[MI400] Is there an easy way to scan for bits?

[Harry Williams <planesmart@xxxxxxxxxxxx>]

I need to change a data  into variable length bits, then translate these
bits to a number.  As an example. I start reading the bits, and if I
read  00110101 then I translate it to the number 0.  If I read 000111 I
translate it to 1,  0111 translates to 2, 1000 goes to 3, 10011 is 8,
..... 0100111 translates to 18.   There is about 100 of these codes.  My
concern is speed, since I have to translate up to 30k of these 100
codes, if I take too many steps doing this, or if I am not efficient
then it can easily eat up the CPU.  The table needs to be from 2 bits to
12 bits.  I currently see no easy way of doing this, efficiently.   But
I know there are a lot smarter people than me on this list.  Any
suggestions?

Example.  00110101000111011110001011000000000001 would translate to
0,1,2,3,4,999.

Next,
I need to take the translated number and turn on bits.  If I get
1,2,3,4, then I would create
1111111111.  Which the 1 produces 1 bit, 2 would produce 11, 3 would
produce 111, and 4 would produce 1111.  With these number I could turn
bits on or off.  1,-2,3,-4 would be 1001110000.