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102 lines
1.3 KiB
C
102 lines
1.3 KiB
C
#define DEBUG
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#define H8500_MSIZE (8*64*1024)
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#define CSIZE 1000
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union rtype
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{
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unsigned long l;
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unsigned short s[2];
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unsigned char *c;
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};
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/* Local register names */
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typedef enum
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{
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R0, R1, R2, R3, R4, R5, R6, R7,
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R_SR, /* 8 */
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R_PC, /* 9 */
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R_BR, /* 10 */
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R_BP, /* 11 */
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R_CP, /* 14 */
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R_DP, /* 13 */
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R_EP, /* 12 */
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R_TP, /* 15 */
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R_HARD_0, /* 16 */
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R_HARD8_0, /* 17 */
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R_LAST,
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} reg_type;
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typedef struct
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{
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fastref type;
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union
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{
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int code;
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unsigned char *bptr;
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unsigned short *wptr;
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unsigned long *lptr;
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unsigned char **segptr;
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union rtype *rptr;
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}
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reg;
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int literal;
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union
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{
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unsigned char **segreg;
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unsigned short *wptr;
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union rtype *rptr;
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}
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r2;
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}
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ea_type;
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typedef struct
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{
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ea_type srca;
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ea_type srcb;
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ea_type dst;
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fastref opcode;
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fastref flags;
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int next_pc;
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int oldpc;
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int cycles;
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#ifdef DEBUG
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h8500_opcode_info *op;
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#endif
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}
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decoded_inst;
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typedef struct
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{
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int exception;
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union rtype regs[20];
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unsigned char *memory;
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unsigned short *cache_idx;
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int cache_top;
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int maximum;
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int csize;
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decoded_inst *cache;
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int cycles;
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int insts;
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int ticks;
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int compiles;
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}
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cpu_state_type;
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