Re: eliminating array bounds checking overhead

On 26 Apr 2000 02:44:19 -0400, mayur_naik@my-deja.com wrote:
>Does any language or any machine provide some mechanism to:
>
>1. index an array without checking its bounds
>2. throw an exception if the index was actually out of range
>3. allow the programmer to catch and handle the exception rather than
> terminate the program


As for the language side Java definitely has "out of bound
exception". And I guess that it is trivial to emulate this on C++
using overloaded operator [].


As for the hardware side I guess that most modern architectures have
something like BOUND on Intel.


The trickery comes when one wants to use language feature fast or IOW
be hardware dependent. Well, I know nothing about compilers generating
hardware specific code like BOUND command on Intel.


Roman.
[BOUND is still useless, I know of no compilers that generate it. -John]

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