On 19/05/2015 11:03, Adriaan van Os wrote:
the cpu, so if you want to guarantee consistent behaviour on all
platforms, you can no longer just emit a shift left/right instruction
and have to add all kinds of checks.
Maybe we should support emitting range checks for the right operand
though (to give an error if it falls outside the range of shift
values whose behaviour is defined).
The right operand of a bitwise shift is a count, a real-world number
of bits. A negative number doesn' t make sense and must regarded as an
error. So yes, emitting range checking is the right idea. We should do
better in Pascal than in C .....
True, if range checks are enabled, otherwise see my other mail
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