RFR (XS): 8007708: compiler/6855215 assert(VM_Version::supports_sse4_2())

[Christian Thalinger]

Looks good.  -- Chris

On Feb 6, 2013, at 6:37 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:

> http://cr.openjdk.java.net/~kvn/8007708/webrev/
> 
> The test runs with -XX:UseSSE=0 flag and as result VM_Version::supports_sse4_2() is false.
> 
> The code which generates assembler for string_compare intrinsic does not check UseSSE42Intrinsics flag when UseAVX > 1 but it uses sse4.2 instruction (pcmpestri).
> 
> Added missing check. I also added missing avx2 assert for vpermq instruction.
> 
> Ran all compiler regression tests with -Xcomp -XX:UseSSE=0 on avx2 machine.
> 
> Thanks,
> Vladimir
> 
>