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Altera_Forum
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16 years ago

Storing value in a reg

input [11:0] stimulus; reg val; always @(posedge clk) val <=# 1 |(stimulus); what should be the value stored in the register val? Is it the same as saying val = val | stimu...
Altera_Forum's avatar
Altera_Forum
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16 years ago

The use of the '|' operator in this case is referred to as a reduction operator. val will get the bitwise OR of all the bits in stimulus. So basically if any bit in stimulus is set, val will be a '1', otherwise, it will be '0';

It's the same as writing

val <= stimulus[11] | stimulus[10] | stimulus[9] ..... | stimulus[1] | stimulus[0];

only obviously signicantly shorter.

Jake