src/op/i32_const.c


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/*
 * nanowasm, a tiny WebAssembly/Wasm interpreter
 * Copyright (C) 2023-2024  Xavier Del Campo Romero
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#include <nanowasm/nw.h>
#include <nw/io.h>
#include <nw/interp.h>
#include <nw/log.h>
#include <nw/ops.h>

static enum nw_state get_value(struct nw_interp *const i)
{
    nw_varuint32 value;
    const struct nw_io_cfg *const cfg = &i->cfg.io;
    struct nw_sm_leb128 *const l = &i->sm.i32_const.leb128;
    const enum nw_state n = nwp_varuint32(cfg, l, &value);

    if (n)
        return n;
    else if (nwp_interp_stack_push(i, &value, sizeof value))
    {
        LOG("%s: nwp_interp_stack_push failed\n", __func__);
        return NW_FATAL;
    }

    nwp_interp_resume(i);
    return NW_AGAIN;
}

void nwp_op_i32_const(struct nw_interp *const i)
{
    i->next = get_value;
    i->sm.i32_const = (const struct nw_i_sm_i32_const){0};
}