On Tue, 19 Apr 2016 21:06:21 -0400, Phil Smith III wrote:
>Tom Marchant wrote:
>
>>Why not make your STC run AMODE 64, at least part of the time?
>
>Yeah, that's an option, but it's a lot more work and has other possible
>impacts
It's not that hard.
STMG R2,R15,SAVE64 save 64-bit registers
LLGTR BASE1,BASE1 clear bits 0-32 of first base register
LLGTR BASE2,BASE2 clear bits 0-32 of second base register
... clear bits 0-32 of more base registers
SAM64 , switch to AMODE 64
GETMAIN ... get storage to copy the data to
ST R1,WORKADDR save the address of the area obtained
... set up regs for MVCL
MVCL ... copy it below the line
SAM31 , back to AMODE 31
LMG R2,R15,SAVE64 restore the high halves of the registers
Now the Java data is all below the line. Yeah, I know, there will probably be a
bit more work as you will have to adjust pointers, for example.
--
Tom Marchant
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