/** floor(n / d), d > 0, n ≥ 0. */
export declare const idiv: (n: number, d: number) => number;
/** floor(n / d) toward −∞, any-sign n. */
export declare const fdiv: (n: number, d: number) => number;
/** Round half up (toward +∞), d > 0, any-sign n. */
export declare const rdiv: (n: number, d: number) => number;
export declare function popcount32(x: number): number;
export declare function nextPow2(n: number): number;
export declare function bytesToHex(bytes: Uint8Array): string;
export declare function hexToBytes(hex: string): Uint8Array;
export declare function align4(n: number): number;