#ifndef DCPU16_H_3XXIQQG2
#define DCPU16_H_3XXIQQG2
+#include <stdlib.h>
+
/* the target system's concept of a word */
typedef unsigned short DCPU16_WORD;
/* a self-contained dcpu16 core */
struct dcpu16 {
- unsigned long long cycle; /* number of cycles this core has executed */
- DCPU16_WORD reg[8]; /* system registers, a b c x y z i j */
- DCPU16_WORD pc; /* program counter */
- DCPU16_WORD sp; /* stack pointer */
- DCPU16_WORD o; /* overflow */
- unsigned int skip_ : 1; /* skip execution of next instruction */
- DCPU16_WORD ram[DCPU16_RAM]; /* memory */
- DCPU16_WORD reg_work_[2]; /* (private) work registers for holding literal values while decoding instructions */
+ struct dcpu16_acct_cb *cb_table_; /* list of callbacks to invoke for certain events */
+ size_t cb_table_entries_; /* callback list maintenance */
+ size_t cb_table_allocated_; /* callback list maintenance */
+ unsigned int skip_ : 1; /* skip execution of next instruction */
+ DCPU16_WORD reg_work_[2]; /* work registers for holding literal values while decoding instructions */
+
+ unsigned long long cycle; /* number of cycles this core has executed */
+ DCPU16_WORD reg[8]; /* system registers, a b c x y z i j */
+ DCPU16_WORD pc; /* program counter */
+ DCPU16_WORD sp; /* stack pointer */
+ DCPU16_WORD o; /* overflow */
+ DCPU16_WORD ram[DCPU16_RAM]; /* memory */
+};
+
+/* these are used for accounting/watchpointing/modules/&c */
+typedef unsigned int dcpu16_acct_event;
+typedef void (dcpu16_ev_cb_t)(struct dcpu16 *, dcpu16_acct_event, DCPU16_WORD, void *);
+#define DCPU16_ACCT_EV_CYCLE (1<<1)
+#define DCPU16_ACCT_EV_READ (1<<2)
+#define DCPU16_ACCT_EV_WRITE (1<<3)
+#define DCPU16_ACCT_EV_NOP (1<<4)
+#define DCPU16_ACCT_EV_RESET (1<<5)
+struct dcpu16_acct_cb {
+ dcpu16_ev_cb_t *fn;
+ void *data;
+ dcpu16_acct_event mask;
};
/* instantiate a new core */
struct dcpu16 *dcpu16_new(void);
+/* reset a core to initial state */
+void dcpu16_reset(struct dcpu16 *);
+
/* print the current state of a core */
void dcpu16_state_print(struct dcpu16 *);
/* print the contents of ram from second to third argument */
void dcpu16_dump_ram(struct dcpu16 *, DCPU16_WORD, DCPU16_WORD);
-/* print the instruction at the specified address */
-void dcpu16_disassemble_print(struct dcpu16 *, DCPU16_WORD);
+/* print the instruction at the specified address, returns number of words consumed in decoding */
+DCPU16_WORD dcpu16_disassemble_print(struct dcpu16 *, DCPU16_WORD);
+/* register a callback for an accounting event */
+int dcpu16_acct_add(struct dcpu16 *, dcpu16_acct_event mask, dcpu16_ev_cb_t *fn, void *data);
/* execute the next instruction */
void dcpu16_step(struct dcpu16 *);
/* release a core */
void dcpu16_delete(struct dcpu16 **);
-/* register callbacks to handle warning and debug messages, defaults to writing to stderr */
+/* register callbacks to handle warning and debug messages, default is writing to stderr, may be set to null */
void dcpu16_warn_cb_set(void (*)(char *, ...));
void dcpu16_trace_cb_set(void (*)(char *, ...));