[MATH-1273] Negative zero support in FastMath.pow

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 4.0
• Fix Version/s: 4.0, 3.6
• Flags: Patch
• Assignee: Unassigned
• Reporter: Qualtagh
• Created: 11/Sep/15 06:52
• Updated: 25/Jan/16 20:28
• Resolved: 11/Sep/15 18:02

Description

FastMath.pow(double, double) and FastMath.pow(double, long) functions never return negative zero.
Math.pow(-0.0, 5.0) = -0.0
FastMath.pow(-0.0, 5.0) = 0.0
Math.pow(-∞, -3.0) = -0.0
FastMath.pow(-∞, -3.0) = 0.0
Added support for negative zero.
Also, added ultimate tests to cover all special cases described in Math.pow javadoc.
Slightly edited an existing test: there were some typos and duplicates.