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root/jsr166/jsr166/src/loops/LoopHelpers.java

Comparing jsr166/src/loops/LoopHelpers.java (file contents):
Revision 1.1 by jsr166, Fri Apr 9 20:12:06 2004 UTC vs.
Revision 1.2 by peierls, Thu Dec 30 15:15:43 2004 UTC

#	Line 12 | Line 12 | class LoopHelpers {
12		// Some mindless computation to do between synchronizations...
13
14		/**
15	<	* generates 32 bit pseudo-random numbers.
15	>	* generates 32 bit pseudo-random numbers.
16		* Adapted from http://www.snippets.org
17		*/
18	<	public static int compute1(int x) {
18	>	public static int compute1(int x) {
19		int lo = 16807 * (x & 0xFFFF);
20		int hi = 16807 * (x >>> 16);
21		lo += (hi & 0x7FFF) << 16;
#	Line 35 | Line 35 | class LoopHelpers {
35		*  Computes a linear congruential random number a random number
36		*  of times.
37		*/
38	<	public static int compute2(int x) {
38	>	public static int compute2(int x) {
39		int loops = (x >>> 4) & 7;
40		while (loops-- > 0) {
41		x = (x * 2147483647) % 16807;
#	Line 43 | Line 43 | class LoopHelpers {
43		return x;
44		}
45
46	<	public static int compute3(int x) {
46	>	/**
47	>	* Yet another random number generator
48	>	*/
49	>	public static int compute3(int x) {
50		int t = (x % 127773) * 16807 - (x / 127773) * 2836;
51		return (t > 0)? t : t + 0x7fffffff;
52		}
53
54		/**
55	+	* Yet another random number generator
56	+	*/
57	+	public static int compute4(int x) {
58	+	return x * 134775813 + 1;
59	+	}
60	+
61	+	/**
62		* An actually useful random number generator, but unsynchronized.
63		* Basically same as java.util.Random.
64		*/
#	Line 99 | Line 109 | class LoopHelpers {
109		b.replace(b.length()-num.length(), b.length(), num);
110		return b.toString();
111		}
112	<
112	>
113		}

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