RFR(S): 8159368: [JVMCI] SPARCHotSpotRegisterConfig.callingConvention gives incorrect calling convention for native calls containing fp args

[Igor Veresov]

The .c file probably needs a copyright header. Otherwise looks good.

igor

> On Jun 16, 2016, at 4:54 AM, Stefan Anzinger <stefan.anzinger at oracle.com> wrote:
> 
> Hello,
> 
> we found a bug in the JVMCI defined SPARC calling convention when
> calling native methods with single float arguments. Previously the
> HotSpot Calling Convention was used, which is different to the one
> defined in the native ABI [1].
> 
> This fix implements the correct native calling convention in the SPARC
> ABI [1] in SPARCHotSpotRegisterConfig.java.
> 
> The rest of the change is a jtreg test which exercises native calls on
> AMD64 and SPARC with code installed via JVMCI. Different parameter types
> and argument counts are tested.
> 
> https://bugs.openjdk.java.net/browse/JDK-8159368
> http://cr.openjdk.java.net/~sanzinger/8159368/webrev.01/
> 
> Reference:
> [1] http://sparc.org/wp-content/uploads/2014/01/SCD.2.4.1.pdf.gz
> 
> Stefan