te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>Why must there be an instruction before out statements in Rust in-line assembly? - Stack Overflow

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    你的位置： 首页>programmer>Why must there be an instruction before out statements in Rust in-line assembly? - Stack Overflow

    Why must there be an instruction before out statements in Rust in-line assembly? - Stack Overflow

    programmeradmin4浏览0评论

    I just want to take the value in a1 and assign it to a variable, so why does it make me put an instruction before using an out, or in this case a lateout? I've written the following assembly, but I imagine there's a better way to do this:

    unsafe {
    asm!(
        "mv t0, t0",
        lateout("a1") device_tree_pointer,
        clobber_abi("system")
    );
}

    I wish I could have just written the following, but the compiler won't let me:

    unsafe {
    asm!(
        lateout("a1") device_tree_pointer,
        clobber_abi("system")
    );
}

    Is there a reason for this I'm not comprehending?

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