shift operator << and >> question...

[Peter Lee]

ASSUME unsigned int = 32 bits

#q1 unsigned int u1 = 3u << 0u valid?
#q2 unsigned int u2 = 3u >> 0u valid?
#q3 unsigned int u3 = 3u << 32u valid?
#q4 unsigned int u4 = 3u >> 32u valid?

 

[peter koch]

ASSUME unsigned int = 32 bits

#q1 unsigned int u1 = 3u << 0u valid?
#q2 unsigned int u2 = 3u >> 0u valid? Yes
#q3 unsigned int u3 = 3u << 32u valid?
#q4 unsigned int u4 = 3u >> 32u valid?

No - you are only allowed to shift less than the bits in the type. So
the max is 31 in your case.

/Peter

 

[Rolf Magnus]

ASSUME unsigned int = 32 bits

#q1 unsigned int u1 = 3u << 0u valid?
yes

#q2 unsigned int u2 = 3u >> 0u valid?
yes

#q3 unsigned int u3 = 3u << 32u valid?
no

#q4 unsigned int u4 = 3u >> 32u valid?

no