21 Aug
2011
21 Aug
'11
7:42 p.m.
On 16 August 2011 15:39, Johan Tibell
the CPU masks out the last 5 bits in the shift amount and only uses those when shifting
As an aside, this may be how it's specified now in all modern x86(-64) CPUs, but it definitely wasn't true for all CPUs. Some older x86 CPUs actually would set the value to zero if the shift amount was greater than the word length. (I'm not sure which, but may have been different in early 386 CPUs and Athlon CPUs.) / Thomas