Function fpmul

src/big-decimal/utils.ts:65–67

(a: bigint, b: bigint, bits: number)

/** Fixed-point multiply on the base-2 grid: (a * b) >> bits */
export function fpmul(a: bigint, b: bigint, bits: number): bigint {
  return (a * b) >> BigInt(bits);
}

/** Fixed-point divide on the base-2 grid: (a << bits) / b */
export function fpdiv(a: bigint, b: bigint, bits: number): bigint {