Add some more implementation details

1 files changed, 45 insertions, 18 deletions

diff --git a/tpu.h b/tpu.h
index 702ccfc..6e93008 100644
--- a/tpu.h
+++ b/tpu.h
@@ -5,38 +5,57 @@
 #include <stdlib.h>
 
 #define TPU_MAP_BUCKETS 64
+#define LABEL_MAP_BUCKETS 64
+#define TPU_MAX_INST 256
 
-enum tpu_mode {
-	MODE_IDLE, MODE_RUN, MODE_READ, MODE_WRITE
+/* enum order is important ! */ 
+
+enum tpu_status {
+	STATUS_IDLE, STATUS_RUN, STATUS_READ, STATUS_WRITE
 };
 
 enum tpu_inst_type {
 	INST_NOP, INST_MOV, INST_SWP, INST_SAV,
 	INST_ADD, INST_SUB, INST_NEG, INST_JMP,
-	INST_JEZ, INST_JNZ, INST_JLZ, INST_JRO
+	INST_JEZ, INST_JNZ, INST_JGZ, INST_JLZ,
+	INST_JRO
 };
 
 enum tpu_inst_op_type {
-	OP_LIT, OP_UP, OP_DOWN, OP_LEFT, OP_RIGHT,
-	OP_ACC, OP_BAK, OP_NIL, OP_ANY, OP_LAST
+	OP_ACC, OP_BAK, OP_NIL, OP_LEFT, OP_RIGHT,
+	OP_UP, OP_DOWN, OP_ANY, OP_LAST, OP_LIT, OP_LABEL
 };
 
 enum tpu_port_dir {
-	DIR_UP, DIR_RIGHT, DIR_DOWN, DIR_LEFT
+	DIR_LEFT, DIR_RIGHT, DIR_UP, DIR_DOWN
 };
 
 enum tpu_port_type {
 	PORT_IN = 0b01, PORT_OUT = 0b10, PORT_BIDI = 0b11
 };
 
+struct label_map_link {
+	char *label;
+	size_t pc;
+	struct label_map_link *next;
+};
+
+struct label_map {
+	struct label_map_link *buckets[LABEL_MAP_BUCKETS];
+};
+
 struct tpu_inst_op {
 	enum tpu_inst_op_type type;
-	uint8_t lit;
+	union {
+		uint8_t lit;
+		char *label;
+	};
 };
 
 struct tpu_inst {
 	enum tpu_inst_type type;
 	struct tpu_inst_op ops[2];
+	uint8_t opcnt;
 };
 
 struct tpu_port {
@@ -45,18 +64,19 @@ struct tpu_port {
 	struct tpu_port *dst_port;
 	bool write, read;
 	uint8_t val;
+	bool attached;
 };
 
 struct tpu {
+	struct label_map labels;
 	struct tpu_port ports[4];
 	uint8_t acc, bak;
-	int x, y;
+	size_t x, y;
+	int last;
 
 	size_t pc;
-	struct inst *inst;
-	size_t inst_cap;
-	size_t inst_cnp;
-
+	struct tpu_inst insts[TPU_MAX_INST];
+	size_t inst_cnt;
 };
 
 struct tpu_map_link {
@@ -69,14 +89,21 @@ struct tpu_map {
 	struct tpu_map_link *buckets[TPU_MAP_BUCKETS];
 };
 
+void label_map_init(struct label_map *map);
+void label_map_deinit(struct label_map *map);
+bool label_map_add(struct label_map *map, const char *name, size_t pc);
+size_t label_map_get(struct label_map *map, const char *name);
+
 void tpu_init(struct tpu *tpu);
-void tpu_add_inst(struct tpu *tpu, enum tpu_inst_type inst,
-	int op1, uint8_t op1_lit, int op2, uint8_t op2_lit);
-void tpu_step(struct tpu *tpu, uint8_t *up, uint8_t *right,
-	uint8_t *down, uint8_t *left);
 void tpu_deinit(struct tpu *tpu);
+struct tpu_inst *tpu_current_inst(struct tpu *tpu);
+void tpu_init_ports(struct tpu *tpu, struct tpu_map *map);
+bool tpu_add_inst(struct tpu *tpu, enum tpu_inst_type inst,
+	int op1, uint8_t op1_lit, int op2, uint8_t op2_lit);
+enum tpu_status tpu_exec(struct tpu *tpu, struct tpu_inst *inst);
+void tpu_step(struct tpu *tpu);
 
 void tpu_map_init(struct tpu_map *map);
-void tpu_map_add(struct tpu_map *map, struct tpu *tpu);
-struct tpu *tpu_map_get(int x, int y);
 void tpu_map_deinit(struct tpu_map *map);
+void tpu_map_add(struct tpu_map *map, struct tpu *tpu);
+struct tpu *tpu_map_get(struct tpu_map *map, size_t x, size_t y);