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> Well, the RISC code to check if a pointer is valid is: > LQ R6, addr ; load pointer into R6, R7. set bit in exception reg if no tag > TXER nn ; trap if no tag > to me that is software. The trap can be disabled by replacing the TXER > instruction by a NOOP. > The overhead is the TXER instruction and is not unacceptable. Are you saying that if you replace TXER instruction by NOOP and then go on to use untagged pointer, there will be no exception ? Alexei Pytel
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