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*/
/** * @test * @bug 6823354 * @summary These methods can be instrinsified by using bit scan, bit test, and population count instructions. * @modules java.base/jdk.internal.misc * @library /test/lib * * @run main/othervm -Xcomp * -XX:CompileCommand=compileonly,compiler.codegen.Test6823354::lzcomp * -XX:CompileCommand=compileonly,compiler.codegen.Test6823354::tzcomp * -XX:CompileCommand=compileonly,compiler.codegen.*::dolzcomp * -XX:CompileCommand=compileonly,compiler.codegen.*::dotzcomp * compiler.codegen.Test6823354
*/
package compiler.codegen;
import jdk.test.lib.Utils;
publicclass Test6823354 { // Arrays of corner case values. staticfinalint[] ia = newint[] { 0, 1, -1, Integer.MIN_VALUE, Integer.MAX_VALUE }; staticfinallong[] la = newlong[] { 0L, 1L, -1L, Long.MIN_VALUE, Long.MAX_VALUE };
publicstaticvoid main(String[] args) throws Exception { // Load the classes and the methods.
Integer.numberOfLeadingZeros(0);
Integer.numberOfTrailingZeros(0); Long.numberOfLeadingZeros(0); Long.numberOfTrailingZeros(0);
lz();
tz();
}
staticvoid lz() throws Exception { // int
// Test corner cases. for (int i = 0; i < ia.length; i++) { int x = ia[i];
check(x, lzcomp(x), lzint(x));
}
// Test all possible return values. for (int i = 0; i < Integer.SIZE; i++) { int x = 1 << i;
check(x, lzcomp(x), lzint(x));
}
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