RFR (M): 8003853: specify offset of IC load in java_to_interp stub

[Dean Long]

Looks good.

dl

On 4/23/2013 1:09 AM, Lindenmaier, Goetz wrote:
>
> Hi all,
>
> In the java_to_interp stub of CompiledStaticCalls one relocation is 
> used to find
>
> two code locations:
>
> -the beginning of the stub
>
> -the IC load instruction.
>
> On x86 and sparc, the IC load instruction is the first instruction of 
> the stub,
>
> thus both locations have the same address.
>
> On PPC, the IC load instruction is not the first instruction in the 
> stub, thus
>
> we must add an offset to the relocation to access it.
>
> As the manipulation of  CompiledStaticCalls is in shared code, we 
> would have
>
> to introduce platform dependencies there.
>
> This change moves the platform dependent code from CompiledStaticCall
>
> to a new file compiledIC_<cpu>.cpp.  It also moves the code issuing the
>
> stub from the ad file to this new file into the class CompiledStaticCall.
>
> This removes redundancies between x86_64.ad and x86_32.ad.  Also,
>
> 'extern' declarations in compile.cpp can be replaced by properly typed
>
> Calls to methods in CompiledStaticCall.
>
> Dean Long ran this change through JPRT with status OK (thanks!).
>
> Please review and push this change.
>
> http://cr.openjdk.java.net/~goetz/webrevs/8003853-3/ 
> <http://cr.openjdk.java.net/%7Egoetz/webrevs/8003853-3/>
>
> Best regards,
>
>   Goetz Lindenmaier
>

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