SafeCast96.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.7.0 <0.9.0;

library SafeCast96  {
    /**
     * @dev Returns the downcasted int96 from uint256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     */
    function toInt96(uint256 value) internal pure returns (int96) {
        require(value <= uint256(int256(type(int96).max)), "SafeCast96: value doesn't fit in 96 bits");
        return int96(int256(value));
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     */
    function toInt96(int256 value) internal pure returns (int96) {
        require(value >= type(int96).min && value <= type(int96).max, "SafeCast96: value doesn't fit in 96 bits");
        return int96(value);
    }

     /**
     * @dev Returns the downcasted int96 from uint128, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     */
    function toInt96(uint128 value) internal pure returns (int96) {
        require(value <= uint128(int128(type(int96).max)), "SafeCast96: value doesn't fit in 96 bits");
        return int96(int128(value));
    }

    /**
     * @dev Returns the downcasted int96 from int128, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     */
    function toInt96(int128 value) internal pure returns (int96) {
        require(value >= type(int96).min && value <= type(int96).max, "SafeCast96: value doesn't fit in 96 bits");
        return int96(value);
    }
}