- Synopsis
-
Count the number of bits set in each element
- Mnemonic
-
vcpop.v vd, vs2, vm
- Encoding (Vector)
{reg:[
{bits: 7, name: 'OP-V'},
{bits: 5, name: 'vd'},
{bits: 3, name: 'OPMVV'},
{bits: 5, name: '01110'},
{bits: 5, name: 'vs2'},
{bits: 1, name: 'vm'},
{bits: 6, name: '010010'},
]}
- Arguments
| Register | Direction | Definition |
|---|---|---|
Vs2 |
input |
Input elements |
Vd |
output |
Count of bits set |
- Description
-
A population count is performed on each element.
- Operation
function clause execute (VCPOP(vs2)) = {
foreach (i from vstart to vl-1) {
let input = get_velem(vs2, SEW, i);
let output : bits(SEW) = 0;
for (j = 0; j < SEW; j++)
output = output + input[j];
set_velem(vd, SEW, i, output)
}
RETIRE_SUCCESS
}- Included in