112 lines
1.7 KiB
C
112 lines
1.7 KiB
C
#ifndef CPU_HEADER
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#include "simdata.h"
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struct fetch_data_t{
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uint8_t wait_for_exec;
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uint8_t exec_done;
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uint8_t decode_done;
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int fetch_wait;
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};
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struct decode_data_t{
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uint32_t in_bytecode;
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uint32_t address; // used only for the gui hints (for now)
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uint8_t valid;
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uint8_t exec_done;
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};
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///// EXEC DATA STRUCTURES ///////
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enum EXEC_ACTION_t {
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EXEC_ALU,
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MOVE,
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JUMP,
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CALL,
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NOP,
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HALT,
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RET,
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PUSH,
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POP
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};
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enum ALU_OP_t {
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ALU_ADD,
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ALU_SUB,
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ALU_SL,
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ALU_SR,
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ALU_CMP,
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ALU_FDIV,
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ALU_FMUL,
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ALU_FADD,
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ALU_FSUB,
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ALU_FSIN,
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ALU_FCOS,
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ALU_DEC,
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ALU_INC
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};
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enum OP_ADDR_t {
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IMMEDIATE,
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REGISTER,
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REGISTERL, //low word
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REGISTERH, //high word
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REGISTER_IND
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};
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struct exec_op_t {
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enum OP_ADDR_t OP_ADDR;
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uint32_t data;
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};
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enum COND_t{
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COND_NONE,
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COND_ZERO,
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COND_NZERO,
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COND_CARRY,
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COND_NCARRY,
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COND_SIGN,
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COND_NSIGN
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};
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struct exec_data_t {
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enum EXEC_ACTION_t EXEC_ACTION;
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enum ALU_OP_t ALU_OP;
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enum COND_t COND;
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struct exec_op_t *in_op1;
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struct exec_op_t *in_op2;
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struct exec_op_t *out_op;
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uint32_t address; // used only for the gui hints (for now)
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uint8_t valid;
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uint8_t cycles_left;
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};
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char* EXEC_ACTION_t_to_string(enum EXEC_ACTION_t in);
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char* ALU_OP_t_to_string(enum ALU_OP_t in);
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char* COND_t_to_string(enum COND_t in);
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char* OP_ADDR_t_to_string(enum OP_ADDR_t in);
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void cpu_simdata_free(struct simdata_t *simdata);
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int cpu_simdata_malloc(struct simdata_t *simdata);
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int cpu_cycle_clock(struct simdata_t *simdata);
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// +===================+
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// | BIT | USAGE |
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// |-----+-------------|
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// | 0 | ZERO |
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// |-----+-------------|
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// | 1 | CARRY |
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// |-----+-------------|
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// | 2 | SIGN |
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//
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struct registers_t{
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uint32_t GPR[8];
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uint32_t FLAGS;
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uint32_t PC;
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uint32_t SP;
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};
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#endif
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#define CPU_HEADER
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