Compiler/BEAGLEBK: Clarification for TI PRU ABI handling of R3.w0

user5199182

Part Number: BEAGLEBK

Tool/software: TI C/C++ Compiler

Hi,

Per SPRUHV7C, R3.w0 is an Expression Register. It is marked as neither "Save On Call", nor as "Save On Entry". Could you please clarify how should this be interpreted?

Is R3.w0 supposed to be used as "Assembler Temporary Register"? Or perhaps it is reserved for some special purpose and should not be used at all?

Thanks,
Dimitar

over 5 years ago

0 George Mock over 5 years ago

TI__Guru**** 244120 points

I'm all but certain R3.w0 is save on call. I will confirm that and get back to you.

Thanks and regards,

-George

0 George Mock over 5 years ago in reply to George Mock

TI__Guru**** 244120 points

I confirm that R3.w0 is save on call. I filed the entry CODEGEN-6818 in the SDOWP system to have the compiler manual updated. You are welcome to follow it with the SDOWP link below in my signature.

Thanks and regards,

-George

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Compiler/BEAGLEBK: Clarification for TI PRU ABI handling of R3.w0