Are the bitshift opcodes more efficient cpu-wise than the
multiplication and division opcodes, or are they just doing
multiplication and division in their code, too.

The reason I ask is because I multiply and divide by constant powers
of 2 a lot, and when I switched to using bitshift opcodes for
efficiency I found that 127 >> 7 results in a fraction which makes me
think the bitshift opcode is just dividing by 128. It makes sense
since everything is floating-point internally, so I'm wondering if
it's saving any cpu cycles to use bitshifts.

~ Andy Fillebrown

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Bah! Disregard that. I was tracing the wrong variable. 127 >> 7 does return 0.

On Sat, Jul 11, 2015 at 3:54 PM, andy fillebrown
 wrote:
> Are the bitshift opcodes more efficient cpu-wise than the
> multiplication and division opcodes, or are they just doing
> multiplication and division in their code, too.
>
> The reason I ask is because I multiply and divide by constant powers
> of 2 a lot, and when I switched to using bitshift opcodes for
> efficiency I found that 127 >> 7 results in a fraction which makes me
> think the bitshift opcode is just dividing by 128. It makes sense
> since everything is floating-point internally, so I'm wondering if
> it's saving any cpu cycles to use bitshifts.
>
> ~ Andy Fillebrown

------------------------------------------------------------------------------
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