Re: Does Casting Slow a Program Down?


"santosh" <santosh.k83@xxxxxxxxx> wrote in message
news:1170256067.706720.20060@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Quality of code generation is implementation defined. A good optimiser
might be able to figure out that usLimit is not changed and hence, use
a single, cached value. On some hardware, short and int might be of
the same size and representation. In such cases, the cast never takes
up any object code. But speed of execution is not specified by the
standard and no guarantees are made. An assignent statement that takes
ten days to complete is perfectly legal, as per the standard, as long
as all the side effects are resolved before the next sequence point.


I find the general question which (I think) hes asking interesting.

Can integer casts generate extra instructions?
How about floating point casts?


.

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