#include <cpu.h>
#include <emu.h>

//process CPU instructions...

static void proc_none(cpu_context *ctx) {
    printf("INVALID INSTRUCTION!\n");
    exit(-7);
}

static void proc_nop(cpu_context *ctx) {
    
}

static void proc_ld(cpu_context *ctx) {
    //TODO
}

static bool check_condition(cpu_context *ctx) {
    bool z = CPU_FLAG_Z;
    bool c = CPU_FLAG_C;

    switch(ctx->cur_inst->cond) {
        case CT_NONE: return true;
        case CT_C: return c;
        case CT_NC: return !c;
        case CT_Z: return z;
        case CT_NZ: return !z;
    }

    return false;
}

static void proc_jp(cpu_context *ctx) {
    if (check_condition(ctx)) {
        ctx->regs.pc = ctx->fetched_data;
        emu_cycles(1);
    }
}

IN_PROC processors[] = {
    [IN_NONE] = proc_none,
    [IN_NOP] = proc_nop,
    [IN_LD] = proc_ld,
    [IN_JP] = proc_jp,
};

IN_PROC inst_get_processor(in_type type) {
    return processors[type];
}