#ifndef __SCC_X86_64_ISEL_H__
#define __SCC_X86_64_ISEL_H__

#include <scc_lir_module.h>
#include <scc_tree_dump.h>

#include <x86/scc_x86_iform.h>
#include <x86/scc_x86_reg.h>

#include "../core_pass/scc_abi_lowering.h"
#include "../scc_mir_module.h"

typedef struct scc_x86_64_isel {
    scc_mir_instr_vec_t instrs;
    scc_lir_func_meta_t *func_meta;

    scc_abi_lowering_t abi_lowering;
} scc_x86_64_isel_t;

static void add_instr(scc_x86_64_isel_t *isel, const scc_mir_instr_t *instr) {
    scc_vec_push(isel->instrs, *instr);
}

static inline void add_instr_0(scc_x86_64_isel_t *isel,
                               scc_x86_iform_t opcode) {
    scc_mir_instr_t out = {.opcode = opcode, .num_operands = 0};
    add_instr(isel, &out);
}

static inline void add_instr_1(scc_x86_64_isel_t *isel, scc_x86_iform_t opcode,
                               scc_mir_operand_t op1) {
    scc_mir_instr_t out = {.opcode = opcode, .num_operands = 1};
    out.operands[0] = op1;
    add_instr(isel, &out);
}

static inline void add_instr_2(scc_x86_64_isel_t *isel, scc_x86_iform_t opcode,
                               scc_mir_operand_t op1, scc_mir_operand_t op2) {
    scc_mir_instr_t out = {.opcode = opcode, .num_operands = 2};
    out.operands[0] = op1;
    out.operands[1] = op2;
    add_instr(isel, &out);
}

static inline scc_mir_operand_t reg_operand(scc_x86_reg_t reg) {
    return (scc_mir_operand_t){.kind = SCC_MIR_OP_PREG, .preg = reg};
}

// Utils

void scc_x86_emit_move(scc_x86_64_isel_t *isel, scc_mir_operand_t dst,
                       scc_mir_operand_t src, u8 size);
scc_mir_operand_t scc_x86_lir_val_to_mir_op(scc_x86_64_isel_t *isel,
                                            const scc_lir_val_t *val);
static inline void emit_call(scc_x86_64_isel_t *isel, const char *callee) {
    scc_mir_operand_t sym = {.kind = SCC_MIR_OP_SYMBOL, .symbol = callee};
    add_instr_1(isel, SCC_X86_IFORM_CALL_NEAR_GPRV, sym);
}
static inline void emit_ret(scc_x86_64_isel_t *isel) {
    add_instr_0(isel, SCC_X86_IFORM_RET_NEAR);
}

#endif /* __SCC_X86_64_ISEL_H__ */