On 22/06/14 08:25 PM, Jerry Morrison wrote: > > The post also links to Wikipedia on Intel MPX > <http://en.wikipedia.org/wiki/Intel_MPX>: Intel is adding x86 extensions > to aid memory safety! I think it's for array bounds checking, but the > article is unclear.
It's for faster (but not free) array bounds checking. I don't think Rust will be able to use it because it unwinds on out-of-bounds rather than aborting, and it will be difficult to turn the OS support (perhaps SIGFPE / SIGSEGV on *nix) into well defined unwinding in LLVM. > (BTW is there a use for /signed/ wraparound?) Yes, but it's not as common so C leaves it as undefined for portability to architectures not using two's complement arithmetic.
signature.asc
Description: OpenPGP digital signature
_______________________________________________ Rust-dev mailing list Rust-dev@mozilla.org https://mail.mozilla.org/listinfo/rust-dev
