int cpu_available(int);
|