< prev index next >

src/java.base/share/classes/java/math/BigInteger.java

Print this page
8247782: typos in java.math
Reviewed-by: rriggs, lancea, darcy

*** 2749,2759 **** // Calculate new base from m1 BigInteger base2 = (this.signum < 0 || this.compareTo(m1) >= 0 ? this.mod(m1) : this); ! // Caculate (base ** exponent) mod m1. BigInteger a1 = (m1.equals(ONE) ? ZERO : base2.oddModPow(exponent, m1)); // Calculate (this ** exponent) mod m2 BigInteger a2 = base.modPow2(exponent, p); --- 2749,2759 ---- // Calculate new base from m1 BigInteger base2 = (this.signum < 0 || this.compareTo(m1) >= 0 ? this.mod(m1) : this); ! // Calculate (base ** exponent) mod m1. BigInteger a1 = (m1.equals(ONE) ? ZERO : base2.oddModPow(exponent, m1)); // Calculate (this ** exponent) mod m2 BigInteger a2 = base.modPow2(exponent, p);
*** 2903,2913 **** * the buffer and save a squaring. * * This means that if you have a k-bit window, to compute n^z, * where z is the high k bits of the exponent, 1/2 of the time * it requires no squarings. 1/4 of the time, it requires 1 ! * squaring, ... 1/2^(k-1) of the time, it reqires k-2 squarings. * And the remaining 1/2^(k-1) of the time, the top k bits are a * 1 followed by k-1 0 bits, so it again only requires k-2 * squarings, not k-1. The average of these is 1. Add that * to the one squaring we have to do to compute the table, * and you'll see that a k-bit window saves k-2 squarings --- 2903,2913 ---- * the buffer and save a squaring. * * This means that if you have a k-bit window, to compute n^z, * where z is the high k bits of the exponent, 1/2 of the time * it requires no squarings. 1/4 of the time, it requires 1 ! * squaring, ... 1/2^(k-1) of the time, it requires k-2 squarings. * And the remaining 1/2^(k-1) of the time, the top k bits are a * 1 followed by k-1 0 bits, so it again only requires k-2 * squarings, not k-1. The average of these is 1. Add that * to the one squaring we have to do to compute the table, * and you'll see that a k-bit window saves k-2 squarings
< prev index next >