x86 Intrinsics for fma in Math Library

[Andrew Haley]

On 22/07/16 10:08, Andrew Haley wrote:
> On 21/07/16 18:18, Vladimir Kozlov wrote:
> 
>> Good suggestion. Need a test to confirm "correct" results matching
>> result of assembler instruction.
> 
> I've been looking at JDK tests for the correct fma rounding.  I've run
> these to check that AArch64 fma works correctly.  It turns out that if
> you run tests with inlining enabled, C2 collapses most of the code to
> nothing because of constant propagation.  If you run the tests with
> inlining enabled, you test the arithmetic at runtime.  I've also added
> a test which makes sure that rounding is only done once on the
> low-order bits.
> 
> This would form the basis for a HotSpot test, I think.

Ping?  This discussion seems to have gone very quiet.

Andrew.