RFR: JDK-8301833: Add manual tests for FDLIBM porting

[Brian Burkhalter]

On Mon, 6 Feb 2023 01:50:55 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> To help add assurances that the main-line port of FDLIBM to Java is working correctly, added some long-running manual tests to probe that the transliteration port and the corresponding StrictMath method are in agreement on a large number of argument, say, all float values.
> 
> To test the transliteration port, this test can be run against a build where the JDK has *not* had the FDLIBM code used for StrictMath ported to Java.

test/jdk/java/lang/StrictMath/ExhaustingTests.java line 37:

> 35: import java.util.function.DoubleUnaryOperator;
> 36: 
> 37: public class ExhaustingTests {

Great name!

test/jdk/java/lang/StrictMath/ExhaustingTests.java line 57:

> 55:         long failures = 0;
> 56:         UnaryTestCase[] testCases = {
> 57:          // new UnaryTestCase("sqrt",  FdlibmTranslit::sqrt,  StrictMath::sqrt),

Maybe not include the TBD cases as part of this initial PR?

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PR: https://git.openjdk.org/jdk/pull/12430