/*
 * Copyright (C) 2019 Intel Corporation. All rights reserved.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */

#include "jit_emit_function.h"
#include "jit_emit_exception.h"
#include "../jit_frontend.h"
#include "../jit_codegen.h"
#include "../../interpreter/wasm_runtime.h"

static bool
emit_callnative(JitCompContext *cc, JitReg native_func_reg, JitReg res,
                JitReg *params, uint32 param_count);

/* Prepare parameters for the function to call */
static bool
pre_call(JitCompContext *cc, const WASMType *func_type)
{
    JitReg value;
    uint32 i, outs_off;
    /* Prepare parameters for the function to call */
    outs_off =
        cc->total_frame_size + offsetof(WASMInterpFrame, lp)
        + wasm_get_cell_num(func_type->types, func_type->param_count) * 4;

    for (i = 0; i < func_type->param_count; i++) {
        switch (func_type->types[func_type->param_count - 1 - i]) {
            case VALUE_TYPE_I32:
#if WASM_ENABLE_REF_TYPES != 0
            case VALUE_TYPE_EXTERNREF:
            case VALUE_TYPE_FUNCREF:
#endif
                POP_I32(value);
                outs_off -= 4;
                GEN_INSN(STI32, value, cc->fp_reg, NEW_CONST(I32, outs_off));
                break;
            case VALUE_TYPE_I64:
                POP_I64(value);
                outs_off -= 8;
                GEN_INSN(STI64, value, cc->fp_reg, NEW_CONST(I32, outs_off));
                break;
            case VALUE_TYPE_F32:
                POP_F32(value);
                outs_off -= 4;
                GEN_INSN(STF32, value, cc->fp_reg, NEW_CONST(I32, outs_off));
                break;
            case VALUE_TYPE_F64:
                POP_F64(value);
                outs_off -= 8;
                GEN_INSN(STF64, value, cc->fp_reg, NEW_CONST(I32, outs_off));
                break;
            default:
                bh_assert(0);
                goto fail;
        }
    }

    /* Commit sp as the callee may use it to store the results */
    gen_commit_sp_ip(cc->jit_frame);

    return true;
fail:
    return false;
}

/* Push results */
static bool
post_return(JitCompContext *cc, const WASMType *func_type, JitReg first_res,
            bool update_committed_sp)
{
    uint32 i, n;
    JitReg value;

    n = cc->jit_frame->sp - cc->jit_frame->lp;
    for (i = 0; i < func_type->result_count; i++) {
        switch (func_type->types[func_type->param_count + i]) {
            case VALUE_TYPE_I32:
#if WASM_ENABLE_REF_TYPES != 0
            case VALUE_TYPE_EXTERNREF:
            case VALUE_TYPE_FUNCREF:
#endif
                if (i == 0 && first_res) {
                    bh_assert(jit_reg_kind(first_res) == JIT_REG_KIND_I32);
                    value = first_res;
                }
                else {
                    value = jit_cc_new_reg_I32(cc);
                    GEN_INSN(LDI32, value, cc->fp_reg,
                             NEW_CONST(I32, offset_of_local(n)));
                }
                PUSH_I32(value);
                n++;
                break;
            case VALUE_TYPE_I64:
                if (i == 0 && first_res) {
                    bh_assert(jit_reg_kind(first_res) == JIT_REG_KIND_I64);
                    value = first_res;
                }
                else {
                    value = jit_cc_new_reg_I64(cc);
                    GEN_INSN(LDI64, value, cc->fp_reg,
                             NEW_CONST(I32, offset_of_local(n)));
                }
                PUSH_I64(value);
                n += 2;
                break;
            case VALUE_TYPE_F32:
                if (i == 0 && first_res) {
                    bh_assert(jit_reg_kind(first_res) == JIT_REG_KIND_F32);
                    value = first_res;
                }
                else {
                    value = jit_cc_new_reg_F32(cc);
                    GEN_INSN(LDF32, value, cc->fp_reg,
                             NEW_CONST(I32, offset_of_local(n)));
                }
                PUSH_F32(value);
                n++;
                break;
            case VALUE_TYPE_F64:
                if (i == 0 && first_res) {
                    bh_assert(jit_reg_kind(first_res) == JIT_REG_KIND_F64);
                    value = first_res;
                }
                else {
                    value = jit_cc_new_reg_F64(cc);
                    GEN_INSN(LDF64, value, cc->fp_reg,
                             NEW_CONST(I32, offset_of_local(n)));
                }
                PUSH_F64(value);
                n += 2;
                break;
            default:
                bh_assert(0);
                goto fail;
        }
    }

    if (update_committed_sp)
        /* Update the committed_sp as the callee has updated the frame sp */
        cc->jit_frame->committed_sp = cc->jit_frame->sp;

    return true;
fail:
    return false;
}

static bool
pre_load(JitCompContext *cc, JitReg *argvs, const WASMType *func_type)
{
    JitReg value;
    uint32 i;

    /* Prepare parameters for the function to call */
    for (i = 0; i < func_type->param_count; i++) {
        switch (func_type->types[func_type->param_count - 1 - i]) {
            case VALUE_TYPE_I32:
#if WASM_ENABLE_REF_TYPES != 0
            case VALUE_TYPE_EXTERNREF:
            case VALUE_TYPE_FUNCREF:
#endif
                POP_I32(value);
                argvs[func_type->param_count - 1 - i] = value;
                break;
            case VALUE_TYPE_I64:
                POP_I64(value);
                argvs[func_type->param_count - 1 - i] = value;
                break;
            case VALUE_TYPE_F32:
                POP_F32(value);
                argvs[func_type->param_count - 1 - i] = value;
                break;
            case VALUE_TYPE_F64:
                POP_F64(value);
                argvs[func_type->param_count - 1 - i] = value;
                break;
            default:
                bh_assert(0);
                goto fail;
        }
    }

    gen_commit_sp_ip(cc->jit_frame);

    return true;
fail:
    return false;
}

static JitReg
create_first_res_reg(JitCompContext *cc, const WASMType *func_type)
{
    if (func_type->result_count) {
        switch (func_type->types[func_type->param_count]) {
            case VALUE_TYPE_I32:
#if WASM_ENABLE_REF_TYPES != 0
            case VALUE_TYPE_EXTERNREF:
            case VALUE_TYPE_FUNCREF:
#endif
                return jit_cc_new_reg_I32(cc);
            case VALUE_TYPE_I64:
                return jit_cc_new_reg_I64(cc);
            case VALUE_TYPE_F32:
                return jit_cc_new_reg_F32(cc);
            case VALUE_TYPE_F64:
                return jit_cc_new_reg_F64(cc);
            default:
                bh_assert(0);
                return 0;
        }
    }
    return 0;
}

bool
jit_compile_op_call(JitCompContext *cc, uint32 func_idx, bool tail_call)
{
    WASMModule *wasm_module = cc->cur_wasm_module;
    WASMFunctionImport *func_import;
    WASMFunction *func;
    WASMType *func_type;
    JitFrame *jit_frame = cc->jit_frame;
    JitReg fast_jit_func_ptrs, jitted_code = 0;
    JitReg native_func, *argvs = NULL, *argvs1 = NULL, func_params[5];
    JitReg native_addr_ptr, module_inst_reg, ret, res;
    uint32 jitted_func_idx, i;
    uint64 total_size;
    const char *signature = NULL;
    /* Whether the argument is a pointer/str argument and
       need to call jit_check_app_addr_and_convert */
    bool is_pointer_arg;
    bool return_value = false;

    if (func_idx < wasm_module->import_function_count) {
        /* The function to call is an import function */
        func_import = &wasm_module->import_functions[func_idx].u.function;
        func_type = func_import->func_type;

        /* Call fast_jit_invoke_native in some cases */
        if (!func_import->func_ptr_linked /* import func hasn't been linked */
            || func_import->call_conv_wasm_c_api /* linked by wasm_c_api */
            || func_import->call_conv_raw /* registered as raw mode */
            || func_type->param_count >= 5 /* registered as normal mode, but
                                              jit_emit_callnative only supports
                                              maximum 6 registers now
                                              (include exec_nev) */) {
            JitReg arg_regs[3];

            if (!pre_call(cc, func_type)) {
                goto fail;
            }

            /* Call fast_jit_invoke_native */
            ret = jit_cc_new_reg_I32(cc);
            arg_regs[0] = cc->exec_env_reg;
            arg_regs[1] = NEW_CONST(I32, func_idx);
            arg_regs[2] = cc->fp_reg;
            if (!jit_emit_callnative(cc, fast_jit_invoke_native, ret, arg_regs,
                                     3)) {
                goto fail;
            }

            /* Convert the return value from bool to uint32 */
            GEN_INSN(AND, ret, ret, NEW_CONST(I32, 0xFF));

            /* Check whether there is exception thrown */
            GEN_INSN(CMP, cc->cmp_reg, ret, NEW_CONST(I32, 0));
            if (!jit_emit_exception(cc, EXCE_ALREADY_THROWN, JIT_OP_BEQ,
                                    cc->cmp_reg, NULL)) {
                goto fail;
            }

            if (!post_return(cc, func_type, 0, true)) {
                goto fail;
            }

            return true;
        }

        /* Import function was registered as normal mode, and its argument count
           is no more than 5, we directly call it */

        signature = func_import->signature;
        bh_assert(signature);

        /* Allocate memory for argvs*/
        total_size = sizeof(JitReg) * (uint64)(func_type->param_count);
        if (total_size > 0) {
            if (total_size >= UINT32_MAX
                || !(argvs = jit_malloc((uint32)total_size))) {
                goto fail;
            }
        }

        /* Pop function params from stack and store them into argvs */
        if (!pre_load(cc, argvs, func_type)) {
            goto fail;
        }

        ret = jit_cc_new_reg_I32(cc);
        func_params[0] = module_inst_reg = get_module_inst_reg(jit_frame);
        func_params[4] = native_addr_ptr = jit_cc_new_reg_ptr(cc);
        GEN_INSN(ADD, native_addr_ptr, cc->exec_env_reg,
                 NEW_CONST(PTR, offsetof(WASMExecEnv, jit_cache)));

        /* Traverse each pointer/str argument, call
           jit_check_app_addr_and_convert to check whether it is
           in the range of linear memory and and convert it from
           app offset into native address */
        for (i = 0; i < func_type->param_count; i++) {

            is_pointer_arg = false;

            if (signature[i + 1] == '*') {
                /* param is a pointer */
                is_pointer_arg = true;
                func_params[1] = NEW_CONST(I32, false); /* is_str = false */
                func_params[2] = argvs[i];
                if (signature[i + 2] == '~') {
                    /* pointer with length followed */
                    func_params[3] = argvs[i + 1];
                }
                else {
                    /* pointer with length followed */
                    func_params[3] = NEW_CONST(I32, 1);
                }
            }
            else if (signature[i + 1] == '$') {
                /* param is a string */
                is_pointer_arg = true;
                func_params[1] = NEW_CONST(I32, true); /* is_str = true */
                func_params[2] = argvs[i];
                func_params[3] = NEW_CONST(I32, 1);
            }

            if (is_pointer_arg) {
                if (!jit_emit_callnative(cc, jit_check_app_addr_and_convert,
                                         ret, func_params, 5)) {
                    goto fail;
                }

                /* Convert the return value from bool to uint32 */
                GEN_INSN(AND, ret, ret, NEW_CONST(I32, 0xFF));
                /* Check whether there is exception thrown */
                GEN_INSN(CMP, cc->cmp_reg, ret, NEW_CONST(I32, 0));
                if (!jit_emit_exception(cc, EXCE_ALREADY_THROWN, JIT_OP_BEQ,
                                        cc->cmp_reg, NULL)) {
                    return false;
                }

                /* Load native addr from pointer of native addr,
                   or exec_env->jit_cache */
                argvs[i] = jit_cc_new_reg_ptr(cc);
                GEN_INSN(LDPTR, argvs[i], native_addr_ptr, NEW_CONST(I32, 0));
            }
        }

        res = create_first_res_reg(cc, func_type);

        /* Prepare arguments of the native function */
        if (!(argvs1 =
                  jit_calloc(sizeof(JitReg) * (func_type->param_count + 1)))) {
            goto fail;
        }
        argvs1[0] = cc->exec_env_reg;
        for (i = 0; i < func_type->param_count; i++) {
            argvs1[i + 1] = argvs[i];
        }

        /* Call the native function */
        native_func = NEW_CONST(PTR, (uintptr_t)func_import->func_ptr_linked);
        if (!emit_callnative(cc, native_func, res, argvs1,
                             func_type->param_count + 1)) {
            jit_free(argvs1);
            goto fail;
        }
        jit_free(argvs1);

        /* Check whether there is exception thrown */
        GEN_INSN(LDI8, ret, module_inst_reg,
                 NEW_CONST(I32, offsetof(WASMModuleInstance, cur_exception)));
        GEN_INSN(CMP, cc->cmp_reg, ret, NEW_CONST(I32, 0));
        if (!jit_emit_exception(cc, EXCE_ALREADY_THROWN, JIT_OP_BNE,
                                cc->cmp_reg, NULL)) {
            goto fail;
        }

        if (!post_return(cc, func_type, res, false)) {
            goto fail;
        }
    }
    else {
        /* The function to call is a bytecode function */
        func = wasm_module
                   ->functions[func_idx - wasm_module->import_function_count];
        func_type = func->func_type;

        /* jitted_code = func_ptrs[func_idx - import_function_count] */
        fast_jit_func_ptrs = get_fast_jit_func_ptrs_reg(jit_frame);
        jitted_code = jit_cc_new_reg_ptr(cc);
        jitted_func_idx = func_idx - wasm_module->import_function_count;
        GEN_INSN(LDPTR, jitted_code, fast_jit_func_ptrs,
                 NEW_CONST(I32, (uint32)sizeof(void *) * jitted_func_idx));

        if (!pre_call(cc, func_type)) {
            goto fail;
        }

        res = create_first_res_reg(cc, func_type);

        GEN_INSN(CALLBC, res, 0, jitted_code, NEW_CONST(I32, func_idx));

        if (!post_return(cc, func_type, res, true)) {
            goto fail;
        }
    }

    /* Clear part of memory regs and table regs as their values
       may be changed in the function call */
    if (cc->cur_wasm_module->possible_memory_grow)
        clear_memory_regs(jit_frame);
    clear_table_regs(jit_frame);

    /* Ignore tail call currently */
    (void)tail_call;

    return_value = true;

fail:
    if (argvs)
        jit_free(argvs);

    return return_value;
}

static JitReg
pack_argv(JitCompContext *cc)
{
    /* reuse the stack of the next frame */
    uint32 stack_base;
    JitReg argv;

    stack_base = cc->total_frame_size + offsetof(WASMInterpFrame, lp);
    argv = jit_cc_new_reg_ptr(cc);
    GEN_INSN(ADD, argv, cc->fp_reg, NEW_CONST(PTR, stack_base));
    if (jit_get_last_error(cc)) {
        return (JitReg)0;
    }
    return argv;
}

bool
jit_compile_op_call_indirect(JitCompContext *cc, uint32 type_idx,
                             uint32 tbl_idx)
{
    WASMModule *wasm_module = cc->cur_wasm_module;
    JitBasicBlock *block_import, *block_nonimport, *func_return;
    JitReg elem_idx, native_ret, argv, arg_regs[6];
    JitFrame *jit_frame = cc->jit_frame;
    JitReg tbl_size, offset, offset_i32;
    JitReg func_import, func_idx, tbl_elems, func_count;
    JitReg func_type_indexes, func_type_idx, fast_jit_func_ptrs;
    JitReg offset1_i32, offset1, func_type_idx1, res;
    JitReg import_func_ptrs, jitted_code_idx, jitted_code;
    WASMType *func_type;
    uint32 n;

    POP_I32(elem_idx);

    /* check elem_idx */
    tbl_size = get_table_cur_size_reg(jit_frame, tbl_idx);

    GEN_INSN(CMP, cc->cmp_reg, elem_idx, tbl_size);
    if (!jit_emit_exception(cc, EXCE_UNDEFINED_ELEMENT, JIT_OP_BGEU,
                            cc->cmp_reg, NULL))
        goto fail;

    /* check func_idx */
    if (UINTPTR_MAX == UINT64_MAX) {
        offset_i32 = jit_cc_new_reg_I32(cc);
        offset = jit_cc_new_reg_I64(cc);
        GEN_INSN(SHL, offset_i32, elem_idx, NEW_CONST(I32, 2));
        GEN_INSN(I32TOI64, offset, offset_i32);
    }
    else {
        offset = jit_cc_new_reg_I32(cc);
        GEN_INSN(SHL, offset, elem_idx, NEW_CONST(I32, 2));
    }
    func_idx = jit_cc_new_reg_I32(cc);
    tbl_elems = get_table_elems_reg(jit_frame, tbl_idx);
    GEN_INSN(LDI32, func_idx, tbl_elems, offset);

    GEN_INSN(CMP, cc->cmp_reg, func_idx, NEW_CONST(I32, -1));
    if (!jit_emit_exception(cc, EXCE_UNINITIALIZED_ELEMENT, JIT_OP_BEQ,
                            cc->cmp_reg, NULL))
        goto fail;

    func_count = NEW_CONST(I32, wasm_module->import_function_count
                                    + wasm_module->function_count);
    GEN_INSN(CMP, cc->cmp_reg, func_idx, func_count);
    if (!jit_emit_exception(cc, EXCE_INVALID_FUNCTION_INDEX, JIT_OP_BGTU,
                            cc->cmp_reg, NULL))
        goto fail;

    /* check func_type */
    /* get func_type_idx from func_type_indexes */
    if (UINTPTR_MAX == UINT64_MAX) {
        offset1_i32 = jit_cc_new_reg_I32(cc);
        offset1 = jit_cc_new_reg_I64(cc);
        GEN_INSN(SHL, offset1_i32, func_idx, NEW_CONST(I32, 2));
        GEN_INSN(I32TOI64, offset1, offset1_i32);
    }
    else {
        offset1 = jit_cc_new_reg_I32(cc);
        GEN_INSN(SHL, offset1, func_idx, NEW_CONST(I32, 2));
    }

    func_type_indexes = get_func_type_indexes_reg(jit_frame);
    func_type_idx = jit_cc_new_reg_I32(cc);
    GEN_INSN(LDI32, func_type_idx, func_type_indexes, offset1);

    type_idx = wasm_get_smallest_type_idx(wasm_module->types,
                                          wasm_module->type_count, type_idx);
    func_type_idx1 = NEW_CONST(I32, type_idx);
    GEN_INSN(CMP, cc->cmp_reg, func_type_idx, func_type_idx1);
    if (!jit_emit_exception(cc, EXCE_INVALID_FUNCTION_TYPE_INDEX, JIT_OP_BNE,
                            cc->cmp_reg, NULL))
        goto fail;

    /* pop function arguments and store it to out area of callee stack frame */
    func_type = wasm_module->types[type_idx];
    if (!pre_call(cc, func_type)) {
        goto fail;
    }

    /* store elem_idx and func_idx to exec_env->jit_cache */
    GEN_INSN(STI32, elem_idx, cc->exec_env_reg,
             NEW_CONST(I32, offsetof(WASMExecEnv, jit_cache)));
    GEN_INSN(STI32, func_idx, cc->exec_env_reg,
             NEW_CONST(I32, offsetof(WASMExecEnv, jit_cache) + 4));

    block_import = jit_cc_new_basic_block(cc, 0);
    block_nonimport = jit_cc_new_basic_block(cc, 0);
    func_return = jit_cc_new_basic_block(cc, 0);
    if (!block_import || !block_nonimport || !func_return) {
        goto fail;
    }

    /* Commit register values to locals and stacks */
    gen_commit_values(jit_frame, jit_frame->lp, jit_frame->sp);
    /* Clear frame values */
    clear_values(jit_frame);

    /* jump to block_import or block_nonimport */
    GEN_INSN(CMP, cc->cmp_reg, func_idx,
             NEW_CONST(I32, cc->cur_wasm_module->import_function_count));
    GEN_INSN(BLTU, cc->cmp_reg, jit_basic_block_label(block_import),
             jit_basic_block_label(block_nonimport));

    /* block_import */
    cc->cur_basic_block = block_import;

    elem_idx = jit_cc_new_reg_I32(cc);
    GEN_INSN(LDI32, elem_idx, cc->exec_env_reg,
             NEW_CONST(I32, offsetof(WASMExecEnv, jit_cache)));
    GEN_INSN(LDI32, func_idx, cc->exec_env_reg,
             NEW_CONST(I32, offsetof(WASMExecEnv, jit_cache) + 4));

    argv = pack_argv(cc);
    if (!argv) {
        goto fail;
    }
    native_ret = jit_cc_new_reg_I32(cc);
    arg_regs[0] = cc->exec_env_reg;
    arg_regs[1] = NEW_CONST(I32, tbl_idx);
    arg_regs[2] = elem_idx;
    arg_regs[3] = NEW_CONST(I32, type_idx);
    arg_regs[4] = NEW_CONST(I32, func_type->param_cell_num);
    arg_regs[5] = argv;

    import_func_ptrs = get_import_func_ptrs_reg(jit_frame);
    func_import = jit_cc_new_reg_ptr(cc);
    if (UINTPTR_MAX == UINT64_MAX) {
        JitReg func_import_offset = jit_cc_new_reg_I32(cc);
        JitReg func_import_offset_i64 = jit_cc_new_reg_I64(cc);
        GEN_INSN(SHL, func_import_offset, func_idx, NEW_CONST(I32, 3));
        GEN_INSN(I32TOI64, func_import_offset_i64, func_import_offset);
        GEN_INSN(LDPTR, func_import, import_func_ptrs, func_import_offset_i64);
    }
    else {
        JitReg func_import_offset = jit_cc_new_reg_I32(cc);
        GEN_INSN(SHL, func_import_offset, func_idx, NEW_CONST(I32, 2));
        GEN_INSN(LDPTR, func_import, import_func_ptrs, func_import_offset);
    }
    if (!jit_emit_callnative(cc, fast_jit_call_indirect, native_ret, arg_regs,
                             6)) {
        goto fail;
    }

    /* Convert bool to uint32 */
    GEN_INSN(AND, native_ret, native_ret, NEW_CONST(I32, 0xFF));

    /* Check whether there is exception thrown */
    GEN_INSN(CMP, cc->cmp_reg, native_ret, NEW_CONST(I32, 0));
    if (!jit_emit_exception(cc, EXCE_ALREADY_THROWN, JIT_OP_BEQ, cc->cmp_reg,
                            NULL)) {
        return false;
    }

    /* Store res into current frame, so that post_return in
        block func_return can get the value */
    n = cc->jit_frame->sp - cc->jit_frame->lp;
    if (func_type->result_count > 0) {
        switch (func_type->types[func_type->param_count]) {
            case VALUE_TYPE_I32:
#if WASM_ENABLE_REF_TYPES != 0
            case VALUE_TYPE_EXTERNREF:
            case VALUE_TYPE_FUNCREF:
#endif
                res = jit_cc_new_reg_I32(cc);
                GEN_INSN(LDI32, res, argv, NEW_CONST(I32, 0));
                GEN_INSN(STI32, res, cc->fp_reg,
                         NEW_CONST(I32, offset_of_local(n)));
                break;
            case VALUE_TYPE_I64:
                res = jit_cc_new_reg_I64(cc);
                GEN_INSN(LDI64, res, argv, NEW_CONST(I32, 0));
                GEN_INSN(STI64, res, cc->fp_reg,
                         NEW_CONST(I32, offset_of_local(n)));
                break;
            case VALUE_TYPE_F32:
                res = jit_cc_new_reg_F32(cc);
                GEN_INSN(LDF32, res, argv, NEW_CONST(I32, 0));
                GEN_INSN(STF32, res, cc->fp_reg,
                         NEW_CONST(I32, offset_of_local(n)));
                break;
            case VALUE_TYPE_F64:
                res = jit_cc_new_reg_F64(cc);
                GEN_INSN(LDF64, res, argv, NEW_CONST(I32, 0));
                GEN_INSN(STF64, res, cc->fp_reg,
                         NEW_CONST(I32, offset_of_local(n)));
                break;
            default:
                bh_assert(0);
                goto fail;
        }
    }

    gen_commit_values(jit_frame, jit_frame->lp, jit_frame->sp);
    clear_values(jit_frame);
    GEN_INSN(JMP, jit_basic_block_label(func_return));

    /* basic_block non_import */
    cc->cur_basic_block = block_nonimport;

    GEN_INSN(LDI32, func_idx, cc->exec_env_reg,
             NEW_CONST(I32, offsetof(WASMExecEnv, jit_cache) + 4));

    /* get jitted_code */
    fast_jit_func_ptrs = get_fast_jit_func_ptrs_reg(jit_frame);
    jitted_code_idx = jit_cc_new_reg_I32(cc);
    jitted_code = jit_cc_new_reg_ptr(cc);
    GEN_INSN(SUB, jitted_code_idx, func_idx,
             NEW_CONST(I32, cc->cur_wasm_module->import_function_count));
    if (UINTPTR_MAX == UINT64_MAX) {
        JitReg jitted_code_offset = jit_cc_new_reg_I32(cc);
        JitReg jitted_code_offset_64 = jit_cc_new_reg_I64(cc);
        GEN_INSN(SHL, jitted_code_offset, jitted_code_idx, NEW_CONST(I32, 3));
        GEN_INSN(I32TOI64, jitted_code_offset_64, jitted_code_offset);
        GEN_INSN(LDPTR, jitted_code, fast_jit_func_ptrs, jitted_code_offset_64);
    }
    else {
        JitReg jitted_code_offset = jit_cc_new_reg_I32(cc);
        GEN_INSN(SHL, jitted_code_offset, jitted_code_idx, NEW_CONST(I32, 2));
        GEN_INSN(LDPTR, jitted_code, fast_jit_func_ptrs, jitted_code_offset);
    }

    res = 0;
    if (func_type->result_count > 0) {
        switch (func_type->types[func_type->param_count]) {
            case VALUE_TYPE_I32:
#if WASM_ENABLE_REF_TYPES != 0
            case VALUE_TYPE_EXTERNREF:
            case VALUE_TYPE_FUNCREF:
#endif
                res = jit_cc_new_reg_I32(cc);
                break;
            case VALUE_TYPE_I64:
                res = jit_cc_new_reg_I64(cc);
                break;
            case VALUE_TYPE_F32:
                res = jit_cc_new_reg_F32(cc);
                break;
            case VALUE_TYPE_F64:
                res = jit_cc_new_reg_F64(cc);
                break;
            default:
                bh_assert(0);
                goto fail;
        }
    }
    GEN_INSN(CALLBC, res, 0, jitted_code, func_idx);
    /* Store res into current frame, so that post_return in
        block func_return can get the value */
    n = cc->jit_frame->sp - cc->jit_frame->lp;
    if (func_type->result_count > 0) {
        switch (func_type->types[func_type->param_count]) {
            case VALUE_TYPE_I32:
#if WASM_ENABLE_REF_TYPES != 0
            case VALUE_TYPE_EXTERNREF:
            case VALUE_TYPE_FUNCREF:
#endif
                GEN_INSN(STI32, res, cc->fp_reg,
                         NEW_CONST(I32, offset_of_local(n)));
                break;
            case VALUE_TYPE_I64:
                GEN_INSN(STI64, res, cc->fp_reg,
                         NEW_CONST(I32, offset_of_local(n)));
                break;
            case VALUE_TYPE_F32:
                GEN_INSN(STF32, res, cc->fp_reg,
                         NEW_CONST(I32, offset_of_local(n)));
                break;
            case VALUE_TYPE_F64:
                GEN_INSN(STF64, res, cc->fp_reg,
                         NEW_CONST(I32, offset_of_local(n)));
                break;
            default:
                bh_assert(0);
                goto fail;
        }
    }
    /* commit and clear jit frame, then jump to block func_ret */
    gen_commit_values(jit_frame, jit_frame->lp, jit_frame->sp);
    clear_values(jit_frame);
    GEN_INSN(JMP, jit_basic_block_label(func_return));

    /* translate block func_return */
    cc->cur_basic_block = func_return;
    if (!post_return(cc, func_type, 0, true)) {
        goto fail;
    }

    /* Clear part of memory regs and table regs as their values
       may be changed in the function call */
    if (cc->cur_wasm_module->possible_memory_grow)
        clear_memory_regs(cc->jit_frame);
    clear_table_regs(cc->jit_frame);
    return true;
fail:
    return false;
}

#if WASM_ENABLE_REF_TYPES != 0
bool
jit_compile_op_ref_null(JitCompContext *cc, uint32 ref_type)
{
    PUSH_I32(NEW_CONST(I32, NULL_REF));
    (void)ref_type;
    return true;
fail:
    return false;
}

bool
jit_compile_op_ref_is_null(JitCompContext *cc)
{
    JitReg ref, res;

    POP_I32(ref);

    GEN_INSN(CMP, cc->cmp_reg, ref, NEW_CONST(I32, NULL_REF));
    res = jit_cc_new_reg_I32(cc);
    GEN_INSN(SELECTEQ, res, cc->cmp_reg, NEW_CONST(I32, 1), NEW_CONST(I32, 0));
    PUSH_I32(res);

    return true;
fail:
    return false;
}

bool
jit_compile_op_ref_func(JitCompContext *cc, uint32 func_idx)
{
    PUSH_I32(NEW_CONST(I32, func_idx));
    return true;
fail:
    return false;
}
#endif

#if defined(BUILD_TARGET_X86_64) || defined(BUILD_TARGET_AMD_64)
static bool
emit_callnative(JitCompContext *cc, JitReg native_func_reg, JitReg res,
                JitReg *params, uint32 param_count)
{
    JitInsn *insn;
    char *i64_arg_names[] = { "rdi", "rsi", "rdx", "rcx", "r8", "r9" };
    char *f32_arg_names[] = { "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5" };
    char *f64_arg_names[] = { "xmm0_f64", "xmm1_f64", "xmm2_f64",
                              "xmm3_f64", "xmm4_f64", "xmm5_f64" };
    JitReg i64_arg_regs[6], f32_arg_regs[6], f64_arg_regs[6], res_reg = 0;
    JitReg eax_hreg = jit_codegen_get_hreg_by_name("eax");
    JitReg xmm0_hreg = jit_codegen_get_hreg_by_name("xmm0");
    uint32 i, i64_reg_idx, float_reg_idx;

    bh_assert(param_count <= 6);

    for (i = 0; i < 6; i++) {
        i64_arg_regs[i] = jit_codegen_get_hreg_by_name(i64_arg_names[i]);
        f32_arg_regs[i] = jit_codegen_get_hreg_by_name(f32_arg_names[i]);
        f64_arg_regs[i] = jit_codegen_get_hreg_by_name(f64_arg_names[i]);
    }

    i64_reg_idx = float_reg_idx = 0;
    for (i = 0; i < param_count; i++) {
        switch (jit_reg_kind(params[i])) {
            case JIT_REG_KIND_I32:
                GEN_INSN(I32TOI64, i64_arg_regs[i64_reg_idx++], params[i]);
                break;
            case JIT_REG_KIND_I64:
                GEN_INSN(MOV, i64_arg_regs[i64_reg_idx++], params[i]);
                break;
            case JIT_REG_KIND_F32:
                GEN_INSN(MOV, f32_arg_regs[float_reg_idx++], params[i]);
                break;
            case JIT_REG_KIND_F64:
                GEN_INSN(MOV, f64_arg_regs[float_reg_idx++], params[i]);
                break;
            default:
                bh_assert(0);
                return false;
        }
    }

    if (res) {
        switch (jit_reg_kind(res)) {
            case JIT_REG_KIND_I32:
                res_reg = eax_hreg;
                break;
            case JIT_REG_KIND_I64:
                res_reg = res;
                break;
            case JIT_REG_KIND_F32:
                res_reg = xmm0_hreg;
                break;
            case JIT_REG_KIND_F64:
                res_reg = res;
                break;
            default:
                bh_assert(0);
                return false;
        }
    }

    insn = GEN_INSN(CALLNATIVE, res_reg, native_func_reg, param_count);
    if (!insn) {
        return false;
    }

    i64_reg_idx = float_reg_idx = 0;
    for (i = 0; i < param_count; i++) {
        switch (jit_reg_kind(params[i])) {
            case JIT_REG_KIND_I32:
            case JIT_REG_KIND_I64:
                *(jit_insn_opndv(insn, i + 2)) = i64_arg_regs[i64_reg_idx++];
                break;
            case JIT_REG_KIND_F32:
                *(jit_insn_opndv(insn, i + 2)) = f32_arg_regs[float_reg_idx++];
                break;
            case JIT_REG_KIND_F64:
                *(jit_insn_opndv(insn, i + 2)) = f64_arg_regs[float_reg_idx++];
                break;
            default:
                bh_assert(0);
                return false;
        }
    }

    if (res && res != res_reg) {
        GEN_INSN(MOV, res, res_reg);
    }

    return true;
}
#else
static bool
emit_callnative(JitCompContext *cc, JitRef native_func_reg, JitReg res,
                JitReg *params, uint32 param_count)
{
    JitInsn *insn;
    uint32 i;

    bh_assert(param_count <= 6);

    insn = GEN_INSN(CALLNATIVE, res, native_func_reg, param_count);
    if (!insn)
        return false;

    for (i = 0; i < param_count; i++) {
        *(jit_insn_opndv(insn, i + 2)) = params[i];
    }
    return true;
}
#endif

bool
jit_emit_callnative(JitCompContext *cc, void *native_func, JitReg res,
                    JitReg *params, uint32 param_count)
{
    return emit_callnative(cc, NEW_CONST(PTR, (uintptr_t)native_func), res,
                           params, param_count);
}