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Altera_Forum's avatar
Altera_Forum
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15 years ago

to find out the number of "1"

hi,everyone i need to find out the number of "1" in a input (a), now ,i thik i could add every bit of input (a) to get the resut, just like : assign b=a[0]+a[0]+a[1]+a[2]+a[3]+a[4]; ----...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi,

I don't know Verilog

In VHDL, you can use "variable" for counters

you can use "function" or "procedure" to find out the number of '1'. This function will be something like 

for(i=0;i<IN_WIDTH;i=i+1)
a<=a+data_in;
end