On Thu, 8 Jul 2021 18:15:23 GMT, Brian Burkhalter <b...@openjdk.org> wrote:
>> Please consider this change to make the `float` and `double` versions of
>> `java.lang.Math.abs()` branch-free.
>
> Brian Burkhalter has updated the pull request incrementally with one
> additional commit since the last revision:
>
> 6506405: Add some tests
test/jdk/java/lang/Math/AbsTests.java line 35:
> 33: */
> 34: public class AbsTests {
> 35: private static final float EULER_F = (float)Math.exp(1.0);
Could use Math.E here instead.
test/jdk/java/lang/Math/AbsTests.java line 168:
> 166: private static float testInRangeFloatAbs() {
> 167: int errors = 0;
> 168: float[][] testCases = {
For the particulars of the test vector for abs, another way to structure this
would be a 1-D array of positive numbers where nested test loops used the test
value and its negation as the input with the positive number as the expected
value.
test/jdk/java/lang/Math/AbsTests.java line 198:
> 196: float argument, float expected) {
> 197: float result = absFunc.apply(argument);
> 198: if (result != expected) {
I suggest looking at some other math test for the "equivalent" test idiom so
that NaNs could be used in the test vector.
-------------
PR: https://git.openjdk.java.net/jdk/pull/4711
