Request for reviews (M): 7059034: Use movxtod/movdtox on T4

Vladimir Kozlov vladimir.kozlov at
Thu Jul 7 09:01:37 PDT 2011

Thank you, Christian

Yes, I will definitely fix it.


On 7/7/11 3:24 AM, Christian Thalinger wrote:
> On Jul 7, 2011, at 1:04 AM, Vladimir Kozlov wrote:
>> Fixed 7059034: Use movxtod/movdtox on T4
>> Currently VM uses stack to move data between general and float registers on Sparc. Use new VIS3 mov instructions on T4 for such moves.
>> I removed R_F30,R_F31 from dflt_low_reg since they used as temps (see line 412).
>> Also fixed float<->integer conversion instructions since they used incorrect Width for float register encoding. For example, encoding failed for next instr ftoi(FloatRegisterImpl::D,F4,F1) and fitof(FloatRegisterImpl::D,F1,F8).
>> Tested with CTW, nsk.
>> I attached microbenchmark test to the bug report.
> I see you did some spaces cleanup in  Could you also do that with the new code you add to src/cpu/sparc/vm/vm_version_sparc.cpp?  E.g. if( x ) =>  if (x) and UseVIS=x =>  UseVIS = x.
> Otherwise this looks good.
> -- Christian

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