RFR (M): 7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()

[Vladimir Kozlov]

My fault, missed it when I added MulVI case. I can add the break into my vectors 
safepoint changes you reviewed last week. Do you agree?

Thanks,
Vladimir

Roland Westrelin wrote:
> When I merged this with the current code base, I noticed a missing break in Matcher::match_rule_supported() on x86. See below.
> 
> Roland.
> 
> diff --git a/src/cpu/x86/vm/x86.ad b/src/cpu/x86/vm/x86.ad
> --- a/src/cpu/x86/vm/x86.ad
> +++ b/src/cpu/x86/vm/x86.ad
> @@ -509,10 +509,18 @@
>      case Op_PopCountL:
>        if (!UsePopCountInstruction)
>          return false;
> +    break;
>      case Op_MulVI:
>        if ((UseSSE < 4) && (UseAVX < 1)) // only with SSE4_1 or AVX
>          return false;
>      break;
> +    case Op_CompareAndSwapL:
> +#ifdef _LP64
> +    case Op_CompareAndSwapP:
> +#endif
> +      if (!VM_Version::supports_cx8())
> +        return false;
> +    break;
>    }
>    
>    return true;  // Per default match rules are supported.
>