Le 08/05/2022 à 10:56, Andrew Haley a écrit :
Some targets (x86, in particular) have intrinsics (log, trig) that are
faster than StrictMath and also more accurate. StrictMath is not about
accuracy, but cross-architecture down-to-the-last bit reproducibility.
Whether we still need that reproducibility is, I suppose, something
for debate.
In production code, maybe not. But in test code (e.g. using JUnit), when
the program does a lot of trigonometric operations (e.g. map
projections), I have meet cases where a test was successful on a machine
but failed on another machine. The systematic use of StrictMath in all
JUnit test code ensure that the difference in behavior is not in the
test code, so we can focus our debugging effort on the main code.
Martin
