tree 2ed1b7972872d16ce857817e15525b625e18b1ca
parent 79eb265ff54c869d306ed273aea5e9805294719b
author agicsaki <agicsaki@google.com> 1433265683 -0700
committer agicsaki <agicsaki@google.com> 1433868300 -0700

Implemented ceil and floor in StrictMath

Translated the ceiling and floor methods from the fdlibm library into Java
to remove transition to native code for these functions. Also updated the test
cases to include corner cases such as +infinity, -infinity, NaN, and interesting
values covering all lines of code found by random testing. Additionally updated
benchmarks to cover several interesting values for both functions.

Running the new benchmarks (for each function, taking the average of several calls
with differing values that ensure full line coverage) showed improved performance.

Ceiling before = 140.91 ns
Ceiling after = 86.55 ns

Floor before = 137.33 ns
Floor after = 86.64 ns

Bug: 21594029
Change-Id: I337c47daa2ae599bd0c0e7f11af4e457f96f9f9f