Hello everyone, AFAIK, MIPS64 and RV64 don't have 32-bit registers and according to their calling convention, they would sign-extend all 32-bit values when they are stored in 64-bit registers, both signed and unsigned, see: A related question in stackoverflow <https://stackoverflow.com/questions/52646216/zero-sign-extend-are-no-op-why-then-instructions-for-each-size-type> .
But in v8 it seems the uint32 values are zero-extended? I tried to sign-extend uint32 values, on mips64, which could elide some instructions, and only two more tests failed: - cctest/test-run-load-store/RunLoadStoreZeroExtend64 - cctest/test-run-load-store/RunUnalignedLoadStoreZeroExtend64 Just like their names suggest, they both may load some values and check whether they are zero-extended. So I wonder could uint32 values be sign-extended in v8 on MIPS64? Any suggestion would be appreciated, thanks! Thanks, Zhao Jiazhong -- -- v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-dev/a9163642-7e38-410a-8476-8bb4a5c545d0n%40googlegroups.com.
